A rigid double support magnetic pump shielding structure

Abstract

This invention provides a rigid double-supported magnetic pump shielding structure, belonging to the field of pump technology. It solves the technical problems of existing magnetic pumps, such as easy wear due to axial positioning. This rigid double-supported magnetic pump shielding structure includes a shell, a stator shielding sleeve, a stator assembly, a support shaft, a rotor shielding sleeve, a rotor assembly, and a support partition. The two ends of the support shaft are respectively installed in a fixing groove at the bottom of the cavity and in a fixing hole in the support partition via a first rotating component and a second rotating component, forming a rigid double-supported structure that effectively constrains axial displacement. This invention has the advantages of constructing a high-rigidity, low-deformation main shaft frame, directly transmitting the axial thrust of the impeller as a static load to the pump casing, greatly suppressing harmful axial movement, and reducing vibration and noise.

Description

Technical Field

[0001] This invention relates to the field of pump technology, specifically to a rigid double-supported magnetic pump shielding structure. Background Technology

[0002] In the field of shaftless shielded pumps, especially in permanent magnet filling pumps that transport highly toxic and corrosive chemical liquids, the axial stability of the rotor is one of the key challenges to ensure the long-term reliable operation of the equipment. Axial runout not only leads to decreased efficiency and noise, but more seriously, it can cause friction between the rotor and stationary parts such as the pump cover, resulting in seal damage and leakage of hazardous media, causing safety accidents.

[0003] To address this issue, existing technologies, such as the permanent magnet filling pump structure improvement device in CN104791257B, typically employ a scheme that involves constructing an axial thrust bearing system comprised of an inlet thrust ring, an impeller thrust bearing, and a thrust ring on the rear cover. The system is designed to create a mechanical limiting and bearing surface to withstand the axial thrust generated by the impeller during operation and to limit the rotor's axial displacement within a predetermined safety clearance, thereby effectively preventing and restricting harmful axial movement.

[0004] Specifically, during normal operation, hydrodynamics forces the rotor to move towards the pump inlet side, causing the impeller thrust bearing to couple and slide with the inlet thrust ring, forming the primary load-bearing surface. During start-up, shutdown, or special operating conditions, the rotor may move in the opposite direction. In this case, the end face of the rotor bearing couples with the thrust ring on the rear cover, forming an auxiliary load-bearing surface. This bidirectional thrust mechanism theoretically provides reliable axial positioning for the rotor.

[0005] However, this existing technology has a significant and inherent drawback: the axial thrust bearing system is extremely prone to wear. This is because, to balance corrosion resistance and wear resistance, these thrust rings and bearings are typically made of hard ceramic materials such as silicon carbide and alumina. Despite the high hardness of these materials, during pump start-up and shutdown, sudden load changes, or when the liquid contains trace particles, the thrust surfaces are subjected to boundary friction or dry friction, inevitably leading to wear. With accumulated operating time, this wear causes the axial clearance between the thrust components to gradually increase, resulting in a wider range of axial free displacement of the rotor. This not only reduces pump operating efficiency but also makes the previously effectively restricted axial movement increasingly significant, potentially evolving into severe axial impact, compromising the rotor's dynamic stability, and greatly increasing the risk of leakage due to frictional damage and encapsulation failure. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a rigid, double-supported shielding structure for magnetic pumps. The technical problem this invention seeks to solve is how to overcome the wear and tear issues inherent in existing magnetic pumps that rely on the sliding friction of hard material thrust surfaces for axial positioning, thereby improving the pump's long-term reliability, stability, and safety.

[0007] The objective of this invention can be achieved through the following technical solution: A rigid double-supported magnetic pump shielding structure includes a housing, a stator shielding sleeve with a cavity is fixedly disposed inside the housing, a stator assembly is shielded and accommodated inside the stator shielding sleeve, a support shaft is rotatably disposed inside the cavity, a rotor shielding sleeve is fixedly connected to the outside of the support shaft, and a rotor assembly is shielded and accommodated inside the rotor shielding sleeve; a fixing groove is coaxially formed at the bottom of the cavity, a support partition is also fixedly connected inside the housing, the support partition covers the opening side of the cavity and protrudes towards the cavity to form a fixing post, and an axially penetrating fixing hole is provided in the fixing post; one end of the support shaft is rotatably mounted in the fixing groove through a first rotating member, and the other end is rotatably mounted in the fixing hole through a second rotating member, and extends outward through the fixing hole and is fixed to the impeller.

