Stator assembly and magnetic suspension rotating equipment

Abstract

The utility model relates to the technical field of magnetic suspension, in particular to a stator assembly and magnetic suspension rotating equipment. The stator assembly provided by the embodiment of the utility model comprises a stator, a plurality of coils and a plurality of first insulating pieces, the stator comprises a yoke part and a plurality of tooth parts, each tooth part is arranged on the radial inner side of the yoke part and extends inwards in the radial direction of the yoke part, and the plurality of tooth parts are arranged at intervals in the circumferential direction of the yoke part; the plurality of coils are in one-to-one correspondence with the plurality of tooth parts, and each coil sleeves the corresponding tooth part; the plurality of first insulating parts sleeve the corresponding tooth parts and are arranged between the corresponding tooth parts and the corresponding coils; wherein the first insulating part comprises a plurality of side walls which are arranged in sequence in the circumferential direction of the tooth part, every two adjacent side walls are connected through a connecting wall, and the structural strength of the connecting walls is smaller than that of the side walls. The technical effects that the insulation paper is easy to fold and not prone to rebound after being folded, and the assembly quality and the assembly efficiency are improved are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic suspension, in particular to a stator assembly and a magnetic suspension rotating device. BACKGROUND

[0002] An insulating layer is arranged between the motor stator laminations and the coils, and between the magnetic bearing laminations and the coils. In addition to improving the insulation performance, it also has the effect of protecting the coils from being scratched by sharp silicon steel sheet laminations. The insulating paper is generally hard and needs to be cut into the required shape by hand with a tool, which is relatively low in efficiency and poor in consistency. Moreover, the insulating paper is not easy to fold and is very easy to rebound after folding, which causes the coils to be unable to be assembled to the lamination teeth, thereby affecting the consistency and reliability of the motor stator and the magnetic bearing assembly and reducing the assembly efficiency. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a stator assembly and a magnetic suspension rotating device, which achieves the technical effect that the insulating paper is easy to fold and is not easy to rebound after folding, thereby improving the assembly quality and assembly efficiency.

[0004] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present application comprises:

[0005] In a first aspect, the present application provides a stator assembly, comprising a stator, a plurality of coils and a plurality of first insulating pieces. The stator comprises a yoke portion and a plurality of tooth portions. Each tooth portion is arranged on the radially inner side of the yoke portion and extends radially inward along the yoke portion. The plurality of tooth portions are arranged at intervals along the circumferential direction of the yoke portion. The plurality of coils correspond one-to-one to the plurality of tooth portions. Each coil is sleeved on the corresponding tooth portion. The plurality of first insulating pieces are sleeved on the corresponding tooth portions and arranged between the corresponding tooth portions and the corresponding coils. Along the circumferential direction of the tooth portion, the first insulating piece comprises a plurality of side walls arranged in sequence. Two adjacent side walls are connected by a connecting wall. The structural strength of the connecting wall is less than that of the side wall.

[0006] The stator assembly provided in the present application embodiment has the first insulating piece sleeved on the tooth portion and arranged between the tooth portion and the coil, so as to insulate the tooth portion and the coil and reduce the scratching of the tooth portion on the coil. The two adjacent side walls of the first insulating piece are connected by the connecting wall. The structural strength of the connecting wall is less than that of the side wall, so that the first insulating piece is easy to fold and is not easy to rebound or curl after folding. Therefore, the influence of the first insulating piece on the installation of the coil is reduced, and the assembly quality and assembly efficiency of the first insulating piece installed on the stator are improved.

[0007] Optionally, the connecting wall is provided with a first through hole penetrating the connecting wall along the thickness direction of the connecting wall, and a plurality of first through holes are arranged along the radial direction of the yoke.

[0008] The connecting wall is provided with a plurality of first through holes arranged at intervals along the radial direction of the yoke, the arrangement of the first through holes weakens the structural strength of the connecting wall, so that the first insulation piece is easy to fold and not easy to rebound after folding, thereby reducing the influence of the first insulation piece on the coil and improving the structural stability of the first insulation piece and the assembly quality and efficiency.

