A high-voltage motor rotor structure and motor

Abstract

This invention provides a high-voltage motor rotor structure and motor, relating to the field of magnetic levitation motors. The high-voltage motor rotor structure includes a spindle, a locking member, and a clamping bar. Magnets are provided on the side of the spindle. The locking member applies a clamping force towards the spindle to both ends of the magnets. The clamping bar is located on the side of the magnets away from the spindle and includes at least two spaced-apart fixing parts. The clamping bar is fixed to the spindle via the fixing parts, and the clamping bar between the fixing parts deforms to apply an elastic clamping force towards the spindle to the magnets. This invention fixes the magnets to the spindle using the locking member, while the clamping bar applies an additional elastic clamping force to the magnets, thereby providing additional radial clamping force to counteract the centrifugal force of the magnets when the spindle rotates. This ensures stable contact between the magnets and the spindle in high-voltage, high-power applications, enhancing the stability of the rotor during operation.

Description

Technical Field

[0001] This invention relates to the field of magnetic levitation motors, and in particular to a high-voltage motor rotor structure and motor. Background Technology

[0002] With societal progress, in response to the call for energy conservation and emission reduction and to lower electricity costs, traditional mechanical bearing motors in the industrial sector are gradually being replaced by magnetic levitation motors.

[0003] Although magnetic levitation motors have the advantages of small size and low noise, in high-voltage and high-power applications, in order to shorten the rotor axial length and increase the rotor critical speed, the magnets of high-voltage and high-power motors are designed to be thicker, and it is difficult to effectively constrain the radial direction of the magnets, resulting in poor stability. Summary of the Invention

[0004] To overcome the problems existing in related technologies, the present invention provides a high-voltage motor rotor structure and motor, which can improve the stability of magnet fixing.

[0005] To achieve the above and other related objectives, a first aspect of the present invention provides a high-voltage motor rotor structure, comprising:

[0006] A mandrel, wherein a magnet is provided on the side of the mandrel;

[0007] A locking element applies a clamping force to both ends of the magnet, pointing towards the spindle; and,

[0008] A clamping bar is disposed on the side of the magnet away from the mandrel. The clamping bar includes at least two spaced-apart fixing parts. The clamping bar is fixed to the mandrel by the fixing parts. The clamping bar located between the fixing parts deforms to apply an elastic clamping force to the magnet pointing towards the mandrel.

[0009] In one embodiment of the present invention, in a non-stressed state, the clamping strip located between the two fixing parts is in a preset arc shape, and the preset arc shape protrudes toward the mandrel.

[0010] In one embodiment of the present invention, a receiving groove is formed on the surface of the magnet to accommodate the pressing strip. After the pressing strip is fixed by the fixing part, the preset arc-shaped portion is straightened.

[0011] In one embodiment of the present invention, the locking member is configured as a locking screw, and a pressure plate is provided between the locking screw and the magnet. A through groove is provided on the pressure plate, and the fixing part is located in the through groove. The pressure plate presses and fixes the fixing part to the magnet through the through groove.

[0012] In one embodiment of the present invention, the passage groove is provided with an anti-slip structure.

[0013] In one embodiment of the present invention, a plurality of magnet groups are provided on the side of the mandrel, arranged circumferentially along the mandrel. Each magnet group includes a plurality of magnets distributed axially along the mandrel. The two ends of the magnets are stepped. In the same magnet group, two adjacent magnets are spliced ​​together to form a groove for accommodating the locking member, the fixing part and the pressure plate. The shape of the fixing part is adapted to the groove.

[0014] In one embodiment of the present invention, a protective sleeve is provided on the outer side of the magnet, and the magnet abuts against the protective sleeve.

[0015] In one embodiment of the present invention, a reinforcing layer is provided in the groove, the reinforcing layer being located between the locking member and the protective sleeve, and respectively abutting against the locking member and the protective sleeve.

[0016] In one embodiment of the present invention, the mandrel has heat dissipation holes along the axial direction, and impellers of different sizes are respectively installed at both ends of the mandrel.

