Rotor structure, motor, compressor and refrigeration equipment

Abstract

The utility model discloses a rotor structure, a motor, a compressor and refrigeration equipment, and relates to the technical field of motors, the rotor structure comprises a rotor core and magnetic steel; the rotor core is formed by stacking a plurality of rotor punching sheets, each rotor punching sheet comprises an inner ring part and a plurality of fan-shaped parts which are circumferentially distributed around the inner ring part, and a magnetic steel groove is formed between every two adjacent fan-shaped parts and the inner ring part; the magnetic steel is arranged in the magnetic steel groove; wherein the side walls of at least part of the magnetic steel grooves are provided with elastic sheet groups, each elastic sheet group comprises at least two parallel elastic sheets, and the tops of the elastic sheets extend into the magnetic steel grooves and abut against the side walls of the magnetic steel so as to fix the magnetic steel. According to the technical scheme of the utility model, the at least two elastic sheets of the elastic sheet group abut against the magnetic steel in the magnetic steel groove, thereby guaranteeing the stability of the magnetic steel in the magnetic steel groove and reducing the comprehensive cost of the motor or the compressor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a rotor structure, a motor, a compressor and a refrigeration device. Background Art

[0002] At present, the magnetic steel fixing methods of the permanent magnet motor rotor are divided into surface mounting and insertion. Because the centrifugal force of the inner rotor motor is relatively large, the magnetic steel is usually installed by insertion. In the related technology, for the magnetic steel insertion rotor, the usual fixing methods are gluing, axial reinforcement or integral injection molding, etc. However, the above fixing methods have certain requirements for the use environment. When the rotor is in the environment of refrigerant and lubricant for a long time, the magnetic steel fixed by the above fixing method is easy to loosen or even fall out of the rotor core, causing the motor or compressor to fail, affecting the stability of the use of the motor or compressor and increasing the overall cost. Utility Model Content

[0003] The main purpose of the utility model is to provide a rotor structure, which uses at least two springs of a spring group to press the magnet in the magnet slot, thereby ensuring the stability of the magnet in the magnet slot and reducing the overall cost of the motor or compressor.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a rotor structure, which comprises:

[0005] A rotor core, wherein the rotor core is formed by stacking a plurality of rotor punchings, wherein the rotor punchings include an inner ring portion and a plurality of sector portions circumferentially distributed around the inner ring portion, and a magnetic steel slot is formed between two adjacent sector portions and the inner ring portion; and

[0006] A magnetic steel is installed in the magnetic steel slot;

[0007] Among them, at least part of the side walls of the magnetic steel slots are provided with spring sheet groups, each of which includes at least two parallel spring sheets, the top of the spring sheet extends into the magnetic steel slot and abuts against the side wall of the magnetic steel to fix the magnetic steel.

[0008] Optionally, at least part of the fan-shaped portion has a side wall facing the magnetic steel slot provided with a notch groove, the notch groove is provided with the spring sheet group, and the spring sheets of the spring sheet group extend from the bottom of the notch groove to the slot opening.

[0009] Optionally, at least part of the spring sheet group is arranged on the outer periphery of the inner ring portion, and the spring sheets of the spring sheet group extend along the radial direction of the rotor punching.

[0010] Optionally, the spring piece is narrow in the middle and wide at both ends.

[0011] Optionally, the bottom width of the spring sheet is defined as E, the middle width of the spring sheet is defined as C, and the top width of the spring sheet is defined as D, and C, D and E satisfy: C<D<E.

[0012] Optionally, the maximum width of the spring piece is defined as F, the length of the spring piece is defined as H, and F and H satisfy: H / 2≤F≤H.

[0013] Optionally, the end of the spring sheet extending into the magnetic steel groove is provided with an arc with a central angle of 10° to 20°, and the arc is used to abut the magnetic steel.

[0014] Optionally, the lengths of the two spring pieces of the same spring piece group are defined as H1 and H2, respectively, and H1 and H2 satisfy: H1<H2.

[0015] Optionally, the radial length of the magnetic steel slot is defined as J, the circumferential width of the magnetic steel slot is defined as W, the length of the spring sheet is defined as H, and the distance from the root of the spring sheet to the side wall of the magnetic steel slot is defined as M, and the H, J and W satisfy: H = (J / W) × A × k, wherein 1 < k < 1.1, A = HM

[0016] Optionally, the thickness of the rotor punching sheet is defined as T, and T and A satisfy: T / 5≤A≤T / 2.

[0017] Optionally, the number of rotor poles of the rotor structure is defined as p, and the moving distance of the spring piece in the axial direction of the rotor core is between A×tan(360° / p / 2) and A×tan(360° / p).

[0018] Optionally, the groove side wall of the magnetic steel groove is also recessed with an avoidance groove, and the avoidance groove on one of the rotor punching sheets corresponds to the spring sheet on the axially adjacent rotor punching sheet. In the installation direction of the magnetic steel, multiple avoidance grooves are located on the same side of the axially adjacent spring sheets along the rotor core.

[0019] Optionally, the number of rotor poles of the rotor structure is defined as p, and the radial angle between the adjacent avoidance grooves and the spring sheets on the same rotor punching sheet along the rotor punching sheet satisfies: 360° / p or 360° / (p / 2).

[0020] Optionally, the number of the spring sheet groups is defined as 2K or 4K, the number of rotor poles of the rotor structure is defined as p, and K and p satisfy: 1≤K≤p / 2.

[0021] Optionally, the magnetic steel grooves provided with the spring sheet groups are evenly distributed along the circumference of the rotor punching, and a plurality of the spring sheet groups are distributed along the same circumference or radial side of the same rotor punching.

[0022] Optionally, the number of magnetic steel slots provided with the spring sheets is defined as m, and the m and p satisfy: m≤(pm).

[0023] Optionally, end plates are provided at both ends of the rotor core, and the end plates are provided with a plurality of magnetic isolation holes. The plurality of magnetic isolation holes are axially opposite to the plurality of magnetic steel slots. The circumferential width of the magnetic isolation holes is defined as W2, and the thickness of the rotor punching sheet is defined as T. T, W and W2 satisfy: W≥(W2+2×T).

[0024] Optionally, the end plate is provided with a magnetic isolation bridge in the radial middle of the magnetic isolation hole, the magnetic isolation bridge extends circumferentially and is connected to the opposite sides of the magnetic isolation hole, the radial width of the magnetic isolation bridge is defined as W3, and T and W3 satisfy: T≤W3≤2×T.

