An engine breathing system

Abstract

The present invention belongs to the field of engines, and discloses an engine breathing system, including a body and a chamber cover, wherein the body is provided with an exhaust gas inlet; the chamber cover is provided with a first cavity, and the chamber cover is provided on the body to close the first cavity; a first partition, a second partition and a third partition are sequentially arranged in the first cavity, and the first partition and the second partition sequentially separate the first cavity into a labyrinth cavity, a swirl channel and an adsorption cavity for oil-gas separation, and the third partition and the side wall of the first cavity are surrounded to form an oil storage cavity; a first opening is provided on the first partition, and the labyrinth cavity is connected with the swirl channel through the first opening; a second opening is provided on the second partition, and the second opening is located below the first opening, and the swirl channel is connected with the adsorption cavity through the second opening; a swirl port is provided on one end of the third partition near the second opening. The present invention can greatly reduce the amount of oil exhaled by performing three-pass oil filtration on the exhaust gas, which not only reduces the energy consumption of the oil, but also reduces the pollution to the environment.

Description

Technical Field

[0001] The invention belongs to the technical field of engines, and in particular relates to an engine breathing system. Background Art

[0002] When the engine is working, part of the exhaust gas produced in the combustion chamber will flow into the crankcase as the piston continues to reciprocate. If the exhaust gas flowing into the crankcase cannot be discharged in time, the pressure in the crankcase will continue to rise and form high pressure, which will cause a large amount of oil in the crankcase to leak from the sealing surface and the oil pipe, affecting the normal operation of the engine. Therefore, a breathing system needs to be set up to control the pressure in the crankcase to prevent the pressure in the crankcase from being too high.

[0003] When the breathing system discharges gas, it also needs to separate the gas from oil. However, the current breathing system is generally a single maze structure, which makes it impossible to effectively separate the gas from oil, and it is easy to cause the problem of breathing oil, which not only increases the energy consumption of the oil, but also pollutes the environment. Summary of the invention

[0004] The purpose of the present invention is to provide an engine breathing system to solve the problem of engine oil breathing, so as to reduce oil energy consumption and environmental pollution.

[0005] The technical solution provided by the present invention is as follows:

[0006] In one aspect, an engine breathing system is provided, comprising:

[0007] A machine body, wherein the machine body is provided with an exhaust gas inlet;

[0008] A chamber cover, wherein a first cavity is provided on the chamber cover, and the chamber cover is arranged on the machine body to close the first cavity;

[0009] A first baffle, a second baffle and a third baffle are sequentially arranged in the first cavity, the first baffle and the second baffle sequentially divide the first cavity into a labyrinth cavity, a cyclone channel and an adsorption cavity for oil-gas separation, and the third baffle and the side wall of the first cavity are enclosed to form an oil storage cavity;

[0010] The first partition plate is provided with a first opening, and the labyrinth cavity is connected with the swirl channel through the first opening;

[0011] The second partition plate is provided with a second opening, the second opening is located below the first opening, and the cyclone channel is connected with the adsorption chamber through the second opening;

[0012] A swirl port is provided on one end of the third partition plate close to the second opening;

[0013] The labyrinth chamber is connected to the air inlet, the adsorption chamber is provided with an exhaust port, and the side wall of the oil storage chamber is provided with an oil return port.

[0014] Further preferably, the first cavity comprises a first side wall and a second side wall which are arranged opposite to each other;

[0015] One end of the first partition is disposed on the second side wall, and the other end of the first partition is spaced apart from the first side wall to form the first opening;

[0016] One end of the second partition is disposed on the first side wall, and the other end of the second partition is spaced apart from the second side wall to form the second opening.

[0017] Further preferably, the area of ​​the first opening is larger than the area of ​​the second opening.

[0018] Further preferably, the first partition is arc-shaped;

[0019] The concave portion of the arc-shaped first partition plate is arranged toward the swirl channel.