[0017] A second aspect of the present invention provides an electric motor comprising the high-voltage motor rotor structure as described in the first aspect.

[0018] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0019] This invention uses a locking component to fix the magnet to the mandrel, while a clamping bar applies an additional elastic clamping force to the magnet, thereby providing an additional radial clamping force to counteract the centrifugal force of the magnet when the mandrel rotates. This ensures that the magnet can stably fit with the mandrel in high-pressure and high-power applications, enhancing the stability of the rotor during operation.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] Figure 1 This is a cross-sectional view of a high-voltage motor rotor structure shown in an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 Sectional view along the middle AA direction;

[0024] Figure 3 yes Figure 1 A magnified view of part B in the middle section;

[0025] Figure 4 This is a schematic diagram of the magnet located at the end of the rotor structure of a high-voltage motor shown in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the magnets other than those at the ends in the high-voltage motor rotor structure shown in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the clamping strip shown in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the clamping strip in an unfixed state as shown in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the clamping strip in a fixed state as shown in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the pressure block shown in an embodiment of the present invention;

[0031] Figure 10 This is an assembly diagram of the clamping strip being repeatedly bent, as shown in an embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the assembly of the clamping strip shown in an embodiment of the present invention.

[0033] Figure label:

[0034] 1. Spindle; 2. Magnet; 3. Locking element; 4. Pressure bar; 5. Receiving groove; 6. Pressure plate; 7. Through groove; 8. Anti-slip structure; 9. Reinforcing layer; 10. Heat dissipation hole; 11. Impeller; 12. First through hole; 13. Second through hole; 14. Sheath; 15. Fastening screw; 16. Third through hole; 17. Fixing part; 18. Transition section; 19. Magnetic bearing assembly; 20. Sensor assembly; 21. Main body; 22. Wing plate; 23. First shaft section; 24. Second shaft section; 25. Groove; 26. Magnetic shielding block. Detailed Implementation

[0035] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention.

[0036] Magnetic levitation motors are currently widely used. Although they have the advantages of small size and low noise, in high-voltage and high-power applications, in order to shorten the axial length of the rotor and increase the critical speed of the rotor, the magnets of the motor are thickened. At this time, due to the increased weight of the magnets, the centrifugal force increases accordingly during rotation, and it is difficult to effectively constrain the radial direction of the magnets, which can easily lead to instability during rotation.

[0037] Based on this, the present invention provides a high-voltage motor rotor structure. While fixing the magnet to the spindle with a locking member, the prestress of the clamping strip is used to press the magnet tightly, providing additional elastic clamping force. This provides additional radial clamping force to counteract the centrifugal force of the magnet when the shaft rotates, ensuring that the magnet can stably fit with the spindle in high-voltage and high-power applications, thus enhancing the stability of the rotor during operation. It should be noted that the high-voltage and high-power applications referred to in the present invention refer to MW (megawatt) level motors, with operating voltages above kilovolts.

