Passive oil-gas separator

Abstract

The passive oil-gas separator comprises a shell and a fine separation mechanism, a gas inlet, a coarse separation cavity, a fine separation cavity and a gas outlet cavity which are sequentially communicated are formed in the shell, the gas inlet, the fine separation cavity and the gas outlet cavity are sequentially distributed in the shell from right to left, and the fine separation mechanism is arranged in the fine separation cavity. The fine separation cavity is divided into an upper fine separation cavity and a lower fine separation cavity, an air channel from the air inlet to the coarse separation cavity is a first air channel, an air channel from the coarse separation cavity to the lower fine separation cavity is a second air channel, an air channel from the upper fine separation cavity to the lower fine separation cavity is a third air channel, an air channel from the lower fine separation cavity to the air outlet cavity is a fourth air channel, and the first air channel extends from top to bottom; the second air channel extends from bottom to top, the third air channel extends from top to bottom, the fourth air channel extends from bottom to top, the fine separation mechanism is arranged between the second air channel and the third air channel, the production process can be simplified, and the production efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the field of engine oil filtering devices, and particularly relates to a passive oil-gas separator. Background Art

[0002] The existing oil-gas separator adopts a straight-through air outlet structure. The oil and gas mixture that leaks into the oil-gas separator shell is coarsely separated and finely separated to obtain relatively clean gas to be discharged from the air outlet. If there is oil contamination mixed in the gas, there will be a risk of oil blowby in the short term, which will reduce the working efficiency of the oil-gas separator. In the long term, there will be problems such as excessive oil consumption and abnormal combustion, which will cause damage to the crankcase and engine. The existing electric-driven oil-gas separator is relatively bulky and costly. Summary of the invention

[0003] The utility model aims to provide a passive oil-gas separator, which can improve the separation efficiency of the oil-gas separator when it is working.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a passive oil-gas separator, which includes a shell and a fine separation mechanism, wherein the shell is formed with an air inlet, a coarse separation chamber, a fine separation chamber and an air outlet chamber which are connected in sequence, and the air inlet, the fine separation chamber and the air outlet chamber are distributed in sequence from right to left in the shell, and the fine separation mechanism is arranged in the fine separation chamber, and the fine separation chamber is divided into an upper fine separation chamber and a lower fine separation chamber, the airway from the air inlet to the coarse separation chamber is the first airway, the airway from the coarse separation chamber to the upper fine separation chamber is the second airway, the airway from the upper fine separation chamber to the lower fine separation chamber is the third airway, and the airway from the lower fine separation chamber to the air outlet chamber is the fourth airway, the first airway extends from top to bottom, the second airway extends from bottom to top, the third airway extends from top to bottom, and the fourth airway The duct extends from bottom to top, and the fine separation mechanism is arranged between the second air duct and the third air duct. When the blow-by gas enters the shell, it first enters the coarse separation chamber from top to bottom along the first air duct, and then enters the upper fine separation chamber from bottom to top along the second air duct, and then enters the lower fine separation chamber from top to bottom along the third air duct after passing through the fine separation mechanism, and finally enters the air outlet chamber from bottom to top along the fourth air duct, and oil and gas separation is completed in the second air duct, the fine separation mechanism and the fourth air duct; since the second air duct extends from bottom to top, large oil droplets in the blow-by gas will drip into the lower end of the second air duct, and the blow-by gas containing tiny oil droplets enters the upper fine separation chamber; after the blow-by gas containing tiny oil droplets is separated by the fine separation mechanism, the tiny oil droplets are blocked, and the filtered clean air enters the air outlet chamber, and the large oil droplets gathered on the fine separation mechanism will flow to the bottom of the lower fine separation chamber.

[0005] In another embodiment, the air inlet is located on the rear side wall of the shell and above the coarse separation chamber.

[0006] In another embodiment, a grille baffle is provided in the coarse separation chamber and below the air inlet, and a plurality of convex ridges are provided on the upper end surface of the grille baffle.

[0007] In another embodiment, each of the ridges is perpendicular to the rear side wall of the shell, and all of the ridges are distributed on the upper end surface of the grille baffle in sequence from right to left.

