Combined rolling body antifriction bearing capable of increasing contact wrap angles of rolling bodies

Abstract

The invention provides a combined rolling body antifriction bearing capable of increasing the contact wrap angles of rolling bodies. The antifriction bearing comprises a bearing inner ring, a bearing outer ring and the combined rolling bodies evenly distributed between the bearing inner ring and the bearing outer ring. The outer surface of each combined rolling body is a surface wear-resistant material layer with the elasticity modulus being E1. The core part of each rolling body is a core part soft base material layer with the elasticity modulus being E2. The surface wear-resistant material layer and the core part soft base material layer of each rolling body are fixedly connected. The thickness H1 of the surface wear-resistant material layers is smaller than the thickness H2 of the core part soft base material layers. In this way, the deformation of the surface wear-resistant material layers with the elasticity modulus being E1 is increased, and E2=E1*(40%-60%). Under the effect of a load, the two kinds of material layers deform at the same time, and thus the contact wrap angles of the rolling bodies and a raceway are effectively increased; meanwhile, the intensity of pressure of the contact positions is reduced, and the problems that the bearing rings are abraded and a lubrication film raptures in an interference state are solved.

Description

technical field [0001] The invention belongs to the field of bearings, and in particular relates to a composite rolling element rolling bearing capable of increasing the contact wrap angle of rolling elements. Background technique [0002] Rolling bearings are important basic components widely used in machines. For a long time, people have widely used materials with high elastic modulus to manufacture rolling bearings in order to achieve high hardness, high wear resistance and good bearing capacity of rolling bearings. However, a high elastic modulus will lead to small contact deformation between the rolling element and the inner and outer rings of the bearing, small contact area, strong contact pressure, and large friction per unit contact area, which increases the wear of the bearing. A strong contact pressure is also not conducive to the formation of a lubricating oil film, which reduces the anti-friction effect of the lubricant. Such problems are particularly prominent ...

AI Technical Summary

Problems solved by technology

So far, there has not been a rolling bearing that increases the wrap angle by using a rolling element composed of high and low elastic modulus materials to increase the service life.

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