Magnetic suspension axial bearing, stator and iron core thereof, compressor and method

Abstract

The invention provides a magnetic suspension axial bearing and a stator, an iron core, a compressor and a method thereof, the stator iron core comprises a first sub-block and a second sub-block, the first sub-block is provided with an iron core inner ring, the second sub-block is provided with an iron core outer ring, the iron core inner ring is used for being sleeved and fixed on the outer side of an insulation framework, and the insulation framework is sleeved and fixed on the outer side of the first sub-block. The annular winding groove, deviating from one side of the iron core inner ring, of the insulating framework extends in the circumferential direction of the iron core inner ring; wherein the second sub-block is used for being assembled on the first sub-block, so that the iron core outer ring is arranged on the outer side of the iron core inner ring in a sleeving manner, and an annular groove for accommodating the insulating framework is formed between the iron core outer ring and the iron core inner ring. According to the invention, the winding difficulty can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of magnetic levitation axial bearing technology, specifically relating to a magnetic levitation axial bearing, its stator and core, compressor, and method. Background Technology

[0002] Magnetic bearings are widely used in high-speed and ultra-high-speed applications due to their characteristics of no mechanical contact, no need for lubrication, high critical speed, long service life, and high reliability. Magnetic bearings include magnetic axial bearings, such as... Figure 1 As shown, the existing magnetic levitation axial bearing includes a stator core 1', an insulating frame 3', and a coil 2'. The stator core 1' is a one-piece structure, with an annular groove 4' at the center of one end. An inner ring 5' is formed inside the annular groove 4', and an outer ring 6' is formed outside the annular groove 4'. The insulating frame 3' is fitted onto the inner ring 5', and an annular winding groove 31' is located on the side of the insulating frame 3' facing away from the inner ring 5'. The annular winding groove 31' extends circumferentially along the inner ring 5'. The coil 2' is wound in the annular winding groove 31'. The magnetic field generated by the energized coil 2' is distributed approximately uniformly through the magnetic circuit formed by the stator core 1'.

[0003] Before being assembled into the annular groove 4', the insulating frame 3' needs to be wound to wind the aforementioned coil 2' within the annular winding groove 31'. During winding, the insulating frame 3' needs to be secured onto a cylindrical winding fixture. After winding, the insulating frame 3' with the coil 2' is removed from the cylindrical winding fixture and assembled into the annular groove 4' of the stator core 1'. The entire winding process requires the use of a cylindrical winding fixture to assist in winding the insulating frame 3'. The assembly and removal of the insulating frame 3' from the cylindrical winding fixture during winding increases the bearing manufacturing process, resulting in lower bearing processing efficiency. Therefore, this problem needs to be addressed. Summary of the Invention

[0004] Therefore, the present invention provides a magnetic levitation axial bearing, its stator and core, compressor, and method, which can solve the technical problem in the prior art that the use of cylindrical winding fixtures to assist in the winding of the insulating skeleton increases the bearing manufacturing process and leads to low bearing processing efficiency.

[0005] To address the aforementioned problems, the present invention provides a stator core for a magnetically levitated axial bearing, comprising a first segment and a second segment. The first segment has an inner core ring, and the second segment has an outer core ring. The inner core ring is used for securing an insulating skeleton to its outer side, such that an annular winding groove on the side of the insulating skeleton facing away from the inner core ring extends circumferentially along the inner core ring. The second segment is used for assembly onto the first segment, such that the outer core ring is fitted onto the outer side of the inner core ring, and an annular groove for accommodating the insulating skeleton is formed between the outer core ring and the inner core ring.

[0006] In some implementations, the second segment is used to be detachably assembled onto the first segment.

[0007] In some embodiments, the first segment further includes a base, and the inner ring of the iron core protrudes from the end face of the base; The first block is used for the assembly of the second block via the base.

[0008] In some embodiments, the second segment is assembled onto the base via the outer ring of the iron core; wherein, the end face on the base from which the inner ring of the iron core protrudes is defined as the first end face, and the base is used for assembly of the outer ring of the iron core via the first end face.

