The emergence of TIMKEN bearing deformation overhaul plan

Rolling bearing or component due to the force change size or shape is called deformation. The scene of the production machinery and equipment because of the bad working conditions, are often overloaded operations, some bearing deformation is very common. Their deformation will lead to accelerated wear and other related parts and even rupture, and may lead to system series TIMKEN bearing damage or damage to the device, caused the accident, so the harm of deformation is quite serious. At full load and overload of machinery and equipment for a long time, the temporary load rate already exceeds the provisions of the factory design index, lead to deformation of the bearing. Steel rolling workshop finished products across the bridge crane, for example, temporary load rates tend to be more than 70%, part bridge girder downwarping bend, and lead to deformation of car body and the four wheels running, screeched friction scream. Overhaul disassemble the bearing, the first record bearing appearance, confirm the residual stock of lubricant, after sampling, clean the bearing. Cleaning agents commonly used gasoline, kerosene. Tear open come down to the TIMKEN bearing cleaning, rough washing and fine washing, metal mesh is put in container first, don't direct contact with dirt from the container. Rough washing, if bearing with dirt, can damage the bearing rolling surface, should be pay attention to. Wash the oil in the coarse, use a brush out grease, adhesion, basic clean, into fine cleaning). Fine cleaning, bearing side rotation in the cleaning of oil, while carefully cleaned. In addition, often cleaning oil will change kept clean. Judgment can remove the TIMKEN bearing again when used in bearing inspection after cleaning, carefully check the raceway surface, rolling surface, cooperate with the state, the abrasion of cage, rolling bearing clearance whether to increase, and presence of falling damage, abnormal size precision. Non separation of small ball bearings, etc. , the inner ring with one hand flat end, rotate the outer ring confirm whether smooth. Tapered roller bearing separation type 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 and guard surface appearance, bearing the importance of the higher, the need to be careful to check. Rolling bearing in the applied stress is less than the material yield strength when the deformation is called elastic deformation. Plastic deformation, also known as permanent deformation, is refers to the TIMKEN bearing parts in the external force ( Load) After removing, cannot recover part of the deformation. Excessive deformation is an important type of machinery and equipment failure. For example, the bridge crane girder, new purchase and install all have a certain amount on the arch. After put into production use five or six years, especially the use of high frequency conditions, its main girder arch will disappear. According to the requirements of enterprise safety procedures, the crane can't continue to use, repair should be performed to eliminate the deformation of main girder downwarping. Transmission system in some complicated shape and high position accuracy of, measurement and calibration are relatively difficult fundamental components, their deformation will cause a chain reaction. Mill, for example, the main reducer box body in a column presents the micro deformation, if the position of the shaft will affect the high or low speed, the position of the center distance of the gear reducer, external coupling, gear meshing and so on. It is conceivable, if these key parts change, will inevitably cause vibration and noise, wear, temperature rise, even broken teeth and accident.