Magnetic suspension bearing and magnetic suspension compressor

Abstract

The utility model discloses a magnetic suspension bearing and a magnetic suspension compressor, and relates to the technical field of magnetic suspension compressors, the magnetic suspension bearing comprises a magnetic conductive ring and a plurality of positioning pieces, the magnetic conductive ring comprises a base part and a step part arranged on the base part in a protruding manner, and the base part surrounds the periphery of the step part; the plurality of positioning pieces are respectively connected to the base part, the plurality of positioning pieces are distributed at intervals in the circumferential direction of the base part, and a magnetic steel mounting position is formed between every two adjacent positioning pieces and the step part; according to the technical scheme of the utility model, the integrated positioning piece is arranged in a split manner, and meanwhile, the original radial limiting function of the positioning piece on the magnetic steel is integrated into the magnetic conductive ring body structure, so that the processing difficulty of the positioning piece is reduced, the production yield and the production efficiency of the positioning piece are improved, and the transportation of the positioning piece is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of magnetic levitation compressor technology, and in particular to a magnetic levitation bearing and a magnetic levitation compressor. Background Technology

[0002] Magnetic levitation compressors mainly consist of a motor, magnetic levitation bearings, and pneumatic impellers. Among these, the magnetic levitation bearings are primarily categorized into active, passive, and hybrid types. Hybrid types, due to their smaller size and lower heat generation, are increasingly used in high-speed and ultra-high-speed applications.

[0003] Hybrid magnetic levitation bearings achieve rotor levitation control by adjusting the intensity of the bias magnetic field in the bearing air gap. The positioning and installation method of the permanent magnet is related to the stability and consistency of the magnetic bearing output. In the existing technology, the magnetic steel positioning groove is formed by fixing the positioning frame and screws on the magnetic guide ring, thereby realizing the positioning and installation of the magnetic steel of the magnetic bearing. This solution has a complex positioning frame structure, high cost, and is not convenient for packaging and transportation of multiple materials. Utility Model Content

[0004] The main purpose of this invention is to propose a magnetic levitation bearing and a magnetic levitation compressor, which aims to reduce the processing cost and difficulty of the magnetic levitation bearing positioning components.

[0005] To achieve the above objectives, the magnetic levitation bearing proposed in this utility model includes:

[0006] A magnetic ring, the magnetic ring including a base and a stepped portion connected to one side of the base, the base including a mounting surface, the mounting surface being located circumferentially outside the stepped portion;

[0007] Multiple positioning elements are respectively connected to the mounting surface, and the multiple positioning elements are distributed at intervals in the circumferential direction of the base. A magnetic mounting position is formed between two adjacent positioning elements and the step portion.

[0008] In one embodiment, the plurality of positioning elements are respectively provided with first mounting holes, and the magnetic ring is provided with second mounting holes corresponding to the first mounting holes. The first mounting holes are screwed to the second mounting holes by screws.

[0009] In one embodiment, the magnetic ring is provided with a plurality of through holes spaced apart along its circumference, and the plurality of through holes correspond one-to-one with the plurality of first mounting holes.

[0010] In one embodiment, the plurality of positioning elements are provided with a plurality of positioning notches corresponding to the plurality of through holes.

[0011] In one embodiment, the magnetic levitation bearing further includes a plurality of magnetic steel plates, which are respectively installed in a plurality of magnetic steel mounting positions.

[0012] In one embodiment, the magnet plate is arranged in a fan-shaped ring, and the inner side of the magnet plate abuts against the outer periphery of the step portion.

[0013] In one embodiment, the magnet plate is bonded to the mounting surface.

[0014] This utility model also proposes a magnetic levitation compressor, which includes a magnetic levitation bearing. The magnetic levitation bearing includes a magnetic guide ring and a plurality of positioning elements. The magnetic guide ring includes a base and a stepped portion connected to one side of the base. The base includes a mounting surface located circumferentially outside the stepped portion. The plurality of positioning elements are respectively connected to the mounting surface, and the plurality of positioning elements are spaced apart circumferentially on the base. Adjacent two positioning elements form a magnet mounting position with the stepped portion.

