WO2022142318A1

WO2022142318A1 - Magnetic suspension bearing stator assembly and magnetic suspension motor having same

Info

Publication number: WO2022142318A1
Application number: PCT/CN2021/109441
Authority: WO
Inventors: 龚高; 张芳; 张超; 董如昊
Original assignee: 珠海格力电器股份有限公司
Priority date: 2020-12-28
Filing date: 2021-07-30
Publication date: 2022-07-07
Also published as: CN112648290A

Abstract

A magnetic suspension bearing stator assembly and a magnetic suspension motor having same. The magnetic suspension bearing stator assembly comprises: a magnetic conductive ring (10), a permanent magnet (20), a radial ring (30), and an iron core (40). The magnetic conductive ring (10) and the permanent magnet (20) are located on the side of the radial ring (30). The iron core (40) is partially disposed in the radial ring (30). A plastic sealing cavity is formed among the magnetic conductive ring (10), the permanent magnet (20), the radial ring (30), and the iron core (40). An avoidance hole (41) is provided in the middle of the iron core (40). The plastic sealing cavity is located on the periphery of the avoidance hole (41), and is filled with a plastic sealant (50).

Description

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

Related applications

This application claims the priority of the Chinese patent application filed on December 28, 2020 with the application number of 202011589370.5 and the title of "Maglev bearing stator assembly and magnetic levitation motor having the same", which is hereby incorporated by reference in its entirety.

technical field

The present application 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 technique

As shown in FIG. 1 and FIG. 2 , the magnetic suspension bearing stator assembly of the related art includes a magnetic permeable ring 1 , a fixed frame, a permanent magnet 2 , a coil 3 , a radial ring 4 and an iron core 5 . During installation, the position of the permanent magnet 2 is fixed by a fixing frame, and then the permanent magnet 2 is connected to the magnetic conducting ring 1 and the radial ring 4 respectively by bonding. During use, when the motor is in a harsh working environment such as shock and vibration, the bonding may fail, causing the permanent magnet to fall off, or cause the magnetic ring to separate from the radial ring, thereby causing the motor to fail to work normally.

SUMMARY OF THE INVENTION

The present application provides a magnetic levitation bearing stator assembly and a magnetic levitation motor having the same, so as to solve the problem that the internal parts of the stator assembly are not securely fixed.

In one aspect of the present application, a magnetic suspension bearing stator assembly is provided. The magnetic suspension bearing stator assembly includes: a magnetically permeable ring, a permanent magnet, a radial ring and an iron core, and the magnetically permeable ring and the permanent magnet are located on one side of the radial ring, The iron core part is arranged in the radial ring, a plastic sealing cavity is formed between the magnetic conducting ring, the permanent magnet, the radial ring and the iron core, the middle of the iron core has an escape hole, the plastic sealing cavity is located on the outer periphery of the escape hole, and the plastic sealing cavity is filled with Plastic sealant.

Optionally, the permanent magnet is located between the magnetic conducting ring and the radial ring, and plastic sealing glue is provided between the permanent magnet and the magnetic conducting ring and between the permanent magnet and the radial ring.

Optionally, the magnetic suspension bearing stator assembly further includes: a fixing frame, the permanent magnet is arranged on the fixing frame, and the fixing frame is fixed between the magnetic conducting ring and the radial ring by plastic sealing glue.

Optionally, the fixing frame is an annular structure, and has grooves in the circumferential direction corresponding to the shape and number of the permanent magnets. The permanent magnet is arranged in the groove, and the plastic sealant is arranged between the permanent magnet and the fixing frame.

Optionally, a plastic sealing compound is arranged between the magnetic conducting ring and the radial ring.

Optionally, a plastic sealant is arranged between the iron core and the radial ring.

Optionally, the magnetic suspension bearing stator assembly further includes: a coil, which is arranged on the iron core, and a plastic sealant is arranged between the coil and the iron core.

Optionally, the iron core has a coil slot and a through hole, the coil is arranged in the coil slot, and the coil slot and the through hole are filled with plastic sealant.

Optionally, the iron core has a first surface and a second surface disposed opposite to each other in the axial direction, and the plastic sealant penetrates the coil slot and the through hole and is disposed on the first surface and the second surface.

Optionally, the first surface and the second surface of the iron core, as well as the coil slot and the plastic sealant in the through hole form an integral structure, and the iron core and the coil are inlaid in the plastic sealant.

Optionally, the iron core includes a plurality of iron core units, and the plurality of iron core units are arranged in the radial ring at intervals along the circumferential direction, and are arranged between two adjacent iron core units and between the iron core unit and the radial ring. With plastic sealant.

Optionally, the material of the plastic sealant is epoxy resin.

