CN118110743A - Retarder oil-gas separation device - Google Patents

Abstract

The application relates to a retarder oil-gas separation device, which comprises a shell, a ball float valve assembly, a first separation component and a second separation component, wherein the ball float valve assembly is configured to discharge gas out of a working cavity under the action of oil liquid; the first separation assembly comprises a first body and a separation piece; the second separation assembly comprises a second body, and a separation channel is arranged in the second body. Oil gas can flow through first separation subassembly and second separation subassembly in proper order, through this setting, can carry out the two-stage separation to oil gas, first stage separation can be preliminary intercept the partial oil in the oil gas, then oil gas then flows to second separation subassembly and carries out the second level separation, the second level separation can further separate remaining oil in the oil gas, the oil after the separation can flow back to the working chamber, can avoid oil to be taken out the retarder as far as possible from this, and then can reduce the loss of working intracavity fluid, guarantee the working property of retarder, make the retarder can normal operating in the guarantee scope.

Description

Retarder oil-gas separation device

Technical Field

The application relates to the technical field of retarders, in particular to an oil-gas separation device of a retarder.

Background

The hydrodynamic retarder is an intelligent product integrating machine, electricity, gas and liquid as an auxiliary braking device of a vehicle. In the working process of the retarder, working medium (oil) of the retarder is pressed into the working cavity through high-pressure gas, and the damping effect of the flowing oil is utilized to generate reverse dragging braking force opposite to the forward driving force, so that the aim of decelerating the whole vehicle is fulfilled.

When the oil enters the working cavity, the gas occupying the space of the working cavity is discharged to the atmosphere from the exhaust hole of the working cavity, however, a small amount of oil is mixed in the gas discharged outwards due to incomplete oil-gas separation, that is, the gas brings a small amount of oil out of the retarder. In the working phase of the retarder, the process that the oil is brought out of the retarder is repeated, and more oil is discharged out of the retarder as time is accumulated. The discharged oil-containing mist is accumulated outside the retarder shell, which can cause oil leakage false images and bring influence to the overhaul of the retarder; in addition, the original oil is lost after the oil is carried out of the retarder, and the working performance of the retarder can be affected.

Therefore, how to efficiently separate oil and gas in the retarder and reduce the loss of original oil is a problem which needs to be solved by technicians.

Disclosure of Invention

Based on the problems, the oil is lost because more oil is discharged in the working process of the retarder, and the oil-gas separation device of the retarder is provided.

The application provides a retarder oil-gas separation device which comprises a shell, a float valve assembly, a first separation component and a second separation component, wherein the shell comprises a working cavity; the first separation component is arranged in the shell, and comprises a first body and a separation piece, wherein the first body is connected with the ball float valve assembly and is communicated with the working cavity, and the separation piece is arranged on the periphery of the first body; the second separation assembly is arranged in the shell and comprises a second body, the second body is positioned on one side of the first body away from the ball float valve assembly, a separation channel is arranged in the second body, and the separation channel is communicated with the separation piece and the external space; the separation piece is used for carrying out primary separation on oil gas in the first body so that the separated oil can flow back to the working cavity, and the separation channel is used for carrying out secondary separation on the oil gas passing through the separation piece so that the separated oil can flow back to the working cavity and the separated gas can flow to the external space.

In one embodiment, the first body includes a supporting portion, a top cover and a bottom cover, the supporting portion and the separating member are connected between the top cover and the bottom cover, a cavity for oil gas to flow is enclosed between the supporting portion, the top cover and the bottom cover, the supporting portion is nested in the separating member, so that oil separated by the separating member can be attached to the supporting portion, and the bottom cover is provided with a first air inlet communicated with the working cavity and the cavity.

In one embodiment, a receiving cavity extending in the first direction is provided in a side of the second body adjacent to the first body, the first body is at least partially received in the receiving cavity, and the second body includes a second air inlet in communication with the receiving cavity to enable the flow of the oil and gas passing through the separator to the second air inlet through the receiving cavity.

In one embodiment, the second body further comprises an air outlet communicated with the external space, the separation channel further comprises an air inlet channel, a communication cavity and a flow guiding channel, the air inlet channel is communicated with the second air inlet, the communication cavity is used for communicating the air inlet channel and the flow guiding channel, one end, away from the communication cavity, of the flow guiding channel is communicated with the air outlet, and the flow guiding channel is used for guiding separated oil and gas.

