A spin centrifugal filter

Abstract

The present invention discloses a spin centrifugal filter. The rotating centrifugal device includes: a central axis, a partition plate provided radially inside a rotor structure, the partition plate dividing the inside of the rotor structure into a circulation drive part and a filtration drive part, the circulation drive part and the filtration drive part can independently or cooperatively drive the rotor structure to rotate to generate centrifugal force for centrifugal filtration of the fluid; a flow direction control core shaft that can be controllably moved along the axial direction is provided inside the central axis, and the flow ratio of the fluid entering the circulation drive part and the filtration drive part is changed by adjusting the position of the flow direction control core shaft relative to the central axis. The circulating flow of the fluid in the circulation drive part forms a continuous push on the rotor structure; when the filtration flow of the filter membrane decreases, the circulation drive part can still maintain the continuous high-speed rotation of the rotor structure, so that the rotational driving force of the rotor structure can be maintained, thereby avoiding the decrease in the centrifugal filtration effect.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal filters, in particular to a spin centrifugal filter. Background Art

[0002] A centrifuge is a machine that uses centrifugal force to accelerate the separation of different materials. Centrifuges are widely used in chemical, petroleum, food, pharmaceutical, mineral processing, coal, water treatment and shipbuilding industries.

[0003] The main principle of the filter centrifuge is to use the centrifugal force generated by the high-speed rotation of the centrifugal drum (with appropriate filter materials) to accelerate the liquid phase in the solid-liquid mixture out of the drum, while leaving the solid phase in the drum, thereby achieving the effect of separating solids and liquids, or commonly known as dehydration.

[0004] Figure 1 This is a cross-sectional view of a conventional centrifugal filter. As shown, the conventional centrifugal filter comprises a shaft 10, with a flow path formed therein for fluid to flow in; a rotor structure 20, which rotates about the shaft 10 to generate centrifugal force, with filter paper 21 provided on the inner wall of the rotor structure 20 to filter impurities; a spindle tube 30, which rotates along with the rotor structure 20 about the shaft 10, extracting fluid through the shaft 10 and spraying it into the interior of the rotor structure 20; and a separation membrane 40, which separates the interior of the rotor structure 20 into upper and lower sections. Centrifugal force accumulates impurities separated from the fluid in the upper space S1, while the filtered fluid flows to the lower space S2 and is discharged through a nozzle 50 located at the lower end of the rotor structure 20. In the existing centrifugal filter, the fluid flowing in from the shaft 10 is sprayed into the interior of the rotor structure 20 through the nozzle hole 31 set in the main shaft tube 30, and the impurities in the fluid are deposited on the wall surface of the rotor structure 20 or on the separation membrane through the centrifugal force generated by the rotation of the rotor structure 20 to achieve separation. The filtered fluid flows into the lower space S2 of the rotor through the sheet 40 and is sprayed out through the nozzle 50. The fluid sprayed through the nozzle 50 uses the reverse thrust of the fluid to continuously drive the rotor structure to rotate, thereby forming a spinning centrifuge.

[0005] Other spin-type centrifugal filters with similar structures to the above include: Patent Document 1 (Application Number: CN201080039463.9) a centrifugal filter; Patent Document 2 (Application Number: CN201180013483.3) a centrifugal separator with protected bearings; Patent Document 3 (Application Number: CN201580037411.0) a centrifugal filter including a three-dimensional filter.

[0006] Many of the aforementioned existing technologies utilize pressurized fluid injected into the rotor barrel from the central axis. Once the rotor barrel is fully filled, the fluid is ejected at high speed through a nozzle positioned tangentially below the rotor barrel. This reverse thrust continuously accelerates the rotor's rotation, thereby centrifugally filtering the fluid within the rotor barrel. Their drawbacks include the following: 1. To achieve the desired filtration and separation effect, a filter membrane is indispensable within the rotor barrel, resulting in a pressure drop in the filtered fluid. This pressure drop directly reduces the centrifugal driving force of the rotor barrel. Furthermore, as filtration time increases, the filter membrane becomes increasingly clogged, leading to a significant pressure drop after the fluid passes through the filter membrane, causing a sudden drop in rotor barrel speed and poor centrifugal separation.

