Variable-section oil-gas separation module

Abstract

The utility model relates to a variable section oil-gas separation module which comprises a separation chamber, a valve element is arranged in the separation chamber in a sliding mode so as to divide the separation chamber into a first cavity and a second cavity, the valve element provides elastic force through an elastic piece, a plurality of orifices are formed in the side wall of the separation chamber, and adsorption parts are arranged outside the orifices. An oil-gas mixture enters from the first cavity, and the valve element moves to the second cavity through pressure, so that the total area of communicating orifices of the first cavity adapts to the pressure of the oil-gas mixture. According to the oil-gas separation module, the orifice is opened or closed through axial movement of the valve element, the total conduction area of the orifice is variable, namely, the section of the separation module is variable, so that the flow rate is still high under the condition of low blow-by amount, oil drops more effectively impact an adsorption component, and the oil-gas separation efficiency of the low blow-by amount is improved; and PN and PM values of an emission test of the open crankshaft ventilation system of the diesel engine are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of crankcase ventilation systems, and particularly relates to a variable cross-section oil-gas separation module. Background Technique

[0002] When the engine is working, a part of the exhaust gas leaks from the combustion chamber piston ring into the engine crankcase. These exhaust gases are mixed with the oil particles inside the engine to form crankcase blow-by. If these blow-bys are directly discharged into the atmosphere, it will cause air pollution; if they directly enter the combustion chamber, due to the high oil content in the blow-by, it will cause serious carbon deposition in the combustion chamber and reduce the power performance of the engine.

[0003] When the diesel engine with a closed crankcase ventilation system is working in winter, the outlet pipe of the crankcase ventilation system is prone to icing. Ice particles falling on the high-speed rotating turbocharger will cause the turbocharger to be scrapped. To solve this problem, diesel engine manufacturers tend to adopt an open crankcase ventilation system. Such a choice will bring a new problem: the direct discharge of crankcase blow-by into the atmosphere will cause an increase in engine PN and PM, making it difficult to meet the emission standards. When the engine is performing WHTC and WHSC emission tests, the test conditions are composite conditions including low load and high load, and the corresponding crankcase blow-by volume is large or small, and the weight of the low blow-by volume condition is greater. The traditional constant cross-section oil-gas separation module is generally designed according to the high blow-by volume, and its separation efficiency is often low under the low blow-by volume. Therefore, there is an urgent need for a separation module with high separation efficiency even under low blow-by volume. Content of the Utility Model

[0004] The purpose of the utility model is to provide a variable cross-section oil-gas separation module to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A variable cross-section oil-gas separation module includes a separation chamber. A valve core is slidably arranged in the separation chamber to divide the separation chamber into a first chamber and a second chamber. The valve core is provided with elastic force by an elastic member. Among them, a plurality of apertures are arranged on the side wall of the separation chamber, and an adsorption component is arranged outside the apertures. The oil-gas mixture enters from the first chamber, and the valve core is moved towards the second chamber by pressure, so that the total area of the apertures for connecting the first chamber is adapted to the pressure of the oil-gas mixture.

[0007] As a further optimized solution of the present utility model, a plurality of flow guiding ribs are provided on the outer wall of the separation chamber. The flow guiding ribs are arranged between the hole openings and the adsorption component to form a gas flow channel between the separation chamber and the adsorption component. The direction of this gas flow channel forms an angle with the air flow direction of the hole openings. In this solution, through the gas flow channel formed by the flow guiding ribs and by changing the air flow direction of the hole openings, the oil liquid hits the adsorption component due to inertia, and this gas flow channel always remains unobstructed, and will not cause poor air outlet due to excessive oil liquid on the surface of the adsorption component. Moreover, the turning of this air flow will also blow the liquid droplets hitting the adsorption component downward, which can effectively help the liquid droplets on the surface of the adsorption component to converge in the direction where they can be collected.

[0008] As a further optimized solution of the present utility model, cover plates for fixing the adsorption component are provided on both sides of the separation chamber. Among them, the upper end of the separation chamber extends outwards on both sides with buckles that are snap-connected to the cover plates. The bottom of the flow guiding ribs extends and protrudes towards the cover plate direction, forming an installation groove for accommodating the adsorption component with the cover plate. By installing the adsorption component in this way, the structure is simplified, and the area surrounded by the cover plate, the buckles and the flow guiding ribs can restrict the gas in the flow guiding ribs from discharging downward.

