A flexible crawler pantograph bow suitable for electric traction locomotives

Abstract

A flexible tracked pantograph head suitable for electric traction locomotives, two metal rollers are set on the pantograph bracket, the insulating roller shaft is fixed on the two roller brackets, and the two roller brackets are fixed on the pantograph bracket , the metal drum is installed on the drum shaft through two insulating bearings, and a metal spring is arranged in at least one through hole on the drum shaft, and a current receiving carbon brush is respectively fixed on the two ends of the metal spring extending out of the through hole; On the metal drum, more than one insulating support cylinder is set under the track. The structure of the insulating support cylinder is: the upper end of the movable support is fixed to the support cylinder shaft and the lower end is fixed to the piston. The piston extends into the inner cavity of the support cylinder to form a cylinder. There is a vent hole, the limit spring coil is set on the movable support, and the movable support is arranged on the supporting tube bracket through the linear bearing. The invention has the characteristics of good impact resistance of the carbon slide plate, high flow receiving stability, large contact and flow receiving area, low pantograph-catenary off-line rate and the like.

Description

technical field [0001] The invention relates to the technical field of rail transit current collection, in particular to a flexible pantograph bow head of an electric traction locomotive. Background technique [0002] Electric traction locomotives usually use the pantograph to contact the contact wire to realize the current receiving. The pantograph is installed on the roof, and the contact wire is mostly supported by the pole next to the track above the roof. The pantograph lifts the bow in contact with the contact wire, and the carbon slide plate held up by the bow head of the train obtains current through sliding contact with the contact wire during the operation of the train, so as to realize the power transmission of the train. The good and stable contact between the pantograph and the catenary is the key to the stability of the locomotive. The key to flow. [0003] With the vigorous development of my country's high-speed railways, electric traction locomotives are dev...

AI Technical Summary

Problems solved by technology

[0004] There are still many problems to be solved in the traditional pantograph carbon slide: (1) Since the carbon slide is rigid, especially when the train is running at high speed, it is easy to produce severe mechanical impact when it passes through the contact wire suspension hard point, and the mechanical impact It is easy to cause the carbon skateboard to collapse and fall off. When the pantograph is in contact with the carbon skateboard, the wear of the carbon skateboard is serious, the impact of the pantograph is strong, and the efficiency is reduced when the working environment is harsh. There will be an arc between the pantograph and the contact wire, which will seriously affect the current flow. At the same time, arcing will also cause grid voltage fluctuations and affect the quality of traction power supply. These factors will shorten the life of carbon skateboards, and frequent replacement of carbon skateboards will increase train operating costs.

(2) When running at high speed, the off-line rate of the rigid carbon skateboard is high, causing arcing between pantograph and catenary, which affects the stability of current receiving and the quality of power supply

(3) Most of the contact lines in the existing high-speed rail lines are distributed in a "Z" shape, which can expand the contact range between the "one"-shaped carbon slide and the contact line. However, in order to prevent falling off, the carbon slide can really contact the contact line Only 60%-70% of the carbon skateboard is the so-called "sweet spot"; in order to prevent the carbon skateboard bracket from hurting the catenary, about 20% of the material is left at both ends of the carbon skateboard, and this part of the material has no chance to contact the catenary. Therefore, when the service period of carbon skateboards ends, there are still about 30%-40% of the skateboards that have not been in contact with the catenary, resulting in waste of materials

(4) Pantograph-catenary system is multi-purpose and flexible catenary. For urban rail and subway lines, the wear and tear caused by the rigid catenary to the carbon skateboard will be more serious, which will affect the stability of the flow.

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