Magnetic drive pump

Abstract

The utility model discloses a magnetic drive pump, and relates to the technical field of fluid transportation. The magnetic drive pump comprises a pump shell, an impeller assembly, a rotor assembly and a stator assembly. A first suction part is arranged in the pump shell in the first direction. The impeller assembly is located in the pump shell, a second suction part opposite to the first suction part is embedded in the top of the impeller assembly in the first direction, and the first suction part and the second suction part can attract each other; the rotor assembly is connected with the impeller assembly and located on the side away from the pump shell in the first direction. The stator assembly is connected with the rotor assembly. By adopting the technology provided by the utility model, the static friction force can be effectively eliminated, and the phenomena of motor starting failure and bearing abrasion are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid transportation, in particular to a magnetic pump. Background Art

[0002] A magnetic drive pump utilizes magnetic coupling technology to transmit power. Its operating principle is that when a motor drives an outer magnetic rotor, the magnetic field penetrates air gaps and non-magnetic materials, driving the inner magnetic rotor connected to the impeller assembly to rotate synchronously, thus achieving contactless power transmission. Its compact structure and efficient transmission make it widely used in industries such as chemical engineering, pharmaceuticals, and electronics, where the purity of the fluids being transported is critical.

[0003] However, the motor of the magnetic pump drives the external magnetic rotor to rotate by energizing the stator coil to generate a magnetic field, causing the external magnetic rotor to rotate relative to the stator. The rotor and stator of the magnetic pump are connected by a moving ring and a stationary ring. This causes the stationary ring connected to the stator and the moving ring connected to the rotor to be in a state of sliding friction during normal operation of the motor, and in a state of static friction during startup. As a result, when the motor starts, it may sometimes fail to start due to the interaction of liquids (such as hydrogen bonds or van der Waals forces between water), and the friction can easily wear out the bearings. Utility Model Content

[0004] The utility model provides a magnetic pump to solve the problem in the prior art that when a motor of a magnetic pump is started, starting failure is easily caused by static friction between a rotor and a stator.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a magnetic pump, which includes: a pump casing, an impeller assembly, a rotor assembly and a stator assembly.

[0006] A first attraction member is provided inside the pump casing along the first direction; the impeller assembly is located inside the pump casing, and a second attraction member opposite to the first attraction member is embedded at the top along the first direction, wherein the first attraction member and the second attraction member can attract each other; the rotor assembly is connected to the impeller assembly and is located on the side away from the pump casing along the first direction; the stator assembly is connected to the rotor assembly.

[0007] The technical solution provided by this utility model has the following beneficial effects compared with the prior art:

[0008] By arranging a first attraction member in the pump casing and arranging a second attraction member in the impeller assembly that can attract each other with the first attraction member, when the motor starts, the impeller assembly can drive the rotor assembly connected to it away from the stator assembly under the action of the first attraction member and the second attraction member. That is, when the motor starts, a certain distance is allowed to exist between the dynamic ring of the rotor assembly and the static ring of the stator assembly, thereby effectively eliminating static friction and avoiding motor starting failure and bearing wear.

[0009] Among them, due to the gap between the rotor assembly and the stator assembly under the action of the first attraction member and the second attraction member, the process from motor startup to normal operation of the magnetic pump is changed from the current contact rotation of the dynamic ring relative to the static ring to non-contact rotation, which can effectively improve the smoothness and smoothness of motor startup. In addition, the first attraction member and the second attraction member are set on the pump housing and impeller assembly, without making major adjustments to the current magnetic pump structure, and the existing internal chamber space of the magnetic pump can be utilized.

[0010] In some embodiments, a fixing member is further embedded in the interior of the pump housing along the first direction, and the fixing member is used to fix the first suction member.

[0011] By adopting the above technical solution and adding a fixing member to install the first attracting member, the risk of the first attracting member falling out can be reduced.

[0012] In some embodiments, the fixing member protrudes from the inner wall of the pump housing on one side along the first direction, wherein the fixing member is an iron groove, and the first attraction member is embedded in the fixing member and is flush with the fixing member at the bottom along the first direction.

[0013] By adopting the above technical solution and embedding the first attracting member inside the iron groove, the focusing of the magnetic lines of force can be enhanced, thereby improving the adsorption capacity of the first attracting member on the second attracting member.

