Efficient low-resistance multi-stage oil-gas separation device

Abstract

The utility model belongs to the technical field of engines, and relates to a high-efficiency low-resistance multistage oil-gas separation device. The multi-stage oil-gas separation device is provided with a shell; the shell is of a cylindrical structure with the upper end and the lower end opened. The center of the through hole of the lower cover of the shell is provided with a fastening bolt fixed with the lower cover; an air inlet pipe communicated with the through hole is fixed at the lower end of the lower cover; a rotary guide vane assembly is arranged in the shell; the rotary guide vane assembly is provided with a rotary vane mounted on a fastening bolt; a filter element assembly located in the shell is arranged above the guide vane assembly; the upper end of an air outlet pipe of the filter element assembly extends out of the shell; a secondary filter element is filled in the filter screen of the air outlet pipe; the outer side of the part, located in the shell, of the air outlet pipe is sleeved with a first-stage filter element shell; a second-stage filter element is filled between the first-stage filter element shell and the air outlet pipe; and the first-stage filter element is communicated with the second-stage filter element through a vent hole in the air outlet pipe. According to the utility model, through three-stage stage treatment, the separation efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines and relates to a high-efficiency and low-resistance multi-stage oil-gas separation device. Background Art

[0002] When the engine is working, the high-pressure combustible mixture and burned gas in the combustion chamber will leak into the crankcase through the gap between the piston group and the cylinder to a greater or lesser extent. At the same time, the oil temperature rises during the operation of the engine, and a lot of oil vapor appears. The exhaust gas entering the crankcase and the oil vapor in the crankcase will cause high crankcase pressure, which will then damage the crankcase seal, causing oil leakage and affecting engine performance. In order to prevent the crankcase pressure from being too high, the gas in the crankcase needs to be led out to balance the pressure in the crankcase; the gas in the crankcase is mixed with a large amount of oil droplets and oil vapor. If it is directly led out without treatment, it will cause environmental pollution and increase oil consumption, so an oil-gas separation device is needed.

[0003] For the oil-gas separation device, the separation efficiency is generally negatively correlated with the volume and flow resistance of the separation device; however, for the engine, the volume and resistance of the oil-gas separation device are relatively high. Common oil-gas separation devices have problems such as large volume or large resistance of the separation device while ensuring the separation efficiency, which causes great inconvenience to the spatial layout of the diesel engine. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a multi-stage oil-gas separation device with high efficiency and low resistance.

[0005] The utility model adopts the following technical solutions to achieve the above purpose:

[0006] A high-efficiency, low-resistance multi-stage oil-gas separation device, the multi-stage oil-gas separation device having a shell; the shell is a cylindrical structure with openings at both ends; the upper and lower end openings of the shell are respectively provided with an upper cover and a lower cover; the center of the lower cover has a through hole; the center of the through hole is provided with a fastening bolt fixed to the lower cover and perpendicular to the lower cover; the lower end of the lower cover is fixed with an intake pipe connected to the through hole; a rotating guide vane assembly for performing the first step of separation of oil and gas is provided in the shell; the rotating guide vane assembly has rotating blades for performing the first step of separation of oil and gas; the rotating blades have an inclination angle, and the rotating blades are installed on the fastening bolts; a filter element assembly for further separation of oil and gas is provided above the guide vane assembly Part; the filter element assembly is located in the shell; the filter element assembly has an outlet pipe; the lower end of the outlet pipe is located in the shell, and its lower end opening is closed by a detachable end cover; the upper end of the outlet pipe extends out of the shell; a filter screen is welded in the outlet pipe; a secondary filter element is filled in the filter screen; a primary filter element housing is sleeved on the outer side of the part of the outlet pipe located in the shell; a secondary filter element is filled between the primary filter element housing and the outlet pipe; the primary filter element is connected to the secondary filter element through the vent hole on the outlet pipe; the primary filter element housing has a vent hole connected to the inside of the shell; the primary filter element and the secondary filter element together constitute a structure for performing secondary and tertiary treatment of oil and gas separated by rotating blades.

[0007] The upper cover is welded to the air outlet pipe.

[0008] The upper and lower ends of the outer wall of the shell are both provided with fastening handles for forming a detachable connection with the upper cover and the lower cover; the upper cover and the lower cover are both provided with pull rings for cooperating with the fixed handles on the upper end of the outer wall of the shell.

[0009] The lower end surface of the upper cover is provided with a protrusion, and the outer circumferential surface of the protrusion is provided with a sealing groove for installing an O-ring.

