CN214366285U

CN214366285U - Oil-gas separator

Info

Publication number: CN214366285U
Application number: CN202023113918.7U
Authority: CN
Inventors: 刘佳佳; 孔凡强; 李长龙
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-10-08
Anticipated expiration: 2030-12-22

Abstract

The utility model discloses an oil and gas separator relates to engine technical field. The oil-gas separator comprises a shell, a collision type separating mechanism and an oil baffle plate, wherein both ends of the shell are respectively provided with a gas inlet and a gas outlet; the collision type separating mechanism and the oil baffle plate are arranged in the shell; the collision type separating mechanism comprises at least two separating cavities, the at least two separating cavities are arranged side by side along the width direction of the shell, the inlet of each separating cavity is provided with a one-way valve, and the one-way valve can be opened under the pressure of the oil-gas mixture so that the oil-gas mixture enters the separating cavities. The oil baffle is positioned in front of the gas outlet, and a gas circulation channel is arranged between the oil baffle and the inner cavity of the shell, so that gas separated by collision of the oil-gas mixture separated by the collision type separating mechanism and the oil baffle is discharged from the gas outlet. The utility model provides an oil and gas separator can guarantee oil-gas separation efficiency when the crankcase blowby volume is lower, and with low costs.

Description

Oil-gas separator

Technical Field

The utility model relates to the technical field of engines, especially, relate to an oil and gas separator.

Background

The oil-gas separator is a main component in a crankcase ventilation system, separates engine oil in crankcase blow-by gas, and the separation performance of the oil-gas separator has important influence on the emission performance and the reliability of a diesel engine.

As shown in fig. 1, an oil-gas separator in the prior art includes a housing 1 ', an air inlet 11' and an air outlet 12 'are provided on the housing 1', a labyrinth separating mechanism 2 ', an orifice plate 3' and an oil baffle plate 4 'are sequentially provided between the air inlet 11' and the air outlet 12 ', and the oil droplets are thrown toward a wall surface to be separated by using inertia of the oil droplets during movement of an air flow in the separating mechanism 2'. This labyrinth separating mechanism 2 ' does not have variable flow area, and when the crankcase blowby volume was less, when the oil-gas mixture passed through orifice plate 3 ', there was not enough big pressure to make oil drop and 4 ' collisions of oil baffle, leads to oil-gas separation efficiency to be lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil and gas separator, this oil and gas separator can guarantee sufficient pressure impact oil baffle under the lower condition of oil-gas mixture scurry tolerance, and separation efficiency is high.

To achieve the purpose, the utility model adopts the following technical proposal:

an oil and gas separator, comprising:

the air conditioner comprises a shell, wherein an air inlet and an air outlet are respectively arranged at two ends of the shell;

the collision type separation mechanism is arranged in the shell and comprises at least two separation cavities which are arranged side by side, a one-way valve is arranged at an inlet of each separation cavity and can be gradually opened under the pressure of an oil-gas mixture, so that the oil-gas mixture enters the separation cavities;

The oil baffle is arranged in the shell and positioned in front of the gas outlet, a gas circulation channel is arranged between the oil baffle and the inner cavity of the shell, so that the oil-gas mixture separated by the collision type separating mechanism and the gas separated by the oil baffle in a collision way are discharged from the gas outlet.

Optionally, the cracking pressure of the one-way valve on each of the separation chambers is different.

Optionally, the one-way valve includes a closing part and a connecting part, one end of the connecting part is connected with the closing part, and the other end is connected with the inner wall of the separation cavity; the connecting part and the closing part are connected by elastic deformation force, so that the closing part always has the tendency of being far away from the inlet of the separation cavity under the pressure of the oil-gas mixture.

Optionally, the opening angle of the closure is 0 ° to 90 °.

Optionally, the stiffness of the connection portion and the closure portion of each one-way valve is different so that the cracking pressure of each one-way valve is different.

Optionally, the one-way valve is made of an elastic material, and the width of the closing portion is larger than the width of the connecting portion.

