A multi-stage oil and gas separation method, application and device

Abstract

In order to solve the problem that the oil-gas separation in the prior art mostly adopts the method of lifting the oil-gas movement path, resulting in poor separation effect, the present invention provides a multi-stage oil-gas separation method, application and device, characterized in that it includes the following steps: bonding the high-temperature oil-gas mixture running upward with the lubricating oil running downward, and completing the oil-gas separation due to the affinity of the lubricating oil molecules. The present invention bonds the high-temperature oil-gas mixture running upward with the lubricating oil running downward, and completes the first-stage oil-gas separation due to the affinity of the lubricating oil molecules, effectively utilizing the free space of the oil return pipeline of the engine lubricating parts and the affinity of the lubricating oil to form the first-stage oil-gas separation function, expanding the new method of oil-gas separation; at the same time, it is supplemented by other oil-gas separation methods to further improve the oil-gas separation effect.

Description

Technical Field

[0001] The invention belongs to the field of engine oil-gas separation, and mainly relates to a multi-stage oil-gas separation method, application and device for an engine oil return pipeline. Background Art

[0002] The oil-gas separator is a device that separates the high-temperature oil-gas mixture in the engine crankcase into oil and gas. The device can effectively reduce the pressure in the crankcase. On the one hand, it prevents the crankcase pressure from being too high and affecting the operation of the diesel engine. On the other hand, it avoids the high-temperature oil-gas mixture in the crankcase from being directly discharged into the atmosphere to pollute the environment. At the same time, the oil separated by the oil-gas separator can be reused, effectively reducing the oil consumption rate. Common oil-gas separators have problems such as relatively single function, low oil-gas separation efficiency, large size, and complex structure, which cause great changes to the spatial layout of the diesel engine.

[0003] In order to improve the oil-gas separation efficiency of the high-temperature oil-gas mixture in the crankcase, the most common method is to improve the oil-gas movement path and separate the oil-gas through structures such as mazes. However, although the above technical means can play a certain role in oil-gas separation, the affinity of the lubricating oil itself is not taken into account. Blindly improving the oil-gas movement path increases the volume of the separator, but the oil-gas separation effect is not improved. Summary of the invention

[0004] In order to solve the problem that oil and gas separation in the prior art mostly adopts the method of lifting the oil and gas movement path, resulting in poor separation effect, the present invention provides a multi-stage oil and gas separation method, application and device.

[0005] In order to achieve the above-mentioned purpose, the specific scheme adopted by the present invention is: a multi-stage oil-gas separation method, characterized in that it includes the following steps: bonding the upward-running high-temperature oil-gas mixture with the downward-running lubricating oil, and completing the oil-gas separation due to the affinity of the lubricating oil molecules.

[0006] A multi-stage oil-gas separation method comprises the following steps:

[0007] S1. Collect the high-temperature oil-gas mixture output from the crankcase;

[0008] S2. The high-temperature oil-gas mixture obtained in step S1 is brought into positive contact with the lubricating oil flowing downward from the engine parts in a closed space to obtain the oil and gas after the first stage of separation;

[0009] S3. The oil and gas separated in the first stage obtained in step S2 are passed through an oil and gas separation labyrinth to obtain the oil and gas separated in the second stage;

[0010] S4. The oil and gas obtained after the second stage separation in step S3 are separated through a wire mesh, and finally the oil and gas are completely separated, and the separated lubricating oil flows back into the crankcase.

[0011] The multi-stage oil-gas separation device comprises a first-stage separation component for connecting the oil-gas mixture and re-flowing the separated lubricating oil into the crankcase, a second-stage separation component for performing labyrinth separation on the mixed gas output by the first-stage separation component, a third-stage separation component for performing filter separation on the mixed gas output by the second-stage separation component, and an oil-gas separator housing for arranging the first-stage separation component, the second-stage separation component, and the third-stage separation component;

[0012] Wherein, the first-stage separation component comprises a circular pipe I and a circular pipe II which are connected and arranged on the oil-gas separator housing;

[0013] Wherein, the circular pipe I is connected to the lubricating oil return pipeline;

[0014] Wherein, the circular tube II is connected to the engine crankcase;

[0015] Among them, the circular tube I and the circular tube II are respectively arranged on both sides of the oil-gas separator shell, and are used to make the mixed gas transmitted by the circular tube II collide positively with the lubricating oil falling from the circular tube I inside the oil-gas separator shell, and use the affinity of the lubricating oil to complete the first-level oil-gas separation.