In another aspect of the present application, a magnetic suspension motor is provided, and the magnetic suspension motor includes the magnetic suspension bearing stator assembly provided above.

Applying the technical solution of the present application, the magnetic suspension bearing stator assembly includes a magnetic conducting ring, a permanent magnet, a radial ring and an iron core, wherein a plastic sealing cavity is arranged between the magnetic conducting ring, the permanent magnet, the radial ring and the iron core, And pour the plastic sealing compound into the plastic sealing cavity to fix the magnetic conductive ring, the permanent magnet, the radial ring and the iron core together by the plastic sealing compound, so that the related parts can be connected and fixed by the plastic sealing compound, so the setting can improve the magnetic suspension. The stability between the internal parts of the bearing stator assembly prolongs the service life of the motor, and the above-mentioned process has a simple structure and is easy to process.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 shows a front view of a magnetic bearing stator assembly provided according to the related art.

FIG. 2 shows a cross-sectional view along line A-A of FIG. 1 .

FIG. 3 shows an exploded view of a magnetic suspension bearing stator assembly provided according to an embodiment of the present application.

FIG. 4 shows a front view of a magnetic suspension bearing stator assembly provided according to an embodiment of the present application.

FIG. 5 shows a cross-sectional view along the line B-B in FIG. 4 .

FIG. 6 shows a cross-sectional view taken along line C-C in FIG. 4 .

FIG. 7 shows an exploded view of a magnetic suspension bearing stator assembly provided according to yet another embodiment of the present application.

Wherein, the above-mentioned drawings include the following reference signs: 1, magnetic conductive ring; 2, permanent magnet; 3, coil; 4, radial ring; 5, iron core; 10, magnetic conductive ring; 20, permanent magnet; 30, Radial ring; 40, iron core; 41, avoidance hole; 42, coil slot; 43, through hole; 44, iron core unit; 50, plastic sealant; 60, fixing frame; 70, coil.

Detailed ways

In order to make the above objects, features and advantages of the present disclosure more clearly understood, the specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present disclosure. Therefore, the present disclosure is not limited by the specific embodiments disclosed below.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are for the purpose of describing specific embodiments only, and are not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Furthermore, the figures are not drawn to a 1:1 scale and the relative dimensions of elements in the figures are drawn by way of example only and not necessarily to true scale.

As shown in FIG. 3 to FIG. 6 , an embodiment of the present application provides a magnetic suspension bearing stator assembly. The magnetic suspension bearing stator assembly includes a magnetically conductive ring 10 , a permanent magnet 20 , a radial ring 30 and an iron core 40 . In the axial direction of the stator assembly, the magnetic permeable ring 10 and the permanent magnets 20 are located on one side of the radial ring 30 . The iron core 40 is partially disposed in the radial ring 30 , and in the axial direction of the stator assembly, the iron core 40 is located on the other side of the radial ring 30 . The permanent magnet 20 , the magnetic conducting ring 10 , the radial ring 30 and the iron core 40 are coaxially arranged. A plastic sealing cavity is formed between the magnetic conducting ring 10 , the permanent magnet 20 , the radial ring 30 and the iron core 40 . The iron core 40 has an escape hole 41 in the middle, and the escape hole 41 is used for passing the rotor. The plastic sealing cavity is located at the outer periphery of the avoidance hole 41 , and the plastic sealing cavity is filled with the plastic sealing compound 50 . More specifically, the avoidance hole 41 runs through the entire stator assembly, and the plastic sealing cavity is jointly defined by the avoidance hole 41 , the magnetic conducting ring 10 , the permanent magnet 20 , the radial ring 30 and the iron core 40 . Through the above structure, the use of the plastic sealant 50 can play a good role in fixing the various components of the stator assembly, strengthen the connection between the various components, and avoid shaking or connection failure during use.

Through the technical solutions provided in the present application, the magnetic suspension bearing stator assembly includes a magnetic conductive ring 10 , a permanent magnet 20 , a radial ring 30 and an iron core 40 . Among them, a plastic sealing cavity is arranged between the magnetic conductive ring 10 , the permanent magnet 20 , the radial ring 30 and the iron core 40 , and a plastic sealing compound 50 is poured into the plastic sealing cavity, so that the magnetic conductive ring 10 , the permanent magnet can be sealed by the plastic sealing compound 50 . 20. The radial ring 30 and the iron core 40 are fixed together, so that the related components can be connected and fixed by the plastic sealant 50. This arrangement can improve the stability of the internal components of the stator assembly and prolong the service life of the motor. , and the above-mentioned process structure is simple and easy to process.

The plastic sealant 50 can be made of epoxy resin material, which has insulating properties, heat resistance and corrosion resistance, and good thermal conductivity, which can improve the overall heat dissipation performance of the stator assembly while fixing the components, and ensure the normal operation of the electrodes.

