Oil-gas separation labyrinth for reducer based on oil surface filtration and its design method

Abstract

The present invention discloses a reducer oil-gas separation labyrinth mainly based on oil surface filtration, which has enclosures arranged on the upper inner walls of the front shell and the rear shell, and the enclosures enclose a labyrinth cavity; an oil accumulation groove is formed at the bottom of the labyrinth cavity, an airflow panel is arranged above the oil accumulation groove, and an air gap is arranged on one side of the enclosure; one side of the airflow panel is connected to the enclosure above the air gap, and the other side of the airflow panel is spaced from the enclosure on the other side; the mixed gas formed in the gear cavity of the reducer enters from the air gap, enters the labyrinth cavity through the bottom of the airflow panel, and contacts with the surface of the oil surface when flowing through the bottom of the airflow panel, so that the oil foam and oil vapor in the mixed gas are melted into the accumulated oil, and the mixed gas filtered by the oil contact continues to be further condensed and separated in the airway above the labyrinth cavity. The advantage of the present invention is that after two separations of oil accumulation filtration and air path condensation, the oil and gas separation efficiency is significantly improved, and the problem of oil overflow at the exhaust valve port is completely solved.

Description

Technical Field

[0001] The invention relates to a reducer oil and gas separation exhaust device, in particular to a reducer oil and gas separation maze mainly based on oil surface filtration and a design method, belonging to the technical field of reducer manufacturing. Background Art

[0002] The housing of the reducer is formed by the front housing and the rear housing; the inner cavity of the housing is a closed gear cavity, and there is lubricating oil for lubricating the gears in the lower part of the cavity. When the reducer is working, the rotating gears cause the lubricating oil to splash, and the oil droplets with extremely small diameters form a mixed gas with the air in the cavity. When the working temperature of the reducer rises, the pressure in the cavity increases. If it is not discharged in time, the lubricating oil will leak out along all the seals. In order to avoid this phenomenon, a vent valve is set at the upper part of the reducer housing, and an oil-gas separation labyrinth is set at the lower part of the vent valve, which is used to discharge the separated gas outward through the vent valve under pressure when the air pressure in the cavity increases. However, since the labyrinth designed in the prior art is too simple, only a buffer chamber is set on the necessary path of the oil-gas mixture, and the oil-gas separation effect is very limited. The gas discharged through the vent valve still contains a large amount of oil foam, oil mist, oil vapor, etc., which leads to the loss of lubricating oil in the shell and affects the lubrication effect. Summary of the invention

[0003] The technical problem to be solved by the present invention is mainly that the prior art has poor separation effect on oil and gas after the oil and gas mixture passes through the labyrinth, and the oil content of the discharged gas is still relatively high.

[0004] In view of the above problems, the technical solution proposed by the present invention is:

[0005] A reducer oil-gas separation maze with oil liquid surface filtration as the main function is provided, comprising a front enclosure arranged on the upper part of the inner wall of the front shell body and a rear enclosure arranged on the upper part of the inner wall of the rear shell body, the rear end face of the front enclosure is fitted with the front end face of the rear enclosure to form a maze cavity, a vent valve capable of exhausting air to the outside of the shell is provided on the front shell body above the maze cavity, a front oil storage groove and a rear oil storage groove are provided on the front enclosure and the rear enclosure at the bottom of the maze cavity respectively; a front airflow panel and a rear airflow panel are provided at the notch above the front oil storage groove and the rear oil storage groove respectively, the rear end face of the front airflow panel is fitted with the front end face of the rear airflow panel; a connected front airflow panel is provided on the front enclosure and the rear enclosure on one side of the notch above the front oil storage groove and the rear oil storage groove One side of the front airflow panel is connected to the front baffle above the front air slit, and the other side of the front airflow panel is connected to the front baffle on the other side of the slot above the front oil accumulation groove, with a gap leading to the top of the labyrinth cavity. Correspondingly, one side of the rear airflow panel is connected to the rear baffle above the rear air slit, and the other side of the rear airflow panel is connected to the rear baffle on the other side of the slot above the rear oil accumulation groove, with a gap leading to the labyrinth cavity. The mixed gas formed in the reducer gear cavity enters from the front air slit and the rear air slit, enters the labyrinth cavity through the bottom of the front airflow panel and the rear airflow panel, and contacts the surface layer of the accumulated oil when flowing through the bottom of the front airflow panel and the rear airflow panel, so that the oil foam and oil vapor in the mixed gas are integrated into the accumulated oil.