[0016] The ends of the circular tube I or the circular tube II are respectively connected to the lubricating oil return pipeline or the engine crankcase through a connecting assembly; wherein the connecting assembly includes a connecting piece and a connecting pipe; the connecting piece is arranged between the circular tube I and the connecting pipe I, and the connecting pipe I is connected to the lubricating oil return pipeline; or, the connecting piece is arranged between the circular tube II and the connecting pipe II, and the connecting pipe II is connected to the engine crankcase.

[0017] The second-stage separation component includes at least two rib plates I and at least two rib plates II arranged inside the oil-gas separator housing; wherein the rib plates I and the rib plates II are staggered to form a labyrinth separation structure; wherein the rib plate I is arranged close to one side of the circular tube I and the rib plate II is arranged close to one side of the circular tube II.

[0018] The third-stage separation component includes a round tube III, a cross-ribbed plate arranged in the round tube III, and a wire mesh arranged between the cross-ribbed plates; wherein one end of the round tube III is connected to the oil-gas separator housing and is located behind the second-stage separation component, and is used to collect the mixed oil and gas output by the second-stage separation component;

[0019] Wherein, the steel wire mesh is located between the cross rib plates and is arranged away from the oil-gas separator housing.

[0020] Beneficial effects: The present invention bonds the upward-running high-temperature oil-gas mixture with the downward-running lubricating oil, completes the first-stage oil-gas separation due to the affinity of the lubricating oil molecules, effectively utilizes the spare space in the oil return pipeline of the engine lubricating parts and the affinity of the lubricating oil, forms the first-stage oil-gas separation function, and expands the new method of oil-gas separation; at the same time, it is assisted by other oil-gas separation methods to further improve the oil-gas separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the oil-gas separator housing in the present invention;

[0022] Figure 2 for Figure 1 A top view of

[0023] Figure 3 It is a schematic diagram of the end cover structure in the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the connecting piece in the present invention;

[0025] Figure 5 This is a schematic diagram of the installation structure of the present invention.

[0026] In the figure: 1. Oil-gas separator housing; 2. End cover; 3. Connector; 4. Wire mesh; 5. Connecting pipe I; 6. Connecting pipe II; 7. O-ring I; 8. O-ring II;

[0027] 9. Fastening bolts; 1-1. Rib plate I; 1-2. Rib plate II; 1-3. Round tube I;

[0028] 1-4, round tube II; 1-5, round tube III; 1-6, round flange; 1-7, threaded through hole;

[0029] 1-8, circular through hole; 1-9, cross rib plate; 1-10, wire mesh installation space;

[0030] 1-11. End cover installation space; 1-12. Inverted U-shaped hole. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] The multi-stage oil-gas separation method is characterized by comprising the following steps:

[0033] The high-temperature oil-gas mixture running upward is bonded with the lubricating oil running downward, and the oil-gas separation is completed due to the affinity of the lubricating oil molecules.

[0034] Specifically, the multi-stage oil-gas separation method is applied to the engine oil return pipeline and includes the following steps:

[0035] S1. Collect the high-temperature oil-gas mixture output from the crankcase;

[0036] S2. The high-temperature oil-gas mixture obtained in step S1 is brought into positive contact with the lubricating oil flowing downward from the engine parts in a closed space to obtain the oil and gas after the first stage of separation;

[0037] S3. The oil and gas separated in the first stage obtained in step S2 are passed through an oil and gas separation labyrinth to obtain the oil and gas separated in the second stage;

[0038] S4. The oil and gas obtained after the second stage separation in step S3 are separated through a wire mesh, and finally the oil and gas are completely separated, and the separated lubricating oil flows back into the crankcase.