[0010] The utility model proposes a high-efficiency and low-resistance multi-stage oil-gas separation device, which adopts different methods for oil droplets of different sizes in the oil-gas mixture through three-stage classification treatment, so as to effectively improve the separation efficiency; the function of the swirl blade is to separate the large oil droplets in the oil-gas mixture by using centrifugal force by changing the flow direction of the oil and gas, and the rotatable swirl blade realizes the oil-gas separation function on the one hand, and on the other hand, the inertial force generated by the rotation process of the blade can push the oil and gas to move upward, so as to reduce the flow resistance of the separation device; the two-stage filter element with different densities is designed, so as to effectively reduce the gas flow resistance of the oil-gas separation device while ensuring the oil-gas separation filtration efficiency; the collected oil droplets filtered by the first-stage and second-stage filter elements can lubricate the bearings of the swirl blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a structural schematic diagram of the filter element assembly in the utility model.

[0013] Figure 3 It is a structural schematic diagram of the shell in the utility model.

[0014] Figure 4 It is a structural schematic diagram of the rotating guide vane assembly in the utility model.

[0015] In the figure: 1. filter element assembly, 1-1. outlet pipe, 1-2. filter screen, 1-3. upper cover, 1-4. pull ring, 1-5. sealing groove, 1-6. primary filter element housing, 1-7. primary filter element, 1-8. secondary filter element, 1-9. air vent, 1-10. oil flow hole, 1-11. removable end cover, 2. housing, 2-1. tightening handle, 3. rotating guide vane assembly, 3-1. self-locking nut, 3-2. spacer bushing, 3-3. rotating blade, 3-4. ball bearing, 3-5. sealing groove, 3-6. lower cover, 3-7. pull ring, 3-8. tightening bolt, 3-9. intake pipe, 3-10. interface flange. DETAILED DESCRIPTION

[0016] The utility model is described with reference to the accompanying drawings and specific embodiments:

[0017] like Figure 1 As shown, a high-efficiency and low-resistance multi-stage oil-gas separation device, the multi-stage oil-gas separation device has a shell 2; Figure 3 The shell 2 is a cylindrical structure with openings at both ends; the upper and lower openings of the shell 2 are respectively provided with an upper cover 1-3 and a lower cover 3-6; Figure 4, the center of the lower cover 3-6 has a through hole; the center of the through hole is installed with a fastening bolt 3-8 fixed to the lower cover and perpendicular to the lower cover; the lower end of the lower cover 1-3 is fixed with an intake pipe 3-9 connected to the through hole; the lower cover 3-5 is designed with a protrusion with an O-ring groove 3-5 and a pull ring 3-7 for fixing the shell; a rotating guide vane assembly 3 for the first step of oil and gas separation is arranged in the shell 2; the rotating guide vane assembly 3 has a rotating blade 3-2 for the first step of oil and gas separation; the rotating blade 3-2 has a certain inclination angle, and the circular tube at the center of the swirl blade 3-3 is installed in cooperation with the outer rolling ring of the ball bearing 3-4; the two ball bearings 3-4 are sleeved on the fastening bolt 3-8, and are separated by a spacing bushing 3-2, connected to the lower cover 3-6 of the separation device, and locked by a self-locking nut 3-1; a filter element assembly 1 for further separation of oil and gas is arranged above the guide vane assembly; the The filter element assembly 1 is located in the shell 2; the filter element assembly 1 has an outlet pipe 1-1; the lower end of the outlet pipe 1-1 is located in the shell 2, and its lower end opening is closed by a detachable end cover 1-11; the upper end of the outlet pipe 1-1 extends out of the shell 2; a filter screen 1-2 is welded in the outlet pipe 1-1; a secondary filter element 1-8 is filled in the filter screen; a primary filter element housing 1-6 is sleeved on the outer side of the part of the outlet pipe 1-1 located in the shell; a primary filter element 1-7 is filled between the primary filter element housing 1-6 and the outlet pipe; the primary filter element 1-7 is connected with the secondary filter element 1-8 through the vent hole 1-9 on the outlet pipe; the primary filter element housing has a vent hole connected to the inside of the shell; the primary filter element and the secondary filter element together constitute a structure for performing secondary and tertiary treatment of the oil and gas separated by the rotating blades; an oil flow hole 1-10 is opened at the lower part of the end cover for the reflux of separated oil droplets.

[0018] The upper cover is welded to the air outlet pipe.

[0019] The upper and lower ends of the outer wall of the shell are both provided with fastening handles for forming a detachable connection with the upper cover and the lower cover; the upper cover and the lower cover are both provided with pull rings for cooperating with the fixed handles on the upper end of the outer wall of the shell.

[0020] The lower end surface of the upper cover is provided with a protrusion, and the outer circumferential surface of the protrusion is provided with a sealing groove for installing an O-ring.

