CN108457720B

CN108457720B - Oil-gas separator

Info

Publication number: CN108457720B
Application number: CN201810055400.0A
Authority: CN
Inventors: 徐佩东
Original assignee: Borgward Automotive China Co Ltd
Current assignee: Borgward Automotive China Co Ltd
Priority date: 2018-01-19
Filing date: 2018-01-19
Publication date: 2020-09-18
Anticipated expiration: 2038-01-19
Also published as: CN108457720A

Abstract

The present invention provides an oil-gas separator, comprising: the separation device comprises a shell, a plurality of separation cavities which are communicated in sequence are arranged in the shell, an oil inlet is formed in the first separation cavity which is communicated in sequence, an oil outlet is formed in the last separation cavity, an exchange port is formed between every two adjacent separation cavities, and the two adjacent separation cavities are communicated through the exchange port; the separation channels are arranged in the separation cavities in a one-to-one correspondence mode, two separation channels in two adjacent separation cavities are communicated with each other, and the separation cavities are sequentially arranged in the shell along the flowing direction perpendicular to the separation channels; and the plurality of cyclone devices are arranged in the separation channels in a one-to-one correspondence mode, and each cyclone device can rotate relative to the shell. Through the technical scheme provided by the invention, the technical problems of low separation efficiency and large occupied space of the labyrinth type oil-gas separator in the prior art can be solved.

Description

Oil-gas separator

Technical Field

The invention relates to the technical field of automobile engines, in particular to an oil-gas separator.

Background

At present, when an automobile engine works, part of gas in a combustion chamber can flow into a crankcase along with the reciprocating motion of a piston, and the gas generally enters the combustion chamber again through a crankcase ventilation system to participate in combustion and exhaust. Along with the development of engine technology, the particle diameter of the engine oil in the crankcase is greatly reduced compared with the prior art, and the crankcase gas is easier to carry a large amount of engine oil particles to be discharged out of the crankcase, so that the phenomenon of high engine oil consumption is caused.

The labyrinth type oil-gas separator in the prior art is widely used due to low cost and easy manufacture. The labyrinth type oil-gas separator has a simple structure at present, but generally needs a larger space position so as to enable airflow to pass through a longer stroke and fully impact with a wall surface, and thus a better oil-gas separation effect can be achieved. With the development of miniaturization and integration of the engine, a large space is not reserved in the engine for placing the labyrinth type oil-gas separator, so that the separation efficiency of the labyrinth type oil-gas separator is reduced.

Disclosure of Invention

The invention provides an oil-gas separator, which aims to solve the problems that a labyrinth type oil-gas separator in the prior art is low in separation efficiency and large in occupied space.

The invention provides an oil-gas separator, which comprises: the separation device comprises a shell, a plurality of separation cavities which are communicated in sequence are arranged in the shell, an oil inlet is formed in the first separation cavity which is communicated in sequence, an oil outlet is formed in the last separation cavity, an exchange port is formed between every two adjacent separation cavities, and the two adjacent separation cavities are communicated through the exchange port; the separation channels are arranged in the separation cavities in a one-to-one correspondence mode, two separation channels in two adjacent separation cavities are communicated with each other, and the separation cavities are sequentially arranged in the shell along the flowing direction perpendicular to the separation channels; and the plurality of cyclone devices are arranged in the separation channels in a one-to-one correspondence mode, and each cyclone device can rotate relative to the shell.

Further, the oil-gas separator further includes: the baffle is arranged in the shell and located between the two adjacent separation cavities, the baffle is used for separating the two separation cavities, and the exchange port is formed in the baffle.

Further, each swirling device includes: the rotating shafts are rotatably arranged in the separation channels, the rotating shafts are arranged on the partition plates, and the two rotating shafts in the two adjacent separation cavities are mutually connected; the fan blades are arranged on the rotating shaft.

Furthermore, a through hole is formed in the partition plate, a bearing is arranged in the through hole, and the rotating shaft penetrates through the bearing.

Further, each separation channel includes a plurality of baffle segments in serial communication.

Furthermore, a plurality of bending plates are arranged in each separation channel, and the bending plates are matched with the inner wall of the separation cavity to form a plurality of baffling sections.

Furthermore, the plurality of bending plates in each separation channel are symmetrically arranged at the center of the separation cavity.