[0009] The present invention also provides a stator for a magnetically levitated axial bearing, which includes the stator core of the magnetically levitated axial bearing described in any one of the above-mentioned embodiments.

[0010] In some embodiments, when the first segment further includes a base, and the inner ring of the iron core protrudes from the end face of the base, the outer side wall of the inner ring of the iron core cooperates with the end face of the base to form a first groove, and the insulating frame has a first protrusion; wherein, the first protrusion is used to insert into the first groove to prevent the insulating frame from coming out along the axial direction of the stator core toward the side away from the base.

[0011] In some embodiments, the insulating frame is a one-piece molded structure, and the combined structure formed by the inner ring of the iron core and the base is also a one-piece molded structure.

[0012] In some embodiments, the stator of the magnetic levitation axial bearing further includes a coil and an insulating filler, the coil being wound in the annular winding groove, and the insulating filler filling the space between the coil and the outer ring of the iron core.

[0013] In some embodiments, when the first segment further includes a base, and the inner ring of the iron core protrudes from the end face of the base, the first segment is used for assembling the second segment through the base, and the second segment is assembled onto the base through the outer ring of the iron core. The end face on the base where the inner ring of the iron core protrudes is defined as the first end face, and the base is used for assembling the outer ring of the iron core through the first end face. The inner sidewall of the outer ring of the iron core mates with the first end face to form a second groove, and the insulating filler has a second protrusion; wherein the second protrusion is used to insert into the second groove to prevent the insulating filler from coming out along the axial direction of the stator iron core toward the side away from the base.

[0014] The present invention also provides a magnetic levitation axial bearing, which includes the stator core of the magnetic levitation axial bearing described in any one of the above-mentioned methods; or includes the stator of the magnetic levitation axial bearing described in any one of the above-mentioned methods.

[0015] The present invention also provides a compressor comprising a stator core of a magnetic levitation axial bearing as described above; or a stator comprising a magnetic levitation axial bearing as described above; or a magnetic levitation axial bearing as described above.

[0016] The present invention also provides a method for assembling the stator of the magnetic levitation axial bearing described in any one of the above claims, characterized by comprising the following steps: Step S1: The insulating frame is fitted onto the outside of the inner ring of the iron core, and the insulating frame cooperates with the first block to form a first component; Step S2: Wind wire onto the first component to form a coil within the annular winding groove; Step S3: Assemble the second block onto the first block.

[0017] The magnetic levitation axial bearing, its stator and core, compressor, and method provided by this invention have the following beneficial effects: 1. Compared to the integrated structure of the stator core in the prior art, this invention designs the stator core as a split structure composed of a first block and a second block, and sets the inner ring and outer ring of the core on the first block and the second block respectively. This makes the columnar structure formed by the inner ring of the core on the first block similar to the structure of the cylindrical winding fixture in the prior art, thus allowing the first block to be used as the cylindrical winding fixture in the prior art. Specifically, when assembling the bearing, the second block can be assembled last. After the insulating frame is fixed onto the inner ring of the core, winding can begin. Since the first block serves as the cylindrical winding fixture in the prior art, the assembly and removal process of the insulating frame from the original cylindrical winding fixture can be eliminated compared to the prior art, thereby simplifying the bearing manufacturing process and improving the bearing processing efficiency.

[0018] 2. This invention, through its designed self-locking structure, eliminates the need for threaded connections between the insulating frame and the stator core, simplifying the structure and installation of the insulating frame and thus eliminating the need for a separate structure for fixing the insulating frame. Furthermore, this invention utilizes the assembly relationship between the inner and outer rings of the core to form an annular groove for accommodating the insulating frame, simplifying the stator core structure. Compared to existing technologies, it eliminates the need to machine an annular groove on the stator core, reducing the difficulty of parts processing and increasing the yield rate. Attached Figure Description

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of a magnetic levitation axial bearing in the prior art; Figure 2 This is a schematic diagram of the structure of a magnetically levitated axial bearing provided in one embodiment of the present invention; Figure 3 This is an assembly diagram of a first block and a second block provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a first component provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a second block provided in an embodiment of the present invention; Figure 6 This is an exploded view of a magnetic levitation axial bearing provided in an embodiment of the present invention.

