Working clearance is an important quality index of rolling bearing and an important parameter in bearing application. In practical use, the working clearance of bearings will affect the load distribution, vibration, noise, friction torque and life of bearings. Improper working clearance of bearings will cause harm to equipment.
(1) The working clearance of the bearing is too small.
If the working clearance of bearings is too small, the friction torque of bearings will be increased, resulting in a lot of heat, which is easy to cause heat damage of bearings. This is because, when the working clearance of the bearing is too small, it will lead to poor lubrication of the rolling body of the bearing and the inner and outer ring of the bearing. Due to dry friction, a lot of heat is generated, resulting in wear, cementation, swelling and other phenomena of the inner and outer ring of the bearing, which will cause bearing damage.
(2) The working clearance of the bearing is too large.
The working clearance of bearings is too large, mainly caused by the selection of too large natural clearance of bearings, bearing compression force is not enough. For example: in the high-speed operation of the reducer, when the natural clearance of the bearing is large, leading to relatively large working clearance, which will cause the reducer in the process of running the vibration is large, reduce the service life of the bearing.