Spiral liquid-gas separation structure

Abstract

The utility model relates to a spiral liquid-gas separation structure which comprises an end cover provided with a central hole, a spiral liquid-gas separation channel arranged around the central hole, and an air exchange port arranged on the liquid-gas separation channel. The liquid-gas separation channel comprises a liquid-gas separation ring groove and a liquid blocking cover plate which are arranged around the center hole, the liquid-gas separation ring groove is a variable-diameter spiral ring groove from inside to outside with the center hole as the center, and the liquid blocking cover plate covers the liquid-gas separation ring groove to form the liquid-gas separation channel. By arranging the spiral reducing liquid-gas separation ring groove, the effect of fully separating gaseous cooling liquid and air mixture generated at high temperature during operation of the motor is achieved, and the problem that in the prior art, the cooling liquid damages the air permeability of the ventilation valve is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hub motors, in particular to a spiral liquid-gas separation structure. Background Art

[0002] The motor generates heat during operation. In order to quickly dissipate heat from the motor movement and maintain high-efficiency operation within the appropriate temperature range, insulating liquid is injected into the motor to achieve the purpose of quickly dissipating heat from the motor. In an oil-cooled motor, due to the high temperature and high-speed rotation of the rotor, some of the coolant inside the motor housing will be atomized to form a gaseous liquid-gas mixture, which will cause the pressure inside the motor housing to be too high. This will pose a great challenge to the motor seal. Motors with poor sealing will leak oil at this time, so the pressure inside the oil-cooled motor housing must be relieved.

[0003] A common method in existing technology involves installing a breather valve on the motor housing and utilizing a permeable membrane within the valve to exchange air between the motor and the outside. However, the high operating temperature of the motor causes the coolant to atomize, and the resulting gaseous liquid-gas mixture can also diffuse into the breather valve. When the atomized coolant in the liquid-gas mixture cools and forms droplets, it adheres to the permeable membrane, ultimately rendering the membrane incapable of permeating air. Therefore, preventing the liquid-gas mixture from diffusing into the breather valve is a challenge facing current liquid-cooled motors.

[0004] Chinese invention application CN117639352A discloses a liquid-blocking maze structure for a liquid-cooled motor, comprising a mounting plate, a central hole being provided on the mounting plate, and a labyrinth liquid-blocking part mounted on the mounting plate, wherein the labyrinth liquid-blocking part is annular in structure and distributed around the central hole, an air vent being provided in the labyrinth liquid-blocking part, a first air port and a second air port being provided on the labyrinth liquid-blocking part communicating with the air vent, and a main liquid-blocking plate being provided at each air port; and a breather valve mounting hole for mounting a breather valve being provided on the labyrinth liquid-blocking part and / or the mounting plate, wherein gas entering the breather channel from the air port can be discharged through the breather valve mounted on the breather valve mounting hole.

[0005] In the above-mentioned maze structure, the main liquid baffle plate strives to block the coolant outside the air vent; but some coolant will still enter the air vent channel through the air vent. Since the maze liquid baffle is a ring structure and is distributed around the central hole, the centrifugal force generated by the rotation of the rotor will throw this part of the coolant out of the air vent, thereby minimizing the possibility of contact between the coolant and the air valve. The air valve can maintain stable operation for a long time and ensure the balance of air pressure inside and outside the motor at all times.

[0006] The above technical solution can theoretically avoid the contact between the coolant and the breathable valve. However, the main factor affecting the air exchange of the liquid-cooled motor is the liquid-gas mixture generated by the high temperature of the motor. Since the above-mentioned maze structure has only one circle of breathable channels, the path for the liquid-gas mixture to run is too short. The liquid coolant may be centrifuged and thrown out, but there will still be a certain amount of uncondensed gaseous liquid-gas mixture reaching the breathable valve. When the liquid-gas mixture condenses, the coolant therein will still adhere to the breathable membrane, damaging the permeability of the breathable membrane, thereby affecting the balance of air pressure inside and outside the motor. In addition, the structure of the entire maze liquid-blocking part is complex and the mold manufacturing cost is high. Utility Model Content

[0007] The purpose of the utility model is to provide a spiral liquid-gas separation structure. By setting a spiral variable diameter liquid-gas separation ring groove, the effect of fully separating the gaseous coolant and air mixture generated by the high temperature of the motor operation is achieved, thereby solving the problem of the coolant damaging the permeability of the breather valve in the prior art.