[0008] In another embodiment, a guide groove for guiding the large oil droplets separated in the rough separation chamber into the lower fine separation chamber is formed at the bottom of the rough separation chamber.

[0009] In another embodiment, the bottom of the lower fine separation chamber is provided with an oil return port for introducing the collected engine oil into the crankcase.

[0010] In another implementation manner, an oil return valve is provided on the oil return port.

[0011] In another embodiment, the fine separation mechanism includes a guide assembly formed in the shell, a transverse mounting seat that divides the fine separation chamber into an upper fine separation chamber and a lower fine separation chamber, a longitudinal partition and a felt valve installed on the transverse mounting seat, the guide assembly is arranged below the felt valve, the guide assembly includes a first guide plate located below the felt valve and a second guide plate located below the first guide plate, the middle portion of the first guide plate is recessed downward and a first guide port is provided in the middle portion, the second guide plate is U-shaped, the two sides of its bottom are lower than the middle portion, and second guide ports are provided on both sides of its bottom, the oil collected by the felt valve drips into the first guide plate, flows from the first guide port to the middle portion of the bottom of the second guide plate, and then flows from the second guide port to the bottom of the lower fine separation chamber, and flows back to the crankcase from the return oil valve.

[0012] In another embodiment, the felt valve includes a transversely arranged valve plate, a valve stem inserted into the valve plate and movable in the up and down directions, a valve sheet fixed below the valve stem, a felt sheet sleeved on the valve stem and located above the valve sheet, and a spring sleeved on the valve stem so that the valve stem always has a tendency to move upward. A hollow hole is provided on the valve sheet. When the valve sheet is not opened, the valve sheet completely covers the hollow hole from below. When the pressure in the upper fine separation chamber is too large, the valve sheet and the felt sheet are pushed open to achieve rapid pressure relief.

[0013] In another embodiment, an air outlet connecting the air outlet cavity and the lower fine separation cavity is provided on the side wall between the air outlet cavity and the lower fine separation cavity, and an anti-oil-channeling protrusion extending downward and used to prevent oil channeling is formed on the lower end surface of the side wall of the lower fine separation cavity around the air outlet. The risk of oil channeling at the air outlet can be reduced, and the anti-oil channeling protrusion at the air outlet effectively increases the flow distance, forcibly changes the flow direction of the airflow, and allows possible oil droplets to settle to the bottom shell along the anti-oil channeling protrusion, preventing oil channeling, achieving gas separation again, and allowing cleaner gas to flow to the air outlet.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: it can simplify the production process, improve production efficiency, and at the same time improve the separation efficiency of the oil and gas separator when it is working, and the overall structure is lightweight, low cost and high performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 A three-dimensional diagram of the present invention from another angle;

[0017] Figure 3 It is a three-dimensional diagram of the felt valve of the utility model;

[0018] Figure 4 This is an exploded view of the felt valve of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1-2 As shown, a passive oil-gas separator is connected to an engine and comprises a housing 2 and a fine separation mechanism 1.

[0020] An air inlet 21, a coarse separation chamber 22, a fine separation chamber and an air outlet chamber 25 which are connected in sequence are formed in the shell 2. The air inlet 21, the fine separation chamber and the air outlet chamber 25 are distributed in sequence from right to left in the shell 2. The fine separation mechanism 1 is arranged in the fine separation chamber, and the fine separation chamber is divided into an upper fine separation chamber 23 and a lower fine separation chamber 24. The airway from the air inlet 21 to the coarse separation chamber 22 is a first airway 31, the airway from the coarse separation chamber 22 to the upper fine separation chamber 23 is a second airway 32, the airway from the upper fine separation chamber 23 to the lower fine separation chamber 24 is a third airway 33, and the airway from the lower fine separation chamber 24 to the air outlet chamber 25 is a fourth airway 34. The first airway 31 extends from top to bottom, the second airway 32 extends from bottom to top, the third airway 33 extends from top to bottom, and the fourth airway 34 extends from bottom to top. The fine separation mechanism 1 is arranged between the second airway 32 and the third airway 33.