[0020] Further preferably, it further comprises a support member for supporting the first partition;

[0021] One end of the support member is disposed on the second side wall, and the other end of the support member is disposed on an end of the first partition away from the second side wall.

[0022] Further preferably, the second partition includes a vertical portion, a connecting portion and an inclined portion;

[0023] One end of the vertical portion is disposed on the first side wall, and the other end of the vertical portion is connected to the inclined portion through the connecting portion;

[0024] A distance from one end of the inclined portion connected to the connecting portion to the first side wall is smaller than a distance from the other end of the inclined portion to the first side wall.

[0025] Further preferably, the third partition is located below the adsorption chamber;

[0026] The third partition plate is arc-shaped, and a convex portion of the arc-shaped third partition plate is arranged toward the oil storage chamber.

[0027] Further preferably, it also includes a fourth partition:

[0028] The fourth partition is arranged in the labyrinth cavity;

[0029] The fourth partition divides the labyrinth cavity into a plurality of labyrinth channels.

[0030] Further preferably, it also includes a respirator;

[0031] The respirator is arranged in the adsorption chamber, and an exhaust pipe is arranged on the respirator. The exhaust pipe extends out of the chamber cover through the exhaust port to discharge the waste gas.

[0032] Further preferably, the chamber cover, the first cavity, the first partition, the second partition and the third partition are integrally formed; and / or,

[0033] The opening of the swirl port is arranged along a tangent line of the exhaust gas flow direction.

[0034] Compared with the prior art, the engine breathing system provided by the present invention has the following beneficial effects:

[0035] 1) The engine breathing system of the present invention is provided with a labyrinth chamber, a swirl channel and an adsorption chamber. After the exhaust gas enters the breathing system, the exhaust gas is subjected to the first oil filtration through the labyrinth chamber, and then the exhaust gas is subjected to the second oil filtration through the swirl channel. Finally, the exhaust gas is subjected to the third oil filtration through the channel adsorption chamber. By subjecting the exhaust gas to three-pass oil filtration, the amount of oil exhaled can be greatly reduced, which not only reduces the oil energy consumption, but also reduces the pollution to the environment.

[0036] 2) The present invention utilizes the combination of the body and the chamber cover space to bring the respirator closest to the adsorption cavity area with less oil mist, thereby greatly reducing the amount of oil exhaled.

[0037] 3) Under the premise of limited space, the present invention designs the maze, vortex and adsorption chamber structures in an integrated compact structure. The entire breathing system assembly has only one external respirator structure, which greatly reduces the structure of the assembly, reduces costs and increases efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of an engine breathing system.

[0039] Figure 1 is a cross-sectional view of a chamber cover of an embodiment of an engine breathing system of the present invention;

[0040] Figure 2 It is a structural schematic diagram of a body of an engine breathing system of the present invention;

[0041] Figure 3 It is a cross-sectional view of a chamber cover of another embodiment of an engine breathing system of the present invention.

[0042] Description of Figure Numbers

[0043] 1. Machine body; 11. Air inlet; 2. Chamber cover; 3. First cavity; 31. Labyrinth cavity; 32. Swirl channel; 33. Adsorption cavity; 34. Oil storage cavity; 341. Oil return port; 35. First side wall; 36. Second side wall; 4. First partition; 41. First opening; 5. Second partition; 51. Second opening; 52. Vertical portion; 53. Connecting portion; 54. Inclined portion; 6. Third partition; 61. Swirl port; 7. Support member; 8. Fourth partition; 9. Respirator; 91. First inner cavity; 92. Second inner cavity. DETAILED DESCRIPTION

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0045] It should be understood that when used in this specification, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections.

[0046] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0047] The embodiment of the present invention provides an engine breathing system, please refer to Figure 1 and Figure 2 , including a body 1 and a chamber cover 2; the body 1 is provided with an exhaust gas inlet 11; the chamber cover 2 is provided with a first cavity 3, the chamber cover 2 is arranged on the body 1 to close the first cavity 3, and when the chamber cover 2 is assembled with the body 1, a gasket can be arranged at a position on the body 1 opposite to the first cavity 3, and the first cavity 3 is closed by the gasket.

