A modular transmission device for measuring the speed of the main shaft of a vacuum circuit breaker

Abstract

The invention provides a modular transmission device for measuring the speed of a main shaft of a vacuum circuit breaker, which comprises a main shaft transition joint, a first gear box, a second gear box, a third gear box body and an angular velocity sensor. Bolts, one side of the main shaft transition joint is connected to the main shaft of the circuit breaker, and the other end of the main shaft transition joint is connected to the first gear box through the output shaft; one end of the first gear box is driven by the first telescopic adjustment shaft connected to the second gearbox. In the present invention, the movable design of the components improves the compatibility of the old circuit breaker with the size of the angular velocity sensor. The design of the retractable transmission shaft increases the flexibility of the installation of the angular velocity sensor. Sensors of any size can be installed inside the circuit breaker. The present invention is very friendly to the upgrading of traditional circuit breakers, has practical value, and can bring economic benefits.

Description

technical field [0001] The invention relates to the field of vacuum circuit breakers, in particular to a modular transmission device for measuring the speed of a main shaft of a vacuum circuit breaker. Background technique [0002] High-voltage circuit breakers are the most important switchgear in the power system. It is responsible for the functions of control and protection, that is, it is used to reliably put in or cut off the corresponding lines or electrical equipment according to the needs of the operation of the power grid. The mechanical structure of circuit breakers is complex, and frequent actions and unscientific maintenance will reduce its reliability, causing hidden dangers and losses. Mechanical failure of circuit breakers is one of the main and most common faults in power systems. Some circuit breakers, such as the capacitor switching circuit breaker in the 10kV compensation cabinet, have more actions and higher failure probability. Therefore, both at home ...

AI Technical Summary

Problems solved by technology

[0003] However, since most circuit breaker manufacturers consider the demand for offline testing of the circuit breaker's action speed when designing and producing circuit breakers, they leave holes in the side panels of the box so that the angular velocity sensor can be installed outside the box. The project test can be carried out after the vacuum circuit breaker is pulled out of the switch cabinet. The angular velocity sensor has different sizes, and it needs to be installed through a transition joint when it is connected to the main shaft.

The structure of the circuit breaker is compact, the distance between the main shaft and the side baffle is very close, and the space is very small. The sensor and the transition joint cannot be placed inside the box. Therefore, this invention proposes a modular transmission device for the speed measurement of the main shaft of the vacuum circuit breaker according to the above problems.

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