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A device and method for reducing contact bounce for a vacuum circuit breaker

A vacuum circuit breaker and contact bouncing technology, applied in high-voltage air circuit breakers, circuits, high-voltage/high-current switches, etc., can solve the problems of decreasing closing speed and increasing bouncing time, so as to reduce the degree of bouncing and reduce the The effect of contact bouncing and simple device structure

Active Publication Date: 2018-11-20
BEIJING CED RAILWAY ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In many current vacuum circuit breakers, there is often a contradiction between the closing speed, breaking speed and bounce time of the moving and static contacts. It will also lead to an increase in the bounce time, so it is necessary to study a method and device that can reduce the contact bounce while ensuring the breaking and closing speed

Method used

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  • A device and method for reducing contact bounce for a vacuum circuit breaker

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specific Embodiment approach

[0017] The device for reducing contact bouncing of the vacuum circuit breaker according to the present invention is preferably implemented in the following manner:

[0018] Including vacuum tube, limit sleeve, connection block, overtravel spring, transmission disc, spacer column, spring seat, compression ring and return spring;

[0019] The return spring is installed on the upper end surface of the vacuum tube through the limiting sleeve and the spring seat, the pressing ring is installed above the spring seat and connected to the vacuum tube at the same time, and the connecting ring is sequentially installed above the pressing ring. block and an overtravel spring, and the drive plate is fastened to the spring seat through the spacer column and bolts while positioning the overtravel spring.

[0020] The return spring includes any one of the following: conical springs, variable stiffness springs, variable wire diameter springs, and multiple sets of cylindrical nested springs. ...

specific Embodiment

[0027] Such as figure 1 As shown, the device for reducing contact bounce of the vacuum circuit breaker of the present invention includes a vacuum tube 1, a limit sleeve 2, a connecting block 3, an overtravel spring 4, a transmission disc 5, a spacer column 6, a spring seat 7, a pressing Ring 8 and return spring 9; wherein, the upper end surface of vacuum tube 1 is installed with return spring 9 through the limit sleeve 2 and spring seat 7, and the pressing ring 8 is installed on the top of spring seat 7 while connecting the moving contact of vacuum tube 1, spring seat 7 and The compression rings 8 can slide relative to each other, and the connection block 3 and the overtravel spring 4 are sequentially installed on the top of the compression ring 8. The lower end surface of the connection block 3 is in close contact with the upper end surface of the moving contact of the vacuum tube 1, and the transmission disc 5 is positioned on the overtravel spring 4 At the same time, the sp...

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Abstract

The invention discloses a method and device for reducing the contact bounce of a vacuum circuit breaker. The device comprises a vacuum tube, and a limit stop sleeve, a connection block, an overrun spring, a transmission disc, a spacer column, a spring seat, a compression ring and a return spring; the return spring is mounted on the top surface of the vacuum tube through the limit stop sleeve and the spring seat, the compression ring is arranged above the spring seat and is connected with the vacuum tube at the same time, the connection block and the overrun spring are arranged in sequence above the compression ring, the transmission disc positions the overrun spring and is fastened with the spring seat through the spacer column and the screw bolt. The value of the compression force near the bottom is far greater than the value of the compression force on the top during the compression process of the return spring. The initial pressure of the overrun spring and the contact closure force of the vacuum tube are in a proportional relationship, the ratio range is 1 / 3-1 / 2. The device is simple in structure, flexible and extremely versatile; the device can reduce the extent of the contact bounce while ensuring the breaking and closing speed and can find the balance point among the movement and static contact closure speed, breaking speed and jump time, and is strong in stability.

Description

technical field [0001] The invention relates to a vehicle-mounted vacuum circuit breaker for 25kV electrified railways, in particular to a device and method for reducing contact bouncing of the vacuum circuit breaker. Background technique [0002] The vacuum circuit breaker is the main switch for electrical connection or disconnection between the electric locomotive and the motor car and the catenary. During operation, the vacuum circuit breaker needs to be able to cut off the main power supply of the vehicle quickly, reliably and safely in order to effectively protect the electrical equipment of the vehicle. [0003] The closing and breaking of the vacuum circuit breaker is actually the contact and disconnection of the dynamic and static contacts in the vacuum bag. Since the vacuum circuit breaker is a live switchgear, in the case of high voltage, the contact and disconnection of the dynamic and static contacts must be It must be completed in a very short time, otherwise fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/664H01H33/66
CPCH01H33/66H01H33/664
Inventor 张东远王俊峰高文斌
Owner BEIJING CED RAILWAY ELECTRIC TECH
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