Bearing retainer and preparation method thereof

Abstract

The invention relates to a bearing retainer and a preparation method thereof. The bearing retainer is mainly formed by injection molding of following raw materials comprising, by weight, 15-30 parts of carbon fiber, 8-15 parts of polybenzimidazole, 60-75 parts of polyether ether ketone, and 1-2 parts of lubricant. The bearing retainer provided by the invention is mainly formed by mixing, extrudingand pelletizing the carbon fiber, the polybenzimidazole, the polyether ether ketone and the lubricant through injection molding. Under the condition of oil lubrication, the sliding friction coefficient of the bearing retainer with metal is less than 0.06, the dry friction coefficient is less than 0.3, wear is small, and the tensile strength is not lower than 90 MPa at normal temperature. The bearing retainer has good impact resistance and fatigue durability, can absorb vibration and reduce noise, has small density and can run easily at high speed. Under the condition of oil cut-off, a transfer lubricant layer can be formed on the retainer, and the extreme situation that the bearing gets stuck and stops rotating cannot be caused immediately.

Description

technical field [0001] The invention belongs to the field of bearing cages, and in particular relates to a bearing cage and a preparation method thereof. Background technique [0002] As an important transmission component, bearings are widely used in machine tools and other mechanical fields. Bearings mainly include bearing inner rings, bearing outer rings, rolling elements and cages. Among them, the function of the cage is mainly to make the rolling elements evenly distributed, prevent the rolling elements from falling off and guide the rolling elements to rotate. In the prior art, according to the material of the cage, it can be divided into a metal cage and a non-metal cage. The cages of these two materials are used in different applications due to their different material properties. For applications requiring high strength of the cage and fast running speed of the bearing, metal cages are generally used. [0003] For some high-temperature and high-speed applications,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a bearing cage, which is used to solve the technical problem in the prior art that in some high-temperature and high-speed applications, the bearing is easily stuck because the lubrication system cannot supply oil normally.

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