[0038] Please see Figure 1 , Figure 7 and Figure 8 An exemplary embodiment of the present invention provides an electric motor, which includes a high-voltage motor rotor structure. The high-voltage motor rotor structure includes a spindle 1, a locking member 3, and a clamping bar 4. The spindle 1 has magnets 2 on its side, primarily neodymium iron boron permanent magnets, which have high magnetic energy product and coercivity, providing a strong magnetic field that allows the rotor to operate stably without mechanical contact. Furthermore, neodymium iron boron magnets have high energy density, thus allowing for a smaller volume while maintaining the same magnetic force. This makes the internal structure of the motor more compact and improves operating efficiency. Exemplarily, along the axial direction of the spindle 1, the spindle 1 includes a first shaft segment 23 and a second shaft segment 24 connected sequentially from the middle to both ends. The diameter of the second shaft segment 24 is smaller than the diameter of the first shaft segment 23. The magnets 2 are disposed on the outer circumferential surface of the first shaft segment 23. On the second shaft segment 24, along the direction from the middle to both ends of the spindle 1, a magnetic bearing assembly 19 and a sensor assembly 20 are sequentially disposed. The sensor assembly 20 is used to detect the position information of the spindle 1 within the motor. The locking member 3 applies a clamping force pointing towards the spindle 1 to both ends of the magnet 2. The locking member 3 fixes the magnet 2 to the spindle 1 by means of bonding, snap-fitting, threaded connection, etc. A clamping strip 4 is provided on the side of the magnet 2 away from the spindle 1. The clamping strip 4 includes at least two spaced fixing parts 17. The clamping strip 4 is fixed to the spindle 1 by the fixing parts 17. The clamping strip 4 located between the fixing parts 17 can deform to apply an elastic clamping force pointing towards the spindle 1 to the magnet 2. That is, in the unforced state (unfixed state), the clamping strip 4 has a first shape (such as...). Figure 7 As shown), when the clamping strip 4 is fixed to the spindle 1 by the fixing part 17 (fixed state), the clamping strip 4 can deform to have a second shape (as shown). Figure 8 As shown), the elastic force generated by the deformation of the second-shaped clamping bar 4 is applied to the magnet 2 to further press the magnet 2 onto the mandrel 1.

[0039] In the high-voltage motor rotor structure provided in this embodiment, while the magnet 2 is fixed to the spindle 1 by the locking member 3, the prestress of the clamping strip 4 is used to press the magnet 2, providing additional elastic clamping force, thereby providing additional radial clamping force to counteract the centrifugal force of the magnet 2 when the shaft rotates, ensuring that the magnet 2 can stably fit with the spindle 1 in high-voltage and high-power application scenarios, and enhancing the stability of the rotor during operation.

[0040] The magnet 2 has a radial inner surface, a radial outer surface, and a side surface connecting the radial inner surface and the radial outer surface. The radial inner surface is set as an arc-shaped surface that fits against the outer circumferential surface of the first shaft segment 23 of the mandrel 1. In this embodiment, the shape of the radial outer surface is not limited. For example, it can be set as an arc so that the radial outer surfaces of several magnets 2 are located on the same cylindrical surface, or the radial outer surface can also be set as a plane.

[0041] It should be noted that there are no restrictions on the number and arrangement of magnets 2, or the matching quantity relationship between locking parts 3 and magnets 2. For example, if several magnets 2 are spaced apart, each magnet 2 corresponds to two locking parts 3, meaning each magnet 2 needs to be locked and fixed by two separate locking parts 3. The two locking parts 3 corresponding to a single magnet 2 lock and fix both ends of the magnet 2 respectively. For another example, the sides of two adjacent magnets 2 can be set together, and the abutting ends of the two adjacent magnets 2 can share one locking part 3, which simultaneously fixes the abutting ends of the two adjacent magnets 2. For yet another example, two adjacent magnets 2 can be partially overlapped, that is, the radial inner surface of one magnet 2 abuts the radial outer surface of another magnet 2. In this case, the overlapping part of the two magnets 2 can share one locking part 3, which simultaneously fixes the overlapping ends of the two adjacent magnets 2.

[0042] In one embodiment, such as Figure 7 and Figure 8 As shown, two fixing parts 17 are provided, located at both ends of the magnet 2. The clamping strip 4 is laid across the side of the magnet 2 away from the mandrel 1. The shape of the clamping strip 4 is not limited, but it must ensure that after the clamping strip 4 is fixed, it undergoes elastic deformation due to mutual compression with the magnet 2, thus applying an elastic clamping force to the magnet 2. Multiple magnets 2 arranged adjacent to each other in the axial direction of the mandrel 1 can be clamped and fixed by one clamping strip 4, or two or more clamping strips 4 can be provided to enhance the stability of the magnet 2 fixation.