Optionally, a plurality of vent holes are arranged on the side plate at the outlet side of the separation cavity at intervals.

Optionally, the oil-gas separator further comprises a labyrinth separation mechanism, and the labyrinth separation mechanism and the collision separation mechanism are sequentially arranged between the gas inlet and the gas outlet.

Optionally, the oil-gas separator further comprises an oil outlet pipeline, and the oil outlet pipeline comprises a first oil outlet pipeline and a second oil outlet pipeline; the first oil outlet pipeline is arranged between the labyrinth separation mechanism and the collision separation mechanism and is used for discharging oil separated by the labyrinth separation mechanism; the second oil outlet pipeline is arranged between the oil baffle and the air outlet and used for discharging oil separated by the collision type separating mechanism.

Optionally, the first oil outlet pipeline is arranged in a bent shape, and the lowest point of the first oil outlet pipeline is lower than the outlet of the first oil outlet pipeline.

The utility model has the advantages that:

the utility model provides an oil and gas separator through set up collision formula separating mechanism in the casing, collision formula separating mechanism includes two at least separating chambers, and two at least separating chambers set up side by side along the width direction of casing. The inlet of the separation cavity is provided with a one-way valve which can be gradually opened under the pressure of the oil-gas mixture so that the oil-gas mixture enters the separation cavity. The air flow pressure is different because of the different blow-by amount of the oil-gas mixture. In the collision type separating mechanism, at least two separating cavities are arranged side by side along the width direction of the shell, and the volume of each separating cavity is smaller than that of the separating cavity of the labyrinth type separating mechanism in the prior art. Moreover, the check valve can be gradually opened along with the difference of the air flow pressure of the oil-gas mixture, and the flow area is variable. When the blow-by amount of the oil-gas mixture is small, the check valve can be opened by the airflow pressure of the oil-gas mixture, the oil-gas mixture enters the small-volume separation cavity for oil-gas separation, and the oil baffle plate is still impacted by sufficient pressure after the oil-gas mixture comes out from the separation cavity, so that the oil-gas separation efficiency is ensured.

Drawings

FIG. 1 is a schematic diagram of an oil-gas separator in the prior art;

fig. 2 is a top view of an internal structure of an oil separator according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a collision type separating mechanism according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an oil-gas separator according to an embodiment of the present invention.

In the figure:

1', a housing; 2' and a labyrinth separation mechanism; 3', a well plate; 4', an oil baffle plate;

11', an air inlet; 12' and an air outlet;

1. a housing; 2. a labyrinth separation mechanism; 3. a collision type separating mechanism; 4. an oil baffle plate; 5. an oil outlet pipeline;

11. an air inlet; 12. an air outlet; 31. a one-way valve; 32. a separation chamber; 33. a vent hole; 41. accommodating grooves; 51. a first oil outlet pipeline; 52. a second oil outlet pipeline;

311. a closing part; 312. a connecting portion.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 2, the present embodiment provides an oil-gas separator, which includes a casing 1, a collision-type separation mechanism 3, and an oil baffle 4, wherein both ends of the casing 1 are respectively provided with an air inlet 11 and an air outlet 12; the collision type separating mechanism 3 and the oil baffle plate 4 are both arranged in the shell 1; the collision type separating mechanism 3 comprises at least two separating cavities 32, the at least two separating cavities 32 are arranged side by side along the width direction of the shell 1, a one-way valve 31 is arranged at the inlet of each separating cavity 32, and the one-way valve 31 can be gradually opened under the pressure of the oil-gas mixture so that the oil-gas mixture enters the separating cavities 32. The oil baffle 4 is positioned in front of the gas outlet 12, and a gas circulation channel is arranged between the oil baffle 4 and the inner cavity of the shell 1, so that the gas separated by the collision of the oil-gas mixture separated by the collision type separation mechanism 3 and the oil baffle 4 is discharged from the gas outlet 12.

