Built-in oil-gas separator

Abstract

The utility model relates to the technical field of oil-gas separation, and discloses a built-in oil-gas separator which comprises a sealing surface assembled with a valve chamber cover, a closed oil-gas separation channel is formed after the sealing surface and the valve chamber cover are assembled, a gas inlet is formed in the sealing surface, and a gas outlet is formed in the gas inlet. An impact separation structure and a felt adsorption structure are installed on the side, located in the valve chamber cover, of the sealing face, and a first oil return opening and a second oil return opening are formed in the sealing face. The efficient impact separation structure and the felt adsorption structure are combined, the oil-gas separation process is optimized, the oil-gas separation efficiency is improved, and the oil-gas separation effect is improved. The engine oil consumption is reduced, and meanwhile, the structural stability and durability of the oil-gas separator are enhanced. The oil return design, the sealing performance optimization and the high-temperature and high-pressure resistance of the engine oil return valve ensure the reliability and the environmental protection property in long-term use, can effectively prolong the service life of an engine, improves the performance of the engine, and meets the requirements of modern environment-friendly and high-efficiency engines.

Description

Technical Field

[0001] This utility model relates to the field of oil-gas separation technology, and in particular to a built-in oil-gas separator. Background Technology

[0002] During operation, the air-fuel mixture in a non-road diesel engine can enter the crankcase through the gap between the piston rings and cylinder liners—a process known as blow-by. Blow-by contains fuel, engine oil, moisture, and impurities. If these gases are directly released to the outside, it not only increases engine oil consumption but also pollutes the environment, violating environmental regulations. Therefore, it is essential to effectively separate the engine oil from the blow-by to ensure the gases are smoothly discharged from the crankcase without affecting engine performance and emission standards.

[0003] Currently, existing oil-gas separation technologies for non-road diesel engines are relatively simple, generally employing a metal plate impact separation structure. However, this approach has low oil-gas separation efficiency, leading to significant oil consumption and unsatisfactory oil return, ultimately affecting engine performance and environmental performance. Therefore, there is an urgent need for an improved oil-gas separation structure that can increase separation efficiency, reduce oil consumption, and ensure both high efficiency and reliability in the separation process. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a built-in oil-gas separator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An internal oil-gas separator includes a sealing surface that is assembled and installed with a valve cover. After assembly, the sealing surface forms a sealed oil-gas separation channel with the valve cover. An air inlet is provided on the sealing surface. An impact separation structure and a felt adsorption structure are installed on the side of the sealing surface inside the valve cover. An oil return port one and an oil return port two are provided on the sealing surface. The impact separation structure is located between the felt adsorption structure and the air inlet. The oil return port two is located on the side of the impact separation structure away from the air inlet. The oil return port one is located on the side of the felt adsorption structure away from the impact separation structure.

[0007] As a further embodiment of this utility model: the impact separation structure includes a plurality of separation plates spaced apart on the sealing surface, and the two sides of the separation plates are respectively provided with staggered side wings.

[0008] As a further embodiment of this utility model: the felt adsorption structure includes a mounting base disposed on the sealing surface, a perforated plate disposed on the top of the mounting base, a plurality of openings disposed on the perforated plate, an n-shaped adsorption shell disposed on the side of the perforated plate away from the impact separation structure, and a cover plate snapped onto the end of the adsorption shell away from the perforated plate; the opening position of the openings corresponds to the internal position of the adsorption shell.

[0009] As a further embodiment of this utility model: the side of the perforated plate is provided with a number of spaced-apart placement seats, the placement seats are L-shaped structures, and a felt component is placed on the placement seat. Both the placement seat and the felt component are located inside the adsorption shell.

[0010] As a further improvement of this utility model, a gap is left between the side of the felt component and the opening of the hole.

[0011] As a further improvement of this utility model: a connecting buckle is provided on the side of the cover plate near the perforated plate, and the side of the connecting buckle is engaged with the adsorption shell.

[0012] As a further improvement of this utility model: the bottom of the cover plate is provided with a limiting hole, and the side of the perforated plate is provided with a limiting rod, the end of the limiting rod away from the perforated plate being positioned corresponding to the opening position of the limiting hole.

[0013] As a further improvement of this utility model, a sealing gasket is provided on the side of the orifice plate to seal the gap between the side of the orifice plate and the inner wall of the valve chamber cover.

