Oil-gas separation device and vehicle

Abstract

The utility model provides an oil-gas separation device and a vehicle. The oil-gas separation device comprises a shell, an oil filter screen and a blade assembly, wherein the oil filter screen and the blade assembly are arranged in the shell. The shell is provided with an accommodating cavity, and an inlet and an outlet which are respectively arranged at two ends of the accommodating cavity. The oil filter screen is arranged in the containing cavity and divides the containing cavity into a first branch cavity and a second branch cavity which are communicated, the first branch cavity is close to the inlet, and the second branch cavity is close to the outlet. The blade assembly is arranged in the second sub-cavity and comprises a plurality of blades arranged on the inner wall of the second sub-cavity, the blades are sequentially arranged in the circumferential direction of the second sub-cavity, and a flowing path for gas rotating flowing is defined in the second sub-cavity. According to the oil-gas separation device disclosed by the utility model, large-particle oil drops can be intercepted by the oil filter screen, so that primary separation is realized. And then, the oil gas subjected to preliminary separation rotates through natural flowing of the gas in the blade assembly, additional motors and wire harnesses are not needed, the cost can be reduced, and the structural complexity and the fault risk can also be reduced.

Description

Technical Field

[0001] This utility model relates to the field of separation device technology, and in particular to an oil-gas separation device. It also relates to a vehicle equipped with the oil-gas separation device. Background Technology

[0002] During operation, internal combustion engines experience high temperatures and pressures within the cylinders, causing some gases to escape into the crankcase. As these escaped gases accumulate, the pressure within the crankcase continuously increases. This not only severely impacts the normal operation of the engine but also leads to a series of hazards. Firstly, the escaped gases contain a large amount of exhaust gas and engine oil. This oil is significantly lost due to the escaping, causing substantial damage to the engine, accelerating wear on engine components, and shortening its lifespan. Secondly, untreated escaped gases directly released into the atmosphere cause severe air pollution, failing to meet increasingly stringent emission standards.

[0003] To ensure effective oil-gas separation, existing oil-gas separators are often designed to be quite large, occupying significant space in the engine cylinder head and increasing the overall engine size. This makes them unsuitable for installation and use in vehicles and other equipment with limited space. Furthermore, while adding an electric motor to drive rotation typically improves oil-gas separation efficiency, this method is structurally complex, requires additional wiring harnesses, increases manufacturing costs, and also raises the probability of malfunctions. Utility Model Content

[0004] In view of this, the present invention aims to provide an oil-gas separation device to reduce manufacturing costs and achieve better oil-gas separation effect.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] An oil-gas separation device includes a housing, and an oil filter and a blade assembly disposed within the housing;

[0007] The housing is provided with a receiving cavity, and an inlet and an outlet respectively located at both ends of the receiving cavity;

[0008] The oil filter screen is disposed in the receiving cavity and divides the receiving cavity into a first sub-cavity and a second sub-cavity that are connected to each other. The first sub-cavity is close to the inlet and the second sub-cavity is close to the outlet.

[0009] The blade assembly is disposed in the second compartment and includes multiple blades disposed on the inner wall of the second compartment. The multiple blades are arranged sequentially along the circumference of the second compartment and define a flow path for gas rotation within the second compartment.

[0010] Furthermore, it also includes a valve core disposed in the second compartment, and an elastic element that abuts against the valve core;

[0011] Under the action of the elastic element, the valve core abuts against the oil filter screen and blocks part of the through holes of the oil filter screen.

[0012] Furthermore, the oil filter screen includes a middle portion and an annular portion arranged circumferentially along the middle portion;

[0013] The through hole includes a first through hole on the middle portion and a second through hole on the annular portion. Under the action of the elastic element, the valve core blocks the first through hole.

[0014] Furthermore, the valve core includes a valve core body with one end conforming to the middle portion, and a rubber gasket disposed on the valve core body;

[0015] The rubber pad has protrusions that correspond one-to-one with the first through hole, and each protrusion can be inserted into the corresponding first through hole and block the first through hole.

[0016] Furthermore, the outer peripheral wall of the rubber pad abuts against the side wall of the second cavity, and a through groove corresponding to the second through hole is provided on the outer peripheral wall of the rubber pad.

[0017] Furthermore, the second compartment is provided with a blocking structure, which blocks the blade assembly on the side near the outlet, and has a through hole for gas to pass through.

[0018] Furthermore, the blocking structure includes a central plate located in the middle of the second cavity, and connecting plates that protrude radially outward along the central plate. Multiple connecting plates are spaced circumferentially along the central plate, and each connecting plate is connected to the housing. A through hole is formed between adjacent connecting plates; and / or,

[0019] The housing is provided with a baffle located in the second compartment. The baffle is located at the end of the blocking structure near the outlet and has a vent hole.

