CN114922906A

CN114922906A - Spliced stator structure and axial magnetic suspension bearing

Info

Publication number: CN114922906A
Application number: CN202210646181.XA
Authority: CN
Inventors: 曹俊辉; 伍尚权; 林学明; 郑克强; 王周叶; 袁清磊
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Kaibang Motor Manufacture Co Ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-08-19
Anticipated expiration: 2042-06-08
Also published as: CN114922906B

Abstract

The invention relates to a spliced stator structure and an axial magnetic suspension bearing, wherein the stator structure comprises: a coil assembly; the stator core is formed by splicing annular outer magnetic pole blocks, annular inner magnetic pole blocks and stop connecting blocks, the inner magnetic pole blocks are coaxially arranged in the outer magnetic pole blocks, and the stop connecting blocks are suitable for being connected to one ends of the outer magnetic pole blocks and one ends of the inner magnetic pole blocks in a blocking mode; one end of the inner magnetic pole block and/or one end of the outer magnetic pole block are/is provided with a limiting flange suitable for limiting and resisting the coil assembly, one end of the coil assembly is propped against the limiting flange, and the other end of the coil assembly is limited and fixed in an annular mounting space formed between the outer magnetic pole block and the inner magnetic pole block under the stopping effect of the stopping connecting block. The stator core adopts the splicing type structural design, can be spliced to obtain the bearing stator structures with different sizes and output according to the actual assembly requirement and the output requirement, and has high universality and low scrap cost. In addition, the coil can be assembled without screws, the assembly mode of the coil is simplified, and the scrapping risk of the coil framework is reduced.

Description

Spliced stator structure and axial magnetic suspension bearing

Technical Field

The invention relates to the technical field of magnetic suspension bearings, in particular to a spliced stator structure and an axial magnetic suspension bearing.

Background

Magnetic bearings can be classified into active magnetic bearings, passive magnetic bearings, and hybrid magnetic bearings according to the type of magnetic force provided. Because of its simple structure and stable output, most of the existing magnetic bearings adopt active magnetic bearings. As shown in fig. 1, the stator core 1 'of the existing active magnetic bearing is generally designed as an integrated structure, and the integrally processed stator core 1' mainly has the following defects: each type of iron core can only correspond to one type of bearing system, and for the bearing systems with different assembly sizes and output requirements, the stator iron core 1' needs to be redesigned, so that the universality is poor; and the assembly of the coil framework 2 ' needs to be fixed by the screw 3 ', and the phenomenon of high rejection rate of the coil framework 2 ' caused by the sliding of the screw 3 ' in the locking process of the screw 3 ' is easy to occur.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects that in the prior art, the magnetic bearing adopts the stator core arranged in an integrated structure, the stator core needs to be redesigned for different sizes and output requirements, the universality is poor, and the screw is adopted to fix the coil, so that the screw thread slipping is easy to occur, and the rejection rate of the coil framework is high, so that the spliced stator structure and the axial magnetic suspension bearing with high universality and low rejection rate are provided.

To solve the above problem, in a first aspect, the present invention provides a spliced stator structure comprising:

a coil assembly;

the stator core is formed by splicing annular outer magnetic pole blocks, annular inner magnetic pole blocks and stop connecting blocks, the inner magnetic pole blocks are coaxially arranged in the outer magnetic pole blocks, an annular mounting space suitable for accommodating the coil assembly is formed between the outer magnetic pole blocks and the inner magnetic pole blocks, and the stop connecting blocks are suitable for being connected to one ends of the outer magnetic pole blocks and the inner magnetic pole blocks in a blocking mode;

one end of the inner magnetic pole block and/or one end of the outer magnetic pole block are/is provided with a limiting flange which is suitable for limiting and resisting the coil assembly, one end of the coil assembly is propped against the limiting flange, and the other end of the coil assembly is limited and fixed in the annular mounting space under the stopping effect of the stopping connecting block.

Optionally, the outer magnetic pole block is an annular member with an L-shaped cross section, and the inner magnetic pole block is a cylindrical member;

the outer magnetic pole piece comprises a first annular side wall and a second annular side wall which are connected in an L shape, wherein: the annular mounting space is formed between the first annular side wall and the inner magnetic pole block, and the second annular side wall forms the limiting flange.

