Oil circuit structure of oil-cooled motor

Abstract

An object of the present invention is to disclose an oil circuit structure of an oil-cooled motor. At least one groove is disposed in the circumferential direction of an outer circle of the stator core, and at least one groove is disposed in the axial direction of the outer circle of the stator core. Each groove has a certain depth. An oil passage is arranged between the inner wall of a motor casing and the stator core. The groove in the axial direction of the outer circle of the stator core introduces cooling oil through the oil passage. Compared with the prior art, the outer circle of the stator core has grooves in the circumferential direction and the axial direction, and is in interference, transition or clearance fit with the inner wall of the motor casing. The oil passage is arrangedbetween the inner wall of the motor casing and the outer circle of the stator core and can be filled with the cooling oil through an oil pipe, a through hole in the motor casing or other things. On the premise of ensuring the assembly reliability of the motor, the cooling oil is in contact with heat-generating components to dissipate heat, thereby achieving the object of the present invention.

Description

technical field [0001] The invention relates to an oil circuit structure of a motor, in particular to an oil circuit structure of an oil-cooled motor. Background technique [0002] Among the motor cooling methods, there is a way to use cooling oil to directly contact the loss-generating parts of the stator and rotor of the motor to dissipate heat. Currently, the main cooling structure used in this type of cooling method is to spray the cooling oil through conduits or fine holes to generate heat. The surface of the consumable part. [0003] However, this structure will impose requirements on the mechanical structure of the iron core. If the stator iron core is to be cooled, mounting ears need to be processed on the outer circle of the stator of the motor, and the stator iron core and the casing cannot be assembled by interference. . [0004] At the same time, for spray-cooled motors, the injection and flow direction of cooling oil will be affected by gravity. When the angle...

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Problems solved by technology

[0003] However, this structure will impose requirements on the mechanical structure of the iron core. If the stator iron core is to be cooled, mounting ears need to be processed on the outer circle of the stator of the motor, and the stator iron core and the casing cannot be assembled by interference.

[0004] At the same time, for spray-cooled motors, the injection and flow direction of cooling oil will be affected by gravity. When the angle between the motor installation plane and the direction of gravity changes, there will be a larger position that cannot be covered by cooling oil.

The stator core with mounting lug structure will consume more silicon steel sheets when the outer diameter is the same, and the cost is higher. At the same time, when the iron core is longer, the reliability of this assembly method is low

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