Oil-gas separator and vehicle

Abstract

The present invention relates to the field of vehicle technology, and specifically discloses an oil-gas separator and a vehicle. The oil-gas separator includes a shell, a separation structure, and a separation assembly. The separation structure is located in an outer cavity and can perform initial separation on the fluid entering from the air inlet. The fluid after the initial separation passes through the outer cavity into the inner cavity and is subjected to secondary separation through a plurality of vertically arranged separation channels in the separation assembly. Since the fluid passes through the separation channel from bottom to top, solid particles and small particles of engine oil can continuously collide with the inner wall of the separation channel when flowing through the separation channel, so that they can be fully absorbed. The separation structure and vertically distributed separation channels designed in the present invention can both separate solid particles in the fluid while taking into account the processing of small particles of engine oil, effectively solving the problem of poor solid particle separation effect of the oil-gas separator in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an oil-gas separator and a vehicle. Background Art

[0002] Currently, internal combustion engines are setting ever-higher burst pressures. As the high-pressure fuel gas pushes the piston to produce work, some exhaust gases inevitably leak from the combustion chamber through the piston rings into the crankcase. This exhaust gas, containing particulate matter (PN) and water vapor, mixes with the crankcase oil mist to form a mixed gas. This mixed gas in the crankcase can cause oil deterioration and crankcase gasket leakage, so it must be discharged.

[0003] Specifically, crankcase ventilation is categorized as either "open" or "closed" depending on the ventilation method. After the exhaust mixture passes through the oil-gas separator, if the separated gas is discharged directly into the atmosphere, this ventilation method is "open." If the separated gas is not discharged directly into the atmosphere but instead enters the front end of the turbocharger to participate in the next combustion step, this ventilation method is "closed." Open ventilation offers a simple structure, is easy to deploy, and is low-cost. However, due to strict emission regulations regarding the PN value in exhaust gas, existing oil-gas separators cannot meet the requirements for handling solid particulate matter.

[0004] Therefore, it is urgent to design an oil-gas separator to improve the separation effect of solid particulate matter, so as to meet the requirements of emission regulations on PN treatment. Summary of the Invention

[0005] The object of the present invention is to provide an oil-gas separator and a vehicle to solve the problem that the oil-gas separator in the prior art has a poor separation effect on solid particles.

[0006] On the one hand, the present invention provides an oil-gas separator, which includes a shell, wherein the shell is provided with an outer cavity and an inner cavity that are interconnected, the outer cavity is connected to the air inlet and the oil outlet of the shell, and the inner cavity is connected to the air outlet and the oil outlet of the shell; a separation structure is located in the outer cavity and is used to separate the incoming fluid from the air inlet; a separation component is arranged in the inner cavity and has multiple vertical separation channels, the inlets of the separation channels are all connected to the outer cavity, and the outlets of the separation channels are all connected to the air outlet, and the separation channels are used to separate the fluid separated by the separation structure.

[0007] As an optional technical solution for the oil-gas separator, the length of the separation channel in the vertical direction is greater than or equal to 60 mm.

[0008] As an optional technical solution for the oil-gas separator, the width of the separation channel in the horizontal direction is greater than or equal to 0.05 mm.

[0009] As an optional technical solution for the oil-gas separator, the separation component includes a plurality of separation tubes which are arranged in sequence. The plurality of separation tubes are vertically arranged in the inner cavity, and a separation channel is formed between two adjacent separation tubes.

[0010] As an optional technical solution for the oil-gas separator, the separation component is made of ultra-fine glass fiber.

[0011] As an optional technical solution for the oil-gas separator, the cross-sectional shape of the separation component is cylindrical or polygonal.

[0012] As an optional technical solution for the oil-gas separator, the separation structure includes a separation plate arranged in the outer cavity, the separation plate is arranged opposite to the air inlet, and the separation plate is used to separate the fluid entering from the air inlet.

[0013] As an optional technical solution for the oil-gas separator, the oil-gas separator further includes a flattening plate, which is horizontally arranged at the air inlet and divides the air inlet into a plurality of diversion ports all connected to the external cavity.

[0014] As an optional technical solution for the oil-gas separator, the oil-gas separator also includes an inner oil return pipe arranged in the inner cavity, which is connected to the oil outlet in an on-off manner and transports the liquid on the top wall of the inner cavity to the oil outlet.