[0009] Optionally, the plurality of side walls include a first side wall, a second side wall, a third side wall, and a fourth side wall, the first side wall is arranged opposite to the third side wall along a first direction, the second side wall is arranged opposite to the fourth side wall along a second direction, the first direction is parallel to the axial direction of the yoke, and the first direction, the second direction, and the radial direction of the yoke are perpendicular to each other.

[0010] The first side wall, the second side wall, the third side wall, and the fourth side wall are sequentially connected, the connecting wall is connected between the first side wall and the second side wall, the connecting wall is connected between the second side wall and the third side wall, the connecting wall is connected between the third side wall and the fourth side wall, and the connecting wall is connected between the fourth side wall and the first side wall, and a plurality of first through holes are arranged on the connecting wall to weaken the strength of the connecting wall, so that the first insulation piece is easy to fold and not easy to rebound after folding.

[0011] Optionally, along the second direction, the first side wall includes a first part and a second part, the first part and the second part are arranged at intervals, the first part is connected to the second side wall by one connecting wall, and the second part is connected to the fourth side wall by one connecting wall.

[0012] The first part and the second part are arranged at intervals, so that the first insulation piece is easy to be sleeved on the tooth part, the assembly efficiency is improved, the scratching of the tooth part by the first insulation piece when the first insulation piece is sleeved on the tooth part is reduced, and in addition, the first part and the second part are arranged at intervals, the overlap between the first part and the second part is reduced, the thickness of the first insulation piece is reduced, and the coil is easily sleeved on the tooth part, and the assembly efficiency is improved.

[0013] Optionally, the first part and the second part are fixedly connected to the tooth part by a first adhesive layer. After the first insulation piece is sleeved on the tooth part, the first part and the second part are folded and attached to the tooth part, and then the first adhesive is brushed on the tooth part, the first adhesive is solidified, the first part and the second part are quickly attached and pasted on the tooth part, and the assembly efficiency is improved.

[0014] Optionally, the first part and the second part are further fixedly connected by a second adhesive layer, and a third adhesive layer is coated on the side surface of the connecting wall in the thickness direction; the solidification speed of the second adhesive layer and the third adhesive layer are both less than the solidification speed of the first adhesive layer.

[0015] The solidification speed of the first adhesive layer is greater than the solidification speed of the second adhesive layer and the third adhesive layer, the first adhesive layer is used to quickly fix the first part and the second part to the tooth part, and the second adhesive layer and the third adhesive layer are used to improve the strength and insulation performance of the first insulation part. In addition, since the solidification speed of the second adhesive layer and the third adhesive layer is slow, the first adhesive layer and the third adhesive layer can simultaneously fix the coil after the coil is sleeved on the first insulation part after the second adhesive layer and the third adhesive layer are coated on the first insulation part.

[0016] Optionally, the stator assembly further comprises a circuit board and a second insulation part, the circuit board is arranged on one side of the yoke part along the axial direction of the yoke part, and the second insulation part is arranged between the yoke part and the circuit board along the axial direction of the yoke part; the radial outer circumferential surface of the second insulation part does not protrude from the radial outer circumferential surface of the yoke part along the radial direction of the yoke part.

[0017] The second insulation part is arranged between the circuit board and the yoke part of the stator to insulate the yoke part of the stator and the circuit board; the radial outer circumferential surface of the second insulation part does not protrude from the radial outer circumferential surface of the yoke part, thereby reducing interference between the second insulation part and the inner wall of the shell when the stator assembly is subsequently installed in the shell, so that the stator assembly can be smoothly assembled.

[0018] Optionally, the stator assembly further comprises a third insulation part, the third insulation part is sleeved on the tooth part, the third insulation part is located between the yoke part and the coil along the radial direction of the stator; the tooth part comprises a first side surface and a second side surface arranged oppositely along the axial direction of the yoke part, the coil comprises a first coil segment and a second coil segment arranged oppositely, the first coil segment is adjacent to the first side surface, and the second coil segment is adjacent to the second side surface, and the first coil segment is provided with a lead wire bundle; the third insulation part comprises a first insulation segment and a second insulation segment arranged oppositely along the axial direction of the yoke part, the first insulation segment is arranged between the first coil segment and the yoke part, and the second insulation segment is arranged between the second coil segment and the yoke part; the size of the first insulation segment is not greater than the distance between the lead wire bundle and the first side surface along the axial direction of the yoke part. When the lead wire bundle is led out to be connected with the circuit board, the first insulation segment does not contact the lead wire bundle, thereby reducing damage of the first insulation segment to the lead wire bundle.

