A magnetic vortex pump structure capable of cleaning magnetic particles from the surface of an inner magnet

Abstract

The utility model relates to a kind of magnetic vortex pump structure of inner magnet surface magnetic particle can be cleaned, and magnetic vortex pump includes pump shell, impeller being located in pump shell, shaft A of driving impeller, inner rotor being connected with shaft A, several inner permanent magnets being installed on inner rotor, outer rotor coupling being connected with the shaft B on three-phase asynchronous motor and several outer permanent magnets being installed in outer rotor coupling and being magnetically coupled with above-mentioned inner permanent magnet;For flushing the magnetic particle of inner permanent magnet surface of inner permanent magnet surface magnetic particle flushing structure and for the magnetic channel of the magnetic particle after peeling is guided to pump cavity.Clean structure is set on inner magnet assembly in the utility model, can continuously separate and guide out the magnetic particle adsorbed on the surface of inner magnet during the operation of magnetic vortex pump, significantly reduce the accumulation of particulate matter, keep the surface of inner magnet clean, avoid the local overheating or magnetic performance attenuation caused by particle accumulation.

Description

Technical Field

[0001] This utility model relates to the technical field of magnetic vortex pumps, and in particular to a magnetic vortex pump structure that can clean magnetic particles from the surface of an inner magnet. Background Technology

[0002] Magnetic vortex pumps, as a seal-free fluid transfer device, are widely used in fields with extremely stringent leakage requirements, such as chemical, pharmaceutical, semiconductor, and food industries. Their working principle involves the rotation of the external magnet assembly, which, through magnetic coupling, drives the synchronous rotation of the internal magnet assembly, thereby driving the impeller or turbine within the pump to pressurize and transport the fluid. By eliminating the traditional mechanical shaft seal, magnetic vortex pumps fundamentally avoid leakage problems during operation, offering high safety and reliability.

[0003] However, in actual operation, especially when conveying media containing small particles or with strong magnetic responsiveness, some magnetic particles are easily attracted to the surface of the inner magnet by the magnetic field within the pump chamber. These attached magnetic particles not only form local accumulations, exacerbating friction and wear between the inner magnet protective sleeve and the isolation sleeve, but may also cause local demagnetization of the magnet, affecting magnetic force transmission efficiency. In severe cases, it can even cause the inner magnet to jam or the pump body to vibrate more, reducing the operational stability and service life of the equipment. Conventional magnetic vortex pumps lack a self-cleaning function for the inner magnet surface. Adhering particles can usually only be removed by stopping the machine for disassembly and manual cleaning, which not only increases maintenance costs and downtime but also affects the continuity of production.

[0004] A search revealed that patent application number 2010105117333 discloses a magnetic filter for filtering and adsorbing magnetic substances suspended in a fluid. The adsorption tube of the magnetic filter can detach from the magnetic rod and lose its magnetism, thus causing the magnetic particles adsorbed on the adsorption tube to fall off. Patent application number 2021224578061 discloses a magnetic particle removal device and a slurry mixer. When magnetic particles are adsorbed onto the adsorption component, the cross-sectional area of ​​the adsorption component increases, resulting in a decrease in its overall resistance. The change in the resistance value of the adsorption component can be detected by a detection component to determine the degree of magnetic particle removal. Neither of these inventions is applicable to the removal of magnetic particles from the surface of magnets within a magnetic vortex pump.

[0005] A brief summary of the existing shortcomings:

[0006] (1) Due to the compact and complex internal structure of the magnetic vortex pump, it is difficult to ensure that all magnetic particles attached to the magnet surface can be completely removed by using external adsorption methods.

[0007] (2) The internal space of the magnetic vortex pump is limited. Adding additional detection components may be limited by space and may also interfere with the normal operation of the pump.

