Micromotor commutator electric contact material for raising wear resistance and arc erosion resistance

An electrical contact material and micro-motor technology, applied in the field of metal materials, can solve problems such as poor processing performance of electrical contact materials, and achieve the effects of increasing contact stability, improving stability and service life, and reducing wear debris

Active Publication Date: 2012-03-28
CHONGQING CHUANYI AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor processing performance of oxide-reinforced electrical contact materials, how to use oxide-reinforced technology in sliding electrical contact materials to improve the wear resistance and arc erosion resistance of commutator electrical contact materials is an important issue. The performance of the commutator and the service life and stability of the micro-motor are the concerns of the majority of technicians in the field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The alloy composition of embodiment 1 to 12 is shown in table 1.

[0026] Table 1 Chemical composition (weight %) of each embodiment

[0027] Example

Cu

Ni

Zn

al 2 o 3

ZrO 2

CeO 2

Cr 2 o 3

Oxide particle sizer

Ag

1

8.0

0.5

1.0

0.5

-

-

-

0.5μm≤r≤3μm

margin

2

8.0

0.5

1.0

-

0.5

-

-

0.5μm≤r≤3μm

margin

3

8.0

0.5

1.0

-

-

0.5

-

0.5μm≤r≤3μm

margin

4

8.0

0.5

1.0

-

0.5

-

0.5

0.5μm≤r≤3μm

margin

5

4.0

0.3

3.0

1.0

-

-

-

0.5μm≤r≤3μm

margin

6

4.0

0.3

3.0

-

1.0

-

0.5μm≤r≤3μm

margin

7

4.0

0.3

3.0

-

-

1.0

-

0.5μm≤r≤3μm

margin

...

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PUM

PropertyMeasurementUnit
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Abstract

The invention discloses a micromotor commutator electric contact material for raising wear resistance and arc erosion resistance. The material provided by the invention comprises the following components of: by weight, 1-8% of Cu, 0.1-0.5% of Ni, 0-5% of Zn, 0.5-2% of an oxide, and the balance being silver, wherein the oxide is any one selected from Al2O3, ZrO2, CeO2 and Cr2O3, and the granularity of the oxide needs to be controlled below 3 microns. Prepared by a powder metallurgic technique, the material has excellent wear resistance, arc resistance and welding resistance, can be used to effectively prevent short circuit caused by aggregation of abrasive dust in a groove of a commutator, and is suitable for manufacturing a micromotor commutator with large arc during the commutation stage.

Description

technical field [0001] The invention relates to a metal material, in particular to an electrical contact material for a micro-motor commutator with improved wear resistance and arc erosion resistance; a two-layer composite material composed of the electrical contact material as the working layer and copper as the base layer material; and a commutator made of the two-layer composite material, and a DC micromotor using the commutator. Background technique [0002] During the working process of the DC micro-motor, the commutator and the brush slices are in contact with each other and slide relative to each other to realize the transmission of current and keep the motor running. Therefore, there is unavoidable sliding friction and wear between the commutator and the brush, and there is also arc generation, which causes damage to the material. The wear debris produced during the friction and wear process of the commutator and the brush plate is squeezed between the two, affectin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/08H01H1/0237
Inventor 徐永红章应
Owner CHONGQING CHUANYI AUTOMATION
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