Oil and gas separation device

Abstract

The utility model discloses an oil-gas separation device, which belongs to the technical field of oil-gas separation, and comprises an outer shell, a filter element assembly arranged in the outer shell, and a driving assembly for driving the filter element assembly to rotate, wherein the filter element assembly comprises an inner shell and an annular filter layer arranged in the inner shell; a first space is formed on the inner diameter side of the annular filter layer, a second space is formed between the annular filter layer and the inner shell, and a third space is formed between the inner shell and the outer shell; the first space is connected with the second space through the pores of the annular filter layer, and the second space is connected with the third space through the oil-slinging hole arranged on the inner shell; an inner guide plate for radial flow guidance is arranged in the first space; the outer shell is provided with an air inlet, an air outlet and an oil outlet, the air inlet is connected with the first space, the air outlet is connected with the second space and the third space, and the oil outlet is connected with the third space. The utility model can improve the passing capacity of oil and gas, prolong the service life, and perform oil and gas separation twice in the second space and the third space successively, thereby improving the oil and gas separation effect.

Description

Technical Field

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

[0002] During the operation of the internal combustion engine, blowby gas will be generated. If the blowby gas is not discharged in time in the crankcase, the crankcase pressure will be too high, affecting the normal operation of the internal combustion engine. Blowby gas contains impurities such as engine oil and colloid. Direct discharge into the atmosphere will cause air pollution and fail to meet emission standards. In addition, blowby gas will cause the engine oil of the internal combustion engine to lose oil, resulting in poor lubrication of the internal combustion engine. Therefore, it is necessary to separate the engine oil contained in the blowby gas in order to recycle the engine oil.

[0003] In the prior art, a filter element type oil-gas separator is usually used. When the blow-by gas passes through the filter element, impurities in the blow-by gas can be effectively filtered out. However, after long-term use, the filter element will gradually be clogged. If it is not maintained in time, the crankcase pressure will increase, and in severe cases, it will cause crankcase oil leakage.

[0004] In order to avoid the replacement of the filter element and increase the service life of the separator, a Chinese patent with the authorization announcement number CN 208918624 U proposes an automobile engine oil-gas separation device, which removes the oil in the crankcase exhaust gas by means of centrifugal force and inertia through spiral rotation. Although this solution improves the ability of blowby gas to pass through the filter element, it is difficult to achieve a good oil-gas separation effect.

[0005] In summary, how to further improve the oil-gas separation effect on the basis of ensuring the good passing capacity of the filter element is a technical problem that needs to be solved. Utility Model Content

[0006] The purpose of the utility model is to provide an oil-gas separation device to solve the problems existing in the above-mentioned prior art. By driving the filter element assembly to rotate, the oil and gas entering the first space enter the second space and the third space in turn under the action of centrifugal force, which can improve the passing capacity of the oil and gas and extend the service life. The oil and gas are separated twice in the second space and the third space successively, thereby improving the oil and gas separation effect.

[0007] To achieve the above purpose, the utility model provides the following solutions:

[0008] The utility model provides an oil-gas separation device, comprising a housing, a filter element assembly arranged in the housing, and a driving assembly for driving the filter element assembly to rotate, wherein the filter element assembly comprises an inner housing and an annular filter layer arranged in the inner housing;

[0009] A first space is formed on the inner diameter side of the annular filter layer, a second space is formed between the annular filter layer and the inner shell, and a third space is formed between the inner shell and the outer shell; the first space is connected to the second space through the pores of the annular filter layer, and the second space is connected to the third space through the oil-slinging holes provided on the inner shell; an inner guide plate for radial flow guidance is provided in the first space;

[0010] The housing is provided with an air inlet, an air outlet and an oil outlet, the air inlet is connected to the first space, the air outlet is connected to the second space and the third space, and the oil outlet is connected to the third space.

[0011] Preferably, outer guide vanes for radial flow guidance are further provided in the second space, and the inner guide vanes and the outer guide vanes are both distributed radially.

