Metal electrographite brush with low cost and good performance and preparation method of metal electrographite brush

Abstract

The invention discloses a metal electrographite brush with low cost and good performance. The metal electrographite brush is characterized by being prepared from raw materials by weight: 40-60 parts of crystalline flake graphite, 18-28 parts of pitch, 20-30 parts of tungsten disulfide, 3-5 parts of iron powder, 12-15 parts of silicon carbide, 7-9 parts of beryllium oxide, 6-9 parts of copper-beryllium oxide powder and an appropriate amount of oleic acid. By adding the silicon carbide, the hardness of the brush is enhanced and the abrasive resistance is improved. By adding the abrasive resistance, the oxidation and wearing condition of the brush material are reduced and low contact resistance is ensured, so that sparks are reduced. By adding the copper-beryllium oxide powder, effects of improving the compactness and the conductivity are improved. The metal electrographite brush is good in conductivity and good in anti-wearing performance. Problems that a prior brush is easy to generate heat, lose powder and produce sparks are solved. Material performance is improved substantially and the service lifetime of the metal electrographite brush is prolonged.

Description

technical field [0001] The invention relates to a brush material, in particular to a low-cost metal graphite brush with good performance and a preparation method thereof. Background technique [0002] A brush is a conductive component that makes sliding contact with a moving part to form an electrical connection. The brush is used on the commutator or slip ring as a sliding contact body for importing and exporting current. It has good electrical conductivity, thermal conductivity and lubricating properties, and has certain mechanical strength and reversible spark instinct. Almost all DC motors, as well as commutated motors, use brushes, which are an important part of the motor. Compared with the products of the same industry manufacturers in advanced developed countries, domestic brush products for motors have defects such as low product grade, short service life, large sparks during operation, easy to damage slip rings, poor lubrication performance, and non-interchangeab...

AI Technical Summary

Problems solved by technology

Compared with the products of the same industry manufacturers in advanced developed countries, domestic brush products for electric motors have defects such as low product grade, short service life, large sparks during operation, easy to damage slip rings, poor lubrication performance, and non-interchangeability, etc.

The application field of composite materials of metal materials and inorganic non-metal materials in our country is still at the lowest level at present, and the technology of some products even retains 100% mechanical application. This kind of brush material is far from meeting the requirements of modern industrial development.