[0020] Furthermore, the housing is cylindrical, and each blade has a profile extending circumferentially along the housing. This profile is either an inclined surface or a helical surface, and adjacent blades partially overlap in the axial direction of the housing; and / or,

[0021] The housing is provided with an annular plate located in the second compartment. The annular plate is located on the side of the blade assembly near the outlet, and one end of each blade is connected to the annular plate.

[0022] Furthermore, the inlets are a plurality of those spaced circumferentially along the housing, and the housing is provided with guide plates corresponding to each inlet, each guide plate protruding radially outward along the housing; and / or,

[0023] The housing is provided with an oil collection groove communicating with the first compartment, and an oil drain port located at the bottom of the oil collection groove.

[0024] Compared with the prior art, this utility model has the following advantages:

[0025] The oil-gas separation device of this invention, by incorporating an oil filter and a blade assembly that defines the gas rotational flow path, allows the oil filter to intercept larger oil droplets in the gas as it enters the first chamber. After initial filtration, the gas enters the second chamber and, guided by the blade assembly, begins to rotate along the flow path defined by the blades. During rotation, due to the density difference between oil and gas, centrifugal force causes remaining oil droplets to be thrown against the inner wall of the receiving chamber, achieving further oil-gas separation and thus providing a better oil-gas separation effect. This structure utilizes the natural flow of gas within the blade assembly to generate rotation, eliminating the need for additional motors and wiring harnesses. This not only reduces costs but also minimizes the structural complexity and failure risks associated with adding motors and wiring harnesses.

[0026] In addition, by setting a valve core and an elastic element, and under the action of the elastic element, the valve core blocks part of the through hole of the oil filter screen. Thus, when the pressure in the crankcase is less than a predetermined threshold, the first and second chambers can be connected only through part of the through hole; when the pressure in the crankcase is greater than the predetermined threshold, the valve core can be lifted by the gas to release the blockage of the through hole. This can meet the crankcase ventilation requirements under high engine load, maintain the relative balance of crankcase air pressure, and realize bidirectional ventilation of the crankcase under high and low loads.

[0027] Secondly, the oil filter screen includes a middle section and an annular section arranged circumferentially along the middle section. This not only facilitates the cooperation between the valve core and the oil filter screen to block the first through hole on the middle section, but also allows the second chamber to be connected to the first chamber through the second through hole on the annular section after the first through hole is blocked. This facilitates the timely discharge of oil from the second chamber to the first chamber, further reducing the oil content in the gas discharged from the oil-gas separator and effectively improving the oil-gas separation effect.

[0028] Furthermore, the valve core includes a valve core body that conforms to the middle portion at one end, and a rubber gasket on the valve core body. The rubber gasket has a protrusion that can be inserted into the first through-hole. Compared to a simple planar sealing method, this significantly enhances the sealing effect on the first through-hole. Simultaneously, the rubber gasket and protrusion maintain good elasticity and sealing performance during long-term use, reducing sealing failure caused by vibration or other factors. The contact between the outer peripheral wall of the rubber gasket and the side wall of the second chamber ensures the valve core's sealing effect on the first through-hole and maintains communication between the second chamber and the first chamber through the second through-hole.

[0029] By providing a blocking structure in the second chamber and positioning it on the side of the blade assembly near the outlet, the blocking structure can act as a secondary interceptor after the blade assembly. This provides a better capture capability for tiny oil droplets that remain in the gas after rotational separation. Compared to the case where only the blade assembly performs separation, this can further reduce the oil content in the discharged gas, improve the accuracy of the entire oil-gas separation process, and enhance the oil-gas separation effect.

[0030] The blocking structure includes a center plate and multiple connecting plates. When the oil and gas flow towards the outlet after being separated by the rotating blade assembly, the tiny oil droplets carried by the gas collide with the center plate. The oil droplets adhere to the surface of the center plate and then drip downwards under the action of gravity, which can further intercept some of the oil droplets. After the gas collides with the center plate, it changes its flow direction and passes through the through holes between the connecting plates, which can further improve the separation effect. By setting baffles on the shell, when the oil and gas continue to flow towards the outlet after passing through the through holes on the blocking structure, the oil droplets carried by the gas will more easily contact and adhere to the surface of the baffle due to inertia when the gas impacts the baffle. The gas can then continue to flow towards the outlet through the vent holes set on the baffle, which can further promote the separation of oil droplets from the gas, thereby improving the oil-gas separation effect.

[0031] Furthermore, by designing the shell as a cylinder, the circumferential force on the gas flowing within the cavity is more uniform, which helps guide the oil and gas to form an orderly rotating flow and reduces turbulence caused by irregular cavity walls. Designing the blade profile as an inclined or helical surface, and partially overlapping adjacent blades axially within the shell, allows the oil and gas to be guided by the blades through a combination of axial and circumferential motion, continuously separating oil droplets and accumulating them on the cavity wall, thus achieving a better oil-gas separation effect. The annular plate connected to each blade not only improves the stability of the blade arrangement and effectively resists the impact of oil and gas flow during long-term use, but also provides some obstruction to the oil and gas, facilitating further separation of entrained oil droplets.

