professional factory for Main Brush Holder - High Quality Wind generator Brush Holder Assembly C274 – Morteng

Product Description

Assembly Detail Drawings

What is a carbon brush?

In the high current slip ring, brush block, also known as carbon brush, is a very important contact. The choice of carbon brush material directly affects the performance of the whole slip ring. As the name suggests, a carbon brush must contain elemental carbon. At present, the carbon brush on the market to add carbon materials, in addition to graphite, nothing else. Commonly used carbon brushes are copper graphite carbon brush and silver graphite carbon brush. Several carbon brushes will be described in detail below.

Graphite carbon brush

Copper is the most common metallic conductor, while graphite is a nonmetallic conductor. After adding graphite to the metal, the carbon brush produced not only has good electrical conductivity, but also has good wear resistance and graphite lubricity, plus the above two materials are affordable and easy to obtain. Therefore, the copper-graphite carbon brush is the most widely used high-current slip-ring carbon brush in the market. Morteng’s high-current slip rings are mostly copper-graphite carbon brushes. Therefore, this series of high current slip ring also has many advantages. In addition, half of them have maintainable structures. The service life of this type of slip ring can be basically more than 10 years.

Of course, in addition to copper – graphite carbon brush, there are other precious metal carbon brush,  such as silver graphite, silver – copper graphite, gold and silver – copper graphite carbon brush and so on. These brushes are also more expensive because of the addition of precious metals such as gold and silver. Of course, the use of precious metal carbon brush slip ring conductivity will be greatly improved. Therefore, in some high-end electromechanical equipment that needs to transmit large current, it is also necessary to use precious metal carbon brush high-current slip ring. After all, the need for such high-current slip rings is very small.

current slip rings, there are red copper or brass fast brush with high current slip rings. The requirements are relatively high. Due to the slightly different composition of copper and brass, their physical properties such as wear resistance and smoothness are also slightly different. In order to improve the lubrication performance between the brush and the copper ring, one can improve the fast surface smoothness of the copper ring and the brush, and two can be achieved by adding lubricating oil regularly. 

The impact of carbon brushes on the performance of high-current slip rings is also limited to electrical performance and service life. Through the above analysis, we can know that the electrical performance of high-current slip rings using copper-graphite, copper and brass brushes They are comparable, and the electrical conductivity of high-current slip rings using silver-copper graphite brushes and gold-silver-copper-graphite alloy brushes is higher. As for the impact on the service life, it has a relatively large relationship with the specific operation of the slip ring.