Oil cooling electric driving force rotor structure

Abstract

The invention discloses an oil cooling electric driving force rotor structure, and the structure comprises a motor shaft and a rotor iron core assembly installed on the motor shaft; the motor shaft comprises a main shaft body and an inner insertion pipe, the main shaft body is provided with a cavity and a main oil hole communicated with the cavity, the inner insertion pipe is inserted in the cavity, the side surface of the inner insertion pipe is provided with a main oil outlet, and the main oil outlet is communicated with the main oil hole; an inner cavity of the inner penetrating pipe is communicated with a cavity of the main shaft body through the main oil outlet, one end of the inner inserting pipe is sealed, the other end of the inner inserting pipe is open, the rotor iron core assembly is provided with an oil channel, one end of the oil channel is communicated with the main oil hole of the main shaft body, the other end of the oil channel is communicated to an air gap in the periphery of the rotor iron core assembly, and the hole diameter of the main oil hole is larger than that of the main oil outlet. According to the scheme, the cooling and heat dissipation effects of the motor are greatly improved, and the power density is instantly improved; meanwhile, the oil liquid passes through the structure of the inner insertion pipe to avoid volume oil of the main shaft, the stator is further cooled after the rotor is cooled by the oil liquid, the oil consumption of the electric drive assembly is reduced, and the high-temperature demagnetization risk is avoided.

Description

technical field [0001] The invention relates to the field of electric motors, in particular to an oil-cooled electric drive rotor structure. Background technique [0002] As the core technology of new energy vehicles, the electric powertrain is becoming increasingly integrated and developing in the direction of high power density. (1) Due to the limitation of mechanical strength and loss, it is difficult to increase the power limit in the prior art; (2) Because the stator and rotor are immersed in the oil, the oil consumption of the prior art is large; (3) There is a high temperature of the rotor Risk of demagnetization, for example, an "oil-cooled motor that can isolate the space where the motor stator and rotor are located" disclosed in the Chinese patent literature, its announcement number CN109194037A, is set in the air gap 6 between the motor stator 1 and the rotor 3 The isolation sleeve assembly 5, the isolation sleeve 501 is a cylindrical structure with a rib 504 on ...

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Problems solved by technology

In this solution, the fuel consumption is high, there is a risk of high temperature demagnetization, and the power density is limited

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