[0007] 2. The rotation speed of the rotor barrel cannot be directly and effectively controlled. For example, when facing the previous problem, when the filtration flow rate of the filter membrane decreases, the only way is to increase the pressure of the fluid, that is, to increase the outlet pressure of the fluid delivery pump to maintain the fluid flow through the filter membrane. Such adjustment has a great impact on the operating efficiency and service life of the pump, and is also directly affected by the filter membrane, resulting in poor adjustment effect.

[0008] 3. In the prior art, the rotor barrel speed increases slowly at the initial stage of startup, and an effective centrifugal separation effect cannot be achieved in the initial stage of startup. The fluid must gradually fill the rotor barrel and be ejected from the nozzle, and then gradually accelerate to gradually increase the speed. In addition, when the rotor barrel is filled with fluid, its total weight increases significantly, and its static inertia is large, resulting in the nozzle pushing the fully loaded rotor barrel to rotate slowly.

[0009] In view of the above, it is necessary to propose a spin centrifugal filter to solve the above problems. Summary of the Invention

[0010] The purpose of the present invention is to solve the above technical problems and provide a spin centrifugal filter.

[0011] In order to achieve the above object, the present invention adopts the following technical solution: a spin centrifugal filter, comprising a base, a shell covering the base, and a rotating centrifugal device rotatably connected between the base and the shell, the rotating centrifugal device comprising:

[0012] The central shaft has a flow path formed inside thereof for introducing fluid, and the lower end of the central shaft is rotatably connected to the center of the base;

[0013] a rotor structure, wherein the rotor structure rotates about the central axis and generates centrifugal force; a partition plate is provided radially inside the rotor structure, and the partition plate divides the interior of the rotor structure into a circulation drive portion and a filtration drive portion, wherein the circulation drive portion and the filtration drive portion can independently or cooperatively drive the rotor structure to rotate to generate centrifugal force for centrifugal filtration of the fluid; a lower nozzle is provided at the lower portion of the circulation drive portion, and an upper nozzle is provided on the lower outer wall of the filtration drive portion;

[0014] The flow path in the central axis passes through the side wall of the central axis and is provided with an upper outflow hole and a lower outflow hole; the upper outflow hole is located in the filter drive part and the lower outflow hole is located in the circulation drive part. The central axis is provided with a flow direction control core shaft which can be moved in a controllable manner along the axial direction. The flow ratio of the fluid entering the circulation drive part and the filter drive part is changed by adjusting the position of the flow direction control core shaft relative to the central axis.

[0015] Furthermore, a accommodating chamber for installing a rotating centrifugal device is formed between the shell and the base, and a separating ring is provided in the accommodating chamber, and a rotating sealing connection is formed between the outer wall of the rotor structure and the inner ring of the separating ring; the outer ring of the separating ring is sealed with the inner wall of the accommodating chamber, so that the separating ring separates the accommodating chamber into a circulation chamber and a filtration chamber.

[0016] Furthermore, a feed pipe is provided in the base, the central axis is a hollow tube with an opening at the lower end, and one end of the feed pipe is introduced into the opening at the lower end of the central axis; the flow direction control core shaft is a cylindrical shaft with an opening at the lower end, and its lower end opening is connected to the feed pipe, and the side wall of the flow direction control core shaft is provided with an upper through hole and a lower through hole, and the flow direction control core shaft can control the upper through hole to cooperate with the upper outflow hole, and the lower through hole to cooperate with the lower outflow hole.

[0017] Furthermore, a core shaft control portion for controlling the movement of the position of the flow control core shaft is provided inside the upper end of the central shaft. The flow direction control core shaft is located at the lower dead point, and the lower through hole corresponds to the lower outlet hole so that the fluid flows into the circulation drive portion, while the upper outlet hole is closed; the flow direction control core shaft is located at the upper dead point, and the upper through hole corresponds to the upper outlet hole so that the fluid flows into the filtration drive portion; the flow direction control core shaft is located at the middle position, so that the lower through hole and the lower outlet hole, and the upper through hole and the upper outlet hole are all in a staggered half-open state.

[0018] Furthermore, a filter discharge pipe is connected to the side wall of the shell, and the end of the filter discharge pipe is connected to the filter chamber; a circulation discharge pipe is also provided in the base, and the end of the circulation discharge pipe is connected to the circulation chamber.

[0019] Furthermore, the core shaft control part includes an armature, a solenoid coil, and a spring; the armature is fixedly connected to the upper end of the flow control core shaft along the axial direction, the solenoid coil is arranged inside the central shaft, and the spring is arranged between the end of the armature and the inner bottom wall of the central shaft.