[0025] Optionally, the end plate is made of magnetic material, and the magnetic permeability of the end plate is greater than 1200.

[0026] Optionally, the rotor punching includes a plurality of first rotor punchings and second rotor punchings arranged at both axial ends of the first rotor punchings, the outer periphery of the second rotor punchings is continuously arranged, and the magnetic steel slots of the first rotor punchings are arranged through the outer periphery.

[0027] The utility model also provides a motor, which comprises a stator and the rotor structure as described above.

[0028] The utility model also provides a compressor, which comprises the motor as described above.

[0029] The utility model also provides a refrigeration device, which comprises the compressor as mentioned above.

[0030] The technical solution of the utility model is to set a spring sheet group on the side wall of the magnetic steel groove, each spring sheet group includes at least two parallel spring sheets, and the magnetic steel is adapted to be installed in the magnetic steel groove, that is, the size of the magnetic steel is consistent with the size of the magnetic steel groove. In the process of installing the magnetic steel, the two parallel spring sheets can press the magnetic steel in the magnetic steel groove, and the two spring sheets can press the magnetic steel at the same time, and can present different pressing forces or the same pressing forces, so as to ensure the stability of the magnetic steel. Moreover, compared with the existing gluing or injection molding methods, this solution presses the magnetic steel with a structure of at least two spring sheets, thereby reducing the material used to fix the magnetic steel. At the same time, on the basis of good stability of the magnetic steel, the maintenance frequency is reduced, thereby reducing the overall cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 It is an exploded schematic diagram of an embodiment of the rotor structure and magnetic steel of the utility model;

[0033] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the rotor structure of the utility model;

[0034] Figure 3 for Figure 1 Schematic diagram of the structure of the middle rotor punching plate;

[0035] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0036] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0037] Figure 6 for Figure 1 Schematic diagram of explosion of two adjacent rotor punchings;

[0038] Figure 7 for Figure 1 Schematic diagram of the structure of the middle end board;

[0039] Figure 8 This is a schematic structural diagram of another embodiment of the rotor punching of the utility model;

[0040] Fig. 9 This is a structural schematic diagram of another embodiment of the rotor punching of the utility model;

[0041] Fig.10 It is a structural schematic diagram of an embodiment of the second rotor punching of the utility model.

[0042] Description of Figure Numbers:

[0043] Label name Label name 100 Rotor punching 110 Magnetic steel slot 111 Notch 112 shrapnel 113 Avoidance slot 120 Avoidance hole 130 Bridge 140 Inner ring 150 Sector 200 End Plate 210 Magnetic isolation hole 220 Magnetic isolation bridge 230 rivet hole 300 rivet 400 magnetic steel

[0044] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0048] The utility model provides a rotor structure.

[0049] In the embodiment of the present utility model, please refer to Figure 1 , Figures 3 to 5 , the rotor structure comprises:

[0050] The rotor core is formed by stacking a plurality of rotor punching sheets 100, wherein the rotor punching sheet 100 comprises an inner ring portion 140 and a plurality of sector portions 150 circumferentially distributed around the inner ring portion 140, and a magnetic steel slot 110 is formed between two adjacent sector portions 150 and the inner ring portion 140;

[0051] The magnetic steel 400 is installed in the magnetic steel slot 110;

[0052] Among them, at least part of the side walls of the magnetic steel slots 110 are provided with spring plates, each of which includes at least two parallel spring plates 112. The top of the spring plates 112 extends into the magnetic steel slots 110 and abuts against the side walls of the magnetic steel 400 to fix the magnetic steel 400.

[0053] The technical solution of the present invention is to set a spring sheet group on the groove side wall of the magnetic steel groove 110, each spring sheet group includes at least two parallel spring sheets 112, and the magnetic steel 400 is adapted to be installed in the magnetic steel groove 110, that is, the size of the magnetic steel 400 is consistent with the size of the magnetic steel groove 110. During the installation of the magnetic steel 400, the two parallel spring sheets 112 can both press the magnetic steel 400 in the magnetic steel groove 110, and the two spring sheets 112 can press the magnetic steel at the same time, and can present different pressing forces or the same pressing forces, so as to ensure the stability of the magnetic steel 400. Compared with the existing gluing or injection molding methods, the present solution presses the magnetic steel 400 with a structure of at least two spring sheets 112, thereby reducing the material used to fix the magnetic steel 400. At the same time, on the basis of good stability of the magnetic steel 400, the maintenance frequency is reduced, thereby reducing the overall cost.

[0054] The sector 150 is spaced apart from the outer peripheral wall of the inner ring 140 and can be connected to the outer wall of the inner ring 140 through a connecting bridge. The inner ring 140 is sleeved on the rotating shaft to ensure the magnetic flux strength between the magnetic steel 400 and the stator and improve the anti-demagnetization ability of the magnetic steel 400 close to the inner ring 140. In this embodiment, a plurality of sector 150 are alternately connected to the inner ring 140 in the circumferential direction, and the sector 150 connected to the inner ring 140 and the sector 150 not connected to the inner ring 140 are independently connected to adjacent rotor punchings 100, or, in another embodiment, a plurality of sector 150 are connected to the inner ring 140, and the rotor punching 100 is integrally formed. In addition, the sector 150 on different rotor punchings 100 can be stacked and formed by buckling, or can be stacked into a rotor core by gluing or welding. In this way, when the fan-shaped portion 150 is connected to the inner ring portion 140 through the connecting bridge, the spring sheet 112 is arranged on the outer wall of the inner ring portion 140 and has a portion that radially extends into the radially opposite magnetic steel slot 110 along the rotor punching 100 to press against the magnetic steel 400, thereby ensuring the elastic deformation space of the spring sheet 112 and further ensuring the stability of the magnetic steel 400 in the magnetic steel slot 110.

[0055] It should be noted that the shape of the magnetic steel slot 110 can extend along the radial direction of the rotor punching 100, or can extend obliquely relative to the radial direction of the rotor punching 100, or can extend circumferentially in the shape of an arc in the rotor punching 100; preferably, a spring sheet group is provided on one of the two opposite sides of the magnetic steel slot 110, and no spring sheet group is provided on the other side, so as to achieve the coordination of tightening and supporting, and ensure the stability of the magnetic steel 400 in the magnetic steel slot 110. Specifically, a spring sheet group can include two spring sheets 112 extending in parallel, or can include three or four or more spring sheets 112 extending in parallel.

