Thrust ball bearing noise inspection judgement for maintenance

In order to judge whether the bearing of the removed can be used again, check after wash thrust ball bearing. Carefully check the raceway surface, rolling surface, cooperate with the state, the abrasion of cage, the increase of the bearing clearance, and presence of dimensional precision falling damage, abnormal. Non separation of small ball bearings, with one hand will support level, the inner ring spinning confirm whether smooth outer ring. Separation of tapered roller bearings and bearing, rolling body, the outer ring raceway surface can be respectively. Large bearing can't rotate with the hand, pay attention to check the rolling element and raceway surface, cage, guard surface appearance, such as the importance of bearing high must check carefully. Whether can be used to judge, is to consider the thrust ball bearing damage degree, mechanical properties, importance, and operating conditions, to the next overhaul period. But, if you have the following defects cannot be used again. Must change new bearing. TIMKEN bearing manufacturing factors of noise although is essentially due to the manufacturing error, but in fact still with the choice of lubricant, bearing installation conditions, the accuracy of the state of the shaft and bearing seat. This noise and divided into two categories, maintains a sound sound and vibration lines, points above are as follows: ( 1) Maintains a sound maintains a sound and its control method is refers to the impact of severe vibration of the cage and rolling element and a cyclical vibration and noise, in pocket Kong Song and friction was easy to appear. This noise occurs mainly in ball bearings and thrust ball bearings, and punching cage and entities cage will occur, when the use of grease or oil lubrication will happen, but when bad lubrication or lubricant used, big radial clearance, outer torque under load, and keep the bad frame structure and the precision is not high, the more likely to occur, serious when maintains a web or rivet head suddenly fracture. A bracket will be control methods of noise and vibration; Use the lubricant lubrication good performance; Reduce the installation error of bearing, Compression bearing radial clearance or is properly, axial preload and choose with good precision structure reasonable TIMKEN bearing cage, or switch to keep strong and without wear of bearing. ( 2) Grain noise and its control method of vibration marks is directly related to the TIMKEN bearing rolling surface waviness of noise, the noise is a kind of pure tone, for constant speed, its frequency is constant, with the speed of change, and the changes of its frequency.