[0006] Furthermore, one side of the front airflow panel is connected to the front enclosure above the front air gap by providing a downwardly curved front connecting plate between the one side of the front airflow panel and the front enclosure above the front air gap, and a front air intake space is formed between the lower part of the front connecting plate and the oil accumulation level formed in the front oil accumulation tank; correspondingly, a downwardly curved rear connecting plate is provided between one side of the rear airflow panel and the rear enclosure above the rear air gap, and a rear air intake space is formed between the lower part of the rear connecting plate and the oil accumulation level formed in the rear oil accumulation tank.

[0007] Furthermore, there is a gap between the bottom surfaces of the front airflow panel and the rear airflow panel and the accumulated oil liquid surface. When the mixed gas flows through the gap, the lower layer of the mixed gas contacts the accumulated oil liquid surface and the oil foam and oil vapor in the mixed gas melt into the accumulated oil.

[0008] Furthermore, the bottom surfaces of the front airflow panel and the rear airflow panel are in contact with the surface of the accumulated oil liquid, and the mixed gas passes through the surface of the accumulated oil liquid under the front airflow panel and the rear airflow panel in the form of bubbles, so that the oil foam and oil vapor in the mixed gas contact the oil liquid on the inner wall of the bubble and merge into the accumulated oil.

[0009] Furthermore, a front splitter and a rear splitter with I-shaped end faces are respectively provided in the front enclosure and the rear enclosure, so that the front splitter forms a front left airway and a front right airway in the front enclosure, and the rear splitter forms a rear left airway and a rear right airway in the rear enclosure; the rear end face of the front splitter and the front end face of the rear splitter are in contact with each other.

[0010] Furthermore, the front splitter comprises a front upper guide plate, a front lower guide plate and a front splitter plate vertically arranged between the front upper guide plate and the front lower guide plate, and the rear splitter comprises a rear upper guide plate, a rear lower guide plate and a rear splitter plate vertically arranged between the rear upper guide plate and the rear lower guide plate; a front left guide plate and a front right guide plate are respectively arranged on the left and right sides of the front splitter, the front left guide plate is located between the front upper guide plate and the front lower guide plate on the left side of the front splitter, and the left side of the front left guide plate is connected to the left side of the front enclosure, and the right side of the front left guide plate is spaced from the front splitter, and the front right guide plate is located at the front upper right side of the front splitter The left side of the rear right guide plate is connected to the right side of the rear enclosure, and there is a gap between the left side of the front right guide plate and the front splitter; correspondingly, a rear left guide plate and a rear right guide plate are respectively arranged on the left and right sides of the rear splitter, the rear left guide plate is located between the rear upper guide plate and the rear lower guide plate on the left side of the rear splitter, and the left side of the rear left guide plate is connected to the left side of the rear enclosure, and there is a gap between the right side of the rear left guide plate and the rear splitter, the rear right guide plate is located between the rear upper guide plate and the rear lower guide plate on the right side of the rear splitter, and the right side of the rear right guide plate is connected to the right side of the rear enclosure, and there is a gap between the left side of the rear right guide plate and the rear splitter.

[0011] Furthermore, the end faces of the front upper guide plate, the front lower guide plate, the rear upper guide plate, and the rear lower guide plate are all rhombus-shaped; the front left guide plate and the front right guide plate are both acute-angled triangles, and the apex of the acute angle with the smallest angle points to the front splitter plate; correspondingly, the rear left guide plate and the rear right guide plate are both acute-angled triangles, and the apex of the acute angle with the smallest angle points to the rear splitter plate.

[0012] Furthermore, a front air dividing angle or a rear air dividing angle with a corner tip pointing downward is provided below the front flow dividing piece and the rear flow dividing piece.

