Magnetic drive pump

Abstract

The utility model provides a magnetic drive pump, and belongs to the technical field of water pumps. The magnetic drive pump solves the technical problems of sealing, heat dissipation and the like of an existing magnetic drive pump. The magnetic drive pump comprises a pump assembly and a permanent magnet motor, the pump assembly comprises a pump shell and an impeller, the permanent magnet motor comprises a first machine shell and a second machine shell which are detachably connected, the first machine shell and the pump shell are detachably and fixedly connected, and a separation plate and a stator part are integrally formed in the first machine shell; the partition plate and the stator portion divide the interior among the pump shell, the first machine shell and the second machine shell into a first installation cavity and a second installation cavity which are not communicated with each other, a stator assembly is wrapped in the stator portion in an injection molding mode, a rotor assembly integrally formed in an injection molding mode is arranged in the first installation cavity, and the rotor assembly is rotatably arranged on the periphery of the stator portion in a sleeving mode. The LED lamp is better in sealing and heat dissipation effects.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pumps, in particular to a magnetic pump. Background Art

[0002] A magnetic pump is a type of pump that uses a permanent magnet motor to drive the pump's impeller. The working principle of a permanent magnet motor is that it is an electric motor that uses permanent magnets to establish an excitation magnetic field. A permanent magnet motor is usually composed of components such as a stator, a rotor, and an end cover. The stator is basically the same as an ordinary induction motor, and the rotor structure usually uses a combination of permanent magnets and an iron core. Permanent magnet motors have the advantages of small size, light weight, simple structure, high efficiency, and high power factor. They are widely used in various fields, such as household appliances, industrial equipment, electric vehicles, etc.

[0003] In the existing magnetic pump, the motor and the pump are two independent components. The magnetic pump of this structure is large in size and heavy in weight. There is also an electric pump disclosed in the Chinese Patent Library (application number: 2014105380967), which integrates the two independent components of the electric pump base and the front cover into one. The impeller is driven to rotate by the rotating shaft, and the fluid is sucked from the water inlet of the pump body, and the energy is obtained by the impeller acceleration and thrown out from the water outlet of the pump body. In this process, the cavity M surrounded by the pump body and the front cover is filled with high-speed circulating fluid, and the cooling groove is also filled with flowing fluid. The heat generated by the motor when working is conducted to the fluid in the cavity M through heat transfer, and then taken out of the pump by the circulating fluid to achieve the cooling purpose. However, the front cover and the sealing ring separate the cavity M into an area where the fluid can enter and an area where the fluid cannot enter, wherein the motor is installed in the area where water cannot enter, that is, on the convex ring protruding from the front cover to the rear cover, and the outer rotor and inner rotor of the motor cannot completely contact the fluid to dissipate heat. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a magnetic pump. The technical problem to be solved by the utility model is: how to make the sealing and heat dissipation effects of the magnetic pump better.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a magnetic pump, including a pump assembly and a permanent magnet motor, the pump assembly including a pump casing with a water inlet and a water outlet and an impeller arranged in the pump casing, the permanent magnet motor including a casing one and a casing two that are detachably fixedly connected, the casing one and the pump casing are detachably fixedly connected, an isolation plate and a circular stator part protruding outwardly in the middle of the isolation plate are integrally formed in the casing one, the isolation plate and the stator part separate the interior between the pump casing, the casing one and the casing two into an installation cavity one and an installation cavity two that are not connected to each other, the stator part is injection-molded with a stator assembly, the installation cavity one is provided with an injection-molded rotor assembly, the rotor assembly is rotatably sleeved on the outer periphery of the stator part, a central axis is passed through the middle of the rotor assembly, an impeller is fixedly connected to the rotor assembly, and a control device is installed in the installation cavity two.

