What are the reasons for overheating of screw bearings?
Lubrication has an important impact on the service life of the TIMKEN bearing and friction, wear, vibration, etc. Good lubrication is a necessary condition to ensure the normal operation of the bearing. According to statistics, about 40% of bearing damage is related to poor lubrication. The factors that usually cause poor lubrication of bearings are: insufficient lubricating oil (grease), the lubricating oil pipe is blocked by foreign matter, etc., the quality of lubricating oil (grease) is problematic, and the lubricating oil (grease) and lubricating oil (grease) are not added on time. Contains impurities, etc.
Bearings, as an important part, are used in various large and small machines. Some machines work in an open air environment, and when there is a lot of dust, part of the fine dust is easy to enter the high-speed bearing housing, causing the lubricating oil or grease in the bearing housing to deteriorate. , Poor operation, and then wear and tear on the bearing. Bearings continue to run in a worn state, due to increased friction and heat increase, resulting in an increase in the temperature of the bearing.
Improper installation is another important cause of bearing heating. Because the bearing is installed correctly or not, it has a direct impact on its life and the accuracy of the host, so the center line of the shaft and the bearing hole must be coincident during installation. If the bearing is installed incorrectly, the accuracy is low, and the bearing has deflection, torque will be generated during rotation, which will cause the bearing to heat up or wear. In addition, the bearing will generate vibration, increase the noise, and increase the temperature rise.
Insufficient cooling is usually manifested as: pipeline blockage, inappropriate selection of cooler, poor cooling effect, etc. The fouling and blockage of the cooler of the lubrication pipeline will cause the cooling effect to deteriorate, especially in summer production. The cooler has serious fouling and frequent alarms for excessive bearing temperature are encountered in many production sites. A more effective solution is to pickling and descaling the cooler before the beginning of summer each year.
If the bearing is found to be severely fatigued, peeling, oxidized, rusted, worn pits, cracks, or excessive noise that cannot be adjusted, if it is not replaced in time, it will cause the bearing to generate heat, abnormal noise, vibration, etc., which will affect the normal produce.
Bearing parts work for a long time under high alternating contact stress in the form of point contact or line contact. The accuracy, life and reliability of the main engine are largely determined by the bearing. Therefore, it is necessary to pay attention to the inspection during the purchase and acceptance of the bearing, and use qualified and high-quality products from regular manufacturers.