In one embodiment, the air inlet channel extends along a first direction, and in the first direction, one end of the air guide channel, which is communicated with the air outlet, is closer to the first body than one end of the air guide channel, which is communicated with the communication cavity.

In one embodiment, the second separation assembly further comprises an oil return member, the oil return member is sleeved on the periphery of the second body, an oil return groove is formed between the oil return member and the second body, the second body further comprises an oil return port communicated with the accommodating cavity, and the air outlet is communicated with the oil return port through the oil return groove, so that oil separated by the separation channel can flow back to the accommodating cavity through the oil return groove and the oil return port.

In one embodiment, a first included angle is formed between the inner wall of the oil return piece and the outer wall of the second body, and the first included angle ranges from 10 degrees to 20 degrees.

In one embodiment, a second included angle is formed between the inner wall of the oil return port, which is far away from the air outlet, and the inner wall of the first body, and the second included angle ranges from 40 degrees to 50 degrees.

In one embodiment, the second separation assembly further comprises a first filter element disposed in the oil return port and movably connected to the second body, the first filter element being configured to swing toward a side proximate the receiving cavity.

In one embodiment, the second separation assembly further comprises a second filter element connected between the second body and the oil return element, the second filter element being further away from the oil return port relative to the air outlet in the first direction.

Among the above-mentioned retarder oil gas separator, oil gas can flow through first separation subassembly and second separation subassembly in proper order, through this setting, can carry out the two-stage separation to oil gas, first stage separation can be preliminary intercept the partial oil in the oil gas, then oil gas then flows to second separation subassembly and carries out the second level separation, the second level separation can further separate remaining oil in the oil gas, the oil after the separation can flow back to the working chamber, can avoid fluid by taking out the retarder from this as far as possible, and then can reduce the loss of working intracavity fluid, guarantee the working property of retarder, make the retarder can normal operating in the guarantee scope.

Drawings

Fig. 1 is a schematic diagram of a retarder oil-gas separator according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a float valve assembly according to an embodiment of the present application.

Fig. 3 is a schematic view of a first separation assembly according to an embodiment of the application.

FIG. 4 is a schematic diagram of a second separation assembly according to an embodiment of the application.

FIG. 5 is a cross-sectional view of a communication chamber and a flow directing chamber in an embodiment of the present application.

Fig. 6 is an enlarged view of C in fig. 4.

Wherein, the reference numerals are as follows: the device comprises a shell 1, a working cavity 11, a communication port 12, a ball float assembly 2, an upper cover 21, a floating ball 22, a ball cage 23, an oil seal 24, a first air outlet 25, a first separation assembly 3, a first body 31, a supporting part 311, a top cover 312, a bottom cover 313, a cavity 314, a first air inlet 315, a separation member 32, a second separation assembly 4, a second body 41, a containing cavity 411, a second air inlet 412, a second air outlet 413, an oil return port 414, an air inlet channel 42, a communication cavity 43, a guide channel 44, an oil return member 45, an oil return groove 46, a first filter 47 and a second filter 48.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

The embodiment of the application provides a retarder oil-gas separation device which can keep oil in an oil-gas mixing medium discharged out of a retarder in the retarder, and gas is discharged out of the retarder, so that the false appearance of oil leakage is avoided, and the loss of oil in the retarder is reduced.

Referring to fig. 1, the retarder oil-gas separation device includes a housing 1, a float valve assembly 2, a first separation assembly 3, and a second separation assembly 4. The housing 1 serves as a housing of the entire retarder for providing a supporting force and an installation position for the ball float valve assembly 2, the first separating member 3 and the second separating member 4, while also being able to protect its internal components from damage. The floating ball valve assembly 2, the first separation component 3 and the second separation component 4 are arranged in the shell 1 along the first direction, a working cavity 11 is arranged in the shell 1, the floating ball valve assembly 2 is arranged in the working cavity 11, and the floating ball 22 valve is used for discharging gas and sealing oil in the working cavity 11; the first separation assembly 3 is communicated with the working cavity 11, and the first separation assembly 3 is used for carrying out primary separation on oil gas so that the separated oil can flow back to the working cavity 11; the second separation assembly 4 is communicated with the first separation assembly 3, and the second separation assembly 4 is used for carrying out secondary separation on oil gas so as to enable the separated oil to flow back into the working cavity 11 through the first separation assembly 3.