[0006] The permanent magnet motor drives the impeller to rotate, sucking liquid in from the water inlet and discharging it from the water outlet. The casing of the permanent magnet motor of this scheme is injection molded, and the stator assembly is injection-molded and sealed. The stator assembly and the plastic are injection-molded into a stator part. The isolation plate and the stator part separate the interior between the pump casing, casing one and casing two into an installation cavity one and an installation cavity two that are not connected to each other. The stator part is located in the installation cavity one, and an injection-molded rotor assembly is arranged in the installation cavity one. The rotor assembly is rotatably mounted on the outer periphery of the stator part. Therefore, the liquid coming in from the water inlet will fill the entire installation cavity one, that is, the rotor assembly and the stator part are both immersed in the liquid. When the magnetic pump is working, the flow of the liquid can take away the heat of the rotor assembly and the stator assembly in the stator part, thereby effectively improving the working efficiency and service life of the magnetic pump. The installation chamber 1 and the installation chamber 2 are two completely independent chambers. The liquid in the installation chamber 1 will not enter the installation chamber 2. The sealing effect in the installation chamber is good. There is a control device in the installation chamber 2. The control device is used to control the operation of the magnetic pump. It is mainly used to adjust the operation parameters such as the start and stop of the water pump, water flow, and water pressure, thereby achieving energy saving, extending the life of the magnetic pump, and improving work efficiency. The control device can be connected to the stator assembly through the wiring hole that can be opened on the isolation plate relative to the stator assembly.

[0007] Furthermore, the rotor assembly includes a rotary drum part 1 sleeved outside the stator part and a rotary drum part 2 embedded in the stator part, and one end of the rotary drum part 1 and the rotary drum part 2 are connected by a connecting part, and a plurality of water holes are provided on the connecting part. The liquid fills the entire installation cavity 1, and the gap between the rotor assembly and the stator part is also filled with liquid, but the gap between the rotor assembly and the stator part is relatively narrow, and the liquid that can cool the stator part is relatively small. After a plurality of water holes are provided on the connecting part, the fluidity of the liquid between the rotor assembly and the stator part can be increased, and the heat emitted by the stator assembly can be better taken away, thereby improving work efficiency.

[0008] Furthermore, a guide vane is integrally formed in the pump casing, and a mounting hole 1 is opened on the lower end surface of the guide vane. A mounting hole 2 is opened in the middle of the stator part and is opposite to the mounting hole 1. The rotating cylinder part 2 is located between the mounting hole 1 and the mounting hole 2. The central axis passes through the rotating cylinder part 2 and the two ends are respectively embedded in the mounting hole 1 and the mounting hole 2 for keyway fixation. A bearing 1 is arranged between the rotating cylinder part 2 and the central axis.

[0009] The central axis of this scheme only plays the role of supporting the rotor assembly, that is to say, the central axis here does not rotate relative to the casing. The impeller is fixedly connected to the rotor assembly, and the rotor assembly directly drives the impeller to rotate. The rotating part of the central axis is reduced during rotation, thereby reducing some kinetic energy loss, thereby improving the working efficiency of the magnetic pump.

[0010] Furthermore, a key block 1 protrudes inwardly from the first mounting hole, a fixing groove 1 that cooperates with the first key block is provided on the central shaft, a key block 2 protrudes inwardly from the second mounting hole, a fixing groove 2 that cooperates with the second key block is provided on the central shaft, and the key block 1 and the fixing groove 1, as well as the key block 2 and the fixing groove 2 cooperate to limit the circumferential movement of the central shaft. The central shaft is limited in circumferential, axial and radial movement by the first mounting hole, the second mounting hole, the first key block and the fixing groove 1, as well as the key block 2 and the fixing groove 2, and can more stably support the rotation of the rotor assembly.

