A forward and reverse self-cleaning centrifugal separator

Abstract

The present invention discloses a forward and reverse self-cleaning centrifugal separator, comprising a first shell, a second shell, a separation device, a first nozzle, and a second nozzle. The first shell is provided with a chamber, and the second shell is located above the first shell. The separation device comprises a main shaft, a separation assembly, and a drive wheel. The main shaft located in the chamber is provided with a drive wheel, and the main shaft located in the second shell is provided with a separation assembly. The first nozzle is used to drive the drive wheel to rotate clockwise, and the second nozzle is used to drive the drive wheel to rotate counterclockwise, so that the main shaft drives the separation assembly to achieve self-cleaning after forward and reverse rotation. The forward and reverse self-cleaning centrifugal separator can achieve self-cleaning after forward and reverse rotation by arranging the first nozzle and the second nozzle in the first shell, thereby avoiding sludge clogging that affects the efficiency and effect of oil and gas separation, and improving the reliability of use.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal separation, in particular to a forward and reverse self-cleaning centrifugal separator. Background Art

[0002] The oil-gas separator is a device that separates the oil-gas mixture in the crankcase, returning the separated oil to the oil pan through a pipeline and exhausting the separated gases to the outside. The oil-gas separator is a key component of the crankcase ventilation system, and its performance directly determines the reliability and emission performance of the engine.

[0003] Existing oil-gas separators primarily separate the oil-gas mixture using the centrifugal force generated by the rotation of a separation device within the housing. However, over time, oil sludge forms within the separation device, increasing its weight and impairing its dynamic balance. Furthermore, the sludge can clog portions of the separation device's oil and gas flow channels, reducing the efficiency and effectiveness of oil-gas separation. Summary of the Invention

[0004] The purpose of the present invention is to provide a forward and reverse self-cleaning centrifugal separator, which realizes self-cleaning after the separation component is driven forward and reverse by different nozzles, thereby ensuring the efficiency and effect of oil and gas separation.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] The present application provides a forward and reverse self-cleaning centrifugal separator, comprising:

[0007] A first shell and a second shell, wherein the first shell is provided with a cavity, and the second shell is located above the first shell;

[0008] The separation device includes a main shaft, a separation assembly, and a drive wheel, wherein a portion of the main shaft is rotatably disposed within the cavity, and another portion of the main shaft is rotatably disposed within the second housing. The drive wheel is disposed on the main shaft located within the cavity, and the separation assembly is disposed on the main shaft located within the second housing.

[0009] The first nozzle and the second nozzle are arranged in the cavity, the first nozzle is used to drive the driving wheel to rotate clockwise, and the second nozzle is used to drive the driving wheel to rotate counterclockwise, so that the main shaft drives the separation component to achieve self-cleaning after forward and reverse rotation.

[0010] In an optional solution, the first nozzle and the second nozzle are arranged on the periphery of the driving wheel.

[0011] In an optional solution, the separation device includes multiple drive wheels, which are arranged up and down along the main shaft, and the outer periphery of each clockwise rotating drive wheel is provided with a first nozzle, and the outer periphery of each counterclockwise rotating drive wheel is provided with a second nozzle.

[0012] In an optional solution, there are multiple first nozzles, which are evenly distributed around the circumference of the driving wheel that rotates clockwise, and there are multiple second nozzles, which are evenly distributed around the circumference of the driving wheel that rotates counterclockwise.

[0013] In an optional solution, at least two branch channels are provided inside the shell wall of the first shell, one end of each branch channel converges outside the first shell to form a main channel, and the other end of each branch channel is connected to the corresponding first nozzle or the second nozzle, so that the flow rate entering each branch channel from the main channel remains consistent.

[0014] In an optional solution, an oil and gas inlet and an oil return port are provided at the bottom of the second shell, and an air outlet is provided at the top of the second shell. The oil and gas mixture entering the second shell from the oil and gas inlet is separated into gas and oil under the centrifugal action of the separation component, and the separated gas is discharged through the air outlet, and the separated oil flows back into the cavity through the oil return port.

