Magnetic suspension pump rotor and magnetic suspension pump with same

Abstract

The utility model provides a magnetic suspension pump rotor and a magnetic suspension pump with the same. The magnetic suspension pump rotor comprises a rotor body, a permanent magnet, a blade assembly and a cover plate, the permanent magnet is arranged in the rotor body, the blade assembly is arranged on the rotor body, the cover plate is arranged on the blade assembly, and in the circumferential direction of the rotating axis, the diameter of the blade assembly is larger than that of the rotor body, so that the rotor can rotate according to the size of an inner cavity of the pump under the condition that the stator, the power source and the rotor body are kept unchanged. The blade assembly reasonably extends outwards, the rotor is provided with the blade assembly with the large diameter, then the lift of the magnetic suspension pump can be improved, and the use range of the magnetic suspension pump is widened.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic levitation pumps, and in particular to a magnetic levitation pump rotor and a magnetic levitation pump having the same. Background Art

[0002] Magnetic levitation pumps have been widely used in many fields due to their unique contactless suspension technology. For example, in the pharmaceutical and biotechnology fields, they are used to transport drug solutions, cell culture media, vaccines, etc.; in the semiconductor field, they are used for high-purity liquid delivery, equipment cooling, precise flow control, etc., providing strong support for the stability, efficiency, cleanliness and precision of semiconductor manufacturing processes.

[0003] Head is one of the main parameters to measure the performance of magnetic levitation pumps. Head refers to the height to which the pump can lift liquid or overcome the resistance of the pipeline system, usually measured in meters. Each magnetic levitation pump has a certain head range, indicating its ability to lift liquid or overcome resistance. When the stator and power source remain unchanged, increasing the pump's head becomes a problem to be solved. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a magnetic levitation pump rotor and a magnetic levitation pump having the same.

[0005] In the first aspect of the present application, a magnetic levitation pump rotor is provided, comprising a rotor body, a permanent magnet, a blade assembly and a cover plate; the permanent magnet is arranged in the rotor body, the blade assembly is arranged on the rotor body, the cover plate is arranged on the blade assembly, and in the circumferential direction of the rotation axis, the diameter of the blade assembly is larger than the diameter of the rotor body.

[0006] In some embodiments of the present application, the blade assembly includes a plurality of blades arranged at intervals in a clockwise or counterclockwise direction, and a first flow channel for pumping fluid is formed between the blades.

[0007] In some embodiments of the present application, a through hole is provided at the center of the cover plate to form a second flow channel for pumping fluid, and the first flow channel and the second flow channel are interconnected.

[0008] In some embodiments of the present application, the blade includes an upper blade and a lower blade, the upper blade is arranged above the lower blade, and in the circumferential direction of the rotation axis, the size of the upper blade is greater than or equal to the size of the lower blade.

[0009] In some embodiments of the present application, in the circumferential direction of the rotation axis, the size of the lower blade is smaller than or equal to the size of the rotor body.

[0010] In some embodiments of the present application, the lower surface of the upper blade is a plane.

[0011] In some embodiments of the present application, the lower surface of the upper blade is a curved surface.

[0012] In some embodiments of the present application, the lower surface of the upper blade is an inclined surface.

[0013] In some embodiments of the present application, the upper blade and the lower blade are integrally formed.

[0014] In some embodiments of the present application, the cover plate is in a conical ring shape.

[0015] In some embodiments of the present application, in the circumferential direction of the rotation axis, the size of the cover plate is smaller than or equal to the size of the upper blade.

[0016] A second aspect of the present application provides a magnetic levitation pump, comprising the magnetic levitation pump rotor and a housing, wherein the rotor is suspended and contactlessly disposed within the housing.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects: the diameter of the blade assembly in the magnetic levitation pump rotor of the present application is larger than the diameter of the rotor body. In this way, when the stator, power source and rotor body remain unchanged, the blade assembly is reasonably extended outward according to the size of the inner chamber of the pump, so that the rotor has a blade assembly with a larger diameter, thereby increasing the head of the magnetic levitation pump and expanding the scope of use of the magnetic levitation pump.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of this document are used to provide a further understanding of this document. The exemplary embodiments and descriptions of this document are used to explain this document and do not constitute an improper limitation on this document. In the accompanying drawings:

[0020] Figure 1 is a schematic structural diagram of a magnetic suspension pump rotor provided by an exemplary embodiment of the present application;

[0021] Figure 2 is a front view of a magnetic suspension pump rotor provided by an exemplary embodiment of the present application;

[0022] Figure 3 yes Figure 2 Sectional view at CC;

[0023] Figure 4 yes Figure 2 Sectional view at the middle BB;

[0024] Figure 5is a bottom view of a magnetic suspension pump rotor provided by an exemplary embodiment of the present application;

[0025] Figure 6 It is a flow head curve provided by an exemplary embodiment of the present application.

