CN114922906B - Spliced stator structure and axial magnetic suspension bearing - Google Patents
Spliced stator structure and axial magnetic suspension bearing Download PDFInfo
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- CN114922906B CN114922906B CN202210646181.XA CN202210646181A CN114922906B CN 114922906 B CN114922906 B CN 114922906B CN 202210646181 A CN202210646181 A CN 202210646181A CN 114922906 B CN114922906 B CN 114922906B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
- F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The application 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 an annular outer magnetic pole block, an inner magnetic pole block and a stop connecting block, wherein the inner magnetic pole block is coaxially arranged in the outer magnetic pole block, and the stop connecting block is suitable for blocking one end of the outer magnetic pole block and one end of the inner magnetic pole block; one end of the inner magnetic pole block and/or one end of the outer magnetic pole block are/is provided with a limit flange suitable for limiting and resisting the coil assembly, one end of the coil assembly is propped against the limit flange, and the other end of the coil assembly is limited and fixed in an annular installation space formed between the outer magnetic pole block and the inner magnetic pole block under the stop action of the stop connecting block. The stator core of the application adopts a spliced structural design, so that bearing stator structures with different sizes and output can be spliced according to actual assembly requirements and output requirements, the universality is high, and the scrapping cost is low. 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
Technical Field
The application relates to the technical field of magnetic suspension bearings, in particular to a spliced stator structure and an axial magnetic suspension bearing.
Background
The magnetic bearings may be classified into active magnetic bearings, passive magnetic bearings, and hybrid magnetic bearings according to a magnetic force providing manner. The active magnetic bearing has simple structure and stable output, so most of the magnetic bearings currently adopt active magnetic bearings. As shown in fig. 1, the stator core 1 'of the conventional active magnetic bearing is generally designed as an integrated structure, and the stator core 1' formed by integrated processing mainly has the following defects: each iron core can only correspond to one bearing system, and for 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 coil frame 2 ' is fixed by adopting the screw 3 ', so that the phenomenon of high rejection rate of the coil frame 2 ' caused by sliding teeth of the screw 3 ' easily occurs in the locking process of the screw 3 '.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to overcome the defects that the stator core is designed by adopting an integrated structure in the magnetic bearing in the prior art, the stator core is required to be redesigned for different sizes and output requirements, the universality is poor, and the coil is fixed by adopting screws, so that the coil framework rejection rate is high due to the fact that the screws slide, and therefore, the spliced stator structure and the axial magnetic suspension bearing with high universality and low rejection rate are provided.
In order to solve the above-mentioned problems, in a first aspect, the present application provides a spliced stator structure comprising:
a coil assembly;
the stator core is formed by splicing an annular outer magnetic pole block, an inner magnetic pole block and a stop connecting block, the inner magnetic pole block is coaxially arranged in the outer magnetic pole block, an annular mounting space suitable for accommodating the coil assembly is formed between the outer magnetic pole block and the inner magnetic pole block, and the stop connecting block is suitable for blocking one end of the outer magnetic pole block and one end of the inner magnetic pole block;
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 the annular installation space under the stop action of the stop connecting block.
Optionally, the outer magnetic pole piece is an annular member with an L-shaped section, and the inner magnetic pole piece is a cylindrical member;
the outer pole piece 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 magnetic pole piece, and the second annular side wall forms the limit flange.
Optionally, the stop connection block includes:
an annular connecting part which is suitable for blocking and connecting the outer magnetic pole piece and the inner magnetic pole piece on the end wall of one side far away from the limit flange;
the annular stop part is arranged on one side of the annular connecting part and is suitable for extending into the annular installation space to be matched with the coil assembly stop.
Optionally, the radial width of the annular stop portion is matched with the distance between the outer magnetic pole piece and the inner magnetic pole piece, the outer diameter of the annular connecting portion is matched with the outer diameter of the outer magnetic pole piece, and the inner diameter of the annular connecting portion is matched with the inner diameter of the inner magnetic pole piece.
Optionally, the stop connection block can be formed by overlapping and splicing a plurality of sub connection blocks in the radial direction;
the sub-connecting blocks are of annular structures, and a 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-connection block includes a splice connection portion and a splice stop portion for splicing to form the annular connection portion and the annular stop portion;
the sub-connecting blocks at least comprise mutually matched:
the splicing stop part of the first sub-connecting block is connected to the middle position of the splicing connecting part in a T shape;
the second sub-connecting block, the concatenation backstop portion of second sub-connecting block is Z style of calligraphy dislocation stack setting with the concatenation connecting portion.