[0048] The first cavity 3 is provided with a first partition plate 4, a second partition plate 5 and a third partition plate 6 in sequence. The first partition plate 4 and the second partition plate 5 divide the first cavity 3 into a labyrinth cavity 31, a cyclone channel 32 and an adsorption cavity 33 for oil-gas separation of the exhaust gas in sequence. The third partition plate 6 and the side wall of the first cavity 3 are surrounded to form an oil storage cavity 34.

[0049] The first partition plate 4 is provided with a first opening 41, and the labyrinth chamber 31 is connected with the swirl channel 32 through the first opening 41; the second partition plate 5 is provided with a second opening 51, and the second opening 51 is located below the first opening 41, and the swirl channel 32 is connected with the adsorption chamber 33 through the second opening 51. The first opening 41 is the entrance of the swirl channel 32, and the second opening 51 is the outlet of the swirl channel 32, and the second opening 51 is located below the first opening 41, so that the exhaust gas can separate the oil and gas in the exhaust gas in the swirl channel 32 through the centrifugal force and gravity.

[0050] A swirl port 61 is provided at one end of the third partition plate 6 near the second opening 51, and the oil separated from the exhaust gas can enter the oil storage chamber 34 through the swirl port 61. The labyrinth chamber 31 is connected to the air inlet 11, the adsorption chamber 33 is provided with an exhaust port, and the side wall of the oil storage chamber 34 is provided with an oil return port 341. When the piston moves upward, the residual oil in the oil storage chamber 34 can flow back to the inner cavity of the body through the oil return port 341, and the inner cavity of the body is a cavity for storing lubricating oil in the body 1. More preferably, the opening of the swirl port 61 is arranged along the tangent of the exhaust gas flow direction.

[0051] In the present embodiment, the exhaust gas enters the labyrinth chamber 31 from the air inlet 11 on the body 1, and the oil vapor in the exhaust gas in the labyrinth chamber 31 is adsorbed on the cavity wall of the labyrinth chamber 31 due to condensation during the flow process, thereby realizing the first oil filtration of the exhaust gas; the labyrinth chamber 31 is connected with the swirl channel 32, and the exhaust gas enters the swirl channel 32 after passing through the labyrinth chamber 31, and the oil particles in the exhaust gas are swirl filtered by centrifugal force and gravity in the swirl channel 32, and are thrown into the oil storage chamber 34 along the tangential direction of the flow direction through the swirl port 61, thereby forming the second oil filtration of the exhaust gas, and the oil-gas separation efficiency is further improved through the compact structural arrangement in a limited space; the outlet of the swirl channel 32 is connected with the adsorption chamber 33, and after the exhaust gas after passing through the swirl channel 32 enters the adsorption chamber 33, the adsorption chamber 33 adsorbs and filters the last small amount of oil particles remaining again, thereby forming the third oil filtration.

[0052] The present invention can greatly reduce the amount of oil exhaled by performing three-pass oil filtering on the exhaust gas, which not only reduces the energy consumption of the oil but also reduces the pollution to the environment.

[0053] In one embodiment, please refer to Figure 1The first cavity 3 includes a first side wall 35 and a second side wall 36 that are arranged opposite to each other; one end of the first partition plate 4 is arranged on the second side wall 36, and the other end of the first partition plate 4 is spaced apart from the first side wall 35 to form the above-mentioned first opening 41, so that the labyrinth cavity 31 is connected with the swirl channel 32 through the first opening 41; one end of the second partition plate 5 is arranged on the first side wall 35, and the other end of the second partition plate 5 is spaced apart from the second side wall 36 to form the above-mentioned second opening 51, so that the swirl channel 32 is connected with the adsorption cavity 33 through the second opening 51.

