Spiral and axial circulating cooling water channel structure for motor

Abstract

Disclosed is a spiral and axial circulating cooling water channel structure for a motor. The cooling water channel structure comprises a stator iron core of the motor, a cooling water channel is arranged in the iron core, the cooling water channel comprises a first spiral channel and a second spiral channel which are adjacent and extend parallelly, the inlet end of the first spiral channel is adjacent to the outlet end of the second spiral channel, and the outlet end of the first spiral channel is adjacent to and communicated with the inlet end of the second spiral channel. The first spiral channel and the second spiral channel are arranged parallelly along the axial direction of the iron core. Cooling water flows from the front end of the stator iron core to the back end of the stator iron core, then flows back to the front end, can evenly cool the iron core, and reduce the temperature difference between the front end and the back end of the stator iron core. The cooling water generates turbulence during backflow, which reduces the thermal resistance, and increases the heat exchange coefficient and the ratio of heat exchange, so that temperature increasing of the motor can be reduced, the power density can be improved; and the sealing can be achieved by using one rubber gasket, and the reliability and the process are remarkably improved.

Description

Technical field: [0001] The invention relates to the field of electricity, in particular to high-efficiency motors such as excitation motors and permanent magnet motors, in particular to a spiral axial circulation motor cooling water channel structure. Background technique: [0002] High-efficiency motors such as field motors and permanent magnet motors use cooling water to cool the motor. In the prior art, the cooling water channel in the high-efficiency motor adopts a spiral axial non-circulating water channel. In the spiral axial non-circulating water channel, the cooling water inlet and outlet are located at both ends, and the axial temperature curve of the cooling water increases linearly from the inlet to the outlet, so the heat transfer effect is uneven, resulting in a temperature difference between the front and rear ends of the motor stator core. Large, when the axial direction of the stator core of the motor is too long, the temperature of the motor at the last co...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a spiral axial circulating motor cooling water channel structure, the spiral axial circulating motor cooling water channel structure should solve the problem of the spiral axial non-circulating cooling water channel replacement of high-efficiency motors in the prior art Non-uniform heat, risk of motor failure, failure to improve heat transfer coefficient and heat transfer rate, and difficult sealing technical problems

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