In the oil-gas separator provided by the embodiment, the collision type separation mechanism 3 is arranged in the housing 1, the collision type separation mechanism 3 comprises at least two separation cavities 32, and the at least two separation cavities 32 are arranged side by side along the width direction of the housing 1. The inlet of the separation chamber 32 is provided with a one-way valve 31, and the one-way valve 31 can be gradually opened under the pressure of the oil-gas mixture so that the oil-gas mixture enters the separation chamber 32. The air flow pressure is different because of the different blow-by amount of the oil-gas mixture. In collision formula separating mechanism 3, at least two separation chamber 32 set up side by side along the width direction of casing 1, and the volume of each separation chamber 32 is less than the volume of the separation chamber body of labyrinth separating mechanism 2' among the prior art. Moreover, the check valve 31 can be opened gradually according to the pressure of the oil-gas mixture, and the flow area is variable. When the blow-by amount of the oil-gas mixture is small, the check valve 31 can be opened by the airflow pressure of the oil-gas mixture, the oil-gas mixture enters the separation cavity 32 with a small volume for oil-gas separation, and sufficient pressure still exists after the oil-gas mixture comes out from the separation cavity 32 to impact the oil baffle plate 4, so that the oil-gas separation efficiency is ensured.

Alternatively, the cracking pressure of the check valve 31 on each separation chamber 32 is different. The separation cavities 32 with different opening pressures are arranged, the oil-gas mixture with different air blow-by amounts can open the separation cavities 32 with different opening pressures, so that the oil baffle plate 4 is impacted by sufficient pressure after the oil-gas mixture is separated by the separation cavities 32 with small volumes, and the separation efficiency is improved.

As shown in fig. 3, in the present embodiment, the collision type separation mechanism 3 includes four separation chambers 32, the four separation chambers 32 are arranged in two rows and two columns, one check valve 31 is arranged at an inlet of each separation chamber 32, the opening pressures of the four check valves 31 gradually increase, and the separation chamber 32 corresponding to the check valve 31 with the smallest opening pressure can be opened by the airflow pressure of the minimum blow-by amount in the crankcase.

Optionally, the one-way valve 31 comprises a closing part 311 and a connecting part 312, one end of the connecting part 312 is connected with the closing part 311, and the other end is connected with the inner wall of the separation chamber 32; the junction of the connecting portion 312 and the closing portion 311 has an elastic deformation force so that the closing portion 311 always has a tendency to be away from the inlet of the separation chamber 32 under the pressure of the oil-gas mixture. Specifically, the check valve 31 is made of an elastic material, and the width of the closing portion 311 is greater than the width of the connecting portion 312. In the present embodiment, the check valve 31 is a mechanical valve body, and the closing portion 311 and the connecting portion 312 are of an integral structure and are made of a spring plate. The shape of the closing part 311 is matched with the shape of the inlet of the separation chamber 32, and the closing part 311 is rectangular, so that the closing part 311 can completely close the inlet of the separation chamber 32. When the air flow of the oil-gas mixture impacts the closing part 311, the pressure of the air flow pushes the closing part 311 to move against the elastic force matching with or smaller than the pressure thereof, so that the inlet of the separation chamber 32 is opened. The connecting portion 312 is also rectangular, and one end of the connecting portion 312 is connected to the middle of the closing portion 311, and the other end is welded to the side wall of the separation chamber 32 adjacent to the side wall where the inlet is located. The connection point of the connection part 312 and the closing part 311 is deformed when air pressure exists, so that air flows enter the separation chamber 32, when the air pressure does not exist, the connection point is reset under the action of self elastic restoring force, and the closing part 311 closes the inlet of the separation chamber 32. The check valve 31 has a simple structure and low cost.

In another optional embodiment of the present invention, the closing portion 311 may also be made of rubber with good sealing performance, and the closing portion 311 made of rubber is connected to the connecting portion 312 made of spring leaf in a clamping manner. Of course, the closing part 311 and the connecting part 312 may be made of rubber, and the connecting part 312 is adhered to the sidewall of the separation chamber 32 by an adhesive tape.