[0056] In one embodiment, please refer to Figure 3and Figure 4 , at least part of the fan-shaped portion 150 is provided with a notch groove 111 on the side wall facing the magnetic steel groove 110, and a spring sheet group is provided in the notch groove 111, and the spring sheet 112 of the spring sheet group extends from the groove bottom of the notch groove 111 to the notch opening. It can be understood that the extension direction of the spring sheet 112 is shown as extending toward the notch opening of the notch groove 111, and the root of the spring sheet 112 can be connected to the groove bottom wall of the notch groove 111, and can also be connected to the groove side wall of the notch groove 111. In this embodiment, the root of the spring sheet 112 is connected to the groove bottom wall of the notch groove 111, and extends from the notch portion of the notch groove 111 to the magnetic steel groove 110 to press against the magnetic steel 400. In this way, the notch groove 111 provides a deformation space for the spring sheet 112, so that the spring sheet 112 can release sufficient elastic force to ensure the stability of the magnetic steel 400 in the magnetic steel groove 110. It should be noted that the notch groove 111 can be formed by a recessed formation from the side groove wall of the magnetic steel groove 110, or can be a through hole formed in the rotor punching 100, and then part of the side wall of the through hole is connected to the magnetic steel groove 110, so as to form a notch groove 111 for installing the spring piece 112 on the groove side wall of the magnetic steel groove 110. Of course, in other embodiments, the spring piece group can also be directly set on the groove side wall of the magnetic steel groove 110.

[0057] In one embodiment, please refer to Figure 3 and Figure 4 , at least part of the spring sheet group is arranged on the outer periphery of the inner ring part 140, and the spring sheets 112 of the spring sheet group extend radially along the rotor punching 100. Referring to the above structure, part of the spring sheet group can be arranged on the outer periphery of the inner ring part, and have a part extending into the magnetic steel slot 110 radially opposite to the rotor punching 100, so as to press the magnetic steel 400 in the radial direction of the rotor punching 100. Therefore, in coordination with the spring sheet group arranged in the notch groove 111, the two spring sheet groups press the magnetic steel 400 in the magnetic steel slot 110 in staggered directions, thereby ensuring the stability of the magnetic steel 400 in the magnetic steel slot. It should be noted that, if Figure 3 As shown, the inner diameter of the fixing ring is larger, so that the rotor punching 100 is configured as a rotor punching 100 with a large inner diameter, or, as shown in FIG. Figure 8 As shown, the inner diameter of the fixing ring is small, so that the rotor punching 100 is configured as a small inner diameter rotor punching 100. According to the diameter change of the rotating shaft, the same rotor core can include a small inner diameter rotor punching 100 or a large inner diameter rotor punching 100.

[0058] In this embodiment, the two spring leaf groups respectively press against the magnetic steel 400 in the radial and circumferential directions to ensure the stability of the magnetic steel 400 in the radial and circumferential directions, thereby improving the stability of the magnetic steel 400 in the magnetic steel slot 110. Each spring leaf group can be provided with two spring leaves 112 of different lengths to further ensure the stability of the magnetic steel 400 under various operating environments. It should be noted that the length of the spring leaves 112 of each spring leaf group remains consistent. Of course, in other embodiments, only one spring leaf group can be provided in the magnetic steel slot 110, and the spring leaves 112 of the spring leaf group extend along the circumferential or radial direction of the rotor punching 100.

[0059] In one embodiment, please refer to Figures 3 to 6 , the spring piece 112 is narrow in the middle and wide at both ends. It can be understood that the main deformation position of the spring piece 112 is the middle, and the connection or abutment is the end thereof. In this way, the width of the middle is narrow, which ensures the deformation ability of the spring piece 112, and the width of the two ends is large, which ensures the tightening effect of the spring piece 112 on the magnetic steel 400 and the stability of the spring piece 112 in the magnetic steel slot 110. Of course, in other embodiments, the width of the spring piece 112 is equal in the extension direction of the spring piece 112, or the width of the spring piece 112 gradually decreases.

[0060] Specifically, in this embodiment, please continue to refer to Figures 3 to 6 , the bottom width of the spring sheet 112 is defined as E, the middle width of the spring sheet 112 is defined as C, and the top width of the spring sheet 112 is defined as D, and C, D and E satisfy: C<D<E. It can be understood that the bottom of the spring sheet 112 is the maximum width position of the spring sheet 112, which can improve the stability of the spring sheet 112 connected to the notch groove 111 and ensure the stable contact of the spring sheet 112 to the magnetic steel 400. The middle of the spring sheet 112 is set to the minimum width position, which improves the deformation ability of the spring sheet 112 when the two ends are used as the force, and can prevent the spring sheet 112 from losing its elasticity due to excessive elastic deformation. When the top of the spring sheet 112 abuts against the magnetic steel 400, the spring sheet 112 is stably deformed and releases a large elastic force to fully press the magnetic steel 400 against the magnetic steel groove 110.

[0061] Further, in this embodiment, please refer to Figures 3 to 6, the maximum width of the spring sheet 112 is defined as F, and F and H satisfy: H / 2≤F≤H. It can be understood that in the present embodiment, the maximum width F of the spring sheet 112 is equal to the bottom width E of the spring sheet 112, that is, H / 2≤F≤H is equivalent to H / 2≤E≤H. In this way, the width of the spring sheet 112 is limited to between half the length of the spring sheet 112 and the length of the spring sheet 112, so that the spring sheet 112 can fully exert its elastic deformation ability, avoiding bending due to a small width of the spring sheet 112, or avoiding elastic deformation due to a large width of the spring sheet 112, thereby enhancing the elastic force of the spring sheet 112 against the magnetic steel 400, ensuring the stability of the magnetic steel 400 in the magnetic steel slot 110, ensuring the output power of the motor or compressor and reducing maintenance costs. Of course, in other embodiments, the maximum width of the spring sheet 112 may be limited to the middle of the spring sheet 112 , or the relationship between the maximum width F of the spring sheet 112 and the length H of the spring sheet 112 may satisfy: H / 3≤F<H / 2.