[0013] A design method for a reducer oil-gas separation labyrinth mainly based on oil surface filtration is to use the naturally concave inner surface of the lower part of the labyrinth cavity as an oil accumulation groove in the labyrinth cavity in the reducer housing, and deposit the oil obtained by oil and gas separation in the labyrinth cavity in the oil accumulation groove; design an oil surface filtration mechanism for oil and gas separation, so as to force the oil-containing mixed gas entering the labyrinth cavity to contact the surface of the oil liquid accumulated in the cavity and dissolve and absorb the oil in the mixed gas.

[0014] Furthermore, the oil surface filtering mechanism designed for oil and gas separation forces the oil-containing mixed gas entering the labyrinth cavity to contact the surface of the oil surface of the accumulated oil in the cavity and dissolve and absorb the oil in the mixed gas. An air inlet slit is planned to be set on the cavity wall on one side of the labyrinth cavity for the mixed gas in the shell to enter the labyrinth cavity; an air flow plate is planned to be set above the oil-accumulated oil surface, and a connecting plate is planned to be set between one side of the air flow plate and the cavity wall of the labyrinth cavity above the air inlet slit, and a gap is left between the other side of the air flow plate and the cavity wall of the labyrinth cavity on the other side to allow the filtered gas to rise into the upper cavity of the labyrinth; two types of setting heights of the air flow plates are designed: one is that there is a gap between the bottom surface of the air flow plate and the oil surface, and the other is that the bottom surface of the air flow plate is in contact with the oil surface; the air inlet slit is used as an overflow slit for the accumulated oil to flow back to the gear cavity, and the height of the lower seam edge of the air flow slit determines the height of the accumulated oil surface.

[0015] The invention has the advantages that the oil and gas separation efficiency is significantly improved through two separations of oil accumulation filtration and tortuous gas path condensation, and the oil overflow problem of the exhaust valve port is completely solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front half shell of the reducer described in Example 1;

[0017] Figure 2 This is a schematic diagram of the rear half shell of the reducer described in Example 1;

[0018] Figure 3 for Figure 1 A partial schematic diagram of

[0019] Figure 4 for Figure 2 A partial schematic diagram of

[0020] Figure 5 It is a plan view of the front diverter;

[0021] Figure 6 for Figure 1 A partial schematic diagram mainly shows the airflow route, and the direction indicated by the arrow is the airflow direction;

[0022] Figure 7 It is a partial schematic diagram of the front half maze in the first embodiment, and the figure mainly shows that there is a gap between the front airflow panel and the oil accumulation level;

[0023] Figure 8 It is a partial schematic diagram of the front half maze of the second embodiment, and mainly shows that the front airflow panel is in contact with the oil accumulation surface.

[0024] In the figure: 100, front housing; 101, front semi-labyrinth cavity; 102, front gear cavity; 1, front enclosure; 11, front oil storage tank; 12, front airflow panel; 13, front air gap; 14, front connecting plate; 15, front air intake space; 16, front splitter; 161, front upper guide plate; 162, front lower guide plate; 163, front splitter; 17, front left air duct; 18, front right air duct; 19, front left guide plate; 110, front right guide plate; 111, front air splitter angle; 200, rear housing; 201. Rear semi-maze cavity; 202. Rear gear cavity; 2. Rear enclosure; 21. Rear oil sump; 22. Rear airflow panel; 23. Rear air gap; 24. Rear connecting plate; 25. Rear air intake space; 26. Rear splitter; 261. Rear upper guide plate; 262. Rear lower guide plate; 263. Rear splitter plate; 27. Rear left air duct; 28. Rear right air duct; 29. ​​Rear left guide plate; 210. Rear right guide plate; 211. Rear air distribution angle; 3. Ventilation valve; 4. Oil level; 5. Clearance. DETAILED DESCRIPTION