[0012] Preferably, it also includes a central axis, an upper end cover and a lower end cover, the inner diameter side of the inner guide plate is connected to the central axis, the top and bottom of the inner guide plate are respectively connected to the upper end cover and the lower end cover, and the upper end cover is opened or provided with a first channel connecting the air inlet and the first space on the inner diameter side; the outer diameter side of the outer guide plate is connected to the inner shell, the top and bottom of the outer guide plate are respectively connected to the upper end cover and the lower end cover, and the upper end cover is opened or provided with a second channel connecting the second space and the third space on the outer diameter side.

[0013] Preferably, the inner guide vane comprises an upper inner guide vane and a lower inner guide vane which are axially segmented, and the upper inner guide vane and the lower inner guide vane are respectively connected to the upper end cover and the lower end cover; or the inner guide vane is not segmented, and the inner guide vane is connected to the upper end cover and / or the lower end cover.

[0014] Preferably, the outer guide vane comprises an upper outer guide vane and a lower outer guide vane which are axially segmented, and the upper outer guide vane and the lower outer guide vane are respectively connected to the upper end cover and the lower end cover; or the outer guide vane is not segmented, and the outer guide vane is connected to the upper end cover and / or the lower end cover.

[0015] Preferably, the lower outer guide vanes are spaced between the upper outer guide vanes, and the oil-swinging holes are provided at positions of the lower outer guide vanes corresponding to the inner shell and higher than the lower outer guide vanes.

[0016] Preferably, it also includes an upper bearing assembly, which is installed in the upper inner part of the outer shell, and the upper bearing assembly includes a deflector and an upper bearing hole connected to the top of the deflector, and the upper bearing hole is installed with an upper bearing for supporting the central axis, and the top of the deflector is surrounded by the upper bearing hole to provide a through hole connecting the air inlet and the first space.

[0017] Preferably, it also includes a lower bearing assembly, which is installed in the lower inner part of the shell. The lower bearing assembly includes a lower bearing seat and a lower bearing installed on the lower bearing seat, and the lower bearing is used to support the central axis.

[0018] Preferably, the inner shell adopts a first conical cylinder structure, and the top diameter of the first conical cylinder structure is smaller than the bottom diameter.

[0019] Preferably, the shell adopts a second conical cylinder structure, the top diameter of the second conical cylinder structure is smaller than the bottom diameter, and the top diameter of the second conical cylinder structure is larger than the bottom diameter of the first conical cylinder.

[0020] Preferably, the inner wall of the second conical cylinder is provided with an axially extending guide groove and a circumferentially extending step structure, wherein the step structure is located at the top end of the guide groove and is used to block the oil from flowing upward.

[0021] Preferably, the driving assembly comprises a driving motor, and the driving motor is directly connected to the central shaft or is connected to the central shaft through a gear drive.

[0022] Preferably, the driving assembly includes an impeller, which is sleeved and mounted on the central shaft. A nozzle is provided on the radial outer side of the impeller, and the nozzle sprays air or liquid toward the impeller. The rotation of the impeller drives the central shaft to rotate.

[0023] Preferably, the impeller is located in the base, the nozzle is used to spray the post-pump oil of the engine, and an oil return port is provided at the bottom of the base.

[0024] Preferably, it also includes a magnet, which is installed on the upper end cover and is used to measure the rotation speed of the filter element assembly through the Hall principle.

[0025] Compared with the prior art, the utility model has achieved the following technical effects:

[0026] The utility model utilizes a driving component to drive the filter element component to rotate, so that the oil and gas entering the first space enter the second space and the third space in turn under the action of centrifugal force, and the rotating annular filter layer can form an arc path for the oil, thereby extending the filtering path and improving the separation efficiency of the oil. At the same time, under the action of centrifugal force, the passing capacity of the oil and gas can be improved, and the service life can be extended. The oil and liquid after the oil and gas separation in the second space enters the third space and is separated again in the third space, thereby improving the defect that the separated gas carries the oil again, which is equivalent to carrying out two oil and gas separations in succession, and effectively improving the oil and gas separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2 Schematic diagram of gas flow;

[0030] Figure 3 It is a schematic diagram of oil flow;

[0031] Figure 4 is a schematic diagram of a filter element assembly;