[0043] For example, please refer to Figure 10The clamping strip 4 can be bent or repeatedly bent, so that the end of the clamping strip 4 and the bending point are exposed outwards through the edge of the magnet 2. At this time, the end of the clamping strip 4 and the bending point are set as fixing parts 17. The clamping strip 4 between every two fixing parts 17 applies an elastic clamping force to the magnet 2, further enhancing the stability of the fixation between the magnet 2 and the mandrel 1. For example, in... Figure 10 In the embodiment shown, the clamping strip 4 is Z-shaped, with the two ends and two bends of the Z-shape protruding outwards through the edge of the magnet 2, that is, the two ends and two bends of the Z-shape respectively constitute four fixing parts 17.

[0044] In one exemplary embodiment, please refer to Figure 6 and Figure 7 The clamping strip 4 located between the two fixing parts 17 has a preset arc shape, which protrudes towards the spindle 1. When the clamping strip 4 is fixed, the most protruding part of the clamping strip 4 will first contact the magnet 2, and after it is completely fixed, it will undergo elastic deformation due to relative compression with the magnet 2, thereby applying an elastic clamping force to the magnet 2.

[0045] In this embodiment, in addition to fixing the two ends of the magnet 2 with the locking member 3, the middle position of the magnet 2 is also fixed with the clamping strip 4, thereby achieving full fixation of the two ends and the middle position of the magnet 2, which can provide additional radial pressure to counteract the centrifugal force of the magnet 2 under high-speed rotation.

[0046] In one exemplary embodiment, please refer to Figure 7 The clamping strip 4 has a circular cross-section, and the magnet 2 has a receiving groove 5 on its surface to accommodate the clamping strip 4. The receiving groove 5 has an arc shape that matches the clamping strip 4. After the clamping strip 4 is fixed by the fixing part 17, the pre-arc portion is straightened. After the clamping strip 4 is straightened, it is located in the receiving groove 5. The receiving groove 5 serves to position the clamping strip 4 and prevents the clamping strip 4 from protruding from the surface of the magnet 2, thus keeping the surface of the magnet 2 flat.

[0047] For example, the width of the receiving groove 5 gradually decreases from the radial outer side to the radial inner side of the magnet 2. The larger opening width of the receiving groove 5 facilitates the guidance of the pressing strip 4 into the receiving groove 5. The gradually decreasing bottom width of the receiving groove 5 can effectively position the pressing strip 4.

[0048] In one exemplary embodiment, please refer to Figure 3 and Figure 9The locking component 3 includes a locking screw, which comprises a connected head and a threaded portion. The threaded portion is threadedly connected to the spindle 1. A pressure plate 6 is provided between the locking screw and the magnet 2. The head of the locking screw applies a clamping force to the pressure plate 6. A through groove 7 is formed recessed on the surface of the pressure plate 6 near the spindle 1. The fixing part 17 of the clamping strip 4 is located in the through groove 7, and the fixing part 17 of the clamping strip 4 protrudes from the surface of the pressure plate 6. After the locking screw is tightened, the pressure plate 6 and the magnet 2 jointly apply a clamping force to the fixing part 17 of the clamping strip 4, fixing the fixing part 17. The pressure plate 6 presses and fixes the fixing part 17 onto the magnet 2 through the through groove 7.

[0049] This design, by creating a threaded hole on the spindle 1 to mate with the locking screw, completes the assembly of the locking component 3. The clamping force applied by the locking component 3 to the pressure plate 6 not only fixes the magnet 2 to the spindle 1 but also clamps the fixing part 17, achieving stable fixation of the clamping strip 4 and providing another layer of protection for the stable fixation of the magnet 2. The shape of the pressure plate 6 is not specifically limited, but a first through hole 12 needs to be created on the pressure plate 6 for the screw portion of the locking component 3 to pass through.