[0021] The reference numerals in the attached figures are as follows: 1. First segment; 2. Insulating frame; 3. Coil; 4. Insulating filler; 5. Outer ring of iron core; 6. Second segment; 10. First assembly; 11. Base; 12. Inner ring of iron core; 31. First protrusion; 41. Second protrusion; 51. Inner wall of outer ring of iron core; 101. First groove; 102. Second groove; 103. Annular groove; 111. End face of base; 112. First end face; 121. Outer wall of inner ring of iron core; 201. Annular winding groove. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0026] See also Figure 2-6 As shown, according to an embodiment of the present invention, a stator core for a magnetically levitated axial bearing is provided, comprising a first block 1 and a second block 6. The first block 1 has an inner core ring 12, and the second block 6 has an outer core ring 5. The inner core ring 12 is used for an insulating frame 2 to be fitted onto its outer side, such that an annular winding groove 201 of the insulating frame 2 on the side opposite to the inner core ring 12 extends circumferentially along the inner core ring 12. The second block 6 is used for assembly onto the first block 1, such that the outer core ring 5 is fitted onto the outer side of the inner core ring 12, and an annular groove 103 for accommodating the insulating frame 2 is formed between the outer core ring 5 and the inner core ring 12.

[0027] Compared to the integrated structure of the stator core in the prior art, this invention designs the stator core as a split structure composed of a first block 1 and a second block 6, and sets the inner ring 12 and the outer ring 5 of the core on the first block 1 and the second block 6 respectively. This makes the columnar structure formed by the inner ring 12 on the first block 1 similar to the structure of the cylindrical winding fixture in the prior art, thus allowing the first block 1 to be used as the cylindrical winding fixture in the prior art. Specifically, when assembling the bearing, the second block 6 can be assembled last. After the insulating frame 2 is fixed onto the inner ring 12 of the core, winding can begin. Since the first block 1 serves as the cylindrical winding fixture in the prior art, the assembly and removal process of the insulating frame 2 from the original cylindrical winding fixture can be eliminated compared to the prior art, thereby simplifying the bearing manufacturing process and improving the bearing processing efficiency.

[0028] In addition, since the solution of the present invention can eliminate the original cylindrical winding tooling in the prior art, it also has the advantage of reducing winding costs.

[0029] In some embodiments, the aforementioned second block 6 is used to be detachably assembled onto the first block 1.

[0030] In the example above, since the second block 6 is detachable, assembly is relatively convenient, and it can be replaced or repaired in a timely manner if damaged.

[0031] In some implementations, such as Figure 4 As shown, the aforementioned first block 1 may also include a base 11, and the aforementioned inner ring 12 of the iron core protrudes from the end face 111 of the base. In this way, the assembly formed by the base 11 and the inner ring 12 of the iron core can be used as a winding tool for winding, which is beneficial for convenient winding.

[0032] The aforementioned first block 1 can be assembled with the second block 6 via the base 11, providing an installation position for the installation of the second block 6.

[0033] In some implementations, such as Figure 4 As shown, the aforementioned inner core ring 12 can be integrally formed on the base 11, which can improve the connection stability between the inner core ring 12 and the base 11.

[0034] In some implementations, such as Figure 2-3 As shown, the aforementioned second block 6 can be assembled onto the base 11 via the outer ring 5 of the iron core, so as to achieve the purpose of assembling the second block 6 onto the first block 1.

[0035] In a specific application example, such as Figure 3 As shown, the end face of the protruding inner ring 12 of the iron core on the aforementioned base 11 is defined as the first end face 112, and the base 11 can be used to assemble the outer ring 5 of the iron core through the first end face 112.