Optionally, the stop connection block comprises a first sub-connection block arranged near the outer magnetic pole block side and one or more second sub-connection blocks sequentially overlapped from outside to inside along the radial direction on the basis of the first sub-connection block;
alternatively, the stopper connection block includes a first sub-connection block disposed near the inner pole piece side and one or more second sub-connection blocks sequentially stacked from inside to outside in the radial direction on the basis of the first sub-connection block.
Optionally, the stator structure further comprises:
the annular magnetism expansion module is arranged on the inner periphery of the inner magnetic pole block and/or the outer periphery of the outer magnetic pole block and/or the outer end face of the stop connecting block and is 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 respectively connected and fixed with the outer magnetic pole block and the inner magnetic pole block by a screw and/or bonding mode.
In a second aspect, the application also provides an axial magnetic suspension bearing, which comprises the spliced stator structure.
The application has the following advantages:
1. according to the stator structure provided by the embodiment of the application, the stator core adopts the spliced structural design, and each spliced component of the spliced stator core is a part of the integral structure, so that bearing stator structures with different sizes and forces can be obtained by splicing according to actual assembly requirements and force output requirements, and the universality of the stator core is improved. And compare in the stator core that the integration set up, the stator core that is formed by a plurality of splice parts concatenation, its every splice part simple structure, the preparation is efficient, can reduce the risk and the cost of scrapping that the iron core is whole that processing failure leads to effectively simultaneously.
2. According to the stator structure provided by the embodiment of the application, through the limit flange arranged at one end of the inner magnetic pole block and/or the outer magnetic pole block, when the stator structure is assembled, one end of the coil assembly is propped against the limit flange, and the other end of the coil assembly is limited and fixed in the annular installation space under the stop action of the stop connecting block, so that the assembly of the coil without a screw 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 application comprises an annular connecting part which is suitable for blocking and connecting the outer magnetic pole block and the inner magnetic pole block on the end wall of one side of the outer magnetic pole block, which is far away from the limit flange, and an annular stop part which is arranged on one side of the annular connecting part and is suitable for extending into the annular installation space and is matched with the coil assembly in a stop way, so that the stop connecting block can be connected with the outer magnetic pole block and the inner magnetic pole block to splice and obtain a stator core whole and can be matched with the coil assembly in a stop way, and the coil assembly is stably and reliably fixed in the stator core.
4. In the embodiment of the application, the stop connecting block can be formed by overlapping and splicing a plurality of sub-connecting blocks in the radial direction, in the assembling process, 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 according to the size of the inner and outer diameter assembling space of the bearing, 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, so that the radial width of the whole stop connecting block is adjusted by continuously overlapping the second sub-connecting blocks, and the inner diameter and the outer diameter of the stator core are adjusted, thereby meeting the inner diameter and the outer diameter requirements in the actual assembling process.
