Spring operating mechanism cooperated with 126kV vacuum circuit breaker separation-integration characteristic

A vacuum circuit breaker and operating mechanism technology, applied in the direction of high-voltage air circuit breakers, circuits, electrical components, etc., can solve the problems of high machining accuracy of parts and complex structure of spring operating mechanism, etc., to achieve superior performance, reliability, It is beneficial to extinguish and reduce the effect of opening and closing work

Inactive Publication Date: 2008-12-03
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other types of operating mechanisms, the structure of the spring operating mechanism is more complicated, and the requirements for the machining accuracy of the parts are higher

Method used

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  • Spring operating mechanism cooperated with 126kV vacuum circuit breaker separation-integration characteristic
  • Spring operating mechanism cooperated with 126kV vacuum circuit breaker separation-integration characteristic
  • Spring operating mechanism cooperated with 126kV vacuum circuit breaker separation-integration characteristic

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Experimental program
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Embodiment Construction

[0015] refer to figure 1 As shown, a buffer 4 is placed inside the opening spring 1, and the opening spring 1 is connected to the output shaft 5 on one side of the outer toggle arm to drive the output shaft 5 to rotate, and the other side of the outer toggle arm is connected to the mechanism pull rod 8. The closing spring 2 is connected with the energy storage shaft 6 to drive the cam 3 to rotate, and the cam 3 is in contact with the roller 7 on the output shaft 5 . The spring operating mechanism is connected to the crank arm on the intermediate phase main shaft 9 of the circuit breaker through the mechanism pull rod 8, and the intermediate phase main shaft 9 drives the other two-phase main shafts to rotate through the horizontal pull rod 33. Three-phase insulating pull rods 10 are respectively connected to the main shaft arms of each phase, and the other end is connected to the moving contact 12 through the contact spring 11, and the static contact 13 is fixed, so that the sp...

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Abstract

The invention relates to a spring operating mechanism matched with a 126kV vacuum high-voltage circuit breaker, the invention designs the contour trajectory of a cam to achieve the best match of the output characteristics and the load characteristics; when in closing process, the speed at instant of touching is controlled in the reasonable range to effectively reduce the closing bounces, and the mechanism can also be ensured to overcome the reaction force of a contact spring at the end of the closing; the design of the size and the position of an oil drain hole on a wall of a buffer can allow the circuit breaker to ensure higher speed at instant of touching during the opening process to allow an arc-extinguishing chamber to rapidly enter the short arcing time, thus allowing the average speed to be maintained within a certain range, ensuring the long arcing time of the circuit breaker and further being conductive to the arc extinguishment; the spring operating mechanism can solve the problem of poor match of the output force of the mechanism in the past with the load characteristics of the vacuum circuit breaker, reasonably distribute energy to the overall motion process of the circuit breaker and reduce the opening and closing works of the mechanism.

Description

technical field [0001] The invention relates to a mechanical transmission device for switching on and off of a high-voltage vacuum circuit breaker, in particular to a spring operating mechanism matching the speed characteristics and load characteristics of a 126kV vacuum circuit breaker. Background technique [0002] At present, SF6 circuit breakers occupy an absolute dominant position in the field of high voltage and ultra-high voltage, so most high-voltage operating mechanisms are designed to match the opening and closing characteristics of SF6 circuit breakers. At present, with the continuous improvement of the technical level of high-voltage AC vacuum circuit breakers and the continuous expansion of market demand, the demand for a matching superior and reliable operating mechanism on the vacuum circuit breaker is increasingly urgent. [0003] The spring operating mechanism is the most widely used operating mechanism in vacuum circuit breakers. It has the advantages of sm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/666H01H33/664
Inventor 耿英三余砾王建华刘志远姚建军
Owner XI AN JIAOTONG UNIV
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