Optionally, the stopper connecting block comprises:

the annular connecting part is suitable for being connected to the end wall of one side, far away from the limiting flange, of the outer magnetic pole block and the inner magnetic pole block in a sealing mode;

and the annular stopping part is arranged on one side of the annular connecting part and is suitable for extending into the annular mounting space to be matched with the coil assembly in a stopping way.

Optionally, a radial width of the annular stop portion matches a distance between the outer magnetic pole block and the inner magnetic pole block, an outer diameter of the annular connecting portion matches an outer diameter of the outer magnetic pole block, and an inner diameter of the annular connecting portion matches an inner diameter of the inner magnetic pole block.

Optionally, the stop connecting block can be formed by splicing a plurality of sub-connecting blocks in a radial direction in an overlapping manner;

the sub-connecting blocks are of an annular structure, and the plurality of annular sub-connecting blocks are overlapped and spliced together to form an annular stop connecting block with a T-shaped section.

Optionally, the sub-connecting block comprises a splicing connecting part and a splicing stopping part which are used for splicing and forming the annular connecting part and the annular stopping part;

the sub-connecting block at least comprises the following components which are matched with each other:

the splicing stopping part of the first sub-connecting block is connected to the middle position of the splicing connecting part in a T shape;

and the splicing stopping part and the splicing connecting part of the second sub-connecting block are arranged in a Z-shaped staggered and superposed manner.

Optionally, the stop connecting block comprises a first sub-connecting block arranged on the side close to the outer magnetic pole block and one or more second sub-connecting blocks sequentially overlapped on the first sub-connecting block from outside to inside along the radial direction;

or the stop connecting block comprises a first sub-connecting block arranged at the side close to the inner magnetic pole block and one or more second sub-connecting blocks sequentially overlapped from inside to outside along the radial direction on the basis of the first sub-connecting block.

Optionally, the stator structure further comprises:

and the annular magnetic diffusion modules are arranged on the inner periphery of the inner magnetic pole block and/or the outer periphery of the outer magnetic pole module and/or the outer end face of the stop connecting block and are suitable for increasing the magnetic pole area of the stator core.

Optionally, the outer magnetic pole block, the inner magnetic pole block, the stop connecting block and the magnetism expansion module are all made of silicon steel sheets;

and/or the stop connecting block is fixedly connected with the outer magnetic pole block and the inner magnetic pole block respectively in a screw and/or bonding mode.

In a second aspect, the invention also provides an axial magnetic suspension bearing, which comprises the spliced stator structure.

The invention has the following advantages:

1. according to the stator structure provided by the embodiment of the invention, the stator core adopts the splicing type structural design, and each splicing part of the splicing type stator core is one part of the whole structure, so that the bearing stator structures with different sizes and forces can be spliced according to the actual assembly requirements and the force output requirements, and the universality of the stator core is improved. And compare in the stator core that the integration set up, by the stator core that a plurality of concatenation components concatenation formed, every concatenation component simple structure of it, the preparation is efficient, can reduce the whole condemned risk of iron core and the cost of scrapping that the processing is bad to lead to effectively simultaneously.

2. According to the stator structure provided by the embodiment of the invention, one end of the coil assembly abuts against the limiting flange through the limiting flange arranged at one end of the inner magnetic pole block and/or one end of the outer magnetic pole block during assembly, and the other end of the coil assembly is limited and fixed in the annular mounting space under the stopping effect of the stopping connecting block, so that the assembly of the coil without screws can be realized, the assembly mode of the coil is simplified, the scrapping risk of a coil framework is reduced, and the stability of the whole coil assembly is higher.

3. The stop connecting block provided by the embodiment of the invention comprises an annular connecting part and an annular stop part, wherein the annular connecting part is suitable for being connected to the end wall of one side, away from the limiting flange, of the outer magnetic pole block and the inner magnetic pole block in a blocking mode, the annular stop part is arranged on one side of the annular connecting part and is suitable for extending into the annular mounting space and matched with the coil assembly in a stop mode, and therefore the stop connecting block can be used for connecting the outer magnetic pole block and the inner magnetic pole block to splice to obtain a stator core whole body and can be matched with the coil assembly in a stop mode to stably and reliably fix the coil assembly in the stator core.