[0019] Optionally, the stator assembly further comprises a third insulation piece, the third insulation piece is sleeved on the tooth portion along the radial direction of the stator, and is located between the yoke portion and the coil; along the axial direction of the yoke portion, the tooth portion comprises oppositely arranged first and second side faces, the coil comprises oppositely arranged first and second coil sections, the first coil section is adjacent to the first side face, and the second coil section is adjacent to the second side face; the first coil section is provided with a lead wire bundle; along the axial direction of the yoke portion, the third insulation piece comprises oppositely arranged first and second insulation sections, the first insulation section is arranged between the first coil section and the yoke portion, and the second insulation section is arranged between the second coil section and the yoke portion; the first insulation section is provided with a relief gap for avoiding the lead wire bundle.

[0020] In a second aspect, the embodiments of the present application provide a magnetic suspension rotating device, comprising the stator assembly of any of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a structural schematic diagram of the stator assembly in the present application;

[0023] Figure 2 It is a partial structural schematic diagram of the stator assembly in the present application;

[0024] Figure 3 It is a structural schematic diagram of the first insulation piece in the present application;

[0025] Figure 4 It is an expanded view of the first insulation piece in the present application.

[0026]

Explanation of reference numerals

[0027] 1: stator; 11: yoke portion; 12: tooth portion; 121: first side face; 122: second side face;

[0028] 2: coil; 21: first coil section; 22: second coil section; 23: lead wire bundle;

[0029] 3: first insulation piece; 31: connecting wall; 310: first through hole; 32: first side wall; 321: first part; 322: second part; 33: second side wall; 34: third side wall; 35: fourth side wall;

[0030] 4: second insulating member;

[0031] 5: third insulating member; 51: first insulating section; 52: second insulating section;

[0032] 6: circuit board;

[0033] A: first direction; B: second direction; C: radial direction of the yoke portion. DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover not exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, and are not intended to describe a particular order or primary and secondary relationship.

[0036] In the present application, the phrase "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiments, nor are they necessarily mutually exclusive or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "attachment" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] The term "and / or" in the present application is only used to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0039] The "multiple" appearing in the present application refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0040] An insulation layer is arranged between the motor stator stack and the coil, and the magnetic bearing stack and the coil, which not only improves the insulation performance, but also protects the coil from being scratched by the sharp silicon steel sheet stack. The insulation layer mainly has four methods of laying insulation paper, coating, setting insulation shell and encapsulating, and the appropriate insulation layer can be selected according to the production batch and product requirements.

[0041] Laying insulation paper needs manual placement, which takes a long time and has poor consistency, and is mainly applied in prototype testing or small batch trial production stage. The coating process generally has a thickness of 0.4mm-0.8mm, and the thicker coating thickness will affect the slot fill rate, and pinholes, bubbles or cracks may occur at the sharp edge, which will affect the insulation performance, so the coating process is generally used in situations where the slot fill rate requirement is not high. The insulation shell can be formed in large quantities by injection molding or small quantities by 3D printing, but using injection molding process to form the insulation shell needs to open the mold, which has high cost; and the 3D printed insulation shell has uneven thickness and high scrap rate. Encapsulation is generally applied in automatic production line and is suitable for large-scale production. After automatic riveting is completed, it is directly injection molded, which has high automation degree, uniform thickness and good consistency.

[0042] However, in the prototype trial or small batch trial stage, the method of laying 0.15mm, 0.2mm, 0.25mm or 0.3mm thick insulation paper on the motor stator stack and the magnetic bearing stack is generally adopted to play the role of insulation and protection. The insulation paper is generally made of polyimide film and polyaramid paper bonded together, which has good heat resistance, insulation and paint absorption capacity.

[0043] The insulation paper is generally hard, and needs to be cut into the required shape by hand with a tool during the prototype stage and small batch trial stage, which has low efficiency and poor consistency. Moreover, the insulation paper is not easy to fold, and is very easy to rebound after folding. When the insulation paper is bonded to the motor stator stack or the magnetic bearing stack, it is easy to warp, which leads to the failure of the coil to be assembled to the stack teeth, greatly affecting the consistency and reliability of the motor stator and the magnetic bearing assembly, and reducing the assembly efficiency.

