BEARING KNOWLEDGE
Bearing Guides and Technical Articles
A total of 187 pieces of technical information. Please confirm specific product selection and usage conditions based on actual working conditions.
Structural principles and daily maintenance of roller press
1. The working principle of the roller press. The roller press equipment adopts the group work method of single particle crushing based on the principle of low energy consumption for high-pressure material layer crushing. After the brittle materials are extruded through the high-pressure zone, the particle size of the materials is rapidly reduced...
Tractor Bearing Disassembly and Maintenance Guide
As a core transmission component, a tractor bearing directly affects equipment stability and service life. Efficient, safe removal, installation and maintenance require standardized procedures...
Screw unit oil temperature is too high and common causes
1. The oil temperature of the screw refrigeration unit is too high. First, the normal oil temperature range of the screw refrigeration unit must be clarified. According to industry specifications and equipment operation standards, when the screw refrigeration unit is running, the normal operating temperature of the lubricating oil...
Brief discussion on misalignment of wind power gearbox
Author: Wu Xinsheng, Senior Engineer (Nanjing Avis Transmission Technology Co., Ltd.) The misalignment of the fan refers to the skew or offset between the axis line of the two rotors of the fan and motor and the center line of the bearing...
Chemical composition, performance characteristics and main uses of 16 rubber
1, natural rubber (NR) is mainly rubber hydrocarbon (polyisoprene) and contains a small amount of protein, moisture, resin acid, sugar and inorganic salts. High elasticity, high elongation strength, tear resistance and electrical insulation...
What should I do if the bearing of a sealless magnetic pump is stuck?
The magnetic pump is a kind of non-contact torque transmission through magnetic transmission, thereby replacing the dynamic seal with a static seal, making the pump completely leak-free. Since the pump shaft and internal magnetic rotor are completely enclosed by the pump body and isolation sleeve,…
Troubleshooting common problems in robot joints
Whether it is an industrial robot or a household robot, you will always encounter a problem after using it for a long time - joint failure: stuck and inflexible, abnormal noise, reduced accuracy, unable to rotate... Many people encounter these problems...
Installation, debugging and acceptance of CNC machine tools
1.1 Installation of the CNC machine tool body 1. Before the arrival of the CNC machine tool, the user should make preparations for installation according to the machine tool basic drawing provided by the machine tool manufacturer, and make reserved holes for installing anchor bolts...
Effect of temperature rise of drilling and tapping machine spindle on machining accuracy
With the advancement of science and technology, the improvement of product performance and the improvement of user requirements for product experience, products require higher and higher precision for machine tool equipment processing. When processing the current 3C parts...
High temperature transport chain lubrication, the difference between oil and grease
For many people engaged in industrial production, transportation chain products are commonplace. As an important symbol of automated production, its role is irreplaceable. Under high temperature conditions, transportation...
Forklift parts replacement cycle
Like cars, forklifts also have wearing parts. In order to ensure the safety and performance of the forklift, it generally needs to be replaced in time. 1, forklift oil filter To ensure that the forklift oil and forklift engine oil...
Full analysis of harmonic reducer bearing selection: How to accurately match according to working conditions?
Harmonic reducers play an important role in modern mechanical transmission systems with their advantages of high precision, large transmission ratio and compact structure. Its overall performance and working life largely depend on the internal…
Choosing the right lubricant for pharmaceutical equipment
Over the past few years, pharmaceutical industry equipment has increasingly used food-grade lubricants. While food-grade lubricants are beneficial, there are other issues to consider. New equipment for producing drugs is generally...
What is the root cause of turbine bearing oil film failure?
During the speed-up process of the unit, the shaft vibration increased abnormally as the speed increased, triggering an oil film oscillation alarm and forcing the unit to slow down. Also, after startup after maintenance, the bearing temperature continues to be high and the oil film thickness monitoring value is lower than the setting...
Limiting speed of thin-walled bearings
The limiting speed of a thin-walled bearing is the highest speed that the bearing can reach when it is running. It mainly depends on the relationship between the heat generated by friction and the heat dissipated when the bearing is running, as well as the bearing material and structural dimensions...
Tangshan Donghua Iron and Steel's Bidding Announcement on Wire Bar Rolling Mill Bearing Project
Tangshan Donghua Iron and Steel's bidding announcement on the wire bar rolling mill bearing project welcomes professional companies with strength, credibility and intention to cooperate that meet the bidding conditions to sign up. 1. Basic information on bidding projects...
Plastic bearing cage: What if the glass fiber PA66 is not high-temperature resistant enough, if the glass fiber reinforced PA46 is unstable due to excessive water absorption, and if the cost of PEEK is too high... what should I do?
In the application of plastic bearing cages, Suzhou Wintone Engineering Plastics Wintone T31 is a special engineering plastic for heat creep resistance, high load-bearing capacity and wear-resistant bearing cages, which can keep your plastic bearings...
Twenty-high rolling mill
The main performance parameters and uses of the twenty-high rolling mill The twenty-high rolling mill is the most suitable rolling mill for cold rolling stainless steel, silicon steel and high-strength metal and alloy thin strips and ultra-thin strips. It is responsible for almost 96% of the world's...
Analysis and troubleshooting of typical faults of ship's main generator
Guo Kaifang (Xiamen Shipbuilding Industry Co., Ltd.) Abstract: As one of the main equipment of the ship, the main generator has a highly automated management system. However, due to the failure of the equipment itself or misoperation, etc...
Main causes of failure of rotating machinery
In recent years, with the development of modern industry, the demand for large rotating machinery has been increasing, and this type of machinery itself has continued to develop towards high power, large capacity, high speed, high efficiency and complexity...
How to prevent oxidation and deterioration of lubricating oil during storage?
Lubricating grease will oxidize and deteriorate during long-term storage. In order to prevent oxidative deterioration of stored oil, the following aspects must be paid attention to during storage: 1. Avoid direct contact between metal and lubricating grease,…
Basic knowledge of rolling bearings
Rolling bearings are extremely important and common components in mechanical engineering. Their core function is to support the rotating shaft, reduce frictional resistance and ensure rotation accuracy. 1. What is a rolling bearing? Rolling bearings are…
Examples of use cases for connection methods with linear motion mechanisms
Cylinder piston rod connection method 1, linear motion mechanism connection method principle The linear motion mechanism has the following 2 typical connection methods. ● In the rotary type, the coupling absorbs the rotational runout,…
Cylindrical roller bearing vibration (speed) technical conditions
1, range N type, NU type, NJ type and NF type, diameter series 2, 3, nominal inner diameter is 15mm~120mm, radial clearance complies with GB/T4604-2006...