[0025] When the gas with a certain pressure formed in the reducer housing needs to be discharged, the oil-containing mixed gas will cause the lubricating oil to spray outward with the gas due to the incomplete separation of oil and gas under the existing technical conditions, resulting in the loss of lubricating oil in the housing. In order to completely solve this problem, the present invention will use the oil accumulated in the labyrinth to absorb and dissolve the oil in the oil-containing mixed gas, specifically, to allow the mixed gas to pass into the accumulated oil liquid, so that the oil foam and oil in the mixed gas directly contact with the oil liquid and be dissolved and absorbed, so as to achieve a high-efficiency filtration of the oil-containing mixed gas. However, since the gas passed into the oil liquid cannot enter from the bottom of the accumulated oil liquid, the oil liquid can only be passed from one side of the oil liquid surface, and the mixed gas emerges from the other side of the accumulated oil liquid surface in the form of bubbles. If the oil liquid is passed too deep, it is necessary to form a sufficiently large pressure in the reducer housing to achieve it, and it is obviously not allowed to form too large a pressure in the reducer housing. Therefore, when adopting the effective filtering measure of oil liquid contacting and dissolving the oil in the mixed gas, it can only be achieved by contact absorption on the surface of the oil liquid surface.

[0026] like Figure 1 As shown, the positions of the front half labyrinth cavity 101 and the front gear cavity 102 of the reducer labyrinth of the present invention in the front housing 100.

[0027] like Figure 2 As shown, the positions of the rear half labyrinth cavity 201 and the rear gear cavity 202 of the reducer labyrinth of the present invention in the rear housing 200.

[0028] The present invention is described below in conjunction with embodiments and drawings:

[0029] Embodiment 1

[0030] like Figure 3 , 4As shown in , 7, a reducer oil-gas separation labyrinth mainly for oil surface filtration, comprising a front enclosure 1 arranged on the upper part of the inner wall of the front housing 100 and a rear enclosure 2 arranged on the upper part of the inner wall of the rear housing 200, the rear end face of the front enclosure 1 and the front end face of the rear enclosure 2 are fitted together to form a labyrinth cavity, and a vent valve 3 capable of exhausting air to the outside of the shell is provided on the front housing 100 above the labyrinth cavity, characterized in that: a front oil storage groove 11 and a rear oil storage groove 21 are respectively provided on the front enclosure 1 and the rear enclosure 2 at the bottom of the labyrinth cavity; a front airflow panel 12 and a rear airflow panel 22 are respectively provided at the notch above the front oil storage groove 11 and the rear oil storage groove 21, the rear end face of the front airflow panel 12 is fitted with the front end face of the rear airflow panel 22; a connected front airflow panel 12 and a rear airflow panel 22 are provided on the front enclosure 1 and the rear enclosure 2 on one side of the notch above the front oil storage groove 11 and the rear oil storage groove 21 Air gap 13 and rear air gap 23; one side of the front airflow panel 12 is connected to the front baffle 1 above the front air gap 13, and the other side of the front airflow panel 12 is connected to the front baffle 1 on the other side of the slot above the front oil accumulation groove 11, with a gap leading to the top of the labyrinth cavity. Correspondingly, one side of the rear airflow panel 22 is connected to the rear baffle 2 above the rear air gap 23, and the other side of the rear airflow panel 22 is connected to the rear baffle 2 on the other side of the slot above the rear oil accumulation groove 21, with a gap leading to the top of the labyrinth cavity; the mixed gas formed in the gear cavity of the reducer enters from the front air gap 13 and the rear air gap 23 under a certain pressure, enters the labyrinth cavity through the bottom of the front airflow panel 12 and the rear airflow panel 22, and contacts the surface layer of the oil liquid level 4 when flowing through the bottom of the front airflow panel 12 and the rear airflow panel 22, so that the oil foam and oil vapor in the mixed gas are integrated into the accumulated oil. In this way, the mixed gas can be more fully in contact with the oil, and the oil contained in the gas (oil foam, steam, etc.) is directly integrated into the oil, achieving an ideal filtering effect. At the same time, since the gas does not need to be passed into the oil too deep, there is no need for a large air pressure in the reducer housing.

[0031] Here are some further improvements.