5. According to the embodiment of the application, the magnetic expansion module can be added on the inner circumference of the inner magnetic pole block and/or the outer circumference of the outer magnetic pole module and/or the outer end face of the stop connecting block according to the requirement of 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 module, and different requirements are met. In addition, the inner magnetic pole block, the connecting block and the magnetism expansion module are all made of silicon steel sheets, so that eddy current loss of the bearing in the running process can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic sectional view of an assembly of a prior art bearing stator core and a coil;
fig. 2 shows an assembled sectional view of a stator core and a coil in the present embodiment;
FIG. 3 shows a cross-sectional view of the outer pole piece in this embodiment;
fig. 4 shows a top view of the outer pole piece in this embodiment;
FIG. 5 shows a cross-sectional view of the inner pole piece in this embodiment;
FIG. 6 shows a top view of the inner pole piece in this embodiment;
FIG. 7 shows a cross-sectional view of the stop block/first sub-block of the present embodiment;
FIG. 8 shows a top view of the stop block/first sub-block of the present embodiment;
FIG. 9 shows an assembly schematic of one implementation of the present example with the second sub-connection block superimposed on the first sub-connection block inner diameter;
FIG. 10 shows an assembly schematic of one implementation of the present example with a second sub-connection block superimposed on the first sub-connection block outer diameter;
FIG. 11 shows a cross-sectional view of the second sub-connection block in this embodiment;
fig. 12 shows a top view of the second sub-connection block in this embodiment;
fig. 13 is a schematic cross-sectional view showing the structure of one embodiment of a stator core added magnetism expanding module in this example;
fig. 14 shows a cross-sectional view of the first/second magnetism expansion modules in the present embodiment;
fig. 15 shows a top view of the first/second magnetism expansion modules in this embodiment;
fig. 16 shows a cross-sectional view of a third magnetism expansion module in the present embodiment;
fig. 17 shows a top view of a third magnetism expansion module in the present embodiment;
reference numerals illustrate:
1. a stator core;
11. an outer pole piece; 111. a limit flange;
12. an inner pole piece;
13. a stop connection block; 13a, an annular connection; 13b, an annular stop; 131. a first sub-connection block; 132. a second sub-connection block;
2. a coil assembly;
3. a magnetism expansion module; 31. a first magnetism expansion module; 32. a second magnetism expansion module; 33. a third magnetism expansion module;
1', a stator core; 2', a coil skeleton; 3', screw.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. 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 application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
Example 1
As shown in fig. 2 to 17, the present embodiment provides a spliced stator structure including a coil block 2 and a stator core 1, the coil block 2 including a coil bobbin and a coil wound around the coil bobbin. The stator core 1 is formed by splicing an annular outer magnetic pole block 11, an inner magnetic pole block 12 and a stop connection block 13, the inner magnetic pole block 12 is coaxially arranged in the outer magnetic pole block 11, an annular installation space suitable for accommodating the coil assembly 2 is formed between the outer magnetic pole block 11 and the inner magnetic pole block 12, and the stop connection block 13 is suitable for blocking one end connected with the outer magnetic pole block 11 and the inner magnetic pole block 12.
According to the stator structure provided by the embodiment, the stator core 1 is designed in a spliced structure, and each spliced component of the spliced stator core 1 is a part of the whole structure, so that axial bearings with different forces can be obtained by splicing according to actual demands, and the universality of the stator core 1 is improved. And compare in the stator core 1 that the integration set up, the stator core 1 that is formed by a plurality of splice parts concatenation, its every splice part simple structure, the preparation is efficient, can reduce the risk and the cost of scrapping that the iron core is whole that processing failure leads to effectively simultaneously.
Further, as shown in fig. 2 to 4, one end of the inner pole piece 12 and/or the outer pole piece 11 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 is limited and fixed in the annular installation space under the stop action of the stop connection block 13.
According to the stator structure provided by the embodiment, through the limiting flange 111 arranged at one end of the inner magnetic pole piece 12 and/or the outer magnetic pole piece 11, when in assembly, 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 installation space under the stop action of the stop 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 the coil skeleton is reduced, and the stability of the whole coil assembly 2 is higher.
Alternatively, in the present embodiment, the limit flange 111 may be provided on the outer periphery of the inner pole piece 12 or the inner periphery of the outer pole piece 11, or the limit flange 111 may be provided on both the outer periphery of the inner pole piece 12 and the inner periphery of the outer pole piece 11 to limit the coil block 2.
Alternatively, in the present embodiment, the limit flange 111 may be an annular flange provided on the outer periphery of the inner pole piece 12 or the inner periphery of the outer pole piece 11, or may be a plurality of protruding structures provided at intervals along the outer peripheral wall of the inner pole piece 12 or the inner peripheral wall of the outer pole piece 11.
Alternatively, in this embodiment, the outer magnetic pole piece 11 is an annular member with an L-shaped cross section, and the inner magnetic pole piece 12 is a cylindrical member; the outer pole piece 11 comprises a first annular side wall and a second annular side wall 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 integral annular member with a cross section approximately L-shaped by machining, so that one annular side wall of the outer magnetic pole piece 11 can form the limit flange 111, the connection step between the limit flange 111 and the outer magnetic pole piece 11 is omitted, the assembly process is simplified, and meanwhile, the stability of the structure of the limit flange 111 can be improved.