[0032] In addition, designing multiple inlets spaced circumferentially along the shell allows the oil-gas mixture to enter the containment cavity from multiple different directions. On the one hand, this disperses the intake pressure, preventing oil and gas from concentrating in one place and causing unstable flow conditions such as excessively high local pressure and excessively high flow rate. On the other hand, multi-directional air intake allows the oil and gas to be more evenly distributed throughout the cavity when entering the first compartment, which helps to improve the overall uniformity of the separation process. The guide plate guides the gas into the first compartment. By setting up an oil collection tank and an oil drain, the oil droplets separated from the oil and gas can be collected effectively, preventing the oil from flowing around in the first compartment. The oil drain at the bottom can conveniently and promptly discharge the collected oil.

[0033] In addition, another objective of this utility model is to provide a vehicle equipped with the oil-gas separation device described above.

[0034] The vehicle described in this utility model has all the beneficial effects of the aforementioned oil-gas separation device, which will not be repeated here. Attached Figure Description

[0035] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0036] Figure 1 This is a schematic diagram of the structure of the oil-gas separation device described in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the oil-gas separation device described in an embodiment of the present invention from another perspective;

[0038] Figure 3 for Figure 2 Sectional view of line AA in the middle;

[0039] Figure 4 for Figure 3 Enlarged view of section B;

[0040] Figure 5 This is a schematic diagram of the structure of the first shell and the guide plate according to an embodiment of the present utility model;

[0041] Figure 6 for Figure 5 A cross-sectional view of the structure shown;

[0042] Figure 7 This is a schematic diagram of the structure of the oil filter screen according to an embodiment of the present invention;

[0043] Figure 8 This is a cross-sectional view of the oil filter screen described in an embodiment of the present invention;

[0044] Figure 9 This is a schematic diagram of the structure of the second shell and blade assembly described in an embodiment of the present invention;

[0045] Figure 10 for Figure 9 A schematic diagram of the structure shown from another perspective;

[0046] Figure 11 for Figure 10 A cross-sectional view of the CC line;

[0047] Figure 12 This is a schematic diagram of the third shell and blocking structure described in an embodiment of the present utility model;

[0048] Figure 13 for Figure 12 A schematic diagram of the structure shown from another perspective;

[0049] Figure 14 for Figure 12 A cross-sectional view of the structure shown;

[0050] Figure 15 This is a schematic diagram of the valve core structure described in an embodiment of the present utility model;

[0051] Figure 16 This is a schematic diagram of the valve core described in an embodiment of the present invention from another perspective;

[0052] Figure 17 This is a structural schematic diagram of the valve core described in an embodiment of the present invention from another perspective;

[0053] Figure 18 This is a cross-sectional view of the valve core described in an embodiment of the present utility model;

[0054] Figure 19 This is a schematic diagram of the valve core body according to an embodiment of the present utility model;

[0055] Figure 20 This is a schematic diagram of the fourth shell structure described in an embodiment of the present utility model;

[0056] Figure 21 This is a schematic diagram of the fourth shell described in an embodiment of the present invention from another perspective;

[0057] Figure 22 This is a cross-sectional view of the fourth shell as described in this embodiment of the present invention;

[0058] Figure 23 This describes the gas flow path of the oil-gas separation device described in this embodiment of the invention under high load.

[0059] Figure 24 This describes the gas flow path of the oil-gas separation device described in this embodiment of the invention under low load.

[0060] Explanation of reference numerals in the attached figures:

[0061] 1. Housing; 2. Guide plate; 3. Oil filter; 4. Valve core; 5. Blade; 6. Blocking structure; 7. Corrugated spring; 8. Annular plate; 9. Baffle; P, Inlet; Q, Outlet; M, First chamber; N, Second chamber; K, Mounting groove; S, Profile;

[0062] 101. First casing; 1011. Oil collection tank; 1012. Oil drain port; 102. Second casing; 103. Third casing; 104. Fourth casing;

[0063] 301, Middle section; 3011, First via; 302, Annular section; 3021, Second via;

[0064] 401. Valve core body; 402. Rubber gasket; 4021. Protrusion; 4022. Through groove;

[0065] 601, Center Plate; 6011, Connecting Cylinder; 602, Connecting Plate;

[0066] 901. Vent. Detailed Implementation

[0067] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0068] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0069] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0070] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0071] Given that existing technologies typically require adding a motor to drive rotation to improve oil-gas separation efficiency, resulting in complex structures and the need for separate wiring harnesses, which not only increases manufacturing costs but also raises the probability of malfunctions, this embodiment proposes a novel oil-gas separation device, including a housing 1, and an oil filter 3 and a blade assembly disposed within the housing 1.