[0032] like Figure 3 , 4As shown in Figures 7 and 8, one side of the front airflow panel 12 is connected to the front baffle 1 above the front air gap 13 by providing a downwardly curved front connecting plate 14 between the one side of the front airflow panel 12 and the front baffle 1 above the front air gap 13, and a front air intake space 15 is formed between the lower part of the front connecting plate 14 and the oil accumulation level 4 formed by the front oil accumulation groove 11; correspondingly, a downwardly curved rear connecting plate 24 is provided between the one side of the rear airflow panel 22 and the rear baffle 2 above the rear air gap 23, and a rear air intake space 25 is formed between the lower part of the rear connecting plate 24 and the oil accumulation level 4 formed by the rear oil accumulation groove 21. In the present invention, the front air gap 13 and the rear air gap 23 are not only used for air intake, but also serve as overflow gaps for the oil in the oil accumulation groove to flow back into the gear cavity. The air intake space is provided so that the mixed gas in the gear cavity can enter the front air gap 13 and the rear air gap 23, while not affecting the oil accumulation oil from the front air gap 13 and the rear air gap 23.

[0033] There is a gap 5 between the bottom surface of the front airflow panel 12 and the rear airflow panel 22 and the oil accumulation liquid surface 4. When the mixed gas flows through the gap 5, the lower layer of the mixed gas flows in contact with the oil accumulation liquid surface 4 and the oil foam and oil vapor in the mixed gas are melted into the accumulated oil. In this design, the smaller the gap 5, the better the effect. The thinner the airflow flowing through the gap 5, the more opportunities the oil foam and oil vapor in the gas have to contact the oil liquid, and the more they can be absorbed and dissolved. Obviously, in this case, the wider the width of the front airflow panel 12 and the rear airflow panel 22, the better the effect.

[0034] After filtering through the oil surface, the mixed gas still contains a certain amount of oil. In order to obtain a more thorough filtration, the inventors will solve the problem by setting up an airway and extending the airway so that more oil foam and oil vapor in the mixed gas can contact and condense with the inner wall of the airway.

[0035] like Figure 3 As shown in FIG. 6 , the front enclosure 1 and the rear enclosure 2 are respectively provided with a front splitter 16 and a rear splitter 26 with I-shaped end faces, so that the front splitter 16 forms a front left air duct 17 and a front right air duct 18 in the front enclosure 1, and the rear splitter 26 forms a rear left air duct 27 and a rear right air duct 28 in the rear enclosure 2; the rear end face of the front splitter 16 and the front end face of the rear splitter 26 are in contact with each other.

[0036] The front flow divider 16 includes a front upper flow guide plate 161, a front lower flow guide plate 162 and a front flow guide plate 163 which are arranged vertically between the front upper flow guide plate 161 and the front lower flow guide plate 162, and the rear flow divider 26 includes a rear upper flow guide plate 261, a rear lower flow guide plate 262 and a rear flow guide plate 263 which are arranged vertically between the rear upper flow guide plate 261 and the rear lower flow guide plate 262; a front left flow guide plate 19 and a front right flow guide plate 110 are also arranged on the left and right sides of the front flow divider 16, respectively, the front left flow guide plate 19 is located between the front upper flow guide plate 161 and the front lower flow guide plate 162 on the left side of the front flow divider 16, and the left side of the front left flow guide plate 19 is connected to the left side of the front enclosure 1, and there is a gap between the right side of the front left flow guide plate 19 and the front flow divider 163, and the front right flow guide plate 110 is located on the front upper flow guide plate on the right side of the front flow divider 16 The left and right sides of the rear splitter 26 are respectively provided with a rear left guide plate 29 and a rear right guide plate 210, and the rear left guide plate 29 is located between the rear upper guide plate 261 and the rear lower guide plate 262 on the left side of the rear splitter 26. 2, and the left side of the rear left guide plate 29 is connected to the left side of the rear enclosure 2, and there is a gap between the right side of the rear left guide plate 29 and the rear splitter 263, and the rear right guide plate 210 is located between the rear upper guide plate 261 and the rear lower guide plate 262 on the right side of the rear splitter 26, and the right side of the rear right guide plate 210 is connected to the right side of the rear enclosure 2, and there is a gap between the left side of the rear right guide plate 210 and the rear splitter 263. The above arrangement is to make the left and right airways form zigzag tortuous airways, which is equivalent to increasing the length and inner surface of the airway, so that the oil in the mixed gas has a more sufficient chance to condense.