Optionally, the stop connection block 13 is a ring-shaped sheet structure with a certain thickness, the stop connection block 13 includes an annular connection portion 13a and an annular stop portion 13b, and the annular connection portion 13a is adapted to be blocked and connected to one end wall of the outer magnetic pole piece 11 and the inner magnetic pole piece 12, which is far from the limit flange 111; the annular stop portion 13b is disposed at one side of the annular connecting portion 13a, and is adapted to extend into the annular mounting space to be in stop fit with the coil assembly 2. Through adopting above-mentioned design for backstop connecting block 13 can be connected outer magnetic pole piece 11 and interior magnetic pole piece 12 to splice and obtain a stator core 1 whole, can with coil pack 2 backstop cooperation again, fix coil pack 2 in stator core 1 steadily, reliably.
Alternatively, the radial width of the annular stopper 13b matches the spacing between the outer and inner pole pieces 11, 12, more precisely the radial width of the annular stopper 13b is equal to or slightly smaller than the spacing between the inner peripheral wall of the outer pole piece 11 and the outer peripheral wall of the inner pole piece 12.
The outer diameter of the annular connecting portion 13a is matched with the outer diameter of the outer magnetic pole block 11, and the inner diameter of the annular connecting portion 13a is matched with the inner diameter of the inner magnetic pole block 12, so that the annular connecting portion 13a can just seal and connect the outer magnetic pole block 11 and the inner magnetic pole block 12 in the circumferential direction of the end wall on the side far away from the limit flange 111, and the integrity of the stator core 1 is improved.
Optionally, in this embodiment, the stop connection block 13 is connected and fixed with the outer magnetic pole piece 11 and the inner magnetic pole piece 12 by a screw and/or an adhesive manner, respectively. In this embodiment, the stator core 1 is formed by splicing the stop connection block 13, the outer magnetic pole block 11 and the inner magnetic pole block 12, so that each component can be assembled after being machined, and even if the component is scrapped due to poor machining in the manufacturing process of a certain component, other components cannot be interfered, and the problem of high scrapping cost caused by overall scrapping is avoided.
Alternatively, in this embodiment, as shown in fig. 2, 7 and 8, the stop connection block 13 is an annular member with a T-shaped cross section, and the T-shaped stop connection block 13 includes a first annular wall disposed horizontally and a second annular wall connected vertically at a position intermediate the first annular wall, where the first annular wall forms the annular connection portion 13a, and the second annular wall forms the annular stop portion 13b.
Alternatively, in the present embodiment, the annular stopper 13b and the annular connecting portion 13a are the same in thickness, i.e., in length in the axial direction.
Alternatively, in this embodiment, the stop connection block 13 may be formed by stacking and splicing multiple sub connection blocks in the radial direction; the sub-connecting blocks are of annular structures, 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-connection block includes a splice connection portion and a splice stopper portion for splice forming the annular connection portion 13a and the annular stopper portion 13 b; the sub-connection blocks at least comprise a first sub-connection block 131 and a second sub-connection block 132 which are matched with each other, and a splicing stop part of the first sub-connection block 131 is connected in the middle of a splicing connection part in a T shape; the splice stopper portion and the splice connection portion of the second sub-connecting block 132 are arranged in a zigzag staggered manner.
In the above-mentioned aspect, the first sub-connection block 131 is a ring-shaped member with a T-shaped cross section, and the second sub-connection block 132 is a ring-shaped member with an approximately Z-shape, so that the second sub-connection block 132 can still form a T-shaped ring-shaped member after being spliced with the first sub-connection block 131.
Specifically, the first sub-connection block 131 includes a first sub-ring wall and a second sub-ring wall that are connected in a T-shape, wherein the second sub-ring wall is connected at a middle position of the first sub-ring wall, an L-shaped stepped groove that is disposed upward is formed between the first sub-ring wall and the second sub-ring wall, the second sub-ring wall forms a splice stop portion of the first sub-connection block 131, and the first sub-ring wall forms a splice connection portion of the first sub-connection block 131.
