Magnetic suspension bearing stator assembly and magnetic suspension motor having the same

Abstract

The present invention provides a magnetic suspension bearing stator assembly and a magnetic suspension motor having the same, the magnetic suspension bearing stator assembly comprises: a magnetic conductive ring, a magnetic steel, a radial ring and an iron core, the magnetic conductive ring and the magnetic steel are located on one side of the radial ring, the iron core is partially arranged in the radial ring, a plastic sealing cavity is formed between the magnetic conductive ring, the magnetic steel, the radial ring and the iron core, the middle part of the iron core has an avoidance hole, the plastic sealing cavity is located on the periphery of the avoidance hole, and the plastic sealing cavity is filled with plastic sealing glue. The technical solution provided by the present application can solve the problem of unreliable fixation of internal parts of the stator assembly in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic suspension bearings, and in particular to a magnetic suspension bearing stator assembly and a magnetic suspension motor having the same. Background Art

[0002] Currently, if Figure 1 and Figure 2 As shown, the existing magnetic bearing stator assembly includes a magnetic ring 1, a fixing frame, a magnetic steel 2, a coil 3, a radial ring 4 and an iron core 5. During installation, the fixing frame is used to fix the position of the magnetic steel 2, and then the magnetic steel 2 is respectively connected to the magnetic ring 1 and the radial ring 4 by bonding. During use, when the motor is in a harsh working environment such as impact and vibration, the bonding may fail, causing the magnetic steel to fall off, or causing the magnetic ring to separate from the radial ring, thereby causing the motor to fail to work normally. Summary of the invention

[0003] The invention provides a magnetic suspension bearing stator assembly and a magnetic suspension motor having the same, so as to solve the problem that the internal parts of the stator assembly are not firmly fixed in the prior art.

[0004] In one aspect of the present invention, a magnetic bearing stator assembly is provided, which includes: a magnetic ring, a magnetic steel, a radial ring and an iron core. The magnetic ring and the magnetic steel are located on one side of the radial ring, and the iron core is partially arranged in the radial ring. A plastic sealing cavity is formed between the magnetic ring, the magnetic steel, the radial ring and the iron core. An avoidance hole is provided in the middle of the iron core. The plastic sealing cavity is located on the outer periphery of the avoidance hole, and the plastic sealing cavity is filled with plastic sealing glue.

[0005] Furthermore, the magnetic steel is located between the magnetic conductive ring and the radial ring, and plastic sealing glue is provided between the magnetic steel and the magnetic conductive ring, and between the magnetic steel and the radial ring.

[0006] Furthermore, the magnetic bearing stator assembly also includes: a fixing frame, the magnetic steel is arranged on the fixing frame, and the fixing frame is fixed between the magnetic conductive ring and the radial ring by plastic sealing glue.

[0007] Furthermore, plastic sealing glue is arranged between the magnetic conductive ring and the radial ring.

[0008] Furthermore, plastic sealing glue is arranged between the iron core and the radial ring.

[0009] Furthermore, the magnetic bearing stator assembly also includes: a coil, which is arranged on the iron core, and a plastic sealant is arranged between the coil and the iron core.

[0010] Furthermore, the iron core has a coil slot and a through hole, and the coil slot and the through hole are filled with plastic sealing glue.

[0011] Furthermore, the iron core has an inner side surface and an outer side surface that are arranged opposite to each other, and the plastic sealant penetrates the coil slot and the through holes are arranged on the inner side surface and the outer side surface.

[0012] Furthermore, the iron core comprises a plurality of iron core units, and the plurality of iron core units are arranged in a radial ring along annular intervals, and plastic sealing glue is arranged between two adjacent iron core units and between the iron core units and the radial ring.

[0013] In another aspect of the present invention, a magnetic levitation motor is provided. The magnetic levitation motor includes the magnetic levitation bearing stator assembly provided above.