[0032] Figure 5 is a schematic diagram of the inner shell and its internal structure;

[0033] Figure 6 is a schematic diagram of the lower end cover and its internal structure;

[0034] Figure 7 is a schematic diagram of the housing;

[0035] Figure 8 is a schematic diagram of the upper bearing assembly;

[0036] Among them, 1. air inlet; 2. upper bearing assembly; 3. central shaft; 4. filter element assembly; 5. lower bearing assembly; 6. drive assembly; 7. housing;

[0037] 21. air deflector; 22. upper bearing hole; 23. upper bearing; 24. through hole;

[0038] 41. upper end cover; 411. inner guide vane; 4111. upper inner guide vane; 4112. lower inner guide vane; 412. outer guide vane; 4121. upper outer guide vane; 4122. lower outer guide vane; 413. magnetic steel; 42. annular filter layer; 43. lower end cover; 431. oil-slinging hole; 44. inner shell;

[0039] 51. lower bearing; 52. lower bearing seat;

[0040] 61. Impeller; 62. Nozzle; 63. Base; 64. Oil return port;

[0041] 71. Air outlet; 72. Step structure; 73. Guide groove. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] The purpose of the utility model is to provide an oil-gas separation device to solve the problems existing in the prior art. By driving the filter element assembly to rotate, the oil and gas entering the first space enter the second space and the third space in turn under the action of centrifugal force, which can improve the passing capacity of the oil and gas and extend the service life. The oil and gas are separated twice in the second space and the third space in turn, thereby improving the oil and gas separation effect.

[0044] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] like Figures 1 to 7 As shown, the utility model provides an oil-gas separation device, including a housing 7, a filter element assembly 4 arranged in the housing 7, and a driving assembly 6 for driving the filter element assembly 4 to rotate. The driving assembly 6 can adopt a known power source, such as a hydraulic motor, an electric motor, etc. The driving assembly 6 is generally arranged outside the housing 7, and the filter element assembly 4 inside the housing 7 is driven by the driving assembly 6 to rotate. Of course, the driving assembly 6 can also be provided with a protective shell. The filter element assembly 4 includes an inner shell 44 and an annular filter layer 42 arranged in the inner shell 44. The annular filter layer 42 and the inner shell 44 are mutually sleeved, and there is a certain gap between the two. The annular filter layer 42 has pores for oil and gas to pass through, and has the function of intercepting oil and passing oil. The annular filter layer 42 adopts existing materials and is not specifically restricted. The main function of the annular filter layer 42 is to accumulate small particle oil droplets into large particles through dispersion, and then pass through the annular filter layer 42 under the action of centrifugal force and throw to the inner wall of the inner shell 44. As the filter element assembly 4 rotates, the annular filter layer 42 rotates accordingly. At this time, the oil entering the annular filter layer 42 has an arc-shaped movement path. Compared with the existing static filter layer, the filtration path can be effectively extended, and the interception efficiency of the oil is improved, that is, the oil-gas separation efficiency is improved. The oil impurities in the annular filter layer 42 are thrown out by centrifugal force, which can complete the self-cleaning of the annular filter layer 42 and extend its service life.

[0046] The inner diameter side of the annular filter layer 42 forms a first space, the annular filter layer 42 and the inner shell 44 form a second space, and the inner shell 44 and the outer shell 7 form a third space. The three spaces are interconnected. Specifically, the first space and the second space are connected through the pores of the annular filter layer 42, and the second space and the third space are connected through the oil-slinging hole 431 provided on the inner shell 44. The oil-slinging hole 431 is preferably provided at a position close to the bottom of the inner shell 44 so that the oil impurities in the second space can enter the third space as much as possible. An inner guide plate 411 for radial flow guidance is provided in the first space. The inner guide plate 411 rotates with the rotation of the annular filter layer 42. The inner guide plate 411 generates suction from upstream to downstream when rotating, which can generate a large centrifugal force for the oil and gas in the first space, so that the oil and gas can flow smoothly and pass through the annular filter layer 42 smoothly, reducing the flow resistance of the product and extending the life of the product.

