Oil-gas separator and oil-gas separation device

Abstract

The utility model relates to an oil-gas separator and an oil-gas separation device, and the oil-gas separator comprises an upper cover plate, a lower cover plate and a filter chip arranged between the upper cover plate and the lower cover plate. The oil-gas separation device comprises an end cover with a center hole, and an oil-gas separator is arranged on the outer wall of the center hole. According to the oil-gas separator and the oil-gas separation device, gaseous cooling liquid generated by high temperature in operation of the motor can be fully separated from an air mixture, the oil-gas separator is convenient to replace so as to prolong the service life of the motor, and the problem that in the prior art, the cooling liquid damages the air permeability of a ventilation valve is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub motors, in particular to an oil-gas separator and an oil-gas separation device. Background Art

[0002] The motor will generate heat during operation. In order to allow the motor movement to dissipate heat quickly and keep the motor working efficiently in the appropriate temperature range, insulating liquid is injected into the motor to achieve the purpose of quickly dissipating the heat of the motor. In the oil-cooled motor, due to the high temperature and high-speed rotating rotor, part of the coolant inside the motor housing will be atomized to form a gaseous liquid-gas mixture, which will make the pressure inside the motor housing too high, posing a great challenge to the motor seal. Motors with poor sealing will leak oil at this time, so the inside of the oil-cooled motor housing must be depressurized.

[0003] The common method in the prior art is to install a breathable valve on the motor housing and use the breathable membrane on the breathable valve to exchange gas inside and outside the motor. However, the high temperature of the motor operation causes the coolant to atomize, and the gaseous liquid-gas mixture formed will also diffuse to the breathable valve. When the atomized coolant in the liquid-gas mixture is cooled into droplets, it will adhere to the breathable membrane, eventually causing the breathable membrane to lose its gas permeability. Therefore, how to prevent the liquid-gas mixture from diffusing to the breathable valve is a problem that current liquid-cooled motors need to solve.

[0004] Chinese invention application CN117639352A discloses a liquid-cooled motor liquid-blocking maze structure, including a mounting plate, a center hole is provided on the mounting plate, and also includes a labyrinth liquid-blocking part installed on the mounting plate, the labyrinth liquid-blocking part is annular in structure and distributed around the center hole, an air permeable channel is provided in the labyrinth liquid-blocking part, a first air port and a second air port communicating with the air permeable channel are provided on the labyrinth liquid-blocking part, and a main liquid-blocking plate is provided at each air port; and also includes an air valve mounting hole for mounting an air valve provided on the labyrinth liquid-blocking part and / or the mounting plate, and gas entering the air channel through the air port can be discharged through the air valve installed on the air valve mounting hole.

[0005] In the above-mentioned labyrinth structure, the main liquid baffle plate strives to block the coolant outside the air vent; but some coolant will still enter the air vent through the air vent. Since the labyrinth liquid baffle is a ring-shaped 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 provided for the liquid-gas mixture to run is too short. The liquid coolant may be centrifuged out, but there will still be a certain amount of uncondensed liquid-gas mixture in gaseous state reaching the breathable valve. When the liquid-gas mixture is condensed, 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 utility model aims to provide an oil-gas separator and an oil-gas separation device, which can fully separate the gaseous cooling oil and air mixture generated by the high temperature of the motor operation through the oil-gas separator, thereby solving the problem of the cooling oil damaging the air permeability of the air vent in the prior art.

[0008] To achieve the above purpose, the technical solution of the utility model is:

[0009] An oil-gas separator comprises an upper cover plate, a lower cover plate and a filter chip arranged between the upper cover plate and the lower cover plate.

[0010] The upper cover plate, the filter chip and the lower cover plate are all in annular shape. A plurality of filter chips are arranged and are arranged in sequence and at intervals between the upper cover plate and the lower cover plate.

[0011] An outer filter support is arranged between the upper cover plate and the lower cover plate and at the outer edge of the filter chip, and an inner filter support is arranged between the upper cover plate and the lower cover plate and at the inner edge of the filter chip.

[0012] The filter element is a wavy ring structure.

[0013] An oil-gas separation device comprises an end cover provided with a central hole, wherein an air-permeable valve mounting hole and an oil injection hole are provided on an outer wall of the central hole;

[0014] The oil-gas separator mentioned above is arranged on the outer wall of the central hole.

[0015] A filtering device is arranged between the outer wall of the center hole and the inner circle of the lower cover plate of the oil-gas separator.

[0016] The outer wall of the central hole is provided with a protrusion formed by the air-permeable valve mounting hole and the oil filling hole. The filter device is annular, and the inner wall of the annular is provided with a groove corresponding to the protrusion.

[0017] The filter device is a filter made of stainless steel mesh or glass fiber or polyurethane.

