Urban rail transit rigid-flexible suspension catenary

Abstract

The invention discloses an urban rail transit rigid-flexible combination suspension catenary, which relates to the technical field of the urban rail transit catenary and mainly comprises three parts of a common section, an anchor section joint and a compensation device. The suspension part of common section consists of four parts: a bus bar, a contact wire, an electrical connection and a hanging string. The contact wire and bus bar are installed separately by hanging string. Two sets of catenary at the joint transition of the anchor section are arranged at the same height to ensure the safe passage of the train. The compensating part pulls the non-working support contact wire to the outside of the line through the steering pulley, and then realizes the tension compensation through the compensating rope, the movable pulley group, the drop tower and other structures. The invention separates and connects the contact wire and the bus bar through the hanging string, improves the elasticityof the catenary, and avoids the phenomenon that the contact wire jumps out of the bus bar clamping groove caused by the temperature change. At the joint of anchor segment, the elasticity of transitionarea and normal section of rigid-flexible combined catenary has little change, the elasticity uniformity is good, and the structure height is small, which is conducive to the pantograph stable and reliable current collection.

Description

technical field [0001] The invention relates to the technical field of urban rail transit catenary, in particular to a rigid-flexible suspension catenary for urban rail transit that can avoid contact line de-grooving, has high overall elasticity and sag performance, stable structure, and is conducive to the smooth transition of pantographs . Background technique [0002] In recent years, the convenience brought by urban rail transit to people's life and work is obvious to all. With the acceleration of people's life and work rhythm, people have put forward higher requirements for travel time, and further increase the speed of subway trains to save passengers' time. A key issue in the development of rail transit. [0003] To increase the running speed of urban rail trains, it is necessary to adopt DC 1500V or 3000V overhead power supply. At present, in the construction of urban rail transit, the subway lines in the city center are generally tunnel lines, and the DC 1500V, ov...

AI Technical Summary

Problems solved by technology

However, its structure is complex, its installation height is high, and it needs a large installation space, so it is generally not used in subway tunnel lines

The overhead rigid suspension catenary suitable for use in tunnels is affected by factors such as its poor elasticity and the inability to form the lift of the pantograph. When the vehicle is running at a high speed, pantograph-catenary offline arcing will occur , the maximum operating speed generally cannot exceed 120km / h

[0005] Although the rigid suspension catenary has the advantages of simple structure and easy maintenance, it also has the problem that hard spots are easy to occur in special sections such as busbar joints and anchor joints, which will increase the wear and tear of contact wires and pantograph slides; and due to The material of the contact wire and the bus bar is different, and the metal expansion coefficient is quite different. As the temperature changes, it is easy to have many problems such as the phenomenon that the contact wire jumps out of the bus bar clamp groove.

[0006] At present, some rigid suspension catenaries are limited by the height of subway tunnels, and busbars are still used to directly clamp the contact wires, so that the stiffness of the catenary is still very high, and there is no substantial improvement in the quality of the pantograph-catenary flow. Trains still can't run normally at higher speeds

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