[0008] In this design, one end of the support shaft is rotatably mounted in a fixed groove at the bottom of the cavity via a first rotating component, while the other end is rotatably mounted in a fixed hole in the support partition via a second rotating component. This double-support design effectively constrains the support shaft in the axial direction, directly limiting the axial displacement of the rotor assembly and impeller. The two ends of the support shaft are fixed to form a stable axial support frame. When the impeller is subjected to axial thrust from the fluid, the thrust is transmitted through the support shaft to the second rotating component at the fixed hole. The second rotating component, subjected to axial thrust, is then dispersed and absorbed by the support partition, preventing the support shaft from causing axial movement of the rotor assembly. Unlike traditional solutions that rely on the sliding friction of the thrust ring, this solution significantly restricts axial movement through mechanical fixation, reducing axial clearance during dynamic operation. The support partition covers the cavity opening and is fixedly connected to the outer shell, providing additional structural rigidity and ensuring that the fixed hole and fixed groove are coaxially aligned, ensuring the centering of the support shaft and avoiding axial instability caused by eccentric forces.

[0009] Furthermore, an integral metal plate is embedded inside the supporting partition and the fixing column. This metal plate is integrally formed with the supporting partition and the fixing column through injection molding. This embedded injection molding process enhances the supporting strength of the supporting partition and the fixing column, and also better prevents corrosion of the metal plate.

[0010] Furthermore, the supporting partition is provided with a first through hole extending axially, and the metal plate is provided with a second through hole aligned with the first through hole. The diameter of the second through hole is larger than that of the first through hole, and the first through hole is always in communication with the cavity. The first through hole allows the liquid entering from the inlet of the outer casing to flow freely into the cavity and the fixing groove, thereby cooling the rotor assembly and stator assembly, and providing lubrication and cooling for the first and second rotating components.

[0011] Furthermore, a stepped groove is provided on the side wall of the outer casing, and the outer peripheral ends of the support partition and the stator shield sleeve are embedded in the stepped groove. A first sealing element and a second sealing element are arranged sequentially along the axial direction between the stator shield sleeve, the support partition and the stepped groove.

[0012] Furthermore, the supporting partition has a first convex ring and a second convex ring protruding from both sides along the axial direction. The outer diameter of the first convex ring is the same as the outer diameter of the supporting partition, while the outer diameter of the second convex ring is smaller than that of the supporting partition. The stator shielding sleeve has a third convex ring protruding towards the supporting partition. A first sealing element is provided between the third convex ring and the first convex ring, and a second sealing element is provided between the second convex ring and the stepped groove. The first and third convex rings abut against each other, creating a passage gap between the two end faces of the supporting partition and the stator shielding sleeve, allowing liquid to enter for cooling of the stator assembly. In this design, both the first and second sealing elements are end-face-mounted, rather than relying on an interference fit on the outer circumferential surface, thus providing a small amount of free displacement space for the supporting partition in the axial direction.

[0013] Furthermore, a support sealing gasket is provided between the support partition and the stepped groove, and the support sealing gasket is sleeved on the outer periphery of the second convex ring.

[0014] Furthermore, the support sealing gasket includes an elastic support ring portion and semi-circular sealing portions located on both axial sides of the support ring portion. The semi-circular sealing portions on both sides abut against the support partition and the stepped groove, respectively. The outer circumferential diameter of the support ring portion is less than or equal to the outer circumferential diameter of the support partition.