[0026] In the figure:

[0027] 100, cover plate; 200, blade assembly; 201, upper blade; 202, lower blade; 300, rotor body; 400, permanent magnet; 500, first flow channel; 600, second flow channel. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0029] Magnetic levitation pumps have been widely used in many fields due to their unique contactless suspension technology. For example, in the pharmaceutical and biotechnology fields, they are used to transport drug solutions, cell culture media, vaccines, etc.; in the semiconductor field, they are used for high-purity liquid delivery, equipment cooling, precise flow control, etc., providing strong support for the stability, efficiency, cleanliness and precision of semiconductor manufacturing processes.

[0030] Head is one of the main parameters to measure the performance of magnetic levitation pumps. Head refers to the height to which the pump can lift liquid or overcome the resistance of the pipeline system, usually measured in meters. Each magnetic levitation pump has a certain head range, indicating its ability to lift liquid or overcome resistance. When the stator and power source remain unchanged, increasing the pump's head becomes a problem to be solved.

[0031] Based on this, an exemplary embodiment of the present application provides a magnetic levitation pump rotor, in which the diameter of the blade assembly is larger than the diameter of the rotor body. In this way, while the stator, power source and rotor body remain unchanged, the blade assembly has a larger diameter, which can increase the head of the magnetic levitation pump and expand the scope of use of the magnetic levitation pump.

[0032] An exemplary embodiment of the present application provides a magnetic suspension pump rotor, such as Figures 1 to 3As shown, the magnetic levitation pump rotor includes a rotor body 300, a permanent magnet 400, a blade assembly 200 and a cover plate 100; the permanent magnet 400 is arranged in the rotor body 300, the blade assembly 200 is arranged on the rotor body 300, and the cover plate 100 is arranged on the blade assembly 200, X is the rotation axis of the rotor, and in the circumferential direction of the rotation axis, the diameter of the blade assembly 200 is greater than the diameter of the rotor body 300, so that when the stator, the power source and the rotor body 300 remain unchanged, according to the size of the inner chamber of the pump, the blade assembly 200 is reasonably extended outward, so that the rotor has a blade assembly 200 with a larger diameter, thereby improving the head of the magnetic levitation pump and expanding the scope of use of the magnetic levitation pump. At the same time, according to the size of the inner chamber of the pump, the maximum diameter of the blade assembly 200 can be obtained. At this time, the diameter of the blade assembly 200 can be changed within the range of the maximum diameter and the diameter of the rotor body 300, that is, different types of rotors are obtained. While keeping the stator unchanged, different types of rotors can be configured based on the same type of magnetic levitation motor to obtain magnetic levitation pumps with different head ranges. Therefore, a variety of different types of magnetic levitation pumps can be configured to improve the versatility of the stator, permanent magnet 400, etc.

[0033] like Figure 4 and 5 As shown, the blade assembly 200 includes a plurality of blades arranged in a clockwise rotational direction, and a first flow channel 500 for pumping fluid is formed between each blade. In one embodiment, the blade assembly 200 includes four blades arranged in a clockwise rotational direction, and four first flow channels 500 are formed between the four blades. Depending on the working conditions or power source, the blades can also be arranged in a counterclockwise rotational direction.

[0034] A through hole is provided at the center of the cover plate 100 to form a second flow channel 600 for pumping fluid, and the first flow channel 500 and the second flow channel 600 are interconnected. In the working state, the liquid enters the rotor from the second flow channel 600, is transported to the first flow channel 500, and is transported to the outside of the rotor through the first flow channel 500.

[0035] To prevent interference and further improve pump performance, the blades are arranged in two parts, e.g. Figure 2 As shown, the blades include an upper blade 201 and a lower blade 202. The upper blade 201 is arranged above the lower blade 202. In the circumferential direction of the rotation axis, the size of the upper blade 201 is greater than or equal to the size of the lower blade 202. Preferably, the size of the upper blade 201 is greater than the size of the lower blade 202. Figure 6As shown, Figure (a) shows the flow-head curve of the pump when the size of the upper blade 201 is equal to the size of the lower blade 202, and Figure (b) shows the flow-head curve of the pump when the size of the upper blade 201 is larger than the size of the lower blade 202. It can be seen from the figure that when the size of the upper blade 201 is equal to the size of the lower blade 202, the flow-head curve of the pump tends to rise first and then fall, and a hump will be formed in the middle. The head changes more drastically with the flow rate, which will affect the stability of the pump. When the size of the upper blade 201 is larger than the size of the lower blade 202, the flow-head curve of the magnetic levitation pump shows a smooth downward trend, and the head changes more evenly and gently with the flow rate, so that the magnetic levitation pump has good working stability at different flow rates, which helps to maintain the stability of the system pressure.