Furthermore, the separation channel in the first separation cavity comprises a first refraction section, a second refraction section, a third refraction section and a fourth refraction section, one end of the first refraction section is communicated with the oil gas port, the other end of the first refraction section is communicated with the second refraction section, one end of the fourth refraction section is communicated with the exchange port, the other end of the fourth refraction section is communicated with the third refraction section, an included angle is formed between the second refraction section and the first refraction section, the second refraction section bends towards the fourth refraction section, an included angle is formed between the third refraction section and the fourth refraction section, the third refraction section bends towards the first refraction section, an air inlet of the third refraction section and an air outlet of the second refraction section are arranged in a staggered mode, and fan blades are arranged between the third refraction section and the second refraction section.

Furthermore, the fan blade has convex surface and the concave surface of relative setting, and the concave surface sets up towards the air outlet side of second baffling section.

Furthermore, the separation channels and the cyclone devices in the two adjacent separation cavities are symmetrically arranged in the shell by taking the partition plate as a symmetric center.

By applying the technical scheme of the invention, the oil-gas separator comprises: the cyclone separator comprises a shell, a plurality of separation channels and a plurality of cyclone devices. Wherein, have a plurality of separation chambeies of intercommunication in order in the casing, and be provided with the oil feed gas mouth on the first separation chamber of intercommunication in order, be provided with the oil gas mouth on the last separation chamber, be provided with the exchange mouth between two adjacent separation chambeies, two adjacent separation chambeies pass through the exchange mouth intercommunication. A plurality of separation passageways set up in each separation intracavity one-to-one, and two separation passageways in two adjacent separation intracavity communicate each other, and a plurality of separation chambeies set up in order in the casing along perpendicular to separation passageway's circulation direction. The plurality of cyclone devices are arranged in the separation channels in a one-to-one correspondence manner, and each cyclone device can rotate relative to the shell.

By adopting the oil-gas separator provided by the invention, after the oil-gas mixture enters the device from the oil-gas port, the oil-gas mixture sequentially passes through the plurality of separation channels of the plurality of separation cavities and the cyclone device, and the oil-gas mixture collides with the inner wall of the separation channel to realize primary separation when passing through the separation channels. And then, the oil-gas mixture enters the cyclone device for separation, on one hand, the cyclone device increases the stroke of the oil-gas mixture, and on the other hand, the engine oil particles are separated under the action of centrifugal force. And then, the oil-gas mixture from the cyclone device continues to enter the separation channel for separation, so that the separation process in a separation cavity is completed. Because there are a plurality of separation chambeies in this device, and a plurality of separation chambeies set up in the casing in order along perpendicular to separation channel's circulation direction, therefore will repeat above-mentioned separation process many times to can reduce the occupation of land space, make the device compacter, so can improve separation efficiency in limited space, and then solved labyrinth oil and gas separator among the prior art separation efficiency low, account for the big problem in space.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of an oil-gas separator provided by the invention;

FIG. 2 shows a front view of an oil separator provided by the present invention;

FIG. 3 shows a left side view of an oil separator provided by the present invention;

fig. 4 shows a rear view of an oil separator provided by the present invention.

Wherein the figures include the following reference numerals:

10. a housing; 11a, an oil inlet; 11b, an oil outlet; 12. an exchange port; 20. a separation channel; 21. bending the plate; 22. an oil return hole; 30. a fan blade; 40. and a bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides an oil-gas separator. The oil-gas separator includes: a housing 10, a plurality of separation channels 20 and a plurality of swirling means. Wherein, have a plurality of separation chambers of intercommunication in order in the casing 10, and be provided with oil feed gas port 11a on the first separation chamber of intercommunication in order, be provided with oil outlet port 11b on the last separation chamber, be provided with exchange port 12 between two adjacent separation chambers, two adjacent separation chambers pass through exchange port 12 intercommunication. The plurality of separation passages 20 are disposed in the respective separation chambers in a one-to-one correspondence, two separation passages 20 in adjacent two separation chambers are communicated with each other, and the plurality of separation chambers are sequentially disposed in the housing 10 in a flow direction perpendicular to the separation passages 20. A plurality of cyclone devices are disposed in the respective separation passages 20 in a one-to-one correspondence, each of which is rotatable relative to the housing 10.

Adopt the oil and gas separator in this embodiment, the oil-gas mixture will get into the device from the oil feed gas port 11a of first separation chamber, and subsequently, the oil-gas mixture of entering device will move along separation channel 20 in the separation chamber, when this oil-gas mixture is through a plurality of baffling sections that communicate in order, the machine oil granule in the oil-gas mixture will be followed this gas mixture and separated out, and this oil-gas mixture obtains initial segregation this moment. Subsequently, the oil-gas mixture of initial separation obtains further separation under swirl device's effect, and swirl device can increase the stroke of the oil-gas mixture after initial separation on the one hand for it is at limited separation channel 20 internal repetitive motion, thereby strengthens the collision with the separation channel 20 wall and in order to improve separation efficiency, and on the other hand, because swirl device's rotation, makes the machine oil granule in this oil-gas mixture can be separated out under the effect of centrifugal force, has further strengthened the separation efficiency of device. Then, the oil-gas mixture will continue to pass through the separation channel 20 for separation after coming out of the cyclone device, so as to complete the separation of the oil-gas mixture in the first separation chamber.

