Oil-gas separator with impeller structure

Abstract

The oil-gas separator with the impeller structure comprises a shell and a bottom plate, an oil-gas separation cavity is formed between the shell and the bottom plate, and a first impact plate and a second impact plate are arranged in the oil-gas separation cavity; the first impact plate and the second impact plate divide the oil-gas separation cavity into a first-stage separation cavity, a second-stage separation cavity and a third-stage separation cavity which are communicated in sequence; a labyrinth type air inlet channel is arranged in the first-stage separation cavity, an impeller coarse separation assembly is arranged in the second-stage separation cavity, and a fiber cotton fine separation assembly is arranged in the third-stage separation cavity. The impact plate, the impeller coarse separation assembly and the cellucotton fine separation assembly are integrated, the oil-gas separation effect can be effectively improved, the manufacturing cost is reduced, meanwhile, the compactness of the whole machine is improved, and the oil pumping risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an oil-gas separator with an impeller structure. Background Art

[0002] During the operation of the automobile engine, combustible mixture and exhaust gas will enter the crankcase. Blow-by gas will dissolve in the engine oil and dilute the oil, making the oil performance worse. Pollutants such as particles contained in the exhaust gas will mix with the oil, causing the oil to deteriorate and corrode parts. At the same time, the engine generates heat when it is running, and the oil evaporates, increasing the internal pressure of the crankcase. The oil will seep out from the oil seal of the crankcase, resulting in excessive oil consumption. The steam generated by the evaporation of the oil will also pollute the atmosphere. Therefore, the engine needs to be designed with a crankcase ventilation system to remove crankcase blow-by gas, prevent oil deterioration, reduce oil consumption, and reduce pollutant emissions.

[0003] At present, the oil-gas separators in the engine crankcase ventilation system are mainly divided into active types and passive types such as collision type and cyclone type. For active oil-gas separators, the oil mist separation body mainly refers to the blades that can rotate at high speed; for passive oil-gas separators, the oil mist separation body includes serpentine flow channels, filtering devices, etc.

[0004] However, the existing oil-gas separators still have the following technical defects: when the oil-gas separation structure is simple, it has the advantages of convenient processing and manufacturing and low cost, but the oil-gas separation effect is poor; when the oil-gas separation structure is complex, it has the advantages of relatively good oil-gas separation effect, but there are problems such as inconvenient processing and manufacturing and high cost. In other words, it is difficult for the oil-gas separators of the prior art to achieve a balance between cost and separation effect. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides an oil-gas separator with an impeller structure, which can improve the separation effect of the oil-gas separator while reducing the manufacturing cost.

[0006] An oil-gas separator with an impeller structure provided by an embodiment of the utility model comprises a shell and a bottom plate fixedly mounted on the bottom of the shell, an oil-gas separation chamber is formed between the shell and the bottom plate, an air inlet connected to the oil-gas separation chamber is arranged at one end of the bottom plate, and an air outlet connected to the oil-gas separation chamber is arranged at the other end of the shell; a first impact plate and a second impact plate are sequentially arranged in the oil-gas separation chamber along the flow direction of the oil-gas mixture, and the first impact plate and the second impact plate separate the oil-gas separation chamber into a primary separation chamber, a secondary separation chamber and a tertiary separation chamber which are sequentially connected;

[0007] The first-stage separation chamber is divided by an air intake partition to form a labyrinth-type air intake passage connected to the air intake port; the second-stage separation chamber is provided with an impeller rough separation component, and the impeller rough separation component and the first impact plate and the second impact plate on both sides thereof jointly form a centrifugal oil-gas rough separation structure; the third-stage separation chamber is provided with a fiber-cotton-fine separation component, and the air outlet is provided on the air outlet side of the fiber-cotton-fine separation component;

[0008] A coarse separation oil return groove and a fine separation oil return groove with an oil outlet at the bottom are arranged on the bottom plate. The coarse separation oil return groove is connected to the secondary separation chamber and the air inlet side fluid of the fiber-cotton fine separation component, and the fine separation return oil groove is connected to the air outlet side fluid of the fiber-cotton fine separation component.

[0009] Optionally, the impeller coarse separation assembly includes a rotating impeller and two mounting brackets for mounting the rotating impeller; a rotating shaft is fixedly arranged at the axis of the rotating impeller, and the length direction of the rotating shaft is consistent with the length direction of the first impact plate and the second impact plate; the two mounting brackets are relatively arranged at both ends of the rotating shaft, and the two ends of the rotating shaft are respectively rotatably connected to the corresponding mounting brackets.