[0015] In an optional solution, the forward and reverse rotating self-cleaning centrifugal separator further includes a controller and an anti-blocking detection component;

[0016] The anti-blocking detection component includes: a magnet and a Hall sensor, the controller is electrically connected to the Hall sensor to obtain the rotation speed of the main shaft, the magnet is arranged on the main shaft, and the Hall sensor is arranged in the first shell or the second shell, or the Hall sensor is arranged on the rotating shaft and the magnet is arranged in the first shell or the second shell; or,

[0017] The anti-blocking detection component includes: a first air pressure sensor and a second air pressure sensor. The controller electrically connects the first air pressure sensor and the second air pressure sensor to obtain the pressure difference between the air outlet and the oil and gas inlet. The first air pressure sensor is arranged at the oil and gas inlet, and the second air pressure sensor is arranged at the air outlet.

[0018] In an optional scheme, the forward and reverse self-cleaning centrifugal separator also includes a first valve and a second valve, and the controller is electrically connected to the first valve and the second valve respectively. The first valve is used to control the opening and closing of the branch channel that supplies fluid to the first nozzle, and the second valve is used to control the opening and closing of the branch channel that supplies fluid to the second nozzle.

[0019] In an optional solution, the forward and reverse rotating self-cleaning centrifugal separator further includes a controller, and the controller is used to control the first nozzle and the second nozzle to spray fluid alternately.

[0020] In an optional solution, the forward and reverse self-cleaning centrifugal separator further includes a timer electrically connected to the controller, and the clockwise rotation time of the separation component is a fixed value M, and the counterclockwise rotation time is a fixed value N;

[0021] When the timer detects that the separation assembly rotates clockwise for a time period of M, the controller controls the second nozzle to spray fluid to make the driving wheel rotate counterclockwise;

[0022] When the timer detects that the counterclockwise rotation time of the separation component reaches N, the controller controls the first nozzle to spray fluid to make the driving wheel rotate clockwise.

[0023] In an optional solution, the separation assembly includes a plurality of stacked separation discs, each of which has a hollow frustum structure, and a gap between adjacent separation discs is 0.8-0.9 mm.

[0024] In an optional solution, a throttling rib is provided on the separation disc. The throttling rib is annularly provided on the outer side wall of the separation disc, and the throttling rib is a discontinuous structure.

[0025] In an optional solution, the separation disk includes a plurality of throttling ribs, and the plurality of throttling ribs are distributed on the outer side wall of the separation disk at equal or unequal intervals along the generatrix of the separation disk.

[0026] In an optional solution, the separation disc further includes a plurality of drainage ribs, each of which is arranged on the inner wall of the separation disc at equal or unequal intervals, and the drainage ribs extend from the upper end opening to the lower end opening of the separation disc and gradually increase in thickness from top to bottom.

[0027] In an optional solution, in the direction from the upper end to the lower end of the main shaft, the throttling effect of the throttling ribs of the separation disk on the oil-gas mixture gradually decreases.

[0028] Compared with the prior art, the beneficial effects of the present invention include at least: by arranging the first nozzle and the second nozzle in the first shell, the separation component can be driven forward and reversed to achieve self-cleaning, avoiding sludge blockage that affects the oil-gas separation efficiency and effect, and improving the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of a single driving wheel drive of a forward and reverse rotating self-cleaning centrifugal separator according to an embodiment of the present invention.

[0030] Figure 2 The diagram is a schematic structural diagram of a multi-drive wheel drive of a forward and reverse rotating self-cleaning centrifugal separator according to an embodiment of the present invention.

[0031] Figure 3 It is a structural schematic diagram of a forward and reverse rotating self-cleaning centrifugal separator according to an embodiment of the present invention.

[0032] Figure 4 It is a structural schematic diagram of a forward and reverse rotating self-cleaning centrifugal separator according to an embodiment of the present invention.

[0033] Figure 5 yes Figure 4 Sectional view along line AA.

[0034] Figure 6 yes Figure 4 Cross-sectional view along line BB.

[0035] Figure 7 Schematic diagram of the structure of the separation component of an embodiment of the present invention.

[0036] In the figure: 1. First shell; 11. Cavity; 2. Second shell; 21. Oil and gas inlet; 22. Gas outlet; 3. Separation device; 31. Main shaft; 32. Separation assembly; 321. Separation disc; 322. Throttle rib; 323. Drainage rib; 33. Drive wheel; 4. First nozzle; 5. Second nozzle; 6. Bearing; 7. Anti-blocking detection assembly; 71. Magnet; 72. Hall sensor; 73. First air pressure sensor; 74. Second air pressure sensor; 8. Cyclone; 81. Archimedean spiral flow channel; 9. Impeller. DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the drawings represent identical or similar structures, and thus repeated descriptions thereof will be omitted.