[0062] In one embodiment, please refer to Figure 4 and Figure 5 , the end of the spring sheet 112 extending into the magnetic steel slot 110 is provided with an arc with a central angle of 10° to 20°, and the arc is used to abut the magnetic steel 400. It can be understood that in the process of installing the magnetic steel 400, the arc-shaped end can prevent the spring sheet 112 from scratching the magnetic steel 400, and ensure the magnetic flux between the rotor and the stator. Moreover, it is inevitable that in the process of installing the magnetic steel 400, the end of the spring sheet 112 is prone to deformation. The arc-shaped end ensures the abutment area between the spring sheet 112 and the magnetic steel 400, making the installation of the magnetic steel 400 more flexible and convenient, and effectively balancing the abutment force of the spring sheet 112 on the magnetic steel 400. The center angle of the arc is limited to between 10° and 20°, which ensures the stability of the spring 112 against the magnetic steel 400 and prevents the spring 112 from interfering with the installation of the magnetic steel 400. If the center angle of the arc is less than 10° or greater than 20°, it is easy to scratch the magnetic steel 400 and easily cause a large deformation, thereby reducing the reliability of the magnetic steel 400 to maintain stability in the magnetic steel slot 110. In this embodiment, the center angle of the arc can be 10°, 15°, 18° or 20°. Of course, in other embodiments, the end of the spring 112 can also be set to a polygon, or, when set to an arc shape, the center of the arc can be between 20° and 30°.

[0063] In one embodiment, please refer to Figures 3 to 6, define the lengths of the two spring pieces 112 of the same spring piece group as H1 and H2 respectively, and H1 and H2 satisfy: H1<H2. It can be understood that in the process of installing the magnetic steel 400 in the magnetic steel slot 110, the longer spring piece 112 in the same spring piece group first abuts against the magnetic steel 400, and the shorter spring piece 112 abuts against the magnetic steel 400. After the magnetic steel 400 is installed in the magnetic steel slot 110, the two spring pieces 112 of the same spring piece group extend into the magnetic steel slot 110 with the same length. At this time, the elasticity of the two spring pieces 112 is not the same. The longer spring piece 112 has a greater degree of elastic deformation and exerts a greater pressing force on the magnetic steel 400. In this way, the two spring pieces 112 of different lengths can ensure full contact between the magnetic steel 400 and the magnetic steel slot 110 under various conditions, thereby providing sufficient fixing strength for the magnetic steel 400 and ensuring the stable operation of the motor or compressor. For details, please refer to Figures 3 to 6 , when the magnetic steel 400 is not installed in the magnetic steel slot 110, the length of the spring piece 112 extending into the magnetic steel slot 110 is 0.05mm to 0.2mm. It should be noted that H is the minimum value of H1 and H2. Of course, in other embodiments, the same magnetic steel slot 110 can be provided with multiple spring pieces groups, and the spring pieces 112 of different spring pieces groups have different lengths, so as to achieve the same magnetic steel 400 with spring pieces 112 of different lengths being pressed tightly, thereby ensuring the reliability of the magnetic steel 400 maintaining stability in the magnetic steel slot 110.

[0064] In one embodiment, please refer to Figure 4 and Figure 5, the radial length of the magnetic steel slot 110 is defined as J, the circumferential width of the magnetic steel slot 110 is defined as W, the length of the spring sheet 112 is defined as H, and the distance from the root of the spring sheet 112 to the side wall of the magnetic steel slot 110 is defined as M. H, J and W satisfy: H = (J / W) × A × k, where 1 < k < 1.1, A = HM. It should be noted that M represents: the length of the portion of the spring sheet 112 that does not extend into the magnetic steel slot 110 after the rotor punching 100 is formed and before the magnetic steel 400 is installed in the magnetic steel slot 110; H represents: the extended length of the spring sheet 112 after the rotor punching 100 is formed and before the magnetic steel 400 is installed in the magnetic steel slot 110. The relationship between the length of the spring piece 112 and the length of the spring piece 112 extending into the magnetic steel slot 110 and the size of the magnetic steel slot 110 satisfies: H = (J / W) × A × k, and A represents the difference between the length of the spring piece 112 and the depth of the notch 111, that is, the length of the spring piece 112 extending into the magnetic steel slot 110 before the magnetic steel 400 is not installed in the magnetic steel slot 110. In this way, it can be converted into: H / A = J / W × k. It can be understood that the elastic deformation ability of the spring piece 112 is adapted to the size of the magnetic steel 400, and the relationship between the two is adjusted by using the adjustment parameter k to correct the error and adapt the material of the magnetic steel 400 and the spring piece 112, so that the elastic deformation ability of the spring piece 112 and the size parameter of the magnetic steel 400 are in a reasonable relationship, thereby ensuring the installation convenience of the magnetic steel 400 and the stability of the magnetic steel 400 in the magnetic steel slot 110.

[0065] In one embodiment, please refer to Figures 2 to 5 , define the thickness of the rotor punching 100 as T, T and A satisfy: T / 5≤A≤T / 2. It can be understood that A here represents: when the magnetic steel 400 is not installed in the magnetic steel slot 110, the length of the spring sheet 112 extending into the magnetic steel slot 110, that is, the difference between the length H of the spring sheet 112 and the extension M of the notch slot 111. In this way, when the spring sheet 112 is not deformed, the length of the spring sheet 112 extending into the magnetic steel slot 110 is limited to between half of the thickness of the corresponding rotor punching 100 and the thickness of the rotor punching 100. While ensuring the deformation space of the spring sheet 112, the spring sheet 112 also has sufficient elastic force to press the magnetic steel 400 against the magnetic steel slot 110, and then However, when the length of the spring sheet 112 is too long, so that the length of the spring sheet 112 extending into the magnetic steel slot 110 is greater than the thickness of the rotor punching 100, the elastic deformation ability of the spring sheet 112 is relatively weakened, and due to excessive occupation of the space of the magnetic steel slot 110, the degree of deformation is too large and it is easy to bend or over-deform, thereby making it difficult to press against the magnetic steel 400; similarly, when the length of the spring sheet 112 is too short, so that the length of the spring sheet 112 extending into the magnetic steel slot 110 is less than half of the rotor punching 100, the length of the spring sheet 112 deformed by force is shorter, resulting in insufficient deformation of the spring sheet 112, thereby making it difficult to press against the magnetic steel slot 110.