[0036] In the circumferential direction of the rotation axis, the size of the lower blade 202 is smaller than or equal to the size of the rotor body 300. Figure 2 and 3 As shown, at this time, the size of the lower blade 202 is equal to the size of the rotor body 300, and the flow head curve of the pump is smoothly descending, which can avoid the hump of the flow head curve.

[0037] Continue to refer Figure 2 Or 3, the lower surface of the upper blade 201 is a plane, in this case, the lower surface of the upper blade 201 and the outer peripheral surface of the lower blade 202 are set at a right angle, the structure is simple, and the processing is convenient. The upper blade 201 and the lower blade 202 are integrally formed, in this case, the lower surface of the upper blade 201 and the outer peripheral surface of the lower blade 202 can be designed as an integral whole, for example, along the outer peripheral surface of the upper blade 201 to the outer peripheral surface of the lower blade 202, the lower surface of the upper blade 201 is a curved surface, and a smoothly descending curved surface is formed between the lower surface of the upper blade 201 and the outer peripheral surface of the lower blade 202. In one embodiment, the lower surface of the upper blade 201 is an inclined surface, in this case, the lower surface of the upper blade 201 and the outer peripheral surface of the lower blade 202 are set at an obtuse angle.

[0038] like Figure 3 As shown, the cover plate 100 is in a conical ring shape. At this time, the upper surface of the upper blade 201 is also inclined, and its inclination angle is adapted to the taper of the cover plate 100, which can reduce the resistance to the liquid.

[0039] In the circumferential direction of the rotation axis, the size of the cover plate 100 is smaller than or equal to the size of the upper blade 201. Figure 3 As shown, at this time, the size of the cover plate 100 is equal to the size of the upper blade 201, and the flow head curve of the pump is smoothly descending, which can avoid the hump of the flow head curve and balance the axial force of the rotor and the force of the fluid.

[0040] A magnetic levitation pump comprises the magnetic levitation pump rotor and a housing, wherein the rotor is suspended and non-contactly arranged in the housing. The diameter of the blade assembly 200 can be changed within a range of a maximum diameter and a diameter equal to that of the rotor body 300 to obtain rotors of different models. Under the condition that the stator remains unchanged, different models of rotors can be configured based on the same model of magnetic levitation motor to obtain magnetic levitation pumps of different head ranges, and thus, a plurality of different models of magnetic levitation pumps can be configured.

[0041] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0042] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0043] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the intention of the present application also includes these modifications and variations.

Claims

1. A magnetic suspension pump rotor, characterized in that: It includes a rotor body, a permanent magnet, a blade assembly and a cover plate; the permanent magnet is arranged in the rotor body, the blade assembly is arranged on the rotor body, the cover plate is arranged on the blade assembly, and in the circumferential direction of the rotation axis, the diameter of the blade assembly is larger than the diameter of the rotor body.

2. The magnetic suspension pump rotor according to claim 1, characterized in that: The blade assembly includes a plurality of blades arranged at intervals in a clockwise or counterclockwise direction, and a first flow channel for pumping fluid is formed between the blades.

3. The magnetic suspension pump rotor according to claim 2, characterized in that: A through hole is provided at the center of the cover plate to form a second flow channel for pumping fluid, and the first flow channel and the second flow channel are connected to each other.

4. The magnetic suspension pump rotor according to claim 2, characterized in that: The blades include an upper blade and a lower blade, the upper blade is arranged above the lower blade, and in the circumferential direction of the rotation axis, the size of the upper blade is greater than or equal to the size of the lower blade.

5. The magnetic suspension pump rotor according to claim 4, characterized in that: In the circumferential direction of the rotation axis, the size of the lower blade is smaller than or equal to the size of the rotor body.

6. The magnetic suspension pump rotor according to claim 4, characterized in that: The lower surface of the upper blade is a plane.

7. The magnetic suspension pump rotor according to claim 4, characterized in that: The lower surface of the upper blade is a curved surface.

8. The magnetic suspension pump rotor according to claim 4, characterized in that: The lower surface of the upper blade is an inclined surface.

9. The magnetic suspension pump rotor according to claim 4, characterized in that: The upper blade and the lower blade are integrally formed.

10. The magnetic suspension pump rotor according to claim 1, characterized in that: The cover plate is in a conical ring shape.

11. The magnetic suspension pump rotor according to claim 4, characterized in that: In the circumferential direction of the rotation axis, the size of the cover plate is smaller than or equal to the size of the upper blade.

12. A magnetic levitation pump, characterized in that: The invention comprises a magnetic levitation pump rotor and a housing according to any one of claims 1 to 11, wherein the rotor is suspended and non-contactly arranged in the housing.

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