[0011] Furthermore, the connecting part has a cylindrical fixing part coaxial with the second rotating cylinder part protruding in the opposite direction of the second rotating cylinder part, and a plurality of large strip blocks and small strip blocks protruding outward from the outer circumference of the cylindrical fixing part, and a plurality of fan-shaped fixing blocks protruding downward on the side of the impeller close to the rotor assembly, and a fixing groove is provided in the middle of the fan-shaped fixing block, and the fixing groove is fixed with the small strip block, and a fixing through groove is provided between two adjacent fan-shaped fixing blocks, and the fixing through groove is fixed with the large strip block. The impeller can be better fixed to the rotor assembly to ensure that the impeller can rotate better when the rotor assembly rotates.

[0012] Furthermore, the cylindrical fixing part and the second rotating cylinder part have the same mounting through hole for passing the central axis, the outer end of the cylindrical fixing part protrudes a positioning convex ring inward, the central axis abuts against the positioning convex ring, and a sleeve is arranged between the bearing one and the stator part.

[0013] Furthermore, a guide vane is integrally formed in the pump housing, and a mounting hole 1 is provided on the lower end surface of the guide vane. A mounting hole 2 is provided in the middle of the stator part, and the opening is opposite to the mounting hole 1. The second rotating cylinder part is located between the first and second mounting holes. A bearing 2 is provided in the first mounting hole, and a bearing 3 is provided in the second mounting hole. The central shaft is fixedly connected to the second rotating cylinder part by injection molding, and the two ends of the central shaft are respectively fixedly rotated by the bearing 2 and the bearing 3. This is another installation structure of the rotor assembly and the central shaft. The central shaft of this scheme is integrally formed with the rotor assembly by injection molding, and the central shaft and the rotor assembly rotate together.

[0014] Furthermore, the guide vane includes a plurality of blades and a cylindrical hub connecting the blades, the first mounting hole is located at the lower end of the cylindrical hub, the impeller includes an upper ring plate and a lower ring plate, the inner hole of the upper ring plate is larger than the inner hole of the lower ring plate, the cylindrical hub and the lower part of the blade pass through the inner hole of the upper ring plate until they are close to the lower ring plate, and the cylindrical hub and the blade do not contact the impeller. The distance between the first mounting hole and the second mounting hole is shortened, the length of the central axis is further shortened, the stability of the central axis is increased, the central axis is less shaken when the rotor assembly rotates around the central axis, the efficiency of the whole machine is improved, and the axial length of the pump is reduced.

[0015] Furthermore, a matching block and a slot are provided at the connection between casing one and casing two, a mounting boss one protrudes from casing one in the direction of casing two, and a mounting boss two protrudes from casing two in the direction of casing one, and mounting boss one and mounting boss two are fixed by fixing member one.

[0016] Furthermore, a seal and a sealing groove are provided at the connection between the casing one and the pump casing, and the casing one and the pump casing are fixed by a fixing member two.

[0017] Compared with the prior art, the technical effects of the utility model are as follows: 1. The liquid can fill the entire installation cavity 1, and the rotor assembly and the stator part are both immersed in the liquid. When the magnetic pump is working, the flow of the liquid can take away the heat of the rotor assembly and the stator assembly in the stator part, thereby effectively improving the working efficiency and service life of the magnetic pump. 2. The gap and water hole between the rotor assembly and the stator part can form a liquid flow channel to enhance the fluidity of the liquid, which can better take away the heat emitted by the stator assembly and improve the working efficiency. 3. The impeller is fixed to the rotor assembly to ensure that when the rotor assembly rotates, the impeller can rotate better. 4. The central axis, a rotating component, is reduced during rotation, thereby reducing some kinetic energy losses, thereby improving the working efficiency of the magnetic pump. 5. The detachable and fixedly connected casing 1 and casing 2 improve the sealing of the entire machine and are more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the utility model.

[0019] Figure 2 It is an AA enlarged view of the utility model.

[0020] Figure 3 It is a cross-sectional view of a casing and a stator assembly of the utility model.

[0021] Figure 4 The utility model is a three-dimensional diagram of an impeller.

[0022] Figure 5 It is a stereoscopic diagram of the rotor assembly of the utility model.

[0023] Figure 6It is a cross-sectional view of embodiment 2 of the present utility model.