[0037] The end faces of the front upper guide plate 161, the front lower guide plate 162, the rear upper guide plate 261, and the rear lower guide plate 262 are all rhombus-shaped; the front left guide plate 19 and the front right guide plate 110 are all acute triangles, and the acute angle vertex with the smallest angle points to the front splitter plate 163; correspondingly, the rear left guide plate 29 and the rear right guide plate 210 are all acute triangles, and the acute angle vertex with the smallest angle points to the rear splitter plate 263. The above-mentioned settings can make the inner walls of the airway become inclined upward slopes, which is conducive to the smooth rise of the gas and the full contact between the gas and the inner wall surface, leaving no dead corners where the gas cannot contact the inner wall. At the same time, the above-mentioned surface designs are conducive to the smooth downward flow of accumulated oil formed by condensation.

[0038] The front air dividing angle 111 or the rear air dividing angle 211 with the corner tip downward is arranged below the front flow dividing member 16 and the rear flow dividing member 26. Such arrangement is to prevent the gas filtered by the oil surface from flowing too much toward one side of the airway in the upper part of the labyrinth cavity.

[0039] Embodiment 2

[0040] like Figure 3 , 4 8, a reducer oil-gas separation labyrinth mainly based on oil surface filtration, which is different from the first embodiment in that the bottom surfaces of the front airflow panel 12 and the rear airflow panel 22 are in contact with the oil accumulation surface 4, and the mixed gas passes through the oil accumulation surface under the front airflow panel 12 and the rear airflow panel 22 in the form of bubbles, so that the oil foam and oil vapor in the mixed gas contact the oil on the inner wall of the bubble and merge into the accumulated oil. This setting requires a certain air pressure in the gear cavity, and its filtering effect is slightly better than that of the first embodiment.

[0041] A design method for a reducer oil-gas separation labyrinth mainly based on oil surface filtration is to use the naturally concave inner surface of the lower part of the labyrinth cavity as an oil accumulation groove in the labyrinth cavity in the reducer housing, and deposit the oil obtained by oil and gas separation in the labyrinth cavity in the oil accumulation groove; design an oil surface filtration mechanism for oil and gas separation, so as to force the oil-containing mixed gas entering the labyrinth cavity to contact the surface of the oil liquid accumulated in the cavity and dissolve and absorb the oil in the mixed gas.

[0042] The oil surface filtering mechanism designed for oil and gas separation forces the oil-containing mixed gas entering the labyrinth cavity to contact the surface of the oil surface of the oil accumulated in the cavity and dissolve and absorb the oil in the mixed gas. An air inlet slit is planned to be set on the cavity wall on one side of the labyrinth cavity for the mixed gas in the shell to enter the labyrinth cavity; an air flow plate is planned to be set above the oil accumulated oil surface, and a connecting plate is planned to be set between one side of the air flow plate and the cavity wall of the labyrinth cavity above the air inlet slit, and a gap is left between the other side of the air flow plate and the cavity wall of the labyrinth cavity on the other side to allow the filtered gas to rise into the upper cavity of the labyrinth; two types of setting heights of the air flow plates are designed: one is that there is a gap between the bottom surface of the air flow plate and the oil surface, and the other is that the bottom surface of the air flow plate fits the oil surface; the air inlet slit is used as an overflow slit for the accumulated oil to flow back to the gear cavity, and the height of the lower seam edge of the air flow slit determines the height of the accumulated oil surface.

[0043] The mixed gas filtered through the oil surface still contains a certain amount of oil. The space above the labyrinth cavity can be used as an airway setting so that the oil in the mixed gas can condense on the inner wall of the airway, allowing the mixed gas to achieve more thorough oil-gas separation.

[0044] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms should be regarded as falling within the protection scope of the present invention.