[0039] When the engine is running, the lubricating oil of the engine parts flows downward, and the high-temperature oil-gas mixture in the crankcase flows upward. Due to the affinity of the lubricating oil molecules, part of the oil in the high-temperature oil-gas mixture will adhere to the downward-flowing lubricating oil and fall into the crankcase, forming the first-level oil-gas separation function.

[0040] Specific embodiment I: Figures 1 to 5 , a multi-stage oil-gas separator for an engine oil return line, such as Figure 5 As shown, it mainly includes: an oil-gas separator housing 1, an end cover 2, a connecting piece 3, a wire mesh 4, a connecting pipe I 5, a connecting pipe II 6, an O-ring I 7, an O-ring II 8, and a fastening bolt 9.

[0041] The oil-gas separator housing 1 is as Figure 1 and 2As shown, the main body is a rectangular parallelepiped with a hollow interior, and the middle part is designed with two rib plates Ⅰ1-1 arranged vertically and staggered on the top surface and two rib plates Ⅱ1-2 perpendicular to the bottom surface; the rib plates Ⅰ1-1 and rib plates Ⅱ1-2 play the role of strengthening the oil-gas separator shell on the one hand, and form an oil-gas separation maze on the other hand; an inverted U-shaped hole 1-12 is designed in the middle of the bottom of the rib plate Ⅱ1-2, and the inverted U-shaped hole 1-12 serves as a flow hole for separating oil; the top and bottom of the left side of the oil-gas separator shell 1 are designed with round tubes Ⅰ1-3 and round tubes Ⅱ1-4; the internal round holes of the round tubes Ⅰ1-3 and round tubes Ⅱ1-4 have the same diameter and are connected to the inside of the oil-gas separator shell 1; the round tubes Ⅰ1-3 and round tubes Ⅱ1-4 are used for the installation of the connector 3, the oil-gas separator A circular tube III1-5 is designed on the right side of the shell 1; a circular flange 1-6 is designed on the top of the circular tube III1-5, and six evenly distributed threaded through holes 1-7 are designed perpendicular to the circular flange 1-6; the circular flange 1-6 and the threaded through holes 1-7 are used for the installation of the end cover 2, and a number of circular through holes 1-8 with equal spacing are designed on the top of the oil-gas separator shell 1 corresponding to the inner hole of the circular tube III1-5; the circular through holes 1-8 serve as the oil-gas mixer channel on the one hand, and prevent the wire mesh from falling into the oil-gas separator shell 1 on the other hand; a cross rib plate 1-9 is designed inside the circular tube III1-5, and the cross rib plate 1-9 decomposes the inside of the circular tube III1-5 into four wire mesh installation spaces 1-10 and an end cover installation space 1-11; the end cover 2 is as shown in FIG. Figure 3 As shown, the main body is divided into three parts. The lower part is an internal hollow cylinder. An O-ring groove is designed in the middle of the cylinder for installing the O-ring II 8. The middle part is a circular flange with a circular through hole in the middle. Its outer dimensions are the same as the circular flange 1-6 on the oil-gas separator housing 1, and six evenly distributed light holes are designed perpendicular to the circular flange 1-6 to match the position and specifications of the threaded through holes 1-7. The upper part is an exhaust elbow. The end cover 2 is installed on the circular flange 1-6. On the one hand, it plays a role in installing and positioning the wire mesh, and on the other hand, it serves as an exhaust channel for the multi-stage oil-gas separator.

[0042] Connector 3 Figure 4 As shown, the main body is divided into three parts, which are symmetrically designed as a cylindrical structure from top to bottom. An O-ring groove is designed on the cylinder for installing the O-ring I. The middle part is designed as a truncated cone structure for installing and positioning the connecting piece 3. The interior of the connecting piece 3 is designed as a circular through hole as an oil and gas circulation channel; there are four steel meshes 4, which are installed in the mesh installation space 1-10 of the oil-gas separator housing 1 to separate the high-temperature oil and gas mixture.

