Switchgear

Abstract

The invention relates to a switch cabinet which comprises a cabinet. Moving contacts, static contacts and hydraulic operating mechanisms for driving the moving contacts to act are arranged in the cabinet, power portions of the hydraulic operating mechanisms comprise motors and pumps, the pumps comprise pump bodies, rotors are arranged in the pump bodies, the cross section of each rotor has two tangent points with a cylindrical inner hole, liquid inlet holes and liquid outlet holes which are separated from one another by partition plates are formed in the pump bodies, one end of each partition plate is in slide pushing fit with the peripheral surface of the corresponding rotor, oil guide channels are arranged at two ends of the long-diameter direction of each rotor, two peripheral sides of each rotor are communicated with each other via the corresponding oil guide channels, plugging blocks are further movably assembled in the rotors in a guide manner along the long-diameter directions of the rotors and have first locations and second locations in movement stroke of the plugging blocks, the oil guide channels can be avoided by the plugging blocks at the first locations, the plugging blocks at the second locations can move outwardly under the effect of centrifugal force to plug the oil guide channels, springs are arranged on the rotors, and acting force can be applied to the plugging blocks by the springs, so that the plugging blocks can be forced to be positioned at the first locations. The switch cabinet has the advantage that starting load of the motors can be reduced.

Description

technical field [0001] The invention relates to a switchgear in electrical equipment. Background technique [0002] As a common electrical equipment, the switchgear is widely used. The switchgear includes a cabinet and a moving contact and a static contact arranged in the cabinet. The cabinet is also equipped with a transmission connection with the moving contact to drive the moving contact. The hydraulic operating mechanism that realizes the opening and closing of the moving contact and the static contact through the movement of the head. The power part of the hydraulic operating mechanism includes a motor and a pump. The performance of the motor and the pump determines the performance of the hydraulic operating mechanism on the one hand. Performance, Chinese patent CN101749228A discloses a high-efficiency "pump". The pump includes a base on which a pump body is provided. The rotor extending in the front and rear direction has two tangent points between the section of the ...

AI Technical Summary

Problems solved by technology

The existing problem of this kind of pump is: the rotor is driven by the motor to rotate, corresponding to the motor, the start-up load is large, not only the power consumption but also the loss of the motor is large, and in the prior art, when the motor is started, the low pressure cavity The motor is already filled with hydraulic oil, and the start of the motor can only be completed by working on the hydraulic oil, which increases the starting load of the motor, which not only leads to an increase in the minimum power when the motor is selected, but also affects the normal energy consumption of the motor

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