[0015] This design eliminates the thrust ring located at the pump casing inlet and the thrust bearing at the impeller. This design avoids the sliding friction pair made of hard materials such as ceramics, which is inherent in existing designs. Therefore, it eliminates the core failure mode caused by boundary friction, dry friction, and particulate wear, which leads to increased clearance in the thrust assembly. The core of this design is the construction of a high-rigidity, low-deformation main shaft frame formed by a supporting shaft, a first rotating component, a second rotating component, a fixed groove, a supporting partition, and a fixed hole. It directly and efficiently transmits the axial thrust generated by the impeller during operation to the pump casing as a static load, rather than offsetting it through dynamic friction. Unlike traditional designs that allow the rotor to move freely within the thrust clearance, this design provides strong axial constraint to the rotor system through this rigid frame. Its axial displacement is restricted to the bearing clearance at the micrometer level, thereby greatly suppressing harmful axial movement and ensuring the stability of rotor operation. To ensure the long-term stable operation of the rigid frame, this design introduces a flexible system at its boundary, consisting of a supporting sealing gasket and first and second seals. The rigid main shaft frame is responsible for bearing the main axial force, ensuring core positioning; while the surrounding flexible sealing system is responsible for absorbing thermal deformation and assembly stress, protecting the core frame from additional internal stress. Because axial movement is greatly suppressed, the axial running clearance between the impeller and the housing inlet remains precise and constant, improving operational efficiency.

[0016] Furthermore, the stator shield sleeve has a supporting ring protruding towards the supporting partition, and the outer circumferential surface of the supporting partition abuts against the inner circumferential surface of the supporting ring. This allows for better coaxial positioning of the fixing holes and fixing grooves of the supporting partition.

[0017] Furthermore, the stator shielding sleeve includes an inner shielding sleeve and an outer shielding sleeve. The inner shielding sleeve has a axial support column protruding from the side facing away from the cavity opening. The fixing groove is opened in the axial support column, and its bottom wall has a closed structure.

[0018] Furthermore, the supporting protruding ring is integrally formed with the inner shielding sleeve, the outer shielding sleeve and the supporting protruding ring are fixedly connected by a first fixing member, and the outer shell is fixedly connected to both the inner shielding sleeve and the outer shielding sleeve by a second fixing member.

[0019] Compared with existing technologies, the technical advantages of this invention are as follows: It constructs a high-rigidity, low-deformation main shaft frame composed of a supporting shaft, a first rotating component, a second rotating component, a fixed groove, a supporting partition, and fixed holes. The axial thrust of the impeller is directly transmitted to the pump casing as a static load, rather than being offset by dynamic friction. This creates a strong axial constraint on the rotor system, limiting axial displacement to within micrometer-level bearing clearances and significantly suppressing harmful axial movement. This significantly reduces vibration and noise, avoids the risk of impact between the rotor and stationary components, and ensures extremely smooth operation. A flexible boundary system composed of a supporting gasket, a first seal, and a second seal is introduced, working in conjunction with the rigid main shaft frame. The rigid frame bears the main axial force, ensuring core positioning; the flexible system absorbs thermal deformation and assembly stress, releases internal stress, and protects the core frame. This design ensures structural robustness while providing necessary compliance, improving the system's adaptability to different operating conditions and long-term reliability. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention.

[0021] Figure 2 This is an enlarged view of point A in the present invention.

[0022] Figure 3 This is a perspective view of the supporting sealing gasket of the present invention.

[0023] Figure 4 This is a partial cross-sectional view of the present invention.

[0024] Figure 5 This is a perspective view of the present invention.

[0025] Figure number markings: 1. Outer shell; 10. Inlet; 11. Stepped groove; 12. First fixing member; 13. Second fixing member; 2. Stator shielding sleeve; 21. Cavity; 211. Fixing groove; 22. Third convex ring; 23. Supporting convex ring; 24. Inner shielding sleeve; 241. Shaft support column; 25. Outer shielding sleeve; 3. Stator assembly; 4. Supporting shaft; 5. Rotor shielding sleeve; 6. Rotor assembly; 7. Supporting partition; 71. Fixing column; 72. Fixing hole; 73. Metal plate; 731. Second through hole; 74. First through hole; 75. First convex ring; 76. Second convex ring; 9. Impeller; 81. First rotating member; 82. Second rotating member; 101. First seal; 102. Second seal; 103. Supporting sealing gasket; 1031. Supporting circular ring; 1032. Semi-circular sealing part. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0027] It should be noted that the descriptions of directions such as "upper", "lower", "left", "right", "top", and "bottom" in this invention are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] according to Figures 1 to 5 As shown, a rigid double-supported magnetic pump shielding structure includes a housing 1. The housing 1 consists of a motor housing and a pump housing. The motor housing houses the motor, frequency converter, etc., while the pump housing houses the impeller 9. The pump housing has an inlet 10 and an outlet, with the impeller 9 axially opposite to the inlet 10. The motor includes a rotor assembly 6 and a stator assembly 3. A stator shielding sleeve 2 with a cavity 21 is fixedly installed inside the housing 1. The stator assembly 3 is internally shielded and accommodated within the stator shielding sleeve 2. A support shaft 4 is rotatably mounted within the cavity 21. A rotor shielding sleeve 5 is fixedly connected to the outside of the support shaft 4, and the rotor assembly 6 is internally shielded and accommodated within the rotor shielding sleeve 5. Rotation of the rotor assembly 6 drives the support shaft 4 to rotate.