[0015] On the other hand, the present invention provides a vehicle, comprising a vehicle body and the above-mentioned oil-gas separator, wherein the oil-gas separator is installed on the vehicle body.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides an oil-gas separator, which includes a shell, a separation structure and a separation component. The shell has a separation chamber and an air inlet, an air outlet and an oil outlet connected to the separation chamber. The separation chamber has an outer chamber and an inner chamber connected to each other, the outer chamber is connected to the air inlet and the oil outlet, and the inner chamber is connected to the air outlet and the oil outlet. The separation structure is located in the outer chamber and can perform initial separation on the fluid entering from the air inlet, mainly separating large particles of engine oil in the fluid, and the separated engine oil flows to the oil outlet due to the action of gravity. The fluid after the initial separation enters the inner chamber through the outer chamber, and is secondarily separated through a plurality of vertically arranged separation channels in the separation component. Since the fluid passes through the separation channel from bottom to top, solid particles and small particles of engine oil can continuously collide with the inner wall of the separation channel when flowing through the separation channel, so that they can be fully absorbed. The separated engine oil carries solid particles and continuously condenses due to the action of gravity, and finally flows back to the oil outlet. The separation structure and vertically distributed separation channels designed in the present invention can both separate solid particles in the fluid while also taking into account the processing of small particles of engine oil, effectively solving the problem of poor solid particle separation effect of oil-gas separators in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of an oil-gas separator in an embodiment of the present invention;

[0019] Figure 2 A cross-sectional view of a partial structure of an oil-gas separator in an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the structure of the oil-gas separator in an embodiment of the present invention;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0022] In the picture:

[0023] 1. Housing; 11. Separation chamber; 111. External chamber; 112. Internal chamber; 12. Air inlet; 121. First diversion port; 122. Second diversion port; 13. Air outlet; 14. Oil outlet;

[0024] 2. Separation structure; 21. Separation plate;

[0025] 3. Separation assembly; 31. Separation channel;

[0026] 4. Stratotrac;

[0027] 5. Internal oil return pipe. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] like Figures 1 to 4As shown, this embodiment provides an oil-gas separator, which includes a housing 1, a separation structure 2 and a separation component 3. The housing 1 has a separation chamber 11 and an air inlet 12, an air outlet 13 and an oil outlet 14 connected to the separation chamber 11. The separation chamber 11 has an outer chamber 111 and an inner chamber 112 that are connected to each other. The outer chamber 111 is connected to the air inlet 12 and the oil outlet 14, and the inner chamber 112 is connected to the air outlet 13 and the oil outlet 14. The separation structure 2 is located in the outer chamber 111 and can perform initial separation on the fluid entering from the air inlet 12, mainly separating the fluid The large particles of oil in the oil are separated, and the separated oil flows to the oil outlet 14 due to the action of gravity. The fluid after the initial separation passes through the outer cavity 111 and enters the inner cavity 112, and is subjected to secondary separation through the multiple vertically arranged separation channels 31 in the separation component 3. Since the fluid passes through the separation channel 31 from bottom to top, the solid particles and small particles of oil can continuously collide with the inner wall of the separation channel 31 when flowing through the separation channel 31, so that they can be fully absorbed. The separated oil carries the solid particles and continuously condenses due to the action of gravity, and finally flows back to the oil outlet 14. The separation structure 2 and the vertically distributed separation channels 31 designed in the present invention can both separate solid particles in the fluid while taking into account the processing of small particles of oil, effectively solving the problem of poor separation effect of oil and gas separators for solid particles in the prior art.

[0033] It should be noted that harmful substances in the fluid mainly include: oil particles splashing from the crankcase and a large number of solid particles carried by the fuel gas entering the crankcase. The oil particles are micron-sized, and the solid particles are nanometer-sized.

[0034] Among them, the use of treatment methods such as centrifugal separation and inertial collision can effectively remove large particles of engine oil, but is not suitable for the treatment of nano-scale solid particles. Nano-scale solid particles form aerosols in the fluid. According to experimental research, only filtration or adsorption treatment methods can effectively separate solid particles. The present invention adopts a two-stage separation treatment method (i.e., separation structure 2 and vertically distributed separation channels 31) based on the characteristics of harmful particles in the fluid. This ensures the effective separation of the two harmful substances and minimizes the flow resistance of the fluid (i.e., crankcase pressure).