[0008] In order to achieve the above purpose, the technical solution of the utility model is:

[0009] A spiral liquid-gas separation structure comprises an end cover provided with a central hole, a spiral liquid-gas separation channel arranged around the central hole, and an air exchange port provided in the liquid-gas separation channel.

[0010] The liquid-gas separation channel includes a liquid-gas separation annular groove and a liquid-blocking cover plate arranged around the central hole. The liquid-gas separation annular groove is a spiral annular groove with a variable diameter from the inside to the outside with the central hole as the center. The liquid-gas separation channel is formed by covering the liquid-gas separation annular groove.

[0011] The spiral rotation direction of the liquid-gas separation ring groove is opposite to the rotation direction of the motor.

[0012] With the central hole as the center, the width of the liquid-gas separation annular groove gradually widens from the inside to the outside.

[0013] The air exchange port is the opening at the starting point and end point of the liquid-gas separation annular groove. The opening of the liquid-gas separation annular groove starting from the center hole is the inner air exchange port, and the opening at the end point of the liquid-gas separation annular groove is the outer air exchange port.

[0014] The opening direction of the external air exchange port is opposite to the rotation direction of the motor.

[0015] The advantages of the present invention are: 1. The spiral rotation direction of the liquid-gas separation annular groove surrounding the central hole is opposite to the rotation direction of the motor, and the coolant entering the liquid-gas separation annular groove can be thrown out by centrifugal force; 2. The spirally variable diameter liquid-gas separation annular groove arranged around the central hole can extend the running path of the liquid-gas mixture of the atomized coolant generated by the high temperature of the motor and the air in a gaseous state, so that the atomized coolant in the liquid-gas mixture has sufficient condensation time, thereby achieving the effect of sufficient liquid-gas separation; 3. The width of the spirally variable diameter liquid-gas separation annular groove gradually widens from the inside to the outside, so that the coolant can be more easily thrown out of the liquid-gas separation annular groove under the action of centrifugal force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural explosion diagram of the utility model.

[0017] Figure 2 It is a structural sectional view of the present utility model.

[0018] Figure 3 It is a structural schematic diagram of the end cover of the utility model.

[0019] In the figure: 1-center hole; 2-end cover; 4-liquid-gas separation ring groove; 51-external air exchange port; 52-internal air exchange port; 6-liquid blocking cover; 7-end cover. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings, which are for illustrative purposes only and are not to be construed as limiting the present invention.

[0021] To more concisely illustrate this embodiment, some components well known to those skilled in the art but not relevant to the main content of this invention may be omitted from the drawings or descriptions. In addition, for ease of description, some components may be omitted, enlarged, or reduced in size in the drawings, but they do not represent the dimensions or entire structure of the actual product.

[0022] The utility model is a spiral liquid-gas separation structure, such as Figure 1-3 As shown, it includes an end cap 2 with a central hole 1. A spiral liquid-gas separation channel is arranged around the central hole 1, and the liquid-gas separation channel is provided with an air exchange port. When the liquid-cooled motor rotates at high speed, a large amount of gaseous atomized coolant is generated, forming a liquid-gas mixture. When the pressure in the motor cavity increases, the liquid-gas mixture will flow through the liquid-gas separation channel to the vicinity of the central hole 1, thereby affecting the function of the air valve.