[0044] In view of this, reference is made to Figure 1 and Figure 2The embodiment of the present application provides a stator 1 assembly, which comprises a stator 1, a plurality of coils 2 and a plurality of first insulation pieces 3, the stator 1 comprises a yoke portion 11 and a plurality of tooth portions 12, each tooth portion 12 is arranged on the inner side of the radial direction C of the yoke portion 11 and extends inward along the radial direction C of the yoke portion 11, and the plurality of tooth portions 12 are arranged at intervals along the circumferential direction of the yoke portion 11; the plurality of coils 2 correspond to the plurality of tooth portions 12 one by one, each coil 2 is sleeved on the corresponding tooth portion 12; the plurality of first insulation pieces 3 are sleeved on the corresponding tooth portion 12 and arranged between the corresponding tooth portion 12 and the corresponding coil 2; wherein along the circumferential direction of the tooth portion 12, the first insulation piece 3 comprises a plurality of side walls arranged in sequence, two adjacent side walls are connected through a connecting wall 31, and the structural strength of the connecting wall 31 is less than that of the side wall.

[0045] The stator 1 assembly provided by the embodiment of the present application is characterized in that the first insulation piece 3 is sleeved on the tooth portion 12 and arranged between the tooth portion 12 and the coil 2, so that the insulation between the tooth portion 12 and the coil 2 is realized, and the scratch of the tooth portion 12 on the coil 2 is reduced. The two adjacent side walls of the first insulation piece 3 are connected through the connecting wall 31, the structural strength of the connecting wall 31 is less than that of the side wall, the first insulation piece 3 is easy to fold, and the first insulation piece 3 is not easy to rebound or edge after being folded, so that the influence of the first insulation piece 3 on the installation of the coil 2 is reduced, and the assembly quality and assembly efficiency of the first insulation piece 3 installed on the stator 1 are improved.

[0046] It should be understood that the side wall and the connecting wall 31 of the first insulation piece 31 are an integral structure.

[0047] Optionally, a first through hole 310 is arranged on the connecting wall 31, the first through hole 310 penetrates through the connecting wall 31 along the thickness direction of the connecting wall 31, the first through hole 310 is a plurality of and the plurality of first through holes 310 are arranged at intervals along the radial direction C of the yoke portion 11.

[0048] Along the radial direction C of the yoke portion 11, the connecting wall 31 is provided with a plurality of first through holes 310 arranged at intervals, and the arrangement of the first through hole 310 weakens the structural strength of the connecting wall, that is, a plurality of first through holes 310 arranged at intervals along the radial direction C of the yoke portion 11 are arranged between two adjacent side walls, so that the first insulation piece 3 is easy to fold and not easy to rebound after being folded, thereby reducing the influence of the first insulation piece 3 on the coil 2 and improving the structural stability of the first insulation piece 3 and the assembly quality and assembly efficiency.

[0049] In an optional embodiment, a first groove is arranged on the connecting wall 31 and penetrates through both sides of the connecting wall 31 along the radial direction C of the yoke portion 11, or the thickness of the connecting wall 31 is less than the thickness of the side wall.

[0050] That is, a first groove extending along the radial direction C of the yoke portion 11 is arranged between two adjacent side walls, and the first groove extends through the connecting wall 31 along the radial direction of the yoke portion 22, the first groove weakens the connecting strength of the connecting wall 31 between the two adjacent side walls, so that the first insulating piece 3 is easy to fold, and after folding, it is not easy to rebound, thereby reducing the influence of the first insulating piece 3 on the coil 2, and improving the structural stability of the first insulating piece 3, improving the assembly quality and assembly efficiency.

[0051] Alternatively, the connecting wall 31 is thinned to weaken the connecting strength between the two adjacent side walls, so that the first insulating piece 3 is easy to fold, and after folding, it is not easy to rebound, thereby reducing the influence of the first insulating piece 3 on the coil 2, and improving the structural stability of the first insulating piece 3, improving the assembly quality and assembly efficiency.