4. In the embodiment of the invention, the stop connecting block can be formed by overlapping and splicing a plurality of sub-connecting blocks in the radial direction, one or more second sub-connecting blocks are added at the inner diameter of the first sub-connecting block to reduce the inner diameter of the stator core or one or more second sub-connecting blocks are added at the outer diameter of the first sub-connecting block to increase the outer diameter of the stator core according to the size of the assembly space of the inner diameter and the outer diameter of the bearing in the assembly process, so that the radial width of the whole stop connecting block is adjusted by continuously overlapping the second sub-connecting blocks, the inner diameter and the outer diameter of the stator core are adjusted, and the requirement of the inner diameter and the outer diameter during actual assembly is met.

5. In the embodiment of the invention, the magnetic expansion modules can be added on the inner periphery of the inner magnetic pole block and/or the outer periphery of the outer magnetic pole module and/or the outer end face of the stopping connecting block according to the requirement of assembling the magnetic pole area of the integral axial bearing, so that the magnetic pole area of the stator core is increased by adding the magnetic expansion modules, and different requirements are met. In addition, interior magnetic pole piece, connecting block, the magnetism module that expands all adopt the silicon steel sheet preparation to form in this application, reducible bearing is at the eddy current loss of operation process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic cross-sectional view illustrating the assembly of a bearing stator core and coils in the prior art;

fig. 2 is a schematic sectional view showing the assembly of the stator core and the coil in the present embodiment;

fig. 3 shows a cross-sectional view of an outer pole piece in the present embodiment;

fig. 4 shows a top view of the outer pole piece in this embodiment;

fig. 5 shows a cross-sectional view of an inner pole piece in this embodiment;

FIG. 6 shows a top view of an inner pole piece in this embodiment;

FIG. 7 shows a cross-sectional view of the stop connecting block/first sub-connecting block of the present embodiment;

FIG. 8 shows a top view of the stop connection block/first sub-connection block of the present embodiment;

FIG. 9 shows an assembly view of one embodiment of the present embodiment in which a second sub-connector block is superimposed on the inner diameter of a first sub-connector block;

FIG. 10 shows an assembly view of one embodiment of the present embodiment in which a second sub-connector block is superimposed on the outer diameter of a first sub-connector block;

fig. 11 is a sectional view showing a second sub-connector block in the present embodiment;

fig. 12 is a plan view showing a second sub-connector block in the present embodiment;

fig. 13 is a schematic structural cross-sectional view illustrating an embodiment of a stator core-added magnetism expansion module according to the present embodiment;

fig. 14 shows a cross-sectional view of the first/second magnetism diffusion module in the present embodiment;

fig. 15 shows a top view of the first/second flux spreading module in this embodiment;

fig. 16 shows a cross-sectional view of a third magnetism diffusing module in the present embodiment;

fig. 17 shows a top view of a third magnetism spreading module in the present embodiment;

description of reference numerals:

1. a stator core;

11. an outer magnetic pole piece; 111. a limiting flange;

12. an inner magnetic pole block;

13. a stop connecting block; 13a, an annular connecting part; 13b, an annular stop; 131. a first sub-connecting block; 132. a second sub-connecting block;

2. a coil assembly;

3. a magnetism expanding module; 31. a first magnetism expansion module; 32. a second magnetism expanding module; 33. a third magnetism expanding module;

1', a stator core; 2', a coil skeleton; 3', and a screw.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example one

As shown in fig. 2 to 17, the present embodiment provides a spliced stator structure, where the stator structure includes a coil assembly 2 and a stator core 1, and the coil assembly 2 includes a bobbin and a coil wound on the bobbin. The stator core 1 is formed by splicing annular outer magnetic pole blocks 11, annular inner magnetic pole blocks 12 and stop connecting blocks 13, the inner magnetic pole blocks 12 are coaxially arranged in the outer magnetic pole blocks 11, an annular mounting space suitable for accommodating the coil assembly 2 is formed between the outer magnetic pole blocks 11 and the inner magnetic pole blocks 12, and the stop connecting blocks 13 are suitable for being connected to one ends of the outer magnetic pole blocks 11 and one ends of the inner magnetic pole blocks 12 in a sealing mode.

The stator structure that this embodiment provided, stator core 1 is through the structural design who adopts the concatenation formula, and 1 each concatenation parts of stator core of concatenation formula are overall structure's partly to can splice according to actual demand and obtain the axial bearing of different forces of exerting oneself, improve 1 commonality of stator core. Compare in the stator core 1 that the integration set up moreover, by stator core 1 that a plurality of piecing components concatenation formed, every piecing components simple structure of it, the preparation is efficient, can reduce the whole condemned risk of iron core and the cost of scrapping that the processing is bad to lead to simultaneously effectively.

