An oil return structure for an oil and gas separator

Abstract

The application discloses an oil-gas separator oil return structure arranged on an active oil-gas separator, and the oil-gas separator comprises a separation module and a separation cavity, and the oil-gas separator oil return structure comprises a separation plate arranged on one side of the separation cavity, wherein one end of the separation plate is provided with a separation groove extending to the side of the separation module, and the outflow end of the separation groove is provided with an oil return hole in correspondence. The separation groove extending to the separation module is arranged on the separation plate, the separation groove plays a role of blocking and converging the oil liquid discharged from the separation module, more oil liquid separated from the separation module can be collected, the oil liquid is prevented from circulating back to the separation module, the oil return area and the oil return height are increased, and the separation efficiency and the oil return efficiency of the oil-gas separator are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil-gas separators, in particular to an oil-gas separator oil return structure. BACKGROUND

[0002] With the continuous progress of engine technology, the working condition of the engine is also getting stronger and stronger, and the oil vapor intrusion into the intake system caused by the crankcase ventilation system makes the engine carbon deposition a common problem. The oil-gas separator can solve such problems, so that the entire engine intake system including the throttle valve, intake manifold, intake port and intake valve remains dry and oil-free, fundamentally eliminating the generation of intake system carbon deposition. In China, patent No. CN2020100946663, a kind of active oil-gas separator was disclosed on July 10, 2020, which is designed by our company to improve the oil-gas separation efficiency. As shown in Figure 1 , it includes a driven separation module 100 and a separation cavity 200, and the separation module includes an impeller which can throw out oil and gas when the impeller is driven to rotate, thereby improving the separation efficiency.

[0003] In use, our company found that in oil-gas separation, only the oil that hits the side wall of the separation cavity vertically has high oil return efficiency, and when it hits the corners of the separation cavity or hits the side wall of the separation cavity obliquely, the oil does not enter the oil return cavity and continues to enter the separation module, which obviously reduces the separation efficiency and oil return efficiency of the oil-gas separator. SUMMARY

[0004] Based on the above shortcomings in the prior art, the present application discloses an oil-gas separator oil return structure for use in an active oil-gas separator, which increases the oil return height and greatly improves the separation efficiency and oil return efficiency of the oil-gas separator.

[0005] To achieve the above-mentioned purpose, the present application proposes the following technical scheme.

[0006] An oil-gas separator oil return structure is provided on an active oil-gas separator, and the oil-gas separator includes a separation module and a separation cavity, characterized in that the oil-gas separator oil return structure includes a separation plate, the separation plate is arranged on one side of the separation cavity, one end of the separation plate is provided with a separation groove extending towards the side where the separation module is located, and the outflow end of the separation groove is provided with an oil return hole.

[0007] The present application provides a separation groove extending towards the separation module on the separation plate, which plays a role in blocking and converging the oil thrown out by the separation module, can guide more oil separated from the separation module, avoids the recirculation of these oils in the separation module, increases the oil return area and height, and greatly improves the separation efficiency and oil return efficiency of the oil-gas separator.

[0008] Preferably, the separation plate is provided with a gas passage and an oil return cavity, a partition plate is arranged between the gas passage and the oil return cavity, one end of the gas passage is provided with an exhaust cavity with a smaller depth than the gas passage, an exhaust port is arranged in the exhaust cavity, and a transition surface is arranged between the exhaust cavity and the gas passage. The partition plate separates the gas passage and the oil return cavity, facilitating the separate discharge of separated oil and gas. The exhaust cavity reduces the area of the gas overflow position, and the gas entering the exhaust cavity from the large-section gas passage will have increased pressure and flow rate, thereby improving the gas discharge efficiency.

[0009] Preferably, the separation groove comprises a connecting groove arranged parallel to the axis of the separation module, and a plurality of branch grooves are arranged in communication on the connecting groove, the branch grooves are arranged on the side of the connecting groove facing the oil return hole, and the branch grooves are arranged in parallel. The connecting groove and the branch grooves form a composite channel, which can multi-stage return and liquefy oil, thereby improving the oil return efficiency of the separated oil; the branch grooves are arranged in parallel, each branch groove can independently play a flow guiding role, and the oil and gas flow multiple times in the branch grooves, thereby being completely liquefied and having high return efficiency.

[0010] Preferably, the connecting groove is a straight groove, and the two side walls of the connecting groove are parallel. The connecting groove can be connected to the upper and lower ends, and the height of the side wall of the connecting groove not connected to the branch groove is large, which can provide a large liquid blocking area in the transverse direction and has a good material blocking effect.

[0011] Preferably, the branch groove is arranged in an inclined downward manner, and the included angle between the branch groove and the horizontal plane is between 5 degrees and 15 degrees. Since the branch groove is arranged in an inclined downward manner, the oil in the branch groove will automatically flow out under the action of gravity, thereby avoiding liquid accumulation in the branch groove. If the included angle is too small, the oil will flow out slowly, and if the included angle is too large, the oil will be difficult to enter the branch groove, and the effect of the branch groove will not be so significant. Limiting the included angle to be between 5 degrees and 15 degrees can take into account both aspects.