Alternatively, the opening angle of the closing portion 311 is 0 ° to 90 °. The blow-by amount of the oil-gas mixture is different, the opening angle of the closing part 311 is different, when the blow-by amount in the crankcase is the minimum, the check valve 31 with the minimum opening pressure can be opened, along with the gradual increase of the blow-by amount, the opening angle of the check valve 31 is gradually increased until the opening angle of the closing part 311 is 90 degrees, and the inlet of the separation chamber 32 is completely opened.

Alternatively, the rigidity at the junction of the connecting portion 312 and the closing portion 311 of each check valve 31 is different so that the opening pressure of each check valve 31 is different. In the present embodiment, the stiffness of the check valve 31 is different by selecting the width, thickness and other parameters of the spring piece, so as to obtain check valves 31 with different elastic forces, and the opening pressures of the four check valves 31 are different. Under the condition of realizing different blow-by amounts, the opening angle of a single one-way valve 31 is different, and the opening quantity of four one-way valves 31 is different, so that the variable flow area is achieved, and the oil-gas separation efficiency is improved.

Optionally, a plurality of vent holes 33 are arranged at intervals on the side plate at the outlet side of the separation cavity 32. The arrangement of the vent hole 33 reduces the flow area when the oil-gas mixture separated by the separation cavity 32 leaves the separation cavity 32, thereby increasing the pressure of the air flow, enabling the air flow to have enough pressure to impact the oil baffle plate 4, and further ensuring the oil-gas separation efficiency.

Alternatively, as shown in fig. 4, the oil deflector 4 is provided with a plurality of receiving grooves 41 in the height direction thereof. In this embodiment, the oil baffle 4 is a felt plate to improve the separation of oil. The arrangement of the accommodating groove 41 increases the collision area of the oil-gas mixture and the oil baffle plate 4, so that oil and liquid can be separated more easily.

Optionally, the oil separator further includes a labyrinth separation mechanism 2, and the labyrinth separation mechanism 2 and the collision separation mechanism 3 are sequentially disposed between the air inlet 11 and the air outlet 12. In the present embodiment, the labyrinth separation mechanism 2 is disposed near the air inlet 11, and the collision separation mechanism 3 is disposed between the labyrinth separation mechanism 2 and the air outlet 12. Of course, in other embodiments, the positions of the collision separation mechanism 3 and the labyrinth separation mechanism 2 are not limited, and the collision separation mechanism 3 may be disposed near the air inlet 11, and the labyrinth separation mechanism 2 may be disposed between the collision separation mechanism 3 and the air outlet 12.

In the present embodiment, the labyrinth separation mechanism 2 is a prior art labyrinth separation mechanism. The labyrinth type separating mechanism 2 can rapidly separate oil-gas mixtures with large blow-by amount, and the collision type separating mechanism 3 has at least two separating cavities 32 with different opening pressures, which can separate oil-gas mixtures with small blow-by amount. The minimum opening pressure of the check valve 31 in at least two separation chambers 32 is set according to the minimum amount of blow-by gas in the crankcase. The maximum opening pressure of the check valve 31 is less than or equal to the airflow pressure corresponding to the minimum blow-by amount that the labyrinth separation mechanism 2 can separate. Oil-gas mixture entering the shell 1 from the air inlet 11 is subjected to oil-gas separation twice through the labyrinth separation mechanism 2 and the collision separation mechanism 3, so that not only can the oil-gas mixture with high blow-by amount be quickly separated, but also the oil-gas mixture with low blow-by amount can be separated, and the oil-gas separation efficiency is improved.

Alternatively, the air inlet 11 and the air outlet 12 are both disposed at an upper portion of the housing 1 in the height direction, and the oil outlet pipe 5 is disposed at a lower portion of the housing 1 in the height direction. Because the gas flows upwards and the liquid flows downwards, the gas inlet 11 and the gas outlet 12 are arranged at the upper part of the shell 1, and the oil outlet pipeline 5 is arranged at the lower part of the shell 1, the separated gas and oil liquid are easier to discharge respectively.