[0018] The advantages of the utility model are: 1. The filter chips in the oil-gas separator are wavy, and the filter chips are stacked at intervals, which increases the adhesion area of ​​the oil droplets; 2. The design of the oil retaining ring reduces the amount of cooling oil entering the oil-gas separator, and the angle between the inner wall of the oil retaining ring and the end cover is obtuse. When the motor stops rotating, the cooling oil drips to the outside of the oil retaining ring through the inner wall of the oil retaining ring due to gravity; 3. A filtering device is arranged in the space between the center hole and the oil-gas separator, which can further retain the cooling oil condensed during the operation of the liquid-gas mixture, and then thrown out by centrifugal force, so as to further improve the oil-gas separation effect and ensure that the cooling oil will not enter the position of the breathable valve; 4. The multiple settings of the oil retaining ring, oil-gas separator, inner oil retaining ring and filtering device ensure that the oil-gas mixture can be fully separated; 5. It is easy to assemble, and if there is too much oil stain, it does not need to be cleaned, and the oil-gas separator can be directly replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the oil-gas separator of the utility model.

[0020] Figure 2 It is an exploded diagram of the oil-gas separator structure of the utility model.

[0021] Figure 3 It is a structural sectional view of the oil-gas separator of the utility model.

[0022] Figure 4 It is a structural schematic diagram of the oil-gas separation device of the utility model.

[0023] Figure 5 This is a cross-sectional view of the structure of the oil and gas separation device of the utility model. Figure 1 .

[0024] Figure 6 This is a cross-sectional view of the structure of the oil and gas separation device of the utility model. Figure 2 .

[0025] In the figure: 1-center hole; 11-outer wall of center hole; 12-mounting hole; 2-end cover; 3-oil-gas separator; 31-upper cover; 311-central through hole; 312-fixing hole; 32-lower cover; 33-filter chip; 34-external support of filter screen; 35-inner support of filter screen; 4-oil retaining ring; 41-inner wall of oil retaining ring; 5-filter device; 6-vent valve mounting hole; 7-oil filling hole. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings. The accompanying drawings are only used for exemplary description and cannot be understood as limiting the present patent.

[0027] In order to more concisely describe the present embodiment, some parts known to those skilled in the art but not related to the main content of the present invention are omitted in the drawings or descriptions. In addition, for the convenience of description, some parts in the drawings are omitted, enlarged or reduced, but they do not represent the size or entire structure of the actual product.

[0028] The utility model is an oil-gas separator, such as Figure 1-3 As shown, it includes an upper cover plate 31 , a lower cover plate 32 and a filter chip 33 arranged between the upper cover plate 31 and the lower cover plate 32 .

[0029] Furthermore, the upper cover plate 31 , the filter chip 33 and the lower cover plate 32 are all in annular shape, and a plurality of filter chips 33 are provided, which are sequentially spaced between the upper cover plate 31 and the lower cover plate 32 , and a gap is left between two adjacent chips.

[0030] An outer filter bracket 34 is provided between the upper cover plate 31 and the lower cover plate 32 and at the outer edge of the filter chip 33. An inner filter bracket 35 is provided between the upper cover plate 31 and the lower cover plate 32 and at the inner edge of the filter chip 33. The filter chip 33 is fixed on the outer filter bracket 34 and the inner filter bracket 35. The filter chip 33 maintains a gap when being fixed.

[0031] The filter chips 33 can be made into a wave-shaped circular ring structure, and the filter chips 33 can be stacked alternately, so that gaps can be formed between the filter chips 33. Moreover, the wave-shaped filter chips 33 also increase the attachment area of ​​the oil droplets.

[0032] An oil-gas separation device, such as Figure 4-6 As shown, it includes an end cover 2 with a center hole 1, and an outer wall 11 of the center hole is provided with a breathable valve mounting hole 6 and an oil filling hole 7; the outer wall 11 of the center hole is provided with the oil-gas separator 3 as mentioned above.

[0033] like Figure 4 As shown, the upper cover plate 31 of the oil-gas separator 3 is a circular plate provided with a central through hole 311, and the central through hole 311 is connected with the center hole 1; the lower cover plate 32 is annular, and its inner circle radius is larger than the radius of the center hole 1; the filter chip 33 is annular, and its outer circle radius is smaller than the outer circle radius of the lower cover plate 32, and its inner circle radius is larger than the inner circle radius of the lower cover plate 32. The outer wall 11 of the center hole is provided with a mounting hole 12, and the upper cover plate 31 is correspondingly provided with a fixing hole 312. The oil-gas separator 3 can be fixed in the end cover 2 by screws or other fixings through the fixing hole 312 and the mounting hole 12, and rotates with the end cover 2.

[0034] Similarly, the design of the oil-gas separator 3 is convenient for disassembly and replacement. When the motor is used for an extended period of time, the oil-gas separator 3 can be replaced to ensure the oil-gas separation effect.