[0014] By applying the technical solution of the present invention, the stator assembly of the magnetic bearing includes a magnetic ring, a magnetic steel, a radial ring and an iron core, wherein a plastic sealing cavity is provided between the magnetic ring, the magnetic steel, the radial ring and the iron core, and plastic sealing glue is poured into the plastic sealing cavity to fix the magnetic ring, the magnetic steel, the radial ring and the iron core together through the plastic sealing glue, so that related components can be connected and fixed through the plastic sealing glue. Such a setting can improve the stability between the internal components of the device and extend the service life of the device, and the above-mentioned process structure is simple and easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 A front view of a magnetic bearing stator assembly provided according to the prior art is shown;

[0017] Figure 2 Shows Figure 1 Sectional view at AA in the middle;

[0018] Figure 3 An exploded view of a magnetic bearing stator assembly provided according to an embodiment of the present invention is shown;

[0019] Figure 4 A front view of a magnetic bearing stator assembly provided according to an embodiment of the present invention is shown;

[0020] Figure 5 Shows Figure 4 Sectional view at the middle BB;

[0021] Figure 6 Shows Figure 4 Sectional view at CC;

[0022] Figure 7 An exploded view of a magnetic bearing stator assembly according to yet another embodiment of the present invention is shown.

[0023] The above drawings include the following reference numerals:

[0024] 1. Magnetic ring; 2. Magnetic steel; 3. Coil; 4. Radial ring; 5. Iron core;

[0025] 10. Magnetic ring; 20. Magnetic steel; 30. Radial ring;

[0026] 40. iron core; 41. avoidance hole; 42. coil slot; 43. through hole; 44. iron core unit;

[0027] 50. Plastic sealing adhesive; 60. Fixing frame; 70. Coil. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 3 to 6 As shown, an embodiment of the present application provides a magnetic bearing stator assembly, which includes: a magnetic ring 10, a magnetic steel 20, a radial ring 30 and an iron core 40, wherein the magnetic ring 10 and the magnetic steel 20 are located on one side of the radial ring 30, and the iron core 40 is partially arranged in the radial ring 30, and the iron core 40 is located on the other side of the radial ring 30. A plastic sealing cavity is formed between the magnetic ring 10, the magnetic steel 20, the radial ring 30 and the iron core 40, and a avoidance hole 41 is provided in the middle of the iron core 40, and the avoidance hole 41 is used to pass the rotor. The plastic sealing cavity is located at the periphery of the avoidance hole 41, and the plastic sealing cavity is filled with plastic sealing glue 50. Through the above structure, the plastic sealing glue 50 can be used to fix the various components of the stator assembly well, strengthen the connection between the various components, and avoid shaking or connection failure during use.

[0030] Through the technical solution provided by the present application, the magnetic suspension bearing stator assembly includes a magnetic ring 10, a magnetic steel 20, a radial ring 30 and an iron core 40. Among them, a plastic sealing cavity is provided between the magnetic ring 10, the magnetic steel 20, the radial ring 30 and the iron core 40, and a plastic sealing glue 50 is poured into the plastic sealing cavity, so that the magnetic ring 10, the magnetic steel 20, the radial ring 30 and the iron core 40 can be fixed together by the plastic sealing glue 50, so that the related components can be connected and fixed by the plastic sealing glue 50, such a setting can improve the stability between the internal components of the device, extend the service life of the device, and the above-mentioned process structure is simple and easy to process.

[0031] The plastic sealant 50 may be made of epoxy resin material, which has insulating properties, is heat-resistant and corrosion-resistant, and has good thermal conductivity. It can fix the components while improving the overall heat dissipation performance of the device to ensure the normal operation of the device.