[0052] In yet another optional embodiment, a plurality of grooves are arranged on the connecting wall 31 and are spaced apart along the radial direction C of the yoke portion 11, as long as the strength of the connecting wall 31 can be weakened.

[0053] Optionally, referring to Figure 3 and Figure 4 , the plurality of side walls include a first side wall 32, a second side wall 33, a third side wall 34, and a fourth side wall 35, the first side wall 32 is arranged opposite to the third side wall 34 along a first direction A, the second side wall 33 is arranged opposite to the fourth side wall 35 along a second direction B, the first direction A is parallel to the axial direction of the yoke portion 11, and the first direction A, the second direction B, and the radial direction C of the yoke portion 11 are perpendicular to each other.

[0054] The first side wall 32, the second side wall 33, the third side wall 34, and the fourth side wall 35 are sequentially connected, the connecting wall 31 is connected between the first side wall 32 and the second side wall 33, the connecting wall 31 is connected between the second side wall 33 and the third side wall 34, the connecting wall 31 is connected between the third side wall 34 and the fourth side wall 35, and the connecting wall 31 is connected between the fourth side wall 35 and the first side wall 32, the connecting wall 31 is provided with a first through hole 310 or at least one first groove or the thickness of the connecting wall 31 is thinned to weaken the strength of the connecting wall 31, so that the first insulating piece 3 is easy to fold, and after folding, it is not easy to rebound.

[0055] Specifically, the gear of the first side wall 32, the second side wall 33, the third side wall 34, and the fourth side wall 35 along the radial direction of the yoke portion 11 is equal to the size of the tooth portion 12 along the radial direction C of the yoke portion 11; the size of the first side wall 32 and the third side wall 34 along the second direction B is equal to the size of the tooth portion 12 along the second direction B; and the size of the second side wall 33 and the fourth side wall 35 along the axial direction of the yoke portion 11 is equal to the size of the tooth portion 12 along the axial direction of the yoke portion 11.

[0056] Optionally, along the second direction B, the first side wall 32 comprises a first part 321 and a second part 322, the first part 321 is spaced apart from the second part 322, the first part 321 is connected with the second side wall 33 through a connecting wall 31, and the second part 322 is connected with the fourth side wall 35 through a connecting wall 31.

[0057] When the first insulating part 3 needs to be installed on the tooth part 12, the first part 321 and the second part 322 can be unfolded, the second side wall 33, the third side wall 34 and the fourth side wall 35 of the first insulating part 3 are in contact with the tooth part 12, and then the first part 321 and the second part 322 are folded to cover the tooth part 12. The first part 321 and the second part 322 are spaced apart, so that the first insulating part 3 is easily sleeved on the tooth part 12, the assembly efficiency is improved, and the scratch on the tooth part 12 when the first insulating part 3 is sleeved on the tooth part 12 is reduced. In addition, the first part 321 and the second part 322 are spaced apart, the overlap between the first part 321 and the second part 322 is reduced, the thickness of the first insulating part 3 is reduced, and the coil 2 is easily sleeved on the tooth part 12, and the assembly efficiency is improved.

[0058] Optionally, the first part 321 and the second part 322 are fixedly connected with the tooth part 12 through a first glue layer (not shown). After the first insulating part 3 is sleeved on the tooth part 12, the first part 321 and the second part 322 are respectively folded and attached to the tooth part 12, and then the first glue is brushed on the tooth part 12. The first glue layer is formed by solidifying the first glue, so that the first part 321 and the second part 322 are quickly attached and pasted on the tooth part 12, and the assembly efficiency is improved.

[0059] In an optional embodiment, the side of the first insulating part 3 in contact with the tooth part 12 is fixedly bonded with the tooth part 12 through the first glue layer.

[0060] In an optional embodiment, the side of the first insulating part 3 in contact with the tooth part 12 is provided with a bonding layer to bond and fix the first side wall 32, the second side wall 33, the third side wall 34 and the fourth side wall 35 of the first insulating part 3 with the tooth part 12. It should be understood that the first part 321 and the second part 322 are also bonded and fixed with the tooth part 12 through the bonding layer.