[0021] Specifically, the air inlet 21 is located on the rear side wall of the housing 2 and above the rough separation chamber 22. A grille baffle 26 is provided in the rough separation chamber 22 and below the air inlet 21, and a plurality of ridges are provided on the upper end surface of the grille baffle 26. Each ridge is perpendicular to the rear side wall of the housing 2, and all ridges are sequentially distributed on the upper end surface of the grille baffle 26 from right to left. A guide groove 27 for guiding the large oil droplets separated in the rough separation chamber 22 into the lower fine separation chamber 24 is formed at the bottom of the rough separation chamber 22. An oil return port 28 for guiding the collected engine oil into the crankcase is provided at the bottom of the lower fine separation chamber 24. An oil return valve 29 is provided on the oil return port 28.

[0022] The fine separation mechanism 1 includes a guide assembly formed in the shell 2, a transverse mounting seat 11 that divides the fine separation chamber into an upper fine separation chamber 23 and a lower fine separation chamber 24, a longitudinal partition 12 and a felt valve 13 installed on the transverse mounting seat 11. The guide assembly is arranged below the felt valve 13. The guide assembly includes a first guide plate 14 located below the felt valve 13 and a second guide plate 15 located below the first guide plate 14. The middle part of the first guide plate 14 is recessed downward and a first guide port 141 is opened in the middle part. The second guide plate 15 is U-shaped, and the two sides of its bottom are lower than the middle part, and second guide ports 151 are opened on both sides of its bottom. After the oil collected by the felt valve 13 drips into the first guide plate 14, it flows from the first guide port 141 to the middle part of the bottom of the second guide plate 15, and then flows from the second guide port 151 to the bottom of the lower fine separation chamber 24, and flows back to the crankcase from the return oil valve 29.

[0023] like Figure 3-4 As shown, the felt valve 13 includes a valve plate 16 laterally arranged on a transverse mounting seat 11, a valve stem 17 penetrated through the valve plate 16 and movable in the up and down directions, a valve disc 18 fixed below the valve stem 17, a felt disc 19 sleeved on the valve stem 17 and located above the valve disc 18, a spring 10 sleeved on the valve stem 17 so that the valve stem 17 always has an upward movement tendency, and a limit plate 110 fixed on the upper end of the valve stem 17 to prevent the spring 10 from falling off. A hollow hole 111 is provided on the valve plate 16 and the valve disc 18. When the valve disc 18 is not opened, the valve disc 18 completely covers the hollow hole from below. When the pressure in the upper fine separation chamber 23 is too large, the valve disc 18 and the felt disc 19 are pushed open to achieve rapid pressure relief.

[0024] An air outlet 20 connecting the air outlet cavity 25 and the lower fine separation cavity 24 is provided on the side wall between the air outlet cavity 25 and the lower fine separation cavity 24, and an anti-oil-channeling protrusion 210 extending downward and used to prevent oil channeling is formed on the lower end surface of the side wall of the lower fine separation cavity 24 around the air outlet 20. The risk of oil channeling at the air outlet can be reduced, and the anti-oil channeling protrusion of the air outlet 20 effectively increases the flow distance, forcibly changes the flow direction of the airflow, and allows possible oil droplets to settle to the bottom shell along the anti-oil channeling protrusion 210, thereby preventing oil channeling, achieving gas separation again, and allowing cleaner gas to flow to the air outlet.

[0025] When the blow-by gas enters the shell 2, it first enters the coarse separation chamber 22 from top to bottom along the first air channel 31, then enters the upper fine separation chamber 23 from bottom to top along the second air channel 32, and then enters the lower fine separation chamber 24 from top to bottom along the third air channel 33 after passing through the fine separation mechanism 1, and finally enters the air outlet chamber 25 from bottom to top along the fourth air channel 34, and completes oil and gas separation in the second air channel 32, the fine separation mechanism 1 and the fourth air channel 34; since the second air channel 32 extends from bottom to top, the large oil droplets in the blow-by gas will drip into the lower end of the second air channel 32, and the blow-by gas containing tiny oil droplets enters the upper fine separation chamber 23; after the blow-by gas containing tiny oil droplets is separated by the fine separation mechanism 1, the tiny oil droplets are blocked, and the filtered clean air enters the air outlet chamber 25, and the large oil droplets gathered on the fine separation mechanism 1 will flow to the bottom of the lower fine separation chamber 24.