Further, as shown in fig. 2 to 4, one end of the inner magnetic pole block 12 and/or one end of the outer magnetic pole block 11 are/is provided with a limit flange 111 adapted to limit and abut against the coil assembly 2, one end of the coil assembly 2 abuts against the limit flange 111, and the other end of the coil assembly is limited and fixed in the annular mounting space under the stopping effect of the stop connecting block 13.

According to the stator structure provided by the embodiment, one end of the coil assembly 2 abuts against the limiting flange 111 through the limiting flange 111 arranged at one end of the inner magnetic pole block 12 and/or one end of the outer magnetic pole block 11 during assembly, and the other end of the coil assembly is limited and fixed in the annular mounting space under the stopping effect of the stopping connecting block 13, so that the assembly of the coil without screws can be realized, the assembly mode of the coil is simplified, the scrapping risk of a coil frame is reduced, and the stability of the whole coil assembly 2 is higher.

Alternatively, in this embodiment, the limiting flange 111 may be disposed on the outer periphery of the inner magnetic pole block 12, or the inner periphery of the outer magnetic pole block 11, or the limiting flange 111 may be disposed on both the outer periphery of the inner magnetic pole block 12 and the inner periphery of the outer magnetic pole block 11, so as to limit and fix the coil assembly 2.

Alternatively, in this embodiment, the limiting flange 111 may be an annular flange disposed on the outer periphery of the inner magnetic pole block 12 or the inner periphery of the outer magnetic pole block 11, or may also be a plurality of protruding structures disposed at intervals along the outer peripheral wall of the inner magnetic pole block 12 or the inner peripheral wall of the outer magnetic pole block 11.

Optionally, in this embodiment, the outer magnetic pole block 11 is an annular member with an L-shaped cross section, and the inner magnetic pole block 12 is a cylindrical member; the outer magnetic pole piece 11 includes a first annular sidewall and a second annular sidewall connected in an L-shape, wherein: the annular mounting space is formed between the first annular side wall and the inner pole piece 12, and the second annular side wall constitutes the limit flange 111.

In this embodiment, the outer magnetic pole piece 11 is an integrated annular member with an approximately L-shaped cross section formed by machining, so that one annular side wall of the outer magnetic pole piece 11 can form the limiting flange 111, a connection step between the limiting flange 111 and the outer magnetic pole piece 11 is omitted, the assembly process is simplified, and the structural stability of the limiting flange 111 can be improved.

Optionally, the stop connecting block 13 is a ring-shaped sheet structure with a certain thickness, the stop connecting block 13 includes an annular connecting portion 13a and an annular stopping portion 13b, and the annular connecting portion 13a is adapted to be in blocking connection with end walls of one side of the outer magnetic pole block 11 and the inner magnetic pole block 12 away from the limit flange 111; the annular stopping portion 13b is arranged on one side of the annular connecting portion 13a and is suitable for extending into the annular mounting space to be matched with the coil assembly 2 in a stopping mode. By adopting the design, the stop connecting block 13 can be connected with the outer magnetic pole block 11 and the inner magnetic pole block 12 to splice to obtain a whole stator core 1, and can be matched with the stop of the coil assembly 2 to stably and reliably fix the coil assembly 2 in the stator core 1.

Optionally, the radial width of the annular stop 13b matches the distance between the outer magnetic pole piece 11 and the inner magnetic pole piece 12, more precisely, the radial width of the annular stop 13b is equal to or slightly smaller than the distance between the inner circumferential wall of the outer magnetic pole piece 11 and the outer circumferential wall of the inner magnetic pole piece 12.

The outer diameter of the annular connecting portion 13a is matched with the outer diameter of the outer magnetic pole blocks 11, the inner diameter of the annular connecting portion 13a is matched with the inner diameter of the inner magnetic pole blocks 12, and the annular connecting portion 13a is designed to be connected to the end wall of one side, far away from the limiting flange 111, of the outer magnetic pole blocks 11 and the inner magnetic pole blocks 12 in a sealing mode just, so that the integrity of the stator core 1 is improved.