[0020] Furthermore, the core shaft control part includes a drive motor, a screw, and a screw sleeve. The drive motor is fixedly arranged on the inner bottom wall of the central shaft, and the output end of the drive motor is connected to the screw. The screw sleeve is fixedly arranged on the upper end of the flow control core shaft, and the screw sleeve is threadedly connected to the screw.

[0021] Furthermore, the rotor structure also includes a sleeve coaxially arranged with the central axis, the inner wall of the sleeve is provided with filter paper for adsorbing fluid impurities, and a separation membrane is also provided in the filter drive unit. The upper outflow hole and the upper nozzle are respectively located on both sides of the separation membrane, and the filter paper is provided on the side where the upper outflow hole is provided.

[0022] Furthermore, a rotating nozzle is provided on the outer rotating sleeve of the upper outflow hole, and a plurality of ejection holes with rectangular openings are evenly spaced on the outer peripheral side wall of the rotating nozzle. The ejection holes penetrate the side wall of the rotating nozzle in an oblique direction. The ejection holes opened in the oblique direction are used to make the ejected fluid apply a rotational torque to the rotating nozzle, so that a speed difference is formed between the rotating nozzle and the rotor structure.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention is provided with a circulation drive part and a filtration drive part separated by a partition plate. The circulating flow of the fluid in the circulation drive part can be used to continuously push the rotor structure. When the filtration flow of the filter membrane decreases, the circulation drive part can still maintain the continuous high-speed rotation of the rotor structure, so that the rotational driving force of the rotor structure can be maintained, thereby avoiding the decline of the centrifugal filtration effect.

[0025] 2. A new method for controlling the speed of the rotor structure is proposed, which avoids the defect of the existing technology that the speed of the rotor structure can only be maintained by controlling the outlet pressure of the fluid delivery pump.

[0026] 3. The present invention can quickly reach the centrifugal separation speed at the initial stage of operation of the device. During startup, the fluid first fills the circulation drive part. The internal space of the circulation drive part is small, which is convenient for rapid filling of the fluid. In addition, the fluid filling the cavity of the circulation drive part has a small weight increase on the overall rotor structure, which is also convenient for rapid increase in speed. After the speed is increased, the distribution of the fluid is changed by the flow control core shaft, thereby achieving the purpose of rapid speed increase in the initial stage of startup. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of an existing centrifugal filter;

[0028] Figure 2 This is a structural diagram of the flow direction control core shaft of the spin centrifugal filter of this application located at the bottom dead center;

[0029] Figure 3This is a schematic diagram of the structure with the flow control core shaft located in the middle position;

[0030] Figure 4 This is a structural diagram of the flow control core shaft located at the bottom dead center;

[0031] Figure 5 for Figure 4 Schematic diagram of the structure of the AA section;

[0032] Figure 6 for Figure 4 Schematic diagram of the structure of the middle BB section;

[0033] Figure 7 It is a structural diagram of the core shaft control unit;

[0034] Figure 8 for Figure 7 Schematic diagram of the structure of the AA section;

[0035] In the figure: 1. base; 2. outer shell; 3. central axis; 4. rotor structure; 5. partition plate; 6. circulation drive unit; 7. filtration drive unit; 8. lower nozzle; 9. upper nozzle; 35. upper outflow hole; 11. lower outflow hole; 12. flow control core shaft; 13. partition ring; 14. circulation chamber; 15. filtration chamber; 16. feed pipe; 17. upper through hole; 18. lower through hole; 19. filtration discharge pipe; 36. circulation discharge pipe; 37. armature; 22. solenoid coil; 23. spring; 24. drive motor; 25. screw; 26. screw sleeve; 27. sleeve; 28. partition membrane; 29. ​​rotating nozzle; 38. discharge hole. DETAILED DESCRIPTION

[0036] The technical solutions of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0037] Example 1:

[0038] A spin centrifugal filter, which is the same as the prior art, is as follows: Figure 1 As shown, it includes a base 1, a shell 2 covering the base 1, and a rotating centrifugal device rotatably connected between the base 1 and the shell 2. A feed pipe 16 is provided in the base 1, and the central axis 3 is a hollow tube with an opening at the lower end. One end of the feed pipe 16 is introduced into the opening at the lower end of the central axis 3; the flow direction control core shaft 12 is a cylindrical shaft with an opening at the lower end, and its lower end opening is connected to the feed pipe 16. In actual use, the output end of the fluid delivery pump is connected to the feed pipe 16, and the high-pressure fluid is delivered into the flow path in the central axis 3, so that the fluid enters the rotor structure 4, and the fluid is ejected from the nozzle to drive the rotor structure 4 to spin, thereby realizing centrifugal operation.