[0021] The multi-stage oil-gas separator has three independent parts. The outer shell and the upper and lower covers are fixed by pulling noses, and can be easily disassembled for cleaning. The outer shell and the upper and lower covers are sealed by O-rings at the protrusions on the upper and lower covers. When the multi-stage high-efficiency oil-gas separator is in use, its lower part serves as the inlet of the separator, and the oil-gas mixture to be treated enters the interior of the separator from there. After the oil and gas to be treated enter the interior of the separator, the rotating blades arranged at the lower part of the separator perform the first step of separation on the oil and gas. After the oil and gas enter the respirator, they move upward. The swirl blades have a certain inclination angle. After the upward-moving oil and gas come into contact with the swirl blades, the flow direction of the oil and gas is changed to spiral upward. During the upward rotation of the oil and gas, preliminary separation is performed under the action of centrifugal force. The oil droplets with higher density hit the outer shell of the separator under the action of centrifugal force and adhere to its surface. After the oil film formed on the inner surface of the outer shell of the separator reaches a certain thickness, it will condense into droplets and flow down. After the swirl blades guide the oil and gas mixture with lower density to continue to move upwards, and enter the first filter element through the small holes of the outer shell of the first filter element. The first filter element is composed of stainless steel wire mesh. After the initial separation, the small molecular oil droplets in the low-density oil and gas mixture will stick to the wire mesh when passing through the first filter element, forming oil molecule droplets. The oil molecule droplets will gradually increase. When it accumulates to a point where its own gravity is greater than the surface tension of the wire mesh on the droplets, the oil droplets will fall along the wire mesh. The oil droplets falling in the first filter element will flow out through the oil flow holes at the bottom of the first filter element shell; the oil and gas filtered by the first filter element will enter the second filter element through the small holes opened on the outside of the outlet pipe. The structure of the second filter element is similar to that of the first filter element, but the density of its wire mesh is denser than that of the first filter element, which can filter out finer oil droplets. The oil droplets gathered in the second filter element will flow out through the oil flow hole in the center of the bottom end cover of the ventilation pipe. The lubrication flowing out of the oil flow holes at the bottom of the first and second filter elements falls downward, which can lubricate the ball bearings in the center of the swirl blades. Finally, the oil and gas after tertiary treatment are discharged through the ventilation pipe.

[0022] The upper and lower interfaces of the shell are designed with a 30° chamfer to facilitate the installation of the upper and lower covers of the separation device.

Claims

1. A high-efficiency, low-resistance multi-stage oil-gas separation device, characterized in that: The multi-stage oil-gas separation device comprises a shell; the shell is a cylindrical structure with openings at both ends; the upper and lower end openings of the shell are respectively provided with an upper cover and a lower cover; the center of the lower cover has a through hole; the center of the through hole is provided with a fastening bolt fixed to the lower cover and perpendicular to the lower cover; the lower end of the lower cover is fixed with an air inlet pipe connected with the through hole; a rotating guide vane assembly for performing the first step of separation of oil and gas is provided in the shell; the rotating guide vane assembly has rotating vanes for performing the first step of separation of oil and gas; the rotating vanes have an inclination angle, and the rotating vanes are installed on the fastening bolts; a filter element assembly for further separation of oil and gas is provided above the guide vane assembly; the filter element assembly The component is located in the shell; the filter element assembly has an outlet pipe; the lower end of the outlet pipe is located in the shell, and its lower end opening is closed by a detachable end cover; the upper end of the outlet pipe extends out of the shell; a filter screen is welded in the outlet pipe; a secondary filter element is filled in the filter screen; a primary filter element housing is sleeved on the outer side of the part of the outlet pipe located in the shell; a secondary filter element is filled between the primary filter element housing and the outlet pipe; the primary filter element is connected to the secondary filter element through the vent hole on the outlet pipe; the primary filter element housing has a vent hole connected to the inside of the shell; the primary filter element and the secondary filter element together constitute a structure for performing secondary and tertiary treatment of oil and gas separated by rotating blades.

2. A high-efficiency, low-resistance multi-stage oil-gas separation device as claimed in claim 1, characterized in that: The upper cover is welded to the air outlet pipe.

3. A high-efficiency, low-resistance multi-stage oil-gas separation device as claimed in claim 1, characterized in that: The upper and lower ends of the outer wall of the shell are both provided with fastening handles for forming a detachable connection with the upper cover and the lower cover; the upper cover and the lower cover are both provided with pull rings for cooperating with the fixed handles on the upper end of the outer wall of the shell.

4. The high-efficiency, low-resistance multi-stage oil-gas separation device according to claim 1, characterized in that: The lower end surface of the upper cover is provided with a protrusion, and the outer circumferential surface of the protrusion is provided with a sealing groove for installing an O-ring.

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