[0014] In some embodiments, the first attraction member is a magnetic ring, the second attraction member is an iron ring, and the first attraction member and the second attraction member are arranged opposite to each other.

[0015] In some embodiments, the first attraction member is an iron ring, the second attraction member is a magnetic ring, and the first attraction member and the second attraction member are arranged opposite to each other.

[0016] In some embodiments, the first attracting member is a magnetic ring, the second attracting member is a magnetic ring, and the first attracting member and the second attracting member have opposite magnetic properties on a surface facing each other along the first direction.

[0017] In some embodiments, a plurality of the first suction members are circumferentially spaced apart on the inner side of the pump casing, and a plurality of the second suction members are circumferentially spaced apart on the impeller assembly, wherein the first suction members correspond one to one with the majority of the second suction members.

[0018] By adopting the above technical solution, the first attraction member and the second attraction member are magnetically connected, so that the impeller assembly and the rotor assembly can move toward the side of the pump casing without contact, reducing the occupation of the internal space of the pump casing and avoiding affecting the fluid transportation efficiency of the magnetic pump.

[0019] In some embodiments, the impeller assembly includes an impeller and a disk, the impeller is connected to the disk, and the second attracting member is embedded in the disk. Further, the impeller and the disk are both provided with a plurality of spiral grooves that bend clockwise or counterclockwise.

[0020] With the above technical solution, the impeller assembly is composed of an impeller and a wheel disc, and the second attraction member is embedded in the wheel disc to reduce the load of the impeller and avoid obstruction to the rotation of the impeller.

[0021] In some embodiments, the stator assembly is locked to the pump housing, and a heat dissipation plate is provided on a side away from the pump housing along the first direction.

[0022] Using the above technical solution, the stator assembly includes a coil, and the electromagnetic field generated by the coil when energized drives the rotor to rotate. However, when the coil is energized, heat is also generated, which reduces the insulation performance of the coil. Adding a heat sink can effectively improve the heat dissipation efficiency of the stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0024] Figure 1 This is a cross-sectional view of an embodiment of a magnetic pump provided by the utility model;

[0025] Figure 2 This is a partial cross-sectional view of an embodiment of a magnetic pump provided by the utility model;

[0026] Figure 3 This is an example diagram of the circumferential spacing arrangement of an embodiment of a magnetic pump provided by the utility model;

[0027] Figure 4This is a schematic diagram of the three-dimensional structure of an impeller assembly of a magnetic pump provided by the utility model;

[0028] Figure 5 It is a three-dimensional structural diagram of an embodiment of a magnetic pump provided by the utility model.

[0029] In the picture:

[0030] 10. Pump casing; 11. First attracting member; 12. Fixing member; 13. Water outlet pipe; 20. Impeller assembly; 21. Second attracting member; 22. Impeller; 23. Wheel; 30. Rotor assembly; 31. Moving ring; 32. Permanent magnet; 40. Stator assembly; 41. Stationary ring; 42. Coil; 43. Heat sink. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In order to facilitate the subsequent description, before describing the specific structure of the magnetic pump, this application first combines Figure 1 Define the first direction (Z); combine Figure 3 A second direction (O) is defined. The first direction is the height direction of the magnetic pump when it is normally placed, such as the Z direction; the second direction is the circumferential direction of the magnetic pump when it is normally placed, such as the O direction.

[0033] See also Figure 1 As shown, Figure 1 A cross-sectional view of an embodiment of a magnetic pump provided by the present application is shown.

[0034] In some embodiments, the magnetic pump includes: a pump housing 10, an impeller assembly 20, a rotor assembly 30, and a stator assembly 40. The pump housing 10 is provided with a first attracting member 11 inside along a first direction; the impeller assembly 20 is located within the pump housing 10, and a second attracting member 21 is embedded in the top portion thereof along the first direction, opposite to the first attracting member 11, wherein the first attracting member 11 and the second attracting member 21 are capable of attracting each other; the rotor assembly 30 is connected to the impeller assembly 20 and is located on a side away from the pump housing 10 along the first direction; and the stator assembly 40 is connected to the rotor assembly 30.