Possible faults and diagnostic steps of the hydraulic system of the injection molding machine
When using an injection molding machine, there are many possible failures in the hydraulic system of the injection molding machine. It is the result of the comprehensive influence of many factors, and its discreteness is relatively large. Therefore, when performing fault diagnosis, you must...
Selection of motor bearings
The selection of motor bearings is crucial to the overall performance of the motor. When selecting bearings, a thorough assessment of the bearing's suitability must be made. First, it is necessary to evaluate the design life of the motor and bearings as well as the bearings themselves...
Composition and Application of Babbitt Alloy
Babbitt metal is a low melting point soft alloy widely used on the surface of sliding bearings. It is a metal material composed of tin, lead, antimony and copper as the main elements. That…
CNC Roll Grinder Guide Rail Wear Fault Detection and Repair Guide
1. Causes of guide rail wear failures As the core moving parts of CNC roll grinders, guide rails have various causes of wear failures: Long-term load friction: The equipment continues to run, and the friction between the guide rails and the slider intensifies, leading to...
Creep and creep of rolling bearings
Creep, also known as creep, is the slow and permanent deformation of solid materials under the action of stress. Different from general plastic deformation, plastic deformation usually occurs after the stress exceeds the elastic limit...
Some typical problems in maintenance work
1. Failure to correctly judge and analyze faults, and blind disassembly and disassembly are commonplace. Some maintenance personnel are not clear about the mechanical structure and principles of the equipment and do not carefully analyze the cause of the failure, so they cannot accurately judge...
Marking methods for bolts, nuts, washers and other types of fasteners
1. Marking of screws or bolts Name, standard number, nominal diameter × pitch × nominal length - material - wrenching form - surface treatment 1. Name Use the normative name specified in the national standard, such as: screw...
Common fault phenomena, causes and troubleshooting methods of power steering system
1. The power steering is heavy or the power assist is insufficient. Fault phenomenon: The steering is heavy and the hydraulic power assist is temporarily lost. Cause of the fault: ① The V-belt of the oil pump is loose ② The oil level in the oil storage tank is too low...
How to deal with the tooth skipping fault in the elevator chain?
Bucket elevator chain swing is one of the common problems among users, but if users do not pay enough attention, long-term use may also cause other components to malfunction, such as chain tooth skipping or chain breakage,...
Reasons and analysis of leakage of mechanical seal of constant pressure water supply pump
The main forms of mechanical seal leakage of constant pressure water supply pumps are: leakage due to pressure, leakage due to medium, periodic leakage of mechanical seals, insufficient lubricating oil on the sealing surface causing dry friction or roughening...
Causes and preventive measures of metal surface roughness defects
Surface roughness is generally caused by the machining method used and other factors, such as the friction between the tool and the part surface during the machining process, the plastic deformation of the surface metal during chip separation, and the process...
Analysis of locking phenomena and preventive measures of stainless steel fasteners
Fasteners are a type of mechanical parts that are widely used. They are characterized by a wide variety of specifications, different performance and uses, and a high degree of standardization, serialization, and generalization. Among them, stainless steel fasteners…
The function, structure, usage and precautions of vernier caliper
Author: Yu Haidong 1 The role of vernier calipers Vernier calipers are usually used to measure workpieces with high precision. It can measure the inner and outer diameter, length, width and depth of parts, as shown in the figure below...
Explore the secrets of spherical bearings
The human shoulder joint allows the arm to rotate 360 degrees, and the hip joint allows the thigh to swing freely forward, backward, left, and right. Without joints, bones are just stiff sticks, unable to complete any complex movements. The equipment is also…
Structure and selection of externally driven linear motors
Linear stepper motors, also known as linear stepper motors, rotate by a magnetic rotor core that interacts with the pulsed electromagnetic field generated by the stator. The linear stepper motor converts the rotational motion inside the motor...
Compressor bearing inspection and maintenance tips
The inspection and maintenance of centrifugal compressor bearings (i.e. sliding bearings) is the core link to ensure the safe, stable and long-term operation of the unit. The inspection content is systematic and precise, mainly covering appearance inspection, clearance...
New national standard released - 4 item in the field of rolling bearings
On 2026 7 2 and 7 on 30, the State Administration for Market Regulation and the National Standardization Administration issued National Standards of the People's Republic of China with 2026 No. 29 and No. 33 respectively...
NSK universal standard series CH type linear guide
In the wave of transformation and upgrading of the manufacturing industry, the stable supply and cost control of core components have become the key to corporate competitiveness. Faced with the common dilemma of long delivery cycles and high prices for imported overseas products, such as...
What issues need to be paid attention to in machine tool maintenance?
1. Clean the machine tool regularly: After long-term use of the machine tool, a large amount of dust and oil will accumulate, affecting the normal operation of the machine tool. Therefore, the machine tool needs to be cleaned and wiped regularly to remove dust from various parts...
How to avoid the ball screw accuracy from declining again?
As the core transmission element in CNC tool machinery, ball screws play a vital role in providing accurate positioning, high speed and repeatability. However, in practical applications, ball bearings…
Selection, use, troubleshooting and maintenance of belt conveyors
1. Selection of belt conveyor The selection and technical requirements of belt conveyor should meet the regulations of GB/T10595, and meet the working environment, reasonable selection of bandwidth, belt speed, conveying capacity, tape,...
Maintenance method for reducer brake oil leakage
The harm of reducer brake oil leakage is huge. Because when an oil leakage failure occurs, the brake cannot obtain sufficient opening pressure, the winch reducer will be in a braking state, and the machine will jam,...
Safety technical measures for oil seal replacement of reducer of overhead passenger equipment
1. Project Overview This operation is to replace the output shaft/input shaft oil seal of the main reducer of the overhead passenger device. The oil seal is aging, leaking, and leaking oil, resulting in the loss of reducer lubricating oil, equipment wear, and excessive...