In the embodiment of the present disclosure, the first direction is an up-down direction. Specifically, the ball float assembly 2 is in sealing connection with the shell 1, the first separation component 3 is arranged above the ball float assembly 2 and is in sealing connection with the shell 1, and the second separation component 4 is arranged above the first separation component 3 and is in sealing and fixed connection with the shell 1.

Referring to fig. 2, the ball float assembly 2 includes an upper cover 21, a float 22, a ball cage 23, and an oil seal 24. The periphery of the upper cover 21 is provided with a sealing element, and the sealing connection between the float valve assembly 2 and the shell 1 is realized through the sealing element. The upper cover 21 is sleeved on the periphery of the ball cage 23, the floating ball 22 is arranged in a space formed by the upper cover 21 and the ball cage 23 and can float up and down in the space under the action of oil, the upper cover 21 is provided with a first air outlet 25, the first air outlet 25 is communicated with the working cavity 11, and the oil seal 24 is arranged at the first air outlet 25. The shell 1 is provided with a communication port 12, the communication port 12 is connected with a retarder oil storage cavity, the communication port 12 is communicated with the working cavity 11, and oil in the oil storage cavity can enter the working cavity 11 through the communication port 12. When the retarder works, the oil level in the working cavity 11 starts to rise and finally reaches the lower part of the floating ball valve assembly 2, air in the working cavity 11 is discharged from the first air outlet 25, and meanwhile, the floating ball 22 is floated by oil, so that the floating ball 22 and the oil seal 24 are tightly attached to seal the working cavity 11; when the retarder stops working, the oil level in the working cavity 11 is reduced, the floating ball 22 is dropped, the working cavity 11 is communicated with the atmosphere, gas returns to the working cavity 11 again, and oil in the working cavity 11 returns to the retarder oil storage cavity.

Referring to fig. 3, the first separation assembly 3 includes a first body 31 and a separation member 32. The first body 31 is arranged above the upper cover 21, the first body 31 is cylindrical, and the inside of the first body 31 is hollow; the one end that upper cover 21 was kept away from to first body 31 sets up for closing, and the one end that is close to upper cover 21 sets up for the opening, and first body 31 and first gas outlet 25 intercommunication, under the effect of fluid, the gas in the working chamber 11 can enter into in the first body 31 through first gas outlet 25. The separating piece 32 is arranged on the periphery of the first body 31, gas can diffuse towards the periphery after entering the first body 31, at this time, the separating piece 32 can carry out primary separation on oil gas in the first body 31, particularly the separating piece 32 can allow the gas to pass through, oil is intercepted on the inner side of the separating piece 32, and the intercepted high-temperature oil meets the low-temperature first body 31 and then can be condensed on the inner wall of the first body 31.

Specifically, the first body 31 includes a supporting portion 311, a top cover 312, and a bottom cover 313. The bottom cover 313 is provided peripherally with a sealing member by means of which a sealing connection of the first separation assembly 3 with the housing 1 is achieved. The supporting portion 311 is disposed to extend in the first direction, and the supporting portion 311 is connected between the top cover 312 and the bottom cover 313, and preferably, the top cover 312 is integrally formed with the supporting portion 311. A cavity 314 is defined between the support portion 311, the top cover 312 and the bottom cover 313, and the cavity 314 is used for oil and gas flow. The bottom cover 313 is provided with a first air inlet 315, and the first air inlet 315 is used for communicating the first air outlet 25 with the cavity 314, so that oil gas in the working chamber 11 can enter the cavity 314 through the first air outlet 25 and the first air inlet 315. The separating member 32 is connected between the top cover 312 and the bottom cover 313, and is sleeved on the periphery of the supporting portion 311, the oil intercepted by the separating member 32 can be attached to the inner wall of the supporting portion 311, and under the action of gravity, the oil can flow downwards along the inner wall of the supporting portion 311, and finally can flow back into the working chamber 11 through the first air inlet 315 and the first air outlet 25.

