Cooling structure for high-speed permanent magnet synchronous motor on low-temperature electric pump

The utility model provides a cooling structure for a high-speed permanent magnet synchronous motor on a low-temperature electric pump. The cooling structure comprises a turbo-type centrifugal fan arranged between a low-temperature centrifugal pump body and the high-speed permanent magnet synchronous motor. The turbo-type centrifugal fan is installed on a rotating shaft of the high-speed permanent magnet synchronous motor in a key groove matching mode. One side of the turbo-type centrifugal fan is an air inlet end, and the other side of the turbo-type centrifugal fan is an exhaust end; and a plurality of axial-flow type blades which are circumferentially distributed are arranged at the maximum excircle of the end surface of the air inlet end. According to the utility model, the conduction capability of leaked gas at the dynamic sealing assembly on the low-temperature centrifugal pump body is enhanced, the high-efficiency heat dissipation and cooling of the high-speed permanent magnet synchronous motor body are