Stator cooling structure and motor provided with stator cooling structure

Abstract

The invention provides a stator cooling structure and a motor provided with the stator cooling structure. A stator is coated with a shell, and the inner surface of the shell and the outer surface of the stator are arranged in a gapless manner; a plurality of axial slots are formed in the inner surface of the shell or the outer surface of the stator, and a first oil way blocking structure is arranged between every two adjacent axial slots; the two ends of the stator are provided with the two oil rings respectively, a plurality of radial oil injection channels are formed in the oil rings in the circumferential direction, and the oil injection channels face the windings at the two ends of the stator; at least one second oil way blocking structure is axially arranged on the second heat dissipation part and abuts against a first oil way blocking structure; and cooling oil axially circulates in the axial slots so as to make contact with the first heat dissipation part of the stator, flow to the connecting part, circulate in the circumferential direction and enter the gap through the multiple oil spraying channels so as to make contact with the second heat dissipation part, and efficient heat exchange between the stator iron core and the winding is achieved.

Description

technical field [0001] The invention relates to the technical field of motor manufacturing, in particular to a stator cooling structure and a motor provided with the stator cooling structure. Background technique [0002] At present, during the actual operation of the motor, when the motor is at low speed and high torque, the stator and rotor of the motor will emit a lot of heat. Circulating flow, and then realize the cooling effect of the motor. In this cooling method, the motor stator winding (coil) and the rotor cannot be directly cooled, and the main heat source of the motor cannot be effectively cooled. Therefore, the thermal load of the motor is limited, which leads to The size of the motor is limited. [0003] In the prior art, in order to improve the cooling efficiency of the motor, an oil-cooled cooling method has appeared. Since the cooling oil is not conductive, it can directly contact the heat sources of the motor, and the heat sources of the motor can be effect...

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Problems solved by technology

[0002]At present, during the actual operation of the motor, when the motor is at low speed and high torque, the stator and rotor of the motor will emit a lot of heat, and the heat dissipation method of the motor is mostly in the motor A spiral water flow channel is set inside the casing, and the cooling effect of the motor is achieved through the circulation of water in the casing. This cooling method has the disadvantage that the motor stator winding (coil) and the rotor cannot be directly cooled, and the main heat source of the motor is Less effective cooling, so the thermal load on the motor is limited, which in turn leads to a limited motor volume

[0003] In order to improve the cooling efficiency of the motor in the prior art, an oil-cooled cooling method has appeared. Since the cooling oil is not conductive, it can be directly connected to the motor. The heating source is in contact, and the heating sources of the motor are effectively cooled. Under the same performance requirements, the oil-cooled motor has higher heat load than the traditional water-cooled motor, the motor volume can be reduced, and the power density can be further improved. The cooling oil can be lubricated and cooled at the same time. Motor bearings, and thus the life of the motor is also improved, but the structure of the oil circuit is complex and the processing technology is cumbersome. The structure of the oil circuit mostly uses screw fastening, welding and other processing techniques, and the structure of each component is complex and the processing cost is high.

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