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Preparation method of graphite-based carbon brush material resistant to electric arc ablation

A graphite-based, arc-resistant technology, applied in circuits, current collectors, electrical components, etc., can solve problems such as arc ablation and carbon brush wear, and achieve the effect of large surface energy, increased surface activity, and a smooth feeling

Pending Publication Date: 2019-11-26
刘文旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention: Aiming at the problem that conventional carbon brushes will suffer from aggravated wear and severe arc ablation under high-density current-carrying conditions, which cannot meet the requirements of use, an arc ablation-resistant graphite-based brush is provided. Preparation method of carbon brush material

Method used

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  • Preparation method of graphite-based carbon brush material resistant to electric arc ablation

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Experimental program
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Effect test

Embodiment 1

[0040] In parts by weight, weigh 30 parts of graphite, 4 parts of sodium sulfate, 2 parts of sodium carbonate, 0.8 part of sodium lauryl sulfate, 6 parts of triethanolamine, 30 parts of absolute ethanol, and 60 parts of deionized water respectively. Add absolute ethanol to deionized water, stir at 100r / min at room temperature for 6 minutes to obtain an ethanol solution, add sodium sulfate, sodium carbonate, sodium lauryl sulfate, and triethanolamine into the ethanol solution, and stir at 200r / min at room temperature Stir for 30 minutes to obtain a grinding aid, add graphite to the grinding aid, and grind for 20 hours at a speed of 180r / min at room temperature to obtain a suspension, put the suspension in a centrifuge, and centrifuge at a speed of 2500r / min at room temperature for 6 minutes, Remove the solid in the lower layer, wash with deionized water for 3 times, and dry in an oven at 60°C for 2 hours to obtain ultrafine graphite powder with an average particle size of 6 μm; ...

Embodiment 2

[0042] In parts by weight, weigh 35 parts of graphite, 5 parts of sodium sulfate, 2.5 parts of sodium carbonate, 1.0 part of sodium lauryl sulfate, 7 parts of triethanolamine, 35 parts of absolute ethanol, 70 parts of deionized water, and Add absolute ethanol to deionized water, stir at 110r / min at room temperature for 7 minutes to obtain an ethanol solution, add sodium sulfate, sodium carbonate, sodium lauryl sulfate, and triethanolamine into the ethanol solution, and stir at 220r / min at room temperature Stir for 35 minutes to obtain a grinding aid, add graphite to the grinding aid, grind for 22 hours at a speed of 190r / min at room temperature to obtain a suspension, place the suspension in a centrifuge, and centrifuge at a speed of 2750r / min for 7 minutes at room temperature, Remove the solid in the lower layer, wash it with deionized water for 4 times, and dry it in an oven at 70°C for 3 hours to obtain ultrafine graphite powder with an average particle size of 7 μm; then we...

Embodiment 3

[0044] In parts by weight, weigh 40 parts of graphite, 6 parts of sodium sulfate, 3 parts of sodium carbonate, 1.2 parts of sodium lauryl sulfate, 8 parts of triethanolamine, 40 parts of absolute ethanol, and 80 parts of deionized water respectively. Add absolute ethanol to deionized water, stir at 120r / min at room temperature for 8 minutes to obtain an ethanol solution, add sodium sulfate, sodium carbonate, sodium lauryl sulfate, and triethanolamine into the ethanol solution, and stir at 240r / min at room temperature Stir for 40 minutes to obtain a grinding aid, add graphite to the grinding aid, and grind for 24 hours at a speed of 200 r / min at room temperature to obtain a suspension, place the suspension in a centrifuge, and centrifuge at a speed of 3000 r / min for 8 min at room temperature, Remove the solid in the lower layer, wash it with deionized water for 5 times, place it in an oven at 80° C. and dry it for 4 hours to obtain ultrafine graphite powder with an average parti...

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Abstract

The invention relates to a preparation method of a graphite-based carbon brush material resistant to electric arc ablation, and belongs to the technical field of motors. According to the preparation method, by means of the electroplating process, the surface of superfine graphite powder is electroplated with a layer of metal copper, and the graphite-based carbon brush material resistant to the electric ablation is prepared. The copper has good heat conductivity and electric conductivity and is high in mechanical stability and good in corrosion resistance, the surface of the superfine graphitepowder is electroplated with the metal copper, and therefore the surface of the superfine graphite powder can have a lubrication function, and the surface hardness can be moderate. Graphite has uniqueelectric conductivity, and therefore electron transfer in reaction can be facilitated. The vertical electron density of carbon atoms in graphite crystals is large, and therefore the carbon atoms in the graphite crystals can have special chemical activity. A large number of evenly-distributed copper-plated microcrystals can be generated on the surface of the graphite through catalysis, and therefore the improvement of the electroplating method copper plating efficiency is facilitated, and the graphite-copper interface combination and the organization structure of the carbon brush material areobviously improved; and the electric conduction performance of the carbon brush material can be remarkably improved, and therefore the electric arc resistance performance of the carbon brush materialis effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a graphite-based carbon brush material resistant to arc ablation, and belongs to the technical field of motors. Background technique [0002] With the popularity of cars in modern society, people have higher and higher requirements for cars. There are various motors inside the car to facilitate the user's operation of the various systems of the car. Taking the seat system as an example, the lifting, forward and backward movement, and angle adjustment of the seat are all driven by motors. This type of motor generally adopts a low-voltage (generally about 12V) DC brushed motor. Since the seat motor is close to the user, the noise requirements are very high. In the noise system, the running-in of carbon brushes and commutators accounts for most of the proportion, so higher requirements are put forward for the materials and structures of such carbon brushes. [0003] Carbon brush is an important componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F3/23B22F5/00C25D7/00H01R39/26
CPCB22F5/00B22F3/23C25D7/00H01R39/26B22F2998/10B22F1/17B22F1/14
Inventor 刘文旭
Owner 刘文旭
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