[0050] In one embodiment, please refer to Figure 4 and Figure 5 The magnet 2 includes a connected main body 21 and a wing plate 22, with the wing plate 22 disposed at both ends of the main body 21 along the axial direction of the spindle 1. If the sides of two adjacent magnets 2 along the axial direction of the mandrel 1 abut against each other, half of the through holes need to be opened on the wing plates 22 of the two magnets 2. When the sides of the two adjacent magnets 2 abut against each other, the two half of the through holes are joined together to form a complete second through hole 13 for the screw portion of the locking screw to pass through. At this time, the pressure plate 6 applies pressure to the wing plates 22 of the two magnets 2 respectively. On the two magnets 2 located at both ends of the axial direction of the mandrel 1, a complete second through hole 13 is opened on the wing plate 22 at the end that does not contact the adjacent magnets 2, so that the screw portion of the locking screw can pass through, thereby achieving stable fixation of the magnets 2. If the two adjacent magnets 2 along the axial direction of the mandrel 1 are spaced apart, and the screw portion of the locking screw passes through the middle of the two magnets 2, at this time the two sides of the pressure plate 6 press against the wing plates 22 of the two adjacent magnets 2 respectively and apply pressure to the two magnets 2 respectively.

[0051] By setting the pressure plate 6, on the one hand, the contact area between the locking part 3 and the magnet 2 can be increased, thereby enhancing the stability of the magnet 2. On the other hand, when two adjacent magnets 2 are spaced apart, the pressure plate 6 can reduce the use of the locking part 3 and facilitate disassembly and assembly.

[0052] Of course, it is understandable that in other embodiments, the locking element 3 may also be a rivet or other structure that can achieve a fastening effect.

[0053] It should be noted that both the pressure plate 6 and the locking component 3 are made of non-magnetic materials, such as copper, aluminum, and stainless steel, which effectively reduces the magnetic potential loss in the air gap and ensures the electromagnetic performance of the motor.

[0054] In one exemplary embodiment, please refer to Figure 9 The groove 7 is equipped with an anti-slip structure 8. The anti-slip structure 8 can increase the friction between the pressure block and the pressure strip 4, prevent the pressure strip 4 from slipping along its axial direction after it is fixed, ensure that the pressure strip 4 can maintain its flattened posture, and make the pressure strip 4 continuously and stably apply elastic pressure to the magnet 2.

[0055] In one embodiment, the anti-slip structure 8 is configured as a plurality of raised strips protruding from the pressure block, the length direction of the raised strips being set at an angle to the length direction of the through groove 7, and the plurality of raised strips being arranged at intervals along the length direction of the through groove 7.

[0056] In another embodiment, the anti-slip structure 8 is configured as an anti-slip coating, which may be, but is not limited to, an epoxy anti-slip coating or a rubber coating.

[0057] In one exemplary embodiment, please refer to Figures 1 to 11 Multiple magnet groups arranged circumferentially along the side of the spindle 1 are provided. Magnetic isolation blocks 26 are positioned between the two ends of each magnet group and the spindle 1. These blocks maintain and strengthen the magnetic field, preventing leakage from both ends of the rotor, thus ensuring the motor's efficiency is not affected and reducing interference with surrounding electronic equipment. Figure 11 As shown, each magnet assembly includes multiple magnets 2 distributed axially along the spindle 1. The thickness of the main body 21 of the magnet 2 is greater than the thickness of the wing plate 22, so that the two ends of the magnet 2 are stepped. In the same magnet assembly, two adjacent magnets 2 are spliced ​​to form a groove 25 for accommodating the locking member 3, the fixing part 17, and the pressure plate 6. The shape of the fixing part 17 is adapted to the groove 25. Figure 6 and Figure 7 As shown, a transition section 18 is provided between the fixing part 17 of the clamping strip 4 and the preset arc-shaped part. The transition section 18 is set to a straight state that can fit with the magnet 2, thereby preventing the parts of the clamping strip 4 located at both ends of the magnet 2 from lifting after fixing, so that the surface of the magnet 2 is flat.