[0036] In the above example, by setting the inner core ring 12 and the outer core ring 5 on the same end face 112 of the base 11, it is advantageous to achieve the effect of placing the outer core ring 5 on the outside of the inner core ring 12 after the assembly of the outer core ring 5 is completed, and forming an annular groove for accommodating the insulating skeleton 2 between the outer core ring 5 and the inner core ring 12.

[0037] In some implementations, such as Figure 2-3 As shown, when the aforementioned second segment 6 is detachably assembled onto the first segment 1, and the first segment 1 also includes a base 11, with the inner core ring 12 protruding from the end face 111 of the base, the first segment 1 is assembled to the second segment 6 via the base 11, and the second segment 6 is assembled to the base 11 via the outer core ring 5; and the end face on the base 11 where the inner core ring 12 protrudes is defined as the first end face 112. When the base 11 is assembled to the outer core ring 5 via the first end face 112, the outer core ring 5 can be fixedly connected to the base 11 by threaded fasteners such as screws, and the outer core ring 5 abuts against the first end face 112 of the base 11. Specifically, the side of the outer core ring 5 opposite to the first end face 112 may have a threaded hole, and the first end face 112 may have a through hole extending to the other end of the base 11, through which threaded fasteners such as screws can be threaded and connected to the threaded hole.

[0038] In some embodiments, the number of the aforementioned threaded holes is two or more, and they are evenly distributed along the circumference of the outer ring 5 of the iron core. The number of the aforementioned through holes is equal to the number of threaded holes, and they correspond one-to-one.

[0039] In some implementations, such as Figure 2As shown, the present invention also provides a stator for a magnetically levitated axial bearing, which may include the stator core of the magnetically levitated axial bearing described above.

[0040] In some implementations, such as Figure 4 As shown, when the aforementioned first segment 1 also includes a base 11, and the inner ring 12 of the iron core protrudes from the end face 111 of the base, the outer wall 121 of the inner ring 12 of the iron core and the end face 111 of the base cooperate to form a first groove 101, and the insulating frame 2 has a first protrusion 31. The first protrusion 31 is used to insert into the first groove 101 to prevent the insulating frame 2 from dislodging from the base 11 along the axial direction of the stator core.

[0041] In the above example, the first protrusion 31 on the insulating frame 2 cooperates with the first groove 101 to form a self-locking structure, which can prevent the insulating frame 2 from falling off the first block 1 and improve the installation stability of the insulating frame 2.

[0042] In some implementations, such as Figure 4 As shown, both the first groove 101 and the first protrusion 31 can be annular and extend circumferentially along the inner ring 12 of the iron core. This allows the insulating frame 2 to be embedded in the first groove 101 in the circumferential direction, thereby further improving the connection stability between the insulating frame 2 and the first block 1 and further preventing the insulating frame 2 from coming off the first block 1.

[0043] In some implementations, such as Figure 4 As shown, the outer wall of the aforementioned stator inner ring 12 can be in the shape of a frustum, and the outer diameter of the stator inner ring 12 gradually increases in the axial direction away from the base 11. This facilitates the processing of the outer wall of the stator inner ring 12 in conjunction with the first end face 112 to form the first groove portion 101.

[0044] In some implementations, such as Figure 4 As shown, the aforementioned insulating frame 2 can be an integrally molded structure, and the combined structure formed by the inner ring 12 of the iron core and the base 11 is also an integrally molded structure. In this way, the insulating frame 2 can be completely embedded in the first groove 101, realizing the complete self-locking of the insulating frame 2, making it impossible for the insulating frame 2 to detach from the first segment 1, and further improving the connection stability between the insulating frame 2 and the first segment 1.

[0045] It should be noted that when the insulating frame 2 is an integrally molded structure, and the combined structure formed by the inner ring 12 of the iron core and the base 11 is also an integrally molded structure, in order to assemble the insulating frame 2 onto the first block 1, the insulating frame 2 can be injection molded onto the inner ring 12 of the iron core using an injection molding process.

