Oil cooling driving motor and assembling method thereof

Abstract

The invention provides an oil cooling driving motor which comprises a shell and a motor body arranged in the shell, an inner oil sleeve is arranged outside the motor body in a sleeving mode, the inner oil sleeve comprises oil rings arranged at the two ends of the motor body and a cooling part arranged between the two oil rings, the cooling part is provided with a hollowed-out cooling oil way, and the cooling oil way is provided with an oil inlet and an oil outlet. The cooling oil path is axially distributed or circumferentially distributed along the outer surface of the motor body; the oil ring and the cooling part are integrated; the inner oil sleeve and the motor body are in interference fit through a shrinkage fit process; an oil spraying area is arranged on the oil ring, cooling oil flows on the cooling oil way in the axial direction or the circumferential direction of the outer surface of the motor body so as to be used for cooling the motor body, and the cooling oil enters the oil spraying area through the connecting oil way and is sprayed to the two ends of the motor body through the oil spraying holes.

Description

technical field [0001] The invention relates to the technical field of drive motors, in particular to an oil-cooled drive motor and an assembling method thereof. 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, thereby realizing the cooling effect of the motor. In this cooling method, the stator winding (coil) and rotor of the motor cannot be directly cooled, and the main heat source of the motor cannot be effectively cooled, so the thermal load of the motor is limited, which leads to The size of the motor is limited. And some water-cooled motors are designed with inner and outer water jackets, but because the cooling water conducts electricity, it cannot contact and spray with the stator and rotor, so the inner water jacket is a closed design. [0003] In the prior art, in order to improve the cooling efficiency of...

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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

And some water-cooled motors are designed with inner and outer water jackets, but because the cooling water is conductive, it cannot contact and spray with the stator and rotor, so the inner water jacket is a closed design

[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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