[0038] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but can be modified as needed, and all such modifications are within the scope of protection of the present invention.

[0039] See also Figure 1-3 、 Figure 5 As shown, the present invention provides a forward and reverse self-cleaning centrifugal separator, comprising a first shell 1, a second shell 2, a separation device 3, a first nozzle 4 and a second nozzle 5.

[0040] The first shell 1 is provided with a cavity 11 . The second shell 2 is located above the first shell 1 . The bottom of the second shell 2 is provided with an oil and gas inlet 21 and an oil return port. The top of the second shell 2 is provided with an air outlet 22 .

[0041] The separation device 3 includes a main shaft 31, a separation component 32 and a drive wheel 33. A part of the main shaft 31 is rotatably arranged in the cavity 11, and the other part of the main shaft 31 is rotatably arranged in the second shell 2. The drive wheel 33 is provided on the main shaft 31 located in the cavity 11, and the separation component 32 is provided on the main shaft 31 located in the second shell 2. The oil and gas mixture entering the second shell 2 from the oil and gas inlet 21 is separated into gas and oil under the centrifugal action of the separation component 32. The separated gas is discharged through the gas outlet 22, and the separated oil flows back to the cavity 11 through the oil return port.

[0042] The first nozzle 4 and the second nozzle 5 are arranged in the cavity 11. The first nozzle 4 is used to drive the driving wheel 33 to rotate clockwise, and the second nozzle 5 is used to drive the driving wheel 33 to rotate counterclockwise, so that the main shaft 31 drives the separation component 32 to achieve self-cleaning after forward and reverse rotation.

[0043] When the above-mentioned forward and reverse self-cleaning centrifugal separator is in operation, the first nozzle 4 drives the main shaft 31 to rotate clockwise through the drive wheel 33, so that the separation component 32 rotates forward to separate the oil-gas mixture. During the long separation process, part of the oil in the oil-gas mixture will adhere to the separation device 3 to form sludge. The sludge will affect the air flow channel and the dynamic balance of the separation device 3, resulting in a decrease in separation efficiency and effect. After the second nozzle 5 is added, the second nozzle 5 drives the main shaft 31 to rotate counterclockwise through the drive wheel 33, and the separation component 32 will also reverse with the sludge. During this process, the sludge will be subjected to a reverse force, causing it to detach from the separation component 32 to achieve self-cleaning. Therefore, the forward and reverse self-cleaning centrifugal separator only needs to control the reversal periodically to achieve simple and reliable self-cleaning to reduce sludge adhesion and ensure the efficiency and effect of oil-gas separation.

[0044] It should be noted that the above description is based on the example of the main shaft 31 rotating clockwise for separation and rotating counterclockwise for self-cleaning. In other embodiments, the main shaft 31 can also rotate clockwise for self-cleaning and rotate counterclockwise for separation. This method is also covered by the protection scope of the present invention.

[0045] Since the first nozzle 4 is used to drive the main shaft 31 to rotate, the speed of the main shaft 31 can generally only reach 6500-7500r / min. Compared with the existing speed of more than 10000r / min, by reducing the speed, the damage to the bearing 6 can be significantly reduced, and the reliability of the forward and reverse self-cleaning centrifugal separator can be improved.

[0046] See also Figure 1As shown, in a specific embodiment, the first nozzle 4 and the second nozzle 5 are arranged on the periphery of the driving wheel 33.

[0047] The above structure is for a single drive wheel 33 operation. The fluid ejected from the first nozzle 4 and the fluid ejected from the second nozzle 5 both act on one drive wheel 33. In this embodiment, the first nozzle 4 and the second nozzle 5 are symmetrically arranged with respect to the drive wheel 33. This design enables the force to be evenly applied to both sides of the drive wheel 33, thereby solving the problem of aggravated wear between the main shaft 31 and the bearing 6 caused by local force on one side of the drive wheel 33.

[0048] See also Figure 2 As shown, in another specific embodiment, the separation device 3 includes a plurality of drive wheels 33, which are arranged up and down along the main shaft 31, and the outer periphery of each clockwise rotating drive wheel 33 is provided with a first nozzle 4, and the outer periphery of each counterclockwise rotating drive wheel 33 is provided with a second nozzle 5.

