Self-lubricating modular metal roller electric locomotive pantograph head with damping structure

Abstract

The invention provides a self-lubricating modular metal roller electric locomotive pantograph head with a damping structure. Pure carbon sliding plates are arranged on the two upper end surfaces of aU-shaped insulating base, and more than one group of metal rollers are arranged on the horizontal bottom plate of the base; the setting mode of each group of metal rollers is as follows: the lower parts of every two T-shaped insulating supports extend into grooves of a horizontal bottom plate respectively, and are arranged on fixing bolts which are screwed into the outer side of the horizontal bottom plate through holes in the horizontal bottom plate, spring damping mechanisms are symmetrically arranged on the left side and the right side of each insulating support, and the two metal rollers are arranged between the two supports through fixing shafts; and the structure of the metal rollers are is characterized in that the metal cylinders sleeve the metal shafts through insulating bearings,annular current-receiving electric brushes are fixed on the metal shafts, and the outer surfaces of the annular current-receiving electric brushes are in contact with the inner walls of the metal rollers. The self-lubricating modular metal roller electric locomotive pantograph head has the self-lubricating effect, is in flexible contact with an arch net and forms rolling friction fit, and has thecharacteristics of being capable of adapting to requirements of traction power of a train, being longer in service life and the like.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a pantograph bow head for electric traction locomotives such as subway light rails. Background technique [0002] Electric traction locomotives usually use "pantograph-catenary" to contact each other to transmit electric energy. Usually, the pantograph is installed on the top of the train car and supports a single or multiple carbon slides, and the catenary is suspended above the roof by the towers set along the railway line, and the electrical energy passes through the pantograph in contact with the carbon slides through the catenary. transmitted to the car. The pantograph-catenary system is the key for the train to obtain stable electric energy. [0003] In order to make the friction between the contact line and the surface of the carbon skateboard as uniform as possible during the running process of the train, the poles and towers for suspending the contact line are gen...

AI Technical Summary

Problems solved by technology

[0004] The existing pantograph is in contact with the contact line arranged in a "Z" shape to receive current. During the high-speed operation of the train, there will be high-speed relative motion between the pantograph and the catenary, and severe impact will occur when encountering a hard point of the catenary, resulting in a small current contact area. Even if the phenomenon of arcing occurs, arc ablation damage will occur on the surface of the carbon skateboard, which will affect the current receiving effect and service life of the skateboard

At the same time, although the traditional skateboard will have lateral displacement when it is in frictional contact with the contact line, in terms of actual use, the lateral effective use area of ​​the skateboard is only in the "contact sweet spot", and the contact area does not cover the entire skateboard, resulting in a high utilization rate of the skateboard material. Limited, even when the skateboard is scrapped, about 20% of the surface of the skateboard is never in contact with the contact line

The impact caused by the high-speed relative movement of the car network mainly acts on the effective use area of ​​the skateboard. Factors such as arc erosion and mechanical impact make the wear of the skateboard in the effective area intensified, which seriously affects the service life of the skateboard and the use efficiency of materials.

[0005] There are still several bottleneck problems that need to be solved urgently in the existing pantograph carbon skateboards: (1) The materials of the carbon skateboards are not fully utilized, and a large amount of labor costs are required to replace the worn out carbon skateboards on a regular basis; (2) During the high-speed operation of the train Among them, the abrasion of the carbon skateboard is particularly serious. Under the high-speed operation of the train, the flexible friction between the carbon skateboard and the contact wire at low speed gradually evolves into a rigid impact between the contact wire and the carbon skateboard. Rigid impact can easily cause the carbon skateboard to collapse. The edge collapse of the skateboard reduces the surface area of ​​the skateboard, and the reduction of the contact area of ​​the "contact line-carbon skateboard" directly leads to a sharp increase in the current density in the local contact area, followed by a sharp increase in Joule heat, which accelerates the aging of the skateboard.

The more damaged areas, the more limited the contact surface, forming a vicious circle; (3) When the train is running at high speed, the performance of the carbon skateboard following the contact line is not good, and the pantograph-network off-line rate increases, which will lead to frequent arcing between the contact line and the carbon skateboard And it will cause unstable flow between the skateboard and the contact wire to generate arc, which will cause ablation on the surface and interior of the skateboard and accelerate the aging of the skateboard; (4) the existing pantograph-catenary system equipped with carbon skateboard is mainly used When it is used for the rigid catenary, it is easy to cause the skateboard to wear too fast at the rigid suspension joints, large bends in the rigid section, and rigid segmental insulators. At the same time, it also causes uneven wear of the contact wires and affects train operation.

(5) When the relative friction between the carbon skateboard and the contact line occurs, the sliding friction is serious, especially under extreme weather conditions, the traditional carbon skateboard has poor wear resistance and impact resistance. In addition, in the case of ice and snow, the ice coating on the surface of the contact line may have a mechanical impact with the carbon skateboard, causing the skateboard to be damaged or even broken.

(6) The number of carbon skateboards in the existing pantograph-catenary system is fixed, and it is difficult to adapt to changes in the traction power demand of trains by increasing or decreasing the number of skateboards, and it is difficult to meet the needs of increased speed and traction power of electric traction locomotives

[0009] Both of the above two have changed pantograph-catenary contact sliding friction into rolling friction, but there are still areas to be improved and perfected in the design of the drum structure of the two.

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