Charging device for circuit breaker hydraulic operating mechanism

Abstract

The invention discloses an energy charger applied to a hydraulic operation mechanism of a breaker, including a working cylinder, and at least two energy charging groups installed on the working cylinder. Each energy charging group comprises a motor. The working cylinder is provided with at least two low pressure oil pockets. After the motors are installed on the working cylinder, the motors and the low pressure oil pockets form sealed energy charging oil chambers respectively. Each motor drives eccentric shafts to rotate through a transmission device, and two sides of each eccentric shaft are symmetrically provided with an energy charging oil pump. The working cylinder is provided with high pressure oil channels at positions corresponding to the energy charging oil pumps. The working cylinder is also provided with low pressure oil channels. The high pressure oil channels are communicated with a normal high pressure oil chamber of the hydraulic operation mechanism, and the low pressure oil channels are communicated with a normal low pressure oil chamber of the hydraulic operation mechanism. The high pressure oil channels and the low pressure oil channels are communicated with the energy charging oil chambers respectively. The energy charger can provide the enough large oil charging amount, is safe and reliable in transmission.

Description

【Technical field】 [0001] The invention relates to the technical field of circuit breakers, in particular to an energy charging device for a hydraulic operating mechanism of a circuit breaker. 【Background technique】 [0002] The hydraulic operating mechanism of the circuit breaker must have an energy charging system, which drives the oil pump to inject hydraulic oil into the accumulator through the motor, and converts electrical energy into hydraulic energy. [0003] In the charging system of the existing hydraulic operating mechanism, a single motor drives the eccentric shaft to rotate through gear reduction, and the rotation of the eccentric shaft causes an oil pump to reciprocate to discharge oil for charging. However, with the continuous increase of the operating power of the hydraulic operating mechanism, the oil filling amount of the charging system is also continuously increased according to the requirements. At present, the conventional method to solve the problem of...

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Problems solved by technology

[0004] However, after the above solutions reach a certain level, the following disadvantages will appear: first, the diameter of the oil pump plunger increases, which increases the volume and weight of the oil pump, the stroke of the oil pump plunger increases, and the diameter and eccentricity of the eccentric shaft increase, resulting in The volume of the entire oil filling device and the pulsating power of the eccentric shaft increase, and the transmission and safety performance of the oil filling device decrease; secondly, with the increase of the relevant parameters and performance of the oil pump and related parts, the power of the motor increases correspondingly, and the charging efficiency decreases. At the same time, the life of the motor is also reduced

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