A kind of metal fiber electric brush and preparation method thereof

A metal fiber and fiber technology, applied in the field of electrical contact materials, can solve problems such as circuit short circuit, brush wear, system burnout, etc., and achieve the effects of small contact resistance, long service life, and large current-carrying capacity

A metal fiber and fiber technology, applied in the field of electrical contact materials, can solve problems such as circuit short circuit, brush wear, system burnout, etc., and achieve the effects of small contact resistance, long service life, and large current-carrying capacity

CN104332795BActive Publication Date: 2017-02-01CENT SOUTH UNIV
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  • A kind of metal fiber electric brush and preparation method thereof
  • A kind of metal fiber electric brush and preparation method thereof
  • A kind of metal fiber electric brush and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A method for preparing a metal fiber brush is achieved by adopting the following scheme:

[0048] The first step: 1 brass fiber with a diameter of 30 μm (Cu-20wt% Zn alloy fiber; conductive metal fiber) and 7 aluminum-magnesium alloy fibers with a diameter of 30 μm (Al-5wt% Mg alloy fiber; filled metal fiber) Winding together on the winding reel to obtain a metal fiber ring in which the brass fiber and the aluminum-magnesium alloy fiber are evenly matched;

[0049] Step 2: After the winding is completed, the metal fiber ring is cut to obtain a metal fiber bundle in which the brass fiber and the aluminum-magnesium alloy fiber are evenly matched;

[0050] The third step: press the metal fiber bundle obtained in the second step and wrap it with a metal sheath to obtain a metal fiber brush blank. Since the brush blank cannot be completely dense during pressing, the relative density of the prepared brush blank is relatively high. The density is about 85%; the pressure needs...

Embodiment 2

[0054] A method for preparing a metal fiber brush is achieved by adopting the following scheme:

[0055] The first step: a brass fiber (Cu-20wt% Zn alloy fiber; conductive metal fiber) with a diameter of 200 μm and an aluminum-magnesium alloy fiber (Al-5wt% Mg alloy fiber; filled metal fiber) with a diameter of 50 μm Winding together on the winding reel to obtain a metal fiber ring in which the brass fiber and the aluminum-magnesium alloy fiber are evenly matched;

[0056] Step 2: After the winding is completed, the metal fiber ring is cut to obtain a metal fiber bundle in which the brass fiber and the aluminum-magnesium alloy fiber are evenly matched;

[0057] The third step: Press the metal fiber bundle obtained in the second step and wrap it with a metal sheath to obtain a metal fiber brush blank. The relative density of the brush blank is about 85%. The pressure needs to be controlled during pressing to ensure a softer brush. The aluminum-magnesium alloy fiber has a certa...

Embodiment 3

[0061] A method for preparing a metal fiber brush is achieved by adopting the following scheme:

[0062] The first step: 2 brass fibers with a diameter of 50 μm (Cu-20wt% Zn alloy fiber; conductive metal fiber) and 1 aluminum-magnesium alloy fiber with a diameter of 120 μm (Al-5wt% Mg alloy fiber; filled metal fiber) Winding together on the winding reel to obtain a metal fiber ring in which the brass fiber and the aluminum-magnesium alloy fiber are evenly matched;

[0063] Step 2: After the winding is completed, the metal fiber ring is cut off to obtain a metal fiber bundle in which the brass fiber and the aluminum-magnesium alloy fiber are evenly matched; the obtained metal fiber bundle is cut according to the length of the designed metal fiber brush, After obtaining multi-segment metal fiber bundles, arrange them uniformly along the length direction;

[0064] The third step: Press the metal fiber bundle obtained in the second step and wrap it with a metal sheath to obtain a...

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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...

Claims

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Application Information

Patent Timeline
01 Feb 2017
Publication
CN104332795B
IPC
H01R39/20; H01R43/12
CPC
H01R39/20; H01R39/24; H01R43/12
Inventors
周科朝; 张雷