Efficient oil-gas separation breathing structure

Abstract

The invention 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 a mounting cavity, a gas inlet, a gas outlet, a gas inlet, a gas outlet and an oil return port, and the mounting cavity is arranged on the side wall of the engine body and provided with a gas inlet main port, a gas outlet main port and a gas return port; 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 and reasonable in design, engine oil in oil mist can be recycled, and the recycling efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of internal combustion engines, and 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). When working, the fuel generates a large amount of heat in the combustion chamber to push the piston to move, thereby achieving the purpose of doing work.

[0003] However, the heat generated by fuel combustion will diffuse into the crankcase along with the engine body, causing the oil temperature to rise. Under the high-speed stirring of the oil dipstick, a large amount of oil mist will be formed in the crankcase, which lubricates the case and related parts in the cylinder head. If the oil mist is discharged directly from the cylinder head side, the oil consumption will increase. Therefore, how to efficiently recover the oil mist has become an urgent problem to be solved in internal combustion engines. Summary of the invention

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

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

[0006] An installation cavity, which is arranged on the side wall of the engine body, and has an air inlet, an air outlet and an oil return port, wherein the air inlet is communicated with the crankcase of the engine, the air outlet is communicated with the air outlet pipe of the engine, and the oil return port is located at the bottom of the installation cavity, and the oil return port is communicated with the 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, thereby reducing the flow speed of the oil mist.

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

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

[0013] Furthermore, the valve plate assembly also includes a limiting plate, a first end of which is fixedly connected to a side wall of the mounting cavity, and a second end of which is located above the elastic valve plate, so as 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 mounting 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 mounting 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 sheet.

[0016] Furthermore, two sides of the first end of the limiting piece are respectively in 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 matched with the second limiting groove.

[0018] Beneficial effects of the present invention:

[0019] The high-efficiency oil-gas separation breathing structure provided by the present invention 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 increasing the engine life and reducing oil consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 An exploded three-dimensional view of a high-efficiency oil-gas separation breathing structure provided by an embodiment of the present invention;

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

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

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

[0025] Figure 5 for Figure 1 A three-dimensional 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 illustrated is a perspective view of the partition element of the high-efficiency oil-gas separation breathing structure in the second direction.

[0027] Reference numerals:

[0028] 100, machine body; 110, installation cavity; 111, main air inlet; 112, main air outlet; 113, oil return port; 120, limiting protrusion; 130, first limiting groove; 140, second limiting portion; 200, partition element; 210, substrate; 220, first partition plate; 230, second partition plate; 240, third partition plate; 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 in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope 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 the present invention belongs.

[0031] In the description of the present 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting 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 technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature 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. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] like Figure 1-6 As shown, the present invention 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 installation cavity 110 is provided on the side wall of the engine body 100, and the installation cavity 110 has an air inlet 111, an air outlet 112 and an oil return port 113, wherein 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 installation 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 into the air outlet pipe from the air outlet 112. The oil return port 113 is located at the bottom of the installation cavity 110, and 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 through the oil return pipe, or can be connected to the oil pan through the oil passage provided on the side wall of the engine body 100 and the oil pan.

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

[0038] The partition element 200 is disposed in the installation cavity 110 and fixedly connected to the body 100. In the embodiment, the partition element 200 is fixedly connected to the body 100 by a second bolt 500. The partition element 200 is used to divide the installation cavity 110 into a plurality of cooling cavities that are sequentially connected, the air inlet 111 is connected to the first cooling cavity, and the air outlet 112 is connected to the last cooling cavity.

[0039] In the working state, the oil mist enters from the air inlet 111 and flows along the multiple cooling chambers in sequence 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 plate assembly is disposed 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 .

[0041] Specifically, under the working state, 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 intake manifold 111. The oil mist entering the installation cavity 110 passes through each cooling cavity in turn and flows 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 present invention 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 increasing 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 partition plate 220 and a second partition plate 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 divides the space between 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, and 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, increasing the residence time of the oil mist in the cooling chamber, and then 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, thereby being bounced downward by the top side wall of the cooling chamber and finally entering 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 air outlet of any cooling cavity are respectively located on the adjacent two sides of the cooling cavity, so that the oil mist continuously changes direction during the flow, thereby reducing the flow speed of the oil mist, and further achieving the purpose of improving the cooling effect. At the same time, more oil mist will move upward and collide with the top side wall of the cooling cavity, so that it will be rebounded downward by the top side wall of the cooling cavity, and finally enter the next cooling cavity from the air outlet of the cooling cavity, so as to further improve the cooling effect. In addition, such an arrangement of the air inlet and the air outlet can separate the cooling cavity into two parallel groups, which saves more space in the case of the same number of cooling cavities.

[0050] like Figure 4 As shown, the bottom side wall of the mounting cavity 110 is inclined, and the oil return port 113 is arranged at the lower side of the bottom side wall of the mounting cavity 110, so that the engine oil gathers at the bottom of the mounting 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 exerts a force on 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 mounting 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, the limiting plate 320 is provided with a through hole 321 to balance the gas pressure on both sides of the elastic valve plate 310, so as to facilitate 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 plate 310 and the limiting plate 320 are connected to the side wall of the mounting cavity 110 through the 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 mounting 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. The first limiting groove 130 cooperates with the first limiting portion 311 to prevent the elastic valve plate 310 from rotating around the first bolt 400, thereby achieving the purpose of limiting the elastic valve plate 310.

[0055] like Figure 2 , 3 As shown, two limiting protrusions 120 are provided, and the two limiting protrusions 120 are respectively provided on both sides of the elastic valve plate 310, and the two sides of the first end of the limiting plate 320 are respectively in conflict with the two limiting protrusions 120. By providing two limiting protrusions 120, the purpose of improving the limiting effect on the elastic valve plate 310 is achieved. At the same time, through the cooperation between the limiting plate 320 and the two limiting protrusions 120, the limiting plate 320 is prevented from rotating around the first bolt 400, thereby achieving the purpose of limiting the limiting plate 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. The purpose of limiting the partition element 200 is achieved through the cooperation between the second limiting groove 201 and the second limiting portion 140.

[0057] The high-efficiency oil-gas separation breathing structure provided by the present invention 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 description of the present invention, a large number of specific details are described. However, it is understood that 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 description.

[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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. 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, and they should all be included in the scope of the claims and specification 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: An installation cavity (110) is arranged 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 installation cavity (110), and the oil return port (113) 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 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, 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 at a 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 a side wall of the installation cavity (110), and a second end of the elastic valve plate (310) being used to block 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 also includes a limiting plate (320), a first end of which is fixedly connected to the side wall of the installation cavity (110), and a second end of which 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) via a first bolt (400); the first end of the elastic valve plate (310) is provided with a first limiting portion (311); 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 two sides of the elastic valve plate (310).

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

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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