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CN-120189784-B - Oil-gas separation device of oil-cooled motor

CN120189784BCN 120189784 BCN120189784 BCN 120189784BCN-120189784-B

Abstract

The invention relates to an oil-gas separation device of an oil-cooled motor, which comprises an end cover provided with a central hole, wherein the outer wall of the central hole is provided with an oil filling hole and an air-permeable valve mounting hole, an oil retainer is arranged in the end cover, an oil-gas separator is arranged between the outer wall of the central hole and the oil retainer, and the oil-gas separator comprises an upper cover plate, a lower cover plate and a filter element sheet arranged between the upper cover plate and the lower cover plate. According to the invention, the oil-gas separator is arranged, so that the effect of fully separating the gaseous mixture of the cooling liquid and the air generated by the high temperature of the motor operation is achieved, and the oil-gas separator is convenient to replace, so that the service life of the motor is prolonged, and the problem that the ventilation property of the ventilation valve is damaged by the cooling liquid in the prior art is solved.

Inventors

  • YANG LIGUANG

Assignees

  • 无锡豫玛动力科技有限公司

Dates

Publication Date
20260508
Application Date
20240801

Claims (10)

  1. 1. An oil-gas separation device of an oil-cooled motor comprises an end cover (2) provided with a central hole (1), wherein an outer wall (11) of the central hole is provided with an air-permeable valve mounting hole (6) and an oil filling hole (7); The oil-gas separator is characterized in that an oil retainer (4) is arranged in the end cover (2), and an oil-gas separator (3) is arranged between the outer wall (11) of the central hole and the oil retainer (4), wherein the oil-gas separator (3) comprises an upper cover plate (31), a lower cover plate (32) and a filter element sheet (33) arranged between the upper cover plate (31) and the lower cover plate (32); In the running process of the motor, the oil-gas separator (3) rotates along with the end cover (2), most of cooling oil brought up by the rotation of the motor in the running process is blocked by the oil retainer (4), only a small amount of cooling oil and high-temperature oil-gas mixture generated in the running process of the motor enter the oil retainer (4), then enter the oil-gas separator (3), and oil drops condensed in the cooling oil and the high-temperature oil-gas mixture are adhered to the filter element sheet (33) and thrown out by centrifugal force.
  2. 2. The oil-gas separation device of the oil-cooled motor according to claim 1, wherein the upper cover plate (31) of the oil-gas separator (3) is a circular plate provided with a central through hole (311), the central through hole (311) is communicated with the central hole (1), the lower cover plate (32) is in a circular ring shape, the radius of an inner ring of the lower cover plate is larger than that of the central hole (1), the filter element sheets (33) are in a circular ring shape, the radius of an outer ring of the filter element sheets is smaller than that of an outer ring of the lower cover plate (32), the radius of an inner ring of the filter element sheets (33) is larger than that of an inner ring of the lower cover plate (32), and the filter element sheets (33) are sequentially arranged at intervals between the upper cover plate (31) and the lower cover plate (32).
  3. 3. The oil-gas separator of an oil-cooled motor according to claim 2, wherein the filter element sheet (33) has a wavy annular structure.
  4. 4. The oil-gas separation device of the oil-cooled motor according to claim 2, wherein a filter screen outer bracket (34) is arranged between the upper cover plate (31) and the lower cover plate (32) and at the outer ring edge of the filter core piece (33), and a filter screen inner bracket (35) is arranged between the upper cover plate (31) and the lower cover plate (32) and at the inner ring edge of the filter core piece (33).
  5. 5. The oil-gas separation device of an oil-cooled motor according to claim 1, wherein the angle between the inner wall (41) of the slinger and the bottom of the end cap (2) is greater than 90 degrees.
  6. 6. The oil-gas separation device of the oil-cooled motor according to claim 2, wherein a filter device (5) is arranged between the outer wall (11) of the central hole and the inner ring of the lower cover plate (32) of the oil-gas separator (3).
  7. 7. The oil-gas separation device of the oil-cooled motor according to claim 2, wherein the outer wall (11) of the central hole is provided with a bulge formed by the air-permeable valve mounting hole (6) and the oil filling hole (7), the filtering device (5) is annular, and the annular inner wall is provided with a groove corresponding to the bulge.
  8. 8. An oil-gas separator for an oil-cooled electric machine according to claim 7, characterized in that the filter means (5) is a filter screen made of stainless steel mesh sheet or glass fiber or polyurethane.
  9. 9. The oil-gas separation device of the oil-cooled motor according to claim 2, wherein the outer wall (11) of the central hole is provided with a mounting hole (12), the upper cover plate (31) is correspondingly provided with a fixing hole (312), and the oil-gas separator (3) is fixed in the end cover (2) through the fixing hole (312) and the mounting hole (12).
  10. 10. The oil-gas separation device of the oil-cooled motor according to claim 1, wherein the oil retainer (4) is higher than the oil-gas separator (3).

