Move the bearings or components due to power changes in size or shape of the phenomenon known as deformation. Machinery and equipment production site because of the harsh conditions premise, often overload operation, some bearing deformation is very common. Their deformation will make other parts accelerated wear, and even rupture, may also lead to the system series bearing damage or equipment damage caused by equipment accidents, so the dangers of deformation is quite severe. At full capacity for a long time, overworked machinery and equipment, the duty cycle has already gone beyond the delineation of indicators factory design, leading to bearing deformation. For example, the duty cycle of the finished rolling shop across the bridge crane is often more than 70%, flexible curved the bridge main beam department, and the wheels of deformation of the body and the four corners, issued a harsh unpleasant friction screams.
Inspection remove the bearing, the first to record the appearance of the bearing, confirm the remaining amount of lubricant, and after sampling, cleaning bearings. Cleaning agents commonly used in gasoline, kerosene.
Remove the bearing cleaning stars rough wash and wash fine metal mesh is first put in the container, so that the bearing does not directly contact the dirt container. Rough cleaning, If bearings with dirt rotating, will damage the bearings move surface, should take note of. Crude oil washing, using a brush out grease, adhesive material, basic clean transferred sperm washing.
Sperm washing is the bearing while rotating in the cleaning oil, clean it thoroughly. In addition, cleaning the oil also replaced often to keep clean.
Determine the the removed bearing the possibility of further use, after bearing cleaning inspection, carefully check the raceway, immobile face, with the surface state, cage wear, to move bearing clearance and whether the impact of the decline in dimensional accuracy injury, abnormal. Non-separation of small ball bearings, inner ring with the flat end of the one-handed rotating outer ring to confirm whether smoothly.
Tapered roller bearings are separable bearings, can move the body, the outer ring raceway were examined.
Large bearing rotated by hand because they can not pay attention to check the body move, raceway, and the cage wall surface appearance, bearing the importance of higher need careful and precise examination.
Move the bearing deformation generated in the role of stress is less than the material yield strength is called elastic deformation. Plastic deformation, also known as permanent deformation refers to deformation of the bearing parts can not be restored after removal of the external force (load), that sector. Excessive deformation is an important type of mechanical equipment failure. For example, the main beam of the bridge crane, installation of the new share, there is a certain amount of the upper arch. Put into use after five or six years, especially when using higher frequency conditions, the main beam arch will disappear. Enterprise safety code requirements, the crane can not inherit, should overhaul to eliminate the main beam torsion deformation. The transmission complex shape, the mutual positional accuracy requirements, measurement and calibration of the basic components of the comparison problem, the deformation will cause a chain reaction. For example, the main reducer box in the mill column thrown trace deformation will affect the position of the high and low speed shaft from the reducer central, the external position of the coupling, gears meshing. You can imagine, these parts of the hub change, will cause vibration, noise, wear, temperature, and even broken teeth on incidents.