[0046] In some implementations, such as Figure 2 As shown, the stator of the aforementioned magnetic levitation axial bearing also includes a coil 3 and an insulating filler 4. The coil 3 is wound in an annular winding groove 201, and the insulating filler 4 is filled between the coil 3 and the outer ring 5 of the iron core.

[0047] In the above example, by filling the gap between the coil 3 and the outer ring 5 of the iron core with an insulating filler 4, the insulation performance between the coil 3 and the outer ring 5 of the iron core can be improved. The insulating filler 4 serves as an insulating seal, encapsulating the coil 3 within the insulating frame 2.

[0048] In some implementations, such as Figure 2 As shown, when the aforementioned first segment 1 also includes a base 11, and the inner ring 12 of the iron core protrudes from the end face 111 of the base, the first segment 1 is used for the assembly of the second segment 6 through the base 11, and the second segment 6 is assembled onto the base 11 through the outer ring 5 of the iron core. The end face of the base 11 where the inner ring 12 of the iron core protrudes is defined as the first end face 112. When the base 11 is used for the assembly of the outer ring 5 of the iron core through the first end face 112, the inner sidewall of the outer ring 5 of the iron core cooperates with the first end face 112 to form a second groove 102, and the insulating filler 4 has a second protrusion 41. The second protrusion 41 is used to insert into the second groove 102 to prevent the insulating filler 4 from coming out along the axial direction of the stator core away from the base 11.

[0049] In the above example, the second protrusion 41 on the insulating filler 4 cooperates with the second groove 102 to form a self-locking structure, which can prevent the insulating filler 4 from coming out between the coil 3 and the outer ring 5 of the iron core, thus improving the installation stability of the insulating filler 4.

[0050] In some implementations, such as Figure 2 As shown, both the aforementioned second groove portion 102 and the second protrusion portion 41 can be annular and extend circumferentially along the outer ring 5 of the iron core. This allows the insulating filler 4 to form an isolation between the coil 3 and the outer ring 5 of the iron core along the circumferential direction, which can further improve the insulation performance between the coil 3 and the outer ring 5 of the iron core.

[0051] In some implementations, such as Figure 5 As shown, the inner wall of the aforementioned stator outer ring can be in the shape of a frustum, and the inner diameter of the stator outer ring gradually decreases along the axial direction away from the base 11. This facilitates the processing of the outer wall of the stator outer ring to fit with the first end face 112 to form the second groove portion 102.

[0052] Among them, such as Figure 3As shown, when the inner wall of the stator outer ring is frustoconical and the inner diameter of the stator outer ring gradually decreases along the axial direction away from the base 11, and the outer wall of the stator inner ring 12 is also frustoconical and the outer diameter of the stator inner ring 12 gradually increases along the axial direction away from the base 11, the aforementioned annular groove 103 is formed by the stator outer ring, stator inner ring 12 and base 11. The cross-sectional shape of the annular groove 103 is similar to a trapezoid, and the width of the trapezoid gradually decreases along the axial direction of the stator core away from the base 11.

[0053] In some implementations, such as Figure 2 As shown, the aforementioned insulating filler 4 can be a one-piece molded structure, which can improve the structural strength of the insulating filler 4.

[0054] In some embodiments, the aforementioned insulating filler 4 can be a potting compound, allowing the insulating filler 4 to be filled between the coil 3 and the outer ring 5 of the iron core through potting. The potting compound can be epoxy resin or other potting compounds with high structural strength.

[0055] Both the inner core ring 12 and the outer core ring 5 mentioned above can be made of 45# steel or other materials with good magnetic permeability. The aforementioned insulating frame 2 can be made of a material with high structural strength and insulation after curing. The aforementioned coil 3 can be wound with enameled wire.

[0056] In some embodiments, the present invention also provides a magnetic levitation axial bearing, which includes the stator core of any of the above-described magnetic levitation axial bearings; or includes the stator of any of the above-described magnetic levitation axial bearings.