Measures to remove odor from emulsion
In the production of modern cold rolling mills, usually in the production of cold rolling technology, a complex emulsion system is used to spray a certain amount of emulsion into the roll gap and the strip surface. After the emulsion enters the rolling deformation zone,...
Failure analysis of machine tool electric tool rest that keeps rotating
The fault that each tool position of the CNC machine tool electric tool holder keeps rotating is mainly caused by the following aspects: ① The CNC machine tool system has no +24v;com output; use a multimeter to measure the system outlet,…
Analysis of the causes of diesel engine burning tiles
Abstract: Burning tiles is one of the major mechanical failures of diesel engines. The causes of diesel engine burning include improper assembly, insufficient oil pressure, oil deterioration, etc. This article analyzes the causes of these failures...
Changzhou Embodied Intelligence Industry Research
1. Introduction In 2025, "embodied intelligence" was written into the government work report for the first time, marking the official elevation of this track to a national strategic direction. Embodied intelligence as artificial intelligence and robotics technology deeply...
Cement ball mill discharge end cover replacement and bearing heating treatment
Liang Liqiang Rong Jianyong (Hebei Luquan Jinyu Dingxin Cement Co., Ltd.) Abstract: Ф4m×13m When replacing the discharge end liner of the cement mill, it was found that there was a long penetration through the hole of the end cover plate screw...
Characteristics of bearing solid grease and its impact on noise
Bearing solid grease (also known as dry film grease or solid additive-containing grease) is a special lubricant that evenly disperses solid lubricant particles in the base grease. Its characteristics are explained in detail below…
Common faults and solutions of high-voltage motors
There are many reasons for the failure of AC high-voltage motors. For this reason, it is necessary to explore a set of targeted and clear troubleshooting methods for various types of failures, and propose effective preventive measures, and...
A brief discussion on the maintenance and repair of mining automation equipment
Introduction As an important part of mining, mining automation equipment is directly related to the normal operation of mining activities. With the continuous improvement of the level of mechanical automation in our country, people are more concerned about mining...
Abnormal axial displacement of steam turbine
The main hazard is damage to the thrust bearing of the steam turbine, and in severe cases, wear of the static part of the steam turbine. Main phenomenon: 1. The axial displacement indication increases, a sound and light alarm sound, and the expansion difference changes accordingly. 2.…
Application of calcium sulfonate complex grease in work roll bearings of hot-rolled wide-band steel mills
Li Discipline Inspection Commission Zhao Wei Yang Taotao (Sinopec Lubricant Tianjin Branch) Abstract: With the development and upgrading of hot-rolled wide-band steel rolling mill equipment, the working conditions of the rolling mill bearings have become more...
Things to note before installing bearings
Cai Hongbin first checks the packaging, the quality of the packaging box, and whether the packaging is regular. Check the printing later to see if the fonts are clear and whether the barcode printing is blurry. Generally speaking, brands produced by regular manufacturers have their own...
Slewing support inspection of TTS crane
1, tower body slewing bearing axial wear measurement • Turn the crane to position A, use a plug gauge to measure the gap between points 1 and point 2; • Turn the crane to position B, use a plug gauge to measure the gap between points 1 and point 2;…
Things about anti-wear hydraulic oil!
The viscosity grades of anti-wear hydraulic oil in my country are divided into eight types: 10#, 15#, 22#, 32#, 46#, 68#, 100#, and 150#. The commonly used anti-wear hydraulic oil viscosity grades are...
New national standard released - 7 item in the field of rolling bearings
On October 31, 2025, the State Administration for Market Regulation (Standardization Administration of China), through China National Standards Announcement No. 29 of 2025, approved and issued 758 recommended national…
The influence of bearing preloading method and speed
There are two types of axial preload for bearings, one is constant pressure preload and the other is positioning preload. Under constant pressure preload, the radial stiffness of the bearing increases slightly as the rotational speed increases, while the axial and angular stiffness rapidly...
Digital Intelligence Empowerment: The Practice and Future of Bearing Industry Upgrading
Read and Think Scientific and technological innovation is the core driving force for the upgrading of the bearing industry. In the current era of increasingly fierce competition in the global manufacturing industry, we can only accelerate the advancement of "numbers", move toward "intelligence", and strengthen the role of digital intelligence technology in the axis...
A brief discussion on the daily maintenance and upkeep of canned pumps
Canned pumps are mainly used to transport toxic, flammable, explosive, highly corrosive, radioactive and precious liquids. Therefore, a large number of canned pumps are used in the chemical industry. The cost of the canned pump is relatively high, and the maintenance of the canned pump...
What are the functions of bearing chamfering?
Chamfering is a term in mechanical engineering. In order to remove burrs on parts caused by machining and to facilitate the assembly of parts, chamfering is generally made on the ends of parts. Bevels can be seen everywhere in our lives, mobile phones...
Six ways to use cutting fluid
The method of using cutting fluid has a great impact on tool life and processing quality. Even the best cutting fluid cannot play its due role if it cannot be effectively delivered to the cutting area. Therefore, we choose to use…
Analysis of common failure forms and causes of shield cutting tools
1. Tool wear pattern When the shield machine is advancing forward, the propulsion cylinder must provide sufficient thrust to ensure that the shield moves forward. The thrust of the propulsion cylinder acts on the formation through the cutterhead. When the cutterhead rotates...
Temperature (temperature rise) measurement technology of high-speed rotating bearings
Author: Li Binbin, et al. As the bearing speed increases, correspondingly, the various frictional heat generation of the bearing intensifies, the cage and rolling elements slip, the rolling surface is damaged, the cage stability, the fatigue life is reduced, etc...
#3 Furnace air preheater support and guide bearing procurement tender announcement
Due to production and operation needs, Jiangsu Huaiyin Power Generation Co., Ltd. is now conducting a public bidding for the procurement of #3 furnace air preheater supports and guide bearings. The relevant matters are now announced as follows: 1, project overview 1.…
What should I do if the motor driven by the inverter overheats?