Specifically, the oil outlet pipeline 5 includes a first oil outlet pipeline 51 and a second oil outlet pipeline 52, and the first oil outlet pipeline 51 is arranged between the labyrinth separation mechanism 2 and the collision separation mechanism 3 and used for discharging oil separated by the labyrinth separation mechanism 2; the second oil outlet pipeline 52 is disposed between the oil baffle 4 and the air outlet 12, and is used for discharging the oil separated by the collision type separation mechanism 3.

Alternatively, the first oil outlet line 51 is provided in a curved shape, and the lowest point of the first oil outlet line 51 is lower than the outlet of the first oil outlet line 51. In the present embodiment, the first oil outlet pipeline 51 is configured as a U-shaped pipeline, the second oil outlet pipeline 52 is a vertical pipeline, and an outlet of the U-shaped pipeline is communicated with the vertical pipeline. The first oil outlet pipe 51 is configured to store oil in a curved shape, and prevents the oil-gas mixture separated by the labyrinth separation mechanism 2 from escaping through the first oil outlet pipe 51.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. An oil and gas separator, comprising:

The air conditioner comprises a shell (1), wherein an air inlet (11) and an air outlet (12) are respectively arranged at two ends of the shell (1);

the collision type separation mechanism (3) is arranged in the shell (1), the collision type separation mechanism (3) comprises at least two separation cavities (32), the at least two separation cavities (32) are arranged side by side along the width direction of the shell (1), a one-way valve (31) is arranged at an inlet of each separation cavity (32), and the one-way valve (31) can be gradually opened under the pressure of an oil-gas mixture so that the oil-gas mixture enters the separation cavities (32);

the oil baffle plate (4) is arranged in the shell (1) and is positioned in front of the gas outlet (12), a gas circulation channel is arranged between the oil baffle plate (4) and the inner cavity of the shell (1), so that the oil-gas mixture separated by the collision type separating mechanism (3) and gas separated by the oil baffle plate (4) are discharged from the gas outlet (12).

2. Oil separator according to claim 1, characterized in that the opening pressure of the one-way valve (31) on each separation chamber (32) is different.

3. Oil separator according to claim 2, characterized in that the one-way valve (31) comprises a closing portion (311) and a connecting portion (312), one end of the connecting portion (312) being connected to the closing portion (311) and the other end being connected to the inner wall of the separation chamber (32); the connection part (312) and the closing part (311) have elastic deformation force, so that the closing part (311) always has the tendency of being far away from the inlet of the separation cavity (32) under the pressure of the oil-gas mixture.

4. Oil separator according to claim 3, characterized in that the opening angle of the closing part (311) is 0-90 °.

5. Oil separator according to claim 3, characterized in that the stiffness of the connection portion (312) and the closure portion (311) of each check valve (31) is different so that the opening pressure of each check valve (31) is different.

6. Oil separator according to claim 3, characterized in that the one-way valve (31) is made of an elastic material and the width of the closing portion (311) is greater than the width of the connecting portion (312).

7. Oil separator as in claim 1, characterized in that the side plate of the outlet side of the separation chamber (32) is provided with a plurality of vent holes (33) at intervals.

8. Oil separator in accordance with any of claims 1-7, characterized in that it further comprises a labyrinth separation mechanism (2), said labyrinth separation mechanism (2) and said collision separation mechanism (3) being arranged in sequence between said gas inlet (11) and said gas outlet (12).

9. Oil separator according to claim 8, further comprising an oil outlet line (5), the oil outlet line (5) comprising a first oil outlet line (51) and a second oil outlet line (52); the first oil outlet pipeline (51) is arranged between the labyrinth separation mechanism (2) and the collision separation mechanism (3) and is used for discharging oil separated by the labyrinth separation mechanism (2); the second oil outlet pipeline (52) is arranged between the oil baffle (4) and the air outlet (12) and is used for discharging oil separated by the collision type separating mechanism (3).

10. Oil separator according to claim 9, characterized in that the first oil outlet line (51) is arranged curved and the lowest point of the first oil outlet line (51) is lower than the outlet of the first oil outlet line (51).