What are the specific reasons for the heat of the crusher bearing?

Crusher is a kind of equipment that crushes materials in the form of impact. It is divided into single-rotor crusher and double-rotor crusher. The specific reasons for bearing heating include: when assembling the crusher, the outer ring of the bearing and the hole of the bearing seat or the bearing and The inner ring of the shaft was not properly matched. During the assembly process of the crusher, the inner hole was not repaired, and its size was measured, and a new bearing was replaced for assembly. After testing, it was found that the temperature rise was too high. When disassembling the measurement results, it was found that the bearing seat hole had been deformed, thereby squeezing the outer ring portion of the bearing, resulting in a smaller radial clearance of the bearing, uneven rolling of the rolling elements and increased wear.

The gap between the inner ring of the bearing and the shaft is too large, the inner ring of the bearing rotates with the rolling element and the shaft, and the frictional force causes the bearing to heat up and vibrate. During the assembly process of the crusher, the heating temperature of the bearing is not properly controlled. During the heating operation , If the temperature of the bearing heater is set too high, it will cause tempering and reduce hardness and accuracy, which will increase the bearing temperature and cause bearing wear and damage.

When assembling the crusher, the bearing clearance is not properly adjusted. In actual work, many installations are sometimes debugged only by feeling, and the clearance is too large or too small to meet the production needs. If the axial clearance is too small, it is easy to cause the bearing to heat up, accelerate pitting corrosion, and even cause the rolling elements to be stuck or glued to damage. resulting in running, abnormal sounds and may even cause violent vibrations or damage the cage

The oil seal is a sealing element used to seal the rotating shaft of the mechanical equipment of the crusher. The cavity is basically fixed, so the oil seal is also called the rotating shaft lip seal. For oil seals with auxiliary lip, the auxiliary lip plays a dustproof role to prevent the intrusion of impurities and prolong the service life of the oil seal, but the auxiliary lip is poorly lubricated and the friction force is large, resulting in damage to the dry seal oil seal, so ensure that the oil seal is filled between the two lips. grease.