Rotor core seat and rotor assembly, motor, compressor and air conditioner equipped therewith

Abstract

This application relates to the technical field of compressors (40) and discloses a rotor core sheet (1) and a rotor assembly (20) equipped therewith, a motor (20), a compressor (40), and an air conditioner. The rotor core sheet (1) comprises a core sheet body (11) having permanent magnet slots (12) for housing permanent magnets (121) and fastener mounting holes (13) for attaching fasteners, wherein there are multiple fastener mounting holes (13) and the sum of the cross-sectional areas of the multiple fastener mounting holes (13) is S1, and there are multiple permanent magnet slots (12) and the sum of the cross-sectional areas of the multiple permanent magnet slots (12) is S2, and 0.25 ≤ S1 / S2 ≤ 0.85.

Description

Technical Field

[0001] This application claims the priority of the Chinese patent application with the patent application number 202410496072.3 and the title "Rotor Core Seat and Rotor Assembly, Motor, Compressor and Air Conditioner Equipped with the Same" filed with the China National Intellectual Property Administration on April 24, 2024, and incorporates the full text thereof herein by reference.

[0002] This application relates to the technical field of compressors, and particularly to a rotor core seat and a rotor assembly, a motor, a compressor and an air conditioner equipped with the same.

Background Art

[0003] The motor is a core component of the compressor, and the structural design of the motor directly affects the overall performance of the compressor, including the vibration noise of the compressor, the energy efficiency of the compressor, and the reliability of the compressor. As the requirements for the quality of people's lives are increasing, the requirements for noise reduction of compressors are also increasing. The motor is the driving source of the compressor, and the improvement of optimizing multiple motors is beneficial to improving the noise reduction effect of the compressor fundamentally. To improve the user experience, the greater the rigidity of the motor, the better, and the lower the noise of the motor, the better. The motor generates electric power through the cooperation of the stator and the rotor. By strengthening the rotor strength, the noise of the motor can be effectively reduced. However, in the prior art, due to the unreasonable design of the rotor structure of the motor, it is difficult to balance the rigidity and magnetic characteristics.

Summary of the Invention

[0004] The purpose of this application is to solve at least one of the technical problems in the related art.

[0005] Therefore, one objective of this application is to propose a rotor core sheet. The rotor core sheet of this application satisfies 0.25 ≤ S1 / S2 ≤ 0.85, where S1 is the sum of the cross-sectional areas of the multiple fastener mounting holes and S2 is the sum of the cross-sectional areas of the multiple permanent magnet slots. As a result, the rotor core sheet of this application improves the rigidity of the rotor, reduces the impact on the maximum surface magnetic flux density of the rotor, ensures the magnetic properties of the rotor, and reduces compressor noise by improving the rigidity of the rotor.

[0006] This application further proposes a rotor assembly having the rotor core seat described above.

[0007] This application further proposes a motor having the above-mentioned rotor assembly.

[0008] This application further proposes a compressor having the above-mentioned motor.

[0009] This application further proposes an air conditioner having the above-mentioned compressor.

[0010] The rotor core sheet of this application comprises a core sheet body having permanent magnet slots for housing permanent magnets and fastener mounting holes for attaching fasteners, wherein the fastener mounting holes are configured in multiple ways, the sum of the cross-sectional areas of the multiple fastener mounting holes is S1, the permanent magnet slots are configured in multiple ways, the sum of the cross-sectional areas of the multiple permanent magnet slots is S2, and the value of 0.25 ≤ S1 / S2 ≤ 0.85 is satisfied.

[0011] According to the rotor core sheet of this application, a plurality of fastener mounting holes are formed in the core sheet body, and fasteners can be inserted into the fastener mounting holes. Multiple core sheet bodies are stacked to form a rotor core, and multiple fasteners are provided and fitted into the respective fastener mounting holes to fix and align the multiple core sheet bodies. Here, the sum of the cross-sectional areas of the multiple fastener mounting holes is S1, and multiple permanent magnet slots are formed in the core sheet body, with the sum of the cross-sectional areas of the multiple permanent magnet slots being S2. The core sheet body of this application satisfies 0.25 ≤ S1 / S2 ≤ 0.85, improving rotor rigidity, reducing compressor noise, ensuring the surface magnetic flux density of the rotor, and ensuring the magnetic properties of the rotor.