[0023] like Figure 3 As shown, the liquid-gas separation channel includes a liquid-gas separation annular groove 4 and a liquid blocking cover plate 6 arranged around the central hole 1. The liquid-gas separation annular groove 4 is designed according to the principle of the Archimedean curve. It is a spiral annular groove with a variable diameter from the inside to the outside with the central hole 1 as the center, which can achieve the best centrifugal effect.

[0024] like Figure 1 As shown, a liquid-blocking cover plate 6 is provided, which covers the liquid-gas separation annular groove 4 to form a liquid-gas separation channel. The liquid-gas separation channel is a place where the gaseous liquid-gas mixture generated by high temperature during motor operation is separated. The liquid-blocking cover plate 6 and the liquid-gas separation annular groove 4 forming the liquid-gas separation channel can be fixed together by bolts, rivets, or even welding, or they can be integrally formed.

[0025] To achieve better liquid-gas separation, the liquid-gas separation channel formed by the liquid-blocking cover plate 6 covering the liquid-gas separation annular groove 4 must be as long as possible. In order to extend the liquid-gas separation channel as much as possible within the narrow motor space and thus extend the path of the liquid-gas mixture, thereby ensuring that the gas that ultimately reaches the breather valve contains no or very little coolant, thereby extending the service life of the breather valve, the number of spiral turns can be designed as much as possible based on the actual size of the end cap 7 to extend the path of the liquid-gas mixture as much as possible.

[0026] The liquid-gas separation channel is provided with air exchange ports. The air exchange ports are openings at the start and end of the liquid-gas separation annular groove 4. The opening of the liquid-gas separation annular groove 4 starting from the center hole 1 is the inner air exchange port 52, and the opening at the end of the liquid-gas separation annular groove 4 is the outer air exchange port 51.

[0027] The spiral rotation direction of the liquid-gas separation annular groove 4 is opposite to the rotation direction of the motor, so that the coolant can be thrown out from the liquid-gas separation annular groove 4 by centrifugal force. The opening direction of the external air exchange port 51 is opposite to the rotation direction of the motor.

[0028] Furthermore, the liquid-gas separation annular groove 4 is centered on the central hole 1 and its width gradually widens from the inside to the outside. This not only extends the flow path of the liquid-gas mixture, but also more effectively and promptly ejects the liquefied coolant in the liquid-gas separation annular groove 4 from the external air exchange port 51.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. In other words, any equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the technical scope of the present invention.

Claims

1. A spiral liquid-gas separation structure, characterized by: It comprises an end cover (2) provided with a central hole (1), a spiral liquid-gas separation channel is provided around the central hole (1), and an air exchange port is provided in the liquid-gas separation channel.

2. The spiral liquid-gas separation structure according to claim 1, characterized in that: The liquid-gas separation channel comprises a liquid-gas separation annular groove (4) and a liquid-blocking cover plate (6) arranged around the central hole (1). The liquid-gas separation annular groove (4) is a spiral annular groove with a variable diameter from the inside to the outside and centered on the central hole (1). The liquid-gas separation channel is formed by covering the liquid-gas separation annular groove (4).

3. The spiral liquid-gas separation structure according to claim 2, characterized in that: The spiral rotation direction of the liquid-gas separation annular groove (4) is opposite to the rotation direction of the motor.

4. The spiral liquid-gas separation structure according to claim 3, characterized in that: With the central hole (1) as the center, the width of the liquid-gas separation annular groove (4) gradually widens from the inside to the outside.

5. The spiral liquid-gas separation structure according to claim 4, characterized in that: The air exchange port is the opening at the starting point and the ending point of the liquid-gas separation annular groove (4). The opening of the liquid-gas separation annular groove (4) starting from the center hole (1) is the inner air exchange port (52), and the opening at the ending point of the liquid-gas separation annular groove (4) is the outer air exchange port (51).

6. The spiral liquid-gas separation structure according to claim 5, characterized in that: The opening direction of the external air exchange port (51) is opposite to the rotation direction of the motor.

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