Why do inverter-driven motors overheat? This is because the voltage driven by the inverter contains rich high-frequency components. The voltage waveform of the inverter-driven motor is not a sine wave voltage, but...
General rules for bolt and nut assembly
1. Purpose During the process of product assembly and equipment maintenance, standardize the assembly work of bolts and nuts to prevent related losses caused by inconsistencies in assembly methods and torques. In order to ensure assembly quality, manufacturing...
The size of the coupling cannot be measured, how to select and replace it?
The old coupling cannot be removed, the shaft extension is buried in the equipment, the caliper cannot be measured, the inner diameter cannot be measured, what should I do with the outer diameter and length? If you choose the wrong one and fail to install it, you will waste time and money! Method 1: No need to disassemble the coupling...
Reliability coefficient of bearing life
The industry generally uses L10 life as the basic bearing life evaluation principle, L10 is the basic rated life, a group of bearings of the same model, under the equivalent dynamic load, 90% of the bearings will not produce material...
Structural diagram of ball screw nut pair and its working principle
Composition: Mainly composed of screw rod, nut, ball and raceway (ball return device), nut seat, etc. Working principle: Arc spiral grooves are processed on the screw rod and nut. When they are put together, they form a spiral...
How to detect the rotor temperature of permanent magnet synchronous motor?
Motor rotor temperature is a key factor that has an important impact on motor performance and safety. However, many electric drives currently do not have the function of rotor temperature evaluation. OEMs have increasingly demanding control accuracy...
Why do bearings rust? Master these points to make your bearings last longer
According to statistics, about 30% to 40% of premature bearing failures are related to corrosion. Once the bearings rust, it will affect the operating accuracy and cause noise, vibration and other problems. So, understand the causes of bearing rust and…
Competency requirements for mechanical equipment inspectors
Intermediate inspector: Senior inspector: (Source: The Youth of Wrench)…
Instructions for use of drogue sleeve
1. The usage time of the taper sleeve is mainly related to the number of disassembly and assembly and the rolling tonnage. The taper of the taper sleeve is 1: 12, which is 4°46′18.8…
Exploration on the causes and control of hydraulic leakage in steel rolling equipment
From the perspective of steel companies, steel rolling occupies a very important position. At present, the quality of products has been continuously improved, and it has gradually become more automated, and the control accuracy has also been greatly improved, which has further laid the foundation for...
Three grinding methods of M1332 cylindrical grinder
The outer circle of the workpiece is generally ground on an ordinary M1332 cylindrical grinder or a M1432 universal cylindrical grinder. Cylindrical grinding generally has three methods: longitudinal grinding, transverse grinding and deep grinding. (1) Longitudinal grinding method Longitudinal grinding…
Spectrum characteristics and case analysis of common vibration faults in rotating equipment
1. Unbalance Rotor imbalance is a fault caused by the mass eccentricity of the rotor component or the defect of the rotor component. It is the most common fault of rotating machinery. Unreasonable structural design, incorrect manufacturing and installation...
Selection requirements for grease used in steel plants
China's steel production is huge, and the demand for grease in steel mills is also huge. However, at the same time, the working conditions of steel mills pose huge challenges to the performance of grease: high temperature, water, heavy load, etc. Once lubricated...
Positioning error correction in linear motion systems
Advances in servo technology mean customers expect their servo-controlled machines to operate at increasingly higher levels of performance. One performance indicator is machine positioning accuracy. Better machine precision ensures manufactured parts and…
New industry standard released, 7 item in rolling bearing field
2026 8 17 The Ministry of Industry and Information Technology of the People's Republic of China approved the release of the 674 industry standard with the 2026 22 announcement. This announcement involves the field of rolling bearings...
Common quality problems and quality control and testing of fasteners
Fasteners are usually used to tightly connect two or more components together to ensure that they will not loosen or move relative to each other during use, helping to provide necessary mechanical support in the overall structure, ensuring...
Henan Iron and Steel Anyang Iron and Steel Southern Electromagnetic Company's backing bearing public bidding
1. Bidding conditions This bidding project Henan Steel Anyang Southern Electromagnetic Co., Ltd. backing bearing has been approved by the tenderer. The tenderer is Henan Anyang Southern Electromagnetic New Material Technology Co., Ltd., and the funds will come from...
Avoid pits when repairing the gearbox bearing chamber, so there will be no recurrence after repair!
Anyone who does equipment maintenance knows that once there is a problem with the gearbox bearing chamber, vibration and noise will occur. In serious cases, the machine will be shut down and production will be stopped, causing considerable losses. Many colleagues relapse not long after completing cultivation. In fact, it is because they have not found the other party...
Analysis on the causes of water-lubricated stern shaft seal leakage and management requirements
Fault phenomenon: A certain ship discovered that the stern shaft water seal failed during navigation, and a large amount of seawater leaked into the engine room. Find the cause: After the crew stopped for maintenance, it was found that impurities were attached to the contact position between the stern shaft and the sealing ring...
A seemingly simple compressor bearing operating temperature problem was completely solved using two different methods!
Zhou Fujun There are two centrifugal compressors in the Public Engineering Department of Lanzhou Petrochemical Company. During operation, oil leakage occurred due to bearing temperature. Bearing operating temperature is the most important factor that reflects bearing quality...
Analysis of the unit load reduction event caused by damage to the sealed fan motor bearing of #4 unit B in a certain factory
1. Operating status before the incident: unit load 335MW, total coal capacity 162t/h, main steam/reheat pressure 17.83/4.0 MPa, main steam/reheat temperature 525/541…
What should I do if the main bearing bush temperature of the ball mill is high in summer?
The main bearing of the ball mill is one of the important components of the ball mill and has an important impact on the operating efficiency of the ball mill. Under high temperature conditions in summer, the main bearing of the ball mill is prone to high bearing temperature. In severe cases...
How to improve the operating reliability of motor bearings? Experience summary!
The content of this article is a very practical summary of experience on how to improve the operating reliability of motor bearings. I hope it will be helpful to your work and study. [Background] Factors causing mechanical or system failure often...
Fluid coupling use and maintenance
1. The function of hydraulic coupling 1 has the performance of slowing down impact and isolating torsional vibration; it can cause a delay time for the motor to start, accelerate slowly, and reduce the mutual collision between parts caused by sudden start...