[0032] Specifically, the magnetic steel 20 is located between the magnetic conductive ring 10 and the radial ring 30, and the magnetic steel 20 is clamped between the magnetic conductive ring 10 and the radial ring 30. Plastic sealant 50 can be provided between the magnetic steel 20 and the magnetic conductive ring 10, and between the magnetic steel 20 and the radial ring 30. In this way, the magnetic steel 20 can be firmly fixed between the magnetic conductive ring 10 and the radial ring 30. Through the above fixing method, the addition of a fixing frame to fix the magnetic steel 20 in the existing design can be omitted, and the device structure can be simplified while fixing the magnetic steel.

[0033] Of course, a fixing frame 60 can also be added to the device, and the fixing frame 60 can be used to facilitate positioning and fixing the position of the magnetic steel 20 on the magnetic conductive ring 10 and the radial ring 30. Specifically, the magnetic steel 20 is set on the fixing frame 60, and the fixing frame 60 is fixed between the magnetic conductive ring 10 and the radial ring 30 through the plastic sealant 50. In this way, the magnetic steel 20 can be quickly positioned, the magnetic steel 20, the magnetic conductive ring 10 and the radial ring 30 are coaxially arranged, and the fixing effect on the magnetic steel 20 can be strengthened, and the stability of the magnetic steel 20 can be further improved.

[0034] Specifically, a plastic sealant 50 is also provided between the magnetic conductive ring 10 and the radial ring 30, so that the magnetic conductive ring 10 and the radial ring 30 can be directly fixed by the plastic sealant 50, so that the two can be firmly fixed together, and the magnetic conductive ring 10, the magnetic steel 20 and the radial ring 30 form an integral structure by the plastic sealant 50. Compared with the method in the prior art in which the magnetic conductive ring 10 and the radial ring 30 are only bonded together by the magnetic steel 20, the fixing effect and stability are better.

[0035] In this embodiment, a plastic sealant 50 is also provided between the iron core 40 and the radial ring 30. The iron core 40 and the radial ring 30 are fixed by the plastic sealant 50. Compared with the fixing method of the iron core 40 and the radial ring 30 by interference fit in the existing design, it is convenient to process, has higher processing efficiency, and the iron core 40 and the radial ring 30 are fixed more firmly.

[0036] Specifically, the stator assembly of the magnetic bearing also includes a coil 70, which is arranged on the iron core 40, and a plastic sealant 50 is arranged between the coil 70 and the iron core 40. The plastic sealant 50 can fix the coil 70, and the plastic sealant 50 can fully penetrate into the coil 70, so that the air between the original coils is replaced by solid colloid, which can enhance the insulation ability of the coil 70 and prevent the insulation layer on the surface of the coil 70 from being broken down, while greatly improving the thermal conductivity and enhancing the heat dissipation ability.

[0037] Among them, the iron core 40 has a coil slot 42 and a through hole 43, the coil 70 is arranged in the coil slot 42, and the coil slot 42 and the through hole 43 are filled with plastic sealing glue 50, so that the stator assembly can be plastic-sealed as a whole, which can further improve the fixing effect and make the internal components an integral structure.

[0038] Figure 5 and Figure 6 The cross-sectional view at the coil slot 42 and the cross-sectional view at the through hole 43 are shown respectively. In this embodiment, the iron core 40 has an inner side surface and an outer side surface that are arranged opposite to each other, and the plastic sealant 50 penetrates the coil slot 42 and the through hole 43 and is arranged on the inner side surface and the outer side surface. In this way, the iron core 40 and the coil 70 can be clamped by the inner and outer plastic sealants 50 to further improve the fixing effect.

[0039] Through the technical solution provided in the present application, the stator assembly is fixed inside with plastic sealant 50, which improves the overall structural strength and shock resistance, increases the system reliability; enhances the electrical safety performance of the coil, so that it can work in a more severe environment; makes the stator assembly a whole, enhances the overall heat dissipation performance; reduces the number of parts, and reduces the processing cost.