[0012] According to some embodiments of this application, the permanent magnet slots are provided in a plurality at intervals in the circumferential direction, and each of the permanent magnets is fitted with a permanent magnet to form a magnetic pole, the number of magnetic poles is P, and P ≥ 8.

[0013] According to some embodiments of this application, the permanent magnet slots are provided m times at intervals in the circumferential direction of the core sheet body, each of the magnetic poles is provided with k permanent magnet slots, and m = k × P, where k is a positive integer.

[0014] According to some embodiments of this application, the fastener mounting holes are provided between at least one pair of adjacent permanent magnet slots.

[0015] According to some embodiments of this application, the core sheet body is provided with through-holes that penetrate in the thickness direction, and a plurality of these through-holes are provided at intervals in the circumferential direction of the core sheet body, the sum of the areas of the plurality of these through-holes is S3, and 0.2 ≤ S1 / S3 ≤ 0.4 is satisfied.

[0016] According to some embodiments of this application, the core sheet body is provided with a rotor bore that penetrates in the thickness direction, the flow holes are provided on the outer circumference of the rotor bore, the minimum distance between the flow holes and the rotor bore is L1, the minimum width of the permanent magnet slot at the position where the permanent magnet is attached is L2, and L1 ≥ L2.

[0017] According to some embodiments of this application, the minimum distance between the fastener mounting hole and the permanent magnet slot is L3, and L3 ≥ L2.

[0018] Below, we will briefly describe rotor assemblies in other embodiments of this application.

[0019] The rotor assembly according to this application comprises: a plurality of rotor core sheets according to any one of the above embodiments, which are stacked in the thickness direction; a rotor end plate provided at at least one end of the plurality of rotor core sheets in the thickness direction; and a balance block provided on the side of the rotor end plate away from the rotor core sheets and fixedly connected to the plurality of rotor core sheets by fasteners.

[0020] The rotor assembly according to this application comprises a plurality of rotor core sheets described in any one of the above embodiments, which are stacked to form a rotor core. Therefore, the rotor assembly of this application has higher rotor core strength, lower noise generated when the rotor assembly rotates, and rotor end plates are provided at one end or both ends in the thickness direction of the rotor core to restrict the position of the stacked rotor core sheets and ensure close stacking of the core sheet bodies. Balance blocks are provided on the side of the rotor end plates away from the rotor core sheets, and rivets penetrate the balance blocks and rotor core sheets to fix the plurality of stacked rotor core sheets. By providing balance blocks, the center of gravity position during the rotation process of the rotor assembly is adjusted, ensuring the rotational stability of the rotor assembly and reducing compressor noise.

[0021] Hereinafter, motors according to other embodiments of the present application will be briefly described.

[0022] According to the motor according to the present application, it includes the rotor assembly in the above embodiment. Here, the motor is a permanent magnet motor whose housing consists of a stator and a rotor. According to the motor of the present application, since the rotor assembly in the above embodiment is provided, the strength of the rotor assembly is increased, which is advantageous for reducing the noise of the motor, and the surface magnetic flux density of the rotor assembly is high, ensuring the operating efficiency of the motor.

[0023] Hereinafter, compressors according to other embodiments of the present application will be briefly described.

[0024] According to the motor according to the present application, it includes the motor described in the above embodiment. According to the motor according to the present application, since it includes the motor described in the above embodiment, when the compressor according to the present application assembles the motor described in the above embodiment, the noise generated by the operation of the compressor is reduced, the operating efficiency of the motor is high, and it is ensured that the compressor has a high refrigeration capacity.

[0025] Hereinafter, air conditioners according to other embodiments of the present application will be briefly described.