[0014] As a further improvement of this utility model, a reinforcing rib is provided on the side of the sealing surface away from the impact separation structure.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Highly efficient oil-gas separation performance: This invention achieves both coarse and fine separation through a combination of an impact separation structure and a felt adsorption structure. The impact separation structure, with its labyrinth design, effectively separates oil particles larger than 3μm from the gas, while the felt adsorption structure further adsorbs even smaller oil-gas particles. This significantly improves oil-gas separation efficiency, enabling more thorough removal of oil from blow-by gases and reducing oil consumption.

[0017] 2. Optimized oil return design: This utility model features two oil return ports, allowing the separated engine oil to flow smoothly back to the crankcase, avoiding oil waste. Especially with the combination of the impact separation structure and the felt adsorption structure, the oil recovery process is highly efficient and less prone to backflow blockage, ensuring effective oil return and recycling.

[0018] 3. Compact and Stable Structure: The design employs reinforcing ribs and a limiting structure, enhancing the overall strength and stability of the oil-gas separator. The reinforcing ribs, placed on the side of the sealing surface away from the impact separation structure, effectively improve the mechanical strength of the sealing surface, preventing deformation caused by external stress and maintaining its stability during long-term use. The cooperation of the limiting rod and limiting hole ensures precise installation of the cover plate and orifice plate, preventing component misalignment or loosening, and guaranteeing the sealing performance and reliability of the entire oil-gas separator.

[0019] 4. High Temperature and High Pressure Resistance, Extending Service Life: Due to the high temperature and high pressure environment of non-road diesel engines, the oil-gas separator must possess excellent temperature and pressure resistance. The structural design of this invention, through a reasonable layout of reinforcing ribs and effective material selection, enhances the stability and durability of the oil-gas separator under high temperature and high pressure environments. The design of the sealing surface and oil return structure effectively avoids thermal expansion deformation caused by temperature changes, ensuring long-term stable operation of the oil-gas separator under complex working conditions.

[0020] 5. Enhanced Environmental Friendliness: This invention effectively reduces oil consumption and emissions, avoiding the oil loss problem common in traditional oil-gas separators, thus meeting current environmental protection requirements. Through precise separation and oil return design, it ensures that the engine operates efficiently without causing excessive pollution to the environment, thereby improving environmental friendliness.

[0021] 6. Improved Engine Performance: More efficient oil-gas separation reduces oil consumption and carbon buildup, thereby improving long-term engine performance and fuel efficiency. Simultaneously, the refined oil-gas separation structure reduces impurities in the gas from entering the crankcase, helping to slow engine wear and extend engine life.

[0022] This utility model provides a built-in oil-gas separator that optimizes the oil-gas separation process by combining a high-efficiency impact separation structure with a felt adsorption structure. This improves oil-gas separation efficiency, reduces oil consumption, and enhances the structural stability and durability of the oil-gas separator. Its oil return design, optimized sealing, and high-temperature and high-pressure resistance ensure reliability and environmental friendliness during long-term use, effectively extending engine life and improving engine performance, meeting the requirements of modern environmentally friendly and high-efficiency engines. Located inside the cylinder head cover, it achieves low product cost, minimal engine space occupation, and high oil-gas separation efficiency. Attached Figure Description

[0023] Figure 1 This is a first-view structural diagram of the built-in oil-gas separator proposed in this utility model;

[0024] Figure 2This is a second-view structural diagram of the built-in oil-gas separator proposed in this utility model;

[0025] Figure 3 This is a top view of the structure of a built-in oil-gas separator proposed in this utility model;

[0026] Figure 4 This is a schematic diagram of the felt adsorption structure in a built-in oil-gas separator proposed in this utility model;

[0027] Figure 5 This is a cross-sectional view of the felt adsorption structure in a built-in oil-gas separator proposed in this utility model.

[0028] In the diagram: 1-Sealing surface, 2-Impact separation structure, 21-Side wing, 22-Separation plate, 3-Felt adsorption structure, 31-Orifice plate, 32-Sealing gasket, 33-Cover plate, 34-Adsorption shell, 35-Placement seat, 36-Felt component, 37-Mounting seat, 38-Connecting buckle, 39-Limiting rod, 310-Opening, 4-Oil return port one, 5-Oil return port two, 6-Air inlet, 7-Reinforcing rib. Detailed Implementation

[0029] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0030] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0031] Reference Figure 1-3 An internal oil-gas separator includes a sealing surface 1 that is assembled and installed with a valve cover. After assembly, the sealing surface 1 forms a sealed oil-gas separation channel with the valve cover. An air inlet 6 is provided on the sealing surface 1. An impact separation structure 2 and a felt adsorption structure 3 are installed on the side of the sealing surface 1 inside the valve cover. An oil return port 1 4 and an oil return port 2 5 are provided on the sealing surface 1. The impact separation structure 2 is located between the felt adsorption structure 3 and the air inlet 6. The oil return port 2 5 is located on the side of the impact separation structure 2 away from the air inlet 6. The oil return port 4 is located on the side of the felt adsorption structure 3 away from the impact separation structure 2.

