Oil-cooled flat wire motor with oil-driven spraying structure

Abstract

The invention discloses an oil-cooled flat wire motor with an oil-driven spraying structure, which comprises a casing, a stator assembly arranged in the casing, and a front end cover and a rear end cover which are arranged at two ends of the casing, and is characterized in that two groups of circumferential flow channels are arranged on the inner circular surface of the casing and respectively flow to the front end cover and the rear end cover; an oil inlet nozzle is installed on the machine shell and communicated with the circumferential flow channel. The front end cover and the rear end cover are respectively provided with a front end oil cavity and a rear end oil cavity, and the tops and the bottoms of the front end cover and the rear end cover are respectively provided with an oil inlet nozzle and an oil outlet nozzle which are communicated with the front end oil cavity and the rear end oil cavity; the outer wall of the bearing chamber of the front end cover and the outer wall of the bearing chamber of the rear end cover are each provided with a rotary injection mechanism, and rotary injection oil cavities are formed between the rotary injection mechanisms and the front end cover and between the rotary injection mechanisms and the rear end cover and communicated with the front end oil cavity and the rear end oil cavity. According to the motor, the rotary spraying mechanisms are installed on the front end cover and the rear end cover of the motor, the spraying assembly is driven to rotate through the counter-acting force of cooling oil sprayed out of the oil spraying nozzles, and uniform spraying cooling of the winding at the end of the flat wire motor is achieved.

Description

technical field [0001] The invention relates to the technical field of electric motors, and more specifically relates to an oil-cooled flat-wire electric motor with an oil-driven spray structure. Background technique [0002] In the "New Energy Vehicle Industry Development Plan 2021-2035", by 2025, the power density of passenger car motors should reach >4kW / kg, and the torque density of commercial vehicle motors should reach >19N m / kg. To develop in the direction of high power density and high torque density, these are closely related to the heat dissipation method of the motor. Efficient heat dissipation can improve the continuous power, continuous torque, and peak torque duration of the motor. [0003] At present, most of the oil-cooled motors represented by Model 3, the cooling of the winding end is through two oil collecting rings, which are respectively sealed with the inner circular surface of the casing, the end surface of the stator core and the inner circular ...

AI Technical Summary

Problems solved by technology

However, most of the oil collector rings are made of PPS+GF. During the installation process of the oil collector ring, it needs to be heated or in the oil bath environment, and the oil collector ring will produce irregular deformation, resulting in the contact surface with the iron core or the end cover, The contact surface of the casing leaks oil, the pressure of the final oil injection hole is insufficient, and the cooling oil cannot be sprayed to the end of the winding

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