[0066] In one embodiment, please refer to Figure 2, the number of rotor poles of the rotor structure is defined as p, and the moving distance of the spring piece 112 in the axial direction of the rotor core is between A×tan(360° / p / 2) and A×tan(360° / p). Referring to the case where the magnetic steel 400 is not installed, with the insertion length A as the base number, through the function adjustment of the number of pole pairs, it is concluded that after the magnetic steel 400 is installed in the magnetic steel slot 110, the axial movement distance of the spring piece 112 along the rotor core under the push of the magnetic steel 400 satisfies: A×tan(360° / p / 2) to A×tan(360° / p), which limits the axial movement length of the spring piece 112 in the rotor core, that is, the protrusion height of the spring piece 112 in the axial direction of the rotor core in the formed state of the rotor core, to ensure that the elastic force of the spring piece 112 after deformation can stably press against the magnetic steel 400, and similarly, to avoid excessive deformation of the spring piece 112 and loss of elastic recovery ability, making it difficult to press against the magnetic steel 400 in the magnetic steel slot 110. Generally, the number of rotor poles varies from 6, 8, to 10, and it can be recognized that the rotor extends out by a length of 2A in the axial direction of the rotor core, to avoid excessive deformation of the spring piece 112 and making it difficult to press against the magnetic steel 400.

[0067] In one embodiment, please refer to Figure 6 , the slot side wall of the magnetic steel slot 110 is also concavely provided with an avoidance slot 113, and the avoidance slot 113 on one rotor punching 100 corresponds to the spring sheet 112 on the rotor punching 100 adjacent in the axial direction, and in the installation direction of the magnetic steel 400, a plurality of avoidance slots 113 are located on the same side of the spring sheets 112 adjacent in the axial direction of the rotor core. It should be noted that a plurality of avoidance slots 113 are located on the same side of the spring sheets 112 adjacent in the axial direction of the rotor core, which is expressed as follows: with reference to a certain magnetic steel slot 110, the magnetic steel slot 110 is arranged through in the axial direction of the rotor core, and along a certain axial direction thereof, there is at least one adjacent avoidance slot 113 in front of each spring sheet 112, and the area of ​​the avoidance slot 113 is larger than the spring sheet 112, and the magnetic steel 400 is installed in the magnetic steel slot 110 along this direction. In this way, during the installation of the magnetic steel 400, the avoidance groove 113 provides a deformation space for the spring sheet 112, so that the spring sheet 112 can be deformed smoothly, thereby ensuring the elastic force of the spring sheet 112 on the magnetic steel 400 and reducing the difficulty of installing the magnetic steel 400. Of course, in the axial direction of the rotor punching 100, the two rotor punchings 100 adjacent to the spring sheet 112 are both axially opposite to the spring sheet 112. While ensuring the smooth deformation of the spring sheet 112, the magnetic steel 400 can be installed in the magnetic steel groove 110 at any end of the magnetic steel 400, thereby improving the convenience of installing the magnetic steel 400.

[0068] It can be understood that the above structure of the rotor core is realized by stacking the rotor punchings 100 by rotating the rotor punchings 100 at a specific angle during the stacking process of the rotor punchings 100. The stacking angle requires that the spring sheet 112 of the rotated rotor punchings 100 is opposite to the avoidance groove 113 of the adjacent rotor punchings 100 in the axial direction of the rotor core. Of course, in other embodiments, the thickness of the spring sheet 112 can be controlled to be smaller than the thickness of the rotor punchings 100, so that the elasticity has a certain deformation space, so that it can be elastically pressed against the magnetic steel 400. In addition, the number of magnetic steel slots 110 provided with the avoidance groove 113 can be an odd number or an even number. Preferably, the number of magnetic steel slots 110 provided with the avoidance groove 113 is an even number and is evenly distributed in the circumferential direction of the rotor punchings 100 to balance the structure of the rotor punchings 100 so that the center of gravity is as centered as possible. Similarly, multiple avoidance grooves 113 can be provided in the same magnetic steel slot 110 to fully press against the magnetic steel 400.

[0069] Among them, the magnet 400 in the same magnet slot 110 is composed of two sections, and the two sections of the magnet 400 are installed facing each other respectively, and in the installation direction of any magnet 400, the avoidance groove 113 of the front rotor punching 100 is always axially opposite to the spring piece 112 of the adjacent rear rotor punching 100. In addition, the corner of the magnet 400 is configured as an arc surface. During the process of inserting the magnet 400 into the magnet slot 110, the corner of the arc surface can guide the deformation direction of the spring piece 112, thereby reducing the difficulty of inserting the magnet 400 and allowing the spring piece 112 to smoothly undergo elastic deformation to fully press the magnet 400 in the magnet slot 110.

[0070] It should be noted that if Figure 1 and Figure 6 As shown, multiple rotor punchings 100 can be directly axially stacked to form a rotor core. In this case, all magnetic steel slots 110 are provided with notched slots 111. Alternatively, the rotor punchings 100 can also be stacked on another rotor punching 100 after being rotated at a certain angle. The rotation angle can be applicable to any rotor punching 100. In this case, some magnetic steel slots 110 are provided with notched slots 111. Moreover, multiple rotor punchings 100 form a cyclic stacking body after being rotated and stacked. The cyclic stacking body is cyclically repeated in the axial direction of the rotor core. Here, the rotor core can be composed of an integer number of cyclic stacking bodies or a non-integer number of cyclic stacking bodies. In addition, the rotation angle of the rotor punchings 100 during the stacking process can change regularly or remain unchanged, or, while ensuring that the magnetic steel slots 110 on different rotor punchings 100 are relative in the axial direction of the rotating core, the rotation angles of different rotor punchings 100 during the stacking process can also be different or change randomly.

