Moving contact structure of high-voltage direct current sealing contactor

Abstract

The structure of the moving contact of the high-voltage DC sealed contactor mainly includes the first moving contact piece, the moving contact, the first upper bushing, the electromagnetic drive system, the second upper bushing, the first contact spring and the support washer, each of which passes through The riveting and fasteners and the corresponding fixing holes are connected in sequence; the contact structure adopts a two-way double breakpoint structure, and also includes a second moving contact piece located under the first moving contact piece, and a second moving contact piece set under the second moving contact piece. The supporting adjustment washer on the piece and a second contact spring 1 arranged outside the first contact spring; the first moving contact piece and the second moving contact piece are in double “J” shape. The invention adopts the "J"-shaped structure design of the double-moving contact piece to accelerate the movement and extinguishment of the arc when the contact is disconnected, and reduces the loss of the contact; the use of the moving contact piece and the contact spring structure effectively reduces the ignition between the main contacts. The effective adjustment of arc time, contact wear and contact pressure enables the four breakpoints to be effectively contacted and disconnected, thereby improving product performance and life.

Description

technical field [0001] The invention relates to a moving contact structure of a high-voltage DC sealed contactor, which is used for circuit switching of an aircraft power supply system and is suitable for controlling loads of (1000A-3000A)×(270-1000) VDC. technical background [0002] The existing high-voltage DC sealed contactor moving contacts such as figure 1 As shown, it mainly includes the moving contact piece, the upper bushing, the lower bushing and the contact spring. When disconnecting the high voltage and large current, its defects are: (1) Since the moving contact piece is in the shape of "one" and the number is one, The arcing time between the main contacts is longer, and the wear of the contacts is greater; (2) Since the number of contact springs is one, the service life is short and it is difficult to disconnect. Contents of the invention [0003] The invention aims to solve the technical problems of on-off high-voltage and high-current: the arcing time betw...

AI Technical Summary

Problems solved by technology

[0002] The existing high-voltage DC sealed contactor moving contacts such as figure 1 As shown, it mainly includes the moving contact piece, the upper bushing, the lower bushing and the contact spring. When disconnecting the high voltage and large current, its defects are: (1) Since the moving contact piece is in the shape of "one" and the number is one, The arcing time between the main contacts is longer, and the wear of the contacts is greater; (2) Since the number of contact springs is one, the service life is short and it is difficult to disconnect

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