[0072] The housing 1 has a receiving cavity, with an inlet P and an outlet Q located at opposite ends of the cavity. An oil filter 3 is disposed within the receiving cavity, dividing it into a first sub-cavity M and a second sub-cavity N that are connected. The first sub-cavity M is located near the inlet P, and the second sub-cavity N is located near the outlet Q. A blade assembly is disposed within the second sub-cavity N and includes multiple blades 5 mounted on the inner wall of the second sub-cavity N. The multiple blades 5 are arranged sequentially along the circumference of the second sub-cavity N, defining a flow path for the rotating gas flow within the second sub-cavity N.

[0073] The oil-gas separation device of this embodiment, by setting an oil filter 3 to divide the receiving cavity into a first chamber M and a second chamber N, and a blade assembly disposed in the second chamber N, allows for preliminary separation of the oil and gas mixture after it enters the first chamber M. This separation is achieved by relying on the difference in density and flowability between the oil droplets and the gas, causing larger oil droplets to be intercepted by the oil filter 3. Then, after preliminary separation, the oil and gas enter the second chamber N, where the gas begins to rotate and flow along the circumferential flow path defined by the blades 5 under the action of the blade assembly. Due to the density difference between the oil and gas, the remaining oil droplets are thrown against the inner wall of the receiving cavity and flow downwards under the centrifugal force generated by the rotation, achieving further separation from the gas. Therefore, it can achieve a better separation effect. Moreover, the oil-gas separation device of this embodiment utilizes the natural flow of gas in the blade assembly to generate rotation, eliminating the need for additional motors and wiring harnesses. This not only reduces costs but also minimizes the structural complexity and failure risks associated with adding motors and wiring harnesses.

[0074] Based on the above overview, an exemplary structure of the oil-gas separation device in this embodiment is described below. Figures 1 to 4 As shown, the shell 1 is cylindrical in shape. This shell 1 structure provides a uniform flow field environment for oil and gas, resulting in a relatively uniform distribution of resistance in the circumferential direction after the oil and gas enter the containment cavity. This facilitates the formation of an orderly rotating flow of oil and gas and reduces turbulence caused by irregular cavity walls. It is understandable that, besides making the shell 1 cylindrical, making it rectangular or other shapes is also feasible, but this would obviously reduce the oil-gas separation effect.

[0075] Furthermore, as a further implementation method, such as Figure 3As shown, the oil-gas separation device of this embodiment also includes a valve core 4 disposed in the second chamber N, and an elastic member that abuts against the valve core 4. Furthermore, under the action of the elastic member, the valve core 4 abuts against the oil filter screen 3 and blocks part of the through holes of the oil filter screen 3.

[0076] In this embodiment, by setting a valve core 4 and an elastic element, and utilizing the elastic force of the elastic element, the valve core 4 can block part of the through-holes of the oil filter screen 3. Therefore, when the pressure inside the crankcase is less than a predetermined threshold, the connection between the first chamber M and the second chamber N can be maintained only through the unblocked through-holes. However, when the engine is under high load, and the pressure inside the crankcase exceeds the predetermined threshold, the high-pressure gas from the crankcase acts on the valve core 4, overcoming the elastic force of the elastic element, thereby lifting the valve core 4 and releasing the blockage of the through-holes. At this time, the oil-gas mixture can pass more smoothly through the oil filter screen 3 and quickly flow from the first chamber M to the second chamber N, meeting the crankcase ventilation requirements under high engine load, maintaining a relative balance of crankcase pressure, and achieving bidirectional ventilation of the crankcase under both high and low loads.

[0077] To facilitate understanding of this embodiment, the structure of the housing 1 will be described first. As a specific embodiment, for ease of design and manufacturing, such as Figure 3 As shown, the housing 1 in this embodiment includes a first sub-shell 101, a second sub-shell 102, a third sub-shell 103, and a fourth sub-shell 104 arranged sequentially from bottom to top. Furthermore, adjacent sub-shells can be welded together or interference-fitted together. In a further embodiment, multiple inlets P are spaced apart circumferentially along the housing 1, and the housing 1 is provided with guide plates 2 corresponding to each inlet P, with each guide plate 2 protruding radially outward from the housing 1.

[0078] By designing multiple inlets P spaced circumferentially along the shell 1, the oil-gas mixture can enter the receiving cavity from multiple different directions. This disperses the intake pressure, preventing oil and gas from concentrating in one spot and causing unstable flow conditions such as excessively high local pressure and flow rate. It also improves the uniformity of contact between different parts of the oil filter screen 3, thereby enhancing the oil-gas separation effect. Furthermore, multi-directional air intake allows the oil and gas to be more evenly distributed throughout the first chamber M upon entry, improving the overall uniformity of the separation process. The guide plate 2 guides the oil and gas flow, facilitating a more orderly entry into the first chamber M.