Specifically, in the axial direction of the stator assembly, the permanent magnet 20 is located between the magnetic conducting ring 10 and the radial ring 30 . More specifically, the permanent magnets 20 are sandwiched between the magnetic conducting ring 10 and the radial ring 30 . In one embodiment, a plastic sealant 50 is disposed between the permanent magnet 20 and the magnetic conducting ring 10 and between the permanent magnet 20 and the radial ring 30 . In this way, the permanent magnet 20 can be stabilized between the magnetic conducting ring 10 and the radial ring 30 . Through the above-mentioned fixing method, it is possible to eliminate the need for adding a fixing frame to fix the permanent magnet 20 in the related design, which can simplify the structure while fixing the permanent magnet.

Of course, a fixing frame 60 can also be added to the stator assembly, and the position of the permanent magnet 20 on the magnetic conducting ring 10 and the radial ring 30 can be positioned and fixed by the fixing frame 60 . Specifically, the permanent magnet 20 is arranged on the fixing frame 60 , and the fixing frame 60 is fixed between the magnetic conducting ring 10 and the radial ring 30 through the plastic sealing glue 50 . In this way, the permanent magnet 20 can be quickly positioned, so that the permanent magnet 20 , the magnetic conducting ring 10 and the radial ring 30 are coaxially arranged, and the fixing effect of the permanent magnet 20 can be strengthened, and the stability of the permanent magnet 20 can be further improved. In one embodiment, the fixing frame 60 is an annular structure, and has grooves corresponding to the shape and number of the permanent magnets 20 in the circumferential direction. The permanent magnets 20 are arranged in the grooves to achieve positioning and fixing. The permanent magnet 20 and the fixing frame 60 are arranged on the same plane, that is, the positions in the axial direction of the stator assembly are the same. The plastic sealant ( 50 ) may be disposed between the permanent magnet 20 and the fixing frame 60 .

In one embodiment, a plastic sealing compound 50 is also arranged between the magnetic conductive ring 10 and the radial ring 30, so that the magnetic sealing compound 50 can be used to directly fix the magnetic conductive ring 10 and the radial ring 30, so that the two can be stabilized. Together, the magnetic permeable ring 10 , the permanent magnets 20 and the radial ring 30 are formed into an integral structure by using the plastic sealant 50 . Compared with the method in which the magnetic permeable ring 10 and the radial ring 30 are only bonded together by the permanent magnet 20 in the related art, the fixing effect and stability thereof are better.

In one embodiment, a plastic sealant 50 is also disposed 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 related design in which the iron core 40 and the radial ring 30 are fixed by interference fit, the processing is convenient and the processing efficiency is higher. It is more firmly fixed with the radial ring 30 .

Optionally, the magnetic suspension bearing stator assembly further includes a coil 70 . The coil 70 is provided on the iron core 40 . A plastic sealant 50 is disposed between the coil 70 and the iron core 40 . The coil 70 can be fixed by providing the plastic sealant 50 . In addition, the plastic encapsulant 50 can fully penetrate between the wires of the coil 70, so that the air existing between the wires of the original coil is replaced with solid colloid, which can enhance the insulating ability of the coil 70 and prevent the insulating layer on the surface of the coil 70 from being struck. wear, while greatly improving the thermal conductivity and enhancing the heat dissipation capacity.

In one embodiment, the iron core 40 has a coil slot 42 and a through hole 43 . The coil 70 is disposed within the coil slot 42 . Filling the coil slot 42 and the through hole 43 with the plastic sealing compound 50 can plastic-encapsulate the entire stator assembly, which can further improve the fixing effect and make the internal components an integral structure.

5 and 6 show a cross-sectional view at the coil slot 42 and a cross-sectional view at the through hole 43, respectively. In this embodiment, the iron core 40 has a first surface and a second surface disposed opposite to each other in the axial direction, and the plastic sealant 50 penetrates the coil slot 42 and the through hole 43 and is disposed on the first surface and the second surface. In this way, the iron core 40 and the coil 70 can be clamped by the inner and outer plastic sealants 50, so as to further improve the fixing effect. The first surface and the second surface of the iron core 40 and the plastic sealant 50 in the coil slot 42 and the through hole 43 form an integral structure, and the iron core 40 and the coil 70 are embedded in the plastic sealant 50 .

Through the technical solution provided in this application, the stator assembly is fixed with plastic sealant 50, which improves the overall structural strength and shock resistance, increases the reliability of the system, and enhances the electrical safety performance of the coil, enabling it to work in harsher conditions. environment; make the stator assembly as a whole, enhance the overall heat dissipation performance; reduce the number of parts and reduce the processing cost.