[0049] The above structure is a working condition of multiple drive wheels 33. The fluid ejected by the first nozzle 4 only drives the drive wheel 33 rotating clockwise, and the fluid ejected by the second nozzle 5 only drives the drive wheel 33 rotating counterclockwise. In this embodiment, there are two drive wheels 33 and they are installed on the main shaft 31 in opposite rotation directions. The first nozzle 4 and the second nozzle 5 are arranged side by side along the length direction of the main shaft 31. Although the dynamic balancing ability of the main shaft 31 of this design is slightly reduced, the overall structure is compact and can also drive the main shaft 31 to drive the separation component 32 to rotate forward and reverse for self-cleaning.

[0050] In addition, the driving wheel 33 generally adopts a turbine structure, and a vortex groove is provided on the outer peripheral wall of the driving wheel 33 in the same direction as the fluid ejected from the first nozzle 4. The vortex groove is used to receive the fluid ejected from the first nozzle 4, thereby driving the driving wheel 33 to rotate. The direction of the fluid ejected from the first nozzle 4 is roughly the same as the tangential direction of the outer peripheral wall of the driving wheel 33. The vortex grooves of the existing driving wheel 33 have the same inclined opening direction. If used Figure 1 The single driving wheel 33 shown realizes forward and reverse self-cleaning. The force of the driving wheel 33 driven by the fluid ejected from the second nozzle 5 to rotate counterclockwise is relatively small, which is not conducive to achieving thorough self-cleaning. In this embodiment, by adopting multiple driving wheels 33, the vortex groove of each driving wheel 33 can be set to a shape that can fully receive the fluid ejected from the nozzle, so that the driving wheel 33 can receive sufficient driving force from the nozzle when rotating clockwise and counterclockwise.

[0051] In a preferred embodiment, there are multiple first nozzles 4 , which are evenly distributed around the circumference of the driving wheel 33 that rotates clockwise, and there are multiple second nozzles 5 , which are evenly distributed around the circumference of the driving wheel 33 that rotates counterclockwise.

[0052] Regardless of whether it is a single drive wheel 33 operating condition or a multi-drive wheel 33 operating condition, by evenly distributing multiple first nozzles 4 or second nozzles 5 on the circumference of the corresponding drive wheel 33, the drive wheel 33 can be subjected to uniform force, thereby ensuring that the main shaft 31 rotates in a more balanced state, further reducing the wear between the main shaft 31 and the bearing 6, and ensuring the stability and reliability of the operation of the separation component 32.

[0053] In a specific embodiment, at least two branch channels are provided inside the shell wall of the first shell 1, one end of each branch channel converges outside the first shell 1 to form a main channel, and the other end of each branch channel is connected to the corresponding first nozzle 4 or second nozzle 5, so that the flow rate of the fluid entering each branch channel from the main channel remains consistent.

[0054] The built-in branch channel can avoid the need for an external shell setting, making the first shell 1 more simple and beautiful as a whole, the branch channel is not easily damaged, and the shared main channel is convenient for docking with the crankcase (not shown). In addition, by controlling the flow rate of each branch channel, the consistency of the force at various locations on the drive wheel 33 can be effectively guaranteed, so that the main shaft 31 can rotate in a balanced manner.

[0055] See also Figure 5 As shown, in a specific embodiment, the forward and reverse rotating self-cleaning centrifugal separator further includes a controller and an anti-blocking detection component 7.

[0056] The anti-blocking detection component 7 includes: a magnet 71 and a Hall sensor 72. The controller is electrically connected to the Hall sensor 72 to obtain the rotational speed of the main shaft 31. The magnet 71 is set on the main shaft 31 and the Hall sensor 72 is set in the first shell 1 or the second shell 2, or the Hall sensor 72 is set on the rotating shaft and the magnet 71 is set in the first shell 1 or the second shell 2.

[0057] Alternatively, the anti-blocking detection component 7 includes: a first air pressure sensor 73 and a second air pressure sensor 74, and the controller electrically connects the first air pressure sensor 73 and the second air pressure sensor 74 to obtain the pressure difference between the air outlet 22 and the oil and gas inlet 21, the first air pressure sensor 73 is arranged at the oil and gas inlet 21, and the second air pressure sensor 74 is arranged at the air outlet 22.