[0071] In one embodiment, please continue to refer to Figure 6 and Fig. 9, the number of rotor poles of the rotor structure is defined as p, and the radial angles of adjacent avoidance grooves 113 and spring sheet groups on the same rotor punching sheet 100 along the rotor punching sheet 100 satisfy: 360° / p or 360° / (p / 2). It should be noted that p is not only the number of rotor poles of the rotor structure, but also equal to the number of magnetic steel slots 110 in the rotor punching 100. In this way, 360° / p can be expressed as the angle between two adjacent magnetic steel slots 110 with the center of the rotor punching 100 as the center, and 360° / (p / 2) is expressed as the angle between two magnetic steel slots 110 separated by one magnetic steel slot 110 with the center of the rotor punching 100 as the center. In addition, on the same circumference of the rotor punching 100, the magnetic steel slot 110 with the avoidance slot 113 is located in front of the magnetic steel slot 110 with the spring plate 112. When the two are adjacent to each other, the rotation angle of the multiple rotor punchings 100 in the stacking is 360° / p. When the two are separated by one magnetic steel slot 110, the rotation angle of the multiple rotor punchings 100 in the stacking is 360° / (p / 2). Of course, the same rotor punching sheet 100 can be provided with two magnetic steel slots 110 with avoidance slots 113, and the two magnetic steel slots 110 are sequentially located on the circumferential front side of the adjacent magnetic steel slots 110 with spring sheets 112, so that the rotor punching sheet 100 can be rotated 360° / p or 360° / (p / 2) and stacked, which improves the operational convenience of rotor core forming, and ensures that the avoidance slots 113 can increase the deformation space for the spring sheets 112, so that the magnetic steel 400 can be stabilized in the magnetic steel slots 110 under the elastic pressing action of the spring sheets 112. Of course, when two or more magnetic steel slots 110 are sandwiched between the magnetic steel slots 110 with avoidance slots 113 and the magnetic steel slots 110 with spring sheets 112, the rotation angle of the rotor punching sheet 100 during the rotation and stacking process can be n×(360° / p), where n is an integer greater than 3.

[0072] In one embodiment, please refer to Figure 3 , Figures 8 to 10, define the number of spring groups as 2K or 4K, define the number of rotor poles of the rotor structure as p, K and p satisfy: 1≤K≤p / 2. It can be understood that the number of spring sheet groups is an even number. Preferably, the spring sheet groups are evenly distributed along the circumference of the rotor punching 100 to improve the structural stability of the rotor punching 100. At the same time, the number of spring sheet groups is limited to within twice the number of rotor poles, that is, from the perspective of maximizing the number of spring sheet groups, in most cases, one of any pair of side walls of a magnetic steel slot 110 is provided with a spring sheet group. For example, if the number of side walls of the magnetic steel slot 110 is 4, then two side walls of two pairs of opposite side walls are provided with spring sheet groups, and then all magnetic steel slots 110 are provided with spring sheet groups to ensure that each rotor punching 100 can fix all magnetic steels 400 and ensure the stability of the magnetic steel 400 in the magnetic steel slot 110. From the perspective of minimizing the number of spring sheet groups, in the minimum case, two magnetic steel slots 110 are provided with a spring sheet group, and then the rotor punchings 100 are stacked by rotating the angle of 360° / p so that the magnetic steels 400 are all pressed tightly by the spring sheets 112. In this way, when the number of the spring sheet groups is maximized or minimized, the number of the spring sheet groups is evenly distributed circumferentially, and the structural stability of the rotor punching 100 is ensured, and the installation stability of the magnetic steel 400 in the corresponding magnetic steel slot 110 is also ensured.

[0073] Further, in this embodiment, please refer to Figures 8 to 10 , the magnetic steel slots 110 provided with the spring sheet groups are evenly distributed along the circumference of the rotor sheet 100, and the multiple spring sheet groups are distributed along the same circumference or radial side of the same rotor sheet 100. Referring to the above definition, the multiple spring sheet groups are evenly distributed along the circumference of the rotor sheet 100 so that the center of gravity of the rotor sheet 100 can be maintained at the center of the circle, thereby ensuring the structural stability of the rotor sheet 100. In particular, in a certain circumference of the rotor sheet 100, the spring sheet group is arranged on the side groove wall of the circumference of the corresponding magnetic steel slot 110, or is arranged close to the center or edge of the rotor sheet 100, so that the structural balance and stability of the rotor sheet 100 are guaranteed, and in the installation process of the rotor sheet 100 by rotating and stacking, the avoidance grooves 113 and the spring sheet groups of two adjacent rotor sheets 100 can be axially opposite, or, for the magnetic steel slots 110 in the same axial direction, the spacing of the inserted spring sheets 112 is kept uniform, thereby effectively ensuring the structural balance of the rotor core and the output power of the rotor. Of course, in other embodiments, the setting positions of the spring leaf groups of different magnetic steel slots 110 can also be set on different circumferential sides or radial sides to ensure that the elastic supporting force exerted on the magnetic steel 400 is consistent when the rotor rotates forward or reverse, which is convenient for controlling the motor or compressor.

[0074] Specifically, in this embodiment, please continue to refer to Figures 8 to 10, define the number of magnetic steel slots 110 with spring sheets 112 as m, m and p satisfy: m≤(pm). It should be noted that in the present embodiment, the rotor punchings 100 are stacked into the rotor core by rotating, so that some of the magnetic steel slots 110 can be provided with spring sheets 112. For the formed rotor core, the magnetic steel 400 in each magnetic steel slot 110 will be pressed tightly by the spring sheets 112. At this time, the number of magnetic steel slots 110 with spring sheets 112 is limited to be less than or equal to the number of magnetic steel slots 110 without spring sheets 112. In the process of rotating the rotor punchings 100 to stack, the rotor punchings 100 are realized. The spring pieces 112 of the rotor punching 100 are staggered with the spring pieces 112 on the adjacent rotor punching 100, so as to avoid mutual interference of deformation of the spring pieces 112 on different rotor punchings 100, and ensure the elastic pressing effect of the spring pieces 112 on the magnetic steel 400. Furthermore, the spring pieces 112 on the rotor punching 100 can be axially opposite to the avoidance grooves 113 of the adjacent rotor punching 100, so as to provide deformation space for the deformation of the spring pieces 112, thereby improving the elastic release ability of the spring pieces 112 and ensuring the stability of the magnetic steel 400 in the magnetic steel slots 110. Of course, in other embodiments, the number of magnetic steel slots 110 provided with spring pieces 112 can also account for half to all of the number of magnetic steel slots 110 of the rotor punching 100, and at the same time, it is limited that the spring pieces 112 of different rotor punchings 100 have a certain gap in the axial direction of the rotor core, that is, the thickness of the spring pieces 112 is less than the thickness of the rotor punching 100, so as to ensure the elastic pressing effect of the spring pieces 112 on the magnetic steel 400.