[0035] In this embodiment, the length of the separation channel 31 in the vertical direction can be set to be greater than or equal to 60 mm. In the present invention, the length of the separation channel 31 in the vertical direction can be adjusted according to the engine displacement. For example: a 4-7 liter engine can use a height of 60 mm based on test verification, and other displacement engines need to be determined based on the test conditions. Similarly, the width of the separation channel 31 in the horizontal direction can also be greater than or equal to 0.05 mm. In this embodiment, it can be adjusted according to the value of solid particulate matter entering the crankcase of the engine. If the solid particulate matter value is large, the width of the separation channel 31 in the horizontal direction needs to be made smaller. Conversely, if the solid particulate matter value is small, the width of the separation channel 31 in the horizontal direction needs to be made smaller. (The width affects the crankcase pressure. The larger the width, the lower the crankcase pressure. Therefore, it is necessary to make the width as large as possible based on the solid particulate matter value measured by the basic emission test.)

[0036] Specifically, if Figure 3 and Figure 4 As shown, the separation component 3 includes a plurality of separation tubes vertically sleeved on the inner cavity 112 in sequence. With such an arrangement, a separation channel 31 can be formed between two adjacent separation components 3, so that solid particles and small particles of engine oil can continuously collide with the inner wall of the separation channel 31 when flowing through the separation channel 31, so that they can be fully absorbed, thereby improving the separation effect of solid particles.

[0037] In this embodiment, the separation component 3 is made of ultrafine glass fiber. Ultrafine glass fiber offers excellent insulation, electrical insulation, corrosion resistance, and heat resistance. Glass fiber maintains its strength even at temperatures of 300°C. Ultrafine glass fiber is a type of glass fiber, a man-made inorganic fiber. It is made by centrifugally blowing molten glass into cotton-like microfibers with a diameter of 2.5-5 μm, along with auxiliary materials such as soda ash and borax. This is commonly known as glass wool.

[0038] Specifically, the cross-sectional shape of the separation component 3 is set to be cylindrical or polygonal. In this way, the shape of the separation component 3 can be adjusted according to actual needs.

[0039] To further enhance fluid separation, the separation structure 2 of the present invention includes a separation plate 21 disposed within the outer cavity 111. Separation plate 21 is positioned opposite the air inlet 12, allowing fluid entering through the air inlet 12 to directly impact separation plate 21. Large oil particles, separated from the air by inertia, flow downward along the wall of separation plate 21 into the oil outlet 14. The separated airflow then flows from the right side of separation plate 21 into the inner cavity 112. Separating the return oil and airflow paths prevents the return oil from being dispersed again by the airflow.

[0040] In one embodiment of the present invention, the separation plate 21 is a felt plate.

[0041] Optionally, the oil-gas separator further includes an oblique return oil passage, which is located below the separation plate 21 and opposite to the bottom of the separation plate 21 , and is communicated with the oil outlet 14 .

[0042] This makes it easier for the large particles of oil separated by the separation plate 21 to flow to the oblique return oil passage due to gravity, and then flow to the oil outlet 14 through the oblique return oil passage.

[0043] Furthermore, the oil-gas separator also includes a flattening plate 4, which is horizontally arranged at the air inlet 12. The outer edge of the flattening plate 4 is connected to the inner wall of the outer cavity 111. The flattening plate 4 can separate the air inlet 12 into multiple diversion ports, each of which is connected to the outer cavity 111. In one embodiment of the present invention, the diversion ports include a first diversion port 121 and a second diversion port 122. This arrangement allows fluid to enter the outer cavity 111 from the first diversion port 121 and the second diversion port 122 respectively, and the fluid changes from turbulent flow to laminar flow, increasing the flow rate. After the high-speed airflow hits the separation plate 21, the separation effect can be further improved.

[0044] In this embodiment, the oil-gas separator further includes an inner oil return pipe 5 disposed within the inner cavity 112, which is in on-off communication with the oil outlet 14. This arrangement allows the inner oil return pipe 5 to transport small oil particles remaining on the top wall of the inner cavity 112 to the oil outlet 14.

[0045] Optionally, the oil-gas separator further includes an oil return valve provided on the inner oil return pipe 5 , and the oil return valve controls the communication between the inner oil return pipe 5 and the oil outlet 14 .