[0061] Optionally, the first part 321 and the second part 322 are also fixedly connected through a second glue layer (not shown), and the connecting wall 31 is also coated with a third glue layer (not shown) on the side in the thickness direction. The solidification speed of the second glue layer and the solidification speed of the third glue layer are both less than the solidification speed of the first glue layer.

[0062] The first insulating part 3 is sleeved on the tooth portion 12, and the second glue is brushed on the first portion 321 and the second portion 322 to form a second glue layer, so as to further fix the first portion 321 and the second portion 322 and improve the insulation of the connection between the first portion 321 and the second portion 322. The third glue is coated on the connecting wall 31 between the adjacent two side walls to form a third glue layer, and the third glue layer can block the first through hole 310 or the first groove on the connecting wall, so as to improve the strength of the first insulating part 3 installed on the tooth portion 12, reduce the insulation failure of the first insulating part 3, and reduce the risk of short circuit caused by the contact between the coil 2 and the tooth portion 12 due to the insulation failure of the first insulating part 3. The second glue layer and the third glue layer have insulation.

[0063] The solidification speed of the first glue layer is greater than that of the second glue layer and the third glue layer, the first glue layer is used to quickly fix the first portion 321 and the second portion 322 to the tooth portion 12, and the second glue layer and the third glue layer are used to improve the strength and insulation performance of the first insulating part 3. In addition, since the solidification speed of the second glue layer and the third glue layer is slow, the coil 2 is sleeved on the first insulating part 3 after the second glue layer and the third glue layer are coated on the first insulating part 3, and the first glue layer and the third glue layer can simultaneously fix the coil 2.

[0064] Optionally, the stator 1 assembly further comprises a circuit board 6 and a second insulating part 4, along the axial direction of the yoke portion 11, the circuit board 6 is arranged on one side of the yoke portion 11, and the second insulating part 4 is arranged between the yoke portion 11 and the circuit board 6; along the radial direction C of the yoke portion 11, the radial outer circumferential surface of the second insulating part 4 does not protrude outward from the radial C outer circumferential surface of the yoke portion 11.

[0065] The second insulating part 4 is arranged between the circuit board 6 and the yoke portion 11 of the stator 1 to insulate the yoke portion 11 of the stator 1 and the circuit board 6; the radial outer circumferential surface of the second insulating part 4 does not protrude outward from the radial C outer circumferential surface of the yoke portion 11, so as to reduce the interference between the second insulating part 4 and the inner wall of the shell when the stator 1 assembly is installed into the shell, so that the stator 1 assembly can be smoothly assembled.

[0066] Optionally, with reference to Figure 1The stator 1 assembly further comprises a third insulation piece 5, the third insulation piece 5 is sleeved on the tooth portion 12, along the radial direction of the stator 1, the third insulation piece 5 is located between the yoke portion 11 and the coil 2; along the axial direction of the yoke portion 11, the tooth portion 12 comprises a first side surface 121 and a second side surface 122 arranged oppositely, the coil 2 comprises a first coil segment 21 and a second coil segment 22 arranged oppositely, the first coil segment 21 is adjacent to the first side surface 121, the second coil segment 22 is adjacent to the second side surface 122, and the first coil segment 21 is provided with a lead-out wire bundle 23; along the axial direction of the yoke portion 11, the third insulation piece 5 comprises a first insulation segment 51 and a second insulation segment 52 arranged oppositely, the first insulation segment 51 is arranged between the first coil segment 21 and the yoke portion 11, and the second insulation segment 52 is arranged between the second coil segment 22 and the yoke portion 11, and along the axial direction of the yoke portion 11, the size of the first insulation segment 51 is not greater than the distance between the lead-out wire bundle 23 and the first side surface 121.

[0067] Along the axial direction of the yoke portion 11, the first coil segment 21 and the first insulation segment 51 are correspondingly arranged, and the second coil segment 22 and the second insulation segment 52 are correspondingly arranged, the first coil segment 21 and the first insulation segment 51 are close to the first side surface 121, the second coil segment 22 and the second insulation segment 52 are close to the second side surface 122, and the size of the first insulation segment 51 is not greater than the distance between the lead-out wire bundle 23 and the first side surface 121. That is, when the lead-out wire bundle 23 is led out to be connected with the circuit board 6, the first insulation segment 51 does not contact the lead-out wire bundle 23, thereby reducing the damage of the first insulation segment 51 to the lead-out wire bundle 23.