[0010] Optionally, the rotating shaft is integrally formed with the rotating impeller through a pre-embedded injection molding process.

[0011] Optionally, the lower end of the mounting bracket is fixedly connected to the base plate, the upper end of the mounting bracket is provided with an elastic buckle, and the rotating shaft is rotatably inserted into the elastic buckle.

[0012] Optionally, a plurality of longitudinal ribs with a V-shaped cross section are provided on the side of the first impact plate and the second impact plate facing the rotating impeller.

[0013] Optionally, the shell and the base plate are fixedly connected by a vibration friction welding process.

[0014] Optionally, the fiber cotton fine separation component comprises a fine separation partition provided with a fiber cotton filtering structure, and the fine separation partition is fixedly arranged between the coarse separation return oil tank and the fine separation return oil tank.

[0015] Optionally, an oil return umbrella valve is installed at the oil outlet of the fine separation oil return tank.

[0016] Optionally, the lower end of the first impact plate is fixedly connected to the base plate, and a gap is provided between the upper end of the first impact plate and the shell for the oil-gas mixture to flow; the upper end of the second impact plate is fixedly connected to the shell, and a gap is provided between the lower end of the second impact plate and the base plate for the oil-gas mixture to flow.

[0017] The embodiments of the utility model have the following beneficial effects: an impeller coarse separation component is arranged between the first impact plate and the second impact plate, which integrates the impact plate, the impeller coarse separation component and the fiber cotton fine separation component into one, can effectively improve the oil-gas separation effect, reduce the manufacturing cost, and at the same time increase the compactness of the whole machine and reduce the risk of oil blowby; the rotating impeller in the impeller coarse separation component can rotate under the flow impact of the oil-gas mixture, and the oil droplets adsorbed on the rotating impeller are quickly thrown out by the centrifugal force generated by the rotation, and the thrown oil droplets fall on the impact plate and flow into the coarse separation oil return tank along the impact plate under the action of gravity, which can further improve the oil-gas separation efficiency during the coarse separation process, thereby improving the oil-gas separation effect. At the same time, the overall structure of the impeller coarse separation component is relatively simple, and has the advantages of convenient processing and manufacturing and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0020] Figure 2 It is a cross-sectional view of an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the impeller rough separation assembly in the embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the mounting bracket in the embodiment of the utility model;

[0023] The numbers in the figure represent:

[0024] 1. Shell; 2. Bottom plate; 3. Air inlet; 4. Air outlet; 5. First impact plate; 6. Second impact plate; 7. Primary separation chamber; 8. Secondary separation chamber; 9. Tertiary separation chamber; 10. Air inlet baffle; 11. Rotating impeller; 12. Mounting bracket; 13. Rotating shaft; 14. Elastic buckle; 15. Coarse separation return oil groove; 16. Longitudinal rib; 17. Fine separation return oil groove; 18. Oil return umbrella valve; 19. Fiber cotton filter structure; 20. Fine separation baffle. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0026] In the present invention, unless otherwise stated, the directional words used, such as "upper" and "lower", etc., generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. In addition, the terms "first", "second", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more features.

[0027] See also Figure 1 , Figure 2 As shown, an embodiment of the utility model provides an oil-gas separator with an impeller structure, including a shell 1 and a base plate 2, the base plate 2 is fixedly installed on the bottom of the shell 1 by a vibration friction welding process, an oil-gas separation chamber is formed between the shell 1 and the base plate 2, one end of the base plate 2 is provided with an air inlet 3 connected to the oil-gas separation chamber, and the other end of the shell 1 is provided with an air outlet 4 connected to the oil-gas separation chamber, the oil-gas mixture can enter the oil-gas separation chamber from the air inlet 3, and be discharged from the air outlet 4 after oil-gas separation treatment in the oil-gas separation chamber.

[0028] Specifically, a first impact plate 5 and a second impact plate 6 are sequentially arranged in the oil-gas separation chamber along the flow direction of the oil-gas mixture (i.e., the direction from the air inlet 3 to the air outlet 4), and the first impact plate 5 and the second impact plate 6 can separate the oil-gas separation chamber into a primary separation chamber 7, a secondary separation chamber 8, and a tertiary separation chamber 9 that are sequentially connected. Further, in the embodiment of the utility model, the lower end of the first impact plate 5 is fixedly connected to the bottom plate 2, and a gap is provided between the upper end of the first impact plate 5 and the shell 1 for the oil-gas mixture to flow, and the upper end of the second impact plate 6 is fixedly connected to the shell 1, and a gap is provided between the lower end of the second impact plate 6 and the bottom plate 2 for the oil-gas mixture to flow, so as to form a serpentine airflow channel.