[0043] The connecting pipe Ⅰ5 is installed on the upper part of the circular pipe Ⅰ1-3 of the oil-gas separator housing 1 through the connecting piece 3. Its inner diameter is the same as the inner diameter of the circular pipe Ⅰ1-3. The connecting pipe Ⅰ5 is the lubricating oil return pipeline of the engine lubricating parts, and serves to connect the engine lubricating parts with the oil-gas separator housing 1.

[0044] The connecting pipe II6 is installed at the lower part of the round pipe II1-4 of the oil-gas separator housing 1 through the connecting piece 3, and its inner diameter is the same as that of the round pipe II1-4. The connecting pipe II6 serves to connect the oil-gas separator housing 1 with the engine crankcase.

[0045] There are four O-rings Ⅰ7, which are installed in the O-ring grooves in the middle of the upper and lower cylinders of the connecting piece 3, and play a sealing role between the connecting piece 3 and the connecting pipe Ⅰ5, the connecting pipe Ⅱ6 and the oil-gas separator housing 1; there is one O-ring Ⅱ8, which is installed on the O-ring groove in the middle of the lower cylinder of the end cover 2, and plays a sealing role between the end cover 2 and the oil-gas separator housing 1.

[0046] There are six fastening bolts 9 , whose thread specifications match the threaded through holes 1 - 7 of the oil-gas separator housing 1 , and are used to connect the end cover 2 and the oil-gas separator housing 1 .

[0047] The assembly process of the present invention is as follows: first, install the O-ring II 8 in the O-ring groove in the middle of the lower cylinder of the end cover 2, fasten the end cover 2 to the circular flange 1-6 of the oil-gas separator housing 1 by means of the fastening bolts 9, install the O-ring I7 in the O-ring groove in the middle of the upper and lower cylinders of the connecting piece 3, insert the connecting piece 3 into the inner holes of the circular tubes I1-3 and II1-4 of the oil-gas separator housing 1, insert the connecting pipes I5 and II6 into the connecting piece 3, and install them on the upper and lower circular tubes I1-3 and II1-4 of the oil-gas separator housing 1.

[0048] When the engine is running, the lubricating oil of the engine parts flows downward, and the high-temperature oil-gas mixture in the crankcase flows upward. Due to the affinity of the lubricating oil molecules, part of the oil in the high-temperature oil-gas mixture will adhere to the lubricating oil flowing downward and fall into the crankcase, forming the first-stage oil-gas separation function; the high-temperature oil-gas mixture after the first-stage separation enters the maze formed by the rib plates Ⅰ1-1 and rib plates Ⅱ1-2. The high-temperature oil-gas mixture changes direction several times in the maze formed by the rib plates Ⅰ1-1 and rib plates Ⅱ1-2, and oscillates and collides back and forth. Part of the oil in the high-temperature oil-gas mixture will flow along the rib plates Ⅰ1-1 , and flows down through the rib plate II 1-2 and into the crankcase, forming a second-stage oil-gas separation function; the high-temperature oil-gas mixture after two-stage separation enters the circular tube III 1-5, and a steel mesh 4 is installed inside the circular tube III 1-5. The oil molecules that cannot be separated in the high-temperature oil-gas mixer enter the steel mesh and will stick to the steel mesh to form oil molecule droplets. The oil molecule droplets will gradually increase in size. When the weight of the oil molecule droplets is greater than the surface tension of the steel mesh on the droplets, the oil droplets will fall along the wire mesh, forming a third-stage oil-gas separation function. The separated oil will pass through the inverted U-shaped through hole at the bottom of the rib plate II 1-2 and flow into the crankcase.

[0049] The present invention has a multi-stage oil-gas separation function and a high oil-gas separation efficiency; the entire structure adopts a pipeline-free design, with high integration, compact structure and small size; the end cover 2 can rotate at an angle of 60°, so that the exhaust elbow can be flexibly oriented and adaptable to various working conditions; the seals used in the present invention are all O-rings, which are easy to install and operate, and have high reliability. The present invention effectively benefits the free space of the oil return pipeline of the engine lubricating parts and the affinity of the lubricating oil, forming a first-stage oil-gas separation function, on the one hand increasing the utilization rate of the oil return pipeline, and on the other hand reducing the complexity of the pipeline.