[0029] A fixing groove 211 is coaxially formed at the bottom of the cavity 21. A support partition 7 is also fixedly connected inside the outer casing 1. The support partition 7 covers the opening side of the cavity 21 and protrudes towards the cavity 21 to form a fixing post 71. An axially penetrating fixing hole 72 is provided in the fixing post 71. One end of the support shaft 4 is rotatably mounted in the fixing groove 211 through a first rotating member 81, such as a sliding bearing or a rolling bearing, and the other end is rotatably mounted in the fixing hole 72 through a second rotating member 82, such as a sliding bearing or a rolling bearing. After the support shaft 4 passes out of the fixing hole 72, it is fixed to the impeller 9.

[0030] The core of this embodiment lies in the fact that both ends of the supporting shaft 4 are supported and constrained by the fixing groove 211 and the fixing hole 72 on the supporting partition 7 via the first rotating component 81 and the second rotating component 82, respectively. This forms a high-rigidity double-support bridge-type main shaft frame. When the impeller 9 is subjected to axial thrust from the fluid, this thrust is directly transmitted to the supporting partition 7 and the outer casing 1 through the supporting shaft 4 and is absorbed as a static load, rather than relying on the sliding friction between the traditional thrust rings to offset it. Therefore, the wear problem of hard material friction pairs is avoided at the source. The axial displacement of the supporting shaft 4 is strictly limited within the small axial clearance of the two rotating components themselves, thereby greatly suppressing the axial movement of the rotor assembly 6 and the impeller 9, ensuring the stability and reliability of operation. The supporting partition 7 not only provides a support point, but its design covering the opening of the cavity 21 also enhances the rigidity of the overall structure and helps to ensure the coaxiality of the fixing hole 72 and the fixing groove 211, avoiding uneven wear.

[0031] To further enhance the strength and deformation resistance of the support partition 7, especially the area of ​​the fixed column 71, and to more stably withstand axial thrust, an integral metal plate 73 is embedded inside the support partition 7 and the fixed column 71. The metal plate 73 is integrally formed with the support partition 7 and the fixed column 71 through injection molding. This metal plate 73 is typically made of high-strength materials such as stainless steel. The injection molding process ensures that the metal plate 73 is firmly bonded to the main body of the support partition 7, which is composed of external plastic or composite materials, thus enhancing the overall strength and protecting the metal plate 73 from media corrosion through the outer layer material. Simultaneously, to achieve cooling and lubrication of the rotor assembly 6, stator assembly 3, and the first rotating component 81 and the second rotating component 82 within the cavity 21, the support partition 7 is provided with a first through hole 74 that extends axially. The metal plate 73 is provided with a second through hole 731 aligned with the first through hole 74. The diameter of the second through hole 731 is larger than the diameter of the first through hole 74. A small amount of liquid pumped by the pump can continuously enter the cavity 21 through the first through hole 74, forming a circulation that serves to cool and lubricate. Furthermore, the incoming fluid does not directly impact the rotor assembly 6, but instead applies axial force to the support partition 7, significantly improving the axial stability of the rotor assembly 6.

[0032] To ensure reliable fixation and sealing of the support partition 7 and the stator shielding sleeve 2 within the housing 1, a stepped groove 11 is provided on the side wall of the housing 1. The outer peripheral ends of the support partition 7 and the stator shielding sleeve 2 are sequentially embedded into the stepped groove 11.

[0033] Specifically, the support partition 7 has a first protruding ring portion 75 and a second protruding ring portion 76 protruding from both sides along the axial direction. The outer diameter of the first protruding ring portion 75 is the same as the outer diameter of the support partition 7, and the outer diameter of the second protruding ring portion 76 is smaller than the outer diameter of the support partition 7. The stator shield sleeve 2 has a third protruding ring portion 22 protruding towards the support partition 7. During assembly, a first sealing element 101 is provided between the end faces of the third protruding ring portion 22 and the first protruding ring portion 75. A second sealing element 102 is provided between the end face of the second protruding ring portion 76 and the corresponding step surface of the stepped groove 11.

