Pressure finger anti-escape structure of large-scale high-voltage synchronous motor and construction method of pressure finger anti-escape structure

Abstract

The invention belongs to the field of motors, particularly discloses a pressure finger anti-escape structure of a large high-voltage synchronous motor and a construction method of the pressure fingeranti-escape structure, and aims to effectively fix a pressure finger and prevent the pressure finger from escaping after desoldering. According to the pressure finger anti-jumping-out structure of thelarge-scale high-voltage synchronous motor, a flexible embedding part is arranged in a gap between a winding unit and a pressure finger, and the embedding part is filled with an insulating plate, sothat the embedding part is in a compressed state, the influence of motor vibration on the pressure finger can be reduced, and the pressure finger is further clamped and fixed; desoldering accidents ofthe pressing fingers are avoided as much as possible; a flexible pad is arranged on the inner wall surface of an end winding part between a tooth pressing plate and a stator iron core for a circle, and a pouring sealing layer is arranged on the inner wall surface of the flexible pad, so that a pressing finger can be hooped, a support fixing ring is formed, the pressing finger can be effectively prevented from jumping out from a gap between winding units after desoldering, and the operation safety of the large high-voltage synchronous motor is ensured.

Description

technical field [0001] The invention belongs to the field of electric motors, and in particular relates to a pressure finger escape-proof structure of a large-scale high-voltage synchronous motor and a construction method thereof. Background technique [0002] Large high-voltage synchronous motors refer to synchronous motors with rated power above 100KW and rated voltage above 1000V, for example: 300KW / 6KV synchronous motors. Large-scale high-voltage synchronous motors have the characteristics of improving power grid quality, large starting torque, and high speed control accuracy, and are widely used in the main rolling line drive motors of large-scale steel rolling mills; the existing large-scale high-voltage synchronous motors are composed of two parts: stator and rotor. There are three-phase AC windings on the stator; there are excitation windings on the rotor, and the stator is composed of stator core, armature three-phase winding, machine base and end cover. The stator...

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Problems solved by technology

The stator iron core is made of fan-shaped silicon steel sheets and then stacked. There are tooth pressure plates at both ends of the iron core. The tooth pressure plates are welded with pressure fingers that compress the ends of the iron core. Normally, the pressure fingers are firmly welded to the tooth pressure plates. On the above, the gap between the stator and the rotor is about 10mm. During long-term operation, the vibration and electromagnetic force of the motor will gradually destroy the solder joints and cause desoldering. When there is a gap, it will inevitably cause the rotating rotor to collide with the pressure finger, thus damaging the stator and rotor

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