Optionally, in this embodiment, the stop connecting block 13 is connected and fixed to the outer magnetic pole block 11 and the inner magnetic pole block 12 by screws and/or adhesion. In this embodiment, the stator core 1 is formed by splicing the stop connecting block 13, the outer magnetic pole block 11 and the inner magnetic pole block 12, so that each component can be assembled after being processed, and thus, even if the scrapping phenomenon caused by poor processing occurs in the manufacturing process of a certain component, other components cannot be interfered, and the problem of high scrapping cost caused by integral scrapping is avoided.

Alternatively, in this embodiment, as shown in fig. 2, 7 and 8, the stop connecting block 13 is an annular member with a T-shaped cross section, and the T-shaped stop connecting block 13 includes a first annular wall horizontally disposed and a second annular wall vertically connected to a middle position of the first annular wall, where the first annular wall constitutes the annular connecting portion 13a, and the second annular wall constitutes the annular stopping portion 13 b.

Alternatively, in the present embodiment, the thicknesses, that is, the lengths in the axial direction, of the annular stopper portion 13b and the annular connecting portion 13a are the same.

Optionally, in this embodiment, the stop connecting block 13 may be formed by splicing a plurality of sub-connecting blocks in an overlapping manner in the radial direction; the sub-connecting blocks are of an annular structure, and a plurality of annular sub-connecting blocks are overlapped and spliced together to form an annular stop connecting block 13 with a T-shaped section.

Alternatively, as shown in fig. 2, 7 to 12, the sub-connecting block includes a splicing connecting portion and a splicing stopper portion for splicing and forming the annular connecting portion 13a and the annular stopper portion 13 b; the sub-connecting blocks at least comprise a first sub-connecting block 131 and a second sub-connecting block 132 which are matched with each other, and a splicing stopping part of the first sub-connecting block 131 is connected to the middle position of the splicing connecting part in a T shape; the splicing stopping part and the splicing connecting part of the second sub-connecting block 132 are arranged in a Z-shaped staggered and superposed mode.

In the above-mentioned solution, the first sub-connection block 131 is a ring member having a T-shaped cross section, and the second sub-connection block 132 is a ring member having an approximate Z-shape, so that the second sub-connection block 132 can form a T-shaped ring member after being joined to the first sub-connection block 131.

Specifically, first sub-connecting block 131 is including personally submitting first sub-rampart wall and the second sub-rampart wall that T type is connected, and wherein the second sub-rampart wall is connected at the intermediate position of first sub-rampart wall, forms the L type ladder groove that sets up between first sub-rampart wall and the second sub-rampart wall, the second sub-rampart wall constitutes the concatenation backstop portion of first sub-connecting block 131, first sub-rampart wall constitutes the concatenation connecting portion of first sub-connecting block 131.

The second sub-link block 132 includes a third sub-ring wall and a fourth sub-ring wall, the fourth sub-ring wall is stacked over the third sub-ring wall, so as to form a downward L-shaped stepped groove between the fourth sub-ring wall and the third sub-ring wall, the fourth sub-ring wall constitutes a splicing stopper of the second sub-connecting block 132, the third sub-ring wall constitutes the joint connection portion of the second sub-connecting block 132, the fourth sub-ring wall has the same height as the second sub-ring wall, and the staggered part of the fourth sub-ring wall can be just matched and lapped in an L-shaped stepped groove formed between the first sub-ring wall and the second sub-ring wall, namely, the L-shaped stepped grooves of the second sub-connecting blocks 132 and the first sub-connecting blocks 131 are spliced and matched with each other, so that the second sub-connecting block 132 and the first sub-connecting block 131 can be stacked to form an L-shaped ring member.

It should be noted that, the widths of the third sub-ring wall and the fourth sub-ring wall in the radial direction are the same or may be different, as long as it is ensured that the staggered portion of the fourth sub-ring wall can be matched with the L-shaped stepped groove of the first sub-connecting block 131, and the second sub-connecting block 132 can still form an annular member that is T-shaped as a whole after being spliced with the first sub-connecting block 131.

Alternatively, in this embodiment, as shown in fig. 2 and 9, the stopper connection block 13 includes a first sub-connection block 131 disposed at a side close to the outer magnetic pole block 11 and one or more second sub-connection blocks 132 sequentially stacked from outside to inside in a radial direction on the basis of the first sub-connection block 131; alternatively, as shown in fig. 2 and 10, the stopper link block 13 includes a first sub-link block 131 disposed at a side close to the inner pole block 12 and one or more second sub-link blocks 132 sequentially stacked from the inside to the outside in a radial direction on the basis of the first sub-link block 131. The first sub-connecting block 131 and one or more second sub-connecting blocks 132 stacked thereon together form the stopper connecting block 13.