[0026] According to the air conditioner according to the present application, it includes the compressor in the above embodiment. According to the air conditioner according to the present application, since the compressor in the above embodiment is installed, the noise generated by the compressor of the air conditioner is small, the refrigeration capacity of the compressor is high, the noise reduction performance of the air conditioner is better, and the refrigeration effect of the air conditioner is good.

[0027] Additional aspects and advantages of the invention will be partially shown in the following description, will become apparent partially from the following description, or will be understood through the practice of the present invention.

Brief Description of the Drawings

[0028] [Figure 1]It is a schematic diagram of a rotor core sheet according to an embodiment of the present application. [Figure 2] It is a schematic diagram of a rotor core sheet according to another embodiment of the present application. [Figure 3] It is a schematic diagram of a rotor core sheet according to another embodiment of the present application. [Figure 4] It is a structural schematic diagram of a rotor assembly according to an embodiment of the present application. [Figure 5] It is a schematic diagram of an axial end face of a rotor assembly according to an embodiment of the present application. [Figure 6] It is a schematic diagram of an axial end face of a motor according to an embodiment of the present application. [Figure 7] It is a structural schematic diagram of a compressor according to an embodiment of the present application. [Figure 8] It is a change diagram of rotor rigidity and the maximum surface magnetic flux density of the rotor according to an embodiment of the present application. [Figure 9] It is a change diagram of rotor rigidity and the refrigeration capacity of the compressor according to an embodiment of the present application.

Embodiments for Carrying Out the Invention

[0029] Hereinafter, embodiments of the present invention will be described in detail. The embodiments are shown in the drawings, where the same or similar reference numerals from beginning to end indicate the same or similar elements, or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary ones intended to explain the present invention and are not to be understood as limiting the present invention.

[0030] Hereinafter, with reference to the drawings, the rotor core sheet according to the embodiment of the present application will be described in detail.

[0031] The rotor core sheet 1 according to this application comprises a core sheet body 11 having permanent magnet slots 12 for housing permanent magnets 121 and fastener mounting holes 13 for attaching fasteners, wherein the fastener mounting holes 13 are configured in multiple ways, the sum of the cross-sectional areas of the multiple fastener mounting holes 13 is S1, the permanent magnet slots 12 are configured in multiple ways, the sum of the cross-sectional areas of the multiple permanent magnet slots 12 is S2, and the value of 0.25 ≤ S1 / S2 ≤ 0.85 is satisfied.

[0032] As shown in Figures 1 to 3, the core sheet body 11 has a plurality of permanent magnet slots 12 formed therein, which are spaced apart around the center of the core sheet body 11, and a plurality of permanent magnets 121 can be inserted into the permanent magnet slots 12 to form a plurality of magnetic poles, and the core sheet body 11 has a plurality of fastener mounting holes 13 formed therein, which may be used to attach fasteners, here the fasteners may be configured as rivets 16, and the fastener mounting holes 13 may be configured as rivet holes, The core sheet body 11 can be fixed by the bed 16 passing through the rivet holes, and the multiple fastener mounting holes 13 are provided at intervals in the circumferential direction of the core sheet body 11 and are located radially inward of the multiple permanent magnet slots 12, where the sum of the cross-sectional areas of the multiple fastener mounting holes 13 is S1, and the sum of the cross-sectional areas of the multiple permanent magnet slots 12 is S2, for example, the core sheet body 11 is provided with n fastener mounting holes 13, and the cross-sections of the n fastener mounting holes 13 are S11, S12, ..., S1n, respectively, and their cross-sectional area The sum of the S1 / S2 values ​​is S1 = S11 + S12 + ... + S1n, and the core sheet body 11 is provided with m permanent magnet slots 12, and the cross-sectional areas of the m permanent magnet slots 12 are S21, S22, ..., S2m, and the sum of their cross-sectional areas is S2 = S21 + S22 + ... + S2m. Then the value of S1 / S2 satisfies 0.25 ≤ S1 / S2 ≤ 0.85, and as shown in Figure 8, if 0.1 ≤ S1 / S2 ≤ 0.025, the rotor stiffness increases as the value of S1 / S2 increases, and the increase in rotor stiffness is rapid, and the maximum surface magnetic flux density of the rotor When the rotor stiffness is in a stage of decreasing and the rate of decrease is gradual, and the ratio is 0.85 ≤ S1 / S2 ≤ 1.15, the increase in rotor stiffness is gradual. When the maximum surface magnetic flux density of the rotor decreases rapidly, and the ratio is 0.25 ≤ S1 / S2 ≤ 0.85, the increase in rotor stiffness is significant and the rate of decrease in the maximum surface magnetic flux density of the rotor is gradual. As a result, the rotor core sheet 1 of this application improves rotor stiffness, reduces the impact on the maximum surface magnetic flux density of the rotor, ensures the magnetic properties of the rotor, and reduces the noise of the compressor 40 by improving rotor stiffness.

