Bidirectional cooling oil-cooling motor

Abstract

The invention belongs to the field of motors, and discloses a bidirectional cooling oil-cooling motor which comprises a motor casing and a stator assembly. The stator assembly comprises a stator iron core and a stator winding. A cooling oil inlet is arranged in the motor casing. An annular oil groove runs through the yoke of the stator iron core. An axial cooling oil pipe is arranged between two adjacent coil groups. Each axial cooling oil pipe is provided with a cooling oil inlet and a cooling oil outlet. End caps are arranged on two ends of the motor casing. An oil discharge cavity is arranged in each end cap. Each end cap is provided with a cooling oil outlet. Heat-conducting glue is arranged on both ends of the stator iron core and a position corresponding to the annular oil groove. According to the invention, the axial cooling oil pipes are arranged in the motor groove; cooling oil comes into the motor from the middle of the motor casing and flows to the end parts of the stator winding; the end parts of the stator winding and the inner part of the groove can be cooled at the same time; and the whole stator winding is cooled.

Description

technical field [0001] The invention belongs to the field of motors, and more specifically relates to a two-way cooling oil-cooled motor. Background technique [0002] High power density motors are widely used in electric vehicles, aviation motors and other occasions that have strict requirements on the volume and weight of the motor. Due to the high electromagnetic load of this type of motor, the loss per unit volume is very large, but the heat dissipation area is relatively reduced, so it is difficult to dissipate heat. Water cooling or oil cooling is often used to cool the motor to prevent the motor winding and magnetic The temperature rise of important components such as steel is too high, which reduces the life of the motor and affects the safety and economy of motor operation. [0003] Compared with the water cooling method, the cooling oil in the oil cooling method can directly contact the surface of the heating part of the motor. By spraying or pouring, the cooling ...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a two-way cooling oil-cooled motor, the cooling oil enters the axial oil passage from the annular oil groove in the middle of the motor stator, and flows out from the outlet provided on the outer surface of the motor end winding , so it can effectively cool the motor slot and end windings, which solves the problem of difficult cooling and high temperature rise of the motor slot windings and end windings

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