[0015] This utility model's technical solution adopts a separate configuration for the integrated positioning component, while integrating the original radial limiting function of the positioning component for the magnet into the main structure of the magnetic ring. This reduces the processing difficulty of the positioning component, improves the production yield and efficiency of the positioning component, and facilitates the transportation of the positioning component. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a magnetic levitation bearing embodiment;

[0018] Figure 2 for Figure 1 A schematic diagram showing the structure after removing multiple magnets and separating multiple positioning components from the magnetic ring;

[0019] Figure 3 for Figure 1 A structural schematic diagram from a sectional view;

[0020] Figure 4 for Figure 3 A schematic diagram of the structure after removing multiple magnets and positioning components;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0022] Explanation of icon numbers:

[0023] 100. Magnetic levitation bearing; 1. Magnetic guide ring; 11. Base; 111. Mounting surface; 12. Stepped part; 13. Magnet mounting position; 14. Second mounting hole; 15. Through hole; 2. Positioning component; 21. First mounting hole; 22. Positioning notch; 3. Magnet plate.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] Magnetic levitation compressors mainly consist of a motor, magnetic levitation bearings, and pneumatic impellers. Among these, the magnetic levitation bearings are primarily categorized into active, passive, and hybrid types. Hybrid types, due to their smaller size and lower heat generation, are increasingly used in high-speed and ultra-high-speed applications.

[0029] Hybrid magnetic levitation bearings achieve rotor levitation control by adjusting the bias magnetic field strength in the bearing air gap. The positioning and installation method of the permanent magnet will affect the stability and consistency of the magnetic bearing output. In the existing technology, a positioning frame is fixed to the magnetic ring with screws to form a magnetic steel positioning groove, thereby realizing the positioning and installation of the magnetic steel of the magnetic bearing. This solution has a complex positioning frame structure, high cost, and is not convenient for packaging and transportation of multiple materials.

[0030] In view of this, the present invention proposes a magnetic levitation bearing 100.

[0031] Please see Figures 1 to 3 In one embodiment of the present invention, the magnetic levitation bearing 100 includes a magnetic guide ring 1 and a plurality of positioning members 2. The magnetic guide ring 1 includes a base 11 and a stepped portion 12 connected to one side of the base 11. The base 11 includes a mounting surface 111, which is located on the circumferential outer side of the stepped portion 12. The plurality of positioning members 2 are respectively connected to the mounting surface 111, and the plurality of positioning members 2 are spaced apart on the circumferential side of the base 11. A magnet mounting position 13 is formed between two adjacent positioning members 2 and the stepped portion 12.

[0032] To address the aforementioned issues, it was discovered that the integrated design of the positioning frame was the root cause of the structural complexity. Simulation analysis of the magnetic flux path revealed that the magnetic circuit distribution of the magnetic ring 1 exhibits axial symmetry. Based on this characteristic, a design approach was proposed that uses the magnetic ring 1 itself as the positioning reference, replacing the traditional independent positioning frame design by constructing specific geometric shapes on the surface of the magnetic ring 1. After multiple rounds of structural optimization testing, it was ultimately determined that a support structure would be directly formed on the base of the magnetic ring 1, using circumferentially spaced positioning components 2 to replace the integral positioning frame.

[0033] The base 11 of the magnetic ring 1 refers to the core annular structure that carries the magnetic circuit. It can be integrally molded from a soft magnetic composite material, and its outer diameter can be adjusted according to the bearing size. The stepped portion 12 refers to a protruding structure extending axially along the base 11. Specifically, it can be formed by machining an annular boss on the inner circumference of the base 11 to define the radial inner boundary of the magnet mounting position 13. The base also includes a mounting surface 111, which is annularly arranged and located on the outer circumference of the stepped portion 12. The positioning element 2 refers to connecting components distributed circumferentially along the magnetic ring 1. Specifically, it can be a stamped metal sheet, fixed to the outer circumferential surface of the base 11 by threaded connection or welding. The spacing between adjacent positioning elements 2 is equal to the standard width of the magnet unit. The magnet mounting position 13 refers to the space enclosed by the sides of two adjacent positioning elements 2 and the outer surface of the stepped portion 12. Specifically, it can be configured as a fan-shaped annular cavity to accommodate the shape of a standard magnet.

[0034] Specifically, the stepped portion 12 of the magnetic ring 1 forms a continuous magnetic path with the base 11, avoiding abrupt changes in magnetic reluctance in traditional split structures. When the positioning members 2 are equidistantly distributed along the circumference, the gap between adjacent positioning members 2 naturally forms a lateral limiting structure for the magnet mounting slot. The outer surface of the stepped portion 12 serves as the radial support surface for the magnet mounting position 13, and its axial height determines the installation depth of the magnet unit. When the magnet is embedded in the mounting position, the stepped portion 12 bears the radial load of the magnet, and the positioning members 2 bear the circumferential load, forming a dual limiting mechanism. This integrated structure integrates the positioning function, which traditionally required separate processing, into the body of the magnetic ring 1, reducing the assembly steps of independent components.

