Preparation method of composite pantograph pan of electric locomotive

Abstract

The invention discloses a preparation method of a composite pantograph pan of an electric locomotive. The preparation method comprises the following steps of (1), uniformly mixing silicon carbide powder, pitch coke powder and graphite powder, then adding molten high-temperature pitch, uniformly mixing at 130 to 150 DEG C, subsequently, cooling, and grinding a cooled mixture into powder with the granularity of 350 to 400 meshes, wherein the contents, in parts by weight, of the silicon carbide powder, the pitch coke powder, the graphite powder and the high-temperature pitch are 5 to 15 parts, 50to 60 parts, 5 to 10 parts and 25 to 30 parts respectively; (2), uniformly dispersing uniformly dispersed reduced graphene oxide dispersion liquid onto the powder obtained in the step (1) through spray drying; (3), predrying the powder obtained in the step (2), curing at 150 to 160 DEG C, enabling the cured powder to pass through a screw extruder, extruding to obtain a carbon pan blank of a required specification, roasting the carbon pan blank, and then discharging from a furnace, so that the composite pan is obtained. The preparation method provided by the invention is brief in process; a product is excellent in performance and good in self-lubricating property, further, does not damage a conducting wire, and is suitable to massively produce, and production equipment is simple.

Description

technical field [0001] The invention belongs to the field of electric locomotive pantograph slide plates, and in particular relates to a preparation method of electric locomotive pantograph composite slide plates. technical background [0002] The pantograph slide is a key part in the catenary system, which is installed on the top of the pantograph and directly contacts with the catenary wire to obtain electric energy for the electric locomotive. Due to its unique working principle and harsh working environment , has very strict requirements on material selection, and the pantograph slide generally needs to meet the following requirements: good electrical conductivity, good arc burn resistance, high anti-friction and wear resistance, good environmental adaptability, etc. The current-carrying friction and wear of the slide plate and the wire is not only related to the mechanism of sliding friction and wear between materials that are compatible with each other, but also involv...

AI Technical Summary

Problems solved by technology

However, they all have their own problems. The pure metal slide plate wears seriously on the catenary wire; the pure carbon slide plate has low resistance, good self-lubricating performance and anti-friction performance, little wear on the catenary wire, and is resistant to corrosion and high temperature, but its mechanical strength is low. , poor impact resistance, especially when encountering hard wires, it is easy to cause the skateboard to break and crack; the impact resistance of metal-impregnated carbon skateboards is insufficient, and it is prone to block falling, which is more serious for wire wear; carbon skateboards are prepared using composite materials It has great advantages, especially the copper-based composite skateboard, but this kind of skateboard also has problems such as low strength and poor wear resistance

[0004] With the continuous development of railway electrification and high speed, the requirements for skateboard materials are constantly increasing. Simply using a carbon material can no longer meet the current requirements, and it is urgent to develop new skateboards.