Description

Oil-gas separation device of oil-cooled motor Technical Field The invention relates to the technical field of hub motors, in particular to an oil-gas separation device of an oil-cooled motor. Background In the motor of the oil cooling mode, due to the effect of a rotor rotating at high temperature and high speed, partial cooling liquid in the motor shell is atomized to form a gaseous liquid-gas mixture, so that the pressure in the motor shell is too high, great challenges are caused to motor sealing, and the condition of oil seepage outwards occurs to the motor with poor sealing performance, so that the pressure in the oil cooling motor shell must be relieved. The common method in the prior art is to install a ventilation valve on a motor shell, and utilize a ventilation film on the ventilation valve to exchange gas inside and outside the motor, but the high temperature of the motor operation atomizes the cooling liquid, the formed gaseous liquid-gas mixture can also diffuse to the ventilation valve, and when the atomized cooling liquid in the liquid-gas mixture is cooled into liquid drops, the atomized cooling liquid can be attached to the ventilation film, and finally the ventilation film loses the gas permeation function. Therefore, how to prevent the liquid-gas mixture from diffusing to the air-permeable valve is a problem to be solved by the current liquid-cooled motor. The invention application CN117639352A discloses a liquid cooling motor liquid blocking labyrinth structure, which comprises a mounting plate, wherein a central hole is formed in the mounting plate, the liquid cooling motor liquid blocking labyrinth structure further comprises a labyrinth liquid blocking piece which is arranged on the mounting plate, the labyrinth liquid blocking piece is of an annular structure and is distributed around the central hole, a ventilation channel is arranged in the labyrinth liquid blocking piece, a first ventilation opening and a second ventilation opening which are communicated with the ventilation channel are formed in the labyrinth liquid blocking piece, a main liquid blocking plate is arranged at each ventilation opening, and the liquid cooling motor liquid blocking labyrinth structure further comprises a ventilation valve mounting hole for mounting a ventilation valve, and gas entering the ventilation channel from the ventilation opening can be discharged through the ventilation valve arranged on the ventilation valve mounting hole. The main liquid baffle plate strives to block the cooling liquid outside the ventilation opening, but still the cooling liquid can enter the ventilation channel through the ventilation opening, and the labyrinth liquid baffle member is of an annular structure and distributed around the central hole, so that part of the cooling liquid can be thrown out of the ventilation opening by virtue of centrifugal force generated by rotation of the rotor, the possibility of contact between the cooling liquid and the ventilation valve is reduced to the greatest extent, the ventilation valve can stably work for a long time, and the balance of the internal and external air pressures of the motor is ensured at any time. According to the technical scheme, the contact between the cooling liquid and the ventilation valve can be avoided in theory, but the main factor affecting the air exchange of the liquid cooling motor is the liquid-gas mixture generated by the high temperature of the motor, the labyrinth structure has only one circle of ventilation channels, the running path of the liquid-gas mixture is too short, the liquid cooling liquid can be centrifugally thrown out, a certain amount of liquid-gas mixture which is not condensed into a gaseous state still reaches the ventilation valve, after the liquid-gas mixture is condensed, the cooling liquid still can be adhered to the ventilation film to damage the permeability of the ventilation film, so that the balance of the internal and external air pressure of the motor is affected, the whole labyrinth liquid blocking piece has a complex structure, and the die manufacturing cost is high. Disclosure of Invention The invention aims to provide an oil-gas separation device of an oil-cooled motor, which achieves the effect of fully separating a gaseous cooling oil and air mixture generated by high temperature of motor operation by arranging an oil-gas separator, and solves the problem that the cooling oil in the prior art damages the ventilation property of a ventilation valve. In order to achieve the above purpose, the technical scheme of the invention is as follows: The oil-gas separation device of the oil-cooled motor comprises an end cover provided with a central hole, wherein the outer wall of the central hole is provided with an oil filling hole and an air-permeable valve mounting hole; The oil-gas separator comprises an upper cover plate, a lower cover plate and a filter element sheet arranged between the upper cover plate and the lower