[0026] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A passive oil-gas separator, comprising a housing and a fine separation mechanism, wherein an air inlet, a rough separation chamber, a fine separation chamber and an air outlet chamber are formed in the housing and are connected in sequence, wherein the air inlet, the fine separation chamber and the air outlet chamber are distributed in sequence from right to left in the housing, wherein the fine separation mechanism is disposed in the fine separation chamber and divides the fine separation chamber into an upper fine separation chamber and a lower fine separation chamber, wherein: The airway from the air inlet to the coarse separation chamber is the first airway, the airway from the coarse separation chamber to the upper fine separation chamber is the second airway, the airway from the upper fine separation chamber to the lower fine separation chamber is the third airway, and the airway from the lower fine separation chamber to the air outlet chamber is the fourth airway. The first airway extends from top to bottom, the second airway extends from bottom to top, the third airway extends from top to bottom, and the fourth airway extends from bottom to top. The fine separation mechanism is arranged between the second airway and the third airway.

2. The passive oil-gas separator according to claim 1, characterized in that: The air inlet is located on the rear side wall of the shell and above the rough separation chamber.

3. The passive oil-gas separator according to claim 1, characterized in that: A grille baffle is provided in the rough separation chamber and below the air inlet, and a plurality of convex ridges are provided on the upper end surface of the grille baffle.

4. The passive oil-gas separator according to claim 3, characterized in that: Each of the convex ridges is perpendicular to the rear side wall of the shell, and all of the convex ridges are distributed on the upper end surface of the grille baffle in sequence from right to left.

5. The passive oil-gas separator according to claim 1, characterized in that: A guide groove for guiding the large oil droplets separated in the rough separation chamber into the lower fine separation chamber is formed at the bottom of the rough separation chamber.

6. The passive oil-gas separator according to claim 1, characterized in that: An oil return port for introducing the collected engine oil into the crankcase is arranged at the bottom of the lower fine separation chamber.

7. The passive oil-gas separator according to claim 6, characterized in that: An oil return valve is arranged on the oil return port.

8. The passive oil-gas separator according to claim 1, characterized in that: The fine separation mechanism includes a guide assembly formed in the shell, a transverse mounting seat that divides the fine separation chamber into an upper fine separation chamber and a lower fine separation chamber, a longitudinal partition and a felt valve installed on the transverse mounting seat, the guide assembly is arranged below the felt valve, the guide assembly includes a first guide plate located below the felt valve and a second guide plate located below the first guide plate, the middle portion of the first guide plate is recessed downward and a first guide port is provided in the middle portion, the second guide plate is U-shaped, the two sides of the bottom are lower than the middle portion, and second guide ports are provided on both sides of the bottom.

9. The passive oil-gas separator according to claim 8, characterized in that: The felt valve includes a transversely arranged valve plate, a valve stem inserted into the valve plate and movable in the up and down directions, a valve sheet fixed under the valve stem, a felt sheet sleeved on the valve stem and located above the valve sheet, and a spring sleeved on the valve stem so that the valve stem always has a tendency to move upward. A hollow hole is provided on the valve sheet. When the valve sheet is not opened, the valve sheet completely covers the hollow hole from below. When the pressure in the upper fine separation chamber is too large, the valve sheet and the felt sheet are pushed open to achieve rapid pressure relief.

10. The passive oil-gas separator according to claim 1, characterized in that: An air outlet connecting the air outlet cavity and the lower fine separation cavity is provided on the side wall between the air outlet cavity and the lower fine separation cavity, and an anti-oil-buffering protrusion extending downward and used to prevent oil-buffering is formed on the lower end surface of the side wall of the lower fine separation cavity around the air outlet.

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