[0079] In one specific embodiment, combined with Figure 5 and Figure 6As shown, in this embodiment, the inlet P and the guide plate 2 are specifically disposed on the first housing 101, and four are evenly distributed along the circumference of the first housing 101. Furthermore, as a preferred embodiment, the inlet P is generally rectangular, and the guide plate 2 has a bottom plate connected to the bottom wall of the inlet P, and side plates connected to the two side walls of the inlet P. Additionally, as... Figure 6 As shown, the bottom plate of the guide plate 2 is inclined to better guide the oil-gas mixture into the first compartment M.

[0080] It should be noted here that the quantity and shape of the inlet P and the guide plate 2 are not limited to... Figure 5 As shown, it can be adjusted accordingly based on design requirements.

[0081] As another implementation method, such as Figure 5 and Figure 6 As shown, the housing 1, i.e., the first sub-housing 101, is provided with an oil collecting groove 1011 communicating with the first sub-cavity M, and an oil drain port 1012 located at the bottom of the oil collecting groove 1011. The oil collecting groove 1011 effectively collects oil droplets separated from the oil vapor, preventing oil from flowing freely within the first sub-cavity M. The oil drain port 1012 at the bottom allows for convenient and timely discharge of the collected oil. Furthermore, as a preferred embodiment, such as... Figure 6 As shown, the oil collection tank 1011 is a tapered shape that gradually narrows at the bottom. This design allows the separated oil droplets to flow gradually to the bottom along the inclined wall, which can more effectively prevent the oil droplets from accumulating in the oil collection tank 1011 and facilitate timely discharge through the oil drain port 1012.

[0082] In addition, such as Figure 3 As shown, the oil filter 3 is specifically disposed at the connection between the second housing 102 and the third housing 103, and the oil filter 3 is circular and conforms to the shape of the housing 1. Furthermore, as... Figure 7 and Figure 8 As shown in the figure, in a preferred embodiment, the oil filter 3 of this embodiment includes a middle portion 301 and an annular portion 302 arranged circumferentially along the middle portion 301. The aforementioned through holes specifically include a first through hole 3011 provided on the middle portion 301 and a second through hole 3021 provided on the annular portion 302. Under the action of the elastic member, the valve core 4 blocks the first through hole 3011.

[0083] This structure not only facilitates the cooperation between the valve core 4 and the oil filter screen 3 to seal the first through hole 3011 on the intermediate part 301, but also allows the second chamber N to remain connected through the second through hole 3021 on the annular part 302 after the first through hole 3011 is sealed. This facilitates the timely discharge of oil from the second chamber N into the first chamber M, further reducing the oil content in the gas discharged from the oil-gas separator and effectively improving the oil-gas separation effect.

[0084] More specifically, in order to facilitate the entry of oil or gas from the second chamber N into the first through hole 3011 through the second through hole 3021 when the valve core 4 blocks the first through hole 3011, as a preferred embodiment, such as... Figure 8 In the middle section 301, the central part is arched towards the second sub-cavity N. This structure also increases the contact area between the oil filter screen 3 and the oil-gas mixture, improving the filtration effect and giving the oil filter screen 3 better structural strength, effectively resisting the impact of the oil-gas mixture.

[0085] In addition, such as Figure 7 As shown, the annular portion 302 of this embodiment has an extension portion extending into the second cavity N, and this extension portion abuts against the inner walls of the first housing 101 and the second housing 102, forming a portion of the inner wall of the second receiving cavity. This arrangement not only improves the structural strength of the oil filter screen 3, but also facilitates its placement between the first housing 101 and the second housing 102. Furthermore, as a preferred embodiment, such as... Figure 7 As shown in the figure, in this embodiment, the second through holes 3021 are multiple holes spaced apart circumferentially along the annular portion 302, and preferably evenly distributed. The advantage of this design is that it helps to maintain the stability of the flow of oil and gas on the oil filter screen 3, avoids uneven impact force on the oil filter screen 3, and also facilitates the timely flow of oil from various parts in the second compartment N into the first compartment M, and then discharges it through the oil collection groove 1011.

[0086] Combination Figure 3 , Figures 9 to 11 In this embodiment, the blade assembly is specifically located within the second housing 102, and the number of blades 5 is not specifically limited; it can be adjusted according to design requirements. Furthermore, each blade 5 has a profile S extending circumferentially along the housing 1. The profile S can be an inclined surface or a helical surface, and adjacent blades 5 partially overlap axially with each other in the housing 1. With this configuration, when oil and gas enter the second chamber N, the gas flows along the inclined or helical surface of the blades 5, possessing an axial velocity component and a continuous circumferential rotational force. This guides the gas to have reasonable velocity components in both the axial and circumferential directions, promoting better separation of oil droplets from the gas under the combined action of centrifugal force and axial flow.