[0035] Compared to existing technologies, traditional solutions require a positioning frame to form a ring edge for radial positioning of the magnet, while this solution directly forms the reference surface for the mounting position through the main body structure of the magnetic guide ring 1. In existing technologies, the positioning frame requires separate machining of mounting holes and the ring edge, while this solution uses circumferentially distributed discrete positioning components 2 to replace the continuous annular positioning groove, reducing machining complexity. Traditional structures require separate packaging of the positioning component 2 assembly during transportation, while in this solution, the positioning component 2 and the magnetic guide ring 1 form a stable, integrated structure, facilitating modular transportation.

[0036] This utility model's technical solution adopts a separate configuration for the integrated positioning component 2, while integrating the original radial limiting function of the positioning component 2 for the magnet into the main body structure of the magnetic ring 1. This reduces the processing difficulty of the positioning component 2, lowers the material consumption and cost of the positioning component 2, and facilitates the transportation of the positioning component 2.

[0037] In one embodiment, please refer to Figure 2 and Figure 3 Each of the multiple positioning elements 2 has a first mounting hole 21, and the magnetic ring 1 has a second mounting hole 14 corresponding to the first mounting hole 21. The first mounting hole 21 is screwed to the second mounting hole 14 by screws.

[0038] Specifically, the first mounting hole 21 refers to the through hole structure set on the positioning member 2, which can be realized by mechanical drilling or stamping forming process, and is used for screws to pass through and form a fixed connection point. This structure replaces the complex shape of the traditional positioning groove.

[0039] The second mounting hole 14 is a threaded hole on the surface of the magnetic ring 1 that corresponds to the position of the first mounting hole 21. It can be realized by CNC milling or tapping process, and is used to provide a fastening point that mates with the external thread of the screw. Its positional accuracy is directly controlled by the machining process of the magnetic ring 1.

[0040] Among them, screw connection refers to the mechanical connection method using standard fasteners. Specifically, internal hexagonal head screws with flat washers can be used. The preload of the threaded pair can ensure the rigid connection between the positioning part 2 and the magnetic ring 1.

[0041] Specifically, the positioning component 2 forms an axial alignment with the second mounting hole 14 of the magnetic ring 1 through a pre-machined first mounting hole 21. During assembly, screws pass through the first mounting hole 21 sequentially and are screwed into the threaded structure of the second mounting hole 14, forming a fixed connection through the engagement length of the threaded pair. This connection method eliminates the need to machine complex positioning groove structures on the side of the positioning component 2; only through holes need to be machined in the planar position to meet assembly requirements, thereby reducing the machining difficulty of the parts. The multiple circumferentially distributed first mounting holes 21 of the positioning component 2 and the second mounting holes 14 of the magnetic ring 1 form a one-to-one corresponding connection point array. Through multi-point fixing, circumferentially uniform positioning is achieved, ensuring the geometric accuracy of the magnet mounting position 13.

[0042] Compared with existing technologies, traditional solutions require machining a positioning groove with three-dimensional curved surface features on the positioning component 2. This structure requires a multi-axis CNC machine tool for complex surface machining. In contrast, this solution only requires drilling in a planar position, significantly simplifying the machining process. In existing technologies, the dimensional tolerance of the positioning groove must be controlled within ±0.05mm to ensure assembly accuracy. However, in this solution, the fit tolerance between the first mounting hole 21 and the second mounting hole 14 can be relaxed to ±0.1mm, reducing the accuracy requirements of the machining equipment and manufacturing costs.

[0043] Through the above technical solution, this application achieves rapid assembly and disassembly of the positioning component 2 and the magnetic ring 1, facilitating independent packaging and transportation of each component and reducing the risk of deformation caused by complex structures during transportation. The adjustable characteristics of the screw connection allow for minor positional compensation during assembly, effectively solving the jamming problem that easily occurs during traditional positioning slot assembly. The standardized screw connection method makes the positioning component 2 interchangeable, allowing damaged parts to be replaced individually during maintenance without the entire component being scrapped.