[0032] The gas entering the oil-gas separation channel first passes through the impact separation structure 2. The impact separation structure 2 separates larger oil particles from the airflow through mechanical impact. These larger oil particles collect in the return port 5 and fall back into the crankcase. The impact separation structure 2 performs preliminary coarse separation, reducing the burden on the subsequent fine separation structure. After coarse separation by the impact separation structure 2, the gas enters the felt adsorption structure 3. The felt adsorption structure 3 further captures tiny oil particles in the airflow through the physical adsorption of felt fibers, achieving fine oil-gas separation. The finely separated oil particles are adsorbed by the felt and collect in the return port 4. At this point, the gas after felt adsorption has essentially completed oil separation. The oil separated in the return ports 4 and 5 flows back into the crankcase by gravity, ensuring effective oil recovery and reducing oil consumption. Through this coarse and fine separation, the oil-gas separation efficiency is maximized, while avoiding oil waste during the oil-gas separation process. The rational configuration of the impact separation structure 2 and the felt adsorption structure 3 makes the oil-gas separation effect more stable and durable, which meets the requirements of the engine under high-efficiency and low-emission operation.

[0033] As a preferred embodiment of this utility model, the impact separation structure 2 includes a plurality of separation plates 22 spaced apart on the sealing surface 1. The two sides of the separation plates 22 are respectively provided with staggered side wings 21. The spaced separation plates 22 and side wings 21 form a complex labyrinth plate structure. When the gas enters the oil-gas separation channel through the air inlet 6, it will continuously change its flow direction along the path of the labyrinth plate. This flow path design causes the oil and gas particles in the airflow to repeatedly impact and rotate during the contact process with the separation plates 22 and side wings 21.

[0034] Each separator plate 22 serves as a physical barrier and impactor. When gas flows through these separator plates 22, larger oil particles are captured due to inertia and impact. The separator plates 22 not only physically intercept the gas but also increase the contact frequency between the oil particles and the structure by changing the direction of the airflow, thereby improving the separation efficiency. The side wings 21 are staggered on both sides of the separator plates 22, which can guide the airflow to deflect and contact the gas flow between adjacent separator plates 22. When the gas passes through the side wings 21, due to the design of the side wings 21, the airflow will impact the surface of the side wings 21 and generate a backflow vortex effect. This backflow vortex will cause larger oil particles in the airflow to lose kinetic energy, thereby being separated and gathered in a suitable position. The impact and backflow vortex effect effectively separate oil particles with a particle size greater than 3μm. These larger oil particles will be concentrated under the action of the impact separation structure 2 and converge into the oil return port 5. During the separation process, the kinetic energy of larger oil and gas particles is dissipated through repeated impact and rotation, allowing them to be captured and discharged. This prevents these particles from entering the subsequent fine separation structure, reducing the burden on the downstream structure. The impact separation structure 2 not only performs coarse separation but also effectively prevents excessive oil accumulation on the downstream fine separation structure. Without effective coarse separation, a large number of oil particles may re-aggregate during the fine separation stage, leading to a significant decrease in separation efficiency. The design of the impact separation structure 2 efficiently captures larger oil particles, ensuring that the fine separation stage can focus on smaller oil and gas particles, thereby improving the overall oil and gas separation effect.

[0035] In a preferred embodiment of this utility model, both the separation plate 22 and the side wing 21 are arc-shaped structures.

[0036] In a preferred embodiment of this utility model, the oil return port 25 utilizes the surface tension of the oil to seal the oil return port, so that when the separated oil accumulates to a certain extent, the oil falls back into the crankcase.

[0037] In a preferred embodiment of this utility model, the oil return port 4 uses an umbrella valve to seal the oil return hole. When the oil accumulates to a certain extent after separation, the oil falls back into the crankcase.

[0038] In a preferred embodiment of this utility model, the sealing surface 1 is made of nylon material by injection molding, which is low in cost and has better separation efficiency.