[0024] Explanation of the figure numbers: 1. Pump casing; 101. Water outlet; 102. Water inlet; 2. Impeller; 21. Fan-shaped fixing block; 211. Fixing groove; 212. Fixing through groove; 22. Upper ring plate; 23. Lower ring plate; 3. Casing 1; 31. Isolation plate; 311. Wiring hole; 32. Stator; 321. Mounting hole 2; 322. Key block 2; 301. Slot; 302. Mounting boss 1; 4. Casing 2; 401. Block; 402. Mounting boss 2; 5. Mounting cavity 1; 6. Mounting cavity 2; 7. Stator assembly; 8. Rotor assembly ;81. Rotating drum part one;82. Rotating drum part two;83. Connecting part;831. Water hole;84. Cylinder fixing part;841. Large strip block;842. Small strip block;843. Positioning convex ring;9. Center axis;91. Fixing groove one;92. Fixing groove two;10. Bearing one;11. Guide vane;111. Mounting hole one;112. Key block one;113. Blade;114. Cylindrical hub;12. Bushing;13. Bearing two;14. Bearing three;15. Fixing part one;16. Seal;17. Seal groove;18. Fixing part two. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] according to Figures 1 to 5 As shown, a magnetic pump includes a pump assembly and a permanent magnet motor. The pump assembly includes a pump housing 1 with a water outlet 101 and a water inlet 102 and an impeller 2 arranged in the pump housing 1. The permanent magnet motor drives the impeller 2 to rotate, sucking liquid in from the water inlet 102 and discharging it from the water outlet 101.

[0027] The permanent magnet motor includes a housing 1 3 and a housing 2 4 which are detachably fixedly connected. The housing 1 3 and the housing 2 4 of the permanent magnet motor are independently injection molded. An isolation plate 31 and a circular stator portion 32 protruding outward from the middle of the isolation plate 31 are integrally formed in the housing 1 3. The stator portion 32 injection-molds and seals the stator assembly 7. The isolation plate 31 and the stator portion 32 separate the interior between the pump housing 1, the housing 1 3 and the housing 2 4 into an installation cavity 1 5 and an installation cavity 2 6 which are not connected to each other. An injection-molded rotor assembly 8 is arranged in the installation cavity 1 5. The rotor assembly 8 is rotatably sleeved on the outer periphery of the stator portion 32. A central shaft 9 is passed through the middle of the rotor assembly 8. The impeller 2 is fixedly connected to the rotor assembly 8. The liquid coming in from the water inlet 102 will fill the entire installation chamber 1 5, that is to say, the rotor assembly 8 and the stator part 32 are immersed in the liquid. When the magnetic pump is working, the flow of the liquid can take away the heat of the rotor assembly 8 and the stator assembly 7 in the stator part 32, thereby effectively improving the working efficiency and service life of the magnetic pump. A control device is installed in the installation chamber 2 6. The installation chamber 1 5 and the installation chamber 2 6 are two completely independent cavities. The liquid in the installation chamber 1 5 will not enter the installation chamber 2 6. The sealing effect in the installation chamber is good. The control device is used to control the operation of the magnetic pump. It is mainly used to adjust the operating parameters such as the start and stop of the water pump, the water flow rate, and the water pressure, thereby achieving energy saving, extending the life of the magnetic pump, and improving the working efficiency. The control device can be connected to the stator assembly 7 through the wiring hole 311 that can be opened on the isolation plate 31 relative to the position of the stator assembly 7. The wiring hole 311 does not affect the sealing of the installation chamber 1 5 and the installation chamber 2 6.