[0087] Furthermore, the partial overlap of two adjacent blades 5 along the axial direction of the housing 1 effectively prevents gas from passing directly through the blade assembly without sufficient rotation. This partial overlap forces the gas to rotate and flow a longer distance along the profile S of the blade 5, giving oil droplets more opportunities to be thrown against the inner wall of the containment cavity under centrifugal force, thus improving the oil-gas separation effect.

[0088] In addition, combined Figure 3 , Figure 10 and Figure 11 As shown, an annular plate 8 is provided on the housing 1, i.e., the second housing 102, within the second cavity N. This annular plate 8 is located on the side of the blade assembly near the outlet Q, and one end of each blade 5 is connected to the annular plate 8. In this embodiment, by providing the annular plate 8, the structural stability of the blade assembly can be improved, effectively resisting the impact of oil and gas flow during long-term use. Furthermore, when the oil and gas are rotated and separated under the guidance of the blades 5, as the gas passes through the annular plate 8, due to the blocking and guiding effect of the annular plate 8, oil droplets can impact the surface of the annular plate 8 due to inertia, thus accumulating and dripping, further reducing the oil content in the discharged gas and improving the final separation efficiency of the entire oil-gas separation device.

[0089] In this embodiment, as a further implementation method, such as Figure 3 As shown, a blocking structure 6 is provided in the second chamber N. The blocking structure 6 is positioned on the side of the blade assembly near the outlet Q, and has a through hole for gas to pass through. By setting the blocking structure 6, after the oil-gas mixture passes through the rotating separation of the blade assembly, most of the oil droplets are thrown towards the inner wall of the receiving chamber and converge downwards under the action of centrifugal force. However, some tiny oil droplets may still continue to flow towards the outlet Q with the gas. At this time, the blocking structure 6 can play a secondary interception role. When these tiny oil droplets carried by the gas collide with the surface of the blocking structure 6, they easily adhere to the blocking structure 6 due to their own inertia, while the gas can continue to move forward through the through hole, thereby achieving the purpose of further separating oil and gas and effectively reducing the oil content in the discharged gas.

[0090] Among them, combined Figure 3 , Figures 5 to 14As shown, the blocking structure 6 in this embodiment is specifically disposed in the third housing 103, and includes a central plate 601 located in the middle of the second cavity N, and connecting plates 602 that protrude radially outward along the central plate 601. Multiple connecting plates 602 are spaced apart circumferentially along the central plate 601, and each connecting plate 602 is connected to the housing 1. Through holes are formed between adjacent connecting plates 602. With this configuration, when the oil and gas separated by the rotating blade assembly flows towards the outlet Q, the tiny oil droplets that are not separated in the gas collide with the central plate 601. Due to the inertia of the oil droplets and the obstruction of their movement by the central plate 601, the oil droplets adhere to the surface of the central plate 601 and then drip downwards under gravity, further intercepting some of the oil droplets and improving the oil-gas separation effect.

[0091] The connecting plates 602, spaced circumferentially along the central plate 601 and protruding radially outward, serve two purposes: firstly, they connect the central plate 601 to the housing 1, ensuring the entire blocking structure 6 is securely installed within the second cavity N; secondly, the through holes formed by adjacent connecting plates 602 become channels for continued gas flow. When gas impacts the central plate 601, it changes direction and passes through the through holes between the connecting plates 602. Oil droplets, due to their inertia, cannot quickly change direction and pass through the through holes, thus being further separated. The shape of the blocking structure 6 is not limited to... Figure 12 As shown in the figure, it can be adjusted according to design requirements, and the number of connecting plates 602 is not limited to that shown in the figure, and can be adjusted according to design requirements.

[0092] At this time, in order to facilitate the setting of valve core 4, combined with Figure 13 and Figure 14 As shown, in a further embodiment, a recessed groove is formed on the center plate 601, extending towards the outlet Q. Simultaneously, a connecting cylinder 6011 corresponding to the groove is provided on the center plate 601, and this connecting cylinder 6011 and the groove form a mounting groove K. Furthermore, one end of each of the aforementioned connecting plates 602 is connected to the connecting cylinder 6011, while the other end is connected to the third housing 103. Additionally, as... Figure 4 As shown, the aforementioned elastic element is specifically a corrugated spring 7 disposed within the mounting groove K.

[0093] Due to the special structure of the bellows spring 7, it can provide sufficient elastic force in a relatively small space in the axial direction, achieving effective control of the valve core 4 without occupying too much space. This is beneficial for the miniaturization and compact design of the device, further reducing the overall volume of the oil-gas separator and facilitating its layout. It should be noted that, in addition to the bellows spring 7, other springs such as helical springs can also be used as the elastic element.

[0094] In addition, such as Figure 4As shown, the inner surface of the connecting cylinder is a conical surface with a gradually increasing cross-section along the direction away from the groove, so as to lubricate the corrugated spring 7 and extend its service life. In one specific embodiment, the taper of the inner surface of the connecting cylinder can be set between 1.5° and 2.5°, for example, 2°, or other values.

