1. On the surface, this is the external load caused by the cyclic deformation of the contact surface of the plastic surface of the Koyo bearing during the rolling contact, and finally the development of small cracks. The inner surface, the formation of surface cracks between the two, due to the intrusion of lubricant into the working surface, the open force, severely hit the wall, forcing the crack to advance;
2, from the surface layer, repeated pressure, surface contact, initially cracked cracks at the surface where the surface is exposed, and the angle along the surface direction, to a certain depth, from the surface of the contact surface, and beyond The surface, and eventually formed an eclipse, leaving a horse pit.
From the surface of Koyo imported bearings, or from the cracks in the surface layer, these two objectives (parts carburizing, quenching and other surface heat treatment, if there is uneven hardness, microstructure, and non-uniform internal stress and other disadvantages, then Contact stress is generally caused by the influence of the opposite underground crack. If the surface quality of the part is poor, there is a defect (oxidation, decarburization), friction or poor lubrication, from the surface crack.
The method of controlling the rolling sound is to select a low-noise Koyo bearing, that is, a bearing with a small waviness, and carefully select the conditions of use. The raceway sound often affects the noise of the entire machine, and reducing the raceway sound can reduce the noise of the entire machine.
Bearings can have a long life under proper use. If damage occurs prematurely, it is most likely due to incorrect selection, improper use or poor lubrication.
Therefore, when installing Koyo bearings, we need to record the type of machine, the installation location, the conditions of use and the surrounding fit. Through research to summarize the type of bearing damage, the use environment when the problem occurs, to avoid similar situations happen again.
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