[0035] In the embodiment of the present application, a first attraction member 11 is provided in the pump casing 10, and a second attraction member 21 that can attract each other with the first attraction member 11 is provided in the impeller assembly 20, so that when the motor starts, the impeller assembly 20 can drive the rotor assembly 30 connected thereto away from the stator assembly 40 under the action of the first attraction member 11 and the second attraction member 21, that is, when the motor starts, a certain distance is allowed to exist between the dynamic ring 31 of the rotor assembly 30 and the static ring 41 of the stator assembly 40, thereby effectively eliminating static friction and avoiding motor starting failure and bearing wear.

[0036] Exemplarily, the first attracting member 11 is a magnetic ring, and the second attracting member 21 is an iron ring. The first attracting member 11 and the second attracting member 21 are disposed opposite each other. The first attracting member 11 generates a magnetic field to exert a magnetic force on the second attracting member 21, thereby driving the impeller assembly 20 toward the pump housing 10. The impeller assembly 20 and the rotor assembly 30 are integrally connected to reduce mechanical losses during the rotation of the impeller assembly 20.

[0037] For example, the first attracting member 11 is an iron ring, the second attracting member 21 is a magnetic ring, and the first attracting member 11 and the second attracting member 21 are arranged opposite each other. When the first attracting member 11 is an iron ring and the second attracting member 21 is a magnetic ring, the first attracting member 11 and the second attracting member 21 can still attract each other, and the pump housing 10 cannot move. At this time, the impeller assembly 20 can still drive the dynamic ring 31 to move toward the pump housing 10.

[0038] See also Figure 2 As shown, Figure 2 A partial cross-sectional view of an embodiment of a magnetic pump provided by the present application is shown.

[0039] In some embodiments, the first attraction member 11 is a magnetic ring, the second attraction member 21 is a magnetic ring, and the first attraction member 11 and the second attraction member 21 have opposite magnetic properties on opposite sides along the first direction. Figure 2 As shown, the N pole of the first attraction member 11 faces the second attraction member 21, and the S pole of the second attraction member 21 faces the first attraction member 11, or it can be set as: the S pole of the first attraction member 11 faces the second attraction member 21, and the N pole of the second attraction member 21 faces the first attraction member 11.

[0040] Combine Figure 3 As shown, Figure 3 An example diagram of the circumferential spacing arrangement of an embodiment of a magnetic pump provided by the present application is shown.

[0041] In some embodiments, a plurality of first suction members 11 are circumferentially spaced apart on the inner side of the pump casing 10 , and a plurality of second suction members 21 are circumferentially spaced apart on the impeller assembly 20 , wherein the first suction members 11 correspond one-to-one to the majority of the second suction members 21 .

[0042] In the embodiment of the present application, the first attraction member 11 and the second attraction member 21 are magnetically connected, so that the impeller assembly 20 and the rotor assembly 30 can move toward the side of the pump casing 10 without contact, thereby reducing the occupation of the internal space of the pump casing 10 and avoiding affecting the fluid transportation efficiency of the magnetic pump.

[0043] Among them, due to the gap between the rotor assembly 30 and the stator assembly 40 under the action of the first attraction member 11 and the second attraction member 21, the process from motor startup to normal operation of the magnetic pump is changed from the current contact rotation of the dynamic ring 31 relative to the static ring 41 to non-contact rotation, which can effectively improve the smoothness and smoothness of motor startup. In addition, the first attraction member 11 and the second attraction member 21 are set on the pump housing 10 and the impeller assembly 20, without making major adjustments to the current magnetic pump structure, and the existing internal chamber space of the magnetic pump can be utilized.

[0044] In some embodiments, combined Figure 1 As shown, a fixing member 12 is further embedded in the interior of the pump housing 10 along the first direction, and the fixing member 12 is used to fix the first attraction member 11. Exemplarily, one side of the fixing member 12 along the first direction protrudes from the inner wall of the pump housing 10, wherein the fixing member 12 is an iron groove, and the first attraction member 11 is embedded in the fixing member 12 and is flush with the fixing member 12 at the bottom along the first direction.

[0045] In the embodiment of the present application, the additional fixing member 12 is provided to mount the first attracting member 11, which can reduce the risk of the first attracting member 11 coming out. The first attracting member 11 is embedded in the iron groove, which can also enhance the focusing of magnetic lines of force, thereby improving the adsorption capacity of the first attracting member 11 on the second attracting member 21.

[0046] See also Figure 4 As shown, Figure 4 A schematic three-dimensional structure diagram of an embodiment of an impeller assembly 20 of a magnetic pump provided by the present application is shown.

