Electric brush for train set grounding backflow device

A technology for backflow devices and EMUs, applied in the direction of circuits, connections, collectors, etc., can solve the problems of low resistivity, good lubricity, and long service life of brushes, and achieve low raw material resistivity, high PV characteristics, and long life. The effect of service life

Active Publication Date: 2017-01-11
SUZHOU DONEKA NEW MATERIALS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems existing in the grounding brush used in the grounding return device of the EMU, the present invention is based on the high power (extremely large current), high speed (the linear speed of the brush is large, up to 28.8m / s) and high safety of the EMU. The characteristics of reliability provide a brush for the grounding return device of the EMU. The brush prepared by this method has low resistivity, good lubricity and long service life

Method used

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  • Electric brush for train set grounding backflow device
  • Electric brush for train set grounding backflow device
  • Electric brush for train set grounding backflow device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] 1. Raw material preparation

[0075] Raw materials are prepared according to the following proportions by weight:

[0076]

[0077] 2. Prepare the premix

[0078] At room temperature, add the prepared high-purity electrolytic copper powder, tin powder, zinc powder, purified graphite powder, molybdenum disulfide and copper-coated graphite fiber into the V-shaped mixer, and mix for 30 minutes with the cover closed to prepare the first pre-prepared mix;

[0079] Then spray the nano-alumina alcohol solution (25% by mass fraction) into the mixed first mixture, close the lid and mix for 60 minutes to obtain the second premix;

[0080] Finally, the zinc stearate was added to the mixed second mixture, and the lid was closed and mixed for 60 minutes to prepare the premix.

[0081] 3. Drying treatment

[0082] The premixed material was placed in a vacuum drying oven and dried at 30° C. for 2 h to remove the liquid substances therein.

[0083] 4. Compression treatment

[...

Embodiment 2

[0094] 1. Raw material preparation

[0095] Raw materials are prepared according to the following proportions by weight:

[0096]

[0097] 2. Prepare the premix

[0098] At normal temperature, add the prepared high-purity electrolytic copper powder, tin powder, zinc powder, purified graphite powder, molybdenum disulfide and copper-coated graphite fiber into the V-type mixer, and mix for 35 minutes with the cover closed to prepare the first pre-prepared mix;

[0099] Then spray the nano-alumina alcohol solution (25% by mass fraction) into the mixed first mixture, close the lid and mix for 70 minutes to obtain the second premix;

[0100] Finally, the zinc stearate was added into the mixed second mixture, and the lid was closed and mixed for 50 minutes to prepare the premix.

[0101] 3. Drying treatment

[0102] The premix was placed in a vacuum drying oven, and dried at 25° C. for 2.5 hours to remove the liquid substances therein.

[0103] 4. Compression treatment

[01...

Embodiment 3

[0114] 1. Raw material preparation

[0115] Raw materials are prepared according to the following proportions by weight:

[0116]

[0117] 2. Prepare the premix

[0118] At room temperature, add the prepared high-purity electrolytic copper powder, tin powder, zinc powder, purified graphite powder, molybdenum disulfide and copper-coated graphite fiber into the V-type mixer, and mix for 40 minutes with the cover closed to obtain the first pre-prepared mix;

[0119] Then spray the nano-alumina alcohol solution (25% by mass fraction) into the mixed first mixture, close the lid and mix for 80 minutes to obtain the second premix;

[0120] Finally, the zinc stearate was added to the mixed second mixture, and the lid was closed and mixed for 40 minutes to prepare the premix.

[0121] 3. Drying treatment

[0122] The premix was placed in a vacuum drying oven, and dried at 20° C. for 3 h to remove the liquid substances therein.

[0123] 4. Compression treatment

[0124] The dri...

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Abstract

The invention provides an electric brush for a train set grounding backflow device. The electric brush manufacturing method comprises the following steps: at a room temperature, a raw material comprising high-purity electrolytic copper powder, tin powder, zinc powder, purified graphite powder, a lubricant, copper-coated graphite fiber, nano alumina and a release agent is uniformly mixed, a premix is manufactured, the premix is subjected to pressing treatment after drying treatment, an electric brush compact is manufactured, the electric brush compact is subjected to sintering treatment, an electric brush blank is manufactured, the electric brush blank after aging treatment is subjected to an electric brush finished product processing treatment, and an electric brush finished product is obtained, wherein the lubricant selects tungsten disulfide and / or molybdenum disulfide, and the release agent is stearate. The manufactured electric brush for the train set grounding backflow device has excellent performance, the contact voltage drop between a pair of electric brushes is reduced, the working current allowed to pass is large, the harness is high, the wear rate and the friction coefficient are low, the permissible line speed is high, and operation requirements of the train set can be met completely.

Description

technical field [0001] The invention relates to a brush, in particular to a brush for a grounding return device of an EMU, and belongs to the technical field of electric locomotives. Background technique [0002] On a locomotive powered by electricity, there must be a current-receiving part (pantograph slide) that obtains power, and a grounding part that forms a loop (grounding return device brush, referred to as the grounding brush) to prevent current from flowing The bearing box, bearing end, wheel, and rail form a loop, and the bearing is eroded or burned by electricity. In the past, due to the relatively small motor power of electric traction locomotives, the commonly used grounding brush is a ring-shaped brush with a diameter of 50mm, an inner hole diameter of 10-16mm, and different heights. The grounding brush is installed in the middle of the bearing end. Because the power (current) and speed of the locomotive are relatively low, this structure can meet the requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R39/24H01R39/22H01R43/12
Inventor 顾志平朱约辉
Owner SUZHOU DONEKA NEW MATERIALS CORP LTD
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