A kind of metal fiber electric brush and preparation method thereof

Abstract

The invention discloses a metal fiber brush and a preparation method thereof. The brush comprises conductive metal fibers and filling metal fibers. The length of the filling metal fibers is shorter than the length of the conductive metal fibers, one end of each filling metal fiber is flush with one end of each conductive metal fiber, the conductive metal fibers and the filling metal fibers are uniformly arranged along a length direction, and after compacting molding, the filling metal fibers and the conductive metal fibers are integrally wrapped by a metal wrapping sleeve. The preparation method comprises: winding the conductive metal fibers and the filling metal fibers together on a wire reel to form a metal fiber ring; and cutting the metal fiber ring, after the compacting molding, immersing one end of the metal fiber ring in an acid solution or aqueous alkali, and dissolving the filling metal fibers to obtain the metal fiber brush. The metal fiber brush is compact and reasonable in structure, high in fiber bonding strength, simple in preparation process, large in current carrying capability, small in contact resistance, long in service life, fast in sliding speed, small in heat productivity and small in debris amount, is suitable for industrial production, can replace a conventional carbon brush or a conventional metal fiber brush, and can satisfy the application demand for a large-power high-precision conductive slip ring.

Description

technical field [0001] The invention discloses a metal fiber brush and a preparation method thereof, in particular to a metal fiber brush for a conductive slip ring and a preparation method thereof. Belongs to the technical field of electrical contact materials, Background technique [0002] Carbon brushes and metal-graphite composite brushes are widely used in many institutions and environments due to their advantages of self-lubrication, wear resistance, electric corrosion resistance and low price; however, their high volume resistance and contact resistance and are susceptible to atmosphere Disadvantages such as the impact of changes limit its application in the fields of high-power and high-precision conductive slip rings. Metal fiber brushes are composed of tens of thousands of hair-thin metal fibers oriented and bundled along the length direction, and the current is transmitted by sliding the tips of the metal fiber bundles on the surface of the slip ring or commutato...

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Problems solved by technology

[0003] 1. Because the wavy fibers are wrapped in the jacket to form, after molding, the fibers are not tightly bonded, which leads to the situation that the fibers are easy to fall from the wrapped jacket during the use of the brush, which is likely to cause a short circuit of the circuit and seriously , it will cause the system to be burned;

[0004] 2. When the wave-shaped metal fibers arranged in a direction are compressed, wrapped and shaped, due to the uncontrollable deformation of the fibers, the fiber distribution in the formed brush is uneven, resulting in brush wear during the use of the brush , heating, uneven current conduction and other phenomena will affect the performance of the brush;

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