[0009] As a further optimized solution of the present utility model, the hole openings are divided into two columns and are respectively arranged on both side walls of the separation chamber, and the distribution direction is along the axial direction of the spool of the separation chamber. In this solution, two columns of hole openings are provided, and the hole openings are arranged on both sides of the separation chamber, so that the air flow discharged from the hole openings is discharged horizontally, which is convenient for subsequent turning.

[0010] As a further optimized solution of the present utility model, the two columns of hole openings are arranged at intervals. By arranging the hole openings at intervals, the opening degree of the spool and the total area of the hole openings tend to change linearly, and the process of changing the total cross-sectional area of the hole openings according to the pressure of the oil-gas mixture is smoother.

[0011] As a further optimized solution of the present utility model, the spool includes a valve member that separates the separation chamber and a valve rod that extends from the axis of the valve member towards the second chamber. The elastic member is a spring and is sleeved outside the valve rod. This solution specifically proposes a spool structure with simple structure and stable operation, and its sealing effect is better.

[0012] As a further optimized solution of the present utility model, a limiting portion is provided between the valve member and the separation chamber. The limiting portion is used to limit the degree of movement of the valve member towards the first chamber to at least keep one hole opening communicating with the first chamber. When the oil-gas mixture enters the first chamber, it is necessary to ensure that at least one hole opening is unobstructed, so that when the amount of gas leakage is small, there is no need to consume pressure to push open the spool, and the oil-gas mixture can hit the adsorption component at a higher flow rate.

[0013] As a further optimization solution of the utility model, a packaging cover is provided at one end of the separation chamber close to the second chamber. The packaging cover includes a positioning hole for accommodating the sliding and limiting of the valve stem, and a mounting hole for accommodating the elastic member.

[0014] As a further optimization solution of the utility model, a fine separation plate is provided at one end of the separation chamber close to the first chamber. A flow guide plate is further provided on the surface of the fine separation plate for guiding the separated gas, facilitating the processing of the separated oil and gas by external structures.

[0015] The beneficial effects of the utility model are as follows:

[0016] By axially moving the valve core of the utility model to open or close the hole, the total conduction area of the hole is made variable, that is, the cross-section of the separation module is variable, so that a relatively high flow rate can still be achieved under the condition of low blow-by gas volume, enabling oil droplets to more effectively impact the adsorption component, improving the oil and gas separation efficiency under low blow-by gas volume, and improving the PN and PM values of the emission test of the open crankcase ventilation system of diesel engines. Brief Description of the Drawings

[0017] Figure 1 is a three-dimensional schematic diagram of the utility model;

[0018] Figure 2 is a top view sectional structure schematic diagram of the utility model;

[0019] Figure 3 is the utility model Figure 1 schematic diagram after removing the cover plate, adsorption component and packaging cover;

[0020] In the figure: 1, fine separation plate; 11, separation chamber; 12, installation groove; 13, flow guide rib; 14, buckle; 15, hole; 16, first chamber; 17, second chamber; 18, limiting part; 19, flow guide plate; 2, valve core; 21, valve part; 22, valve stem; 3, packaging cover; 31, mounting hole; 32, positioning hole; 4, elastic member; 5, adsorption component; 6, cover plate. Detailed Embodiments

[0021] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Embodiment 1

[0023] As Figures 1-3As shown in the figure, a variable cross-section oil-gas separation module includes a separation chamber 11. A valve core 2 is slidably arranged in the separation chamber 11 to divide the separation chamber 11 into a first chamber 16 and a second chamber 17. The valve core 2 is provided with an elastic force by an elastic member 4. Among them, several apertures 15 are opened on the side wall of the separation chamber 11, and an adsorption component 5 is arranged outside the apertures 15. The oil-gas mixture enters from the first chamber 16, and the valve core 2 is moved towards the second chamber 17 by pressure, so that the total area of the apertures 15 for connecting the first chamber 16 is adapted to the pressure of the oil-gas mixture. The internal cross-section of the separation chamber 11 is square, circular or other shapes that are easy for the valve core 2 to slide, preferably circular. The adsorption component 5 can be a fabric or other porous adsorption materials.

[0024] In this solution, the apertures 15 are opened or closed by the axial movement of the valve core 2, realizing that the total conduction area of the apertures 15 is variable, that is, the cross-section of the separation module is variable, so that a higher flow rate can still be maintained under the condition of low blow-by gas volume, making the oil droplets more effectively impact the adsorption component 5, improving the oil-gas separation efficiency of low blow-by gas volume, and improving the PN and PM values of the emission test of the open crankcase ventilation system of the diesel engine.