[0033] According to the rotor core sheet 1 of this application, a plurality of fastener mounting holes 13 are formed in the core sheet body 11, and fasteners can be inserted into the fastener mounting holes 13. Multiple core sheet bodies 11 are stacked to form a rotor core 203, and multiple fasteners are provided and fitted into the plurality of fastener mounting holes 13, thereby fixing and aligning the multiple core sheet bodies 11. Here, the sum of the cross-sectional areas of the plurality of fastener mounting holes 13 is S1, and multiple permanent magnet slots 12 are formed in the core sheet body 11, and the sum of the cross-sectional areas of the plurality of permanent magnet slots 12 is S2. The core sheet body 11 of this application satisfies 0.25 ≤ S1 / S2 ≤ 0.85, improving rotor rigidity, reducing rotor noise, ensuring the surface magnetic flux density of the rotor, and ensuring the magnetic properties of the rotor.

[0034] According to some embodiments of this application, a plurality of permanent magnet slots 12 are provided spaced apart in the circumferential direction, and a permanent magnet 121 is inserted into each permanent magnet slot 12 to form a magnetic pole, the number of magnetic poles is P, and P ≥ 8.

[0035] As shown in Figures 1 to 3, a plurality of permanent magnet slots 12 are provided at intervals in the circumferential direction of the core sheet body 11, and one or more permanent magnets 121 can be inserted into each of the plurality of permanent magnet slots 12 to form a plurality of magnetic poles, where the number of magnetic poles P satisfies P ≥ 8, and compared with the rotor of a motor 30 in the prior art which has 4 or 6 magnetic poles, this application increases the number of magnetic poles in the core sheet body 11, and when the rotor of the motor 30 is fitted to the stator 301, the number of magnetic poles increases, thereby improving the output density of the rotor when the circumferential dimensions of the core sheet body 11 remain constant.

[0036] According to some embodiments of this application, m permanent magnet slots 12 are provided at intervals in the circumferential direction of the core sheet body 11, k permanent magnet slots 12 are provided at each magnetic pole, and m = k × P is satisfied, where k is a positive integer.

[0037] Specifically, after inserting the permanent magnets 121 into the permanent magnet slots 12, the resulting number of magnetic poles P=8. When k=1, the number of permanent magnet slots 12 is m=8. When k=2, the number of permanent magnet slots 12 is m=16. When k is any other positive integer, the number of permanent magnet slots 12 changes accordingly. When the number of magnetic poles is constant, the number of magnetic poles is limited, and the number of permanent magnet slots 12 becomes a positive integer multiple of the number of magnetic poles. This improves the strength of the rotor and avoids deformation of the core sheet body 11 when the rotor and stator 301 rotate in conjunction.

[0038] According to some embodiments of this application, fastener mounting holes 13 are provided between at least one pair of adjacent permanent magnet slots 12.

