Graphene/nano carbon fiber reinforced copper-base graphite motor carbon brush and preparation method thereof

Abstract

The invention discloses a graphene/nano carbon fiber reinforced copper-base graphite motor carbon brush. The carbon brush is prepared by mixing, pressing and then sintering an aggregate and a powder according to a certain ratio, wherein the weight ratio of the aggregate to the powder is (65-75): (30-35); the aggregate is a mixture of electrolytic copper powder and tin powder which have a weight ratio of (70-75):(25-30); and the powder is a mixture of graphene powder, isostatic pressing formed graphite powder, carbon black and nano carbon fiber which have a weight ratio of 30:20:40:10. The graphene/nano carbon fiber reinforced copper-base graphite motor carbon brush of the invention has good commutation and self-lubricating performance, prolongs the service life of an AC-DC motor, has low commutator abrasion, is simple in preparation process, low in equipment requirement, easy to operate. A prepared carbon brush reinforced body has good dispersity and good practicability.

Description

technical field [0001] The invention relates to the field of new carbon materials, in particular to a graphene-nano carbon fiber reinforced copper-based graphite motor carbon brush and a preparation method thereof. Background technique [0002] Carbon brushes, also called electric brushes, are widely used in many electrical equipment as a sliding contact. The function of the carbon brush is mainly to conduct electricity while rubbing against the metal. It is not the same as when the metal is rubbed against the metal; Brushes don't because carbon and metal are two different elements. Most of its uses are used in motors, and the shapes are various, square and round, and so on. [0003] Carbon brushes are mainly made of graphite, fat-impregnated graphite, metal (copper, silver) graphite, etc. A carbon brush is a device that transmits energy or signals between the fixed part and the rotating part of a motor or generator or other rotating machinery. It is generally made of pur...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is just to provide a kind of graphene-nano carbon fiber reinforced copper-based graphite motor carbon brush and preparation method thereof in order to solve the above problems, to solve the traditional carbon brush reversibility in the prior art, poor self-lubricating performance, The wear of the commutator is relatively large, which affects the service life of the AC and DC motors and other issues