Gear pumpIt is common for bearings to fail during operation, so there is no need to make a fuss.In the event of a failure, judgment and handling are the key.Today, Luzhou gear pump manufacturers will explain the causes of common bearing failures.

   1. Bearing temperature is too high: When the mechanism is running, the part where the bearing is installed is allowed to have a certain temperature. When touching the housing of the mechanism with your hands, it is normal that you do not feel hot, otherwise it indicates that the bearing temperature is too high.

   The reasons for the excessively high bearing temperature include: the quality of lubricating oil does not meet the requirements or deterioration, the viscosity of lubricating oil is too high; the mechanism assembly is too tight (insufficient clearance); the bearing assembly is too tight; the bearing race rotates on the shaft or in the housing; Large; the bearing cage or rolling elements are broken, etc.

   2. Bearing noise: Rolling bearings are allowed to have a slight running noise during operation. If the noise is too loud or there is abnormal noise or impact, it indicates that the bearing is faulty.

   The cause of noise produced by rolling bearings is more complicated, 1) the mating surfaces of the inner and outer rings of the bearing are worn out.Due to this kind of wear, it destroys the matching relationship between the bearing and the housing, and the bearing and the shaft, causing the axis to deviate from the correct position, causing abnormal noise when the shaft is moving at high speed.When the bearing is fatigued, the metal on its surface will peel off, which will also increase the radial clearance of the bearing and produce abnormal noise. 2) Insufficient bearing lubrication, formation of dry friction, and bearing breakage will cause abnormal noise. 3) After the bearing is worn and loosened, the cage is loosened and damaged, which will also cause abnormal noise and damage to the bearing.When the rolling bearing is disassembled and inspected, the fault and the cause of the damage can be judged according to the damage of the bearing.

   3. Metal peeling on the surface of the raceway: The rolling elements of the bearing and the raceway surfaces of the inner and outer rings are subjected to periodic pulsating loads, resulting in periodic contact stress.When the number of stress cycles reaches a certain value, fatigue spalling occurs on the working surfaces of the rolling elements or inner and outer ring raceways.If the bearing load is too large, this fatigue will be aggravated.In addition, if the bearing is installed incorrectly and the shaft is bent, the raceway will peel off.Fatigue spalling of the bearing raceway will reduce the running accuracy of the shaft and cause vibration and noise to the mechanism.

   4. Bearing burn: burnt bearing has tempering color on raceways and rolling elements.The causes of burns are generally insufficient lubrication, the quality of the lubricating oil does not meet the requirements or deterioration, and the bearing assembly is too tight.

   5. Plastic deformation: uneven pits appear on the contact surface between the raceway and the roller of the bearing, indicating that the bearing is plastically deformed.The reason is that the local stress on the working surface of the bearing exceeds the yield limit of the material under the action of a large static load or impact load. This situation generally occurs on a bearing that rotates at a low speed.

   6. Bearing race cracks: The reason for the cracks in the bearing race may be that the bearing is too tightly fitted, the bearing foreign or inner ring is loose, the bearing housing is deformed, and the surface where the bearing is installed is poorly processed.

   7. The cage is broken: the reason is insufficient lubrication, broken rolling elements, skewed seat ring, etc.

   8. The metal of the cage adheres to the rolling elements. The possible cause is that the rolling elements are stuck in the cage or insufficient lubrication.

   9. The raceway of the seat ring is severely worn: it may be caused by foreign matter falling into the seat ring, insufficient lubricating oil or improper lubricant brand.