Efficient oil-gas separation breathing structure

Abstract

The utility model belongs to the technical field of internal combustion engines, and provides an efficient oil-gas separation breathing structure which is arranged on an engine body of an engine and comprises an installation cavity, a gas inlet, a gas outlet, a gas inlet, a gas outlet and a gas outlet. The separating element is arranged in the mounting cavity, fixedly connected with the machine body and used for separating the mounting cavity into a plurality of cooling cavities which are sequentially communicated, the air inlet main opening is communicated with the first cooling cavity, and the air outlet main opening is communicated with the last cooling cavity; and the valve plate assembly is arranged at the air inlet main opening, and when the pressure intensity in the crankcase exceeds a preset value, the valve plate assembly is opened, so that oil mist in the crankcase can enter the mounting cavity through the air inlet main opening. The efficient oil-gas separation breathing structure is simple in structure, reasonable in design, capable of recycling engine oil in oil mist and high in recycling efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of internal combustion engines, in particular to a high-efficiency oil-gas separation breathing structure. Background Art

[0002] Internal combustion engines include engines that use gas and / or oil as fuel, such as gasoline engines, diesel engines, and mixed-fuel engines (i.e., engines that can use both oil and gas as fuel). During operation, the fuel in the combustion chamber generates a large amount of heat, which drives the piston to move, thereby achieving the purpose of producing work.

[0003] However, the heat generated by fuel combustion diffuses through the engine into the crankcase, raising the oil temperature. The high-speed stirring of the dipstick creates a large amount of oil mist within the crankcase, which lubricates the crankcase and related components within the cylinder head. Directly discharging the oil mist from the cylinder head increases oil consumption. Therefore, efficiently recovering the oil mist has become a pressing issue for internal combustion engines. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a high-efficiency oil and gas separation breathing structure to solve or alleviate the above-mentioned technical problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a high-efficiency oil-gas separation breathing structure, which is arranged on the engine body and includes:

[0006] a mounting cavity, which is provided on a side wall of the engine body and has an air intake port, an air outlet port, and an oil return port, wherein the air intake port is in communication with a crankcase of the engine, the air outlet port is in communication with an air outlet pipe of the engine, and the oil return port is located at the bottom of the mounting cavity and is in communication with an oil pan of the engine;

[0007] a partition element, which is disposed in the installation cavity and fixedly connected to the body, and is used to divide the installation cavity into a plurality of cooling cavities that are sequentially connected, the air inlet is connected to the first cooling cavity, and the air outlet is connected to the last cooling cavity; and

[0008] A valve plate assembly is arranged at the air intake manifold, wherein when the pressure in the crankcase exceeds a preset value, the valve plate assembly opens to allow the oil mist in the crankcase to enter the installation cavity through the air intake manifold.

[0009] Furthermore, the air outlet and the air inlet of the cooling cavity are staggered so that more oil mist flows along the cooling cavity to the top of the cooling cavity.

[0010] Furthermore, the air inlet and the air outlet of any one of the cooling chambers are respectively located on two adjacent sides of the cooling chamber, so that the oil mist continuously changes direction during the flow process, thereby reducing the flow speed of the oil mist.

[0011] Furthermore, the bottom side wall of the installation cavity is arranged at an inclination, and the oil return port is arranged on a lower side of the bottom side wall of the installation cavity.

[0012] Furthermore, the valve plate assembly includes an elastic valve plate, a first end of which is fixedly connected to the side wall of the installation cavity, and a second end of which is used to block the main air inlet.

[0013] Furthermore, the valve plate assembly further includes a limiting plate, a first end of which is fixedly connected to the side wall of the installation cavity, and a second end of which is located above the elastic valve plate to limit the elastic valve plate.

[0014] Furthermore, the first ends of the elastic valve plate and the limiting plate are connected to the side wall of the installation cavity through a first bolt, the first end of the elastic valve plate is provided with a first limiting portion, the side wall of the installation cavity is provided with a limiting protrusion, and the limiting protrusion is provided with a first limiting groove adapted to the first limiting portion.

[0015] Furthermore, two limiting protrusions are provided, and the two limiting protrusions are respectively provided on both sides of the elastic valve plate.

[0016] Furthermore, two sides of the first end of the limiting piece respectively conflict with the two limiting protrusions.

[0017] Furthermore, the outer side wall of the partition element is provided with a second limiting groove, and the inner side wall of the installation cavity is provided with a second limiting portion adapted to the second limiting groove.