[0058] In one embodiment, please refer to Figure 6 The clamping strips 4 corresponding to the several magnets 2 of a magnet group can be spliced ​​in pairs. After the clamping strips 4 are spliced, they form an overall arc-shaped strip structure. The adjacent pre-set arc-shaped parts are bent to form a fixing part 17, so that when installing the clamping strips 4, the clamping strips 4 corresponding to the several magnets 2 of a magnet group can be uniformly positioned and installed conveniently.

[0059] In one embodiment, the shape of the pressure plate 6 is adapted to fit the groove 25 so that the pressure plate 6 fills the bottom of the groove 25 after being fixed, and the pressure plate 6 is restricted by the magnet 2 to prevent it from shaking, thereby further enhancing stability.

[0060] In one exemplary embodiment, please refer to Figure 2 The outer side of the magnet 2 is covered by a sheath 14, and the magnet 2 abuts against the sheath 14. The material of the sheath 14 is, for example, carbon fiber, which gives the sheath 14 the characteristics of high strength, low weight and low eddy current loss. Alternatively, high-strength materials such as glass fiber and basalt fiber can be used. The sheath 14 can further restrict the radial position of the magnet 2 and further improve the stability of the magnet 2 during rotation.

[0061] In one exemplary embodiment, please refer to Figure 3 A reinforcing layer 9 is provided within the groove 25. The reinforcing layer 9 is located between the locking member 3 and the protective sleeve 14, and abuts against both the locking member 3 and the protective sleeve 14. The reinforcing layer 9 can restrict the radial position of the locking member 3 on the mandrel 1, preventing the locking member 3 from loosening and affecting the stability of the magnet 2. The reinforcing layer 9 is made of high-modulus carbon fiber, which is wound from the inside to the outside along the radial direction of the mandrel 1, until the high-modulus carbon fiber is flush with the surface of the magnet 2, thereby using the high strength of the high-modulus carbon fiber to stably fix the locking member 3.

[0062] During assembly, all magnets 2 of a magnet group are first installed uniformly. Specifically, all magnets 2 in a magnet group are arranged along the axial direction of the mandrel 1 on the outer circumferential surface of the first shaft section 23, with the wing plates 22 of adjacent magnets 2 abutting each other. Then, magnetic isolation blocks 26 are placed between the two ends of the magnet group and the mandrel 1. After that, the clamping strip 4 is placed on the radial outer surface of the magnet 2, and the fixing part 17 is located in the groove 25 formed between two magnets 2, or on the wing plate 22 of the end magnet 2. On the surface, the preset arc-shaped part of the pressing strip 4 is aligned with the receiving groove 5 opened on the magnet 2. Then, the pressure plate 6 is placed in the groove 25 or on the wing plates 22 located at both ends of the magnet assembly, so that the fixing part 17 enters the through groove 7 opened on the pressure plate 6. Then, the pressure plate 6 and the mandrel 1 are locked by the locking member 3 to achieve fixation. During the locking and fixing process, the preset arc-shaped part of the pressing strip 4 will be compressed and deformed into a straight state and stored in the receiving groove 5, so that the surface of the magnet 2 is flat.

[0063] After one magnet assembly is installed, other magnet assemblies are installed along the circumference of the mandrel 1 using the above method until the side of the mandrel 1 is fully covered. After the magnets 2 are fully covered, several grooves 25 located at the same axial position of the mandrel 1 are aligned. Then, high-modulus carbon fiber is wrapped from the inside to the outside along the radial direction of the mandrel 1 in the aligned grooves 25 or on the surface of the locking member 3 at the end of the magnet assembly until it is flush with the radial outer surface of the magnet 2, forming a reinforcing layer 9. Finally, the sheath 14 is put on the outside of the magnet 2 to complete the assembly.

[0064] In one exemplary embodiment, please refer to Figure 1 The spindle 1 has a heat dissipation hole 10 along the axial direction. Impellers 11 of different sizes are installed at both ends of the spindle 1. The impellers 11 are fixed to the spindle 1 by fastening screws 15. A third through hole 16 is also provided in the fastening screw 15 along the axial direction. The third through hole 16 is connected to the heat dissipation hole 10.