[0058] The above method determines whether the separation component 32 needs self-cleaning by setting an anti-blocking detection component 7, and there are mainly two anti-blocking detection methods: rotation speed or air pressure.

[0059] Specifically, the rotation speed detection method uses the Hall sensor 72 in conjunction with the magnet 71 to detect the rotation speed of the separation component 32. As the oil sludge on the separation component 32 increases, the oil-gas mixture cannot be discharged smoothly from the air flow path of the separation component 32. In addition, the weight of the oil sludge hinders the rotation of the separation component 32, causing the rotation speed to decrease. When the speed drops to a preset value, the controller determines that the separation component 32 is blocked and needs self-cleaning. Another air pressure detection method uses the first air pressure sensor 73 and the second sensor to detect the pressure of the air outlet 22 and the oil and gas inlet 21 respectively. As the oil sludge on the separation component 32 increases, the oil-gas mixture cannot be discharged smoothly from the air flow path of the separation component 32, which will inevitably lead to a decrease in the pressure of the air outlet 22, thereby reducing the pressure difference between the air outlet 22 and the oil and gas inlet 21. When the pressure difference decreases to a preset value, the controller determines that the separation component 32 is blocked and needs self-cleaning. Although both rotation speed detection and air pressure detection can be used for anti-blocking detection of the separation component 32, the rotation speed detection has its own rotation speed detection function in addition to being used for anti-blocking detection, and is superior to the air pressure anti-blocking detection in performance.

[0060] In addition, the forward and reverse self-cleaning centrifugal separator also includes a first valve and a second valve (not shown in the figure). The controller is electrically connected to the first valve and the second valve, respectively. The first valve and the second valve can be solenoid valves, respectively. The first valve is used to control the on-off of the branch channel that supplies fluid to the first nozzle 4, and the second valve is used to control the on-off of the branch channel that supplies fluid to the second nozzle 5.

[0061] In another specific embodiment, the forward and reverse self-cleaning centrifugal separator further includes a controller, which is used to control the first nozzle 4 and the second nozzle 5 to spray fluid alternately.

[0062] The above method performs self-cleaning in a timed manner, and there is no need to determine whether the separation component 32 is blocked. When in use, the controller (not shown) directly controls the first nozzle 4 and the second nozzle 5 to alternately spray fluid according to the forward and reverse time parameters preset by the program and the operation duration, and can also control the forward and reverse rotation of the separation component 32 to achieve self-cleaning.

[0063] In a preferred embodiment, the forward and reverse rotating self-cleaning centrifugal separator further includes a timer electrically connected to the controller, and the clockwise rotation duration of the separation component 32 is a fixed value M, and the counterclockwise rotation duration is a fixed value N.

[0064] When the timer detects that the separation component 32 has rotated clockwise for a period of time reaching M, the controller controls the second nozzle 5 to spray fluid to make the drive wheel 33 rotate counterclockwise; when the timer detects that the separation component 32 has rotated counterclockwise for a period of time reaching N, the controller controls the first nozzle 4 to spray fluid to make the drive wheel 33 rotate clockwise.

[0065] Controlling the separation assembly 32's forward and reverse rotation in a timed manner can also effectively achieve self-cleaning. Specifically, a timer (not shown) detects the clockwise rotation duration M and counterclockwise rotation duration N. A controller controls the separation assembly 32 to switch forward and reverse according to these durations to achieve self-cleaning. In this embodiment, the clockwise rotation duration of the separation assembly 32 can be 100 minutes, and the counterclockwise rotation duration can be 5 minutes. These duration parameters meet the self-cleaning requirements without significantly affecting the oil-gas separation efficiency.

[0066] See also Figure 5 、 Figure 7 As shown, in a specific embodiment, the separation assembly 32 includes a plurality of stacked separation discs 321 . The separation discs 321 are hollow truncated cone structures, and the gap between adjacent separation discs 321 is 0.8-0.9 mm.

[0067] In the prior art, the gap between adjacent separation discs 321 is mostly 0.4-0.6 mm, and the number of separation discs 321 is mostly 4-5. Since the narrow gap and the large number of separation discs 321 are not conducive to self-cleaning, the present embodiment increases the gap between adjacent separation discs 321 to 0.8-0.9 mm, and controls the number of separation discs 321 to 15-30, which can significantly improve the self-cleaning effect. By reducing the number of separation discs 321, the volume and cost of the centrifugal oil-gas separator can be reduced, so that the centrifugal oil-gas separator can be installed on a wider variety of engines. It can also reduce the weight of the stack of separation discs 321 and reduce damage to the bearing 6.