After the separation of the oil-gas mixture in the first separation chamber is finished, the oil-gas mixture enters the next separation chamber connected with the exchange port 12 from the exchange port for separation, and the oil-gas separation process is repeated. By analogy, when the oil-gas mixture gradually enters the next separation cavity connected with the first separation cavity from the first separation cavity to be separated, the engine oil particles in the oil-gas mixture are continuously separated, so that the separation efficiency of the device is continuously improved. Theoretically, the more separation chambers are provided, the higher the separation efficiency of the oil separator. In practice, however, the worker has found that the oil content in the oil-gas mixture is already substantially minimal when the oil particle diameter is < 0.5. mu.m, so that it is not necessary to provide too many separating chambers. Preferably, in order to improve the oil-gas separation device and reduce the occupied space of the device, the oil-gas separator in the embodiment is provided with two connected separation cavities.

Wherein, when the plurality of separation cavities are communicated in sequence, the separation cavities can be arranged in sequence along the flow direction of the separation channel; or can be arranged along the flow direction of the vertical separation channel in sequence, taking the figure 1 as an example; the plurality of separation cavities can be communicated in sequence along the upper side, the lower side or the left side and the right side of the first separation cavity; a plurality of separation chambers may also be provided in series along the front and rear sides of the first separation chamber. In the present embodiment, it is preferable that a plurality of separation chambers are sequentially disposed in the housing 10 in a flow direction perpendicular to the separation passage 20. That is, the remaining separation chambers are sequentially disposed along the rear side of the first separation chamber. So as to reduce the occupied space of the device in the length direction or the height direction as much as possible and make the structure more compact.

In order to avoid mixing of the unseparated oil-gas mixture with the separated oil-gas mixture, the separation processes of different separation chambers need to be not interfered with each other. Preferably, the oil separator in this embodiment further includes a partition. The partition plate is arranged in the shell 10 and located between two adjacent separation cavities, so that the partition plate can effectively separate the two adjacent separation cavities, and the mixing of oil-gas mixed gas with different separation degrees is avoided. Meanwhile, in order to ensure that the oil-gas mixture can sequentially pass through the adjacent separation cavities, the exchange port 12 can be arranged on the partition plate, so that the oil-gas mixture can smoothly enter the next adjacent separation cavity to be continuously separated after being separated by one separation cavity.

As shown in fig. 2, each swirling device includes a rotating shaft and a fan blade 30. Wherein, the rotating shaft is rotatably arranged in the separation channel 20, and the fan blade 30 is arranged on the rotating shaft. The rotational flow device in this embodiment rotates the rotating shaft under the action of the oil-gas mixture, and further drives the fan blades 30 on the rotating shaft to start moving, so that the rotational flow device starts to work. In this embodiment, the rotational flow device does not need to be provided with a motor, and the fan blades 30 are pushed to rotate by the flow of the mixed gas, so that the structure of the device is reduced, and the structure is simpler.

In order to make the structural arrangement of the oil separator more reasonable, it is preferable that the rotation shaft is provided on the partition plate. Because the airflow direction in two adjacent separation cavities is the same, two rotating shafts in two adjacent separation cavities can be preferably connected with each other, so that when the cyclone device in the first separation cavity moves, the cyclone devices in other separation cavities are driven to work simultaneously, and the separation efficiency of the device is improved. Meanwhile, the central lines of the two rotating shafts in two adjacent separating cavities can be arranged to be parallel to each other, so that the rotating shafts of different separating cavities are connected together. The oil-gas separator in the embodiment has only two separation cavities, and in order to increase the compactness of the device, the rotating shafts of different separation cavities in the embodiment are preferably arranged on the same axis, so that the rotating shafts can be conveniently connected and the separation efficiency of the device can be improved.

Correspondingly, a through hole is arranged on the partition plate to install the rotating shaft. In order to reduce the friction damage of the direct connection between the rotating shaft and the partition board, a bearing 40 is preferably further disposed in the through hole, the bearing 40 is fixedly disposed in the through hole, and the rotating shaft is disposed on the bearing 40 in a penetrating manner, so as to achieve the connection between the rotating shaft and the partition board.