[0054] In this embodiment, the first partition plate 4 and the second partition plate 5 respectively form openings for communication through the channels in a manner that the other ends are not connected to the inner wall of the first cavity 3 , which can simplify the manufacturing process.

[0055] Preferably, the area of ​​the first opening 41 is larger than that of the second opening 51 ; exhaust gas enters the swirl channel 32 from the first opening 41 with a larger area and flows out through the second opening 51 with a smaller area, which can improve the oil filtering effect of the swirl channel 32 .

[0056] The first partition plate 4 is arc-shaped, and the concave portion of the arc-shaped first partition plate 4 is arranged toward the swirl channel 32. The first partition plate 4 is arc-shaped, which can increase the centrifugal force of the swirl channel 32, thereby improving the oil filtering effect of the swirl channel 32.

[0057] A support member 7 is also provided in the first cavity 3, one end of the support member 7 is provided on the second side wall 36, and the other end of the support member 7 is provided at an end of the first partition plate 4 away from the second side wall 36. The first partition plate 4 is arc-shaped, and by providing the support member 7 below the first partition plate 4, the first partition plate 4 can be supported to prevent the first partition plate 4 from being deformed when the exhaust gas pressure is relatively high.

[0058] The second partition plate 5 includes a vertical portion 52, a connecting portion 53 and an inclined portion 54; one end of the vertical portion 52 is disposed on the first side wall 35, and the other end of the vertical portion 52 is connected to the inclined portion 54 through the connecting portion 53; the distance between the end of the inclined portion 54 connected to the connecting portion 53 and the first side wall 35 is smaller than the distance between the other end of the inclined portion 54 and the first side wall 35. The inclined portion 54 is inclined downward, and the inclined portion 54 and the arc-shaped first partition plate 4 form a swirl channel 32 with a certain arc, which can further increase the centrifugal force of the swirl channel 32, thereby improving the oil filtering effect of the swirl channel 32.

[0059] The third partition plate 6 is located below the adsorption chamber 33; the third partition plate 6 is arc-shaped, and the convex part of the arc-shaped third partition plate 6 is arranged toward the oil storage chamber 34. The arc-shaped third partition plate 6 can buffer the transition of the exhaust gas from the swirl channel 32 to the adsorption chamber 33, and the arc-shaped third partition plate 6 can increase the length of the swirl channel 32, so that the oil particles in the exhaust gas can be filtered through the swirl port 61 to the oil storage chamber 34, thereby improving the oil filtering effect.

[0060] In one embodiment, see Figure 3 At least one fourth partition plate 8 is provided in the labyrinth chamber 31, and the fourth partition plate 8 divides the labyrinth chamber 31 into a plurality of labyrinth channels. By providing the fourth partition plate 8 in the labyrinth chamber 31, the oil particles in the exhaust gas can be adsorbed not only on the inner wall of the labyrinth chamber 31, but also on the inner wall of the labyrinth chamber 31.

[0061] The fourth partition plate 8 further improves the oil filtering effect of the labyrinth chamber 31.

[0062] In one embodiment, see Figure 1 and Figure 3 A respirator 9 is also provided in the adsorption chamber 33. An exhaust pipe is provided on the respirator 9. The exhaust pipe extends out of the chamber cover 2 through the exhaust port to discharge the exhaust gas. After the exhaust gas enters the adsorption chamber 33, a small amount of oil particles remaining in the exhaust gas are adsorbed, and then the exhaust gas enters the respirator 9, and the exhaust gas after oil filtration is discharged from the exhaust pipe on the respirator 9 through the respirator 9.

[0063] The respirator 9 includes a valve body, the inner cavity of the valve body includes a first inner cavity 91 and a second inner cavity 92, the first inner cavity 91 is provided with an air inlet end, the second inner cavity 92 is provided with an exhaust pipe, and the volume of the second inner cavity 92 is greater than the volume of the first inner cavity 91. The volume of the second inner cavity 92 is greater than the volume of the first inner cavity 91, and the exhaust gas flowing into the respirator 9 at a high speed can be expanded and decelerated, which is conducive to the precipitation of oil droplets in the remaining exhaust gas, so that the oil in the exhaust gas is fully separated and the amount of oil exhaled is reduced.