Claims

1. A speed reducer oil-gas separation labyrinth mainly for oil surface filtration, comprising a front enclosure (1) arranged at the upper part of the inner wall of a front housing (100) and a rear enclosure (2) arranged at the upper part of the inner wall of a rear housing (200), the rear end surface of the front enclosure (1) and the front end surface of the rear enclosure (2) being fitted together to form a labyrinth cavity, and a vent valve (3) capable of exhausting air to the outside of the housing is provided on the front housing (100) above the labyrinth cavity, characterized in that: A front oil storage groove (11) and a rear oil storage groove (21) are respectively provided on the front enclosure (1) and the rear enclosure (2) at the bottom of the labyrinth cavity; a front airflow panel (12) and a rear airflow panel (22) are respectively provided at the notches above the front oil storage groove (11) and the rear oil storage groove (21), and the rear end surface of the front airflow panel (12) is in contact with the front end surface of the rear airflow panel (22); a front air slit (13) and a rear air slit (23) are provided on the front enclosure (1) and the rear enclosure (2) on one side of the notches above the front oil storage groove (11) and the rear oil storage groove (21); one side of the front airflow panel (12) is connected to the front enclosure (1) above the front air slit (13), and the other side of the front airflow panel (12) is connected to the front oil storage groove (11). 1) There is a gap leading to the top of the labyrinth cavity between the front baffle (1) on the other side of the upper notch, and correspondingly, one side of the rear airflow panel (22) is connected to the rear baffle (2) above the rear air gap (23), and there is a gap leading to the labyrinth cavity between the other side of the rear airflow panel (22) and the rear baffle (2) on the other side of the upper notch of the rear oil accumulation groove (21); the mixed gas formed in the gear cavity of the reducer enters from the front air gap (13) and the rear air gap (23), enters the labyrinth cavity through the bottom of the front airflow panel (12) and the rear airflow panel (22), and contacts the surface of the oil accumulation oil liquid surface (4) when flowing through the bottom of the front airflow panel (12) and the rear airflow panel (22), so that the oil foam and oil vapor in the mixed gas are melted into the accumulated oil.

2. The reducer oil-gas separation labyrinth based on oil surface filtration according to claim 1 is characterized in that: One side of the front airflow panel (12) is connected to the front baffle (1) above the front air gap (13) by providing a front connecting plate (14) curved downward between the one side of the front airflow panel (12) and the front baffle (1) above the front air gap (13), and forming a front air intake space (15) between the lower part of the front connecting plate (14) and the oil accumulation level (4) formed by the front oil accumulation groove (11); correspondingly, a rear connecting plate (24) curved downward is provided between one side of the rear airflow panel (22) and the rear baffle (2) above the rear air gap (23), and forming a rear air intake space (25) between the lower part of the rear connecting plate (24) and the oil accumulation level (4) formed by the rear oil accumulation groove (21).

3. The reducer oil-gas separation labyrinth based on oil surface filtration according to claim 2 is characterized in that: There is a gap (5) between the bottom surfaces of the front airflow panel (12) and the rear airflow panel (22) and the oil accumulation liquid surface (4). When the mixed air flows through the gap (5), the lower layer of the mixed air flows in contact with the oil accumulation liquid surface (4) and causes the oil foam and oil vapor in the mixed air to melt into the accumulated oil.

4. The reducer oil-gas separation labyrinth based on oil surface filtration according to claim 2 is characterized in that: The bottom surfaces of the front airflow panel (12) and the rear airflow panel (22) are in contact with the oil accumulation liquid surface (4), and the mixed gas passes through the surface layer of the oil accumulation liquid surface under the front airflow panel (12) and the rear airflow panel (22) in the form of bubbles, so that the oil foam and oil vapor in the mixed gas contact the oil liquid on the inner wall of the bubble and merge into the accumulated oil.

5. The reducer oil-gas separation labyrinth based on oil surface filtration according to any one of claims 1 to 4, characterized in that: A front flow divider (16) and a rear flow divider (26) having I-shaped end faces are respectively provided in the front enclosure (1) and the rear enclosure (2), so that the front flow divider (16) forms a front left airway (17) and a front right airway (18) in the front enclosure (1), and the rear flow divider (26) forms a rear left airway (27) and a rear right airway (28) in the rear enclosure (2); the rear end face of the front flow divider (16) and the front end face of the rear flow divider (26) are in contact with each other.