[0039] The difference is that: the central shaft 3 has a flow path formed inside it for introducing fluid, and the lower end of the central shaft 3 is rotatably connected to the center of the base 1; the central shaft 3 is provided with a flow direction control core shaft 12 that can be moved in a controllable manner along the axial direction.

[0040] The rotor structure 4 rotates around the central axis 3 and generates centrifugal force; a partition plate 5 is provided radially inside the rotor structure 4, and the partition plate 5 divides the inside of the rotor structure 4 into a circulation drive part 6 and a filtration drive part 7, as shown in FIG. Figure 2-4 As shown, the partition plate 5 separates the two independent chambers, namely the circulation drive part 6 and the filtration drive part 7, and the space in the circulation drive part 6 is much smaller than the chamber space in the filtration drive part 7. In actual use, the fluid is first filled into the circulation drive part 6. By utilizing the characteristics of the small chamber space and fast fluid filling speed, the rotor structure 4 as a whole can achieve a rapid speed increase, and thus the rotation speed of centrifugal filtration separation can be quickly reached at the initial start-up of the equipment.

[0041] It can be understood that the circulation drive unit 6 is only used to maintain the rotational speed of the rotor structure 4, while the filter drive unit 7 is used to centrifugally filter the fluid, and similarly, the filter drive unit 7 also has the ability to drive the rotor structure 4 to perform centrifugal spinning. The circulation drive unit 6 and the filter drive unit 7 can independently or collaboratively drive the rotor structure 4 to rotate to generate centrifugal force to centrifugally filter the fluid. Specifically, the lower part of the circulation drive unit 6 is provided with a lower nozzle 8, and the lower outer wall of the filter drive unit 7 is provided with an upper nozzle 9; and the flow direction control core shaft 12 in the central axis 3 is used to guide the fluid into the circulation drive unit 6 and / or the filter drive unit 7 respectively, as shown in FIG. Figure 5 As shown, when the fluid is guided by the control core shaft 12 into the circulation drive unit 6, it is ejected through the lower nozzle 8 and drives the rotor structure 4 to rotate; Figure 6 As shown, when the fluid is guided into the filter drive unit 7, it is ejected through the upper nozzle 9, which can also drive the rotor structure 4 to rotate. It can be understood that the upper nozzle 9 and the lower nozzle 8 should have the same ejection direction, so that the rotor structure 4 can be driven to rotate continuously in the same direction.

[0042] Specifically, the flow path in the central shaft 3 passes through the side wall of the central shaft 3 and is provided with an upper outflow hole 35 and a lower outflow hole 11; the upper outflow hole 35 is located in the filter drive part 7 and the lower outflow hole 11 is located in the circulation drive part 6; the flow ratio of the fluid entering the circulation drive part 6 and the filter drive part 7 is changed by adjusting the position of the flow direction control core shaft 12 relative to the central shaft 3.

[0043] The rotor structure 4 further includes a sleeve 27 coaxially arranged with the central axis 3. The inner wall of the sleeve 27 is provided with a filter paper (not shown in the drawings) for absorbing fluid impurities. Figure 3 、 Figure 7 As shown, a separation membrane 28 is further provided in the filter drive unit 7 , and the separation membrane 28 is used to centrifugally filter the fluid. The upper outflow hole 35 and the upper nozzle 9 are respectively located on both sides of the separation membrane 28 , and the filter paper is arranged on the side where the upper outflow hole 35 is provided.

[0044] Example 2:

[0045] An upper through hole 17 and a lower through hole 18 are provided on the side wall of the flow direction control core shaft 12. The flow direction control core shaft 12 can control the upper through hole 17 to cooperate with the upper outflow hole 35, and the lower through hole 18 to cooperate with the lower outflow hole 11. It can be understood that when the lower through hole 18 and the lower outflow hole 11 are positioned correspondingly, the fluid flows from the feed pipe 16 through the lower through hole 18 and the lower outflow hole 11 into the circulation drive unit 6; similarly, when the upper through hole 17 and the upper outflow hole 35 are positioned correspondingly, the fluid enters the flow direction control core shaft 12 from the feed pipe 16 and flows into the filter drive unit 7 from the upper through hole 17 and the upper outflow hole 35.