[0065] With this design, when the spindle 1 rotates, the impellers 11 with different sizes at both ends will generate a pressure difference at both ends of the spindle 1, thereby forming an airflow in the heat dissipation hole 10 to achieve efficient heat dissipation. At the same time, the airflow in the heat dissipation hole 10 can be changed by adjusting the diameter of the third through hole 16 on the fastening screw 15, which is convenient for flexible design according to the actual heat generation of the rotor.

[0066] For example, the impeller 11 and the spindle 1 can also be fixed by interference fit, welding, adhesive bonding, etc., but all of these methods are required to ensure that the heat dissipation hole 10 is connected to the outside to ensure the heat dissipation effect.

[0067] The present invention fixes the magnet 2 to the spindle 1 by locking member 3, and at the same time, the clamping bar 4 applies additional elastic clamping force to the magnet 2, thereby providing additional radial clamping force to counteract the centrifugal force of the magnet 2 when the shaft rotates, ensuring that the magnet 2 can be stably attached to the spindle 1 in high-pressure and high-power application scenarios, and enhancing the stability of the rotor during operation.

[0068] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying 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.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0071] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein.

[0072] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A high-voltage motor rotor structure, characterized in that, include: A mandrel (1) is provided with a magnet (2) on its side; The locking element (3) applies a clamping force to both ends of the magnet (2) pointing towards the spindle (1); and, A clamping strip (4) is provided on the side of the magnet (2) away from the spindle (1). The clamping strip (4) includes at least two spaced fixing parts (17). The clamping strip (4) is fixed to the spindle (1) by the fixing parts (17). The clamping strip (4) located between the fixing parts (17) deforms to apply an elastic clamping force to the magnet (2) pointing towards the spindle (1). In a non-stressed state, the clamping strip (4) located between the two fixing parts (17) is in a preset arc shape, and the preset arc shape protrudes towards the spindle (1); the surface of the magnet (2) is provided with a receiving groove (5) for accommodating the clamping strip (4), and after the clamping strip (4) is fixed by the fixing part (17), the preset arc shape is straightened.

2. The high-voltage motor rotor structure according to claim 1, characterized in that, The locking component (3) is configured as a locking screw, and a pressure plate (6) is provided between the locking screw and the magnet (2). A through groove (7) is provided on the pressure plate (6), and the fixing part (17) is located in the through groove (7). The pressure plate (6) presses and fixes the fixing part (17) onto the magnet (2) through the through groove (7).

3. The high-voltage motor rotor structure according to claim 2, characterized in that, The passage groove (7) is provided with an anti-slip structure (8).

4. The high-voltage motor rotor structure according to claim 2, characterized in that, The mandrel (1) has a plurality of magnet groups arranged circumferentially along the side of the mandrel (1). Each magnet group includes a plurality of magnets (2) distributed axially along the mandrel (1). The two ends of the magnets (2) are stepped. In the same magnet group, two adjacent magnets (2) are spliced ​​together to form a groove for accommodating the locking member (3), the fixing part (17) and the pressure plate (6). The shape of the fixing part (17) is adapted to the groove.

5. The high-voltage motor rotor structure according to claim 4, characterized in that, The magnet (2) is covered with a protective sleeve (14) on its outer side, and the magnet (2) abuts against the protective sleeve (14).

6. The high-voltage motor rotor structure according to claim 5, characterized in that, A reinforcing layer (9) is provided in the groove. The reinforcing layer (9) is located between the locking member (3) and the protective sleeve (14) and abuts against the locking member (3) and the protective sleeve (14) respectively.

7. The high-voltage motor rotor structure according to any one of claims 1-6, characterized in that, The mandrel (1) has heat dissipation holes (10) along the axial direction, and impellers (11) of different sizes are respectively installed at both ends of the mandrel (1).

8. An electric motor, characterized in that, The motor includes the high-voltage motor rotor structure as described in any one of claims 1 to 7.

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