[0068] Optionally, with reference to Figure 1 and Figure 2 The stator 1 assembly further comprises a third insulation piece 5, the third insulation piece 5 is sleeved on the tooth portion 12, along the radial direction of the stator 1, the third insulation piece 5 is located between the yoke portion 11 and the coil 2; along the axial direction of the yoke portion 11, the tooth portion 12 comprises a first side surface 121 and a second side surface 122 arranged oppositely, the coil 2 comprises a first coil segment 21 and a second coil segment 22 arranged oppositely, the first coil segment 21 is adjacent to the first side surface 121, the second coil segment 22 is adjacent to the second side surface 122, and the first coil segment 21 is provided with a lead-out wire bundle 23; along the axial direction of the yoke portion 11, the third insulation piece 5 comprises a first insulation segment 51 and a second insulation segment 52 arranged oppositely, the first insulation segment 51 is arranged between the first coil segment 21 and the yoke portion 11, and the second insulation segment 52 is arranged between the second coil segment 22 and the yoke portion 11, and the first insulation segment 51 is provided with an avoiding gap avoiding the lead-out wire bundle 23.

[0069] The first insulation segment 51 is provided with an avoiding gap at the lead-out end of the lead-out wire bundle 23, when the lead-out wire bundle 23 is led out to be connected with the circuit board 6, the first insulation segment 51 does not contact the lead-out wire bundle 23, thereby reducing the damage of the first insulation segment 51 to the lead-out wire bundle 23.

[0070] It should be understood that the first insulation piece 3 can be provided with a notch on the first insulation section 51 to form an avoiding notch, which can be decided according to needs whether to penetrate the first insulation section 51 along the axial direction of the stator 1.

[0071] In a second aspect, the embodiments of the present application provide a magnetic suspension rotating device, which comprises the stator 1 assembly of any of the above embodiments. The stator 1 assembly can be a motor stator 1 assembly, or a magnetic bearing stator 1 assembly.

[0072] The first insulation piece 3, the second insulation piece 4 and the third insulation piece 5 in the present application can all adopt 0.2mm-thick insulation paper, which is cut by a laser marking machine. The shape and size of the insulation paper are drawn in a CAD drawing, and are arranged and combined, and then the CAD drawing is imported into the laser marking machine. The whole insulation paper is placed under the laser marking machine for automatic cutting, and a large number of two-dimensional drawings of various shapes can be printed at one time. The first insulation piece 3, the second insulation piece 4 and the third insulation piece 5 in the present application can all be directly printed by the laser marking machine; the first insulation piece 3 is first cut into a shape before folding by the laser marking machine, as shown in FIG. 6; then the first through holes 310 are arranged at a specified distance, and the first insulation piece 3 is folded along the row of first through holes 310, as shown in FIG. 7, so that the first insulation piece 3 is easily shaped and is not easy to rebound, and the folded and shaped insulation paper can be easily sleeved on the magnetic bearing laminated tooth. Figure 4 Figure 3 The first insulation piece 3 is first cut into a shape before folding by the laser marking machine, as shown in FIG. 6; then the first through holes 310 are arranged at a specified distance, and the first insulation piece 3 is folded along the row of first through holes 310, as shown in FIG. 7, so that the first insulation piece 3 is easily shaped and is not easy to rebound, and the folded and shaped insulation paper can be easily sleeved on the magnetic bearing laminated tooth.

[0073] The first insulation piece 3 is first cut into a shape before folding by the laser marking machine, as shown in FIG. 6; then the first through holes 310 are arranged at a specified distance, and the first insulation piece 3 is folded along the row of first through holes 310, as shown in FIG. 7, so that the first insulation piece 3 is easily shaped and is not easy to rebound, and the folded and shaped insulation paper can be easily sleeved on the magnetic bearing laminated tooth.

[0074] It should be understood that the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0075] ​The various embodiments described in this specification are described using a numbering of embodiments approach: these are each treated as independent embodiments or else groups of embodiments. Each of these embodiments can be combined with any other embodiment(s) described herein. All combinations are considered to be part of the present application.