Damage hazards, phenomena, causes and treatments of steam turbine bearings
1. What are the hazards of turbine bearing loss? Causes damage to the journal, and in severe cases dynamic and static friction may cause damage to the turbine. 2. What is the phenomenon of turbine bearing damage? (1) BEARINGS…
How often should high-speed motor bearings be replaced? Is there any replacement signal?
When the motor runs at high speed, the bearings not only have to run at high speed, but also have to continue to withstand the effects of rotor load and frictional heat. If the bearing status is abnormal, it is not conducive to the temperature rise and vibration control of the high-speed motor rotor...
Application of solid lubrication in port equipment
Solid lubricating materials and technology were first used in aerospace and national defense military. my country began research on solid lubricating materials in the late 1950s. For decades, solid lubrication has been used in the national defense and military industries...
Rolling mill roll bending technology
Roll bending technology and positive and negative bending In strip production, the bending and shifting device is an indispensable part. The bending roller can improve the shape of the strip; the shifting roller is a horizontal movement of the flat roller, which improves the efficiency of the roll and prolongs...
Analysis of the causes of ball mill gear transmission failure
Ball mill is an important grinding equipment in cement, metallurgy, mining, power plants and other industries. The gear pair transmission is an important part of it. Its weight, volume, and cost account for a large proportion of the whole machine. Its work...
Why is the water pump usually installed first when the unit is installed? What is the reason for the pump shaft being connected in series?
Answer: (1) Generally, the water pump is installed first, and then the motor is installed, because the motor is only related to the location of the water pump, while the location of the water pump involves the connection of other equipment and pipelines. (2)a, double…
Are the technical accuracy requirements for double-end bearing grinders high?
The technical precision requirements of the double-end bearing grinder are very high. It is a key precision equipment in bearing manufacturing to ensure product performance and life. To achieve stringent targets, the following links must be strictly controlled:…
Analysis on fault diagnosis technology of rocker gearbox of coal shearer
Wang Xiaopei In order to further improve the operating rate of the shearer in the fully mechanized mining face, considering that the rocker arm gearbox of the shearer is one of the weak links, based on the analysis of the structure of the shearer rocker gearbox,...
Application fields of self-lubricating bearings
The self-lubricating bearing is a novel lubricating bearing that combines the characteristics of metal bearings and oil-free lubricating bearings. The metal matrix bears the load, and the specially formulated solid lubricating material provides lubrication. Widely used in…
Why must industrial equipment use high-strength fasteners?
In fields such as industrial manufacturing, mechanical equipment, wind power energy storage, and automotive heavy industry, fasteners are the most basic and most overlooked core components. Many people think that screws are just simple fixing accessories, ordinary...
Why is there an air gap between the motor rotor and stator?
In order to ensure that the rotor can rotate freely in the stator cavity during the operation of the motor, an air gap must be maintained between the rotor core and the stator core. In this way, although there is no direct electromagnetic connection between the rotor and the stator...
What causes pump vibration? How to eliminate it?
1. Causes of vibration 1. Motor The motor structural parts are loose, the bearing positioning device is loose, the iron core silicon steel sheet is too loose, and the support stiffness of the bearing is reduced due to wear, which will cause vibration. The quality is off…
What are the paired installation forms of angular contact ball bearings?
Angular contact ball bearings are a kind of bearing that can withstand the combined load-bearing capacity in both radial and axial directions. Compared with deep groove ball bearings, they have stronger load-bearing performance. Usually, multiple sets of single-row assemblies or double-row shafts are used...
What are the specifications and types of copper sleeves?
There are many brands of copper sleeves (also called copper bearings or sliding bearings), which can be divided into several categories according to different base materials, alloy elements and performance characteristics. Simply put, the most commonly used copper number package...
How to solve common problems of sizing machines?
Poor drainage of the drying cylinder Phenomenon: Whether it is a new sizing machine or a traditional sizing machine, whether it is an elevated drying room or a floor-standing parallel drying room, the drying cylinder drainage system is prone to failure, and such failures are not common...
The composition and selection of shield machine
1, shield shell The shield shell is composed of notch ring, support ring, steel plate bundle, shield tail and other parts through welding, riveting and bolting. The main functions are: to withstand formation pressure, provide temporary support, and protect equipment...
Effect of impurity elements in steel on material properties
Author: Wu Jia (senior engineer) We often refer to iron-carbon alloys with WC <2.11% as steel. When discussing the structure and properties of steel, we only consider the influence of carbon, but in the steelmaking process, we cannot...
How to use feeler gauges and precautions
1. Basic introduction The feeler gauge, also known as the thickness gauge, is made up of a set of overlapping thin steel sheets of different thicknesses and a section loosely riveted together. As shown in the figure, each piece is engraved with its own thickness value. Inspecting thermal equipment…
How important is debugging after bearing installation?
1. After the bearing is installed, bearing debugging should not be ignored. After the bearing is installed, add the specified lubricant, and then conduct a test run to check whether there is noise and the temperature of the bearing. Test run response…
A brief discussion on the installation method of ball screw
Introduction to the installation method of the ball screw. Because the ball screw is a rolling motion and is more efficient than the sliding screw, the efficiency of converting rotary motion into linear motion and linear motion into rotary motion can reach...
Main points of repair process of reducer in steelmaking converter maintenance
The assembly is divided into two parts, the bearing component assembly and the overall assembly of the reducer. The process of installing gears and bearings is as follows: 1. Assemble in order. When assembling, assemble in order, generally from the middle to the two...
Sliding bearing detection range
What occurs when a sliding bearing works is sliding friction; the size of the sliding friction force mainly depends on the manufacturing accuracy; and the size of the sliding bearing friction force mainly depends on the material of the bearing sliding surface. Sliding bearings generally...
Common faults and troubleshooting methods of drilling rigs
1. Drilling rig failures are divided into five categories: mechanical failure, hydraulic failure, electrical failure, engine failure, and mud pump failure. Mechanical failure: mechanical defects, deformation of fixed parts, transmission parts, etc. Hydraulic...