[0046] Specifically, a core shaft control portion for controlling the position movement of the flow direction control core shaft 12 is provided inside the upper end of the central shaft 3. During actual use, the flow direction control core shaft 12 and the central shaft 3 do not rotate relative to each other, and the core shaft control portion can pull or push the flow control core shaft to move along the axial direction of the central shaft 3; during processing, a key and groove that limit the relative rotation of the two can be set to cooperate so that the flow control core shaft can slide freely along the axial direction.

[0047] like Figure 2 As shown, the core shaft control part controls the flow control core shaft to be located at the lowest end position, that is, the flow direction control core shaft 12 is located at the lower dead point. At this time, the lower through hole 18 corresponds to the lower outlet hole so that the fluid flows into the circulation drive part 6. It can be understood that the distance between the upper through hole 17 and the lower through hole 18 is smaller than the distance between the lower outlet hole 11 and the upper outlet hole 35 by the length of one hole position. Therefore, when located at the lower dead point, the upper through hole 17 and the upper outlet hole 35 are offset from each other, so that the upper outlet hole 35 is closed.

[0048] Similar, such as Figure 4 As shown, the spindle control unit controls the flow control spindle to be at the uppermost position, that is, the flow direction control spindle 12 is at the top dead center, the upper through hole 17 corresponds to the upper outflow hole 35 so that the fluid flows into the filter drive unit 7, and the lower outflow hole 11 is closed;

[0049] like Figure 3As shown, the flow control core shaft 12 is controlled by the core shaft control part to be located in the middle position, so that the lower through hole 18 and the lower outflow hole 11, and the upper through hole 17 and the upper outflow hole 35 are both in a staggered half-open state; that is, the upper outflow hole 35 and the lower outflow hole 11 are both open, and the opening degrees of the two are complementary. It can be understood that the degree of complementarity of the opening degrees of the two depends on the height of the middle position of the flow control core shaft.

[0050] It can be understood that, according to the above description, during actual control, at the initial start-up of the rotor structure 4, the flow control core shaft should be controlled to the lower dead point position, so that the fluid enters the circulation drive part 6 with a small space and is easier to fill, so that the lower nozzle 8 can be used to quickly drive the rotor structure 4 to quickly reach a high-speed operation state; then, under the control of the core shaft control part, the flow control core shaft is controlled to the middle position, so that the fluid can enter the filter drive part 7, gradually filling the inner cavity of the filter drive part 7, and cooperatively drive the rotor structure 4 to rotate rapidly through the upper nozzle 9; then, the circulation volume of the fluid can be reduced, and converted to all entering the filter drive part 7 to realize the centrifugal filtration operation of all fluids; then, when the separation membrane 28 is operated for a long time, the filtration flow rate decreases, resulting in a decrease in the speed of the rotor structure 4. At this time, it can be controlled to return to the middle position, so that the circulation drive part 6 can be used to assist the rotor structure 4 to maintain high-speed rotation.

[0051] Furthermore, in order to coordinate the drainage of the fluids flowing out of the circulation drive unit 6 and the filtration drive unit 7, the fluid of the circulation drive unit 6 flows back to the front end of the fluid delivery pump to realize fluid circulation; and the fluid after centrifugal filtration of the filtration drive unit 7 is diverted out.

[0052] Specifically, such as Figure 2 As shown, a accommodating chamber for installing a rotating centrifugal device is formed between the shell 2 and the base 1, and a separator ring 13 is provided in the accommodating chamber. The setting direction of the plane where the separator ring 13 is located is designed along the radial plane of the rotor structure 4, and a rotating sealing connection is formed between the outer wall of the rotor structure 4 and the inner ring of the separator ring 13; the outer ring of the separator ring 13 is sealed with the inner wall of the accommodating chamber, so that the separator ring 13 separates the accommodating chamber into a circulation chamber 14 and a filtration chamber 15.