[0028] The rotor assembly 8 includes a first rotating cylinder portion 81 sleeved outside the stator portion 32 and a second rotating cylinder portion 82 embedded in the stator portion 32. One end of the first rotating cylinder portion 81 and the second rotating cylinder portion 82 are connected by a connecting portion 83, and a plurality of water holes 831 are provided on the connecting portion 83. The liquid fills the entire installation cavity 5, and the gap between the rotor assembly 8 and the stator portion 32 is also filled with liquid. After the plurality of water holes 831 are provided on the connecting portion 83, the fluidity of the liquid between the rotor assembly 8 and the stator portion 32 can be increased, and the heat emitted by the stator assembly 7 can be better taken away, thereby improving the working efficiency.

[0029] The pump housing 1 is integrally formed with a guide vane 11, and a mounting hole 111 is provided on the lower end surface of the guide vane 11. The stator part 32 has a mounting hole 321 in the middle, which is opposite to the mounting hole 111. The second rotating cylinder part 82 is located between the mounting hole 111 and the second mounting hole 321. The central shaft 9 passes through the second rotating cylinder part 82, and both ends are respectively embedded in the mounting hole 111 and the mounting hole 321 for keyway fixation. A bearing 10 is provided between the second rotating cylinder part 82 and the central shaft 9. The keyway fixing method is preferably that the mounting hole 111 protrudes inwardly with a key block 112, the central shaft 9 has a fixing groove 191 that matches the key block 112, the mounting hole 321 protrudes inwardly with a key block 2322, the central shaft 9 has a fixing groove 292 that matches the key block 2322, and the key block 112 and the fixing groove 191, as well as the key block 2322 and the fixing groove 292 cooperate to limit the circumferential movement of the central shaft 9. The central shaft 9 is limited in circumferential, axial and radial movement by the mounting hole 1 111, the mounting hole 2 321, the key block 1 112, the fixing groove 1 91, the key block 2 322 and the fixing groove 2 92, so as to more stably support the rotation of the rotor assembly 8. The central shaft 9 mentioned above only supports the rotor assembly 8, that is, the central shaft 9 here does not rotate relative to the housing, and the impeller 2 is fixedly connected to the rotor assembly 8, and the rotor assembly 8 directly drives the impeller 2 to rotate, which reduces the rotating part of the central shaft 9 during rotation, thereby reducing some kinetic energy losses, thereby improving the working efficiency of the magnetic pump.

[0030] The rotor assembly 8 is fixedly connected to the impeller 2 in such a way that the connecting portion 83 protrudes a cylindrical fixing portion 84 coaxial with the rotating cylinder portion 82 in the opposite direction of the rotating cylinder portion 82, and the outer circumference of the cylindrical fixing portion 84 protrudes outward with a plurality of large strip blocks 841 and small strip blocks 842, and the impeller 2 protrudes downward on the side close to the rotor assembly 8 with a plurality of fan-shaped fixing blocks 21, and the fan-shaped fixing blocks 21 have a fixing groove 211 in the middle, and the fixing groove 211 is fixed with the small strip block 842, and a fixing through groove 212 is provided between two adjacent fan-shaped fixing blocks 21, and the fixing through groove 212 is fixed with the large strip block 841. The impeller 2 can be better fixed to the rotor assembly 8, and it can be ensured that when the rotor assembly 8 rotates, the impeller 2 can rotate better.

[0031] The cylindrical fixing part 84 and the rotating cylinder part 2 82 have the same mounting through hole for passing the central shaft 9. The outer end of the cylindrical fixing part 84 protrudes inwardly with a positioning convex ring 843, and the central shaft 9 abuts against the positioning convex ring 843. A shaft sleeve 12 is arranged between the bearing 10 and the stator part 32.

[0032] The guide vane 11 includes a plurality of blades 113 and a cylindrical hub 114 connecting the blades 113. The first mounting hole 111 is located at the lower end of the cylindrical hub 114. The impeller 2 includes an upper ring plate 22 and a lower ring plate 23. The inner hole of the upper ring plate 22 is larger than the inner hole of the lower ring plate 23. The lower part of the cylindrical hub 114 and the blades 113 pass through the inner hole of the upper ring plate 22 until they are close to the lower ring plate 23. The cylindrical hub 114 and the blades 113 are not in contact with the impeller 2. The distance between the first mounting hole 111 and the second mounting hole 321 is shortened, the length of the central axis 9 is further shortened, the stability of the central axis 9 is increased, the central axis 9 is reduced from shaking when the rotor assembly 8 rotates around the central axis 9, the efficiency of the whole machine is improved, and the axial length of the pump is reduced.