[0029] Among them, a labyrinth-like air intake passage is formed in the first-stage separation chamber 7 by dividing it with the air intake baffle 10, and the air intake passage is connected with the air intake port 3, and the oil-gas mixture can enter the air intake passage from the air intake port 3, and flow into the first-stage separation chamber 7 along the air intake passage; during the flow process, the oil-gas mixture collides with the air intake baffle 10 and the inner wall of the first-stage separation chamber 7, so that some oil droplets carried in the oil-gas mixture are blocked and separated, and the separated oil droplets can flow downward into the air intake port 3 along the air intake baffle 10 and the inner wall of the first-stage separation chamber 7 under the action of gravity, and reflux through the air intake port 3.

[0030] The secondary separation chamber 8 is provided with an impeller rough separation assembly, which can form a centrifugal oil-gas rough separation structure together with the first impact plate 5 and the second impact plate 6 on both sides thereof, and can further improve the oil-gas separation efficiency during the rough separation process, thereby improving the oil-gas separation effect. Figure 3 As shown, the impeller coarse separation component in the embodiment of the utility model includes a rotating impeller 11 and two mounting brackets 12 for mounting the rotating impeller 11. A rotating shaft 13 is fixedly provided at the axis of the rotating impeller 11, and the rotating shaft 13 can be integrally formed with the rotating impeller 11 through a pre-embedded injection molding process to improve the stability of the connection. The length direction of the rotating shaft 13 (and the axial direction of the rotating impeller 11) is consistent with the length direction of the first impact plate 5 and the second impact plate 6, so that the blades of the rotating impeller 11 in the circumferential direction can face the first impact plate 5 and the second impact plate 6 to collide and contact with the flowing oil-gas mixture. The two mounting brackets 12 are relatively arranged at the two ends of the rotating shaft 13, and the two ends of the rotating shaft 13 are rotatably connected to the corresponding mounting brackets 12, so that the rotating impeller 11 can rotate under the flow impact of the oil-gas mixture. Further, as Figure 4 As shown, the lower end of the mounting bracket 12 is fixedly connected to the base plate 2, and an elastic buckle 14 is provided at the upper end of the mounting bracket 12. The rotating shaft 13 can be rotatably inserted into the elastic buckle 14, which is easy to install, has a simple structure, and has a low manufacturing cost.

[0031] A rough separation oil return groove 15 with an oil outlet at the bottom is provided on the bottom plate 2, and the rough separation oil return groove 15 is in fluid communication with the secondary separation chamber 8. When the oil-gas mixture flows from the primary separation chamber 7 into the secondary separation chamber 8, the rotating impeller 11 can rotate under the flow impact of the oil-gas mixture, and the centrifugal force generated by the rotation quickly throws out the oil droplets adsorbed on the rotating impeller 11 by collision, and the thrown oil droplets fall on the first impact plate 5 and the second impact plate 6 on both sides, and flow downward along the first impact plate 5 and the second impact plate 6 under the action of gravity into the rough separation oil return groove 15, and flow back through the oil outlet of the rough separation oil return groove 15. Furthermore, a plurality of longitudinal ribs 16 with a V-shaped cross section can be provided on the side of the first impact plate 5 and the second impact plate 6 facing the rotating impeller 11 to increase the contact area between the first impact plate 5, the second impact plate 6 and the oil-gas mixture.

[0032] A fiber-cotton fine separation component is provided in the three-stage separation chamber 9, which is used to further finely separate the inflowing oil-gas mixture. The gas outlet 4 is provided on the gas outlet side of the fiber-cotton fine separation component, and the oil-gas mixture after fine separation can be discharged from the gas outlet 4. A fine separation return oil tank 17 with an oil outlet at the bottom is also provided on the bottom plate 2. The gas inlet side of the fiber-cotton fine separation component is fluidly connected to the rough separation return oil tank 15, and the gas outlet side of the fiber-cotton fine separation component is fluidly connected to the fine separation return oil tank 17; the oil droplets separated by collision with the gas inlet side of the fiber-cotton fine separation component can flow into the rough separation return oil tank 15 under the action of gravity for reflux, and the oil droplets separated by filtration of the fiber-cotton fine separation component can flow into the fine separation return oil tank 17 under the action of gravity for reflux. Furthermore, the embodiment of the utility model is provided with an oil return umbrella valve 18 at the oil outlet of the fine separation return oil tank 17, which is used to prevent part of the unseparated oil-gas mixture from entering from there.

