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 32#, 46#, and 68#.
Hydraulic oil model
Hydraulic oil is a general term. Anti-wear hydraulic oil is developed on the basis of anti-rust and anti-oxidation hydraulic oil. Hydraulic oil is divided into HH (pure mineral oil)/HL (anti-oxidation and anti-rust)/HM (anti-wear)/HV (low temperature)/HS (low condensation) and other categories. Nowadays, commonly used hydraulic oils are basically HL/HM type.
Anti-wear hydraulic oil is mainly used in heavy-load, medium-pressure and high-pressure hydraulic systems to ensure that the friction pairs in oil pumps, hydraulic motors, control valves and cylinders are properly lubricated and reduce wear under high-pressure, high-speed and harsh conditions. It can quickly separate the moisture mixed into the oil to prevent metal surface corrosion.
Main uses of hydraulic oil
1. Anti-wear hydraulic oil is mainly used in hydraulic systems of heavy-duty, medium-pressure and high-pressure vane pumps, plunger pumps and gear pumps such as YB-D25 vane pumps, CBN-E306 gear pumps, PF15 plunger pumps and YB-E80/D40 double pumps and other hydraulic systems.
2. Hydraulic systems for medium pressure, imported equipment/vehicles, and high-pressure construction machinery. Such as tunnel boring machines, computer numerical control machine tools, crawler cranes, shearers and hydraulic backhoes and other equipment's hydraulic systems.
3. In addition to being used in medium and high pressure hydraulic systems of various hydraulic pumps, it can also be used for the lubrication of medium load industrial gears (except hyperbola gears and worm gears). The applicable ambient temperature of anti-wear hydraulic oil is minus 10℃-40℃, and it has good adaptability with nitrile rubber.
Product parameters and applications
The difference between ash and ashless hydraulic oil
Anti-wear hydraulic oil additive systems are divided into gray (zinc) formulas and ashless formulas.
1, gray type
Zinc-containing main agent, ZDDP, zinc dialkyl dithiophosphate, the standard is based on the zinc content in the oil 0.03%.
2, grayless type
Contains no zinc. The advantage of the ashless type is that it does not contain zinc and will not react with silver-bearing parts.
Because many parts such as valves are made of silver-plated materials, the zinc element will react with the silver during electroplating to displace the silver and damage the parts. But if you use ashless anti-wear hydraulic oil, this problem will not occur, because ashless anti-wear hydraulic oil does not contain zinc, so it will not react with silver and damage components.
Hydraulic oil replacement time
There is no specific time for replacing hydraulic oil. Many people will not consider replacing it until the equipment is worn out. It is recommended that companies with high-precision oil filters run them online and perform an online cycle every two or three months, so that the hydraulic oil can always be kept clean.
1, visual oil change method. It is based on the experience of maintenance personnel and based on visual inspection of some regular changes in the oil state - such as the oil turning black, smelly, turning milky white, etc., to decide whether to change the oil.
2, regular oil change method. According to the environmental conditions and working conditions of the site where the equipment is located and the oil change cycle of the oil used, replace it when it is due. This method is very suitable for companies with many hydraulic equipment.
3, sampling assay. Regularly sample and test the oil in the hydraulic press to determine necessary items (such as viscosity, acid value, moisture, particle size and content, corrosion, etc.) and indicators. Compare the actual measured value of the oil quality with the prescribed oil deterioration standards to determine whether the oil should be replaced.
(Source: Internet)