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A kind of material used to prepare the brush for grounding return device of EMU

A technology of backflow device and grounding brush, which is applied in the field of material science to achieve excellent lubricity, low friction coefficient, and prevent the increase of contact resistance

Active Publication Date: 2019-06-11
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 provides a high-power (extremely large current), high-speed (large linear velocity of the brush), and high safety and reliability characteristics of the EMU. A kind of material used to prepare the grounding brush for the grounding return device of the EMU

Method used

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  • A kind of material used to prepare the brush for grounding return device of EMU
  • A kind of material used to prepare the brush for grounding return device of EMU
  • A kind of material used to prepare the brush for grounding return device of EMU

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. Raw material preparation

[0048] Raw materials are prepared according to the following proportions by weight:

[0049]

[0050] 2. Prepare the premix

[0051] 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;

[0052] 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;

[0053] 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.

[0054] 3. Drying treatment

[0055] The premixed material was placed in a vacuum drying oven and dried at 30° C. for 2 h to remove the liquid substances therein.

[0056] 4. Compression treatment

[...

Embodiment 2

[0067] 1. Raw material preparation

[0068] Raw materials are prepared according to the following proportions by weight:

[0069]

[0070] 2. Prepare the premix

[0071] 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;

[0072] 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;

[0073] 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.

[0074] 3. Drying treatment

[0075] The premix was placed in a vacuum drying oven, and dried at 25° C. for 2.5 hours to remove the liquid substances therein.

[0076] 4. Compression treatment

[00...

Embodiment 3

[0087] 1. Raw material preparation

[0088] Raw materials are prepared according to the following proportions by weight:

[0089]

[0090] 2. Prepare the premix

[0091] 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;

[0092] 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;

[0093] 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.

[0094] 3. Drying treatment

[0095] The premix was placed in a vacuum drying oven, and dried at 20° C. for 3 h to remove the liquid substances therein.

[0096] 4. Compression treatment

[0097] The dri...

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Abstract

The invention provides a material for preparing an electric brush for a grounding reflux device of a motor train unit. The material comprises high-purity electrolytic copper powder, tin powder, zinc powder, purified graphite powder, a lubricant, a copper-coated graphite fiber, nano aluminum oxide and a release agent, wherein tungsten disulfide or molybdenum disulfide is selected by the lubricant; and the release agent is stearate. The electric brush prepared from the material for preparing the electric brush for the grounding reflux device of the motor train unit is excellent in performance, and is superior to an existing electric brush product; contact pressure of one pair of electric brushes is reduced; the allowed working current is high; over-high temperature rise is prevented; normal working of an axle box and the electric brush is ensured; the hardness is high, the attrition rate is low and the friction coefficient is low; the allowed linear velocity is high; and the operating requirements of the motor train unit can be completely met.

Description

technical field [0001] The invention relates to a material used for preparing a brush for a grounding return device of an EMU, and belongs to the field of material science. 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 grounding brush used was a ring-shaped brush with a diameter of 50mm, an inner hole diameter of 10-16mm, and different heights. The grounding brush was 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 requirements for the use o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R39/20H01R39/22
Inventor 顾志平朱约辉
Owner SUZHOU DONEKA NEW MATERIALS CORP LTD
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