A kind of preparation method of carbon fiber reinforced pantograph carbon slide plate

Abstract

The invention discloses a preparation method of a carbon fiber strengthened pantograph type current collector carbon slide plate. The method comprises the following steps: (1) selecting the following raw materials in percentage by weight: 25 to 45% of mid-temperature pitch, 35 to 50% of graphite, 1 to 15% of carbon fiber, 1 to 10% of wollastonite and 1 to 15% of copper powder; (2) obtaining a graphite-pitch kneading mixture after continuously mixing, kneading and breaking the mid-temperature pitch and the graphite, and smashing the mixture at high speed; (3) after mixing the graphite-pitch kneading mixture, the carbon fiber, the wollastonite and the copper powder uniformly in a high-speed mixer, putting the mixture in a mold, and then hot-pressing the mixture in a press vulcanizer; (4) roasting a sample subjected to demolding; (5) putting the sample subjected to roasting and impregnating pitch in a reduced pressure distillation kettle to conduct vacuumizing pressurization and impregnation; and (6) repeating steps (4) to (5) for many times, carrying out mechanical processing after cooling, and then obtaining the carbon fiber strengthened pantograph type current collector carbon slide plate. The carbon fiber strengthened pantograph type current collector carbon slide plate disclosed by the invention is excellent in comprehensive properties such as electrical conductivity, abrasion resistance, self-lubrication performance and the like; and the manufacturing method is simple, so that the large-scale production can be realized.

Description

technical field [0001] The invention belongs to the technical field of electric locomotives, in particular to a method for preparing a carbon fiber reinforced pantograph carbon slide. Background technique [0002] Electric traction high-speed trains use the pantograph carbon slide plate system to continuously rub against the catenary wires to guide the current on the grid and transmit it to the locomotive power system to maintain the normal operation of the electric locomotive. Pantograph carbon slide is a kind of electrical contact material integrating high conductivity, anti-wear and anti-friction properties. Due to the long-term exposure of the pantograph carbon skateboard to the natural environment, it often works in dry, humid, even sandy, rainy and snowy weather. Moreover, during high-speed operation, the skateboard and catenary wires continuously generate electrical and mechanical shocks. Wear and tear, thus become the most frequently replaced and most consuming part...

AI Technical Summary

Problems solved by technology

However, carbon and graphite have a common disadvantage that the resistance is high. The resistance of the substrate after firing is generally 40-80mΩ·m, the compressive strength and impact strength are low, and there are many micro-cracks inside the product, and it is easy to break. , Excessive resistivity and easy heat generation lead to performance degradation and other problems, resulting in unstable product performance. The performance of carbon and graphite substrates is far from meeting the operating requirements of high-speed EMUs, and it is difficult to achieve mass production.

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