[0047] The housing 7 is provided with an air inlet 1, an air outlet 71 and an oil outlet, wherein the air inlet 1 is connected to the first space, and the blow-by gas generated during the operation of the internal combustion engine or the oil-gas mixture to be separated enters the first space through the air inlet 1. Generally, the air inlet 1 is arranged above the axial direction of the filter element assembly 4. The air outlet 71 is connected to the second space and the third space, and the gas rising in the second space and the gas rising in the third space merge and flow out through the air outlet 71. The air outlet 71 is preferably arranged at the top of the housing 7 or near the top. The oil outlet is connected to the third space, and the separated oil flows downward in the third space and flows out through the oil outlet.

[0048] The utility model utilizes the driving component 6 to drive the filter element component 4 to rotate, so that the oil and gas entering the first space enter the second space and the third space in turn under the action of centrifugal force, and the rotating annular filter layer 42 can form an arc path for the oil, thereby extending the filtering path and improving the separation efficiency of the oil. At the same time, under the action of centrifugal force, the passing capacity of the oil and gas can be improved, and the service life can be extended. The oil after the oil and gas separation in the second space enters the third space and is separated again in the third space, thereby improving the defect that the separated gas carries the oil again, which is equivalent to carrying out two oil and gas separations in succession, and effectively improving the oil and gas separation effect.

[0049] In addition to the inner guide plate 411 provided in the first space, an outer guide plate 412 for radial flow guidance can also be provided in the second space, whereby the oil and gas before and after passing through the annular filter layer 42 are both passively guided, that is, they are subjected to centrifugal force, the former helps to pass through the annular filter layer 42, and the latter helps to pass through the oil-throwing hole 431. The inner guide plate 411 and the outer guide plate 412 are both radially distributed, conforming to the direction of the centrifugal force. In addition, the inner guide plate 411 and the outer guide plate 412 can also serve as internal and external supports for the annular filter layer 42, to prevent the deformation of the annular filter layer 42 from affecting the filtering effect.

[0050] Furthermore, it also includes a central shaft 3, an upper end cover 41 and a lower end cover 43. The inner diameter side of the inner guide vane 411 is connected to the central shaft 3 through a sleeve, and is driven to rotate by the inner guide vane 411 to transmit the torque of the central shaft 3. The top and bottom of the inner guide vane 411 are respectively connected to the upper end cover 41 and the lower end cover 43. The upper end cover 41 is provided with or has a first channel on its inner diameter side. The first channel is used to connect the air inlet 1 and the first space, that is, when the inner guide vane 411 is connected and fixed by the upper end cover 41 and the lower end cover 43, it will not affect the air intake. The outer diameter side of the outer guide plate 412 is connected to the inner shell 44, and the top and bottom of the outer guide plate 412 are respectively connected to the upper end cover 41 and the lower end cover 43. The upper end cover 41 is opened or a second channel is arranged on its outer diameter side. The second channel is used to connect the second space and the third space. That is, when the upper end cover 41 and the lower end cover 43 are used to connect and fix the outer guide plate 412, it will not affect the separated gas.

[0051] Combination Figure 5 and Figure 6 As shown, in a further solution, the inner guide plate 411 may include an upper inner guide plate 4111 and a lower inner guide plate 4112 which are axially segmented, and the two may be connected by axial hole plugging to improve stability. In this case, the upper inner guide plate 4111 and the lower inner guide plate 4112 are respectively connected to the upper end cover 41 and the lower end cover 43. Or the inner guide plate 411 is not segmented, in this case, the inner guide plate 411 may be connected only to the upper end cover 41 or only to the lower end cover 43 or to both the upper end cover 41 and the lower end cover 43 (the side connected to the upper end cover 41 or the side connected to the lower end cover 43 is connected in a detachable manner for easy installation).

[0052] Referring to the arrangement of the inner guide plate 411, the outer guide plate 412 may include an upper outer guide plate 4121 and a lower outer guide plate 4122 which are arranged in axial sections, and the two may be connected or not connected. In this case, the upper outer guide plate 4121 and the lower outer guide plate 4122 are respectively connected to the upper end cover 41 and the lower end cover 43. Alternatively, the outer guide plate 412 is not segmented, and in this case, the outer guide plate 412 may be connected only to the upper end cover 41 or only to the lower end cover 43 or to both the upper end cover 41 and the lower end cover 43 (the side connected to the upper end cover 41 or the side connected to the lower end cover 43 is connected in a detachable manner for easy installation).

