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High-current-resistant motor carbon brush composite material

A composite material and current technology, applied in the direction of circuits, current collectors, electrical components, etc., can solve problems such as arc ablation, increased wear, and weakened wear resistance

Active Publication Date: 2020-10-20
东风博泽汽车系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional carbon brushes will experience increased wear and severe arc ablation under high current conditions. The wear resistance is greatly weakened, the wear time is significantly shortened, and the service life is significantly shortened.

Method used

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  • High-current-resistant motor carbon brush composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Carry out batching by the proportioning of embodiment 1 in table 1, preparation method is:

[0037] Step 1: adding the carbon powder, copper powder, molybdenum disulfide, vanadium carbide and chromium carbide into the mixer according to the proportion and stirring for 1 hour;

[0038] Step 2: Put the uniformly mixed raw materials into the raw material cylinder of the press molding machine, the filling mechanism automatically adds the powder into the mold cavity, and presses the powder into a billet with a pressing pressure of 20MPa and a holding time of 5s.

[0039] Step 3: Evenly place the shaped billet in an industrial electric furnace and sinter it into a carbon block. The sintering conditions are: firing for 5 hours under the protection of argon, and the firing temperature is 880°C-900°C.

[0040] Step 4: The sintered carbon block is processed into a carbon brush with a length of 19.5 mm and a section length of 9.6 mm long×7.2 mm wide.

Embodiment 2

[0042] Carry out batching by the proportioning of embodiment 2 in table 1, preparation method is:

[0043] Step 1: adding the carbon powder, copper powder, molybdenum disulfide, vanadium carbide and chromium carbide into the mixer according to the proportion and stirring for 2 hours;

[0044] Step 2: Put the uniformly mixed raw materials into the raw material barrel of the press molding machine, and the filling mechanism automatically adds the powder into the mold cavity, and presses the powder into a billet with a pressing pressure of 25MPa and a holding time of 5s.

[0045] Step 3: Place the formed billets evenly in an industrial electric furnace and sinter them into carbon blocks. The sintering conditions are: firing for 8 hours under the protection of argon, and the firing temperature is 850°C-870°C.

Embodiment 3

[0047] Carry out batching by the proportioning of embodiment 3 in table 1, and the preparation method is:

[0048] Step 1: adding the carbon powder, copper powder, molybdenum disulfide, vanadium carbide and chromium carbide into the mixer according to the proportion and stirring for 2 hours;

[0049] Step 2: Put the uniformly mixed raw materials into the raw material cylinder of the press molding machine, the filling mechanism automatically adds the powder into the mold cavity, and presses the powder into a billet with a pressing pressure of 20MPa and a holding time of 5s.

[0050] Step 3: Evenly place the shaped billet in an industrial electric furnace and sinter it into a carbon block. The sintering conditions are: firing for 5 hours under the protection of argon, and the firing temperature is 880°C-900°C.

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PUM

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Abstract

The invention relates to a high-current-resistant motor carbon brush composite material. The high-current-resistant motor carbon brush composite material is prepared from the following raw materials in parts by weight: 40-55 parts of carbon powder, 32-42 parts of copper powder, 3-4 parts of molybdenum disulfide, 3-4 parts of vanadium carbide and 1-5 parts of chromium carbide. The carbon brush composite material has good wear resistance, and the average wear time can reach 1222 h under the conditions that the environment temperature is 120 DEG C and the current intensity is 25-28 A.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a composite material used for motor carbon brushes. Background technique [0002] The carbon brush is an important part of the generator, which is used to transmit energy or signals between the fixed part of the generator and the rotating part (usually the collector ring). During its service, it will constantly rub against the collector ring. In addition to mechanical friction and wear, it is also accompanied by electrical wear. Traditional carbon brushes will experience increased wear and severe arc ablation under high current conditions, greatly weakened wear resistance, significantly shortened wear time, and thus significantly shortened service life. Therefore, it is an inevitable trend to improve traditional carbon brushes to develop a carbon brush material that still has good wear resistance under high current conditions. Contents of the invention [0003] Aiming at the tech...

Claims

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Application Information

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IPC IPC(8): H01R39/20H01R39/02H01R39/26H01R43/12B22F1/00B22F3/02B22F3/10
CPCH01R39/20H01R39/025H01R39/26H01R43/12B22F3/02B22F3/1007B22F1/105
Inventor 白文进
Owner 东风博泽汽车系统有限公司
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