Specifically, each separation channel 20 includes a plurality of baffle segments in serial communication. After the oil-gas mixture enters the oil-gas separator, along with the movement of the oil-gas mixture along the plurality of baffling sections, the oil-gas mixture continuously collides with the baffling sections and the inner wall of the separation cavity, and engine oil particles are continuously separated from the oil-gas mixture in the collision process, so that the oil-gas separation effect is achieved.

Specifically, a plurality of bending plates 21 are arranged in each separation channel 20, and the bending plates 21 are matched with the inner wall of the separation cavity to form a plurality of baffling sections. Adopt such setting, can make the oil-gas mixture constantly collide with the board 21 and the separation intracavity wall of bending, will constantly make the machine oil granule separate out from this oil-gas mixture in the collision process to reach better oil-gas separation's effect.

Specifically, the plurality of bending plates 21 in each separation channel 20 are symmetrically arranged at the center of the separation cavity. The cyclone device is arranged at the center of the separation cavity in the embodiment, the bending plates 21 are arranged around the cyclone device, and the bending plates 21 are symmetrically arranged at the center of the separation cavity at the position, so that the compact structure of the device is increased, the occupied space of the device is reduced, and the reasonable space layout is realized.

By adopting the oil-gas separator in the embodiment, after the oil-gas mixture enters the separator through the oil inlet 11a, the oil-gas mixture firstly enters the baffling section of the separation channel 20, and along with the collision of the oil-gas mixture with the bending plate 21 and the inner wall of the separation cavity, the engine oil particles are continuously separated, and the oil-gas mixture is also subjected to preliminary separation. Subsequently, the oil-gas mixture will enter the cyclone device, which enhances the separation efficiency of the separation chamber due to the effect of the cyclone device. Then, the oil-gas mixture coming out of the cyclone device enters a deflection section which is symmetrical to the deflection starting section for separation, so that the separation efficiency of the separation cavity is further improved. The oil-gas mixture from the deflection section will then enter the next adjacent separation chamber through the exchange port 12 for separation, and the separation process in different separation chambers is consistent. Finally, the oil-gas mixture separated by the two separation chambers is fully separated, and the separated clean gas is discharged from the oil outlet 11b of the latter separation chamber, so that the complete separation process of the oil-gas separator in the embodiment is realized.

As shown in fig. 1 and fig. 2, in detail, the separation passage 20 in the first separation chamber includes a first baffling section, a second baffling section, a third baffling section and a fourth baffling section, one end of the first baffling section is communicated with the oil inlet 11a, the other end of the first baffling section is communicated with the second baffling section, one end of the fourth baffling section is communicated with the exchange port 12, the other end of the fourth baffling section is communicated with the third baffling section, the second baffling section and the first baffling section have an included angle, the second baffling section is bent towards the fourth baffling section, an included angle is formed between the third baffling section and the fourth baffling section, and the third bending section is bent towards the first bending section, the air inlet of the third bending section and the air outlet of the second bending section are arranged in a staggered way, a labyrinth structure is formed by the first baffling section, the second baffling section, the third baffling section and the fourth baffling section, and the fan blade 30 is arranged between the third baffling section and the second baffling section. Accordingly, separation channels in other separation chambers may also be provided in this configuration.

After the oil-gas mixture passes through the first baffling section and the second baffling section in sequence by the oil inlet 11a, the oil-gas mixture is separated by entering the cyclone device, the cyclone device can effectively increase the separation efficiency of the oil-gas mixture, and after the separated oil-gas mixture comes out of the cyclone device, the oil-gas mixture enters the third baffling section and the fourth baffling section in sequence to be separated, and finally enters the next separation cavity through the exchange port 12.

Specifically, the fan blade 30 has a convex surface and a concave surface which are oppositely arranged, and the concave surface is arranged towards the air outlet side of the second baffling section. Through the arrangement, the oil-gas mixture coming out from the second baffling section can be concentrated on the concave surface of the fan blade 30, and when the oil-gas mixture entering the rotational flow device is increased, the force applied to the concave surface is larger, so that the fan blade 30 is pushed to rotate around the rotating shaft. Along with the oil-gas mixture continuously enters the cyclone device from the second baffling section, the fan blades 30 can continuously rotate. When the fan blades 30 rotate, on one hand, the stroke of the mixed gas is increased, and on the other hand, due to the effect of centrifugal force, more engine oil particles are separated from the oil-gas mixed gas, so that the separation efficiency of the device is improved.