[0034] This end-face sealing design, rather than an interference seal on the outer periphery, is crucial. It provides a small amount of free displacement space for the support diaphragm 7 in the axial direction, which can compensate for internal dimensional changes caused by temperature variations or assembly stresses, avoiding excessive internal stress within the rigid frame and thus protecting the core support structure from damage. Simultaneously, the passage gap between the end faces of the first and third convex rings 75 and 22 after they abut each other allows some liquid to flow through, providing cooling for the stator assembly 3.

[0035] To further optimize the connection between the support partition 7 and the outer shell 1 and to assist in stress absorption, the diameter of the outer peripheral surface of the second convex ring 76 is smaller than the diameter of the outer peripheral surface of the support partition 7. A support sealing gasket 103 is provided between the support partition 7 and the stepped groove 11. The support sealing gasket 103 is located on the outer periphery of the second convex ring 76 and is also fixed by the support partition 7 and the stepped groove 11. The support sealing gasket 103 is specifically positioned by fitting around the outer periphery of the second convex ring 76.

[0036] Preferably, the support sealing gasket 103 includes an elastic support ring portion 1031 and semi-circular sealing portions 1032 located on both axial sides of the support ring portion 1031. The semi-circular sealing portions 1032 on both sides abut against the bottom surfaces of the support partition 7 and the stepped groove 11, respectively. The outer circumferential diameter of the support ring portion 1031 is less than or equal to the outer circumferential diameter of the support partition 7 to avoid interference with the outer casing 1.

[0037] The support sealing gasket 103 provides additional sealing function, and its elastic properties can further absorb vibration and deformation. Together with the first seal 101 and the second seal 102, it forms a flexible boundary system around the rigid main shaft frame, achieving a combination of rigidity and flexibility.

[0038] To ensure precise alignment between the fixing holes 72 on the support partition 7 and the fixing grooves 211 on the stator shielding sleeve 2, the stator shielding sleeve 2 has a supporting protruding ring 23 protruding towards the support partition 7. During assembly, the outer circumferential surface of the support partition 7 abuts against or maintains a minimal clearance fit with the inner circumferential surface of the supporting protruding ring 23, thereby achieving radial positioning and ensuring the coaxiality of the fixing holes 72 and the fixing grooves 211.

[0039] Furthermore, the stator shielding sleeve 2 can adopt a split structure, including an inner shielding sleeve 24 and an outer shielding sleeve 25. The inner shielding sleeve 24 has a shaft support column 241 protruding from the side facing away from the opening of the cavity 21. The fixing groove 211 is opened in the shaft support column 241, and its bottom wall has a closed structure, which helps to form a stable bearing seat.

[0040] Furthermore, the supporting protruding ring 23 can be integrally formed with the inner shielding sleeve 24 to enhance strength. The outer shielding sleeve 25 and the supporting protruding ring 23 are fixedly connected by the first fastener 12. The outer shell 1 is fixedly connected to both the inner shielding sleeve 24 and the outer shielding sleeve 25 by the second fastener 13, forming a stable whole.

[0041] This invention constructs a high-rigidity main shaft frame by supporting the rotating shaft 4 and its two ends, including the first rotating component 81 and the second rotating component 82, along with the fixed groove 211, the supporting partition 7, and the fixed hole 72. This frame directly transmits the axial thrust of the impeller 9 to the outer casing 1 and the supporting partition 7, achieving strong axial constraint on the rotor system and limiting axial displacement to a very small bearing clearance, fundamentally avoiding the wear problem of traditional sliding friction thrust pairs. Simultaneously, the flexible boundary system composed of the supporting sealing gasket 103, the first sealing component 101, and the second sealing component 102 can absorb thermal deformation and assembly stress, release internal stress, and protect the core rigid frame from impact. This combination of rigidity and flexibility ensures the axial stability, reliability, and safety of the magnetic pump during long-term operation.

[0042] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection defined by the claims of the present invention.