[0039] As shown in Figures 1 to 3, the permanent magnet slots 12 are configured in a V-shape, with the first and second slots installed facing each other and tilted. The permanent magnet slots 12 are installed in pairs, and fastener mounting holes 13 are provided between at least one pair of adjacent permanent magnet slots 12. Fasteners are inserted into the fastener mounting holes 13 to fix the multiple stacked core sheet bodies 11, ensuring tightly packed core sheet bodies 11 and reducing noise generated during the rotor's rotation process.

[0040] According to some embodiments of this application, the core sheet body 11 is provided with a passage hole 14 that penetrates in the thickness direction, and a plurality of passage holes 14 are provided, spaced apart in the circumferential direction of the core sheet body 11, the sum of the areas of the plurality of passage holes 14 is S3, and satisfies 0.2 ≤ S1 / S3 ≤ 0.4.

[0041] Specifically, the core sheet body 11 is provided with a plurality of passage holes 14, and the plurality of passage holes 14 are provided along the circumferential direction around the center of the core sheet body 11. By providing a plurality of passage holes 14, the rotor and stator 301 of the motor 30 rotate in cooperation to generate current, which drives the pump body of the compressor 40 to eject oil-coated gas. The oil-coated gas flows through the passage holes 14 and enters the permanent magnet slot 12 by centrifugal force, dissipating heat from the permanent magnet 121 and preventing overheating of the permanent magnet 121. Here, the sum of the cross-sectional areas of the plurality of passage holes 14 is S3. For example, the core sheet body 11 is provided with t passage holes 14, and the areas of the t passage holes 14 are S31, S32, ..., S3t, respectively. If we define S3 = S31 + S32 + ... + S3t, then as shown in Figure 9, if 0.1 ≤ S1 / S3 ≤ 0.2, then S1 / S As the value of 3 increases, the rotor stiffness increases rapidly, and the cooling capacity of the compressor 40 decreases as S1 / S3 increases, with a relatively gradual decrease. When 0.4 ≤ S1 / S3 ≤ 0.6, as the value of S1 / S3 increases, the rotor stiffness increases gradually, but the cooling capacity of the compressor 40 decreases rapidly. When 0.2 ≤ S1 / S3 ≤ 0.4, as the value of S1 / S3 increases, the rotor stiffness increases, and the rate of decrease in the cooling capacity of the compressor 40 is gradual. Therefore, when 0.2 ≤ S1 / S3 ≤ 0.4, it is possible to ensure improved rotor stiffness, reduce noise from the compressor 40, ensure that the cooling capacity of the compressor 40 is at a high value, improve the cooling efficiency of the compressor 40, and provide multiple passage holes 14 to cool the permanent magnet 121, ensuring the safety of using the permanent magnet 121.

[0042] According to some embodiments of this application, the core sheet body 11 is provided with a rotor bore 15 that penetrates in the thickness direction, the passage holes 14 are provided on the outer circumference of the rotor bore 15, the minimum distance between the passage holes 14 and the rotor bore 15 is L1, the minimum width of the permanent magnet slot 12 at the location where the permanent magnet 121 is installed is L2, and L1 ≥ L2 is satisfied, and the minimum distance between the passage holes 14 and the peripheral wall of the rotor bore 15 is always set to be greater than or equal to the minimum width of the location where the permanent magnet 121 of the permanent magnet slot 12 is installed, thereby widening the magnetic path width of the rotor core sheet 1 body and increasing the surface magnetic flux density of the rotor.

[0043] According to some embodiments of this application, the minimum distance between the fastener mounting hole 13 and the permanent magnet slot 12 is L3, and L3 ≥ L2 is satisfied, the fastener mounting hole 13 may be configured as a rivet hole, and the fastener may be configured as a rivet 16, the multiple core sheet bodies 11 are stacked to form a rotor core 203, the rivet 16 is fitted into the rivet hole to fix the multiple core sheet bodies 11 as a single unit, and the minimum distance L3 between the rivet hole and the permanent magnet slot 12 is always greater than the minimum width of the permanent magnet slot 12 at the position where the permanent magnet 121 is mounted, which is advantageous in improving rotor rigidity and reducing noise of the compressor 40.