[0057] In some embodiments, the present invention also provides a compressor that may include a stator core of any of the magnetic levitation axial bearings described above; or a stator that includes any of the magnetic levitation axial bearings described above; or a magnetic levitation axial bearing as described above.

[0058] In some embodiments, the present invention also provides a method for assembling the stator of any of the above-described magnetic levitation axial bearings, comprising the following steps: Step S1: The insulating frame 2 is fitted onto the outside of the inner ring 12 of the iron core, and the insulating frame 2 and the first block 1 cooperate to form the first component 10.

[0059] Step S2: Wind wire on the first component 10 to wind coil 3 in an annular winding groove 201.

[0060] Step S3: Assemble the second block 6 onto the first block 1.

[0061] Compared to the existing technology of fixing the insulating skeleton 2 onto a cylindrical winding fixture for winding, the present invention directly fixes the insulating skeleton 2 onto the inner ring 12 of the iron core of the first segment 1 for winding. By using the first segment 1 as a cylindrical winding fixture in the prior art during winding, the present invention eliminates the assembly and removal process of the insulating skeleton 2 from the original cylindrical winding fixture, thereby simplifying the bearing manufacturing process and improving the bearing processing efficiency.

[0062] In this invention, the insulating frame 2 can be injection molded onto the inner ring 12 of the iron core using an injection molding process. The insulating frame 2 mates with the inner ring 12 of the iron core, and is embedded in the first segment 1 to form a self-locking structure, eliminating the need for an additional structure to fix the insulating frame 2. The coil 3 is directly wound on the insulating frame 2, and the insulating frame 2 and the first segment 1 mate to form the first component 10. The first segment 1 can serve as a winding fixture. Specifically, the first segment 1 is cylindrical in shape, similar to the structure of the original cylindrical fixture in the prior art. The insulating frame 2 is self-locking on the first segment 1 and will not detach, allowing the first segment 1 to serve as a winding fixture to wind the enameled wire inside the insulating frame 2, thus eliminating the need for a dedicated winding fixture.

[0063] This invention replaces the existing mounting structure between the insulating frame 2 and the stator core by directly injection molding the insulating frame 2 onto the inner ring 12 of the iron core. This eliminates the need to machine grooves on the stator core, improving production efficiency and reducing processing costs. Simultaneously, a self-locking structure is designed to secure the insulating frame 2 to the first block 1, simplifying the structure and installation method of the insulating frame 2. The first block 1 can also serve as a winding fixture for mounting the insulating frame 2 during coil 3 winding, eliminating the need for additional winding fixtures and simplifying the production process.

[0064] This invention utilizes a self-locking structure to eliminate the need for threaded connections between the insulating frame 2 and the stator core, simplifying the structure and installation of the insulating frame 2 and eliminating the need for a separate structure for fixing it. Furthermore, the invention employs the assembly relationship between the inner ring 12 and the outer ring 5 of the core to form an annular groove 103 for accommodating the insulating frame 2, simplifying the stator core structure. Compared to the prior art method of machining annular grooves on a single stator core, this invention reduces the difficulty of part processing and increases the yield rate. Additionally, this invention injection molds the insulating frame 2 onto the first segment 1, using the first segment 1 as a winding fixture for mounting the insulating frame 2 to wind the coil 3. This simplifies the coil 3 manufacturing process, reduces the difficulty of coil 3 manufacturing, saves on winding tools, and improves processing efficiency.

[0065] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A stator core for a magnetically levitated axial bearing, characterized in that: The device includes a first block (1) and a second block (6). The first block (1) has an inner core ring (12), and the second block (6) has an outer core ring (5). The inner core ring (12) is used for securing the insulating skeleton (2) on its outer side, so that the annular winding groove (201) of the insulating skeleton (2) on the side away from the inner core ring (12) extends along the circumference of the inner core ring (12). The second block (6) is used to assemble onto the first block (1), so that the outer core ring (5) is fitted on the outer side of the inner core ring (12), and an annular groove (103) for accommodating the insulating skeleton (2) is formed between the outer core ring (5) and the inner core ring (12).