Claims

1. A rigid double-supported magnetic pump shielding structure, comprising a shell (1), a stator shielding sleeve (2) with a concave cavity (21) is fixedly arranged in the shell (1), and a stator assembly (3) is shielded and accommodated in the stator shielding sleeve (2), characterized in that: The concave cavity (21) is rotatably provided with a support rotating shaft (4), the outer part of the support rotating shaft (4) is fixedly connected with a rotor shield sleeve (5), the inner part of the rotor shield sleeve (5) shields and contains a rotor assembly (6); the bottom of the concave cavity (21) is coaxially formed with a fixed groove (211), the shell (1) is further fixedly connected with a support partition plate (7), the support partition plate (7) covers the opening side of the concave cavity (21) and is formed with a fixed column (71) which protrudes towards the concave cavity (21), the fixed column (71) is provided with a fixed hole (72) which is axially penetrated; one end of the support rotating shaft (4) is rotatably installed in the fixed groove (211) through a first rotating piece (81), the other end is rotatably installed in the fixed hole (72) through a second rotating piece (82) and is fixed with an impeller (9) after penetrating out of the fixed hole (72); The support partition plate (7) and the fixed column (71) are embedded with an integral metal plate (73), the metal plate (73) is integrally formed with the support partition plate (7) and the fixed column (71) through an injection molding process; The side wall of the shell (1) is provided with a stepped groove (11), the outer circumferential end of the support partition plate (7) and the stator shield sleeve (2) is embedded in the stepped groove (11), the stator shield sleeve (2), the support partition plate (7) and the stepped groove (11) are sequentially provided with a first sealing piece (101) and a second sealing piece (102) along the axial direction; The support partition plate (7) is protruded with a first convex ring part (75) and a second convex ring part (76) on both sides along the axial direction respectively; The support partition plate (7) and the stepped groove (11) are provided with a support sealing gasket (103), the support sealing gasket (103) is sleeved on the outer periphery of the second convex ring part (76); The stator shield sleeve (2) is protruded with a support convex ring part (23) towards the support partition plate (7), the outer circumferential surface of the support partition plate (7) abuts against the inner circumferential surface of the support convex ring part (23).

2. A rigid double supported magnetic pump screen structure according to claim 1, characterized in that: The support partition plate (7) is provided with a first through hole (74) which is axially penetrated, the metal plate (73) is provided with a second through hole (731) which is aligned with the first through hole (74), the hole diameter of the second through hole (731) is larger than the hole diameter of the first through hole (74), the first through hole (74) is always communicated with the concave cavity (21).

3. A rigid double supported magnetic pump shield structure according to claim 1, characterized in that: The outer periphery diameter of the first convex ring part (75) is consistent with the outer periphery diameter of the support partition plate (7), the outer periphery diameter of the second convex ring part (76) is smaller than the outer periphery diameter of the support partition plate (7), the stator shield sleeve (2) is protruded with a third convex ring part (22) towards the support partition plate (7), the first sealing piece (101) is arranged between the third convex ring part (22) and the first convex ring part (75), the second sealing piece (102) is arranged between the second convex ring part (76) and the stepped groove (11).

4. A rigid double supported magnetic pump shield structure according to claim 1, characterized in that: The support sealing gasket (103) comprises an elastic support ring part (1031) and semicircular sealing parts (1032) on both axial sides of the support ring part (1031), the semicircular sealing parts (1032) on both sides abut against the support partition plate (7) and the stepped groove (11) respectively, and the outer peripheral diameter of the support ring part (1031) is less than or equal to the outer peripheral diameter of the support partition plate (7).

5. A rigid double supported magnetic pump shield structure according to claim 1, characterized in that: The stator shielding sleeve (2) comprises an inner shielding sleeve (24) and an outer shielding sleeve (25), the inner shielding sleeve (24) is provided with an axial support column (241) on the side away from the opening of the cavity (21), and the fixing groove (211) is arranged in the axial support column (241), and the bottom wall of the fixing groove (211) is in a closed structure.

6. A rigid double supported magnetic pump screen structure according to claim 5, characterized in that: The support convex ring part (23) is integrally formed with the inner shielding sleeve (24), the outer shielding sleeve (25) and the support convex ring part (23) are fixedly connected through the first fixing part (12), and the shell (1) is fixedly connected with the inner shielding sleeve (24) and the outer shielding sleeve (25) through the second fixing part (13).

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