[0018] Beneficial effects of the utility model:

[0019] The high-efficiency oil-gas separation breathing structure provided by the utility model has a simple structure and a reasonable design. When the pressure value in the crankcase exceeds a preset value, the high-temperature oil mist in the crankcase enters the breathing structure, thereby cooling the high-temperature oil mist, so that the engine oil in the oil mist is deposited in the installation cavity and flows back to the oil pan through the oil return port, thereby achieving the purpose of improving the engine life and reducing oil consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0021] Figure 1 This is an exploded perspective view of a high-efficiency oil-gas separation breathing structure provided by one embodiment of the utility model;

[0022] Figure 2 for Figure 1 An enlarged view of section A is shown;

[0023] Figure 3 for Figure 2 An enlarged view of portion B is shown;

[0024] Figure 4 for Figure 1 A partial cross-sectional view of a high-efficiency oil-gas separation breathing structure is shown;

[0025] Figure 5 for Figure 1 A perspective view of the partition element of the high-efficiency oil-gas separation breathing structure in a first direction;

[0026] Figure 6 for Figure 1 The perspective view of the partition element of the high-efficiency oil-gas separation breathing structure in the second direction is shown.

[0027] Reference numerals:

[0028] 100. Body; 110. Mounting cavity; 111. Air inlet; 112. Air outlet; 113. Oil return port; 120. Limiting protrusion; 130. First limiting groove; 140. Second limiting portion; 200. Partitioning element; 210. Base plate; 220. First partition; 230. Second partition; 240. Third partition; 201. Second limiting groove; 310. Elastic valve plate; 311. First limiting portion; 320. Limiting plate; 321. Through hole; 400. First bolt; 500. Second bolt; 600. Cover plate. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0033] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] like Figure 1-6 As shown, the utility model provides a high-efficiency oil-gas separation breathing structure, which is arranged on the engine body 100 and includes a mounting cavity 110, a partition element 200 and a valve plate assembly.

[0036] The mounting cavity 110 is provided on the side wall of the engine body 100. The mounting cavity 110 has an air inlet 111, an air outlet 112, and an oil return port 113. The air inlet 111 is connected to the crankcase of the engine so that the oil mist (a mixture of engine oil and air, etc.) in the crankcase can enter the mounting cavity 110. The air outlet 112 is connected to the air outlet pipe so that the gas after the engine oil is recovered can be discharged from the air outlet 112 into the air outlet pipe. The oil return port 113 is located at the bottom of the mounting cavity 110. The oil return port 113 is connected to the oil pan of the engine so that the engine oil can flow back into the oil pan through the oil return port 113. The oil return port can be connected to the oil pan either through the oil return pipe or through the oil channel provided on the side wall of the engine body 100 and the oil pan.

[0037] Specifically, a cover plate 600 is provided at the opening of the installation cavity 110 , and the air outlet 112 is provided on the cover plate 600 .

[0038] Separator element 200 is disposed within mounting cavity 110 and fixedly connected to housing 100. In this embodiment, separator element 200 is fixedly connected to housing 100 via second bolts 500. Separator element 200 is used to divide mounting cavity 110 into a plurality of sequentially connected cooling chambers, with the air inlet 111 connected to the first cooling chamber and the air outlet 112 connected to the last cooling chamber.

[0039] In the working state, the oil mist enters from the air inlet 111 and flows in sequence along the multiple cooling chambers toward the air outlet 112. During this process, the engine oil in the oil mist is cooled and deposited in the cooling chamber, and finally flows into the oil pan from the oil return port 113.

[0040] The valve assembly is disposed at the air intake manifold 111 , wherein when the pressure in the crankcase exceeds a preset value, the valve assembly opens to allow the oil mist in the crankcase to enter the mounting cavity 110 through the air intake manifold 111 .

[0041] Specifically, under working conditions, as the temperature and oil mist in the crankcase increase, the pressure in the crankcase gradually increases. When the pressure in the crankcase exceeds a preset value, the valve assembly opens, allowing the oil mist in the crankcase to enter the installation cavity 110 through the air inlet manifold 111. The oil mist entering the installation cavity 110 flows through each cooling cavity in turn toward the air outlet manifold 112. During this process, the engine oil in the oil mist is cooled and deposited, and finally flows back into the oil pan through the oil return port 113.

[0042] The high-efficiency oil-gas separation breathing structure provided by the utility model has a simple structure and a reasonable design. When the pressure value in the crankcase exceeds a preset value, the high-temperature oil mist in the crankcase enters the breathing structure, thereby cooling the high-temperature oil mist, so that the engine oil in the oil mist is deposited in the mounting cavity 110 and flows back to the oil pan through the oil return port 113, thereby achieving the purpose of improving the engine life and reducing oil consumption.

[0043] like Figure 5 、 6 As shown, the partition element 200 includes a base plate 210 and a first separator 220 and a second separator 230 disposed at the bottom of the base plate 210 .