[0053] A filter discharge pipe 19 is connected to the side wall of the housing 2, the end of which is connected to the filter chamber 15. A circulation discharge pipe 36 is also provided within the base 1, the end of which is connected to the circulation chamber 14. The fluid flowing out of the filter discharge pipe 19 is the product fluid that has been centrifugally filtered through the separation membrane 28. The circulation discharge pipe 36 is connected back to the front end of the fluid delivery pump to ensure circulation.

[0054] Example 3:

[0055] like Figure 7As shown, the core shaft control part includes a drive motor 24, a screw 25, and a screw sleeve 26. The drive motor 24 is fixedly arranged on the inner bottom wall of the central shaft 3, and the output end of the drive motor 24 is connected to the screw 25. The screw sleeve 26 is fixedly arranged on the upper end of the flow direction control core shaft 12, and the screw sleeve 26 is threadedly connected to the screw 25; when it is necessary to change the position of the flow direction control core shaft 12, the drive motor 24 is operated, and the screw 25 is rotated to control the relative position of the screw sleeve 26 to change, thereby realizing the control and adjustment of the top dead center, the bottom dead center, and the middle position. It can be understood that the control of the middle position in this embodiment can make the flow control core shaft stay at any position between the bottom dead center and the top dead center, thereby controlling the change of the opening of the upper outflow hole 35 and the lower outflow hole 11; it can be understood that the power connection of the drive motor 24 can be realized by a conductive slip ring.

[0056] Example 4:

[0057] like Figure 2-4 As shown, this embodiment shows the structure of another core shaft control part. Specifically, the core shaft control part includes an armature 37, a solenoid 22, and a spring 23; the armature 37 is fixedly connected to the upper end of the flow control core shaft 12 along the axial direction, the solenoid 22 is arranged inside the center shaft 3, and the spring 23 is arranged between the end of the armature 37 and the inner bottom wall of the center shaft 3; it can be understood that the principle of electromagnet is utilized to energize the solenoid 22 to generate magnetic force, pulling the armature 37 to move the position, thereby realizing the position change of multiple control points described in Example 2. It can be understood that the power connection in this embodiment can also be carried out in the form of a conductive slip ring.

[0058] Embodiment 5:

[0059] The outer portion of the upper outflow hole 35 is provided with a rotating nozzle 29. Figure 7 、 Figure 8 As shown, a plurality of ejection holes 38 with rectangular openings are evenly spaced on the outer peripheral side wall of the rotating nozzle 29. The ejection holes 38 penetrate the side wall of the rotating nozzle 29 in an oblique direction. The ejection holes 38 opened in the oblique direction are used to make the ejected fluid apply a rotational torque to the rotating nozzle 29, so that a speed difference is formed between the rotating nozzle 29 and the rotor structure 4. This embodiment can change the ejection direction of the fluid entering the filter drive unit, thereby avoiding the fluid from being fixedly ejected at a fixed position on the filter paper, thereby avoiding wear of the filter paper.

[0060] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A spin centrifugal filter, comprising a base (1), a housing (2) covering the base (1), and a rotating centrifugal device rotatably connected between the base (1) and the housing (2), characterized in that: The rotating centrifugal device comprises: A central shaft (3) is formed with a flow path therein for introducing fluid, and the lower end of the central shaft (3) is rotatably connected to the center of the base (1); A rotor structure (4), wherein the rotor structure (4) rotates around the central axis (3) and generates centrifugal force; a partition plate (5) is provided radially inside the rotor structure (4), and the partition plate (5) divides the inside of the rotor structure (4) into a circulation drive portion (6) and a filter drive portion (7); the circulation drive portion (6) and the filter drive portion (7) can independently or cooperatively drive the rotor structure (4) to rotate and generate centrifugal force to centrifugally filter the fluid; a lower nozzle (8) is provided at the lower portion of the circulation drive portion (6), and an upper nozzle (9) is provided on the outer wall of the lower portion of the filter drive portion (7); The flow path in the central shaft (3) passes through the side wall of the central shaft (3) and is provided with an upper outflow hole (35) and a lower outflow hole (11); the upper outflow hole (35) is located in the filter drive part (7), and the lower outflow hole (11) is located in the circulation drive part (6); a flow direction control core shaft (12) that can be controllably moved along the axial direction is provided in the central shaft (3); the flow ratio of the fluid entering the circulation drive part (6) and the filter drive part (7) is changed by adjusting the position of the flow direction control core shaft (12) relative to the central shaft (3); A feed pipe (16) is provided in the base (1), and an output end of the fluid delivery pump is connected to the feed pipe (16).