[0053] When the upper outer guide plate 4121 and the lower outer guide plate 4122 are arranged in sections, the lower outer guide plate 4122 can be spaced between the upper outer guide plates 4121, and the lower outer guide plate 4122 corresponds to the inner shell 44 and is provided with an oil-flinging hole 431 at a position higher than the lower outer guide plate 4122. At this time, the lower outer guide plate 4122 will not cause obstruction to the oil-flinging hole 431, and can cooperate with the upper outer guide plate 4121 to better allow the oil to flow out to the third space through the oil-flinging hole 431.

[0054] Combination Figure 2 , Figure 3 and Figure 8 As shown, an upper bearing assembly 2 may also be included, and the upper bearing assembly 2 is installed in the upper part of the housing 7, corresponding to the position of the air inlet 1. The upper bearing assembly 2 includes a shroud 21 and an upper bearing hole 22 connected to the top of the shroud 21, and an upper bearing 23 for supporting the central axis 3 is installed in the upper bearing hole 22. A through hole 24 connecting the air inlet 1 and the first space is arranged around the upper bearing hole 22 at the top of the shroud 21, and the through hole 24 facilitates the oil and gas to enter the first space from the air inlet 1.

[0055] Combination Figure 2 and Figure 3 As shown, the lower bearing assembly 5 is also included, and the lower bearing assembly 5 is installed in the lower part of the housing 7, corresponding to the position of the oil outlet. The lower bearing assembly 5 includes a lower bearing seat 52 and a lower bearing 51 installed on the lower bearing seat 52, and the lower bearing 51 is used to support the central shaft 3. The separated oil can directly flow downward to the oil outlet through the gap between the inner and outer rings of the lower bearing 51.

[0056] Furthermore, the inner shell 44 may adopt a first conical cylinder structure, the top diameter of which is smaller than the bottom diameter, whereby the oil and gas flowing upward in the second space will be blocked, especially the oil droplets attached to the inner wall of the inner shell 44 can fall directly under the action of gravity, thereby improving the efficiency of oil-liquid separation.

[0057] Furthermore, the outer shell 7 may adopt a second cone cylinder structure, the top diameter of the second cone cylinder structure is smaller than the bottom diameter, thereby, the oil gas flowing upward in the third space will be blocked, especially the oil droplets attached to the inner wall of the outer shell 7 can fall directly under the action of gravity, thereby improving the efficiency of oil separation. In addition, the top diameter of the second cone cylinder structure can be set larger than the bottom diameter of the first cone cylinder, when the oil droplets on the inner wall of the outer shell 7 fall, the possibility of falling on the outer wall of the inner shell 44 is reduced, so that the oil can flow to the oil outlet better.

[0058] like Figure 2 and Figure 3As shown, the inner wall of the second conical cylinder (i.e., the outer shell 7) is provided with an axially extending guide groove 73 and an circumferentially extending step structure 72. The guide groove 73 is used to collect the oil when the filter element assembly 4 throws the oil to the inner wall of the outer shell 7, hindering the oil from flowing circumferentially along the inner wall of the outer shell 7, forcing the oil to move vertically, that is, flowing downward under the action of gravity, reducing the contact between the airflow and the oil impurities, and preventing the separated oil impurities from mixing with the separated airflow for a second time. The step structure 72 is located at the top of the guide groove 73. A part of the oil thrown to the inner wall of the outer shell 7 enters the guide groove 73, and a part flows on the inner wall surface. No matter which part of the oil, when it encounters the step structure 72 upward, it cannot continue to flow upward due to the obstruction of the step structure 72 and is forced to flow downward.

