Oil cooling structure of driving motor and processing method thereof

Abstract

According to the oil cooling structure of the driving motor and the processing method of the oil cooling structure, the oil guide hole in the rotor shaft and the second oil channel in the balance disc form a cooling path for cooling oil to flow from the rotor shaft to the rotor core, so that the rotor shaft can be cooled, and the rotor core can also be cooled; the tolerance influence is reduced, and the adaptability of the shaft is improved; according to different inner and outer spline arrangements of a rotor shaft and a speed reducer shaft, the space of the overlapped part of the shaft and the splines is fully utilized, and the overall axial size is controlled; compared with a welding shaft capable of carrying out clearance design on splines, the rigid shaft cannot carry out clearance design on the splines, so that the speed reducer shaft and the rotor shaft are provided with the grooves in the same positions and are synchronously provided with the holes, and communication of the first oil channel and the first annular groove is achieved; according to the method, the assembly process and requirements of special light-weight shafts such as rigid shafts and welding shafts are fully considered.

Description

technical field [0001] The invention relates to the technical field of driving motors, in particular to an oil cooling structure of a driving motor and a processing method thereof. Background technique [0002] The motor refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. It is mainly determined by the left-hand rule through the direction of the force on the conductor. This pair of electromagnetic forces forms a torque acting on the armature. This torque is called electromagnetic torque in the rotating electrical machine. The direction of the torque is counterclockwise, trying to make the armature rotate counterclockwise. If this electromagnetic torque can overcome the resistance torque on the armature (such as the resistance torque caused by friction and other load torques), the armature can rotate counterclockwise. [0003] At present, during the actual operation of the moto...

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Problems solved by technology

[0003] 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

[0004] 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 effectively cooled. Under the requirement, compared with the traditional water-cooled motor, the heat load of the oil-cooled motor is increased, the volume of the motor can be reduced, and the power density can be further improved. The cooling oil can lubricate and cool the motor bearing at the same time, and the life of the motor is also improved, but the structure of the oil circuit is complicated. , The processing technology is cumbersome, the oil circuit structure mostly adopts screw fastening, welding and other processing technology, the structure of each component is complicated, and the processing cost is high.

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