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Composite material for carbon brush used for electric machine and preparation method thereof

A composite material and carbon brush technology, applied in the field of new materials, can solve the problems of insufficient wear resistance, high cost of tungsten disulfide composite materials, and low electrical conductivity, so as to improve wear resistance, increase wear resistance coefficient, and reduce weight Effect

Inactive Publication Date: 2019-01-29
JIANGSU HUAYU CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tungsten disulfide composite material has high cost, low conductivity and insufficient wear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of composite material for motor carbon brush, is made up of modified tungsten dioxide, nano-graphite powder, epoxy resin and filler, and the weight ratio of modified tungsten dioxide, nano-graphite powder, epoxy resin and filler is 20:12: 5:2; the modified tungsten dioxide includes the following components in parts by weight: 5 parts of tungsten dioxide, 18 parts of dopamine solution with a molar concentration of 0.12mol / l, and foamed copper 2 with a porosity of 25%. 1 part and 1 part steel fiber.

[0020] Wherein, the filler consists of ginkgo biloba extract and a toughening agent.

[0021] The preparation method of the composite material for the carbon brush of the above-mentioned motor comprises the following steps:

[0022] Step 1, prepare modified tungsten dioxide, mix and stir foamed copper, steel fiber and dopamine solution, then add tungsten dioxide, after magnetic stirring, put it into an extruder and extrude to obtain modified tungsten dioxide;

[002...

Embodiment 2

[0026] A kind of composite material for motor carbon brush, is made up of modified tungsten dioxide, nano graphite powder, epoxy resin and filler, and the weight ratio of modified tungsten dioxide, nano graphite powder, epoxy resin and filler is 28:15: 10:2; the modified tungsten dioxide includes the following components in parts by weight: 6 parts of tungsten dioxide, 20 parts of dopamine solution with a molar concentration of 0.5mol / l, and 5 parts of foamed copper with a porosity of 38% and steel fiber 2 parts.

[0027] The filler consists of ginkgo biloba extract and a toughening agent.

[0028] The preparation method of the composite material for the carbon brush of the above-mentioned motor comprises the following steps:

[0029] Step 1, prepare modified tungsten dioxide, mix and stir foamed copper, steel fiber and dopamine solution, then add tungsten dioxide, after magnetic stirring, put it into an extruder and extrude to obtain modified tungsten dioxide;

[0030] Step...

Embodiment 3

[0033] A kind of composite material for motor carbon brush, is made up of modified tungsten dioxide, nano-graphite powder, epoxy resin and filler, and the weight ratio of modified tungsten dioxide, nano-graphite powder, epoxy resin and filler is 32: 18: 14:9; the modified tungsten dioxide includes the following components in parts by weight: 8 parts of tungsten dioxide, 24 parts of dopamine solution with a molar concentration of 0.8mol / l, and 8 parts of foamed copper with a porosity of 48%. and steel fiber 3 parts.

[0034] The filler consists of ginkgo biloba extract and a toughening agent.

[0035] The preparation method of the composite material for the carbon brush of the above-mentioned motor comprises the following steps:

[0036] Step 1, prepare modified tungsten dioxide, mix and stir foamed copper, steel fiber and dopamine solution, then add tungsten dioxide, after magnetic stirring, put it into an extruder and extrude to obtain modified tungsten dioxide;

[0037] St...

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Abstract

The invention discloses a composite material for a carbon brush used for an electric machine and a preparation method thereof. The composite material is composed of modified tungsten dioxide, nanometer graphite powder, epoxy resin and a filler in a weight ratio of (20-32): (12-18): (5-14): (2-9), wherein the modified tungsten dioxide comprises, by weight, 5-8 parts of tungsten dioxide, 18-24 partsof a dopamine solution, 2-8 parts of foamy copper and 1-3 parts of steel fibers. Compared with the prior art, the composite material and the preparation method thereof in the invention have the following advantages: through the modification treatment of tungsten dioxide, the usage amount of tungsten dioxide and the cost of materials used for the carbon brush are reduced; the modified tungsten dioxide is loaded with the steel fibers and carbon fibers, so the wear resistance of tungsten dioxide is improved, and the weight of tungsten dioxide is reduced; and since the carbon brush is prepared from the modified tungsten dioxide, the wear resistance coefficient of the carbon brush is improved and the service life of the carbon brush is prolonged.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a composite material for motor carbon brushes and a preparation method thereof. Background technique [0002] A carbon brush is a device that transmits energy or signals between a fixed part and a rotating part of a motor, generator or other rotating machinery, and is a technical component used on a motor. The friction materials used in carbon brushes are mostly composed of graphite, metal powder, molybdenum disulfide and tungsten disulfide. If the carbon brush works for a long time, a thick carbon film will be formed on the surface of the commutator, which will affect the service life of the machine. Which composite material to choose to replace the existing material and meet the demand is a topic worth studying. [0003] Application number 201410716926.0 discloses a tungsten disulfide composite material for motor carbon brushes and a preparation method thereof. The composite mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K13/06C08K9/12C08K7/06C08K7/04C08K5/00
CPCC08K5/005C08K7/04C08K7/06C08K9/12C08K13/06C08K2201/011C08L63/00
Inventor 周兵
Owner JIANGSU HUAYU CARBON
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