[0095] At this time, in order to facilitate contact with the corrugated spring 7 in the mounting groove K, as a preferred embodiment, combined with Figures 15 to 19 As shown, the valve core 4 in this embodiment includes a valve core body 401 with one end conforming to the middle portion 301, and a rubber gasket 402 disposed on the valve core body 401. Furthermore, the rubber gasket 402 has protrusions 4021 corresponding one-to-one with the first through holes 3011, each protrusion 4021 being able to be inserted into the corresponding first through hole 3011 and seal the first through hole 3011. Wherein, as... Figure 19 As shown, one end of the valve core body 401 conforms to the middle portion 301, and the other end is provided in the insert rod inserted into the mounting groove K and abutting against the bellows spring 7. The rubber gasket 402 is specifically sleeved on the end of the valve core body 401 that conforms to the middle portion 301, and can be vulcanized and connected to the valve core body 401.

[0096] In this embodiment, the valve core 4, by providing a protrusion 4021 on the rubber gasket 402, utilizes the elasticity of the rubber gasket 402 itself to ensure that the protrusion 4021, after being inserted into the first through hole 3011, can tightly fit against the inner wall of the first through hole 3011, forming a good sealing effect. Compared to the method of sealing by simply relying on planar contact, this insertion-type cooperation between the protrusion 4021 and the first through hole 3011 can better prevent oil and gas leakage, minimize the possibility of oil and gas passing through the first through hole 3011, and ensure that the flow path and state of oil and gas on the oil filter screen 3 can be more precisely controlled, further ensuring the effect of oil and gas separation.

[0097] Obviously, besides providing a protrusion 4021 on the rubber gasket 402, it is also feasible to seal the first through hole 3011 through one end of the rubber gasket 402. Alternatively, besides fitting the rubber gasket 402 onto one end of the valve core body 401, it is also feasible to place it only on the end face of the valve core body 401 that abuts against the oil filter screen 3. Furthermore, even without the rubber gasket 402, it is feasible to have the valve core body 401 directly abut against the oil filter screen 3, but this would obviously reduce the sealing effect on the first through hole 3011.

[0098] Based on the above-described structure of the adhesive pad 402, as a further embodiment, combined with... Figure 3 and Figure 15As shown, the outer peripheral wall of the rubber pad 402 abuts against the side wall of the second sub-cavity N, and a through groove 4022 corresponding to the second through hole 3021 is provided on the outer peripheral wall of the rubber pad 402. This design can ensure the sealing effect of the valve core 4 on the first through hole 3011, and can maintain the communication between the second sub-cavity N and the first sub-cavity M through the second through hole 3021.

[0099] In addition, such as Figure 3 As shown, in a further embodiment, the housing 1 is provided with a baffle 9 located within the second cavity N. The baffle 9 is located at the end of the blocking structure 6 near the outlet Q, and a vent 901 is provided on the baffle 9. In a preferred embodiment, combined with... Figures 20 to 22 As shown, in this embodiment, the baffle 9 is specifically disposed on the fourth housing 104, and the aforementioned outlet Q is also formed on the fourth housing 104. Furthermore, the fourth housing 104 is generally shaped like an inverted funnel to better guide gas out of the outlet Q. Figure 22 As shown, to further facilitate gas discharge, the vent 901 on the baffle 9 is set to correspond to the outlet Q.

[0100] After the oil and gas pass through the blocking structure 6, although most of the oil droplets have been separated, a very small amount of tiny oil droplets may still remain and continue to flow towards the outlet Q with the gas. At this time, the baffle 9 with vent holes 901 plays an important interception role. When the gas carrying the unseparated tiny oil droplets collides with the baffle 9, due to the large inertia of the oil droplets, they easily adhere to the surface of the baffle 9, while the gas can continue to flow towards the outlet Q through the vent holes 901 on the baffle 9. This achieves another separation of the oil droplets, which can further reduce the oil content in the discharged gas and improve the final separation effect of the entire oil-gas separation device.

[0101] Based on the above overview, the oil-gas separation device of this embodiment forms a four-stage oil-gas separation structure through the oil filter screen 3, blade assembly, blocking structure 6, and baffle 9 arranged sequentially along its axial direction. When the oil-gas mixture enters the receiving chamber from the inlet P, it first undergoes preliminary separation by the oil filter screen 3 in the first dividing chamber M, where some oil droplets are intercepted. Then, it enters the second dividing chamber N, where the oil and gas are further separated by the centrifugal force of the blade assembly. Subsequently, through the layered interception of components such as the blocking structure 6 and baffle 9, and the optimization of gas flow, the oil content in the discharged gas is continuously reduced, and finally, relatively pure gas is discharged from the outlet Q, while the separated oil is collected through the oil collection tank 1011 and discharged from the oil outlet 1012.