[0008] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a magnetic vortex pump structure that can clean magnetic particles on the surface of the inner magnet, making it more valuable for industrial use. Utility Model Content

[0009] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a magnetic vortex pump structure that can clean magnetic particles from the surface of an inner magnet.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A magnetic vortex pump structure for cleaning magnetic particles on the surface of an inner magnet includes a magnetic vortex pump, which includes a pump casing, an impeller disposed within the pump casing, a shaft A for driving the impeller, an inner rotor connected to the shaft A, a plurality of inner permanent magnets mounted on the inner rotor, an outer rotor coupling connected to a shaft B on a three-phase asynchronous motor, and a plurality of outer permanent magnets mounted in the outer rotor coupling and magnetically coupled to the aforementioned inner permanent magnets.

[0012] Also includes:

[0013] The inner magnet surface magnetic particle flushing structure is used to flush the magnetic particles on the surface of the inner permanent magnet, and the magnetic cleaning channel is used to remove the detached magnetic particles from the pump cavity.

[0014] The magnetic particle flushing structure on the inner magnet surface includes a drainage pipe and a flushing nozzle. One end of the drainage pipe is connected to the outlet pipe section of the magnetic vortex pump on the magnetic vortex pump, and the other end is connected to the flushing nozzle, which is located between the inner permanent magnet and the outer permanent magnet.

[0015] The magnetic clearing channel is an internal flow channel located inside the pump casing. One end of the channel is located in the gap between the inner rotor and the pump casing, and the other end is located in the low-pressure area at the impeller inlet.

[0016] As a further improvement of this utility model, the flushing nozzle includes a plurality of nozzle assemblies evenly distributed along the axial direction.

[0017] As a further improvement of this utility model, the nozzle assembly includes a plurality of nozzles evenly distributed along the radial direction, and the nozzles are inclined toward the side of the inner permanent magnet.

[0018] As a further improvement of this utility model, the drainage pipeline is integrated inside the pump casing or fixed to the outside of the pump casing.

[0019] As a further improvement of this utility model, the other end of the magnetic clearing channel opens towards the central axis of the impeller.

[0020] As a further improvement of this utility model, the inner rotor is interference-fitted with the shaft A of the driving impeller through a clamping ring, and the impeller is connected to the shaft A through a key A.

[0021] As a further improvement of this utility model, a limiting sleeve is installed on shaft A. The limiting sleeve is interference-fitted with shaft A and is used for axial positioning of the impeller or inner rotor.

[0022] As a further improvement of this utility model, the external rotor coupling is connected to the shaft B on the output end of the three-phase asynchronous motor via key B.

[0023] By means of the above solution, this utility model has at least the following advantages:

[0024] This invention, by setting a dedicated cleaning structure on the inner magnet assembly, can continuously peel off and export magnetic particles adsorbed on the surface of the inner magnet during the operation of the magnetic vortex pump, significantly reducing the accumulation of particles, keeping the surface of the inner magnet clean, and avoiding local overheating or magnetic performance attenuation caused by particle accumulation.

[0025] The cleaning structure of this invention can be integrated inside the pump body, enabling automatic cleaning of the inner magnet surface without disassembly. This greatly reduces downtime caused by manual cleaning and improves production continuity and equipment maintainability.

[0026] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a magnetic vortex pump that can clean magnetic particles from the surface of an inner magnet according to this utility model.

[0029] Figure 2 yes Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0030] Figure 3 yes Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0031] The meanings of the labels in the figures are as follows.

[0032] Magnetic vortex pump 1, shaft A2, limit sleeve 3, key A4, impeller 5, pump casing 6, inner rotor 7, clamping ring 8, inner permanent magnet 9, outer permanent magnet 10, outer rotor coupling 11, key B12, shaft B13, three-phase asynchronous motor 14, magnetic particle flushing structure on inner magnet surface 15, flushing nozzle 16, drainage pipeline 17, magnetic vortex pump outlet pipe section 18, magnetic cleaning channel 19. Detailed Implementation

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] The first embodiment of this utility model:

[0036] like Figures 1-3 As shown, the magnetic vortex pump structure for cleaning magnetic particles on the surface of an inner magnet in this embodiment mainly consists of three parts: a magnetic vortex pump 1, an inner magnet surface magnetic particle flushing structure 15 for flushing magnetic particles on the surface of the inner permanent magnet 9, and a magnetic cleaning channel 19 for dislodging the magnetic particles from the pump chamber.