[0044] The rotor assembly 20 relating to this application will be briefly described below.

[0045] According to the rotor assembly 20 of this application, it comprises a plurality of rotor core sheets 1 according to any one embodiment described above, which are stacked and installed in the thickness direction; rotor end plates 201 provided at least one end of the plurality of rotor core sheets 1 in the thickness direction; and balance blocks 202 provided on the side of the rotor end plate 201 away from the rotor core sheets 1 and fixedly connected to the plurality of rotor core sheets 1 by fasteners.

[0046] The rotor assembly 20 of this application includes a plurality of rotor core sheets 1 described in any one of the above embodiments, which are stacked to form a rotor core 203. Therefore, the rotor assembly 20 of this application has higher strength in the rotor core 203, lower noise generated when the rotor assembly 20 rotates, and rotor end plates 201 are provided at one end or both ends in the thickness direction of the rotor core 203 to restrict the position of the stacked rotor core sheets 1 and ensure close stacking of the core sheet bodies 11. Balance blocks 202 are provided on the side of the rotor end plates 201 away from the rotor core sheets 1, and rivets 16 penetrate the balance blocks 202 and the rotor core sheets 1 to fix the plurality of stacked rotor core sheets 1. By providing the balance blocks 202, the center of gravity position during the rotation process of the rotor assembly 20 is adjusted, ensuring the rotational stability of the rotor assembly 20 and reducing the noise of the rotor assembly 20.

[0047] The motor 30 related to this application will be briefly described below.

[0048] According to the motor 30 of this application, the motor 30 is equipped with the rotor assembly 20 of the above embodiment, and the motor 30 here is a permanent magnet motor in which the housing consists of a stator 301 and a rotor. According to the motor 30 of this application, since the rotor assembly 20 of the above embodiment is provided, the strength of the rotor assembly 20 is increased, which is advantageous for reducing noise of the motor 30, and the surface magnetic flux density of the rotor assembly 20 is high, ensuring the operating efficiency of the motor 30.

[0049] Here, after the stator 301 and rotor are assembled, the structure is as shown in Figure 6, with the stator 301 comprising a stator core 303 and stator windings 302, and the rotor structure being the rotor assembly 20 described in the above embodiment.

[0050] The compressor 40 related to this application will be briefly described below.

[0051] According to the motor 30 of this application, since it is equipped with the motor 30 described in the above embodiment, when the motor 30 described in the above embodiment is assembled, the compressor 40 according to this application ensures that the noise generated by the operation of the compressor 40 is reduced, the operating efficiency of the motor 30 is high, and the compressor 40 has a high cooling capacity.

[0052] In some embodiments, the structure of the compressor 40 of this application is as shown in Figure 7, with a base 402 installed at the bottom of the compressor housing 401 to support and fix the compressor housing 401, and the motor 30 described in the above embodiment installed inside the compressor housing 401.

[0053] The following is a brief description of the air conditioner related to this application.

[0054] According to the air conditioner of this application, since the compressor 40 of the above embodiment is installed, the noise generated by the compressor 40 of the air conditioner is low, the cooling capacity of the compressor 40 is high, the noise reduction performance of the air conditioner is better, and the cooling effect of the air conditioner is good.

[0055] In the description of this application, directions or positional relationships indicated by terms such as "center," "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are directions or positional relationships shown based on the drawings and are solely for the purpose of facilitating and simplifying the description of this application. They do not indicate or imply that the referred devices or elements have a particular orientation, are configured in a particular orientation, or must be operated in a particular orientation, and therefore should not be understood as limiting the present invention.

[0056] Furthermore, the terms “first” and “second” are for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, features limited by “first” and “second” may explicitly or implicitly include one or more such features. In this description, “multiple” means two or more unless otherwise clearly and specifically defined.

[0057] In this application, unless otherwise specified or limited, terms such as “attachment,” “connection,” “bonding,” and “fixing” should be understood in a broad sense, for example, that a connection may be fixed, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or that there may be communication within two elements or an interaction relationship between two elements. Those skilled in the art will be able to understand the specific meaning of these terms in this application based on the specific circumstances.