[0012] Preferably, the side wall of the branch groove is in the shape of a right triangle. The height of the side wall of the branch groove gradually decreases away from the connecting groove. This ensures the flow blocking and liquefaction capacity of the branch groove. If the side wall of the branch groove is too thick and has a large area, only a part of the side wall of the branch groove will play a flow blocking role, the oil will be difficult to flow to the connecting groove, the flow converging effect will be poor, and there will be a problem of excessive liquid accumulation on the side wall of the branch groove. The right triangular structure of the side wall of the branch groove of the present application ensures the flow converging and flow blocking capacity, and because the area of the side wall is small, the oil can easily reach the bottom of the branch groove for flow convergence, liquid accumulation on the side wall of the branch groove is difficult, and the oil return effect is improved.

[0013] As preferred, the groove wall of the branch groove intersects with the groove wall of one side of the connecting groove, the adjacent branch grooves are arranged at intervals, and the groove wall between the adjacent branch grooves and the groove wall of one side of the connecting groove form a one-way auxiliary groove. The gap between the groove walls between the branch grooves cooperates with the groove wall of the connecting groove to form a one-way auxiliary groove with a one-way opening, which plays a one-way flow role of separating and independent grooves through the one-way auxiliary groove, and improves the separation efficiency of the separation groove.

[0014] As preferred, the oil return hole is located at the upper end of the oil return cavity. The oil in the oil return cavity is collected to a certain extent before being returned, thereby ensuring the quality of oil return.

[0015] As preferred, the opening of the branch groove faces the side where the separation module is located. The oil hit by the rotating separation module can enter the separation groove from the opening of the branch groove, thereby ensuring the oil separation function of the separation groove.

[0016] As preferred, four branch grooves are arranged on the connecting groove, and the oil return hole is arranged at the end of the second branch groove from top to bottom. The first branch groove and the second branch groove from top to bottom are located at the upper end of the oil return cavity and have a high height. If the oil flowing from the first branch groove and the second branch groove from top to bottom flows to the bottom of the oil return cavity, the path is too long, which is not conducive to oil-gas separation. Therefore, the preferred arrangement can directly guide the oil returned from the second branch groove and the first branch groove from top to bottom to the oil return hole, reduce the possibility of oil recirculation into the separation module, and improve the oil-gas separation efficiency of the oil-gas separator.

[0017] The beneficial effects of the present application are that the separation groove plays a role of flow blocking and flow converging of the oil hit by the separation module, can guide more oil separated from the separation module, avoids the recirculation of the oil into the separation module, increases the oil return area and the oil return height, and greatly improves the separation efficiency and the oil return efficiency of the oil-gas separator. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structure schematic diagram of an active oil-gas separator in the prior art.

[0019] Figure 2 is a schematic diagram of the installation structure of the present application in an oil-gas separator.

[0020] Figure 3 is a front view of the present application.

[0021] Figure 4 is a back side view of the present application.

[0022] Figure 5 is Figure 4 a bottom view.

[0023] Figure 6 is Figure 4 a left view.

[0024] Figure 7 This is a schematic diagram of the separation tank in this invention.

[0025] In the diagram: Oil-gas separator 1, Separation module 101, Separation chamber 102, Separation plate 103, Gas outlet chamber 21, Exhaust chamber 22, Exhaust port 23, Transition surface 24, Oil return chamber 31, Separation groove 32, Oil return hole 33, Oil return pipe 34, Connection groove 35, Branch groove 36, One-way auxiliary groove 37, Separator plate 41. Detailed Implementation

[0026] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0027] Example 1,

[0028] An oil return structure for an oil-gas separator, installed in such a way as Figure 1 On the active oil-gas separator 1 shown, Figure 1 The oil-gas separator 1 includes a separation module 101 and a separation chamber 102, such as Figures 2 to 7 As shown, the oil-gas separator 1's return oil structure includes a separation plate 103, which is sealed and connected to one side of the separation chamber 102. The separation plate 103 has a gas outlet chamber 21 and an oil return chamber 31, with a partition plate 41 between them. One end of the gas outlet chamber 21 has an exhaust chamber 22 with a depth less than the gas outlet chamber 21, and an exhaust port 23 within the exhaust chamber 22. An inclined transition surface 24 is provided between the exhaust chamber 22 and the gas outlet chamber 21. One end of the separation plate 103 has a separation groove 32 extending towards the side where the separation module 101 is located, and the separation groove 32 is positioned on the oil return chamber 31. A return oil hole 33 is correspondingly provided at the outlet end of the separation groove 32. The return oil hole 33 is located at the upper end of the oil return chamber 31. On the side of the separation plate 103 opposite to the separation groove 32, a return oil pipe 34 corresponding to the return oil hole 33 is provided for easy pipe connection.