2. The stator core of the magnetic levitation axial bearing according to claim 1, characterized in that: The second block (6) is used to be assembled onto the first block (1) in a detachable manner.

3. The stator core of the magnetic levitation axial bearing according to claim 1 or 2, characterized in that: The first block (1) also includes a base (11), and the inner ring (12) of the iron core protrudes from the end face (111) of the base; The first block (1) is assembled with the second block (6) via the base (11).

4. The stator core of the magnetic levitation axial bearing according to claim 3, characterized in that: The second block (6) is assembled onto the base (11) via the outer ring (5) of the iron core; wherein, the end face on the base (11) on which the inner ring (12) of the iron core protrudes is defined as the first end face (112), and the base (11) provides the outer ring (5) of the iron core for assembly via the first end face (112).

5. A stator for a magnetically levitated axial bearing, characterized in that: The stator core of the magnetic levitation axial bearing as described in any one of claims 1-4.

6. The stator of the magnetic levitation axial bearing according to claim 5, characterized in that: When the first segment (1) further includes a base (11) and the inner ring (12) of the iron core protrudes from the end face (111) of the base, the outer side wall (121) of the inner ring (12) of the iron core cooperates with the end face (111) of the base to form a first groove (101), and the insulating frame (2) has a first protrusion (31); wherein, the first protrusion (31) is used to insert into the first groove (101) to prevent the insulating frame (2) from coming out along the axial direction of the stator iron core to the side away from the base (11).

7. The stator of the magnetic levitation axial bearing according to claim 6, characterized in that: The insulating frame (2) is an integrally molded structure, and the combined structure formed by the inner ring of the iron core (12) and the base (11) is also an integrally molded structure.

8. The stator of the magnetically levitated axial bearing according to any one of claims 5-7, characterized in that: It also includes a coil (3) and an insulating filler (4), the coil (3) being wound around the annular winding groove (201), and the insulating filler (4) being filled between the coil (3) and the outer ring (5) of the iron core.

9. The stator of the magnetic levitation axial bearing according to claim 8, characterized in that: When the first segment (1) further includes a base (11), and the inner ring (12) of the iron core protrudes from the end face (111) of the base, the first segment (1) is used by the second segment (6) for assembly through the base (11), and the second segment (6) is assembled onto the base (11) through the outer ring (5) of the iron core. The end face of the base (11) where the inner ring (12) of the iron core protrudes is defined as the first end face (112). When the base (11) is used by the outer ring (5) of the iron core for assembly through the first end face (112), The inner sidewall of the outer ring (5) of the iron core cooperates with the first end face (112) to form a second groove (102), and the insulating filler (4) has a second protrusion (41); wherein the second protrusion (41) is used to insert into the second groove (102) to prevent the insulating filler (4) from coming out along the axial direction of the stator iron core toward the side away from the base (11).

10. A magnetically levitated axial bearing, characterized in that: The stator core of the magnetic levitation axial bearing as described in any one of claims 1-4; or the stator of the magnetic levitation axial bearing as described in any one of claims 5-9.

11. A compressor, characterized in that: The stator core of the magnetic levitation axial bearing as described in any one of claims 1-4; or the stator of the magnetic levitation axial bearing as described in any one of claims 5-9; or the magnetic levitation axial bearing as described in claim 10.

12. A method for assembling the stator of the magnetic levitation axial bearing according to any one of claims 5-9, characterized in that, Includes the following steps: Step S1: The insulating frame (2) is fitted onto the outside of the inner ring (12) of the iron core, and the insulating frame (2) and the first block (1) cooperate to form the first component (10); Step S2: Wind wire on the first component (10) to form a coil (3) within the annular winding groove (201); Step S3: Assemble the second block (6) onto the first block (1).

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