Self-Lubricating Impregnated Cu Graphite Skateboard for Electric Locomotive Pantograph

Product Description

A:company profile

 L.T Group has a comprehensive product and technology portfolio that focuses on four field of graphite - ultrafine particle graphite mould,graphite electrode, graphite crucible, as well as other products mainly made of graphite.

 Graphite materials exhibit unique properties such as good electrical and thermal conductivity, heat and corrosion resistance, low friction, and reduced weight while at the same time maintaining high strength. Due to the shortage of energy and raw materials, our high performance products made from graphite are in increasingly high demand in industries. They also play a progressively important role in everyday life, thereby substituting traditional materials.
 

B:Pantograph skateboard application

 The electrical equipment used by electric traction locomotives to obtain electrical energy from the catenary is installed on the roof of the locomotive or motor car. The pantograph can be divided into single-arm bow and double-arm bow, both of which are composed of a skateboard, upper frame, lower arm rod (lower frame for double-arm bow), underframe, bow lifting spring, transmission cylinder, support insulator and other components. The diamond-shaped pantograph is also called the diamond pantograph. The smoothness of the load current passing through the contact surface of the contact wire and the pantograph slide is related to the contact pressure, transition resistance, and contact area between the slide and the contact wire, and depends on the interaction between the pantograph and the contact net.
 

C: Advantages of pantograph skateboard

 The pantograph is to get electricity through the contact between the sliding plate and the contact net. The sliding plate is generally made of graphite and other materials, so the contact net wear is relatively small, and the sliding plate is easy to replace after it is worn, and the cost is low. The cycle is generally about two weeks, and it can be replaced once a month if the quality is good. However, the high-speed rail speed is 300 kilometers per hour, and the wind resistance of the pantograph is very large, so the design is very particular, not only to make it solid and reliable, but also to make it as light as possible.


D:Classification of pantograph charcoal skateboard

 The pantograph sliding plate is a part of the pantograph head and directly contacts the contact wire. According to the material, it can be divided into pure metal sliding plate, powder metallurgy sliding plate, pure carbon sliding plate and immersed metal sliding plate.

 Where the pantograph of electric locomotive contacts the wire, there are currently three materials in use in our country: 1. Pure carbon graphite slide plate 2. Metal-impregnated carbon slide plate 3. Powder metallurgy slide plate. However, due to the powder metallurgy sliding plate, the copper wire is seriously worn. Therefore, it has been basically replaced by the first two skateboards.
 

 (1) Pure carbon graphite slide
A certain proportion of pitch coke, petroleum coke, graphite powder, carbon black or hard carbon is mixed with each other, and then pressed into a high-temperature sintering furnace for roasting. The product can be applied after reprocessing. Although pure carbon slides are hard, brittle and easy to break, they are widely used because of their self-lubricating ability and good anti-wear properties.

 (2) Metal-impregnated carbon skateboard
This type of skateboard not only combines the high mechanical strength and low resistance of powder metallurgy skateboards, but also combines the self-lubricating ability of pure carbon skateboards and the characteristics of less wear on overhead contact nets. In theory, it is the most ideal material for skateboards.

 (3) Powder metallurgy skateboard
Using metal (iron, copper) raw materials and non-metallic powders (carbon, lead, molybdenum disulfide, etc.) as auxiliary lubricants, they are mixed with each other and then pressed into shape. After high temperature sintering, they are immersed in lubricating oil, and finally machined into shape. The processing process is similar to Ceramic firing, the surface hardness of the pantograph produced by it is high, and it is not easy to appear fracture and uneven wear. Compared with pure metal skateboards, it has its own lubrication effect.