[0029] The separation groove 32 comprises a connecting groove 35 which is a straight groove with two parallel groove walls. The connecting groove 35 is parallel to the axis of the separation module 101 and is in a vertical state when the separation plate 103 is assembled on the oil-gas separator 1. The plane of the groove wall of the connecting groove 35 is parallel to the axis of the oil return hole 33. Four branch grooves 36 are arranged on the connecting groove 35 in communication. The branch grooves 36 are also straight grooves. The branch grooves 36 are located on the side of the connecting groove 35 facing the oil return hole 33 and are arranged in parallel. The branch grooves 36 are arranged in an inclined downward manner and the included angle between the branch grooves 36 and the horizontal plane is 10 degrees. The oil return hole 33 corresponds to the end of the second branch groove 36 from top to bottom. The groove wall of the branch groove 36 is in the shape of a right triangle. The height of the groove wall of the branch groove 36 gradually decreases away from the connecting groove 35. The groove wall of the branch groove 36 intersects with the groove wall on one side of the connecting groove 35, and the opening of the branch groove 36 faces the side where the separation module 101 is located. Adjacent branch grooves 36 are arranged in a spaced manner, and the groove wall between adjacent branch grooves 36 and the groove wall on one side of the connecting groove 35 forms a one-way auxiliary groove 37. The position and structure of the separation groove 32 can also effectively avoid interference with the separation module 101 and ensure the stability of the operation of the separation module 101.

[0030] In application, the separation plate 103 is fixed to the oil-gas separator 1. After the oil-gas enters the oil-gas separator 1, the separation module 101 rotates to realize the dispersion and separation of the oil-gas. The oil liquid is heavy and stays in the lower layer, and the gas stays in the upper layer, that is, the gas enters the gas cavity 21 after separation, and the oil liquid corresponds to the oil return cavity 31. After the oil liquid is thrown out of the separation module 101, part of it hits the wall surface of the oil return cavity 31 and flows downward, and part of it is hit on the separation groove 32. The separation groove 32 directly blocks and converges the flow and guides the oil liquid to the return flow cavity, avoiding the oil liquid from entering the separation module 101 for separation and circulation, thereby greatly improving the return efficiency of the oil-gas separator 1, avoiding the functional failure problem caused by the accumulation of oil in the oil-gas separator 1, and being easy to process in production and manufacturing, with high product life.

Claims

1. An oil return structure of an oil-gas separator, provided on an active oil-gas separator, the oil-gas separator comprising a separation module and a separation cavity, characterized in that, The oil return structure of the oil-gas separator comprises a separation plate arranged on one side of a separation cavity, and a separation groove extending to the side where the separation module is arranged is arranged at one end of the separation plate, and an oil return hole is arranged at the outflow end of the separation groove; The separation groove comprises a connecting groove arranged in parallel to the axis of the separation module, a plurality of branch grooves are arranged in communication on the connecting groove, the branch grooves are arranged on the side of the connecting groove facing the oil return hole, and the branch grooves are arranged in parallel to each other, the connecting groove is a straight groove, the groove walls on both sides of the connecting groove are parallel, and the groove walls of the branch grooves are in the shape of a right triangle; the height of the groove walls of the branch grooves gradually decreases away from the connecting groove.

2. The oil separation device according to claim 1, wherein The separation plate is internally provided with a gas passage and an oil return cavity, a partition plate is arranged between the gas passage and the oil return cavity, one end of the gas passage is provided with a gas discharge cavity with a smaller depth than the gas passage, a gas discharge port is arranged in the gas discharge cavity, and a transition surface is arranged in an inclined manner between the gas discharge cavity and the gas passage.

3. The oil separator oil return structure of claim 1, wherein, The connecting groove is in communication with the upper and lower ends thereof, and the height of the side wall of the connecting groove not connected with the branch grooves is large.

4. The oil separation device of claim 1, wherein the oil return structure is formed by a plurality of grooves formed on the inner surface of the cylindrical body. The branch grooves are arranged in an inclined downward manner, and the included angle between the branch grooves and the horizontal plane is between 5 degrees and 15 degrees.

5. The oil separator oil return structure of claim 1, wherein The groove walls of the branch grooves intersect with the groove wall on one side of the connecting groove, the adjacent branch grooves are arranged in a spaced manner, and the groove walls between the adjacent branch grooves and the groove wall on one side of the connecting groove form a one-way auxiliary groove.

6. The oil separation structure of claim 1, wherein, The oil return hole is located at the upper end of the oil return cavity.

7. The oil separation structure of claim 1, wherein, The opening of the branch groove faces the side where the separation module is arranged.

8. The oil separation structure of claim 1, wherein, Four branch grooves are arranged on the connecting groove, and the oil return hole is arranged at the end of the second branch groove from top to bottom.

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