[0075] In one embodiment, please refer to Figure 1 and Figure 7, end plates 200 are provided at both ends of the rotor core, and the end plates 200 are provided with a plurality of magnetic isolation holes 210, and the plurality of magnetic isolation holes 210 are opposite to the plurality of magnetic steel slots 110 in the axial direction, and the circumferential width of the magnetic isolation holes 210 is defined as W2, and the thickness of the rotor punching 100 is defined as T, and T, W and W2 satisfy: W≥(W2+2×T). It can be understood that the end plates 200 are clamped at both axial ends of the rotor core to ensure the integrity of the plurality of rotor cores, and the magnetic isolation holes 210 limit the width of the magnetic isolation holes 210 to be smaller than the width of the magnetic steel slots 110 while ensuring that the magnetic steel 400 can form a magnetic flux through the magnetic isolation holes 210, thereby ensuring the stability of the magnetic steel 400 in the magnetic steel slots 110, and here, the widths of the magnetic steel slots 110 and the magnetic isolation holes 210 are both referenced to the circumferential direction of the rotor core, and the lengths of the magnetic steel slots 110 and the magnetic isolation holes 210 are both referenced to the radial direction of the rotor core. In particular, W≥(W2+2×T) is defined, which can ensure the stability of the magnetic steel 400 in the magnetic steel slot 110 in the axial direction of the rotor core, and also ensure that the magnetic steel 400 can form a magnetic flux through the magnetic isolation hole 210, thereby ensuring the output power of the motor or compressor. Specifically, a rivet hole 230 is provided on the end plate 200, and an avoidance hole 120 is provided on the rotor punching 100. The avoidance hole 120 and the rivet hole 230 are opposite to each other in the axial direction of the rotor core, and then, the rivet 300 is penetrated through the avoidance hole 120 and riveted on the rivet hole 230, thereby ensuring the axial stability of the rotor core. Of course, the rotor punchings 100 and the rotor punchings 100 and the end plate 200 can be riveted through the riveting points.

[0076] Further, in this embodiment, please continue to refer to Figure 1 and Figure 7 The end plate 200 is provided with a magnetic isolation bridge 220 in the radial middle of the magnetic isolation hole 210. The magnetic isolation bridge 220 extends circumferentially and is connected to the opposite sides of the magnetic isolation hole 210. The radial width of the magnetic isolation bridge 220 is defined as W3, and T and W3 satisfy: T≤W3≤2×T. Referring to the above-mentioned magnetic isolation hole 210, the magnetic isolation bridge 220 extends in the circumferential direction, that is, the magnetic isolation bridge 220 and the two short sides of the magnetic isolation hole 210 are arranged in parallel. In this way, the magnetic isolation bridge 220 can further limit the width of the magnetic isolation hole 210 to be smaller than the width of the magnetic steel slot 110, and provide sufficient limiting effect for the magnetic steel 400 in the length direction of the magnetic isolation hole 210, so as to ensure the stability of the magnetic steel 400 in the magnetic steel slot 110. In particular, by limiting T≤W3≤2×T, it can be ensured that the magnetic isolation bridge 220 can stably limit the magnetic steel 400 in the magnetic steel slot 110, and also ensure that the magnetic steel 400 can form a magnetic flux through the magnetic isolation hole 210, thereby ensuring the output power of the motor or compressor. Of course, in other embodiments, the width of the magnetic isolation bridge 220 can also be between 2×T and 3×T.

[0077] Specifically, in this embodiment, please continue to refer to Figure 1 and Figure 7, the material of the end plate 200 is a magnetic material, and the magnetic permeability of the end plate 200 is greater than 1200. It can be understood that the end plate 200 has a magnetic isolation effect on the magnet 400, thereby reducing the magnetic leakage of the magnet 400. In this way, by limiting the size of the magnetic isolation hole 210 and the magnetic isolation bridge 220, while ensuring the stability of the magnet 400 in the magnet slot 110, the magnetic leakage of the magnet 400 is reduced, and it is also effectively ensured that the magnetic flux formed by the magnet 400 through the magnetic isolation hole 210 has a good magnetic density, while ensuring the structural stability of the rotor, it also improves the output power of the motor or compressor, or improves the durability and reliability of the magnet 400. In particular, for permanent magnets with a magnetic permeability greater than 1200, their magnetic isolation ability is stable, which can effectively reduce the magnetic leakage phenomenon of the magnet 400, thereby ensuring the output power of the rotor. In addition, the width W of the magnetic steel slot 110 also satisfies: WT / 10 to W+T / 10. In this way, while ensuring that the magnetic steel 400 can be adapted and installed in the magnetic steel slot 110, adapting to process errors and improving installation convenience, it also ensures that the width of the magnetic isolation hole 210 is effectively smaller than the width of the magnetic steel slot 110, thereby ensuring the stability of the magnetic steel 400 in the magnetic steel slot 110, and selecting a better size between reducing leakage flux and ensuring magnetic flux, thereby ensuring the output power of the motor and compressor. Of course, in other embodiments, the magnetic permeability of the end plate 200 can also be 800 or 1000.

[0078] In one embodiment, please refer to Figures 8 to 10The rotor sheet 100 includes a plurality of first rotor sheets 100 and second rotor sheets 100 respectively arranged at the two axial ends of the first rotor sheet 100. The outer periphery of the second rotor sheet 100 is continuously arranged, and the magnetic steel slots 110 of the first rotor sheet 100 are arranged through the outer periphery. It should be noted that the magnetic steel slots 110 of the first rotor sheet 100, which occupy a large number of the first rotor sheets 100, penetrate the outer periphery of the rotor sheet 100 in the radial direction of the first rotor sheet 100, and the side slot wall of the magnetic steel slot 110 close to the outer periphery of the first rotor sheet 100 has a limiting convex portion (not shown in the figure) for the magnetic steel slot 110, thereby ensuring the stability of the magnetic steel 400 in the magnetic steel slot 110, and the outer periphery of the first rotor sheet 100 is arranged to improve the magnetic flux density, ensure the interaction force between the stator and the rotor, and thus improve the output power of the motor or compressor. As for the second rotor punching 100, it is axially continuously arranged, that is, the side slot wall of the magnetic steel slot 110 close to the outer periphery of the second rotor punching 100 is continuously arranged, corresponding to the formation of a bridge 130 between the magnetic steel slot 110 and the stator. It can be understood that the structural strength of the second rotor punching 100 is greater than that of the first rotor punching 100. At the same time, the second rotor punching 100 is arranged between the first rotor punching 100 and the end plate 200, which can improve the integrity of the rotor core and prevent the magnetic steel 400 from moving out of the magnetic steel slot 110 under severe vibration. Of course, in other embodiments, the rotor punching 100 can also be configured as the first rotor punching 100 or the second rotor punching 100.