[0059] The drive assembly 6 may include a drive motor (not shown in the figure), which may be a hydraulic motor or an electric motor. The drive motor may be directly connected to the central shaft 3, or connected to the central shaft 3 through a gear drive. Thus, the power source of the drive assembly 6 may be an external drive such as an oil drive, an air flow drive, or a gear transmission drive. In either case, the rotational power of the drive motor is output to the central shaft 3 to drive the entire filter element assembly 4 to rotate at high speed.

[0060] like Figure 2 and Figure 3 As shown, the driving assembly 6 may include an impeller 61, which is sleeved and installed on the central shaft 3. A nozzle 62 is provided on the radial outer side of the impeller 61, and the nozzle 62 sprays air or liquid toward the impeller 61. The sprayed air or liquid drives the impeller 61 to rotate, and the rotation of the impeller 61 drives the central shaft 3 to rotate.

[0061] Furthermore, the impeller 61 is located in the base 63, and the nozzle 62 is used to spray the post-pump oil of the engine. An oil return port 64 is provided at the bottom of the base 63. At this time, the post-pump oil can be sprayed to the impeller 61 through the nozzle 62, thereby driving the impeller 61 to rotate at a high speed. The impeller 61 drives the central shaft 3 and the filter element assembly 4 to rotate at a high speed to achieve efficient separation of the blow-by gas. At the same time, the oil in the blow-by gas is recovered to achieve the recycling of the oil.

[0062] like Figure 4 As shown, a magnet 413 may also be included. The magnet 413 is installed on the upper end cover 41. When the filter element assembly 4 rotates, the magnet 413 can be used to measure the rotation speed of the filter element assembly 4 through the Hall principle.

[0063] The working principle of the utility model is as follows:

[0064] The utility model comprehensively applies the separation principle of the centrifuge and the filter element structure. The blow-by gas rotates through the annular filter layer 42, which prolongs the effective path length of the blow-by gas through the annular filter layer 42, improves the interception probability of the annular filter layer 42, and improves the separation efficiency of the annular filter layer 42; at the same time, the impurities intercepted by the annular filter layer 42 accumulate in the annular filter layer 42, and when accumulated to a certain extent, they will be thrown to the downstream of the annular filter layer 42 under the action of centrifugal force, thereby prolonging the service life of the annular filter layer 42 without affecting the overall filtering efficiency.

[0065] like Figure 2 As shown, the blow-by gas flows in the direction indicated by the arrow, and the blow-by gas passes through the upper bearing assembly 2 and enters the first space from the air inlet 1, and then enters the second space through the annular filter layer 42 in the filter element assembly 4. The high-speed rotating filter element assembly 4 comprehensively utilizes the dispersion effect and inertial centrifugal effect to effectively separate the impurities in the blow-by gas, and the separated clean gas flows downstream through the air outlet 71 of the outer shell 7.

[0066] like Figure 3 As shown, the oil and other impurities separated by the filter element assembly 4 enter the second space under the action of centrifugal force, are thrown to the inner wall of the inner shell 44, and then flow downward to the lower end cover 43. The oil impurities enter the third space from the oil throwing hole 431 of the lower end cover 43 under the action of centrifugal force, are thrown to the inner wall of the outer shell 7, and flow downward to the lower bearing seat 52 under the blocking action of the guide groove 73 and the step structure 72, and then flow through the lower bearing 51 into the base 63 of the drive assembly 6, and return to the crankcase oil pan from the return oil port 64 with the driving oil.

[0067] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An oil-gas separation device, characterized in that: It comprises a housing, a filter element assembly arranged in the housing, and a driving assembly for driving the filter element assembly to rotate, wherein the filter element assembly comprises an inner housing and an annular filter layer arranged in the inner housing; A first space is formed on the inner diameter side of the annular filter layer, a second space is formed between the annular filter layer and the inner shell, and a third space is formed between the inner shell and the outer shell; The first space is connected to the second space through the pores of the annular filter layer, and the second space is connected to the third space through the oil-slinging holes provided on the inner shell; an inner guide plate for radial flow guidance is provided in the first space; The housing is provided with an air inlet, an air outlet and an oil outlet, the air inlet is connected to the first space, the air outlet is connected to the second space and the third space, and the oil outlet is connected to the third space.