[0068] In a preferred embodiment, as Figure 7 As shown, the separation disc 321 is provided with a throttling rib 322 . The throttling rib 322 is annularly provided on the outer wall of the separation disc 321 , and the throttling rib 322 is a discontinuous structure.

[0069] While increasing the gap and reducing the number of separation discs 321 described above facilitates oil sludge removal, it also reduces the separation efficiency of the oil-gas mixture. This embodiment incorporates throttle ribs 322 with a sloped surface, acting like a springboard between the separation discs 321. These throttle ribs 322 guide the oil-gas mixture into collision with the separation discs 321, separating the oil and liquid. They also promote the retention of the oil-gas mixture, thereby enhancing the oil-gas separation efficiency. Furthermore, the discontinuous structure of the throttle ribs 322 facilitates the discharge of self-cleaned oil sludge through the gaps in the throttle ribs 322.

[0070] Alternatively, the separation disc 321 includes a plurality of throttling ribs 322 , which are distributed on the outer wall of the separation disc 321 at equal or unequal intervals along the generatrix of the separation disc 321 to further enhance the oil-gas separation effect.

[0071] Furthermore, in the direction from the upper end to the lower end of the main shaft 31 , the throttling effect of the throttling ribs 322 of the separation disk 321 on the oil-gas mixture gradually decreases.

[0072] See also Figure 5 As shown, from the vertical cross-sectional view of the separation component 32, the separation component 32 has a larger axial air flow channel and several layers of thinner radial air flow channels. During the rotational separation process, the oil-gas mixture tends to be concentrated in the upper area of ​​the separation component 32 through the axial air flow channel, which results in the lower area of ​​the separation component 32 being unable to be effectively utilized and the separation efficiency is reduced.

[0073] More specifically, under the action of flow inertia, the oil-gas mixture tends to flow outward through the gaps between the multiple separation discs 321 near the top, resulting in a large flow of the oil-gas mixture between the separation discs 321 near the top and a small flow of the oil-gas mixture between the separation discs 321 near the bottom, resulting in a prominent flow imbalance phenomenon. Especially when the gaps between the separation discs 321 are large, the flow imbalance phenomenon is more obvious. The direct result of the flow imbalance is that the small droplets (about 1 μm) of oil in the oil-gas mixture between the separation discs 321 near the top have a shortened residence time on the separation discs 321, resulting in the small droplets being unable to agglomerate into large droplets, making it easier for the small droplets to be discharged from the centrifugal oil-gas separator with the gas, ultimately resulting in a decrease in separation efficiency.

[0074] This embodiment designs the throttling ribs 322 so that their throttling effect on the oil-air mixture gradually decreases from top to bottom, thereby enhancing the air outlet capacity of the lower region of the separation assembly 32. Ultimately, this balances the air outlet volume of the radial flow passages in each layer, thereby improving the utilization efficiency of the separation assembly 32. This also prevents the upper region of the separation assembly 32 from operating in a long-term overloaded state, which could cause the oil to form sludge on the separation discs 321 in the upper region and clog the radial flow passages. To gradually reduce the throttling effect of the separation assembly 32 from top to bottom, the throttling ribs 322 can be designed as follows:

[0075] In the direction from top to bottom of the main shaft 31, the height of the throttling ribs 322 of the separation disk 321 gradually decreases; or, in the direction from top to bottom of the main shaft 31, the number of through holes on the throttling ribs 322 of the separation disk 321 gradually increases; or, in the direction from top to bottom of the main shaft 31, the aperture of the through holes on the throttling ribs 322 of the separation disk 321 gradually increases; or, the throttling ribs 322 have a discontinuous structure, and in the direction from top to bottom of the main shaft 31, the spacing between each rib segment of the throttling ribs 322 of the separation disk 321 gradually increases; or, in the direction from top to bottom of the main shaft 31, the number of throttling ribs 322 of the separation disk 321 gradually decreases.

