One-way bearing fatigue failure is a failure of the surface form, mainly manifested by fatigue crack initiation, expansion and fracture processes, and the long-term effects of load failure on the metal. The crack is in two ways:
1. From the surface, this is the external load caused by the cyclic deformation of the plastic surface of the FAG bearing during the rolling contact due to the plastic deformation of the working surface and the strained surface of the strain hardening surface, and finally developed in the small crack. 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 hitting 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 the one-way bearing, or from the crack of 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 FAG 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.
Rolling sound of one-way bearing and its control method Rolling sound is a harsh metal friction sound that can occur in cylindrical roller bearings in all occasions. Most of them occur in grease-lubricated larger type bearings, and the performance of base oil deteriorates. Grease is more likely to occur and hardly occurs when oil is lubricated. In addition, it is more likely to occur in winter. When subjected to pure radial load, it is easy to occur in the case of large radial clearance, and it is easy to occur in a certain speed range depending on the size of the model, and it will occur continuously. It will appear intermittently. Special processing methods for the outer ring raceway can prevent the occurrence of rolling noise. If necessary, the bearing can be selected, or the radial clearance of the FAG bearing can be appropriately reduced, and the grease with excellent performance and the matching with the bearing can be used. rigidity
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