[0033] The preferred way of detachably connecting the casing 1 3 and the casing 2 4 is that a matching card block 401 and a card slot 301 are provided at the connection between the casing 1 3 and the casing 2 4, a mounting boss 1 302 protrudes from the inside of the casing 1 3 toward the casing 2 4, and a mounting boss 2 402 protrudes from the inside of the casing 2 4 toward the casing 1 3, and the mounting boss 1 302 and the mounting boss 2 402 are fixed by a fixing part 15.

[0034] The preferred method for the detachable fixed connection between the casing 1 3 and the pump casing 1 is that a sealing member 16 and a sealing groove 17 are provided at the connection between the casing 1 3 and the pump casing 1 , and the casing 1 3 and the pump casing 1 are fixed by a fixing member 2 18 .

[0035] according to Figure 6 As shown, different from the installation method of the central shaft 9 described above, in this embodiment, a guide vane 11 is integrally formed in the pump housing 1, and a mounting hole 111 is provided on the lower end surface of the guide vane 11. A mounting hole 321 is provided in the middle of the stator part 32, and the opening is opposite to the mounting hole 111. The second rotating cylinder part 82 is located between the mounting hole 111 and the mounting hole 321. The mounting hole 111 is provided with a bearing 2 13, and the mounting hole 2 321 is provided with a bearing 3 14. The central shaft 9 is fixedly connected to the second rotating cylinder part 82 by injection molding, and the two ends of the central shaft 9 are respectively fixedly rotated with the bearing 2 13 and the bearing 3 14. The central shaft 9 is integrally molded with the rotor assembly 8 by injection molding, and the central shaft 9 rotates with the rotor assembly 8

[0036] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A magnetic pump, comprising a pump assembly and a permanent magnet motor, wherein the pump assembly comprises a pump housing (1) having a water inlet (102) and a water outlet (101) and an impeller (2) arranged in the pump housing (1), characterized in that: The permanent magnet motor comprises a housing (3) and a housing (4) which are detachably fixedly connected. The housing (3) and the pump housing (1) are detachably fixedly connected. An isolation plate (31) and a stator portion (32) which is located in the middle of the isolation plate (31) and protrudes outwards are integrally formed in the housing (3). The isolation plate (31) and the stator portion (32) separate the interior of the pump housing (1), the housing (3) and the housing (4) into an installation cavity (5) and an installation cavity (6) which are not communicated with each other. A stator assembly (7) is injection-molded in the stator portion (32). An injection-molded rotor assembly (8) is arranged in the installation cavity (5). The rotor assembly (8) is rotatably sleeved on the outer periphery of the stator portion (32). A central shaft (9) is passed through the middle of the rotor assembly (8). An impeller (2) is fixedly connected to the rotor assembly (8). A control device is installed in the installation cavity (6).

2. A magnetic pump according to claim 1, characterized in that: The rotor assembly (8) comprises a first rotating drum portion (81) sleeved outside the stator portion (32) and a second rotating drum portion (82) embedded in the stator portion (32). One end of the first rotating drum portion (81) and the second rotating drum portion (82) are connected by a connecting portion (83). The connecting portion (83) is provided with a plurality of water holes (831).

3. A magnetic pump according to claim 2, characterized in that: A guide vane (11) is integrally formed in the pump housing (1), and a mounting hole (111) is provided on the lower end surface of the guide vane (11). A mounting hole (321) is provided in the middle of the stator portion (32) and is opposite to the mounting hole (111). The second rotating cylinder portion (82) is located between the mounting hole (111) and the mounting hole (321). The central axis (9) passes through the second rotating cylinder portion (82) and has two ends respectively embedded in the mounting hole (111) and the mounting hole (321) for keyway fixation. A bearing (10) is provided between the second rotating cylinder portion (82) and the central axis (9).