More specifically, the support 311 of the present application may be a rack with a number of holes/channels, whereby the oil and gas in the cavity 314 may pass through the support 311; the separation member 32 of the present application may be a filter cartridge, whereby the oil and gas passing through the support 311 may further pass through the separation member 32 for oil and gas separation.

It will be appreciated that the first separation assembly 3 is a first stage separation of the oil and gas, the first stage separation being capable of initially intercepting part of the oil in the oil and gas then flowing to the second separation assembly 4 for a second stage separation, the second stage separation being capable of further separating the remaining oil in the oil and gas.

Referring to fig. 4, the second separation assembly 4 includes a second body 41. The second body 41 is located at a side of the first body 31 away from the ball float valve assembly 2, a containing cavity 411 extending along the first direction is arranged at a side of the second body 41 close to the first body 31, and the first body 31 is at least partially contained in the containing cavity 411. A seal and a bolt are provided between the second body 41 and the housing 1 to achieve a sealed and fixed connection between the second body 41 and the housing 1. The second body 41 is provided therein with a separation passage communicating with the separation member 32 and the external space. The oil gas in the cavity 314 passes through the supporting part 311 and the separating member 32 and then sequentially flows through the accommodating cavity 411 and the separating channel, and the separating channel can perform secondary separation on the oil gas, specifically, the inner wall of the separating channel where the oil with high temperature meets low temperature can be condensed on the inner wall of the separating channel. It is also understood that the separation channel communicates with the separating member 32 and that the separation channel communicates with the receiving chamber 411, and that oil eventually flows back into the working chamber 11 through the receiving chamber 411 and the separating member 32 (described below).

The second body 41 includes a second air inlet 412 and a second air outlet 413. The second air inlet 412 is arranged at one side of the second body 41 close to the first body 31, and the second air inlet 412 is communicated with the accommodating cavity 411; the second air outlet 413 is provided to the outer circumference of the second body 41, and the second air outlet 413 communicates with the external space and the accommodating chamber 411. Further, the separation channel is communicated between the second air inlet 412 and the second air outlet 413, so that the oil gas passing through the separation member 32 can sequentially flow through the accommodating cavity 411, the second air inlet 412, the separation channel and the second air outlet 413, wherein the separated oil is condensed on the inner wall of the separation channel, finally flows back into the working cavity 11 through the second air outlet 413, and the separated gas finally enters the atmosphere from the second air outlet 413.

The separation channel further comprises an inlet channel 42, a communication chamber 43 and a flow guide channel 44. The air inlet 42 extends along the first direction, and the air inlet 42 is communicated with the second air inlet 412; the communication cavity 43 is horizontally arranged, and the communication cavity 43 is used for communicating the air inlet channel 42 and the guide channel 44; one end of the flow guide channel 44 away from the communication cavity 43 is communicated with the second air outlet 413, and the flow guide channel 44 is used for guiding the separated oil and gas. In the actual working process, the oil gas passes through the separating element 32 and sequentially flows through the accommodating cavity 411, the second air inlet 412, the air inlet 42, the communicating cavity 43, the flow guiding channel 44 and the second air outlet 413, wherein the separated oil adheres to the cavity wall of the communicating cavity 43 and the inner wall of the flow guiding channel 44, and finally flows to the second air outlet 413 along the flow guiding channel 44; the separated gas also flows along the flow guide 44 to the second gas outlet 413.

More specifically, the air inlet 42 is located in the middle of the second body 41, the communication cavity 43 is located above the air inlet 42, and a plurality of flow guide channels 44 are provided, as shown in fig. 5, all the flow guide channels 44 are uniformly distributed at intervals on the periphery of the communication cavity 43, in the embodiment disclosed in the present application, four flow guide channels 44 are provided, correspondingly, four second air outlets 413 are also provided, all the second air outlets 413 are uniformly distributed at intervals on the periphery of the second body 41, and are correspondingly provided with the four flow guide channels 44. Of course, in other embodiments, the flow guide 44 and the second air outlet 413 may be provided in two, three, five, etc.