[0050] It should be noted that the directional descriptions involved in the present invention are as follows: Figure 5 shall prevail.

[0051] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the protection scope of the present invention.

Claims

1. A multi-stage oil-gas separation method, characterized in that: A multi-stage oil-gas separation device, comprising a first-stage separation component for connecting an oil-gas mixture and re-flowing the separated lubricating oil into a crankcase, a second-stage separation component for performing labyrinth separation on the mixed gas output by the first-stage separation component, a third-stage separation component for performing filter separation on the mixed gas output by the second-stage separation component, and an oil-gas separator housing for arranging the first-stage separation component, the second-stage separation component, and the third-stage separation component; The main body of the oil-gas separator housing is a hollow rectangular parallelepiped. Wherein, the first-stage separation component comprises a circular tube I connected to the left top of the oil-gas separator housing and a circular tube II connected to the left bottom, and the internal circular holes of the circular tubes I and II have the same diameter; Wherein, the circular pipe I is connected to the lubricating oil return pipeline; Wherein, the circular tube II is connected to the engine crankcase; The circular tube I and the circular tube II are arranged on both sides of the oil-gas separator housing, and are used to positively collide the mixed gas transmitted by the circular tube II with the lubricating oil falling from the circular tube I inside the oil-gas separator housing, and utilize the affinity of the lubricating oil to complete the first-level oil-gas separation; The second-stage separation assembly includes at least two rib plates I arranged in a staggered manner on the vertical top surface in the middle of the oil-gas separator housing body and at least two rib plates II arranged in a staggered manner perpendicular to the bottom surface; The rib plate I and the rib plate II are staggered to form a labyrinth separation structure; the rib plate I is arranged close to one side of the circular tube I and the rib plate II is arranged close to one side of the circular tube II; The rib plate II is provided with an inverted U-shaped hole for oil drainage at the lower part close to the oil-gas separator housing; The multi-stage oil and gas separation method comprises the following steps: S1. Collect the high-temperature oil-gas mixture output from the crankcase; S2. The high-temperature oil-gas mixture obtained in step S1 is brought into positive contact with the lubricating oil flowing downward from the engine parts in a closed space to obtain the oil and gas after the first stage of separation; S3. The oil and gas separated in the first stage obtained in step S2 are passed through an oil and gas separation labyrinth to obtain the oil and gas separated in the second stage; S4. The oil and gas obtained after the second stage separation in step S3 are separated through a wire mesh, and finally the oil and gas are completely separated, and the separated lubricating oil flows back into the crankcase.

2. A multi-stage oil-gas separation method according to claim 1, characterized in that: The ends of the round tube I or the round tube II are respectively connected to the lubricating oil return pipeline or the engine crankcase through a connecting assembly; Wherein, the connecting component includes a connecting piece and a connecting pipe; the connecting piece is arranged between the round pipe I and the connecting pipe I and the connecting pipe I is connected to the lubricating oil return pipeline; or, the connecting piece is arranged between the round pipe II and the connecting pipe II and the connecting pipe II is connected to the engine crankcase.

3. A multi-stage oil-gas separation method according to claim 2, characterized in that: The third-stage separation assembly includes a round tube III, a cross-ribbed plate arranged in the round tube III, and a wire mesh arranged between the cross-ribbed plates; Among them, one end of the circular pipe III is connected to the oil-gas separator housing and is located behind the second-stage separation component, and is used to collect the mixed oil and gas output by the second-stage separation component; Wherein, the steel wire mesh is located between the cross rib plates and is arranged away from the oil-gas separator housing.

4. A multi-stage oil-gas separation method according to claim 3, characterized in that: The circular position area where the oil-gas separator housing is connected to the circular pipe III is evenly distributed with circular through holes for ventilation.

5. A multi-stage oil-gas separation method according to claim 4, characterized in that: The other end of the circular tube III has a detachable connecting end cap; Wherein, the end cap and the circular tube III can be connected in a 60° adjustable direction.

6. Application of the multi-stage oil-gas separation method as claimed in claim 1 in an engine oil return pipeline.

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