[0044] In one embodiment, please refer to Figure 2 and Figure 3 The magnetic ring 1 has a plurality of through holes 15 spaced apart along its circumference, and the plurality of through holes 15 correspond one-to-one with the plurality of first mounting holes 21.

[0045] The through holes 15 refer to the hole structure evenly distributed around the circumference of the magnetic ring 1. They can be formed by machining or stamping and are used to match the first mounting holes 21 on the positioning component 2. One-to-one correspondence means that the position of each through hole 15 has a strict geometric correspondence with the position of the first mounting hole 21 on the positioning component 2. This can be achieved through coordinate positioning or mold forming to ensure that the holes are aligned during installation.

[0046] Specifically, through holes 15 are machined at intervals along the circumference of the magnetic ring 1, with the position of each through hole 15 precisely matching the position of the first mounting hole 21 on the positioning component 2. During assembly, by aligning the first mounting hole 21 of the positioning component 2 with the through hole 15 of the magnetic ring 1 and securing them with screws, positional deviations during installation can be eliminated. The interval design of the through holes 15 ensures a uniform circumferential layout of the positioning component 2, while avoiding a decrease in structural strength of the magnetic ring 1 due to an excessive number of through holes 15 in certain areas. Through the one-to-one correspondence of hole positions, the positioning component 2 can achieve precise installation without relying on a complex positioning structure, simplifying the assembly process.

[0047] Compared to existing technologies, the positioning component 2 requires complex positioning grooves or auxiliary structures to be fixed to the magnetic ring 1, resulting in high precision requirements and low assembly efficiency. This solution eliminates the need for complex positioning groove structures by directly corresponding the through hole 15 to the first mounting hole 21, reducing reliance on machining precision. Furthermore, the standardized hole design of the magnetic ring 1 and positioning component 2 allows for uniform packaging of components, facilitating transportation and warehousing management.

[0048] Through the above technical solution, this application solves the problems of complex structure and high processing accuracy requirements of positioning component 2, realizes rapid and accurate assembly of positioning component 2 and magnetic ring 1, and simplifies the packaging and transportation process of parts through standardized hole design.

[0049] In one embodiment, please continue to refer to Figure 2 and Figure 3 Each of the multiple positioning elements 2 has a multiple positioning notch 22 corresponding to the multiple through holes 15.

[0050] It should be noted that the positioning notch 22 refers to a groove structure provided on the edge of the positioning element 2, which can be formed by milling or stamping, and its shape matches the outer contour of the through hole 15. This groove is used to form a fitting relationship with the through hole 15 of the magnetic ring 1 during installation, thereby restricting the circumferential displacement of the positioning element 2.

[0051] Among them, the through holes 15 refer to the holes spaced apart along the circumference of the magnetic ring 1, which can be formed by drilling or wire cutting. Their positions correspond one-to-one with the installation requirements of the positioning component 2. These holes are used to cooperate with the positioning notches 22 to achieve the pre-positioning of the positioning component 2 and the magnetic ring 1.

[0052] Specifically, during assembly, the positioning notch 22 of the positioning component 2 and the through hole 15 of the magnetic ring 1 achieve initial alignment through shape fit. Subsequently, screws are used to pass through the first mounting hole 21 of the positioning component 2 and the second mounting hole 14 of the magnetic ring 1 to complete the fixation. The fitting relationship between the positioning notch 22 and the through hole 15 eliminates the need for repeated adjustments to the circumferential position of the positioning component 2 in traditional solutions, thus simplifying the assembly process. Furthermore, since the positioning notch 22 directly constrains the circumferential degree of freedom of the positioning component 2 relative to the magnetic ring 1, even if there is a slight offset during screw pre-tightening, it can be automatically corrected through the geometric fit between the notch and the hole, avoiding positional deviation of the positioning component 2 after installation.

[0053] In some specific embodiments, the depth of the positioning notch 22 can be slightly larger than the radius of the through hole 15 so as to allow for a margin during fitting and to accommodate machining errors; the width of the positioning notch 22 can be consistent with the diameter of the through hole 15 to ensure stability after fitting.

[0054] Compared to existing technologies, which rely on screws to directly fix the positioning component 2 and the magnetic ring 1, requiring high-precision machining to ensure the alignment of the mounting holes of the positioning component 2 and the magnetic ring 1, and necessitating repeated adjustments to the circumferential position during installation, this solution achieves rapid positioning without the need for high-precision machining through the interlocking relationship between the positioning notch 22 and the through hole 15. This reduces the dependence on machining accuracy and also reduces assembly time and operational complexity.