[0025] Furthermore, several flow guiding ribs 13 are arranged on the outer wall of the separation chamber 11. The flow guiding ribs 13 are arranged between the apertures 15 and the adsorption component 5 to form a gas flow channel between the separation chamber 11 and the adsorption component 5. The height of the flow guiding ribs 13 (i.e., the width of the gas flow channel) is at least 0.2 mm. The direction of the gas flow channel is at an angle to the gas flow direction of the apertures 15. Through the gas flow channel formed by the flow guiding ribs 13 and changing the gas flow direction of the apertures 15, the oil liquid impacts the adsorption component 5 due to inertia, and the gas flow channel always remains unobstructed, and the gas outlet will not be blocked due to too many oil droplets on the surface of the adsorption component 5. And the turning of the gas flow will also blow the oil droplets hitting the adsorption component 5 downward, which can effectively help the liquid droplets on the surface of the adsorption component 5 converge in the direction where they can be collected, and also makes the space on the adsorption component 5 in the direction of the droplet impact available for adsorbing subsequent droplets.

[0026] In order to further facilitate the installation and replacement of the adsorption component 5, cover plates 6 for fixing the adsorption component 5 are arranged on both sides of the separation chamber 11. Among them, the upper end of the separation chamber 11 extends outwards on both sides to form buckles 14 that are clamped with the cover plates 6. The bottom of the flow guiding ribs 13 extends and protrudes towards the cover plates 6 to form an installation groove 12 for accommodating the adsorption component 5. The adsorption component 5 is installed in this way, which simplifies the structure, and the area surrounded by the cover plates 6, the buckles 14 and the flow guiding ribs 13 can limit the downward discharge of the gas in the flow guiding ribs 13. Exhausting in this direction can blow the oil droplets on the adsorption component 5 downward.

[0027] The orifice 15 is divided into two columns, which are respectively arranged on the two side walls of the separation chamber 11, and the distribution direction is along the axial direction of the valve core 2 of the separation chamber 11. The two columns of orifices 15 are arranged at intervals. In this solution, two columns of orifices 15 are provided, and the orifices 15 are arranged on both sides of the separation chamber 11, so that the airflow discharged from the orifices 15 is discharged transversely, which is convenient for the discharged airflow to be redirected downward by the guide rib 13, so that the airflow turns 90°, which is convenient for the oil-gas mixture to impact the adsorption component 5 when flowing out of the orifice. And the airflow in this direction is vertically downward, which also helps the oil droplets on the adsorption component 5 to converge downward and be discharged. By arranging the orifices 15 at intervals, the opening degree of the valve core 2 and the total area of the orifices 15 tend to change linearly, and the process of changing the total cross-sectional area of the orifices 15 according to the pressure of the oil-gas mixture is smoother. As various implementation manners of this embodiment, the cross-sectional shape of the orifice 15 can be set to be circular, square, or other shapes.

[0028] As another embodiment of the present utility model, the valve core 2 includes a valve member 21 that separates the separation chamber 11 and a valve stem 22 that extends from the axis of the valve member 21 toward the second chamber 17. The elastic member 4 is a spring and is sleeved outside the valve stem 22. This solution specifically proposes a valve core 2 structure with simple structure and stable operation, and its sealing effect is better.

[0029] A limiting portion 18 is provided between the valve member 21 and the separation chamber 11. The limiting portion 18 is used to limit the degree of movement of the valve member 21 toward the first chamber 16, so as to at least keep one orifice 15 communicating with the first chamber 16. When the oil-gas mixture enters the first chamber 16, it is necessary to ensure that at least one orifice 15 is unobstructed, so that when the bypass gas volume is small, the valve core 2 can be pushed open without consuming pressure, so that the oil-gas mixture can impact the adsorption component 5 at a higher flow rate. Among them, as a feasible implementation manner, the limiting portion 18 can be set as a flange extending inward from the inner wall of the separation chamber 11, or can be set as a protrusion extending from the valve member 21 toward the separation chamber 11, and the separation chamber 11 is correspondingly provided with a groove corresponding to the protrusion.

[0030] A sealing cover 3 is provided at one end of the separation chamber 11 close to the second chamber 17. The sealing cover 3 includes a positioning hole 32 for accommodating the sliding and limiting of the valve stem 22 and an installation hole 31 for accommodating the elastic member 4.