The second sub-connecting block 132 includes a third sub-annular wall and a fourth sub-annular wall, the fourth sub-annular wall is stacked above the third sub-annular wall in a staggered manner, so that an L-shaped stepped groove arranged downwards is formed between the fourth sub-annular wall and the third sub-annular wall, the fourth sub-annular wall forms a splicing stop portion of the second sub-connecting block 132, the third sub-annular wall forms a splicing connection portion of the second sub-connecting block 132, the height of the fourth sub-annular wall is the same as the height of the second sub-annular wall, and the staggered portion of the fourth sub-annular wall can be just anastomotic and overlapped in the L-shaped stepped groove formed between the first sub-annular wall and the second sub-annular wall, namely, the L-shaped stepped groove of the second sub-connecting block 132 is spliced with the L-shaped stepped groove of the first sub-connecting block 131, so that the second sub-connecting block 132 and the first sub-connecting block 131 can still form an overall L-shaped annular member after being stacked.
It should be noted that, the widths of the third sub-annular wall and the fourth sub-annular wall in the radial direction may be the same or different, so long as the missed portion of the fourth sub-annular wall is ensured to be coincident with the L-shaped stepped groove of the first sub-connecting block 131, and the second sub-connecting block 132 may still form a T-shaped annular member as a whole after being spliced with the first sub-connecting block 131.
Alternatively, in the present embodiment, as shown in fig. 2 and 9, the stopper link block 13 includes a first sub link block 131 provided on the side close to the outer pole block 11 and one or more second sub link blocks 132 sequentially stacked from outside to inside in the radial direction on the basis of the first sub link block 131; alternatively, as shown in fig. 2 and 10, the stopper connection block 13 includes a first sub-connection block 131 disposed on the side close to the inner pole piece 12 and one or more second sub-connection blocks 132 sequentially stacked from inside to outside in the radial direction on the basis of the first sub-connection block 131. The first sub-connecting piece 131 and the one or more second sub-connecting pieces 132 superimposed therewith together form the stop connecting piece 13.
In this embodiment, the stop connection block 13 may be formed by stacking and splicing multiple sub-connection blocks in the radial direction, in the assembly process, according to the size of the inner and outer diameter assembly space of the bearing, one or more second sub-connection blocks 132 are added at the inner diameter of the first sub-connection block 131 to reduce the inner diameter of the stator core 1, or one or more second sub-connection blocks 132 are added at the outer diameter of the first sub-connection block 131 to increase the outer diameter of the stator core 1, so as to adjust the radial width of the whole stop connection block 13 by continuously stacking the second sub-connection blocks 132, and further adjust the inner and outer diameters of the stator core 1, so as to meet the inner and outer diameter requirements in actual assembly.
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 superposing the second sub-connection block 132 on the first sub-connection block 131 is as follows:
in this embodiment, the first sub-connection block 131, the inner pole piece 12 and the outer pole piece 11 may be assembled to form a basic stator structure by means of, for example, screw locking, structural adhesive bonding, etc., and the coil assembly 2 is placed in an annular mounting groove formed by the inner pole piece 12, the first sub-connection block 131 and the outer pole piece 11. The inner diameter of the stator core 1 may be reduced and the installation space of the coil assembly 2 may be increased by adding the second sub-connection block 132 at the inner diameter of the first sub-connection block 131, as shown in fig. 9. Similarly, the second sub-connection block 132 may be added to the outer diameter of the first sub-connection 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, and so on to meet the requirement of actually assembling the inner and outer diameters by increasing the radial width of the stop connection block 13.
Of course, the radial width of the stop connection block 13 can be reduced to meet the requirement of the inner diameter and the outer diameter of the actual assembly, if the assembly space of the inner diameter of the bearing is too small, the inner diameter of the stator core 1 can be increased by replacing the stop connection block 13 with a smaller radial width. Similarly, 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 smaller radial width, and the inner diameter and the outer diameter of the bearing core can be continuously changed by the same method so as to adapt to various requirements.
Optionally, as shown in fig. 2 and fig. 13 to fig. 17, the stator structure in this embodiment further includes an annular magnetic expansion module 3, where the magnetic expansion module 3 is disposed on an inner periphery of the inner pole piece 12 and/or an outer periphery of the outer pole piece and/or an outer end face of the stop connection block 13, and is adapted to increase a magnetic pole area of the stator core 1.
In this embodiment, the magnetic expansion module 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 block and/or the outer end surface of the stop connection block 13 according to the requirement of the magnetic pole area of the assembled integral axial bearing, so as to increase the magnetic pole area of the stator core 1 by adding the magnetic expansion module 3, so as to meet different requirements.