In the first direction, the end of the flow guide 44, which is in communication with the second air outlet 413, is closer to the first body 31 than the end of the flow guide 44, which is in communication with the communication cavity 43, or the position of the communication cavity 43 is higher than the position of the second air outlet 413, i.e. the flow guide 44 is obliquely arranged, so that the separated oil can flow obliquely downwards under the action of the flow guide 44, and the subsequent auxiliary oil can flow back into the accommodating cavity 411 conveniently. Preferably, the angle between the flow guide 44 and the horizontal is set to 10 °, in which case there is sufficient time for oil-gas separation, and the flow rate of the separated oil can be increased.

The second separation assembly 4 further comprises an oil return 45. The oil return member 45 is annular, the oil return member 45 is sleeved on the periphery of the second body 41, specifically, the bottom of the oil return member 45 is connected with the second body 41, and preferably, the oil return member 45 and the second body 41 are integrally formed. An annular oil return groove 46 with an upward opening is formed between the oil return piece 45 and the second body 41, the second air outlet 413 is in the range of the oil return groove 46, the air separated through the separation channel can flow from the second air outlet 413 to the oil return groove 46 and finally enter the atmosphere, the oil separated through the separation channel can flow from the second air outlet 413 to the oil return groove 46, and the oil return groove 46 plays a role of receiving the oil. Further, referring to fig. 6, the second body 41 further includes an oil return port 414, and the oil return port 414 is located below the second air outlet 413 and is communicated with the accommodating chamber 411 and the oil return tank 46, so that oil in the oil return tank 46 can flow back into the accommodating chamber 411 via the oil return port 414.

The number of the oil return ports 414 is plural, in the embodiment disclosed in the present application, four oil return ports 414 are provided, and four oil return ports 414 are uniformly spaced at the periphery of the second body 41.

A first angle a is formed between the inner wall of the oil return member 45 and the outer wall of the second body 41, the first angle a being in the range of 10 deg. -20 deg., preferably the first angle a being set to 15 deg.. The inner wall of the oil return opening 414 far from the second air outlet 413 and the inner wall of the first body 31 form a second included angle B, and the second included angle B ranges from 40 ° to 50 °, and is preferably set to 45 °. The arrangement of the first included angle a and the second included angle B is beneficial to the processing and assembly of components, and meanwhile, the oil return speed in the oil return groove 46 can be increased, so that the oil can return to the accommodating cavity 411 as soon as possible.

Referring again to fig. 4, the second separation assembly 4 further includes a first filter element 47. The first filter elements 47 are disposed in the oil return openings 414, and it is understood that the number of the first filter elements 47 corresponds to the number of the oil return openings 414. The bottom wall of the oil return opening 414 is obliquely arranged, the top end of the second filter element 48 is movably connected with the second body 41, and the bottom end of the second filter element 48 abuts against the bottom wall of the oil return opening 414, so that the first filter element 47 can swing towards the side close to the accommodating cavity 411, but cannot swing towards the side close to the oil return groove 46. In the actual working process, the gas in the working chamber 11 flows upwards under the pressure of the oil liquid below, and the oil gas separated by the separating piece 32 enters the accommodating chamber 411, in the process, no gap exists between the first filter piece 47 and the oil return port 414, so that the oil gas in the accommodating chamber 411 does not flow away from the oil return port 414, but continues to flow upwards to enter the separating channel, and certainly, the oil gas does not pass through the first filter piece 47; after oil-gas separation, the gas flows to the oil return groove 46 and upwards to the atmosphere, and the oil flows downwards to the oil return groove 46 and enters the containing cavity 411 through the oil return opening 414, in the process, the first filter element 47 plays a role in filtering oil, and when the oil quantity is large, the first filter element 47 can be pushed to quickly flow back to the containing cavity 411 from a gap between the first filter element 47 and the oil return opening 414. When the amount of oil flowing back into the accommodating cavity 411 is not large, the oil is temporarily stored in the accommodating cavity 411 (carried by the bottom cover 313), and the oil can be guided back into the working cavity 11 in a manual auxiliary mode during subsequent maintenance; when the amount of oil flowing back into the accommodating chamber 411 is large, oil accumulates between the separating member 32 and the inner wall of the housing 1, and as the oil increases, the oil gradually permeates through the separating member 32, and at this time, the oil enters the cavity 314 and finally flows back into the working chamber 11 through the first air inlet 315 and the first air outlet 25.