[0102] Therefore, the oil-gas separator in this embodiment occupies less axial space, possessing advantages such as compact and reasonable structure, small size, and good oil-gas separation effect. It can effectively meet the oil-gas separation requirements of engines and other equipment, while also enabling bidirectional ventilation of the crankcase under both high and low loads. Furthermore, the gas flow path under high load is as follows... Figure 23 As shown by the middle arrow, the gas flow path under low load is as follows: Figure 24 As indicated by the middle arrow.

[0103] In addition, this embodiment also relates to a vehicle equipped with the oil-gas separation device described above.

[0104] In this embodiment, the vehicle is equipped with the aforementioned oil-gas separator, which has a good oil-gas separation effect, reducing oil loss and thus reducing damage to the engine. Moreover, the oil-gas separator occupies little space, which is beneficial for the arrangement of other vehicle components.

[0105] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oil-gas separation device, characterized in that: Includes a housing (1), and an oil filter (3) and a blade assembly disposed within the housing (1); The housing (1) is provided with a receiving cavity, and an inlet (P) and an outlet (Q) respectively located at both ends of the receiving cavity; The oil filter (3) is disposed in the receiving cavity and divides the receiving cavity into a first sub-cavity (M) and a second sub-cavity (N) that are connected to each other. The first sub-cavity (M) is close to the inlet (P) and the second sub-cavity (N) is close to the outlet (Q). The blade assembly is disposed in the second compartment (N) and includes a plurality of blades (5) disposed on the inner wall of the second compartment (N). The plurality of blades (5) are arranged sequentially along the circumference of the second compartment (N) and define a flow path for gas rotation within the second compartment (N).

2. The oil-gas separation device according to claim 1, characterized in that: It also includes a valve core (4) disposed in the second compartment (N), and an elastic member abutting against the valve core (4); Under the action of the elastic element, the valve core (4) abuts against the oil filter screen (3) and blocks part of the through holes of the oil filter screen (3).

3. The oil-gas separation device according to claim 2, characterized in that: The oil filter (3) includes a middle portion (301) and an annular portion (302) arranged circumferentially along the middle portion (301); The via includes a first via (3011) provided on the middle portion (301) and a second via (3021) provided on the annular portion (302). Under the action of the elastic member, the valve core (4) blocks the first via (3011).

4. The oil-gas separation device according to claim 3, characterized in that: The valve core (4) includes a valve core body (401) with one end conforming to the middle portion (301), and a rubber pad (402) disposed on the valve core body (401); The rubber pad (402) has protrusions (4021) that correspond one-to-one with the first through hole (3011). Each protrusion (4021) can be inserted into the corresponding first through hole (3011) and block the first through hole (3011).

5. The oil-gas separation device according to claim 4, characterized in that: The outer peripheral wall of the rubber pad (402) abuts against the side wall of the second cavity (N), and a through groove (4022) corresponding to the second through hole (3021) is provided on the outer peripheral wall of the rubber pad (402).

6. The oil-gas separation device according to claim 1, characterized in that: The second compartment (N) is provided with a blocking structure (6), which blocks the blade assembly on the side near the outlet (Q), and has a through hole for gas to pass through.

7. The oil-gas separation device according to claim 6, characterized in that: The blocking structure (6) includes a central plate (601) located in the middle of the second cavity (N), and connecting plates (602) that protrude radially outward along the central plate (601). Multiple connecting plates (602) are spaced apart circumferentially along the central plate (601), and each connecting plate (602) is connected to the housing (1). A through hole is formed between adjacent connecting plates (602); and / or, The housing (1) is provided with a baffle (9) located in the second compartment (N). The baffle (9) is located at one end of the blocking structure (6) near the outlet (Q) and has a vent hole (901).

8. The oil-gas separation device according to any one of claims 1 to 7, characterized in that: The housing (1) is cylindrical, and each blade (5) has a profile (S) extending circumferentially along the housing (1). The profile (S) is an inclined surface or a helical surface, and two adjacent blades (5) partially overlap in the axial direction of the housing (1). And / or, The housing (1) is provided with an annular plate (8) located in the second compartment (N). The annular plate (8) is located on the side of the blade assembly near the outlet (Q). One end of each blade (5) is connected to the annular plate (8).

9. The oil-gas separation device according to any one of claims 1 to 7, characterized in that: The inlets (P) are a plurality of those spaced circumferentially along the housing (1), and the housing (1) is provided with guide disks (2) corresponding one-to-one with the inlets (P), each guide disk (2) being radially protruding outward along the housing (1); and / or, The housing (1) is provided with an oil collection trough (1011) communicating with the first compartment (M) and an oil drain port (1012) located at the bottom of the oil collection trough (1011).

10. A vehicle, characterized in that: The vehicle is equipped with an oil-gas separation device as described in any one of claims 1 to 9.

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