4. A magnetic pump according to claim 3, characterized in that: The first mounting hole (111) has a key block (112) protruding inwardly, and the central shaft (9) has a fixing groove (91) that cooperates with the first key block (112). The second mounting hole (321) has a key block (322) protruding inwardly, and the central shaft (9) has a fixing groove (92) that cooperates with the second key block (322). The key block (112) and the fixing groove (91) as well as the key block (322) and the fixing groove (92) cooperate to limit the circumferential movement of the central shaft (9).

5. A magnetic pump according to claim 4, characterized in that: The connecting portion (83) has a cylindrical fixing portion (84) protruding in the opposite direction of the second rotating cylinder portion (82) and coaxial with the second rotating cylinder portion (82). A plurality of large strip blocks (841) and small strip blocks (842) protrude outward from the outer circumference of the cylindrical fixing portion (84). A plurality of fan-shaped fixing blocks (21) protrude from one side of the impeller (2) close to the rotor assembly (8). A fixing groove (211) is provided in the middle of the fan-shaped fixing block (21). The fixing groove (211) is fixedly coupled with the small strip block (842). A fixing through groove (212) is provided between two adjacent fan-shaped fixing blocks (21). The fixing through groove (212) is fixedly coupled with the large strip block (841).

6. A magnetic pump according to claim 5, characterized in that: The cylindrical fixing part (84) and the second rotating cylinder part (82) have the same mounting through hole for passing the central shaft (9). A positioning convex ring (843) protrudes inward from the outer end of the cylindrical fixing part (84). The central shaft (9) abuts against the positioning convex ring (843). A shaft sleeve (12) is arranged between the first bearing (10) and the stator part (32).

7. A magnetic pump according to claim 2, characterized in that: A guide vane (11) is integrally formed in the pump housing (1), a mounting hole (111) is provided on the lower end surface of the guide vane (11), a mounting hole (321) is provided in the middle of the stator portion (32) and is opposite to the mounting hole (111), the second rotating cylinder portion (82) is located between the first mounting hole (111) and the second mounting hole (321), a second bearing (13) is provided in the first mounting hole (111), a third bearing (14) is provided in the second mounting hole (321), the central shaft (9) is fixedly connected to the second rotating cylinder portion (82) by injection molding, and the two ends of the central shaft (9) are respectively fixedly rotatably connected to the second bearing (13) and the third bearing (14).

8. A magnetic pump according to any one of claims 3 to 7, characterized in that: The guide vane (11) comprises a plurality of blades (113) and a cylindrical hub (114) for connecting the blades (113); a mounting hole (111) is located at the lower end of the cylindrical hub (114); the impeller (2) comprises an upper ring plate (22) and a lower ring plate (23); the inner hole of the upper ring plate (22) is larger than the inner hole of the lower ring plate (23); the lower parts of the cylindrical hub (114) and the blades (113) pass through the inner hole of the upper ring plate (22) until they are close to the lower ring plate (23); and the cylindrical hub (114) and the blades (113) are not in contact with the impeller (2).

9. A magnetic pump according to claim 1, characterized in that: A card block (401) and a card slot (301) that cooperate with each other are provided at the connection between the first housing (3) and the second housing (4); a mounting boss (302) protrudes from the first housing (3) toward the second housing (4); a mounting boss (402) protrudes from the second housing (4) toward the first housing (3); and the mounting boss (302) and the mounting boss (402) are fixed by a fixing member (15).

10. A magnetic pump according to claim 1, characterized in that: A sealing member (16) and a sealing groove (17) are provided at the connection between the casing one (3) and the pump casing (1), and the casing one (3) and the pump casing (1) are fixed by a fixing member two (18).

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