6. The reducer oil-gas separation labyrinth based on oil surface filtration according to claim 5 is characterized in that: The front flow divider (16) comprises a front upper flow guide plate (161) and a front lower flow guide plate (162) which are arranged transversely, and a front flow divider plate (163) which is arranged vertically between the front upper flow guide plate (161) and the front lower flow guide plate (162); the rear flow divider (26) comprises a rear upper flow guide plate (261) and a rear lower flow guide plate (262) which are arranged transversely, and a rear flow divider plate (263) which is arranged vertically between the rear upper flow guide plate (261) and the rear lower flow guide plate (262); ) are also provided with a front left guide plate (19) and a front right guide plate (110) on the left and right sides, respectively; the front left guide plate (19) is located between the front upper guide plate (161) and the front lower guide plate (162) on the left side of the front flow divider (16); the left side of the front left guide plate (19) is connected to the left side of the front enclosure (1); the right side of the front left guide plate (19) is spaced from the front flow divider (163); the front right guide plate (110) is located between the front upper guide plate (161) and the front lower guide plate (162) on the right side of the front flow divider (16); The front right guide plate (110) is connected to the right side of the front enclosure (1), and the left side of the front right guide plate (110) is spaced from the front splitter plate (163); correspondingly, a rear left guide plate (29) and a rear right guide plate (210) are respectively arranged on the left and right sides of the rear splitter member (26), and the rear left guide plate (29) is located between the rear upper guide plate (261) and the rear lower guide plate (262) on the left side of the rear splitter member (26). 2), and the left side of the rear left guide plate (29) is connected to the left side of the rear enclosure (2), and a gap is formed between the right side of the rear left guide plate (29) and the rear splitter plate (263); the rear right guide plate (210) is located between the rear upper guide plate (261) and the rear lower guide plate (262) on the right side of the rear splitter (26), and the right side of the rear right guide plate (210) is connected to the right side of the rear enclosure (2), and a gap is formed between the left side of the rear right guide plate (210) and the rear splitter plate (263).

7. The reducer oil-gas separation labyrinth based on oil surface filtration according to claim 6 is characterized by: The end faces of the front upper guide plate (161), the front lower guide plate (162), the rear upper guide plate (261), and the rear lower guide plate (262) are all in the shape of a rhombus; the front left guide plate (19) and the front right guide plate (110) are all in the shape of an acute triangle, with the apex of the acute angle with the smallest angle pointing toward the front splitter plate (163); correspondingly, the rear left guide plate (29) and the rear right guide plate (210) are all in the shape of an acute triangle, with the apex of the acute angle with the smallest angle pointing toward the rear splitter plate (263).

8. The reducer oil-gas separation labyrinth based on oil surface filtration according to claim 6 is characterized in that: A front air dividing angle (111) or a rear air dividing angle (211) with a tip pointing downward is provided below the front flow dividing piece (16) and the rear flow dividing piece (26).

9. A design method for a speed reducer oil-gas separation labyrinth based on oil surface filtration as claimed in claim 1, characterized in that: The inner surface of the labyrinth cavity in the reducer housing is used as an oil storage groove, and the oil obtained by oil and gas separation in the labyrinth cavity is deposited in the oil storage groove; the oil liquid surface filtering mechanism for oil and gas separation is designed to force the oil-containing mixed gas entering the labyrinth cavity to contact with the surface of the oil liquid surface of the oil accumulated in the cavity and dissolve and absorb the oil in the mixed gas.

10. The design method according to claim 9, characterized in that: The oil surface filtering mechanism designed for oil and gas separation forces the oil-containing mixed gas entering the labyrinth cavity to contact the surface of the oil surface of the oil accumulated in the cavity and dissolve and absorb the oil in the mixed gas. An air inlet slit is planned to be set on the cavity wall on one side of the labyrinth cavity for the mixed gas in the shell to enter the labyrinth cavity; an air flow plate is planned to be set above the oil accumulated oil surface, and a connecting plate is planned to be set between one side of the air flow plate and the cavity wall of the labyrinth cavity above the air inlet slit, and a gap is left between the other side of the air flow plate and the cavity wall of the labyrinth cavity on the other side to allow the filtered gas to rise into the upper cavity of the labyrinth; two types of setting heights of the air flow plates are designed: one is that there is a gap between the bottom surface of the air flow plate and the oil surface, and the other is that the bottom surface of the air flow plate fits the oil surface; the air inlet slit is used as an overflow slit for the accumulated oil to flow back to the gear cavity, and the height of the lower seam edge of the air flow slit determines the height of the accumulated oil surface.

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