[0076] The above description is implemented only as an example of the present application, and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0077] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope of the appended claims.

Claims

1. A stator assembly characterized by, The stator comprises a yoke and a plurality of tooth portions, each of the tooth portions is arranged on the radially inner side of the yoke and extends radially inwardly along the yoke, and the plurality of tooth portions are arranged in a circumferential direction of the yoke. A plurality of coils are provided, each of the coils is arranged on a corresponding tooth portion. A plurality of first insulation members are arranged on the corresponding tooth portions and between the corresponding tooth portions and the corresponding coils. In the circumferential direction of the tooth portion, the first insulation member comprises a plurality of side walls arranged in sequence, and two adjacent side walls are connected by a connecting wall, the structural strength of the connecting wall is less than that of the side wall. The connecting wall is provided with a first through hole, the first through hole penetrates the connecting wall in the thickness direction of the connecting wall, and a plurality of first through holes are arranged in the radial direction of the yoke.

2. The stator assembly according to claim 1, characterized in that The plurality of side walls comprise a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall and the third side wall are arranged opposite to each other in a first direction, the second side wall and the fourth side wall are arranged opposite to each other in a second direction, the first direction is parallel to the axial direction of the yoke, and the first direction, the second direction and the radial direction of the yoke are perpendicular to each other.

3. The stator assembly of claim 2, wherein, In the second direction, the first side wall comprises a first part and a second part, the first part and the second part are arranged in sequence, the first part is connected to the second side wall by a connecting wall, and the second part is connected to the fourth side wall by a connecting wall.

4. The stator assembly of claim 3, wherein, The first part and the second part are fixedly connected to the tooth portion by a first adhesive layer.

5. The stator assembly of claim 4, wherein, The first part and the second part are further fixedly connected by a second adhesive layer, the connecting wall is further coated with a third adhesive layer on the side in the thickness direction, and the solidification speed of the second adhesive layer and the third adhesive layer is less than that of the first adhesive layer.

6. The stator assembly of claim 5, wherein, The stator assembly further comprises a circuit board and a second insulation member, the circuit board is arranged on one side of the yoke in the axial direction of the yoke, and the second insulation member is arranged between the yoke and the circuit board.

7. The stator assembly of claim 1, wherein, In the radial direction of the yoke, the radial outer circumferential surface of the second insulation member does not protrude from the radial outer circumferential surface of the yoke. The stator assembly further comprises a third insulation member, the third insulation member is arranged on the tooth portion, and in the radial direction of the stator, the third insulation member is located between the yoke and the coil.

8. The stator assembly of claim 1, wherein, In the axial direction of the yoke, the tooth portion comprises a first side surface and a second side surface arranged opposite to each other, the coil comprises a first coil segment and a second coil segment arranged opposite to each other, the first coil segment is adjacent to the first side surface, the second coil segment is adjacent to the second side surface, and the first coil segment is provided with a lead wire bundle. In the axial direction of the yoke, the third insulation member comprises a first insulation segment and a second insulation segment arranged opposite to each other, the first insulation segment is arranged between the first coil segment and the yoke, and the second insulation segment is arranged between the second coil segment and the yoke, and in the axial direction of the yoke, the size of the first insulation segment is not greater than the distance between the lead wire bundle and the first side surface. ​ 9. The stator assembly of claim 1, wherein, The stator assembly further comprises a third insulation member, the third insulation member is sleeved on the tooth portion, and the third insulation member is located between the yoke portion and the coil along the radial direction of the stator; The tooth portion comprises oppositely arranged first and second side surfaces along the axial direction of the yoke portion, the coil comprises oppositely arranged first and second coil sections, the first coil section is adjacent to the first side surface, the second coil section is adjacent to the second side surface, and the first coil section is provided with a lead wire bundle; The third insulation member comprises oppositely arranged first and second insulation sections along the axial direction of the yoke portion, the first insulation section is arranged between the first coil section and the yoke portion, the second insulation section is arranged between the second coil section and the yoke portion, and the first insulation section is provided with a relief gap for avoiding the lead wire bundle.

10. A magnetic levitation rotating apparatus characterized by comprising: The stator assembly comprises the stator assembly according to any one of claims 1 to 9.

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