As shown in fig. 2 and 4, in order to make the structural layout of the device more reasonable, the separation passages 20 and the swirling devices in two adjacent separation chambers are preferably symmetrically arranged in the housing 10 with the partition plate as the center of symmetry.

In the present embodiment, the oil separator further includes an oil return hole 22, and the oil return hole 22 is provided in each of the separation passages 20 so that the oil return hole 22 collects the separated oil. The present embodiment includes a plurality of oil return holes 22, and the oil return holes 22 are respectively disposed on the bending plate 21 and the housing 10.

By adopting the oil-gas separator in the embodiment, after the oil-gas mixture enters the first separation cavity from the oil inlet 11a, the oil-gas mixture can sequentially pass through the first baffling section, the second baffling section, the cyclone device, the third baffling section, the fourth baffling section and the exchange port 12, then the oil-gas mixture enters the second separation cavity adjacent to the first separation cavity, the separation process is repeated in the second separation cavity, finally, the separated clean gas is discharged from the oil outlet 11b in the second separation cavity, and the separated engine oil returns to the crankcase through the oil return hole 22. In the embodiment, the oil-gas separator doubles the air flow movement stroke of the oil-gas mixture, so that the separation efficiency is improved, and meanwhile, the device is reasonable in structural layout and reduces the occupied space of the device. And the oil-gas separator has simple structure and convenient manufacture.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil and gas separator, characterized in that the oil and gas separator comprises:

the oil separator comprises a shell (10), wherein a plurality of separation cavities which are communicated in sequence are arranged in the shell (10), an oil inlet (11a) is arranged on the first separation cavity which is communicated in sequence, an oil outlet (11b) is arranged on the last separation cavity, an exchange port (12) is arranged between every two adjacent separation cavities, and the two adjacent separation cavities are communicated through the exchange port (12);

a plurality of separation channels (20), wherein the separation channels (20) and the separation cavities are arranged in a one-to-one correspondence manner, each separation channel (20) is arranged in the corresponding separation cavity, two separation channels (20) in two adjacent separation cavities are communicated with each other, and the separation cavities are arranged in the shell (10) in a stacking manner along a flow direction perpendicular to the separation channels (20);

a plurality of cyclone devices arranged in the separation passages (20) in a one-to-one correspondence, each of the cyclone devices being rotatable relative to the housing (10);

the partition plate is arranged in the shell (10) and positioned between two adjacent separation cavities, the partition plate is used for separating the two separation cavities, and the exchange port (12) is arranged on the partition plate;

each of the swirling devices includes:

the rotating shafts are rotatably arranged in the separation channel (20), the rotating shafts are arranged on the partition plates, and the two rotating shafts in the two adjacent separation cavities are mutually connected;

and the fan blade (30) is arranged on the rotating shaft.

2. Oil separator as in claim 1, characterized in that the partition is provided with a through hole, a bearing (40) is arranged in the through hole, and the rotating shaft is arranged on the bearing (40) in a penetrating manner.

3. Oil separator according to claim 1, characterized in that each separation channel (20) comprises a plurality of baffled segments communicating in series.

4. Oil separator according to claim 3, characterized in that inside each separation channel (20) there are provided a plurality of bent plates (21), the plurality of bent plates (21) cooperating with the inner wall of the separation chamber to form a plurality of said baffle segments.

5. Oil separator according to claim 4, characterized in that the plurality of bent plates (21) in each separation channel (20) are arranged symmetrically with respect to the center of the separation chamber in which they are located.

6. Oil and gas separator according to claim 5, characterized in that the separation channel (20) in the first separation chamber comprises a first deflection section, a second deflection section, a third deflection section and a fourth deflection section, one end of the first deflection section is communicated with the oil and gas port (11), the other end of the first deflection section is communicated with the second deflection section, one end of the fourth deflection section is communicated with the exchange port (12), the other end of the fourth deflection section is communicated with the third deflection section, the second deflection section has an angle with the first deflection section, the second deflection section is bent towards the fourth deflection section, the third deflection section has an angle with the fourth deflection section, the third deflection section is bent towards the first deflection section, the air inlet of the third deflection section is staggered with the air outlet of the second deflection section, the fan blade (30) is arranged between the third baffling section and the second baffling section.

7. Oil and gas separator according to claim 6, wherein the fan blade (30) has a convex surface and a concave surface which are oppositely arranged, and the concave surface is arranged towards the air outlet side of the second baffling section.

8. Oil separator according to any of claims 1 to 7, characterized in that the separation channels (20) and the swirling means in two adjacent separation chambers are symmetrically arranged in the housing (10) with the partition as the center of symmetry.