The function of water pump sleeve
The water pump shaft sleeve is a cylindrical part that is sleeved on the water pump shaft. It seems to have a simple structure, but it plays a key role in the operation of the water pump. Its main functions can be summarized in the following aspects: 1. Protect the pump shaft and reduce...
Should the positioning bearing of a vertical motor be placed at the upper end or the lower end?
Wang Yong Vertical motors and horizontal motors have similar structures in terms of bearings, but the forces are different. It is assumed that there is no axial force or radial force outside the motor. In a horizontal motor, the bearings at both ends bear...
Typical common reasons for burnt positioning bearings in wire rod rolling mills
1, the roller axis crosses horizontally. During the rolling process, the size of the support roller arch window is large or the liner and the surface of the liner are worn, causing the support roller axis to cross in the horizontal direction. During rolling, the roll axis...
Causes of engine cylinder liner wear and lubrication maintenance
Engine cylinder liners and piston rings are a pair of friction pairs that work under high temperature, high pressure, alternating loads and corrosion. Working under complex and changeable conditions for a long time will result in cylinder liner wear and deformation...
How are turbine oil wedges and oil films formed?
1, oil wedge of steam turbine bearings Steam turbine radial support bearings generally consist of bearing sleeves + tilting pads. The rotor shaft diameter of the steam turbine is smaller than the inner diameter of the bearing. When stationary, the journal is located directly under the bearing bush...
Key points for bearing maintenance
01. Bearing maintenance and disassembly procedures ① Remove the instrument probe and other instrument wiring that hinders bearing disassembly. ② Remove the facet bolts and positioning pins in the bearing cover, gently lift the bearing cover with a jackscrew, and then lift it off...
Classification, structure and materials of sealing rings
The sealing ring is also called an oil seal. It is installed at the end of the rotating shaft in the operating equipment to isolate the parts that need lubrication in the transmission parts from the output parts, thereby preventing the leakage of lubricating oil. The editor below introduces to you…
Reasons and solutions for low pressure in the cableway hydraulic system 6
Yaowu Cableway Song Jinlong 1. The hydraulic oil level is too low or the oil quality is deteriorated. Reasons: The oil tank is short of oil and air is exposed at the oil suction port, causing the hydraulic pump to be sucked out and unable to build pressure; the oil appears emulsified and...
How to improve gearbox cleanliness?
The cleanliness of the gearbox is not only related to product performance and life, but also to the reputation of the product, which directly determines the quality of the gearbox product. This article tells you how to do a good job in gearbox management in turbine management...
2026 Analysis of market data of the bearing industry in the first half of the year
According to statistics for 155 enterprise groups and major companies in the national bearing industry, including 144 participating in the summary, cumulative industrial output at current-year prices from January to June 2026 reached 450.3...
A brief introduction to the preparation and implementation of major and medium repair plans for cement plant equipment
Yin Yugang (Shaanxi Fuping Ecological Cement Co., Ltd.) Introduction The purpose of major equipment repair is to repair the equipment that has been damaged due to severe wear, corrosion, fatigue deformation and other reasons of equipment reference parts during long-term use...
Troubleshooting for hydraulic excavator that cannot rotate
An excavator has been operating for more than 15,000 hours. It is currently malfunctioning and cannot turn left or right at all. Except for rotation, other actions are normal, which means that the working pump should be normal. We go from easy to difficult...
Galvanizing, phosphating, blackening, how to choose the surface treatment process of fasteners?
Choosing which surface treatment to use is a problem faced by every designer. There are many types of surface treatments to choose from. A high-level designer should not only consider the economy and practicality of the design, but also pay attention to...
Application of linear motors in machine tool industry
In the current era of rapid iteration of intelligent manufacturing, the performance of machine tools, as industrial master machines, directly determines the processing accuracy and production efficiency of the manufacturing industry. Traditional machine tools rely on “rotating motor + ball screw”…
[Popular Science] How to identify the authenticity of lubricating oil?
With the growth of China's automobile production and sales, the lubricant market has shown huge business opportunities, and some unscrupulous traders and manufacturers have also started to make counterfeit lubricants. If car owners use inferior engine oil, they will not only affect their development...
Vibration standards for various types of equipment
The type of equipment, installation method and driving method (rigid connection, belt drive, gear drive, etc.) are taken into consideration. It is not intended to establish standards for overhaul or newly installed equipment, but to evaluate already installed...
Fault diagnosis and treatment of cold acid rolling mill bearings
Liu Aijun1 Xiao Fuying2 (1. School of Mechanical and Electrical Engineering, Hunan University of Science and Technology; 2. School of Mechanical and Electrical Engineering, Central South University) Abstract: By measuring the abnormal conditions of bearings on the cold acid rolling mill steel strip production line...
Main engine high-pressure oil pump coupling damage failure
Typical Cases Recently, the Chongqing Banan Maritime Affairs Department received a report that a ship in its jurisdiction had insufficient left main engine power while going up the beach in the Chicken Wing waters, and applied for maintenance outside the Huangxikou waterway. After receiving the report, law enforcement...
Analysis of low oil pressure on the top shaft of the #7 bearing in a power plant main engine
1, accident history: A factory's steam turbine was started, and when the tray truck was running, #7, the oil pressure of the bearing jacking shaft was 9Mpa, but the pressure showed a decreasing trend after the punching. Although four jacking oil pumps were turned on (three were originally running...
Using stable flow chamber V-shaped mixer technology to solve the problem of roller deflection in roller presses
Author: Shen Xirong 1 Advantages of the roller press system As a high-efficiency and energy-saving grinding equipment, the roller press has been widely used in the grinding of raw materials and cement. The roller press combined grinding system is a national key...
Renovation of slip ring shell of coal mill high voltage motor
Li Fushu The protection level of the slip ring shell of our company's high-voltage wound asynchronous motor is IP23. In order to meet the heat dissipation needs of the slip ring and facilitate inspection, the access door of the slip ring shell is often opened, which results in coal...
The whole process of machining center spindle abnormal noise and vibration fault diagnosis - from "listening to identify the position" to precise troubleshooting
The spindle is the heart of the machine tool, and clues to 90% of shutdown failures can be found in the sound. In a machining shop, the spindle of the machining center is the veritable "heart". It drives the cutter every minute…
Three-phase asynchronous motor journal wear and bearing overheating treatment methods
Journal wear and bearing overheating in three-phase asynchronous motors are two of the most common but related mechanical failures. Journal wear is often caused by bearing overheating, improper installation or lubrication failure...