2. The oil-gas separation device according to claim 1, characterized in that: The second space is also provided with outer guide vanes for radial flow guidance, and the inner guide vanes and the outer guide vanes are both distributed radially.

3. The oil-gas separation device according to claim 2, characterized in that: It also includes a central axis, an upper end cover and a lower end cover, the inner diameter side of the inner guide plate is connected to the central axis, the top and bottom of the inner guide plate are respectively connected to the upper end cover and the lower end cover, the upper end cover is provided with a first channel, or the inner diameter side of the upper end cover is provided with a first channel, the first channel connects the air inlet and the first space; the outer diameter side of the outer guide plate is connected to the inner shell, the top and bottom of the outer guide plate are respectively connected to the upper end cover and the lower end cover, the upper end cover is provided with a second channel, or the outer diameter side of the upper end cover is provided with a second channel, the second channel connects the second space and the third space.

4. The oil-gas separation device according to claim 3, characterized in that: The inner guide plate comprises an upper inner guide plate and a lower inner guide plate which are axially segmented, and the upper inner guide plate and the lower inner guide plate are respectively connected to the upper end cover and the lower end cover; or the inner guide plate is not segmented, and the inner guide plate is connected to the upper end cover and / or the lower end cover.

5. The oil-gas separation device according to claim 3, characterized in that: The outer guide plate includes an upper outer guide plate and a lower outer guide plate that are axially segmented, and the upper outer guide plate and the lower outer guide plate are respectively connected to the upper end cover and the lower end cover; or the outer guide plate is not segmented, and the outer guide plate is connected to the upper end cover and / or the lower end cover.

6. The oil-gas separation device according to claim 5, characterized in that: The lower outer guide plates are spaced between the upper outer guide plates, and the lower outer guide plates correspond to the inner shell and are provided with the oil-slinging holes at a position higher than the lower outer guide plates.

7. The oil-gas separation device according to claim 3, characterized in that: It also includes an upper bearing assembly, which is installed in the upper inner part of the shell. The upper bearing assembly includes a deflector and an upper bearing hole connected to the top of the deflector, and the upper bearing hole is installed with an upper bearing for supporting the central axis. The top of the deflector is surrounded by the upper bearing hole and is provided with a through hole connecting the air inlet and the first space.

8. The oil-gas separation device according to claim 3, characterized in that: It also includes a lower bearing assembly, which is installed in the lower part of the shell. The lower bearing assembly includes a lower bearing seat and a lower bearing installed on the lower bearing seat, and the lower bearing is used to support the central shaft.

9. The oil-gas separation device according to claim 1, characterized in that: The inner shell adopts a first conical cylinder structure, and the top diameter of the first conical cylinder structure is smaller than the bottom diameter.

10. The oil-gas separation device according to claim 9, characterized in that: The shell adopts a second cone cylinder structure, the top diameter of the second cone cylinder structure is smaller than the bottom diameter, and the top diameter of the second cone cylinder structure is larger than the bottom diameter of the first cone cylinder.

11. The oil-gas separation device according to claim 10, characterized in that: The inner wall of the second conical cylinder is provided with an axially extending guide groove and a circumferentially extending step structure, wherein the step structure is located at the top end of the guide groove and is used to prevent the oil from flowing upward.

12. The oil-gas separation device according to claim 3, characterized in that: The driving assembly includes a driving motor, and the driving motor is directly connected to the central shaft or connected to the central shaft through a gear drive.

13. The oil-gas separation device according to claim 3, characterized in that: The driving assembly includes an impeller, which is sleeved and mounted on the central shaft. A nozzle is arranged on the radial outer side of the impeller, and the nozzle sprays air flow or liquid flow toward the impeller. The rotation of the impeller drives the central shaft to rotate.

14. The oil-gas separation device according to claim 13, characterized in that: The impeller is located in the base, the nozzle is used for spraying the post-pump oil of the engine, and the bottom of the base is provided with an oil return port.

15. The oil-gas separation device according to claim 3, characterized in that: It also includes a magnet, which is installed on the upper end cover and is used to measure the rotation speed of the filter element assembly through the Hall principle.

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