In another embodiment provided by the present application, as shown in FIG. 7 , the iron core 40 includes a plurality of iron core units 44 . A plurality of iron core units 44 are arranged in the radial ring 30 at intervals along the circumferential direction, and together constitute the iron core 40 . A plastic sealant 50 is provided between two adjacent iron core units 44 and between the iron core units 44 and the radial ring 30 . The plurality of core units 44 and the coils 70 are embedded in the plastic sealant 50 . The iron core 40 is fixed by the plastic sealant 50 , so that the iron core 40 can be divided into several independent iron core units 44 , and it is not necessary to make the iron core 40 into an integral structure, thus diversifying the structure of the iron core 40 . In this embodiment, the iron 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 filling of the plastic sealant is completed according to the aforementioned scheme. This arrangement can facilitate the realization of mechanical automatic winding; The mold opening size of the iron core is reduced, and the mold opening cost is reduced; in addition, the iron core 40 and the radial ring 30 can be assembled by using a clearance fit, which can eliminate the hot charging process and reduce the difficulty of assembly.

In another embodiment provided by the present application, a magnetic levitation motor is provided, and the magnetic levitation motor includes the magnetic levitation bearing stator assembly provided in the above embodiment.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

Claims

A magnetic suspension bearing stator assembly, characterized in that the magnetic suspension bearing stator assembly comprises:

A magnetic conductive ring (10), a permanent magnet (20), a radial ring (30) and an iron core (40), the magnetic conductive ring (10) and the permanent magnet (20) are located on the radial ring (30) On one side, the iron core (40) is partially arranged in the radial ring (30), the magnetic conducting ring (10), the permanent magnet (20), the radial ring (30) and the A plastic sealing cavity is formed between the iron cores (40), an escape hole (41) is provided in the middle of the iron core (40), the plastic sealing cavity is located on the outer periphery of the escape hole (41), and the plastic sealing cavity is filled with Plastic sealant (50).
The magnetic suspension bearing stator assembly according to claim 1, wherein the permanent magnet (20) is located between the magnetic conducting ring (10) and the radial ring (30), and the permanent magnet (20) ) and the magnetic conducting ring (10), and between the permanent magnet (20) and the radial ring (30), the plastic sealing compound (50) is arranged.
The magnetic bearing stator assembly of claim 1, further comprising:

A fixing frame (60), the permanent magnet (20) is arranged on the fixing frame (60), and the fixing frame (60) is fixed on the magnetic conducting ring (10) and the magnetic conducting ring (10) and the between the radial rings (30).
The magnetic suspension bearing stator assembly according to claim 3, characterized in that, the fixing frame (60) is an annular structure, and has grooves in the circumferential direction corresponding to the shape and number of the permanent magnets (20). The permanent magnet (20) is arranged in the groove, and the plastic sealant (50) is arranged between the permanent magnet (20) and the fixing frame (60).
The magnetic suspension bearing stator assembly according to claim 1, wherein the plastic sealant (50) is provided between the magnetic conducting ring (10) and the radial ring (30).
The magnetic suspension bearing stator assembly according to claim 1, wherein the plastic sealing compound (50) is provided between the iron core (40) and the radial ring (30).
The magnetic bearing stator assembly of claim 1, further comprising:

A coil (70) is arranged on the iron core (40), and the plastic sealing compound (50) is arranged between the coil (70) and the iron core (40).
The magnetic suspension bearing stator assembly according to claim 1, wherein the iron core (40) has a coil slot (42) and a through hole (43), and the coil (70) is arranged in the coil slot (42) ), the coil slot (42) and the through hole (43) are filled with the plastic sealant (50).
The magnetic suspension bearing stator assembly according to claim 8, characterized in that, the iron core (40) has a first surface and a second surface opposite to each other in the axial direction, and the plastic sealant (50) penetrates through the coil slot (42) and the through hole (43) are provided on the first surface and the second surface.
The magnetic suspension bearing stator assembly according to claim 9, wherein the first surface and the second surface of the iron core (40), and the coil slot (42) and the through hole ( The plastic sealant (50) in 43) forms an integrated structure, and the iron core (40) and the coil (70) are embedded in the plastic sealant (50).
The magnetic suspension bearing stator assembly according to claim 1, wherein the iron core (40) comprises a plurality of iron core units (44), and the plurality of the iron core units (44) are arranged at intervals in the circumferential direction. In the radial ring (30), the plastic sealing compound is arranged between two adjacent iron core units (44) and between the iron core unit (44) and the radial ring (30). (50).
The magnetic suspension bearing stator assembly according to any one of claims 1 to 11, characterized in that, the material of the plastic sealant (50) is epoxy resin.
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 12.