[0037] The magnetic vortex pump 1 includes a pump casing 6, an impeller 5 disposed within the pump casing 6, a shaft A2 driving the impeller 5, an inner rotor 7 connected to the shaft A2, a plurality of inner permanent magnets 9 mounted on the inner rotor 7, an outer rotor coupling 11 connected to the shaft B13 of the three-phase asynchronous motor 14, and a plurality of outer permanent magnets 10 mounted in the outer rotor coupling 11 and magnetically coupled to the aforementioned inner permanent magnets 9.

[0038] The inner rotor 7 is interference-fitted with the shaft A2 of the drive impeller 5 via a retaining ring 8. The impeller 5 is connected to the shaft A2 via a key A4. A limiting sleeve 3 is installed on the shaft A2, and the limiting sleeve 3 is interference-fitted with the shaft A2 to provide axial positioning for the impeller 5 or the inner rotor 7. The outer rotor coupling 11 is connected to the shaft B13 on the output end of the three-phase asynchronous motor 14 via a key B12.

[0039] After the three-phase asynchronous motor 14 starts, the drive shaft B13 rotates, which in turn drives the outer rotor coupling 11 and its outer permanent magnet 10 to rotate together via key B12. The rotating magnetic field generated by the outer permanent magnet 10 drives the inner permanent magnet 9 mounted on the inner rotor 7 to rotate synchronously through magnetic coupling. The inner rotor 7 is fixed to the shaft A2 via the clamping ring 8, thereby driving the shaft A2 to rotate. The torque of the shaft A2 is transmitted to the impeller 5 via key A4, causing the impeller 5 to rotate at high speed within the pump casing 6, thereby pressurizing and transporting the fluid.

[0040] The magnetic particle flushing structure 15 on the inner magnet surface includes a drainage pipe 17 and a flushing nozzle 16. One end of the drainage pipe 17 is connected to the magnetic vortex pump outlet pipe section 18 on the magnetic vortex pump 1, and the other end is connected to the flushing nozzle 16. The flushing nozzle 16 is located between the inner permanent magnet 9 and the outer permanent magnet 10.

[0041] The flushing nozzle 16 includes a plurality of nozzle assemblies evenly distributed along the axial direction. The nozzle assembly includes a plurality of nozzles evenly distributed along the radial direction, and the nozzles are inclined toward one side of the inner permanent magnet 9.

[0042] The drainage pipe 17 is integrated inside the pump casing 6 or fixed to the outside of the pump casing 6.

[0043] The magnetic particle flushing structure 15 on the inner magnet surface is used to remove particles adsorbed on the surface of the inner permanent magnet 9. The flushing power of the magnetic particle flushing structure 15 comes from the high-pressure fluid at the pump outlet. After the fluid is pressurized by the impeller 5, it is discharged from the pump outlet pipe section 18, where the fluid pressure is the highest. A portion of the high-pressure fluid is led to the flushing nozzle 16 through the through-connected drainage pipe 17. In this embodiment, the flushing nozzle 16 is provided with 9 nozzles evenly distributed circumferentially, facing the surface of the inner permanent magnet 9. The high-pressure fluid is ejected at high speed from these nozzles, forming multiple jets that directly and accurately impact and peel off the magnetic particles attached to the surface of the inner permanent magnet 9.

[0044] The magnetic clearing channel 19 is an internal flow channel located inside the pump casing 6. One end of its opening is located in the gap between the inner rotor 7 and the pump casing 6, and the other end of its opening is located in the low-pressure area at the inlet of the impeller 5.

[0045] Specifically, the other end of the magnetic clearing channel 19 opens towards the central axis of the impeller 5.

