Carbon base composite material for collector shoe sliding block and its preparation method

A composite material and current collector technology, which is applied to conductive materials, current collectors, power current collectors and other directions dispersed in non-conductive inorganic materials, can solve problems such as different friction pair materials, and achieve a small friction coefficient and a simple preparation process. , the effect of low cost

Inactive Publication Date: 2008-04-23
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apparently, due to the different ways of receiving electricity and the materials of the friction pairs, the material of the above-mentioned pantograph slide plate is not suitable for direct use as the material of the slider of the current collector.

Method used

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  • Carbon base composite material for collector shoe sliding block and its preparation method

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preparation example Construction

[0026] A method for preparing a carbon-based composite material for a collector slider of the present invention comprises the following steps:

[0027] (1) Pre-baking process: loosen the graphite and coke powder, and dry them in an oven to remove the moisture adsorbed on the particles. The drying temperature is 100°C, and the drying time is 2 to 4 hours.

[0028] (2) Mixing process: first fully mix chopped carbon fiber, self-curing phenolic resin, graphite, coke, or a mixture of the two, and then add copper powder, copper fiber, or both. The mixture is roughly dispersed, and the dispersion time is preferably 1 to 10 minutes.

[0029] (3) Pressing process: the carbon-based composite material used for the receiver slider is formed by hot pressing. Put the mixed material into the mold, pressurize and heat until solidified. The molding pressure is 30-100MPa, the molding temperature is 160-200°C, and the molding time is 0.5-2 hours.

[0030] (4) Post-treatment process: the hot-...

Embodiment 1

[0033] 5% of graphite and 45% of coke powder are used in the carbon-based composite material of the collector slider. After drying for 2 hours at 100°C in a drying oven, add 3% of carbon fiber and 27% of self-curing phenolic resin, mix well, and then add 5% copper powder and 15% copper fiber were dispersed, and the dispersion time was 5 minutes. Put the dispersed material into the mold, pressurize and heat until solidified, the pressure is 50MPa, the temperature is 200°C, and the molding time is 0.5 hours. The prepared slider material has a density of 2.08g / cm3, a resistivity of 9.6×10-6Ω·m, a bending strength of 68MPa and a friction coefficient of 0.13.

Embodiment 2

[0035] 15% of graphite and 45% of coke powder are used in the carbon-based composite material of the collector slider. After drying in a drying oven at 100°C for 2 hours, add 5% of carbon fiber and 15% of self-curing phenolic resin, mix well, and then add Copper powder 20%, for dispersion, dispersion time 8 minutes. Put the dispersed material into the mold, pressurize and heat until solidified, the pressure is 80 MPa, the temperature is 170°C, and the molding time is 1 hour. The prepared slider material has a density of 2.23g / cm3, a resistivity of 4.5×10-6Ω·m, a bending strength of 75MPa and a friction coefficient of 0.08.

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Abstract

The invention comprises: using the one of graphite and coke materials or their mixture as basal body; it has 40%-60% of total component mass percent; using the chopped carbon fiber as the reinforcing agent, which has 1%-5% of total component mass percent; using the self-solidifying phenolic resin as the bonding agent, which has 15-30% of total component mass percent; using the one of copper powder and copper fiber or their mixture as conducting component, which has 5-30% of total component mass percent. The fabrication method comprises: 1) pre-drying; 2) blending procedure; 3) pressing procedure; 4) post-processing procedure.

Description

(1) Technical field: [0001] The invention relates to a carbon-based composite material for a vehicle current collector slide block suitable for conducting rails to receive electricity for subways and light rails and a preparation method thereof, and belongs to the technical field of carbon-based composite materials. (two) background technology: [0002] There are two ways to receive electricity for urban rail vehicles: overhead catenary and conductive rail. Conductive rail power receiving system is receiving more and more attention and application because of its easy installation, convenient maintenance, long life and small environmental impact. The current receiver slider is the key collector element of the conductor rail power receiving system, and it is in sliding contact with the conductor rail for a long time, so the slider material is required not only to have good electrical conductivity, but also to have high mechanical strength and a small friction coefficient , an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/06H01B1/22B60L5/38C04B35/76C04B35/52C04B35/622
Inventor 罗瑞盈李密丹孙军杰
Owner BEIHANG UNIV
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