[0076] The above-mentioned throttling rib solutions can gradually reduce the throttling effect of the separation component 32 from top to bottom, thereby ensuring that the air output of each radial flow channel tends to be balanced and improving the utilization efficiency of the separation component 32.

[0077] See also Figure 7 As shown, the separation disc 321 further includes a plurality of drainage ribs 323, each of which is arranged at equal or unequal intervals on the inner wall of the separation disc 321. The drainage ribs 323 extend from the upper opening to the lower opening of the separation disc 321 and the thickness gradually increases from top to bottom.

[0078] This structural setting gradually reduces the air flow pressure between the separation discs 321, increases the pressure gradient force of the oil, and gradually reduces the pressure from the inlet of the annular space of the separation disc 321 to the outlet of the annular space, thereby reducing the circulation speed of the oil-gas mixture, so that the oil-gas mixture stays longer in the annular space between the separation discs 321, and small-particle oil is more easily agglomerated into large-particle oil, thereby improving the separation effect.

[0079] See also Figure 5-6 As shown, in a specific embodiment, a cyclone 8 is provided between the oil and gas inlet 21 and the separation component 32 , and an Archimedean spiral flow channel 81 is provided outside the cyclone 8 to increase the pressure and enhance the swirling effect of the oil and gas mixture entering the separation component 32 .

[0080] By setting up the cyclone 8, the oil-gas mixture entering the cyclone 8 will collide with it, separating some oil. Among them, the Archimedean spiral flow channel 81 outside the cyclone 8 is used to guide the oil-gas mixture to enhance the swirl effect. The oil-gas mixture will enter the separation component 32 in a more powerful swirling manner. After pressurization and enhanced swirl effect, a better centrifugal separation effect can be obtained.

[0081] See also Figure 5 、 Figure 7 As shown, in a specific embodiment, an impeller 9 is further provided on the main shaft 31 located in the second housing 2. The impeller 9 is located below the separation component 32 to increase the pressure and enhance the swirling effect of the oil-gas mixture entering the separation component 32.

[0082] By setting the impeller 9, when the main shaft 31 drives the impeller 9 to rotate, the impeller 9 will collide with the oil-gas mixture to separate part of the oil, and at the same time pressurize and turbulent the oil-gas mixture, so that it enters the separation component 32 in a swirling manner to obtain a better centrifugal separation effect. It should be noted that the above-mentioned impeller 9 can also be installed alone below the separation component 32, and can also be used in conjunction with the cyclone 8 to achieve the effects of secondary pressurization and secondary enhanced swirl. In addition, the pressurization effect of the impeller 9 can also increase the pressure rise between the air outlet 22 and the oil and gas inlet 21. The higher the pressure rise, the greater the negative pressure in the crankcase connected to the forward and reverse self-cleaning centrifugal separator can be, and the oil and gas are not easy to overflow, and the reliability is high.

[0083] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes shall fall within the scope of protection of the claims of the present invention.

Claims

1. A forward and reverse rotating self-cleaning centrifugal separator, characterized in that: include: A first shell and a second shell, wherein the first shell is provided with a cavity, and the second shell is located above the first shell; The separation device includes a main shaft, a separation assembly, and a drive wheel, wherein a portion of the main shaft is rotatably disposed within the cavity, and another portion of the main shaft is rotatably disposed within the second housing. The drive wheel is disposed on the main shaft located within the cavity, and the separation assembly is disposed on the main shaft located within the second housing. A first nozzle and a second nozzle are arranged in the cavity, the first nozzle is used to drive the driving wheel to rotate clockwise, and the second nozzle is used to drive the driving wheel to rotate counterclockwise, so that the main shaft drives the separation component to achieve self-cleaning after forward and reverse rotation; The separation device includes a plurality of driving wheels, which are arranged up and down along the main shaft. The outer periphery of each driving wheel rotating clockwise is provided with a first nozzle, and the outer periphery of each driving wheel rotating counterclockwise is provided with a second nozzle.

2. The forward and reverse rotating self-cleaning centrifugal separator according to claim 1, characterized in that: The first nozzle and the second nozzle are disposed on the outer circumference of the driving wheel.

3. The forward and reverse rotating self-cleaning centrifugal separator according to claim 2 or 1, characterized in that: There are multiple first nozzles, which are evenly distributed around the circumference of the driving wheel that rotates clockwise. There are multiple second nozzles, which are evenly distributed around the circumference of the driving wheel that rotates counterclockwise.