[0044] Among them, there are multiple second partitions 230, and the multiple second partitions 230 are arranged in sequence along the length direction of the substrate 210, and a first partition 210 is arranged between any two adjacent second partitions 230. The first partition 210 separates the space between the two adjacent second partitions 230, thereby achieving the purpose of forming more cooling cavities and saving space.

[0045] Preferably, a third partition plate 240 is provided on a side of a second partition plate 230 away from the air inlet and facing the air outlet. The third partition plate 240 is used to separate the corresponding space to form more cooling chambers.

[0046] like Figure 5 、 6 As shown, the air outlet and the air inlet of the cooling cavity are staggered so that more oil mist flows along the cooling cavity to the top of the cooling cavity.

[0047] like Figure 5 、 6 As shown in the figure, the direction of the arrow is the movement direction of the oil mist. Under the working state, when the air outlet of the cooling chamber is located above the air inlet, a small part of the high-temperature oil mist entering the cooling chamber will directly enter the next cooling chamber from the air outlet of the cooling chamber, while most of the high-temperature oil mist will continue to flow upward along the cooling chamber under the action of inertia, its own temperature and buoyancy (under the same conditions, the higher the temperature, the smaller the gas density), until it collides with the top side wall of the cooling chamber, and is bounced downward by the top side wall of the cooling chamber, and finally enters the next cooling chamber from the air outlet of the cooling chamber, thereby increasing the movement distance of the oil mist in the cooling chamber and the residence time of the oil mist in the cooling chamber, thereby achieving the purpose of improving the cooling effect.

[0048] When the air outlet of the cooling chamber is located below the air inlet, since the higher the temperature, the smaller the density of the oil mist (i.e., hot air floats), most of the high-temperature oil mist will continue to flow upward along the cooling chamber until it collides with the top side wall of the cooling chamber, and is then bounced downward by the top side wall of the cooling chamber, and finally enters the next cooling chamber from the air outlet of the cooling chamber, thereby increasing the movement distance of the oil mist in the cooling chamber and the residence time of the oil mist in the cooling chamber, thereby achieving the purpose of improving the cooling effect.

[0049] like Figure 5 、 6 As shown, the air inlet and outlet of any cooling cavity are located on adjacent sides of the cavity, allowing the oil mist to continuously change direction during its flow, thereby reducing its velocity and improving the cooling effect. At the same time, more oil mist will move upward and collide with the top sidewalls of the cooling cavity, where it will be bounced downward and eventually enter the next cooling cavity through the air outlet, further improving the cooling effect. Furthermore, this arrangement of air inlets and outlets can separate the cooling cavities into two parallel groups, saving space even with the same number of cooling cavities.

[0050] like Figure 4 As shown, the bottom side wall of the installation cavity 110 is inclined, and the oil return port 113 is provided at the lower side of the bottom side wall of the installation cavity 110 so that the engine oil gathers at the bottom of the installation cavity 110 and eventually flows back into the oil pan from the oil return port 113 .

[0051] like Figure 2 、 3 As shown in Figure 4, the valve plate assembly includes an elastic valve plate 310, a first end of the elastic valve plate 310 is fixedly connected to the side wall of the mounting cavity 110, and a second end is used to block the main air intake port 111. In the working state, when the pressure in the crankcase exceeds a preset value, the oil mist in the crankcase acts on the valve plate and applies a force to the valve plate to push the second end of the valve plate to move, thereby opening the main air intake port 111.

[0052] Preferably, the valve plate assembly also includes a limiting plate 320, the first end of which is fixedly connected to the side wall of the installation cavity 110, and the second end is located above the elastic valve plate 310 to limit the elastic valve plate 310, thereby preventing the valve plate from being damaged due to excessive deformation.

[0053] Preferably, a through hole 321 is provided on the limiting plate 320 to balance the gas pressure on both sides of the elastic valve plate 310, thereby facilitating the elastic valve plate 310 to return to its original position under the action of its own elastic force.

[0054] like Figure 2 、3 As shown in Figures 4 and 5, the first ends of the elastic valve disc 310 and the limiting disc 320 are connected to the side wall of the mounting cavity 110 through the first bolt 400. The first end of the elastic valve disc 310 is provided with a first limiting portion 311, and the side wall of the mounting cavity 110 is provided with a limiting protrusion 120. The limiting protrusion 120 is provided with a first limiting groove 130 adapted to the first limiting portion 311. The first limiting groove 130 cooperates with the first limiting portion 311 to prevent the elastic valve disc 310 from rotating around the first bolt 400, thereby achieving the purpose of limiting the elastic valve disc 310.