[0046] The cleaning channel 19 is used to discharge detached particles. The discharge power of the cleaning channel 19 comes from the negative pressure of the fluid at the inlet of the impeller 5. The washed-off particles enter the gap between the inner rotor 7 and the pump casing 6 with a small amount of fluid. One end of the cleaning channel 19 is connected to this gap area, and the other end leads to the lowest pressure area near the suction port of the impeller 5. Since the inlet of the impeller 5 is a low-pressure area (negative pressure), a pressure difference is formed with the gap area. Under the action of this pressure difference, the fluid containing particles is automatically drawn through the cleaning channel 19 to the impeller inlet and is transported out of the pump along with the main fluid, thus completing the continuous cleaning and discharge process of particles.

[0047] The second embodiment of this utility model:

[0048] like Figures 1-3 As shown, the purpose of this embodiment is to achieve the removal of magnetic particles from the surface of the internal magnet under the condition of limited internal structural space in the magnetic vortex pump.

[0049] This embodiment provides a magnetic vortex pump structure for cleaning magnetic particles from the surface of an inner magnet, comprising a magnetic vortex pump 1, a magnetic particle flushing structure 15 for the inner magnet surface, and a magnetic cleaning channel 19.

[0050] The magnetic vortex pump 1 includes, in sequence, shaft A2, limit sleeve 3, key A4, impeller 5, pump casing 6, inner rotor 7, clamping ring 8, inner permanent magnet 9, outer permanent magnet 10, outer rotor coupling 11, key B12, shaft B13, and three-phase asynchronous motor 14.

[0051] Shaft A2 and limiting sleeve 3 are fixed by interference fit. Limiting sleeve 3 is connected to impeller 5 by key A4. Inner rotor 7 and shaft A2 are fixed by interference fit by binding ring 8. Inner permanent magnet 9 is installed on the outside of inner rotor 7 along the circumferential direction. Outer permanent magnet 10 is installed in outer rotor coupling 11 along the circumferential direction. Shaft B13 is connected to outer rotor coupling 11 by key B12. After the three-phase asynchronous motor 14 is powered on, it drives shaft B32 to rotate. The rotation of shaft B13 drives outer rotor coupling 11 and outer permanent magnet 10 to rotate. The rotation of outer permanent magnet 10 drives inner permanent magnet 9 and inner rotor 7 to rotate. The rotation of inner rotor 7 drives shaft A2 to rotate and drives impeller 5 to rotate.

[0052] The magnetic particle flushing structure 15 on the inner magnet surface includes a flushing nozzle 16, a drainage pipe 17, and a magnetic vortex pump outlet pipe section 18. The flushing nozzle 16 has nine nozzle assemblies equidistantly distributed on the inner magnet surface and is used to flush away magnetic particles from the inner magnet surface. One end of the drainage pipe 17 is connected to the flushing nozzle 16, and the other end is connected through to the magnetic vortex pump outlet pipe section 18. One end of the magnetic cleaning channel 19 is connected to the gap between the inner rotor 7 and the pump casing 6, and the other end is connected to the lowest point of the impeller 5.

[0053] This embodiment is achieved through the following steps:

[0054] Step 1: When the fluid medium flows through the outlet pipe section of the magnetic vortex pump, it has a high pressure due to the impeller pressurization. This high-pressure medium is introduced into the drainage pipe and sprayed out through the evenly spaced flushing nozzles to effectively clean the magnetic particles on the surface of the inner magnet. The uniform arrangement of the nozzles ensures full coverage of the cleaning range, accurately removing particles attached to the magnet surface and ensuring the stable operation of the magnetic drive system.

[0055] Step 2: One end of the magnetic cleaning channel is connected to the lowest point of the impeller, where the pressure is low, creating a local negative pressure. When magnetic particles on the surface of the inner magnet fall off with the fluid medium and into the pump casing, they can be automatically drawn into the impeller flow channel under the negative pressure and transported out of the pump along with the mainstream medium, achieving continuous and effective discharge of magnetic particles.