4. The forward and reverse rotating self-cleaning centrifugal separator according to claim 1, characterized in that: At least two branch channels are provided inside the shell wall of the first shell, one end of each branch channel converges outside the first shell to form a main channel, and the other end of each branch channel is connected to the corresponding first nozzle or the second nozzle, so that the flow rate entering each branch channel from the main channel remains consistent.

5. The forward and reverse rotating self-cleaning centrifugal separator according to claim 1, characterized in that: An oil and gas inlet and an oil return port are provided at the bottom of the second shell, and an air outlet is provided at the top of the second shell. The oil and gas mixture entering the second shell from the oil and gas inlet is separated into gas and oil under the centrifugal action of the separation component, and the separated gas is discharged through the air outlet, and the separated oil flows back into the cavity through the oil return port.

6. The forward and reverse rotating self-cleaning centrifugal separator according to claim 5, characterized in that: The forward and reverse self-cleaning centrifugal separator also includes a controller and an anti-blocking detection component; The anti-blocking detection component includes: a magnet and a Hall sensor, the controller is electrically connected to the Hall sensor to obtain the rotational speed of the main shaft, the magnet is arranged on the main shaft, and the Hall sensor is arranged in the first shell or the second shell, or the Hall sensor is arranged on the main shaft and the magnet is arranged in the first shell or the second shell; or, The anti-blocking detection component includes: a first air pressure sensor and a second air pressure sensor. The controller electrically connects the first air pressure sensor and the second air pressure sensor to obtain the pressure difference between the air outlet and the oil and gas inlet. The first air pressure sensor is arranged at the oil and gas inlet, and the second air pressure sensor is arranged at the air outlet.

7. The forward and reverse rotating self-cleaning centrifugal separator according to claim 6, characterized in that: The forward and reverse self-cleaning centrifugal separator also includes a first valve and a second valve. The controller is electrically connected to the first valve and the second valve respectively. The first valve is used to control the opening and closing of the branch channel that supplies fluid to the first nozzle, and the second valve is used to control the opening and closing of the branch channel that supplies fluid to the second nozzle.

8. The forward and reverse rotating self-cleaning centrifugal separator according to claim 1, characterized in that: The forward and reverse rotating self-cleaning centrifugal separator further includes a controller configured to control the first nozzle and the second nozzle to spray fluid alternately.

9. The forward and reverse rotating self-cleaning centrifugal separator according to claim 8, characterized in that: The forward and reverse self-cleaning centrifugal separator further includes a timer electrically connected to the controller, wherein the clockwise rotation duration of the separation component is a constant value M, and the counterclockwise rotation duration is a constant value N; When the timer detects that the separation assembly rotates clockwise for a time period of M, the controller controls the second nozzle to spray fluid to make the driving wheel rotate counterclockwise; When the timer detects that the counterclockwise rotation time of the separation component reaches N, the controller controls the first nozzle to spray fluid to make the driving wheel rotate clockwise.

10. The forward and reverse rotating self-cleaning centrifugal separator according to claim 1, characterized in that: The separation assembly includes a plurality of stacked separation discs, each of which is a hollow truncated cone structure, and a gap between adjacent separation discs is 0.8-0.9 mm.

11. The forward and reverse rotating self-cleaning centrifugal separator according to claim 10, characterized in that: The separation disk is provided with a throttling rib, which is annularly arranged on the outer side wall of the separation disk and has a discontinuous structure.

12. The forward and reverse rotating self-cleaning centrifugal separator according to claim 11, characterized in that: The separation disk comprises a plurality of throttling ribs, and the plurality of throttling ribs are distributed and arranged on the outer side wall of the separation disk at equal or unequal intervals along the generatrix of the separation disk.

13. The forward and reverse rotating self-cleaning centrifugal separator according to claim 11, characterized in that: The separation disc further comprises a plurality of drainage ribs, each of which is arranged on the inner side wall of the separation disc at equal or unequal intervals. The drainage ribs extend from the upper end opening to the lower end opening of the separation disc and gradually increase in thickness from top to bottom.

14. The forward and reverse rotating self-cleaning centrifugal separator according to claim 11, characterized in that: In the direction from the upper end to the lower end of the main shaft, the throttling effect of the throttling ribs of the separation disk on the oil-gas mixture gradually decreases.

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