[0039] As a preferred embodiment of this utility model, refer to Figure 4-5The felt adsorption structure 3 includes a mounting base 37 disposed on the sealing surface 1. A perforated plate 31 is disposed on the top of the mounting base 37. A plurality of openings 310 are disposed on the perforated plate 31. An n-shaped adsorption shell 34 is disposed on the side of the perforated plate 31 away from the impact separation structure 2. A cover plate 33 is snapped onto the end of the adsorption shell 34 away from the perforated plate 31. The opening position of the openings 310 corresponds to the internal position of the adsorption shell 34.

[0040] In a preferred embodiment of this utility model, the side of the perforated plate 31 is provided with several spaced placement seats 35. The placement seats 35 have an L-shaped structure, and a felt component 36 is placed on the placement seat 35. Both the placement seat 35 and the felt component 36 are located inside the adsorption shell 34. Gas enters the adsorption shell 34 through the opening 310. The opening 310 reduces the inlet cross-sectional area of ​​the gas entering the adsorption shell 34, thereby increasing the gas flow rate and pressure. The size and distribution of the opening 310 on the perforated plate 31 are precisely calculated to effectively guide the airflow into the adsorption shell 34 and optimize the airflow distribution, ensuring that the felt component 36 can uniformly contact all gas flows. After the gas collides with the felt component 36, the felt component 36 adsorbs the oil in the gas, achieving fine separation of the gas. The snap-fit ​​design allows the cover plate 33 to be easily installed and disassembled, facilitating maintenance and cleaning.

[0041] The L-shaped mounting base 35 provides better support, preventing the felt component 36 from deforming or falling off in high-speed airflow and ensuring the long-term stability of the separation process. The felt component 36 utilizes the physical adsorption of felt fibers to effectively capture oil particles as gas passes through, achieving fine separation. Due to the fine structure and surface tension of the felt fibers, the felt can efficiently adsorb oil in the airflow, reducing oil particle contamination of engine emissions and internal machinery.

[0042] In a preferred embodiment of this invention, a gap is left between the side of the felt component 36 and the opening of the aperture 310, which helps to optimize the airflow distribution. When gas enters the adsorption housing 34 through the aperture 310, due to this gap, the airflow does not directly enter the felt component 36, but first expands and accelerates within the gap area. This gap reduces the local resistance to gas flow, making the airflow distribution more uniform and gradually slowing down the gas flow rate, so that the oil particles in the airflow can make sufficient contact with the felt component 36.

[0043] As the airflow velocity increases as it passes through the gap region, the contact between the gas and the felt component 36 becomes more intense, improving adsorption efficiency. This gap causes collisions and changes in the airflow before it enters the felt component 36, increasing the collision frequency between the gas and the felt fibers, thereby improving the adsorption efficiency of oil and gas particles. The change in airflow allows more tiny oil and gas particles to be guided towards the felt fibers by inertial force, increasing the oil particle capture rate.

[0044] If there is no gap between the felt component 36 and the opening 310, the airflow will directly enter the felt component 36, which may cause a large amount of oil particles to be deposited rapidly on the surface of the felt component, or even form an oil film on the surface of the felt, resulting in a decrease in adsorption effect. The design with gaps allows the airflow to have a wider contact area on the felt surface, avoiding excessive deposition of oil particles, thereby improving the service life and separation efficiency of the felt component.

[0045] The gap effectively reduces the local airflow resistance between the felt component 36 and the opening 310, ensuring airflow smoothness. Without the gap, the airflow might encounter significant pressure loss due to direct contact with the felt, resulting in excessively low gas velocity and affecting the separation effect. The gap design optimizes fluid dynamics, ensuring that the gas can pass through efficiently with low resistance, reducing energy loss, and guaranteeing good separation efficiency.

[0046] The gap design also promotes airflow turbulence. When airflow passes through the gap, due to the local acceleration and change in direction, oil and gas particles in the gas experience more disturbance and rotation at the gap, enhancing the separation efficiency of oil particles. The turbulence effect helps fine oil and gas particles to better contact and be adsorbed by the felt component 36, thereby improving the accuracy of oil-gas separation.

[0047] The presence of gaps effectively mitigates oil accumulation and hardening of the felt component 36 due to prolonged operation. Because the fibrous structure of the felt component possesses the ability to adsorb and capture oil and gas particles, the felt surface is easily and quickly covered if the airflow lacks gaps, resulting in decreased adsorption efficiency. However, through gap design, oil and gas particles in the airflow are evenly distributed, not only reducing deposition on the felt component surface but also extending its service life and reliability.

[0048] In a preferred embodiment of the present invention, a connecting buckle 38 is provided on the side of the cover plate 33 near the perforated plate 31, and the side of the connecting buckle 38 is engaged with the adsorption shell 34.