Specifically, the magnetism expansion module 3 includes a first magnetism expansion module 31 provided at the inner periphery of the inner pole piece 12, and a second magnetism expansion module 32 provided at the outer periphery of the outer pole piece 11. Optionally, the magnetic expanding module 3 further includes a third magnetic expanding module 33 disposed on an end surface of the stop connection block 13 away from the side of the coil assembly 2, where whether the first magnetic expanding module 31, the third magnetic expanding module 33 and the second magnetic expanding module 32 are externally added may 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 expansion module 3 are all made of silicon steel sheets. In the application, the outer magnetic pole block 11, the inner magnetic pole block 12, the stop connecting block 13 and the magnetism expansion module 3 are all made of silicon steel sheets, so that the eddy current loss of the bearing in the running process can be reduced.
In this embodiment, the stop connection block 13 is an annular part with a section similar to a Z-shape or a T-shape, and is formed by stacking silicon steel sheets, and the third magnetism expansion module 33 is a annular sheet structure formed by stacking silicon steel sheets. The inner magnetic pole block 12, the first magnetic expanding module 31 and the second magnetic expanding module 32 are circular, and are formed by winding silicon steel sheets, the silicon steel sheets of the inner magnetic pole block 12 only need to ensure the h height, the minimum winding inner diameter can be changed according to the requirement, so that the inner diameter of the iron core can be increased from L1 to L2, and L2> L1, and the inner diameter and the outer diameter of the iron core can be changed by the magnetic expanding module 3 by the method.
In this embodiment, if the magnetic pole area of the overall axial bearing does not meet the requirement, as shown in fig. 13, the magnetic pole area can be increased by adding the additional magnetic expansion module 3. In this embodiment, the magnetic expansion modules 3 are added to the outer part of the outer magnetic pole block 11, the inner part of the inner magnetic pole block 12 and the lower side of the stop connection block 13 respectively, and the specific assembly process is as follows:
first, the inner diameter a, the outer diameter b, and the thickness (length in the axial direction) c of the magnetism expansion module 3 are set. As shown in fig. 13 to 15, an annular first magnetism expansion module 31 may be added inside the inner magnetic pole piece 12 to increase the inner magnetic pole area, and the inner magnetic pole piece 12 is heated to expand and thermally cover the first magnetism expansion module 31, and then cooled, and the inner magnetic pole piece 12 is contracted and stably fixed on the first magnetism expansion module 31, so as to realize the assembly of the inner magnetic pole piece 12 and the first magnetism expansion module 31. Wherein: the inner diameter a1 of the first magnetism expansion module 31 may be sized according to the expanded magnetic pole area requirement, the outer diameter b1 is identical to the inner diameter of the inner magnetic pole piece 12, and the thickness c1=the inner magnetic pole thickness h+the thickness of the annular connecting portion 13 a. Alternatively, in the present embodiment, the thickness of the annular connecting portion 13a is equal to half the thickness H of the stopper connecting block 13, and thus, c1=h+1/2H.
Further, a circular second magnetic expansion block is added outside the outer magnetic pole block 11 to enlarge the outer magnetic pole area, and the outer magnetic pole block 11 and the second magnetic expansion block 32 are assembled by heating the second magnetic expansion block 32 to be thermally sleeved on the outer magnetic pole block 11. Wherein: the second magnet expanding block has an inner diameter dimension a2 consistent with the outer diameter of the outer pole piece 11, an outer diameter b2 determined according to the expanded pole area requirement, and a thickness c2=the outer pole piece thickness+the thickness of the annular connecting portion 13 a.
Further, as shown in fig. 13, 16 and 17, adding a third magnetism expansion module 33 on the lower end side of the stopper connection block 13 achieves the increase of the magnetic pole area, and the third magnetism expansion module 33 can achieve the fitting connection with the stopper connection block 13 by a screw. Specifically, the inner diameter a3 of the third magnetic expanding module 33 is equal to the inner diameter a1 of the first magnetic expanding module 31, the outer diameter b3 is equal to the outer diameter b2 of the second magnetic expanding 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 proper position according to the actual size of the assembly space, so as to increase the magnetic area and the output force of the bearing iron core.
The spliced stator structure provided in this embodiment can realize the manufacture of bearing cores with different assembly requirements and output requirements by increasing the number of the second sub-connecting blocks 132 and the magnetism expansion 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 processing cost of scrapping, also can make things convenient for the processing of spare and accessory parts, satisfies different assembly dimensions and output demand simultaneously, and the commonality is high.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the application.