[0040] In another embodiment provided in the present application, Figure 7 As shown, the core 40 includes a plurality of core units 44, and the plurality of core units 44 are arranged in the radial ring 30 along the annular interval, and plastic sealant 50 is arranged between two adjacent core units 44 and between the core unit 44 and the radial ring 30. The core 40 is fixed by the plastic sealant 50, so that the core 40 can be divided into several independent core units 44, and the core 40 does not need to be made into an integral structure, so that the structure of the core 40 is diversified. In this embodiment, the core 40 is manufactured in blocks, and the coil 70 is wound and then installed on the radial ring 30 as a whole. After the assembly is completed, the plastic sealant is filled according to the above scheme. Such a setting can facilitate the realization of mechanical automatic winding; reduce the size of the core mold and reduce the mold cost; and the core 40 and the radial ring 30 can be assembled by using clearance fit, which can avoid the hot installation process and reduce the difficulty of assembly.

[0041] In another embodiment provided in the present application, a magnetic levitation motor is provided. The magnetic levitation motor includes the magnetic levitation bearing stator assembly provided in the above embodiment.

[0042] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0043] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0044] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0045] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0046] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic bearing stator assembly, characterized in that: The magnetic bearing stator assembly comprises: A magnetic conductive ring (10), a magnetic steel (20), a radial ring (30) and an iron core (40), wherein the magnetic conductive ring (10) and the magnetic steel (20) are located on one side of the radial ring (30), and the iron core (40) is partially arranged in the radial ring (30). A plastic sealing cavity is formed between the magnetic conductive ring (10), the magnetic steel (20), the radial ring (30) and the iron core (40). A avoidance hole (41) is provided in the middle of the iron core (40), and the plastic sealing cavity is located on the outer periphery of the avoidance hole (41). The plastic sealing cavity is filled with plastic sealing glue (50). The magnetic steel (20) is located between the magnetic conductive ring (10) and the radial ring (30), and the plastic sealing glue (50) is provided between the magnetic steel (20) and the magnetic conductive ring (10), and between the magnetic steel (20) and the radial ring (30).

2. The magnetic bearing stator assembly according to claim 1, characterized in that: The magnetic bearing stator assembly also includes: A fixing frame (60), the magnetic steel (20) is arranged on the fixing frame (60), and the fixing frame (60) is fixed between the magnetic conductive ring (10) and the radial ring (30) by means of the plastic sealing glue (50).

3. The magnetic bearing stator assembly according to claim 1, characterized in that: The plastic sealing glue (50) is arranged between the magnetic conductive ring (10) and the radial ring (30).

4. The magnetic bearing stator assembly according to claim 1, characterized in that: The plastic sealant (50) is arranged between the iron core (40) and the radial ring (30).

5. The magnetic bearing stator assembly according to claim 1, characterized in that: The magnetic bearing stator assembly also includes: The coil (70) is arranged on the iron core (40), and the plastic sealing glue (50) is arranged between the coil (70) and the iron core (40).

6. The magnetic bearing stator assembly according to claim 1, characterized in that: The iron core (40) has a coil slot (42) and a through hole (43), and the coil slot (42) and the through hole (43) are filled with the plastic sealing glue (50).

7. The magnetic bearing stator assembly according to claim 6, characterized in that: The iron core (40) has an inner side surface and an outer side surface that are arranged opposite to each other, and the plastic sealant (50) penetrates the coil slot (42) and the through hole (43) and is arranged on the inner side surface and the outer side surface.

8. The magnetic bearing stator assembly according to claim 1, characterized in that: The iron core (40) comprises a plurality of iron core units (44), wherein the plurality of iron core units (44) are arranged in the radial ring (30) along annular intervals, and the plastic sealing glue (50) is arranged between two adjacent iron core units (44) and between the iron core unit (44) and the radial ring (30).

9. A magnetic levitation motor, characterized in that: The magnetic levitation motor comprises the magnetic levitation bearing stator assembly according to any one of claims 1 to 8.

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