[0031] A fine separation plate 1 is provided at one end of the separation chamber 11 close to the first chamber 16. A guide plate 19 is further provided on the surface of the fine separation plate 1 for guiding the separated gas. This structure is used for docking with the external structure. Among them, the oil droplets on the surface of the adsorption component 5 flow downward and converge downward between the protrusions at the bottom of the guide rib 13. The gap at the bottom of the guide rib 13 is a gas discharge channel. The oil droplet discharge port and the gas discharge port can be separated through the external structure, and corresponding subsequent treatments are carried out respectively, which will not be elaborated here.

[0032] The specific implementation method is as follows: the oil-gas mixture enters through the first chamber 16, and the valve member 21 is pushed open to different degrees according to the pressure, so that the first chamber 16 is connected to the orifices 15 of different areas, and the oil-gas mixture is discharged through the orifice 15. The oil droplets collide with the adsorption component 5 due to inertia, while the gas is redirected to enter between the guide ribs 13 and discharged from the bottom of the guide ribs 13. While the gas is discharged, the oil droplets already adsorbed by the adsorption component 5 are blown downward to converge, so as to make room for the adsorption of subsequent oil droplets.

[0033] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A variable cross-section oil-gas separation module, comprising a separation chamber (11), characterized in that: A valve core (2) is slidably provided in the separation chamber (11) to separate the separation chamber (11) into a first chamber (16) and a second chamber (17). The valve core (2) is provided with elastic force by an elastic member (4). A plurality of orifices (15) are provided on the side wall of the separation chamber (11). An adsorption component (5) is provided outside the orifice (15). When the oil-gas mixture enters from the first chamber (16), the valve core (2) is moved toward the second chamber (17) by pressure, so that the total area of the first chamber (16) communicating with the orifice (15) is adapted to the pressure of the oil-gas mixture.

2. The variable cross-section oil-gas separation module according to claim 1, characterized in that: The outer wall of the separation chamber (11) is provided with a plurality of guide ribs (13), which are arranged between the orifice (15) and the adsorption component (5) to form a gas flow channel between the separation chamber (11) and the adsorption component (5), and the direction of the gas flow channel is at an angle to the airflow direction of the orifice (15).

3. The variable cross-section oil-gas separation module according to claim 2, characterized in that: Cover plates (6) for fixing the adsorption component (5) are provided on both sides of the separation chamber (11), wherein buckles (14) for engaging with the cover plates (6) are extended from the upper end of the separation chamber (11) to both sides, and the bottom of the guide rib (13) extends and protrudes toward the cover plate (6), forming a mounting groove (12) for accommodating the adsorption component (5) between the guide rib and the cover plate (6).

4. The variable cross-section oil-gas separation module according to claim 1, characterized in that: The orifices (15) are divided into two rows and are respectively arranged on the two side walls of the separation chamber (11), and the distribution direction is along the axial direction of the valve core (2) of the separation chamber (11).

5. The variable cross-section oil-gas separation module according to claim 4, characterized in that: The two rows of openings (15) are spaced apart from each other.

6. The variable cross-section oil-gas separation module according to claim 1, characterized in that: The valve core (2) comprises a valve member (21) for separating the separation chamber (11), and a valve stem (22) extending from the axis of the valve member (21) toward the second chamber (17); the elastic member (4) is a spring, which is sleeved on the outside of the valve stem (22).

7. The variable cross-section oil-gas separation module according to claim 6, characterized in that: A limiting portion (18) is provided between the valve member (21) and the separation chamber (11), and the limiting portion (18) is used to limit the extent to which the valve member (21) moves toward the first chamber (16) so as to maintain at least one orifice (15) in communication with the first chamber (16).

8. The variable cross-section oil-gas separation module according to claim 6, characterized in that: A packaging cover (3) is provided at one end of the separation chamber (11) close to the second chamber (17), and the packaging cover (3) includes a positioning hole (32) for accommodating the sliding of the valve stem (22) and limiting the position, and a mounting hole (31) for accommodating the elastic member (4).

9. A variable cross-section oil-gas separation module according to any one of claims 1 to 8, characterized in that: A fine separation plate (1) is provided at one end of the separation chamber (11) close to the first chamber (16), and a guide plate (19) is further provided on the surface of the fine separation plate (1) for guiding the separated gas.

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