Flexible crawler-type pantograph head suitable for electric traction locomotive

Abstract

The invention discloses a flexible crawler-type pantograph head suitable for an electric traction locomotive. The flexible crawler-type pantograph head is characterized in that two metal rollers are arranged on a pantograph support, an insulating roller shaft is fixed on two roller supports, the two roller supports are fixed on the pantograph support, and the metal rollers are mounted on a rollershaft through two insulating bearings; a metal spring is arranged in at least one through hole in the roller shaft; a current collection carbon brush is fixed at each of the two ends, extending out ofthe through hole, of the metal spring; a flexible crawler belt is sleeved on the two metal rollers, more than one insulating supporting cylinder is arranged below the crawler belt, and the insulatingsupporting cylinder is structurally characterized in that a piston is fixed at the upper end of a movable supporting column and at the lower end of a supporting cylinder shaft and extends into an inner cavity of a supporting cylinder support to form an air cylinder, the supporting cylinder support is provided with a vent hole, and a limit spring is sleeved on the movable supporting column. The movable supporting column is arranged on the supporting cylinder support through a linear bearing. The flexible crawler-type pantograph head has the characteristics of good impact resistance, high current collection stability, large contact current collection area, low pantograph-catenary offline 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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