[0047] In some embodiments, the impeller assembly 20 includes an impeller 22 and a wheel disc 23, wherein the impeller 22 is connected to the wheel disc 23, wherein the second attracting member 21 is embedded in the wheel disc 23. Furthermore, the impeller 22 and the wheel disc 23 are each provided with a plurality of spiral grooves that bend clockwise or counterclockwise.

[0048] In the embodiment of the present application, the impeller assembly 20 is composed of an impeller 22 and a wheel disc 23, and the second attraction member 21 is embedded in the wheel disc 23 to reduce the load of the impeller 22 and avoid hindering the rotation of the impeller 22. For example, Figure 4 The middle spiral groove bends in a clockwise direction.

[0049] See also Figure 5 As shown, Figure 5A schematic diagram of the three-dimensional structure of an embodiment of a magnetic pump provided by the present application is shown.

[0050] In some embodiments, the stator assembly 40 is locked to the pump housing 10 , and a heat dissipation plate 43 is provided on a side away from the pump housing 10 along the first direction.

[0051] In the embodiment of the present application, the stator assembly 40 includes a coil 42, which is energized to form an electromagnetic field to drive the rotor to rotate. However, when the coil 42 is energized, heat is also generated, which reduces the insulation performance of the coil 42. Adding a heat sink can effectively improve the heat dissipation efficiency of the stator assembly 40.

[0052] Exemplarily, the pump casing 10 is also provided with a water outlet pipe 13 connected to the internal impeller assembly 20. When the rotor assembly 30 rotates to drive the impeller assembly 20 to rotate, the multiple water inlets provided on the pump casing 10 can pump the fluid to the water outlet pipe 13 under the rotation of the impeller 22, wherein the spiral groove bending in the clockwise direction can enhance the flow rate of the water outlet pipe 13.

[0053] The above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, should be included in the protection scope of the present invention.

Claims

1. A magnetic pump, characterized in that: include: A pump housing, wherein a first suction member is provided inside the pump housing along a first direction; an impeller assembly, the impeller assembly being located in the pump housing and having a second attracting member embedded in the top portion thereof along the first direction and opposite to the first attracting member, wherein the first attracting member and the second attracting member are capable of attracting each other; a rotor assembly, the rotor assembly being connected to the impeller assembly and being located away from the pump casing along the first direction; A stator assembly is connected to the rotor assembly.

2. The magnetic pump according to claim 1, characterized in that A fixing member is further embedded in the interior of the pump housing along the first direction, and the fixing member is used to fix the first suction member.

3. The magnetic pump according to claim 2, characterized in that One side of the fixing member along the first direction protrudes from the inner wall of the pump housing, wherein the fixing member is an iron groove, the first attracting member is embedded in the fixing member, and the bottom along the first direction is flush with the fixing member.

4. The magnetic pump according to claim 1, characterized in that The first attraction member is a magnetic ring, the second attraction member is an iron ring, and the first attraction member and the second attraction member are arranged opposite to each other.

5. The magnetic pump according to claim 1, characterized in that The first attraction member is an iron ring, the second attraction member is a magnetic ring, and the first attraction member and the second attraction member are arranged opposite to each other.

6. The magnetic pump according to claim 1, characterized in that The first attraction member is a magnetic ring, the second attraction member is a magnetic ring, and the first attraction member and the second attraction member have opposite magnetic properties on opposite sides along the first direction.

7. The magnetic pump according to claim 1, characterized in that A plurality of the first suction members are arranged at intervals along the circumferential direction on the inner side of the pump casing, and a plurality of the second suction members are arranged at intervals along the circumferential direction on the impeller assembly, wherein the first suction members correspond to the majority of the second suction members in a one-to-one manner.

8. The magnetic pump according to any one of claims 1 to 7, characterized in that The impeller assembly includes an impeller and a wheel disc, wherein the impeller is connected to the wheel disc, wherein the second attraction member is embedded in the wheel disc.

9. The magnetic pump according to claim 8, characterized in that The impeller and the wheel disc are both provided with a plurality of spiral grooves bent in a clockwise or counterclockwise direction.

10. The magnetic pump according to any one of claims 1 to 7, characterized in that: The stator assembly is locked to the pump housing, and a heat dissipation plate is provided on a side away from the pump housing along the first direction.

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