[0055] like Figure 2 、 3 As shown, two limiting protrusions 120 are provided, one on each side of the elastic valve disc 310. The two sides of the first end of the limiting disc 320 respectively contact the two limiting protrusions 120. The provision of two limiting protrusions 120 enhances the limiting effect on the elastic valve disc 310. Furthermore, the cooperation between the limiting disc 320 and the two limiting protrusions 120 prevents the limiting disc 320 from rotating about the first bolt 400, thereby limiting the position of the limiting disc 320.

[0056] like Figure 2 As shown, the outer side wall of the partition element 200 is provided with a second limiting groove 201, and the inner side wall of the installation cavity 110 is provided with a second limiting portion 140 adapted to the second limiting groove 201. Through the cooperation between the second limiting groove 201 and the second limiting portion 140, the purpose of limiting the partition element 200 is achieved.

[0057] The high-efficiency oil-gas separation breathing structure provided by the utility model has a simple structure and a reasonable design. It achieves the purpose of recovering the engine oil by introducing the oil mist in the oil pan into the mounting cavity 110, which not only effectively reduces the pressure in the crankcase, but also reduces the consumption of engine oil.

[0058] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A high-efficiency oil-gas separation breathing structure, which is arranged on the engine body (100), characterized in that: include: A mounting cavity (110) is provided on a side wall of the engine body (100), and comprises an air intake port (111), an air outlet port (112), and an oil return port (113), wherein the air intake port (111) is in communication with a crankcase of the engine, the air outlet port (112) is in communication with an air outlet pipe of the engine, and the oil return port (113) is located at the bottom of the mounting cavity (110), and is in communication with an oil pan of the engine; a partition element (200) disposed in the installation cavity (110) and fixedly connected to the machine body (100), and used to partition the installation cavity (110) into a plurality of cooling cavities that are sequentially connected, the air inlet (111) being connected to the first cooling cavity, and the air outlet (112) being connected to the last cooling cavity; and A valve plate assembly is arranged at the air intake manifold (111), wherein when the pressure in the crankcase exceeds a preset value, the valve plate assembly opens to allow the oil mist in the crankcase to enter the installation cavity (110) through the air intake manifold (111).

2. The high-efficiency oil-gas separation breathing structure according to claim 1 is characterized in that: The air outlet and the air inlet of the cooling cavity are staggered so that more oil mist flows along the cooling cavity to the top of the cooling cavity.

3. The high-efficiency oil-gas separation breathing structure according to claim 2 is characterized in that: The air inlet and the air outlet of any one of the cooling chambers are respectively located on two adjacent sides of the cooling chamber, so that the oil mist continuously changes direction during the flow process, thereby reducing the flow speed of the oil mist.

4. The high-efficiency oil-gas separation breathing structure according to any one of claims 1 to 3, characterized in that: The bottom side wall of the installation cavity (110) is arranged at an inclination, and the oil return port (113) is arranged on the lower side of the bottom side wall of the installation cavity (110).

5. The high-efficiency oil-gas separation breathing structure according to claim 4 is characterized in that: The valve plate assembly comprises an elastic valve plate (310), a first end of the elastic valve plate (310) being fixedly connected to the side wall of the installation cavity (110), and a second end being used for blocking the main air inlet (111).

6. The high-efficiency oil-gas separation breathing structure according to claim 5 is characterized in that: The valve plate assembly further comprises a limiting plate (320), wherein a first end of the limiting plate (320) is fixedly connected to a side wall of the installation cavity (110), and a second end is located above the elastic valve plate (310) to limit the elastic valve plate (310).

7. The high-efficiency oil-gas separation breathing structure according to claim 6 is characterized in that: The first ends of the elastic valve plate (310) and the limiting plate (320) are connected to the side wall of the installation cavity (110) through a first bolt (400), the first end of the elastic valve plate (310) is provided with a first limiting portion (311), and the side wall of the installation cavity (110) is provided with a limiting protrusion (120), and the limiting protrusion (120) is provided with a first limiting groove (130) adapted to the first limiting portion (311).

8. The high-efficiency oil-gas separation breathing structure according to claim 7 is characterized in that: Two limiting protrusions (120) are provided, and the two limiting protrusions (120) are respectively provided on both sides of the elastic valve plate (310).

9. The high-efficiency oil-gas separation breathing structure according to claim 8, characterized in that: Both sides of the first end of the limiting piece (320) respectively contact the two limiting protrusions (120).

10. The high-efficiency oil-gas separation breathing structure according to claim 1, 2, 3, 5, 6, 7, 8 or 9, characterized in that: The outer side wall of the partition element (200) is provided with a second limiting groove (201), and the inner side wall of the installation cavity (110) is provided with a second limiting portion (140) adapted to the second limiting groove (201).

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