In this embodiment backstop connecting block 13 can be overlapped the concatenation by polylith sub-connecting block on the radial direction and constitute, in the assembling process, can be according to the size in the bearing inside and outside footpath fitting space, increase one or more second sub-connecting block 132 in first sub-connecting block 131 internal diameter department and reduce 1 internal diameter of stator core, or increase one or more second sub-connecting block 132 in first sub-connecting block 131 external diameter department and increase 1 external diameter of stator core, thereby realize adjusting whole backstop connecting block 13's radial width through constantly stacking second sub-connecting block 132, and then adjust 1 inside and outside footpath of stator core, inside and outside footpath when satisfying actual assembly demand.

In this embodiment, the specific assembly process of the stator core 1 for adjusting the inner and outer diameters of the stator core 1 by overlapping the second sub-connecting block 132 on the first sub-connecting block 131 is as follows:

in this embodiment, the first sub-connecting block 131, the inner magnetic pole block 12, and the outer magnetic pole block 11 may be assembled to form a basic stator structure by, for example, screw locking, structural adhesive bonding, and the like, and the coil assembly 2 is placed in the annular mounting groove formed by the inner magnetic pole block 12, the first sub-connecting block 131, and the outer magnetic pole block 11. It is possible to reduce the inner diameter of the stator core 1 and increase the installation space of the coil assembly 2 by adding the second sub-connection block 132 at the inner diameter of the first sub-connection block 131, as shown in fig. 9. In the same way, the second sub-connecting block 132 may be added at the outer diameter of the first sub-connecting block 131 to increase the installation space of the coil assembly 2 and the outer diameter of the stator core 1, as shown in fig. 10, so that the requirement of the inner diameter and the outer diameter in actual assembly can be met by continuously increasing the radial width of the stop connecting block 13.

Certainly also can satisfy the inside and outside diameter demand of actual assembly through reducing the radial width of backstop connecting block 13, if bearing internal diameter fitting space undersize, then the internal diameter increase of stator core 1 is realized to backstop connecting block 13 that the radial width is little through changing. In a similar way, when the assembly space of the outer diameter of the bearing is too small, the reduction of the outer diameter of the stator core 1 can be realized by replacing the stop connecting block 13 with a small radial width, and the sizes of the inner diameter and the outer diameter of the bearing core can be continuously changed by analogy so as to adapt to various requirements.

Optionally, as shown in fig. 2, 13 to 17, the stator structure in this embodiment further includes a ring-shaped magnetism diffusion module 3, and the magnetism diffusion module 3 is disposed on the inner circumference of the inner magnetic pole block 12 and/or the outer circumference of the outer magnetic pole block and/or the outer end face of the stopper connecting block 13, and is adapted to increase the magnetic pole area of the stator core 1.

In this embodiment, the magnetism spreading modules 3 may be added to the inner circumference of the inner magnetic pole block 12 and/or the outer circumference of the outer magnetic pole module and/or the outer end face of the stopper connecting block 13 according to the requirement of assembling the magnetic pole area of the integral axial bearing, so as to increase the magnetic pole area of the stator core 1 by adding the magnetism spreading modules 3, so as to meet different requirements.

Specifically, the magnetism diffusion module 3 includes a first magnetism diffusion module 31 disposed on the inner periphery of the inner magnetic pole block 12, and a second magnetism diffusion module 32 disposed on the outer periphery of the outer magnetic pole block 11. Optionally, the magnetism spreading module 3 further includes a third magnetism spreading module 33 disposed on an end surface of the stop connection block 13 on a side away from the coil assembly 2, and whether the first magnetism spreading module 31, the third magnetism spreading module 33, and the second magnetism spreading module 32 are additionally added can be selected according to actual use requirements.

Optionally, the outer magnetic pole block 11, the inner magnetic pole block 12, the stop connecting block 13 and the magnetism spreading module 3 are all made of silicon steel sheets. Outer magnetic pole piece 11, interior magnetic pole piece 12, backstop connecting block 13, expand magnetism module 3 and all adopt the silicon steel sheet preparation to form in this application, reducible bearing is at the eddy current loss of operation process.