Summary of causes of oil leakage in planetary reducers
1, the pressure in the fuel tank rises. In a closed planetary reducer, each pair of gears meshes and generates heat due to friction. According to Boyle's Law of Maliot, as the operation time increases, the planet decreases...
A brief discussion on the causes, hazards and treatment methods of hydraulic oil water intrusion
In today's rapid industrial development, hydraulic systems are widely used in industrial fields as driving or lubricating devices; however, the problem of water intrusion into the working medium of hydraulic systems is often not easy to find or is most easily discovered...
Axial displacement measurement principle and installation and debugging steps
In the steam turbine TSI (turbine monitoring instrumentation system), the core of axial displacement measurement is to monitor the position changes of the rotor along the axial direction in real time through non-contact sensors to prevent thrust bearing wear and other causes...
Spindle axial runout and radial runout and solutions
1. Explanation of terms&Accuracy requirements (reference) 1, glossary: Radial runout: Radial runout refers to the runout in the diameter direction of the equipment shaft. Axial runout: Axial runout is in the shaft...
Give you several reasons to choose polyurethane seals
Polyurethane seals are one of the most versatile and durable materials used in fluid dynamic seals, such as pump shaft seals and hydraulic cylinder piston and piston rod seals. There are many chemical formulas for this material, so it can...
Is there any abnormal noise in the suppressor wheel bearing? Don’t rush to change it yet, check it in three steps
During the working season, abnormal noise from the wheel bearings is one of the top three problems in after-sales inquiries. Don't rush to report for repairs or replacements. You can solve half of the problems by yourself through self-examination in three steps: The first step is to identify the location by listening to the sound. Idling…
How to change the lubricating oil of hard tooth surface reducer?
The hard tooth surface reducer, as you can tell from the name, is to reduce the speed of the equipment when it is running. It can ensure that it is at a relatively slow speed, because it also needs to rotate, so when using it...
Peristalsis mechanism of rolling bearings
Peristalsis in the opposite direction to rotation Soda describes the 2 kind of ring peristalsis mechanism that is opposite to the direction of bearing rotation. 2 The better understood peristalsis in this mechanism consists of the bearing ring and the matching shaft or bearing seat...
25 digital tips for device management
1, three principles for equipment selection: technically advanced; economically reasonable; suitable for production 2, equipment management three-level network system: Level 1: company level; Level 2: workshop level; Level 3: team level 3, design…
Analysis and solutions to common faults of CNC machine tool spindles
Fault phenomenon (1) - Spindle heating (1) The preload force of the spindle bearing is too large, causing excessive friction when the spindle rotates, causing the spindle temperature to rise sharply. The spindle bearing preload can be re-adjusted...
Lubrication operating specifications and maintenance of plate chain and roller chain
Xue Hongbo (Xinfei Freezer Learning and Improvement Platform)…
Detailed explanation of the main causes and solutions of oil seal leakage
Oil seal is a mechanical component used to seal oil (oil is the most common liquid substance in the transmission system, and also generally refers to general liquid substances). It isolates the parts that need lubrication in the transmission parts from the output parts,…
Selection of sliding bearing lubrication methods
(Source: Machine Fault Diagnosis and Life Cycle Management)…
Bearing temperature expansion: How do temperature changes quietly change fit and clearance?
Rolling bearings are often made of quenched steel and are usually mounted on steel shafts with a press fit (interference fit). However, in actual working conditions, bearings often operate in environments much higher than room temperature. Temperature changes can cause bearings, shafts,...
A brief discussion on noise control in cement factories
Zhang Hongsong [China Sinoma International Engineering Co., Ltd. (Nanjing)] 01 Introduction Noise interferes with and damages human hearing, sleep, and emotions, which is extremely harmful. To prevent and control noise pollution,…
How to choose tolerance level? Is the higher the better?
Tolerance level refers to the level that determines the degree of dimensional accuracy. The national standard stipulates that it is divided into 20 levels. The larger the number, the lower the tolerance level (processing accuracy), and the larger the allowable variation range (tolerance value) of the size...
Axle box devices for railway rolling stock
The axle box device is a component installed on the railway rolling stock and sleeved on the axle neck to connect the wheelset and the bogie frame or the two-axle car body. It is referred to as the axle box. The axle box of a railway vehicle is installed on the outside of the wheel, and a steam locomotive...
Axial piston pump failure analysis
The hydraulic pump is the power component of the entire hydraulic system. It converts the mechanical energy of the prime mover (electric motor, internal combustion engine) into the pressure energy of oil, providing oil with a certain flow rate and pressure for the hydraulic system. Axial…
Application analysis of oil and gas lubrication technology for rolling mill work roll bearings
Xia Cuili1 Zhao Guangyu2 Huang as 3 (1. Liaoning University of Science and Technology, Benxi, Liaoning, 117002; 2. Benxi Iron and Steel (Group) Company Cold Rolling Plant, Benxi, Liaoning, 117000; 3.…
Typical fault repair of CNC machine tools
Abstract: CNC machine tools are electromechanical automation equipment commonly used in the current manufacturing industry. Because of their high production efficiency, they are used in practical production by all walks of life. But this kind of technology content is high, and electromechanical has...
Industrial robot linear drive mechanism
1. Gear rack and pinion device Usually, the rack is fixed. When the gear is driven, the gear shaft and the carriage make linear motion in the direction of the rack. In this way, the rotational motion of the gear is converted into the linear motion of the carriage...
Optimization and transformation of grinding mill slipper lubricating oil station
Wang Yanhua (Jiangshan Nanfang Cement Co., Ltd.) Abstract: The pipelines and valve settings of the slipper oil station of two Φ4.2m×13m mills have great safety hazards and operational inconveniences,…
Application and development of papermaking machinery condition monitoring and fault diagnosis technology
Abstract: At present, my country has introduced a large number of high-speed, wide-width, and highly automated papermaking machinery and equipment. However, after long-term operation, various types of equipment failures will inevitably occur, affecting the normal operation of the equipment. …
Analysis on refined management of cement plant equipment management
Qian Chengquan The cement industry is a typical process manufacturing industry. Equipment is the core carrier of production operations. The operating status of key equipment such as rotary kilns, cement mills, raw material mills, and grate coolers directly determines production...
