Coated rolling element bearing

Abstract

A rolling element bearing, comprises an inner ring, an outer ring and rolling elements which are in rolling contact with the raceways of the inner ring and the outer ring. The rolling elements and / or the raceway (2) of at least one of the rings is coated with a metal-mixed diamond-like carbon layer (8).

Description

technical field [0001] The invention relates to the field of rolling element bearings, in particular to rolling element bearings with coating. Background technique [0002] Rolling element bearings are used in a variety of different environments. As long as lubrication can be ensured, they can generally achieve their normal design life. [0003] However, under poor or borderline lubrication conditions, the behavior of rolling element bearings is not very favorable. In such cases, it may prove impossible to form a lubricating film that would result in direct metal-to-metal contact between the rolling elements and the rings, leading to problems such as adhesive wear, galling and premature failure occur. [0004] Furthermore, rolling element bearings often exhibit a phenomenon known as "pseudo-friction erosion" when exposed to vibrational or oscillating motion phases without rotational motion under static loads, which also limits bearing performance. lifespan. [0005] As ...

AI Technical Summary

Problems solved by technology

In plain bearings, the adhesion of diamond-like carbon coatings to the substrate is sufficient, however, in rolling element bearings, such coatings will flake off due to the high contact stresses in rolling element bearings

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