[0055] Through the above technical solution, this application solves the problems of complex structure, high processing accuracy requirements and inconvenient material packaging and transportation when installing positioning component 2 and magnetic ring 1. It realizes the rapid pre-positioning of positioning component 2, simplifies the processing technology, reduces production costs, and improves the stability of components during transportation through the fitting design of positioning notch 22 and mounting hole.

[0056] In one embodiment, please refer to Figure 1 and Figure 3 The magnetic levitation bearing 100 also includes a plurality of magnetic steel plates 3, which are respectively installed in the magnetic steel mounting positions 13.

[0057] It should be noted that the magnetic steel plate 3 refers to a magnetic functional unit formed by processing permanent magnet material. Specifically, it can be achieved by cutting sintered NdFeB material into a fan-shaped ring structure. This shape matches the spatial contour of the magnetic steel mounting position 13 to achieve a tight fit. The magnetic steel mounting position 13 refers to the constraint space formed by the stepped portion 12 of the magnetic guide ring 1 and the adjacent positioning member 2. Specifically, it is achieved by arranging the positioning members 2 at intervals around the magnetic guide ring 1 to form multiple independent accommodating cavities. This structure allows each magnetic steel plate 3 to achieve bidirectional limiting in both the radial and tangential directions.

[0058] Specifically, the outer circumferential surface of the stepped portion 12 of the magnetic guide ring 1 and the inner sidewall of the positioning member 2 together constitute the boundary constraint of the magnet mounting position 13. During assembly, the inner circumferential surface of the fan-shaped magnetic steel plate 3 is directly attached to the outer surface of the stepped portion 12, and the two end faces respectively contact the sidewalls of the adjacent positioning member 2, forming a three-point positioning mode. This installation method ensures that the magnetic steel plate 3 is physically constrained in both the axial and circumferential directions, eliminating the need for additional positioning pins or snap-fit ​​structures. The geometry of the magnetic steel plate 3 and the mounting position space achieve a self-centering effect.

[0059] Compared to existing technologies, traditional solutions require machining complex positioning grooves on the positioning component 2 and secondary fixing of the magnet units with screws. This solution, however, directly forms the magnet mounting position 13 through the cooperation of the magnetic guide ring 1 and the positioning component 2, eliminating the need for machining the positioning groove. In existing technologies, the magnet units need to be adjusted one by one to ensure circumferential uniformity, while this solution achieves automatic positioning by matching the shape of the magnet plate 3 with the mounting position, reducing manual calibration steps.

[0060] Through the above technical solutions, this application simplifies the mechanical complexity of the magnet positioning structure. The shape adaptation characteristics of the magnet plate 3 and the mounting position reduce the requirements for processing accuracy. The split magnet plate 3 design allows for independent replacement of a single magnet unit when it is damaged. The circumferential uniform distribution characteristics of the mounting position ensure the uniformity of the magnetic field strength distribution and avoid local magnetic anomalies caused by positioning deviations.

[0061] In one embodiment, please refer to Figure 1 The magnetic steel plate 3 is arranged in a fan-shaped ring, and the inner side of the magnetic steel plate 3 abuts against the outer periphery of the step portion 12.

[0062] Specifically, the fan-shaped arrangement means that the shape of the magnet plate 3 is an arc-shaped structure, and its curvature matches the circumferential curvature of the magnetic ring 1. This can be achieved by stamping or precision casting processes, so that the curvature of the magnet plate 3 is consistent with the outer periphery of the step portion 12.

[0063] The inner side abutting against the outer periphery of the step portion 12 means that the radial inner surface of the magnet plate 3 and the outer surface of the step portion 12 form a surface contact. Specifically, the outer periphery diameter of the step portion 12 can be made slightly larger than the inner diameter of the magnet plate 3 by machining, and contact positioning can be achieved by interference fit or clearance fit.

[0064] Specifically, the fan-shaped arc of the magnet plate 3 allows it to continuously fit against the outer periphery of the step portion 12 when circumferentially distributed. The outer periphery of the step portion 12 serves as a radial reference surface, directly restricting the radial movement of the magnet plate 3. During assembly, the inner edge of the magnet plate 3 is physically blocked by the outer peripheral surface of the step portion 12, achieving radial positioning without relying on additional positioning components 2. The circumferential extension characteristic of the fan-shaped design creates a seamless connection between adjacent magnet plates 3, reducing fluctuations in circumferential magnetic field strength.

