Electric motor and centrifugal compressor therewith

Abstract

The invention discloses a motor and a centrifugal compressor with the motor. The motor comprises a machine shell, a stator, a rotor and wiring terminals, wherein the machine shell comprises an outer shell and an inner shell, a liquid inlet is formed in the inner shell, and an inlet and an air outlet are formed in the outer shell; a coil is wound on the stator, the rotor is rotatably arranged inside the stator, an annular circulation space is restricted between the inner periphery of the stator and the inner periphery of the inner shell, a first liquid spray hole is formed in the stator, the first liquid spray hole communicates with the circulation space and extends onto the inner periphery of the stator, and second liquid spray holes communicating with the circulation space are formed in the inner shell. According to the motor disclosed by the invention, through the arrangement of a double-layer shell structure, cooling liquid can enter into the inner shell of the motor through a liquid inlet passage for circulation, so that the cooling liquid can be prevented from splashing onto the inner periphery of the outer shell, the condensation phenomenon can be prevented from appearing onthe outer shell of the motor, and the using safety of the motor can be improved. The motor is simple and reasonable in structure design and extremely high in practicability.

Description

technical field [0001] The invention relates to the field of motors, in particular to a motor and a centrifugal compressor with the same. Background technique [0002] The motor of the compressor generates a lot of heat through rotation during operation. Usually, it is cooled by refrigerant cooling, and the heat generated by the motor is taken away by the phase change of the refrigerant when heated, so as to achieve the purpose of cooling the motor. [0003] In the related art, a plurality of coolant supply points are arranged on the casing of the motor, and the stator and the rotor of the motor are installed in a cavity defined by the casing of the motor. Refrigerant is supplied to the stator and rotor of the motor through multiple lines, and it is cooled by the refrigerant. However, there are too many liquid supply points outside the motor, which leads to complicated external pipelines and inconvenient assembly. During the operation of the motor, the coolant will splash...

AI Technical Summary

Problems solved by technology

However, there are too many liquid supply points outside the motor, which makes the external pipeline more complicated and inconvenient to assemble

During the operation of the motor, the coolant will splash to the lower part of the terminal, and there is a risk of condensation at the terminal, which will affect the normal operation of the motor

Images