[0058] In this application, unless otherwise specified or limited, the presence of a first feature "above" or "below" a second feature means that the first and second features may be in direct contact or indirectly in contact via an intermediate medium. Furthermore, the presence of a first feature "above," "above," and "upper side" of a second feature means that the first feature may be directly above or diagonally above the second feature, or simply indicates that the height of the first feature is greater than the height of the second feature. The presence of a first feature "below," "below," and "below side" a second feature means that the first feature may be directly below or diagonally below the second feature, or simply indicates that the height of the first feature is lower than the height of the second feature.

[0059] In this specification, any reference to terms such as “one embodiment,” “several embodiments,” “exemplary examples,” “examples,” “specific examples,” or “several examples” means that the specific features, structures, materials, or properties described with reference to such embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined in an appropriate manner in any one or more embodiments or examples. In addition, a person skilled in the art may combine different embodiments or examples and features in different embodiments or examples as described herein, as long as it does not create a conflict.

[0060] Although embodiments of this application have been illustrated and described, as will be understood by those skilled in the art, these embodiments are illustrative and should not be understood as limiting this application, and those skilled in the art may modify, alter, substitute, and transform these embodiments within the scope of this application.

Claims

1. A rotor core sheet comprising a core sheet body having permanent magnet slots for housing permanent magnets and fastener mounting holes for attaching fasteners, Multiple fastener mounting holes are provided, and the sum of the cross-sectional areas of the multiple fastener mounting holes is S1. The permanent magnet slots are configured in multiple ways, the sum of the cross-sectional areas of the multiple permanent magnet slots is S2, and the condition 0.25 ≤ S1 / S2 ≤ 0.85 is satisfied. Rotor core sheet.

2. Multiple permanent magnet slots are provided at intervals in the circumferential direction, and a permanent magnet is inserted into each permanent magnet slot to form a magnetic pole. The number of magnetic poles is P, and P ≥ 8 is satisfied. The rotor core sheet according to claim 1.

3. The permanent magnet slots are provided m times at intervals in the circumferential direction of the core sheet body, each magnetic pole is provided with k permanent magnet slots, and the condition m = k × P is satisfied, where k is a positive integer. The rotor core sheet according to claim 2.

4. The fastener mounting holes are provided between at least one pair of adjacent permanent magnet slots, The rotor core sheet according to claim 3.

5. The core sheet body is provided with a passage hole that penetrates in the thickness direction, and a plurality of such passage holes are provided, spaced apart in the circumferential direction of the core sheet body. The sum of the areas of the multiple passage holes is S3, and the condition 0.2 ≤ S1 / S3 ≤ 0.4 is satisfied. A rotor core sheet according to any one of claims 1 to 4.

6. The core sheet body is provided with a rotor bore that penetrates in the thickness direction, the flow holes are provided on the outer circumference of the rotor bore, and the minimum distance between the flow holes and the rotor bore is L1. The minimum width of the permanent magnet slot at the position where the permanent magnet is installed is L2, and L1 ≥ L2 is satisfied. The rotor core sheet according to claim 5.

7. The minimum distance between the fastener mounting hole and the permanent magnet slot is L3, and L3 ≥ L2 is satisfied. The rotor core sheet according to claim 5 or 6.

8. A rotor core sheet according to any one of claims 1 to 7, which is stacked in the thickness direction and installed in multiple locations, Rotor end plates provided at at least one end in the thickness direction of a plurality of rotor core sheets, The present invention is characterized by comprising a balance block provided on the side of the rotor end plate away from the rotor core sheet and fixedly connected to a plurality of rotor core sheets by fasteners, Rotor assembly.

9. The rotor assembly is characterized by comprising the rotor assembly described in claim 8. Motor.

10. A motor characterized by comprising the motor described in claim 9, Compressor.

11. A compressor as described in claim 10, Air conditioner.

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