[0033] The fiber-cotton fine separation component is a conventional technical means in this field. As an optional implementation mode, the fiber-cotton fine separation component in the embodiment of the utility model includes a fine separation partition 20 provided with a fiber-cotton filter structure 19, and the fine separation partition 20 is fixedly arranged between the coarse separation return oil tank 15 and the fine separation return oil tank 17.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil-gas separator with an impeller structure, comprising a housing and a bottom plate fixedly mounted at the bottom of the housing, an oil-gas separation chamber is formed between the housing and the bottom plate, an air inlet connected to the oil-gas separation chamber is provided at one end of the bottom plate, and an air outlet connected to the oil-gas separation chamber is provided at the other end of the housing, characterized in that: A first impact plate and a second impact plate are sequentially arranged in the oil-gas separation chamber along the flow direction of the oil-gas mixture, and the first impact plate and the second impact plate separate the oil-gas separation chamber into a primary separation chamber, a secondary separation chamber and a tertiary separation chamber which are sequentially connected; The first-stage separation chamber is divided by an air intake partition to form a labyrinth-type air intake passage connected to the air intake port; the second-stage separation chamber is provided with an impeller rough separation component, and the impeller rough separation component and the first impact plate and the second impact plate on both sides thereof jointly form a centrifugal oil-gas rough separation structure; the third-stage separation chamber is provided with a fiber-cotton-fine separation component, and the air outlet is provided on the air outlet side of the fiber-cotton-fine separation component; A coarse separation oil return groove and a fine separation oil return groove with an oil outlet at the bottom are arranged on the bottom plate. The coarse separation oil return groove is connected to the secondary separation chamber and the air inlet side fluid of the fiber-cotton fine separation component, and the fine separation return oil groove is connected to the air outlet side fluid of the fiber-cotton fine separation component.

2. The oil-gas separator with an impeller structure according to claim 1, characterized in that: The impeller coarse separation assembly includes a rotating impeller and two mounting brackets for mounting the rotating impeller; a rotating shaft is fixedly arranged at the axis of the rotating impeller, and the length direction of the rotating shaft is consistent with the length direction of the first impact plate and the second impact plate; the two mounting brackets are relatively arranged at both ends of the rotating shaft, and the two ends of the rotating shaft are respectively rotatably connected to the corresponding mounting brackets.

3. The oil-gas separator with an impeller structure according to claim 2, characterized in that: The rotating shaft is integrally formed with the rotating impeller through a pre-embedded injection molding process.

4. The oil-gas separator with an impeller structure according to claim 2, characterized in that: The lower end of the mounting bracket is fixedly connected to the bottom plate, the upper end of the mounting bracket is provided with an elastic buckle, and the rotating shaft is rotatably inserted into the elastic buckle.

5. The oil-gas separator with an impeller structure according to claim 2, characterized in that: A plurality of longitudinal ribs with V-shaped cross sections are arranged on the side of the first impact plate and the second impact plate facing the rotating impeller.

6. The oil-gas separator with an impeller structure according to claim 1, characterized in that: The shell and the bottom plate are fixedly connected by a vibration friction welding process.

7. The oil-gas separator with an impeller structure according to claim 1, characterized in that: The fiber cotton fine separation component comprises a fine separation partition provided with a fiber cotton filtering structure, and the fine separation partition is fixedly arranged between the rough separation oil return tank and the fine separation oil return tank.

8. The oil-gas separator with an impeller structure according to claim 1, characterized in that: An oil return umbrella valve is installed at the oil outlet of the fine separation oil return tank.

9. The oil-gas separator with an impeller structure according to claim 1, characterized in that: The lower end of the first impact plate is fixedly connected to the bottom plate, and a gap is provided between the upper end of the first impact plate and the shell for the oil-gas mixture to flow; the upper end of the second impact plate is fixedly connected to the shell, and a gap is provided between the lower end of the second impact plate and the bottom plate for the oil-gas mixture to flow.

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