Preparation method of C/C (carbon/carbon) composite material slider for pantograph

A technology of composite materials and pantographs, which is applied in the field of material preparation for electric locomotives, can solve problems such as unstable performance, poor mechanical strength of pure carbon slides, and high resistivity, and achieve excellent mechanical properties, high material utilization, and reduced resistance rate effect

Active Publication Date: 2015-06-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a pantograph C / C with excellent mechanical properties, low resistivity and stable and reliable performance for the problems of poor mechanical strength, high resistivity and unstable performance of existing pure carbon slides Sliding bar and its preparation method

Method used

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  • Preparation method of C/C (carbon/carbon) composite material slider for pantograph
  • Preparation method of C/C (carbon/carbon) composite material slider for pantograph
  • Preparation method of C/C (carbon/carbon) composite material slider for pantograph

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Using 2.5D carbon fiber needle-punched integral mat with a cloth-to-felt ratio of 8:2 as the prefabricated body, a density of 1.42 g / cm was prepared by chemical vapor infiltration. 3 The C / C porous body with a density of 1.82g / cm3 was prepared through three resin impregnation-carbonization processes. 3 The C / C composite material obtained by 2000°C high-temperature heat treatment and mechanical processing obtained the C / C slider.

[0058] The C / C pantograph carbon slider in this example is mainly prepared through the following steps:

[0059] (1) First of all, the PAN type T700 (12K) carbon fiber produced by Japan's Toray Company (Toray) is used to make the mesh tire and the non-weft cloth, ensuring that the mass ratio of the non-weft cloth and the mesh tire is 8:2, and the single-layer 0° no-weft fabric, mesh layer, 90° no-weft fabric, and mesh layer are stacked in sequence, and then, the density is 0.56g / cm by the method of relay needle punching 3 Carbon fiber prefab...

Embodiment 2

[0067] Using 2.5D carbon fiber needle-punched integral mat with a cloth-to-felt ratio of 8:2 as the prefabricated body, a density of 1.51 g / cm was prepared by chemical vapor infiltration. 3 The C / C composite material with a density of 1.76g / cm was prepared through two resin impregnation-carbonization processes. 3 The C / C composite material obtained by 2300 ℃ high temperature heat treatment and machining to obtain the C / C slider.

[0068] The C / C pantograph slider in this example is mainly prepared through the following steps:

[0069] (1) First of all, the PAN type T700 (12K) carbon fiber produced by Japan's Toray Company (Toray) is used to make the mesh tire and the non-weft cloth, ensuring that the mass ratio of the non-weft cloth and the mesh tire is 8:2, and the single-layer 0° no-weft cloth, mesh layer, 90° no-weft cloth, and mesh layer are stacked in sequence, and then, the density is 0.35g / cm by the method of relay needle punching 3 carbon fiber prefabricated body, 10...

Embodiment 3

[0077] Using 2.5D carbon fiber needle-punched integral mat with a cloth-to-felt ratio of 8:2 as the prefabricated body, a density of 1.65 g / cm was prepared by chemical vapor infiltration. 3 The C / C composite material with a density of 1.85g / cm was prepared after two asphalt impregnation-carbonization processes 3 The C / C composite material obtained by 2300 ℃ high temperature heat treatment and machining to obtain the C / C slider.

[0078] The C / C pantograph slider in this example is mainly prepared through the following steps:

[0079] (1) First of all, the PAN type T700 (12K) carbon fiber produced by Japan's Toray Company (Toray) is used to make the mesh tire and the non-weft cloth, ensuring that the mass ratio of the non-weft cloth and the mesh tire is 8:2, and the single-layer 0° no-weft fabric, mesh layer, 90° no-weft fabric, and mesh layer are stacked in sequence, and then, the density is 0.56g / cm by the method of relay needle punching 3 The carbon fiber prefabricated bod...

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Abstract

The invention relates to a preparation method of a C/C (carbon/carbon) composite material slider for a pantograph, and belongs to the technical field of preparation of materials for electric locomotives. The preparation method comprises the following steps of: according to the weight ratio of carbon cloth and carbon felt of (7.5-9): (3-1), circularly overlapping single layer 0-degree weft-free carbon cloth, carbon fiber web tire, 90-degree weft-free carbon cloth and carbon fiber web tire sequentially, and introducing carbon fiber bundles in the direction vertical to the spread by a relay type acupuncture method to form a 2.5D carbon fiber acupuncture integrated felt with density of 0.3-0.6g/cm<3>; performing high-temperature pre-treatment at 1500-2100 degrees centigrade, and performing chemical vapor deposition pyrolytic carbon treatment until obtaining the C/C composite material with the density of 1.4-1.6g/cm<3>; machining according to predetermined size, performing polymer dipping-carbonizing treatment and graphitization treatment sequentially, and then machining according to designed size, so as to obtain a product. The process is simple, a product has excellent mechanical and electrical properties, and the industrial application is prompted.

Description

technical field [0001] The invention relates to a method for manufacturing a C / C composite material slide bar for a pantograph, and belongs to the technical field of material preparation for electric locomotives. Background technique [0002] Electric traction high-speed trains use the carbon sliders on the pantograph carbon slides to frictionally contact with the catenary wires to transmit the current on the power grid to the locomotive power system, thereby supplying power to the high-speed train and maintaining the normal operation of the locomotive. In order to realize the above functions, the pantograph carbon slider must have low electrical resistivity and good wear resistance. [0003] During the high-speed operation of the train, due to the vibration of the network cable, the carbon slider is often impacted by the grid, especially when passing through the "hard point" of the grid, the impact of the carbon slider on the pantograph slide is more serious, sometimes The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 肖鹏逯雨海
Owner CENT SOUTH UNIV
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