[0065] Compared with existing technologies, which form the magnet mounting groove by connecting the positioning component 2 and the magnetic ring 1 with screws, the existing technologies require ensuring the machining accuracy and assembly alignment of the positioning component 2 and the magnetic ring 1, resulting in a complex structure and high cost. This solution directly uses the outer peripheral surface of the stepped portion 12 as the radial positioning reference of the magnet plate 3, eliminating the complex structure of the positioning component 2, reducing assembly steps, and the self-centering property of the fan-shaped annular magnet plate 3 can reduce circumferential installation errors.

[0066] Through the above technical solution, this application solves the assembly error problem caused by the complex positioning structure during the installation of the magnetic steel plate 3, improves the uniformity of magnetic field distribution, and at the same time reduces the requirements for part processing accuracy and assembly complexity, thereby reducing manufacturing costs.

[0067] In one embodiment, please refer to Figure 1 and Figure 3 The magnetic steel plate 3 is bonded to the mounting surface 111.

[0068] Furthermore, adhesive bonding refers to the formation of a cured layer on the contact surface of the magnetic steel plate 3 using an adhesive to achieve a fixed connection. Specifically, epoxy resin or acrylic adhesive can be used to achieve this, utilizing chemical reaction or physical curing to form a stable adhesive interface.

[0069] Among them, the magnetic steel plate 3 refers to the fan-shaped permanent magnet, which can be made of neodymium iron boron material. The bonding position is located between the inner arc surface and the outer arc surface of the magnetic steel plate 3, and the bonding reliability is improved by increasing the contact area.

[0070] Specifically, the magnet plate 3 is directly fixed to the mounting surface 111 by adhesive bonding, with the adhesive evenly covering the contact area to form a continuous fixing layer. The adhesive bonding process eliminates the matching requirements of mounting holes in traditional positioning groove structures, eliminating the need for precision snap-fit ​​structures in the positioning component 2; only basic support is required to complete the circumferential positioning of the magnet plate 3. After curing, the adhesive layer forms an integral load-bearing structure, avoiding magnetic field distortion caused by localized tightening, and reducing dependence on the dimensional tolerances of the positioning component 2 during assembly.

[0071] This solution completely eliminates the mechanical connection structure between the positioning component 2 and the magnetic ring 1 by using the self-adhesive bonding method of the magnetic steel plate 3, so that the positioning component 2 only needs to have a supporting function, greatly reducing the processing steps.

[0072] In one embodiment, please refer to Figures 3 to 5 The thickness of the magnetic steel plate 3 is T, and the height of the step portion 12 relative to the base portion 11 is H, wherein T and H satisfy T > H.

[0073] It should be noted that the thickness T of the magnetic steel plate 3 refers to the dimension of the magnetic steel plate 3 in the direction perpendicular to the circumferential direction of the magnetic ring 1. Specifically, it can be achieved by stamping or cutting. Its function is to increase the thickness to cover the stepped part 12 and form an extended support for the external structure.

[0074] The height H of the step portion 12 refers to the vertical distance between the top of the step portion 12 and the surface of the base portion 11. Specifically, it can be achieved by step cutting or stacking assembly process. Its function is to limit the reference position of the magnetic steel plate 3 during installation, so that the magnetic steel plate 3 can form contact limit with the positioning part 2 after installation.

[0075] Specifically, during the installation of the magnet plate 3, since T is greater than H, when the inner side of the magnet plate 3 abuts against the step portion 12, its outer side will extend beyond the top of the step portion 12. At this time, the outer edge of the magnet plate 3 can directly contact the inner wall of the positioning member 2, or form a physical limit with the external fixing structure. This design makes the installation stability of the magnet plate 3 no longer entirely dependent on the height accuracy of the positioning member 2, but fills the gap of the magnet mounting position 13 by matching the thickness of the magnet plate 3 itself with the height of the step portion 12. As a result, the positioning member 2 only needs to provide lateral constraints, without the need to process complex limiting grooves or high-precision mating surfaces, thereby reducing the accuracy requirements of the positioning member 2 structure.

[0076] Compared with existing technologies, the existing solution requires the positioning component 2 to be machined with a positioning groove that matches the thickness of the magnet plate 3, and the groove depth must strictly correspond to the height of the step portion 12, resulting in high processing costs and low assembly error tolerance. In contrast, this solution adjusts the dimensional relationship between the magnet plate 3 and the step portion 12, making the magnet plate 3 itself the main body of the limiting structure. The positioning component 2 only needs to provide lateral fixing function, which significantly reduces the structural complexity and processing accuracy requirements.