2. A spin centrifugal filter according to claim 1, characterized in that: A accommodating chamber for installing a rotating centrifugal device is formed between the housing (2) and the base (1), and a separating ring (13) is provided in the accommodating chamber. A rotating sealing connection is formed between the outer wall of the rotor structure (4) and the inner ring of the separating ring (13); the outer ring of the separating ring (13) is sealed with the inner wall of the accommodating chamber, so that the separating ring (13) separates the accommodating chamber into a circulation chamber (14) and a filtration chamber (15).

3. A spin centrifugal filter according to claim 2, characterized in that: The central shaft (3) is a hollow tube with an opening at the lower end, and one end of the feed pipe (16) is introduced into the lower opening of the central shaft (3); the flow direction control core shaft (12) is a cylindrical shaft with an opening at the lower end, and its lower opening is connected to the feed pipe (16). The side wall of the flow direction control core shaft (12) is provided with an upper through hole (17) and a lower through hole (18). The flow direction control core shaft (12) can control the upper through hole (17) to cooperate with the upper outflow hole (35) and the lower through hole (18) to cooperate with the lower outflow hole (11).

4. A spin centrifugal filter according to claim 3, characterized in that: A core shaft control portion for controlling the position movement of the flow direction control core shaft (12) is provided inside the upper end of the central shaft (3); the flow direction control core shaft (12) is located at the lower dead center, the lower through hole (18) corresponds to the lower outflow hole, so that the fluid flows into the circulation drive portion (6), and the upper outflow hole (35) is closed; the flow direction control core shaft (12) is located at the upper dead center, the upper through hole (17) corresponds to the upper outflow hole (35), so that the fluid flows into the filter drive portion (7); the flow direction control core shaft (12) is located at the middle position, so that the lower through hole (18) and the lower outflow hole (11), and the upper through hole (17) and the upper outflow hole (35) are all in a staggered half-open state.

5. A spin centrifugal filter according to any one of claims 2 to 4, characterized in that: A filter discharge pipe (19) is connected to the side wall of the housing (2), and the end of the filter discharge pipe (19) is connected to the filter chamber (15); a circulation discharge pipe (36) is also provided in the base (1), and the end of the circulation discharge pipe (36) is connected to the circulation chamber (14).

6. A spin centrifugal filter according to claim 4, characterized in that: The core shaft control portion comprises an armature (37), a solenoid coil (22), and a spring (23); the armature (37) is fixedly connected to the upper end of the flow direction control core shaft (12) along the axial direction, the solenoid coil (22) is arranged inside the central shaft (3), and the spring (23) is arranged between the end of the armature (37) and the inner bottom wall of the central shaft (3).

7. A spin centrifugal filter according to claim 4, characterized in that: The core shaft control part comprises a driving motor (24), a screw (25), and a screw sleeve (26); the driving motor (24) is fixedly arranged on the inner bottom wall of the central shaft (3); the output end of the driving motor (24) is connected to the screw (25); the screw sleeve (26) is fixedly arranged on the upper end of the flow direction control core shaft (12); and the screw sleeve (26) is threadedly connected to the screw (25).

8. The spin centrifugal filter according to claim 1, characterized in that: The rotor structure (4) further includes a sleeve (27) coaxially arranged with the central axis (3), the inner wall of the sleeve (27) is provided with filter paper for adsorbing fluid impurities, a separation membrane (28) is further provided in the filter drive unit (7), the upper outflow hole (35) and the upper nozzle (9) are respectively located on both sides of the separation membrane (28), and the filter paper is provided on the side where the upper outflow hole (35) is provided.

9. A spin centrifugal filter according to claim 8, characterized in that: The upper outflow hole (35) is provided with a rotating nozzle (29) on the outer side of the rotating nozzle (29). A plurality of ejection holes (38) with rectangular openings are evenly spaced on the outer peripheral side wall of the rotating nozzle (29). The ejection holes (38) penetrate the side wall of the rotating nozzle (29) along an oblique direction. The ejected fluid exerts a rotational torque on the rotating nozzle (29) by utilizing the ejection holes (38) opened in the oblique direction, thereby forming a rotational speed difference between the rotating nozzle (29) and the rotor structure (4).

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