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High-electric-conductivity carbon pantograph pan and preparation method thereof

A pantograph carbon slide, high conductivity technology, applied in carbon preparation/purification, electric vehicle charging technology, current collectors, etc. High, weak mechanical strength and other problems, to achieve the uniform distribution of solute elements, improve the impregnation effect, and uniform distribution

Active Publication Date: 2019-11-12
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above prior art, the present invention provides a high-conductivity pantograph carbon slide and its preparation method to solve the problems of low electrical conductivity, weak mechanical strength and poor arc ablation resistance of the pantograph carbon slide

Method used

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  • High-electric-conductivity carbon pantograph pan and preparation method thereof
  • High-electric-conductivity carbon pantograph pan and preparation method thereof
  • High-electric-conductivity carbon pantograph pan and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of a high-conductivity pantograph carbon slide plate, comprising the following steps:

[0048] 1. Kneading: Take 65 parts by mass of pitch coke powder, 25 parts by mass of graphite powder and 8 parts by mass of high-temperature pitch as the base material; put the pitch coke powder and graphite powder into the kneading pot according to the weight ratio, and add The total mass of the base material is 5% methyl cellulose, fully mixed for 1 hour, the diameter of the used methyl cellulose is 0.2mm, and the length is 70mm; then add molten high-temperature asphalt and mix evenly, after cooling, put the mixture into a ball mill Grinding treatment is carried out in the medium to obtain carbon skateboard aggregate with a particle size of about 250 mesh.

[0049] 2. Pressing: pre-press the carbon skateboard aggregate into a carbon-based cylinder of 25mm*35mm*1200mm in a 200T hydraulic press, then raise the temperature of the carbon-based cylinder to about 80°C...

Embodiment 2

[0054] A preparation method of a high-conductivity pantograph carbon slide plate, comprising the following steps:

[0055] 1. Kneading: Take 70 parts by mass of pitch coke powder, 20 parts by mass of graphite powder and 10 parts by mass of high-temperature pitch as the base material; put pitch coke powder and graphite powder of two particle sizes into the kneading pot according to the weight ratio , and add ammonium carbonate accounting for 15% of the total mass of the base material, fully mix for 1h, the diameter of the ammonium carbonate used is 0.1mm, and the length is 50mm; then add molten high-temperature asphalt and mix evenly, after cooling, put the mixture into a ball mill Grinding treatment is carried out in the medium to obtain carbon skateboard aggregate with a particle size of about 200 mesh.

[0056] 2. Pressing: pre-press the carbon skateboard aggregate into a carbon-based cylinder of 25mm*35mm*1200mm in a 200T hydraulic press, then raise the temperature of the c...

Embodiment 3

[0061] A preparation method of a high-conductivity pantograph carbon slide plate, comprising the following steps:

[0062] 1. Kneading: Take 60 parts by mass of pitch coke powder, 30 parts by mass of graphite powder and 5 parts by mass of high-temperature pitch as the base material; put the pitch coke powder and graphite powder of two particle sizes into the kneading pot according to the weight ratio, And add methyl cellulose accounting for 3% of the total mass of the base material, fully mix for 1 hour, the diameter of the methyl cellulose used is 0.3 mm, and the length is 100 mm; then add molten high-temperature asphalt, and mix for 4 hours at a temperature of 160 ° C , after cooling, put the mixture into a ball mill for pulverization treatment, and obtain a carbon skateboard aggregate with a particle size of about 300 mesh.

[0063] 2. Pressing: pre-press the carbon skateboard aggregate into a carbon-based cylinder of 25mm*35mm*1200mm in a 200T hydraulic press, then raise t...

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Abstract

The invention discloses a high-electric-conductivity carbon pantograph pan and a preparation method thereof. A pore forming substance is added in a powder mixing stage in a carbon pan preparation process to obtain the carbon pan having communicated pores, thus increasing the electric conductivity of the carbon pan. A brazing alloy and copper metal are melted and mixed, and the mixture is adopted to impregnate the carbon pantograph pan so that the copper, the brazing alloy and carbon which are three materials are tightly bonded, thus increasing the bonding force of a copper-carbon interface. Anexternal strong magnetic field is applied in during impregnation to drive the melted copper alloy to be uniformly dispersed in pores of a carbon pantograph pan blank, thus increasing the impregnationefficiency and further improving mechanical strength and arc ablation resistance of the carbon pan. Through addition of the pore forming substance and the brazing alloy and through application of theexternal strong magnetic field, a problem that carbon pantograph pans are low in electric conductivity, low in mechanical strength, poor in arc ablation resistance can be effectively solved, and a new ideal is provided for preparation of carbon pantograph pans with high performance.

Description

technical field [0001] The invention belongs to the technical field of arc electric contact equipment, and in particular relates to a high-conductivity pantograph carbon slide plate and a preparation method thereof. Background technique [0002] Electric carbon material is a kind of electrical material with special functions based on carbon and graphite. It is used to manufacture fixed electrical contact or rotating electrical contact parts of electrical equipment, such as brushes for motors, power switches and Graphite contacts of relays and pantographs, etc.; in addition, graphite electrodes for arc discharge, carbon rods for spectral analysis, carbon films and carbon resistors, carbon and graphite heating elements, carbon rods for dry batteries, graphite anodes for large electronic tubes and grid etc. Due to the limitation of practical occasions, electric carbon materials generally need to have excellent electrical conductivity. [0003] The pantograph and catenary syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/532C04B35/622C04B38/02C04B41/88B60L5/20
CPCC04B35/532C04B35/522C04B35/622C04B38/02C04B41/88C04B41/5127B60L5/205C04B2235/6562C04B2235/6567C04B41/4523C04B41/4578C04B35/83C04B35/76C04B2235/425C04B2235/5216C04B2235/5248C04B2235/5208C04B2235/616C04B2235/605C04B2235/656C04B2235/6581C04B35/6263C04B35/80C04B41/009B60L5/24C01B32/05Y02T90/16C04B41/4515C04B41/4517
Inventor 魏文赋廖前华吴广宁杨泽锋左浩梓高国强
Owner SOUTHWEST JIAOTONG UNIV
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