Ultra-abrasion resistant multifunctional nano carbon brush and preparation method thereof

Abstract

The invention relates to an ultra-abrasion resistant multifunctional nano carbon brush which comprises the following components in parts by weight: 40-60 parts of copper powder and 60-40 parts of cementing graphite powder. The cementing graphite powder comprises the following components in parts by weight: 0.7-1.5 parts of nano silicon oxide, 8.0 parts of subnano graphite powder, 70.5-71.3 parts of flake graphite powder and 45 parts of phenolic resin solution with concentration of 45 percent. The invention has the advantages that the abrasion resistance of the carbon brush is obviously reinforced, and the service life of a single carbon brush reaches 920 hours; and the working contact surface is stably run, the reversing performance is excellent and the spark is tiny, the noise is greatlylowered and the start power is improved by more than 30 percent. The overlong service life is realized by adding the nano silicon oxide; the low noise and the favorable reversing performance are realized by adding the subnano graphite powder; and the favorable conductive performance is realized by adding the copper powder.

Description

Super wear-resistant all-purpose nano carbon brush and preparation method thereof technical field The invention relates to a carbon brush, in particular to a low-voltage motor, especially a super wear-resistant all-round nano carbon brush for an auxiliary permanent magnet motor of an automobile and a preparation method thereof. "Almighty" means that this kind of carbon brush can meet the various performance indicators of the carbon brush when the motor is running, that is, low noise, small spark level, and long service life. However, it is difficult for ordinary carbon brushes to meet the above performance indicators at the same time. Background technique The process of producing carbon brushes in the past technology is to use flake graphite powder with a carbon content of 95% or 99% and pitch or phenolic resin in proportion to mix, pulverize, and sieve to make cemented graphite powder, and then mix it with copper powder, tin powder and Lead powder etc. are mixed, pressed...

AI Technical Summary

Problems solved by technology

The resistivity is too high, so it is not suitable as a carbon brush for low-voltage motors, especially automotive auxiliary permanent magnet motors