[0064] In one embodiment, the chamber cover 2, the first cavity 3, the first baffle 4, the second baffle 5 and the third baffle 6 are integrally formed. Preferably, the chamber cover 2, the first cavity 3, the first baffle 4, the second baffle 5, the third baffle 6 and the fourth baffle 8 are integrally formed, that is, when the chamber cover 2 is formed, the engine breathing system is formed together with the chamber cover 2, so that the entire breathing system only needs to be connected to an external respirator 9, which can greatly reduce the number of parts and reduce procurement costs.

[0065] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An engine breathing system, characterized in that: include: A machine body, wherein the machine body is provided with an exhaust gas inlet; A chamber cover, wherein a first cavity is provided on the chamber cover, and the chamber cover is arranged on the machine body to close the first cavity; A first baffle, a second baffle and a third baffle are sequentially arranged in the first cavity, the first baffle and the second baffle sequentially divide the first cavity into a labyrinth cavity, a cyclone channel and an adsorption cavity for oil-gas separation, and the third baffle and the side wall of the first cavity are enclosed to form an oil storage cavity; The first partition plate is provided with a first opening, and the labyrinth cavity is connected with the swirl channel through the first opening; The second partition plate is provided with a second opening, the second opening is located below the first opening, and the cyclone channel is connected with the adsorption chamber through the second opening; A swirl port is provided on one end of the third partition plate close to the second opening; The labyrinth chamber is connected to the air inlet, the adsorption chamber is provided with an exhaust port, and the side wall of the oil storage chamber is provided with an oil return port; The first cavity includes a first side wall and a second side wall that are oppositely disposed; One end of the first partition is disposed on the second side wall, and the other end of the first partition is spaced apart from the first side wall to form the first opening; One end of the second partition is disposed on the first side wall, and the other end of the second partition is spaced apart from the second side wall to form the second opening.

2. An engine breathing system according to claim 1, characterized in that: An area of ​​the first opening is greater than an area of ​​the second opening.

3. An engine breathing system according to claim 1, characterized in that: The first partition is arc-shaped; The concave portion of the arc-shaped first partition plate is arranged toward the swirl channel.

4. An engine breathing system according to claim 3, characterized in that: Also included is a support member for supporting the first partition; One end of the support member is disposed on the second side wall, and the other end of the support member is disposed on an end of the first partition away from the second side wall.

5. The engine breathing system according to claim 1, characterized in that: The second partition includes a vertical portion, a connecting portion and an inclined portion; One end of the vertical portion is disposed on the first side wall, and the other end of the vertical portion is connected to the inclined portion through the connecting portion; A distance from one end of the inclined portion connected to the connecting portion to the first side wall is smaller than a distance from the other end of the inclined portion to the first side wall.

6. An engine breathing system according to claim 1, characterized in that: The third partition is located below the adsorption chamber; The third partition plate is arc-shaped, and a convex portion of the arc-shaped third partition plate is arranged toward the oil storage chamber.

7. An engine breathing system according to claim 1, characterized in that: Also includes a fourth bulkhead: The fourth partition is arranged in the labyrinth cavity; The fourth partition divides the labyrinth cavity into a plurality of labyrinth channels.

8. An engine breathing system according to claim 1, characterized in that: It also includes respirators; The respirator is arranged in the adsorption chamber, and an exhaust pipe is arranged on the respirator. The exhaust pipe extends out of the chamber cover through the exhaust port to discharge the waste gas.

9. An engine breathing system according to claim 1, characterized in that: The chamber cover, the first cavity, the first partition, the second partition and the third partition are integrally formed; and / or, The opening of the swirl port is arranged along a tangent line of the exhaust gas flow direction.

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