[0077] Through the above technical solution, this application solves the installation gap problem caused by insufficient height of the step portion 12 of the magnetic steel plate 3, and simplifies the processing technology of the positioning component 2. For example, when the height H of the step portion 12 is 0.2mm, the thickness T of the magnetic steel plate 3 can be set to 0.25mm, and the 0.05mm portion exceeding the step portion 12 can directly contact the side wall of the positioning component 2, avoiding axial displacement of the magnetic steel plate 3 and ensuring the uniformity of the magnetic bearing output force.

[0078] In one embodiment, please refer to Figure 4 and Figure 5 The H satisfies 0.15mm≤H≤0.3mm.

[0079] It should be noted that the stepped portion 12 refers to the annular protrusion structure extending axially from the surface of the base 11. This can be achieved through stepped machining or a modular assembly method. Its axial height serves as a constraint boundary defining the installation position of the magnet plate 3. This height range precisely matches the thickness of the magnet plate 3 with the installation gap requirements, ensuring contact area while avoiding structural redundancy.

[0080] Specifically, the lower limit of this height range ensures an effective contact surface between the magnet plate 3 and the step portion 12, preventing circumferential displacement of the magnet within the mounting position. The upper limit of this height range controls the axial dimension of the overall structure of the magnetic ring 1, avoiding material waste due to excessive height of the step portion 12. During assembly, when the magnet plate 3 is pressed into the magnet mounting position 13, its bottom surface forms a stable contact interface with the top surface of the step portion 12, while the gap between the positioning member 2 and the step portion 12 is controlled within a reasonable range.

[0081] Compared with existing technologies, the height of the step portion 12 in existing technologies has not been optimized, often resulting in insufficient axial clearance for the magnet mounting position 13 due to excessive height, or insufficient contact area due to insufficient height. This solution optimizes the structural compactness of the magnetic ring 1 by limiting the height range, while ensuring positioning accuracy.

[0082] Through the above technical solution, this application effectively solves the problem of insufficient positioning stability of the magnet caused by the unreasonable height of the step 12 during the installation of the permanent magnet. While ensuring that the contact surface between the magnet and the step 12 meets the anti-deflection requirements, it makes the overall structure of the magnetic ring 1 more compact and reduces material consumption and processing difficulty.

[0083] This utility model also proposes a magnetic levitation compressor, which includes a magnetic levitation bearing 100. The specific structure of the magnetic levitation bearing 100 is as described in the above embodiments. Since this magnetic levitation compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0084] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A magnetic levitation bearing, characterized in that, include: A magnetic ring, the magnetic ring including a base and a stepped portion connected to one side of the base, the base including a mounting surface, the mounting surface being located circumferentially outside the stepped portion; as well as Multiple positioning elements are respectively connected to the mounting surface, and the multiple positioning elements are distributed at intervals in the circumferential direction of the base. A magnetic mounting position is formed between two adjacent positioning elements and the step portion.

2. The magnetic levitation bearing as described in claim 1, characterized in that, Each of the positioning components has a first mounting hole, and the magnetic ring has a second mounting hole corresponding to the first mounting hole. The first mounting hole is screwed to the second mounting hole by a screw.

3. The magnetic levitation bearing as described in claim 2, characterized in that, The magnetic ring has multiple through holes spaced apart along its circumference, and each of the multiple through holes corresponds to one of the multiple first mounting holes.

4. The magnetic levitation bearing as described in claim 3, characterized in that, The multiple positioning elements are provided with multiple positioning notches corresponding to the multiple through holes.

5. The magnetic levitation bearing as described in claim 1, characterized in that, The magnetic levitation bearing also includes multiple magnetic steel plates, which are respectively installed in multiple magnetic steel mounting positions.

6. The magnetic levitation bearing as described in claim 5, characterized in that, The magnetic steel plate is arranged in a fan-shaped ring, and the inner side of the magnetic steel plate abuts against the outer periphery of the step portion.

7. The magnetic levitation bearing as described in claim 6, characterized in that, The magnet plate is bonded to the mounting surface.

8. A magnetic levitation compressor, characterized in that, Including the magnetic levitation bearing as described in any one of claims 1 to 7.

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