[0079] The utility model also provides a motor, which includes a stator and a rotor structure. The specific structure of the rotor structure refers to the above embodiment. Since the motor adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, a center hole is provided in the stator, and the rotor is rotatably arranged in the center hole.

[0080] The utility model also proposes a compressor, which includes the above-mentioned motor. The specific structure of the motor refers to the above-mentioned embodiment. Since the compressor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0081] The utility model also proposes a refrigeration device, which includes the above-mentioned compressor. The specific structure of the compressor refers to the above-mentioned embodiment. Since the refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0082] The above description is only an optional embodiment of the present invention, and does not limit the protection scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the protection scope of the present invention.

Claims

1. A rotor structure, characterized in that: include: A rotor core, wherein the rotor core is formed by stacking a plurality of rotor punching sheets, wherein the rotor punching sheets include an inner ring portion and a plurality of sector portions distributed circumferentially around the inner ring portion, and a magnetic steel slot is formed between two adjacent sector portions and the inner ring portion; A magnetic steel is installed in the magnetic steel slot; Among them, at least part of the side walls of the magnetic steel slots are provided with spring sheet groups, each of which includes at least two parallel spring sheets, the top of the spring sheet extends into the magnetic steel slot and abuts against the side wall of the magnetic steel to fix the magnetic steel.

2. The rotor structure according to claim 1, characterized in that: At least part of the fan-shaped portion has a side wall facing the magnetic steel slot with a notch groove, the notch groove is provided with the spring sheet group, and the spring sheets of the spring sheet group extend from the bottom of the notch groove to the slot opening.

3. The rotor structure according to claim 1, characterized in that: At least part of the spring sheet group is arranged on the outer periphery of the inner ring portion, and the spring sheets of the spring sheet group extend along the radial direction of the rotor punching sheet.

4. The rotor structure according to claim 1, characterized in that: The spring piece is narrow in the middle and wide at both ends.

5. The rotor structure according to claim 4, characterized in that: The bottom width of the spring sheet is defined as E, the middle width of the spring sheet is defined as C, and the top width of the spring sheet is defined as D, wherein C, D and E satisfy: C<D<E; And / or, the maximum width of the spring piece is defined as F, the length of the spring piece is defined as H, and F and H satisfy: H / 2≤F≤H.

6. The rotor structure according to claim 4, characterized in that: The top of the spring extending into the magnetic steel groove is provided with an arc with a central angle of 10° to 20°, and the arc is used to abut against the magnetic steel.

7. The rotor structure according to claim 1, characterized in that: The lengths of two spring pieces in the same spring piece group are defined as H1 and H2 respectively, and H1 and H2 satisfy: H1<H2.

8. The rotor structure according to claim 1, characterized in that: The radial length of the magnetic steel slot is defined as J, the circumferential width of the magnetic steel slot is defined as W, the length of the spring sheet is defined as H, and the distance from the root of the spring sheet to the side wall of the magnetic steel slot is defined as M; The H, the J and the W satisfy: H=(J / W)×A×k, wherein 1<k<1.1, A=HM.

9. The rotor structure according to claim 8, characterized in that: The thickness of the rotor punching sheet is defined as T, and T and A satisfy: T / 5≤A≤T / 2; And / or, the number of rotor poles of the rotor structure is defined as p, and the moving distance of the spring piece in the axial direction of the rotor core is between A×tan(360° / p / 2) and A×tan(360° / p).

10. The rotor structure according to claim 1, characterized in that: The side wall of the magnetic steel slot is also recessed with an avoidance groove, and the avoidance groove on one of the rotor punching sheets corresponds to the spring sheet on the axially adjacent rotor punching sheet. In the installation direction of the magnetic steel, a plurality of the avoidance grooves are located on the same side of the axially adjacent spring sheets along the rotor core.

11. The rotor structure according to claim 10, characterized in that: The number of rotor poles of the rotor structure is defined as p, and the radial angle between the adjacent avoidance grooves and the spring sheets on the same rotor punching sheet satisfies: 360° / p or 360° / (p / 2).

12. The rotor structure according to claim 1, characterized in that: The number of the spring sheet groups is defined as 2K or 4K, the number of rotor poles of the rotor structure is defined as p, and K and p satisfy: 1≤K≤p / 2.

13. The rotor structure according to claim 12, characterized in that: The magnetic steel grooves provided with the spring sheet groups are evenly distributed along the circumference of the rotor punching sheet, and a plurality of the spring sheet groups are distributed along the same circumference or radial side of the same rotor punching sheet; And / or, the number of magnetic steel slots provided with the spring sheets is defined as m, and the m and p satisfy: m≤(pm).

14. The rotor structure according to any one of claims 1 to 13, characterized in that: End plates are provided at both ends of the rotor core, and the end plates are provided with a plurality of magnetic isolation holes, the plurality of magnetic isolation holes are opposite to the plurality of magnetic steel slots in the axial direction, the circumferential width of the magnetic isolation holes is defined as W2, and the thickness of the rotor punching sheet is defined as T; The T, the W and the W2 satisfy: W≥(W2+2×T).

15. The rotor structure according to claim 14, characterized in that: The end plate is provided with a magnetic isolation bridge in the radial middle of the magnetic isolation hole, the magnetic isolation bridge extends in the circumferential direction and is connected to two opposite sides of the magnetic isolation hole, and the radial width of the magnetic isolation bridge is defined as W3, and T and W3 satisfy: T≤W3≤2×T; And / or, the material of the end plate is a magnetic material, and the magnetic permeability of the end plate is greater than 1200; And / or, the rotor punching includes a plurality of first rotor punchings and second rotor punchings arranged at both axial ends of the first rotor punchings, the outer periphery of the second rotor punchings is continuously arranged, and the magnetic steel slots of the first rotor punchings are arranged through the outer periphery.

16. A motor, characterized in that: The invention comprises a stator and a rotor structure as claimed in any one of claims 1 to 15.

17. A compressor, characterized in that: Comprising the motor as claimed in claim 16.

18. A refrigeration device, characterized in that: Comprising the compressor of claim 17.

Images