[0049] In a preferred embodiment of this utility model, a limiting hole is provided at the bottom of the cover plate 33, and a limiting rod 39 is provided on the side of the perforated plate 31. The end of the limiting rod 39 away from the perforated plate 31 corresponds to the opening position of the limiting hole. During the operation of the oil-gas separator, due to the high speed of the airflow and possible vibration, the cover plate 33 may face the risk of loosening or falling off. By providing the limiting hole and the limiting rod, the free movement of the cover plate 33 in the structure is restricted, ensuring that it always maintains precise alignment with the perforated plate 31. This positioning structure can effectively prevent relative movement between the cover plate 33 and the perforated plate 31, thereby ensuring that the normal flow path of the airflow is not disturbed, and also ensuring the sealing and stability of the oil-gas separator.

[0050] In a preferred embodiment of the present invention, a sealing gasket 32 ​​is provided on the side of the orifice plate 31 to seal the gap between the side of the orifice plate 31 and the inner wall of the valve chamber cover.

[0051] In a preferred embodiment of this invention, a reinforcing rib 7 is provided on the side of the sealing surface 1 away from the impact separation structure 2. This improves the overall mechanical strength, rigidity, stability, and durability of the sealing surface 1, ensuring the normal operation of the oil-gas separator under complex conditions such as high temperature, high pressure, and vibration. The reinforcing rib 7 not only effectively reduces the impact of thermal expansion, airflow impact, and vibration, but also improves the sealing performance and service life of the sealing surface 1. By optimizing the stress distribution, the uniformity and stability of the sealing surface 1 are enhanced, further improving the separation efficiency and overall reliability of the oil-gas separator. This design provides a more efficient and durable oil-gas separation effect under long-term, harsh working environments, and is an important guarantee for ensuring the long-term stable operation of the equipment.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A built-in oil-gas separator, comprising a sealing surface (1) assembled and installed with a valve cover, characterized in that, An air inlet (6) is provided on the sealing surface (1). An impact separation structure (2) and a felt adsorption structure (3) are installed on the side of the sealing surface (1) inside the valve chamber cover. An oil return port one (4) and an oil return port two (5) are provided on the sealing surface (1). The impact separation structure (2) is located between the felt adsorption structure (3) and the air inlet (6). The oil return port two (5) is located on the side of the impact separation structure (2) away from the air inlet (6). The oil return port one (4) is located on the side of the felt adsorption structure (3) away from the impact separation structure (2).

2. The built-in oil-gas separator according to claim 1, characterized in that, The impact separation structure (2) includes a plurality of separation plates (22) spaced apart on the sealing surface (1), and the two sides of the separation plates (22) are respectively provided with staggered side wings (21).

3. The built-in oil-gas separator according to claim 1, characterized in that, The felt adsorption structure (3) includes a mounting base (37) provided on the sealing surface (1), a perforated plate (31) is provided on the top of the mounting base (37), a plurality of openings (310) are provided on the perforated plate (31), an adsorption shell (34) is provided on the side of the perforated plate (31) away from the impact separation structure (2), and a cover plate (33) is snapped onto the end of the adsorption shell (34) away from the perforated plate (31); The opening position of the hole (310) corresponds to the internal position of the adsorption shell (34).

4. A built-in oil-gas separator according to claim 3, characterized in that, The side of the perforated plate (31) is provided with a number of spaced placement seats (35). The placement seats (35) are L-shaped and a felt component (36) is placed on the placement seats (35). Both the placement seats (35) and the felt component (36) are located inside the adsorption shell (34).

5. A built-in oil-gas separator according to claim 4, characterized in that, A gap is left between the side of the felt component (36) and the opening of the hole (310).

6. A built-in oil-gas separator according to claim 5, characterized in that, The cover plate (33) is provided with a connecting buckle (38) on the side near the perforated plate (31), and the side of the connecting buckle (38) is engaged with the adsorption shell (34).

7. A built-in oil-gas separator according to claim 6, characterized in that, The bottom of the cover plate (33) is provided with a limiting hole, and the side of the perforated plate (31) is provided with a limiting rod (39). The end of the limiting rod (39) away from the perforated plate (31) corresponds to the opening position of the limiting hole.

8. A built-in oil-gas separator according to claim 3, characterized in that, A sealing gasket (32) is provided on the side of the orifice plate (31) to seal the gap between the side of the orifice plate (31) and the inner wall of the valve chamber cover.

9. A built-in oil-gas separator according to claim 1, characterized in that, The sealing surface (1) is provided with a reinforcing rib (7) on the side away from the impact separation structure (2).

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