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 the high temperature conditions in summer, the main bearing of the ball mill is prone to high bearing bush temperature. In severe cases, a bushing accident may even occur, which will not only affect the operation of the ball mill, but even affect the operation of the entire mineral processing plant. In this article, we will discuss how to solve the problem of high temperature of the main bearing bush of the ball mill.
1, timely replacement of ball mill lubricating oil
During ball mill operation, friction from relative rotation between the hollow shaft and bearing shell generates heat and raises the main bearing temperature. Changing the lubricating oil can therefore reduce friction and form a uniform oil film on the bearing surface, helping prevent a rise in main bearing temperature. The lubricant film is closely related to temperature and strongly affected by temperature changes. During ball mill inspections, check the lubricating oil condition promptly and conduct regular laboratory tests. Replace the oil promptly when its viscosity falls outside the permitted range.
2, adjust ball mill cooling water and cooling device
Ball mill cooling is very important. The cooling water in the main bearing sleeve and the water in the main bearing oil tank cooler are the two main water sources for the main bearing of the ball mill. The temperature and volume of the cooling water have a great influence on the temperature of the main bearing of the ball mill. When the cooling water temperature is low, the lubricating oil cools down quickly and the cooling effect is good. Increasing the cooling water flow will also reduce the temperature of the main bearing bush.
In actual production, attention should be paid to reducing the cooling water temperature as much as possible and increasing the cooling water flow rate. At the same time, attention should be paid to timely cleaning of the cooler, cooling water pipelines and large tile water jackets, so that the cooling water and lubricating oil can fully exchange heat and increase the cooling efficiency.
3, improve the environmental conditions of the ball mill
The temperature of a ball mill is strongly affected by its surroundings. High summer ambient temperatures also raise bearing-shell temperatures. Open the doors and windows of the mill building and oil-pump room, together with the main bearing inspection openings, to improve ventilation, lower the lubricating oil temperature, and thereby lower the ball mill's main bearing-shell temperature. Where conditions permit, axial-flow fans can also be installed in the oil-pump station to increase air circulation and cool the lubricating oil. Water sprays can also be added to the oil return and supply pipes to reduce temperature.
4, increase the oil pump cooling area
The cooler in the ball mill oil pump can be reselected, or the cooler can be connected in series to increase the cooling area of the ball mill lubricating oil, improve the heat exchange effect of the ball mill lubricating oil, and reduce the temperature of the lubricating oil fed to the ball mill, thereby reducing the bearing temperature.
The above are measures to improve the temperature of the main bearing bush of the ball mill in summer. In actual production, the situation is complex and changeable. It is necessary to regularly check the working status of the ball mill and take timely adjustment measures to avoid malfunction of the ball mill due to excessive temperature in summer and ensure stable and efficient operation of the ball mill.
(Source: Shandong Xinhai Mining)