The second separation assembly 4 further comprises a second filter 48. The second filter element 48 is annular, the second filter element 48 is connected between the second body 41 and the oil return element 45, and in the first direction, the second filter element 48 is further away from the oil return opening 414 relative to the second air outlet 413, i.e. the second filter element 48 is located above the second air outlet 413, and the separated gas can pass through the second filter element 48 to enter the atmosphere, and meanwhile, the second filter element 48 plays a role of isolating the oil return groove 46 and the external space so as to prevent external foreign matters from entering the second separation assembly 4.

These terms "first," "second," if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A retarder oil and gas separator comprising:

A housing;

The ball float valve assembly is arranged in the shell and comprises a working cavity, and the ball float valve assembly is configured to discharge gas out of the working cavity under the action of oil liquid;

The first separation assembly is arranged in the shell, and comprises a first body and a separation piece, wherein the first body is connected with the ball float valve assembly and communicated with the working cavity, and the separation piece is arranged on the periphery of the first body; and

The second separation assembly is arranged in the shell and comprises a second body, the second body is positioned at one side of the first body away from the ball float valve assembly, a separation channel is arranged in the second body, and the separation channel is communicated with the separation piece and the external space;

the separation piece is used for carrying out primary separation on oil gas in the first body, so that the separated oil can flow back to the working cavity, and the separation channel is used for carrying out secondary separation on the oil gas passing through the separation piece, so that the separated oil can flow back to the working cavity and the separated gas can flow to an external space.

2. The retarder gas-oil separator according to claim 1, wherein the first body comprises a support portion, a top cover and a bottom cover, wherein the support portion and the separator are connected between the top cover and the bottom cover, a cavity for the flow of oil gas is enclosed between the support portion, the top cover and the bottom cover, the support portion is nested inside the separator so that the oil separated by the separator can be attached to the support portion, and the bottom cover is provided with a first air inlet communicating the working cavity and the cavity.

3. The retarder gas-oil separator device according to claim 1, wherein a receiving chamber extending in a first direction is provided on a side of the second body adjacent to the first body, the first body being at least partially received in the receiving chamber, the second body comprising a second gas inlet communicating with the receiving chamber, so that the gas passing through the separator can flow through the receiving chamber to the second gas inlet.

4. The retarder gas-oil separator of claim 3, wherein the second body further comprises a gas outlet communicating with the external space, the separation channel further comprises a gas inlet channel, a communication cavity and a flow guiding channel, the gas inlet channel is communicated with the second gas inlet, the communication cavity is used for communicating the gas inlet channel and the flow guiding channel, one end of the flow guiding channel away from the communication cavity is communicated with the gas outlet, and the flow guiding channel is used for guiding separated oil and gas.

5. The retarder gas-oil separator of claim 4, wherein the inlet passage extends in the first direction in which an end of the flow guide passage that communicates with the gas outlet is closer to the first body than an end that communicates with the communication chamber.

6. The oil-gas separation device of a retarder according to claim 4, wherein the second separation assembly further comprises an oil return member, the oil return member is sleeved on the periphery of the second body, an oil return groove is formed between the oil return member and the second body, the second body further comprises an oil return port communicated with the accommodating cavity, and the air outlet is communicated with the oil return port through the oil return groove, so that oil separated by the separation channel can flow back to the accommodating cavity through the oil return groove and the oil return port.

7. The retarder gas-oil separator of claim 6, wherein a first angle is formed between the oil return member inner wall and the second body outer wall, the first angle being in the range of 10 ° -20 °.

8. The retarder gas-oil separator of claim 6, wherein a second angle is formed between an inner wall of the oil return port remote from the oil return groove and the inner wall of the first body, the second angle being in the range of 40 ° -50 °.

9. The retarder oil and gas separator of claim 6, wherein the second separator assembly further comprises a first filter member disposed within the oil return port and movably coupled to the second body, the first filter member configured to swing toward a side proximate the receiving cavity.

10. A retarder gas-oil separator device according to any of claims 6-9, wherein the second separator assembly further comprises a second filter element connected between the second body and the oil return element, the second filter element being further away from the oil return opening in the first direction relative to the gas outlet.