Screw air compressor cleaning and maintenance methods and procedures
In practical applications, the working environment of air compressors is often complex, with dust, oil and various particulate matter. After the air compressor has been used for a long time, there will be oil dirt, carbon deposits, sediments, rust, etc. inside. If...
Core performance of diaphragm coupling and claw coupling
Core performance comparison between diaphragm coupling and claw coupling: 1. Transmission accuracy: diaphragm coupling has zero backlash, high rigidity, precise transmission without lag, suitable for servo and precision machine tools; claw type relies on elastomer transmission...
What are the methods for deburring parts?
Burrs are everywhere in the metal processing process. No matter how advanced precision equipment you use, it will be born together with the product. It is mainly caused by the plastic deformation of the material and occurs at the edge of the processed material...
The formation of gear pitting corrosion is related to the selection of lubricant
Gears are subject to periodically changing contact stress during operation. When the contact stress exceeds the contact fatigue strength of the material, fatigue cracks will occur on the gear surface or subsurface layer. Fatigue cracks continue…
How to choose deep groove ball bearings? Systematic review from structural characteristics to engineering selection
Deep groove ball bearings are the most widely used type of rolling bearings, but early failures caused by incorrect selection are not uncommon at engineering sites. This article starts from the structural characteristics, sorting out code reading, load and speed verification,...
How to adjust the concentricity of the coupling?
The operation is as follows for rough adjustment: 1, unscrew the four fastening bolts of the coupling protective cover, and remove the protective cover; 2, turn the coupling by hand, and observe whether the front and rear couplings are level and whether there is any shaking...
Why does screw compressor consume so much lubricating oil?
If the compressor runs out of oil, it will not only contaminate post-processing equipment, such as dryers and precision filters, but will also affect product quality and cause varying degrees of damage to certain production equipment. Therefore, we need to master...
Applications and precautions for super nuts and super bolts
1. The composition of the super nut. The super nut is also called a multi-stage push nut. It consists of a center nut, a push bolt with a circle of small satellite bolts around it, and a hard washer, as shown in the figure 1…
Heat treatment basic questions and answers
1, What is heat treatment? A process in which solid metal or alloy is heated in an appropriate way, kept warm for a certain period of time, and cooled at a certain cooling rate to change its structure, thereby obtaining the required properties...
Status identification of rolling bearings during operation
Identification of rolling bearing operating status: As a measurement parameter that indicates early faults, the demodulation spectrum, combined with the speed spectrum, is the key to determining bearing faults. The development process of rolling bearing failure is divided into 4...
Adjustment method of bearing radial clearance
The commonly used methods for adjusting the radial clearance of bearings are as follows: 1. The side clearance of cylindrical and elliptical bearing bushes can be adjusted by manual scraping or by scraping after turning the middle part of the bearing with a pad. 2, to the cylinder…
Oil lubrication of rolling mill bearings
The lubrication of bearings uses oil films to separate relatively moving rolling surfaces from each other to prevent excessive wear and failure due to rough point contact. If users can attach great importance to bearing lubrication technology, they can ensure that...
A brief discussion on failure analysis of wind power gearboxes
Wind power gearbox is one of the core components of wind power equipment. Each gear in the gearbox is a heavy-duty gear. The main components are gears, bearings and other components. They are relatively uncomplicated...
Scrap standards and overhaul of crane pulley blocks
A pulley is a small grooved wheel that rotates about an axis. A grooved disc and a flexible element (rope, belt, steel cable or chain) form an assembly that rotates about its center...
Three connection methods between water pump shaft and electric motor
1. Fixed connections Fixed connections are becoming increasingly common. In this arrangement, there is no coupling between the shafts of the water pump and the motor; the water pump casing is flange-mounted and installed between the motor and water pump with a tight-fitting clearance...
Common fault diagnosis and maintenance measures for variable frequency motors
1 Characteristics of variable frequency motors 1.1 Electromagnetic design For ordinary asynchronous motors, the main performance parameters considered when designing variable frequency motors are overload capacity, starting performance, efficiency and power factor. …
Causes of flange seal leakage
Flange sealing generally relies on the pretightening force generated by its connecting bolts, through various solid gaskets (such as: rubber, asbestos rubber gaskets, plant fiber gaskets, wound metal-filled asbestos gaskets, corrugated...
A brief analysis of noise and vibration control of passenger ropeway machinery and equipment
Author: Xu Zijian Abstract: As a modern and efficient means of transportation, the passenger ropeway has the advantages of large transportation capacity and low emissions. However, the noise and vibration generated by the passenger ropeway mechanical equipment...
Factors to consider when choosing oil or grease lubrication
Factors to Consider When Choosing Oil or Grease Lubrication…
What is the reason for the wear of the large gear of the ball mill?
1. Gear hardness and gear end face sealing are poor. The hardness of the large gear of a ball mill is generally guaranteed to be above HB300, and the tooth surface hardness of the pinion is above HRC45. However, in the actual production process...
Debugging the dynamic balance of the spindle
All rotating machines, no matter how designed and manufactured, generate vibration during operation. Excessive vibration will shorten the service life and even cause damage to the machine. When excessively vibrating components interact with other equipment…
Installation method of snake spring coupling
Any time the coupling is disassembled, the cover and grille need to be removed. A round metal rod or screwdriver is a handy tool for removing grilles. 1. Half coupling installation. 2.Adjust the gap between the two halves of the coupling...
Which technology would you choose if the motor spindle is worn?
Keywords: motor spindle wear; online repair; carbon nanopolymer materials. Recently, the main shaft bearing of a 750KW motor in a certain chemical industry has a wear problem, and the unilateral wear depth is 0.…
Grinding wheel arc dressing device
Ma Shujun (Qizhong CNC Equipment Co., Ltd.) For grinding machines, the grinding wheel dresser is an essential accessory. There are many forms of grinding wheel dressing. Common ones include diamond roller forming dressing,...