Date: 2013-08-20

Double row spherical ball bearing friction and wear mechanism analysis

Double row radial spherical ball bearing friction mechanism is significantly different from other bearing friction depends mainly on the radial load, swing frequency, the number of swing, swing angle, the contact surface temperature and surface roughness factors. General double row spherical ball bearings within the movement, the outer ring relative sliding friction, the friction larger; compared with other bearing exercise liner layer and the inner or outer ring of friction relative sliding under its coefficient of friction is small. The studies show that in the double row of different materials under the same conditions to the coefficient of friction of the spherical ball bearings have significant differences, in the gasket material.
With the continuous development of the bearings, the wear mechanisms and forms of change. In the work process, generally lubricated bearings due to the relative sliding of the inner and outer rings, thereby causing the bearing to work
For the surface layer of material loss and cause the bearings is not working properly. The main wear adhesive wear, abrasive wear and corrosion wear of three types. Double row spherical ball bearings wear to work due to the relative sliding of the liner and the inner and outer rings, which caused the shedding of the liner, tearing, extrusion and other failure modes, resulting in the bearing is not working properly.
With the rotation of the bearing, double row spherical surface to the outer circle of the spherical ball bearings, including PTFE composite is formed between the outer ring spherical transfer film, reducing the shear strength of the contact surface, within the spherical micro sudden body the lubricating layer composite abrasions role significantly suppressed and mitigate. In this case the friction between the contact performance of the contact between the transfer film with the inner outsiders spherical, this contact reduces the frictional resistance when the bearing rotation, thereby significantly reducing the friction coefficient between the spherical. In the wear process, the film is constantly being extruded,
Self-lubricating layer thinning, resulting in a double row radial spherical ball bearings wear depth increases. Thus, the reason of the bearing failure in its swing process PTFE constantly being extruded, the lubricating function decline, eventually leading to the woven base material wear occurs.

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