In this embodiment, the stop connecting block 13 is a ring-shaped part with a cross section similar to a Z-shape or a T-shape, and is formed by laminating silicon steel sheets, and the third magnetism spreading module 33 is a ring-shaped sheet structure formed by laminating silicon steel sheets. Interior magnetic pole piece 12, first magnet expansion module 31 and second magnet expansion module 32 are the ring form, all adopt the silicon steel sheet coiling to form, the silicon steel sheet of interior magnetic pole piece 12 only needs guarantee its h highly, thereby can change the iron core internal diameter that the minimum internal diameter of its coiling can make by L1 increase to L2, L2> L1 as required, and in the same way, magnet expansion module 3 also can change its internal and external diameter through this method.

In this embodiment, if the magnetic pole area of the integral axial bearing cannot meet the requirement, as shown in fig. 13, the magnetic pole area can be increased by adding the additional magnetism spreading module 3. In this embodiment, the magnetic diffusion modules 3 are respectively added outside the outer magnetic pole block 11, inside the inner magnetic pole block 12, and on the lower side of the stop connection block 13, and the specific assembling process is as follows:

first, the inside diameter of the magnetism increasing module 3 is set to a, the outside diameter is set to b, and the thickness (length in the axial direction) is set to c. As shown in fig. 13 to 15, an annular first magnetism expansion module 31 may be added inside the inner magnetic pole block 12 to increase the area of the inner magnetic pole, the inner magnetic pole block 12 is heated to expand and thermally sleeve on the first magnetism expansion module 31, and then cooled, so that the inner magnetic pole block 12 is shrunk and stably fixed on the first magnetism expansion module 31, thereby assembling the inner magnetic pole block 12 and the first magnetism expansion module 31. Wherein: the inner diameter a1 of the first magnetism spreading module 31 can be determined according to the requirement of enlarging the magnetic pole area, the outer diameter b1 is consistent with the inner diameter of the inner magnetic pole block 12, and the thickness c1 is the thickness of the inner magnetic pole h + the thickness of the annular connecting part 13 a. Alternatively, in this embodiment, the thickness of the annular connecting portion 13a is equal to half of the thickness H of the stopper connecting block 13, so that the c1 is H + 1/2H.

Further, the annular second magnetism diffusion block is added outside the outer magnetic pole block 11 to increase the area of the outer magnetic pole, and the second magnetism diffusion block 32 is heated to be sleeved on the outer magnetic pole block 11 in a heating mode, so that the outer magnetic pole block 11 and the second magnetism diffusion block 32 are assembled. Wherein: the inner diameter a2 of the second magnet enlarging block is consistent with the outer diameter of the outer magnetic pole block 11, the outer diameter b2 is determined according to the requirement of enlarging the magnetic pole area, and the thickness c2 is equal to the thickness of the outer magnetic pole block plus the thickness of the annular connecting part 13 a.

Further, as shown in fig. 13, 16 and 17, the third magnetism diffusion module 33 is added on the side surface of the lower end of the stop connection block 13 to increase the area of the magnetic pole, and the third magnetism diffusion module 33 can be assembled and connected with the stop connection block 13 through a screw. Specifically, the inner diameter a3 of the third magnetism diffusion module 33 is equal to the inner diameter a1 of the first magnetism diffusion module 31, the outer diameter b3 is equal to the outer diameter b2 of the second magnetism diffusion module 32, and the thickness c3 is determined according to the requirement of expanding the magnetic pole area.

In this embodiment, the magnetic expansion module 3 can be added at a suitable position according to the actual size of the assembly space, so as to increase the magnetic pole area and the output of the bearing core.

The spliced stator structure provided by the embodiment can realize the manufacture of bearing cores with different size assembly requirements and output requirements by increasing the number of the second sub-connecting blocks 132 and the magnet diffusion modules 3.

Example two

The embodiment also provides an axial magnetic suspension bearing, which comprises the spliced stator structure in the first embodiment.