[0056] This embodiment utilizes the high-pressure fluid from the outlet of a magnetic vortex pump as the flushing power source, requiring no additional energy. Automatic cleaning of the internal magnet surface is achieved through a drainage pipeline and equidistantly arranged nozzles, improving system energy efficiency and integration. The magnetic cleaning channel is connected to the lowest pressure zone of the impeller, utilizing the natural negative pressure zone near the impeller inlet to create a suction effect, automatically collecting detached magnetic particles and guiding them into the main channel, achieving passive self-cleaning. The pressure gradient of the pump's internal flow field is rationally applied to both the cleaning and slag removal stages, forming a synergistic cleaning mechanism of high-pressure flushing + negative pressure drainage, enhancing the overall anti-magnetic deposition capability.

[0057] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A magnetic vortex pump structure capable of cleaning magnetic particles on the surface of an inner magnet, comprising a magnetic vortex pump (1), wherein the magnetic vortex pump (1) comprises a pump casing (6), an impeller (5) disposed in the pump casing (6), a shaft A (2) driving the impeller (5), an inner rotor (7) connected to the shaft A (2), a plurality of inner permanent magnets (9) mounted on the inner rotor (7), an outer rotor coupling (11) connected to the shaft B (13) on a three-phase asynchronous motor (14), and a plurality of outer permanent magnets (10) mounted in the outer rotor coupling (11) and magnetically coupled to the aforementioned inner permanent magnets (9); Its features are, Also includes: The inner magnet surface magnetic particle flushing structure (15) is used to flush the magnetic particles on the surface of the inner permanent magnet (9), and the magnetic cleaning channel (19) is used to discharge the detached magnetic particles out of the pump cavity. The inner magnet surface magnetic particle flushing structure (15) includes a drainage pipe (17) and a flushing nozzle (16). One end of the drainage pipe (17) is connected to the magnetic vortex pump outlet pipe section (18) on the magnetic vortex pump (1), and the other end is connected to the flushing nozzle (16). The flushing nozzle (16) is located between the inner permanent magnet (9) and the outer permanent magnet (10). The magnetic clearing channel (19) is an internal flow channel located inside the pump casing (6). One end of the channel is located in the gap between the inner rotor (7) and the pump casing (6), and the other end is located in the low-pressure area at the inlet of the impeller (5).

2. The magnetic vortex pump structure for cleaning magnetic particles from the surface of an inner magnet as described in claim 1, characterized in that, The flushing nozzle (16) includes several nozzle assemblies evenly distributed along the axial direction.

3. The magnetic vortex pump structure for cleaning magnetic particles from the surface of an inner magnet as described in claim 2, characterized in that, The nozzle assembly includes a plurality of nozzles evenly distributed along the radial direction, and the nozzles are inclined toward one side of the inner permanent magnet (9).

4. The magnetic vortex pump structure for cleaning magnetic particles from the surface of an inner magnet as described in claim 1, characterized in that, The drainage pipe (17) is integrated inside the pump casing (6) or fixed to the outside of the pump casing (6).

5. The magnetic vortex pump structure for cleaning magnetic particles from the surface of an inner magnet as described in claim 1, characterized in that, The other end of the magnetic clearing channel (19) opens toward the central axis of the impeller (5).

6. The magnetic vortex pump structure for cleaning magnetic particles from the surface of an inner magnet as described in claim 1, characterized in that, The inner rotor (7) is press-fitted with the shaft A (2) of the driving impeller (5) via a clamping ring (8), and the impeller (5) is connected to the shaft A (2) via a key A (4).

7. The magnetic vortex pump structure for cleaning magnetic particles from the surface of an inner magnet as described in claim 6, characterized in that, A limiting sleeve (3) is installed on the shaft A (2). The limiting sleeve (3) is interference-fitted with the shaft A (2) and is used to axially position the impeller (5) or the inner rotor (7).

8. The magnetic vortex pump structure for cleaning magnetic particles from the surface of an inner magnet as described in claim 1, characterized in that, The external rotor coupling (11) is connected to the shaft B (13) on the output end of the three-phase asynchronous motor (14) via key B (12).

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