Claims (5)
1. A spliced stator structure, comprising:
a coil assembly (2);
the stator core (1) is formed by splicing an annular outer magnetic pole block (11), an inner magnetic pole block (12) and a stop connecting block (13), wherein the inner magnetic pole block (12) is coaxially arranged in the outer magnetic pole block (11), an annular installation space suitable for accommodating a coil assembly (2) is formed between the outer magnetic pole block (11) and the inner magnetic pole block (12), and the stop connecting block (13) is suitable for blocking one end connected with the outer magnetic pole block (11) and one end connected with the inner magnetic pole block (12);
the annular magnetic expansion 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 stop connecting block (13), and is suitable for increasing the magnetic pole area of the stator core (1);
one end of the inner magnetic pole block (12) and/or one end of the outer magnetic pole block (11) are provided with a limiting flange (111) suitable for limiting and resisting the coil assembly (2), one end of the coil assembly (2) is abutted against the limiting flange (111), and the other end of the coil assembly is limited and fixed in the annular installation space under the stop action of the stop connecting block (13);
the stop connecting block (13) can be formed by overlapping and splicing a plurality of sub-connecting blocks in the radial direction;
the sub-connecting blocks are of annular structures, 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;
the stopper connecting block (13) includes:
an annular connection (13 a) adapted to be blocked and connected to an end wall of the outer pole piece (11) and the inner pole piece (12) on the side remote from the limit flange (111);
an annular stop part (13 b) arranged on one side of the annular connecting part (13 a) and suitable for extending into the annular installation space to be in stop fit with the coil assembly (2);
the sub-connecting blocks comprise splicing connecting parts and splicing stopping parts, wherein the splicing connecting parts and the splicing stopping parts are used for splicing and forming the annular connecting parts (13 a) and the annular stopping parts (13 b);
the sub-connecting blocks at least comprise mutually matched:
the first sub-connecting block (131), wherein the splicing stop 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 stop part and the splicing connecting part of the second sub-connecting block (132) are staggered and overlapped in a Z shape;
the stop connection block (13) comprises a first sub-connection block (131) arranged on the side close to the outer magnetic pole block (11) and one or more second sub-connection blocks (132) which are sequentially overlapped from outside to inside along the radial direction on the basis of the first sub-connection block (131);
alternatively, the stopper connection block (13) includes a first sub-connection block (131) provided on a side close to the inner pole block (12) and one or more second sub-connection blocks (132) sequentially stacked from inside to outside in the radial direction on the basis of the first sub-connection block (131).
2. The spliced stator structure according to claim 1, wherein the outer pole piece (11) is an annular member having an L-shaped cross section, and the inner pole piece (12) is a cylindrical member;
the outer pole piece (11) comprises a first annular side wall and a second annular side wall connected in an L-shape, wherein: the annular mounting space is formed between the first annular side wall and the inner magnetic pole piece (12), and the second annular side wall forms the limit flange (111).
3. The spliced stator structure according to claim 1, wherein a radial width of the annular stopper portion (13 b) matches a distance between the outer pole piece (11) and the inner pole piece (12), an outer diameter of the annular connecting portion (13 a) matches an outer diameter of the outer pole piece (11), and an inner diameter of the annular connecting portion (13 a) matches an inner diameter of the inner pole piece (12).
4. The spliced stator structure according to claim 1, wherein the outer pole piece (11), the inner pole piece (12), the stop connection piece (13) and the magnetism expansion module (3) are all made of silicon steel sheets;
and/or the stop connecting block (13) is respectively connected and fixed with the outer magnetic pole piece (11) and the inner magnetic pole piece (12) by a screw and/or bonding mode.
5. An axial magnetic bearing comprising a spliced stator structure according to any one of claims 1-4.
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| CN202210646181.XA CN114922906B (en) | 2022-06-08 | 2022-06-08 | Spliced stator structure and axial magnetic suspension bearing |
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| CN202210646181.XA CN114922906B (en) | 2022-06-08 | 2022-06-08 | Spliced stator structure and axial magnetic suspension bearing |
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| CN114922906B true CN114922906B (en) | 2023-09-15 |
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| CN114922906A (en) | 2022-08-19 |
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