The axial magnetic suspension bearing that this embodiment provided through adopting concatenation formula stator structure, can reduce the condemned expense cost of processing, also can make things convenient for the processing of accessories, satisfies different assembly size simultaneously and exerts the demand, and the commonality is high.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A spliced stator structure, comprising:

a coil assembly (2);

the stator core (1) is formed by splicing annular outer magnetic pole blocks (11), inner magnetic pole blocks (12) and a stop connecting block (13), the inner magnetic pole blocks (12) are coaxially arranged in the outer magnetic pole blocks (11), an annular mounting space suitable for accommodating a coil assembly (2) is formed between the outer magnetic pole blocks (11) and the inner magnetic pole blocks (12), and the stop connecting block (13) is suitable for being connected to one end of each of the outer magnetic pole blocks (11) and the inner magnetic pole blocks (12) in a blocking mode;

one end of the inner magnetic pole block (12) and/or one end of the outer magnetic pole block (11) are/is provided with a limiting flange (111) suitable for limiting and resisting the coil assembly (2), one end of the coil assembly (2) is propped against the limiting flange (111), and the other end of the coil assembly is limited and fixed in the annular mounting space under the stopping effect of the stopping connecting block (13).

2. Spliced stator structure according to claim 1, characterized in that the outer pole piece (11) is an annular member with an L-shaped cross-section, and the inner pole piece (12) is a cylindrical member;

the outer magnetic pole piece (11) comprises a first annular side wall and a second annular side wall which are connected in an L shape, wherein: the annular mounting space is formed between the first annular side wall and the inner magnetic pole block (12), and the second annular side wall forms the limiting flange (111).

3. Spliced stator structure according to claim 1, characterized in that the stop connection block (13) comprises:

the annular connecting part (13a) is suitable for being connected to the end wall, away from the limiting flange (111), of one side of the outer magnetic pole block (11) and the inner magnetic pole block (12) in a blocking mode;

and the annular stopping part (13b) is arranged on one side of the annular connecting part (13a) and is suitable for extending into the annular mounting space to be matched with the coil assembly (2) in a stopping way.

4. Spliced stator structure according to claim 3, characterized in that the radial width of the annular stop (13b) matches the spacing between the outer pole piece (11) and the inner pole piece (12), the outer diameter of the annular connection (13a) matches the outer diameter of the outer pole piece (11), and the inner diameter of the annular connection (13a) matches the inner diameter of the inner pole piece (12).

5. Spliced stator structure according to claim 3, characterized in that the stop connection block (13) is formed by splicing a plurality of sub-connection blocks in a radial direction in an overlapping manner;

the sub-connecting blocks are of an annular structure, and a plurality of annular sub-connecting blocks are overlapped and spliced together to form an annular stop connecting block (13) with a T-shaped section.

6. The spliced stator structure of claim 5, wherein the sub-connecting blocks comprise splicing connecting parts and splicing stopping parts for splicing and forming the annular connecting parts (13a) and the annular stopping parts (13 b);

the sub-connecting block at least comprises the following components matched with each other:

a first sub-connecting block (131), wherein a splicing stopping part of the first sub-connecting block (131) is connected to the middle position of the splicing connecting part in a T shape;

the splicing stopping part of the second sub-connecting block (132) and the splicing connecting part are arranged in a Z-shaped staggered and superposed mode.

7. The spliced stator structure according to claim 6, wherein the stopper connection block (13) includes a first sub-connection block (131) disposed at a side close to the outer magnetic pole block (11) and one or more second sub-connection blocks (132) sequentially stacked from outside to inside in a radial direction on the basis of the first sub-connection block (131);

or, the stopping connecting block (13) comprises a first sub connecting block (131) arranged at the side close to the inner magnetic pole block (12) and one or more second sub connecting blocks (132) which are sequentially overlapped from inside to outside along the radial direction on the basis of the first sub connecting block (131).

8. The spliced stator structure of any one of claims 1-7, wherein the stator structure further comprises:

the annular magnetic diffusion module (3) is arranged on the inner periphery of the inner magnetic pole block (12) and/or the outer periphery of the outer magnetic pole block and/or the outer end face of the stopping connecting block (13), and is suitable for increasing the magnetic pole area of the stator core (1).

9. The spliced stator structure according to claim 8, wherein the outer magnetic pole block (11), the inner magnetic pole block (12), the stop connecting block (13) and the magnetism spreading module (3) are made of silicon steel sheets;

and/or the stop connecting block (13) is fixedly connected with the outer magnetic pole block (11) and the inner magnetic pole block (12) respectively in a screw and/or bonding mode.

10. An axial magnetic suspension bearing comprising a split stator structure according to any of claims 1 to 9.