[0046] Optionally, the oil-gas separator further includes a frame, a hoop, and a sealing rubber ring. The housing 1 includes a body and an upper cover, the upper cover being connected to the body via the hoop. The sealing rubber ring is disposed around the body to seal the body and the upper cover. The frame is disposed within the separation chamber 11 to separate the separation chamber 11 into an outer chamber 111 and an inner chamber 112 that communicate with each other. The air inlet 12 is disposed on the side wall of the body, the air outlet 13 is disposed on the upper cover, and the oil outlet 14 is disposed at the bottom of the body.

[0047] This embodiment also provides a vehicle comprising a vehicle body and the aforementioned oil-gas separator, mounted on the vehicle body. The vehicle of this embodiment can effectively separate harmful particulate matter from fluids while also processing small particles of engine oil, effectively resolving the problem of poor solid particulate matter separation in conventional vehicles.

[0048] The advantages of the present invention are as follows:

[0049] 1. Separator assembly height: The height determines the ability to handle fine oil particles and solid particulates and can be adjusted based on engine displacement. For example, a 60mm height can be used for 4-7L engines based on test verification. For engines of other displacements, the height should be determined based on test results.

[0050] 2. The gap between two adjacent separation components: The gap is also related to the solid particulate matter handling capacity and can be adjusted based on the level of solid particulate matter entering the engine crankcase. A higher solid particulate matter level results in a smaller gap, while a lower solid particulate matter level results in a larger gap. (The size of the gap affects crankcase pressure; a larger gap generally results in lower crankcase pressure. Therefore, the gap should be maximized based on the solid particulate matter level measured in the baseline emissions test.)

[0051] 3. The shape of the separation component can be cylindrical, rectangular or other irregular shapes. Its purpose is to form a certain gap between two or more vertical walls, and the mixed gas carrying solid particles will absorb the solid particles when passing through.

[0052] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An oil-gas separator, comprising a housing (1), characterized in that: include: The housing (1) is provided with an outer cavity (111) and an inner cavity (112) that are in communication with each other, the outer cavity (111) being in communication with the air inlet (12) and the oil outlet (14) of the housing, and the inner cavity (112) being in communication with the air outlet (13) and the oil outlet (14) of the housing; a separation structure (2), located in the outer cavity (111) and used for separating the fluid entering from the air inlet (12); A separation component (3) is arranged in the inner cavity (112) and has a plurality of vertical separation channels (31), the inlets of the separation channels (31) are all in communication with the outer cavity (111), the outlets of the separation channels (31) are all in communication with the gas outlet (13), and the separation channels (31) are used to separate the fluid separated by the separation structure (2); The separation assembly (3) includes a plurality of separation tubes that are arranged in sequence, and the plurality of separation tubes are vertically arranged in the inner cavity (112), and a separation channel (31) is formed between two adjacent separation tubes; the separation structure (2) includes a separation plate (21) arranged in the outer cavity (111), and the separation plate (21) is arranged opposite to the air inlet (12), and the separation plate (21) is used to separate the fluid entering from the air inlet (12).

2. The oil-gas separator according to claim 1, characterized in that: The length of the separation channel (31) in the vertical direction is greater than or equal to 60 mm.

3. The oil-gas separator according to claim 1, characterized in that: The width of the separation channel (31) in the horizontal direction is greater than or equal to 0.05 mm.

4. The oil-gas separator according to claim 1, characterized in that: The separation tube is made of ultra-fine glass fiber.

5. The oil-gas separator according to claim 1, characterized in that: The cross-section of the separation tube is cylindrical or polygonal.

6. The oil-gas separator according to claim 1, characterized in that: The oil-gas separator further comprises a flat plate (4), which is horizontally arranged at the air inlet (12), and the flat plate (4) divides the air inlet (12) into a plurality of diversion ports, all of which are in communication with the outer cavity (111).

7. The oil-gas separator according to claim 1, characterized in that: The oil-gas separator further comprises an inner oil return pipe (5) arranged in the inner cavity (112); the inner oil return pipe (5) is in on-off communication with the oil outlet (14) and is used to transport the liquid separated from the top wall of the inner cavity (112) to the oil outlet (14).

8. A vehicle, characterized in that: The invention comprises a vehicle body and the oil-gas separator according to any one of claims 1 to 7, wherein the oil-gas separator is mounted on the vehicle body.

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