[0035] like Figure 4-6As shown, in order to further ensure that the gas diffused to the breathable valve does not contain cooling oil, a filter device 5 is arranged between the outer wall 11 of the center hole and the inner circle of the lower cover plate 32 of the oil-gas separator 3. Since there is a protrusion formed by the oil injection hole 7 and the breathable valve mounting hole 6 on the outer wall 11 of the center hole, the filter device 5 is correspondingly arranged in an annular shape, and the inner wall of the annular shape is provided with a groove corresponding to the protrusion. This not only can well fix the filter device 5, but also ensure that the filter device 5 will not move or rotate when the motor is running.

[0036] The filter device 5 is a filter made of stainless steel mesh, glass fiber or polyurethane. The filter will intercept the atomized cooling oil in the high-temperature oil-gas mixture that finally reaches the vicinity of the central hole 1, aggregate it into oil droplets and throw it out under the action of centrifugal force, thereby ensuring that the gas passing through the breathable valve does not contain cooling oil.

[0037] Furthermore, if Figure 4-6 As shown, an oil retaining ring 4 is arranged in the end cover 2. The oil retaining ring 4 is a circular ring centered on the center hole 1. When the motor is running to drive the cooling oil, the oil retaining ring 4 blocks most of the cooling oil, so that the cooling oil cannot enter the oil retaining ring 4 and then pollute the breathable valve. The oil-gas separator 3 is arranged between the outer wall 11 of the center hole and the oil retaining ring 4.

[0038] like Figure 5 , 6 As shown, the angle between the inner wall 41 of the oil deflector ring and the bottom of the end cover 2 is an obtuse angle greater than 90 degrees. In this way, after the motor stops running, the cooling oil entering the oil deflector ring 4 will also flow downward and along the inner wall 41 of the oil deflector ring to the outside of the oil deflector ring 4 under the action of gravity, and will not gather in the oil deflector ring 4 to pollute the air valve.

[0039] During the operation of the motor, the oil-gas separator 3 rotates with the end cover 2. During the operation, most of the cooling oil brought up by the rotation of the motor is blocked by the oil retaining ring 4. Only a small amount of cooling oil and the high-temperature oil-gas mixture generated during the operation of the motor enter the oil retaining ring 4 and then enter the oil-gas separator 3. The condensed oil droplets in the cooling oil and the high-temperature oil-gas mixture will adhere to the filter chip 33 and be thrown out by centrifugal force. In addition, the filter chip 33 is made into a wavy ring structure, and its oil droplet adhesion area is greatly increased, so that more oil droplets are attached to the filter chip 33 and thrown out by centrifugal force, which greatly reduces the amount of oil droplets reaching the breathable valve.

[0040] In order to prevent more cooling oil from entering the vicinity of the central hole 1 , the height of the oil retaining ring 4 is higher than the height of the oil-gas separator 3 .

[0041] In this way, the oil-gas separation device of the utility model is equipped with multiple separation devices including an oil retaining ring 4, an oil-gas separator 3 and a filter device 5 for the cooling oil and oil-gas mixture in the motor. The device can fully separate the gaseous oil-gas mixture generated by the high temperature during the operation of the motor, ensuring that the gas diffused to the breathable valve does not contain cooling oil.

[0042] 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. That is, any equivalent changes and modifications made according to the content of the patent application scope of the present invention should be within the technical scope of the present invention.

Claims

1. An oil-gas separator, characterized in that: It comprises an upper cover plate (31), a lower cover plate (32), and a filter chip (33) arranged between the upper cover plate (31) and the lower cover plate (32).

2. The oil-gas separator according to claim 1, characterized in that: The upper cover plate (31), the filter chip (33) and the lower cover plate (32) are all in an annular shape, and a plurality of filter chips (33) are provided, which are sequentially spaced apart between the upper cover plate (31) and the lower cover plate (32).

3. The oil-gas separator according to claim 2, characterized in that: An outer filter support (34) is provided between the upper cover plate (31) and the lower cover plate (32) and at the outer edge of the filter core (33), and an inner filter support (35) is provided between the upper cover plate (31) and the lower cover plate (32) and at the inner edge of the filter core (33).

4. The oil-gas separator according to claim 2, characterized in that: The filter chip (33) is a wavy ring structure.

5. An oil-gas separation device, comprising an end cover (2) provided with a central hole (1), wherein an outer wall (11) of the central hole is provided with a breathable valve mounting hole (6) and an oil injection hole (7); Features: The outer wall (11) of the central hole is provided with an oil-gas separator (3) according to any one of claims 1 to 4.

6. The oil-gas separation device according to claim 5, characterized in that: A filtering device (5) is provided between the outer wall (11) of the central hole and the oil-gas separator (3).

7. The oil-gas separation device according to claim 6, characterized in that: The outer wall (11) of the central hole has a protrusion formed by the air-permeable valve mounting hole (6) and the oil injection hole (7); the filter device (5) is annular, and the inner wall of the annular shape is provided with a groove corresponding to the protrusion.

8. The oil-gas separation device according to claim 7, characterized in that: The filter device (5) is a filter made of stainless steel mesh or glass fiber or polyurethane.

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