Rotor punching sheet, rotor, motor, compressor and refrigeration equipment

Abstract

The utility model discloses a rotor punching sheet, a rotor, a motor, a compressor and refrigeration equipment, and relates to the technical field of motors, a plurality of magnetic steel grooves are distributed along the circumferential direction of the rotor punching sheet, an inter-pole air groove is formed between two adjacent magnetic steel grooves, and the inter-pole air groove is communicated with the magnetic steel grooves. One side, adjacent to the periphery of the rotor punching sheet, of at least a part of the inter-electrode air grooves is provided with a broken bridge, and the broken bridge forms a passing opening which is communicated with the inter-electrode air grooves and the periphery of the rotor punching sheet. According to the technical scheme provided by the utility model, an armature reaction magnetic field is inhibited and the friction loss is reduced by arranging the passing openings on the broken bridges of the inter-electrode air slots.

Description

Technical Field

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

[0002] In the field of motor technology, the design of the rotor structure is a key factor affecting the efficiency of the motor. The energy loss caused by air resistance and friction inside the motor during operation is called wind friction loss, which directly affects the efficiency and energy consumption of the motor. For the compressor, its internal motor structure needs to promote the circulation of refrigeration oil. In this way, the process of rotor rotation will generate more energy loss due to the resistance of refrigeration oil and refrigerant, thereby reducing the efficiency of the compressor and increasing energy consumption. Utility Model Content

[0003] The main purpose of the utility model is to provide a rotor punching sheet, a rotor, a motor, a compressor and a refrigeration device, which can suppress the armature reaction magnetic field and reduce the friction loss by arranging a pass on the broken bridge of the interpolar air slot.

[0004] To achieve the above-mentioned purpose, the rotor punching proposed in the utility model has a plurality of magnetic steel slots distributed along the circumferential direction, an interpolar air slot is formed between two adjacent magnetic steel slots, at least part of the interpolar air slots is provided with a thermal break on one side adjacent to the outer periphery of the rotor punching, and the thermal break forms a passage connecting the interpolar air slot and the outer periphery of the rotor punching.

[0005] In one embodiment, the width of the transition gradually increases from the interpole air groove to the outer periphery of the rotor punching, the width of the transition on one side of the interpole air groove is d4, and the width of the transition on one side of the outer periphery of the rotor punching is d5, and d4 and d5 satisfy: d4≤d5.

[0006] In one implementation, the minimum radial width of the broken bridge is d1, and d1 satisfies: 0.35 mm≤d1≤0.5 mm.

[0007] In one implementation, the d1 and the d4 satisfy: 0.5×d1≤d4≤3×d1.

[0008] In one embodiment, the minimum distance from the inter-polar air slot to the adjacent magnetic steel slot is d2, and d2 and d1 satisfy: 0.5×d1≤d2≤1.5×d1.

[0009] In one embodiment, the rotor punching has a rotation center, the maximum distance from the outer periphery of the rotor punching to the rotation center is D1, the minimum distance from the magnetic steel slot to the rotation center is D2, and the difference between the minimum distance from the interpolar air slot to the rotation center and D2 is d3, satisfying: (D1-D2)×0.6≤d3≤(D1-D2)×0.9.

[0010] In one embodiment, the minimum radial width of the broken bridge is d1, which satisfies: (D1-d1-D2)×0.6≤d3≤(D1-d1-D2)×0.9.

[0011] In one embodiment, the magnetic steel slot includes two inclined slot segments symmetrically arranged in the radial direction of the rotor punching, and the two inclined slot segments located in different magnetic steel slots and adjacent to each other in the circumferential direction of the rotor punching are arranged at a first angle, and the first angle is gradually expanded toward the rotation center. The angle of the first angle is θ, the area of ​​the interpolar air slot is S, and the minimum distance between two adjacent magnetic steel slots in the circumferential direction of the rotor punching is L, satisfying: 0.25×π×(D1-d1-D2-d3)^2≤S≤L×(D1-d1-D2-d3)+tan(0.5×θ)×(D1-d1-D2-d3)^2.

[0012] In one embodiment, each of the plurality of inter-electrode air slots is provided with a through opening.

[0013] In one embodiment, on the diameter passing through the middle between two adjacent magnetic steel slots, the openings of the inter-polar air slots are arranged on the same side or on different sides in the circumferential direction.

[0014] In one embodiment, the through-opening is provided in one of two inter-pole air slots that are opposite to each other in the radial direction of the rotor punching, and a plurality of the through-openings are distributed in a circumferential direction of the rotor punching with one inter-pole air slot spaced therebetween.

[0015] The utility model also provides a rotor, which includes the rotor punching sheet as mentioned above.

[0016] In one embodiment, in the same axial direction of the rotor, the openings of adjacent rotor punching sheets are alternately distributed.

[0017] In one embodiment, part of the rotor punching sheets are stacked into a first punching sheet group, and another part of the rotor punching sheets are stacked into a second punching sheet group. The first punching sheet group is arranged at the end of the second punching sheet group. In the same axial direction of the rotor, the axial lengths of the second punching sheet group and a single first punching sheet group are Q2 and Q1 respectively, satisfying: 0.5≤Q2 / Q1≤8.

[0018] The utility model also provides a motor, which comprises the rotor as described above.

[0019] The utility model also provides a compressor, which comprises the rotor as described above.

[0020] The utility model also provides a refrigeration device, which includes the motor as described above, or includes the compressor as described above.

[0021] The technical solution of the utility model sets an interpolar air groove between any two adjacent magnetic steel grooves distributed circumferentially of the rotor punching. The interpolar air groove not only reduces the magnetic leakage of the magnetic steel at the end adjacent to the outer periphery of the rotor punching, but also improves the magnetic focusing effect of the motor. At the same time, at least part of the interpolar air groove is adjacent to the outer periphery of the rotor punching. The side of the outer periphery of the rotor punching is set as a broken bridge, and the interpolar air groove and the outer periphery of the rotor punching are connected through the opening on the broken bridge. In this way, during the operation of the motor, the broken bridge prevents the flow of air or fluid between the interpolar air groove and the air gap of the motor, reduces the friction loss in the motor, thereby reducing the impact on the compressor fluid, and the opening can reduce the armature reaction magnetic field, thereby significantly reducing the iron loss generated by the armature reaction, thereby improving the efficiency of the motor or compressor and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 A schematic structural diagram of an embodiment of a rotor punching provided by the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0025] Figure 3 A schematic structural diagram of another embodiment of the rotor punching provided by the utility model;

[0026] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0027] Figure 5 A schematic structural diagram of another embodiment of the rotor punching provided by the utility model;

[0028] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0029] Figure 7A schematic structural diagram of a rotor embodiment provided by the utility model;

[0030] Figure 8 This is a schematic structural diagram of another embodiment of the rotor provided by the utility model.

[0031] Description of Figure Numbers:

[0032] 100, rotor punching; 110, magnetic steel slot; 111, chute section; 120, interpolar air slot; 130, broken bridge; 131, pass; 140, flow hole; 150, riveting hole;

[0033] 210, first punching sheet group; 220, second punching sheet group.

[0034] 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

[0035] 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.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] 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 limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy 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 combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] Refrigeration equipment is one of the indispensable equipment in modern life, such as air conditioners and refrigerators, and one of its core components is the compressor. Among them, the motor is the core driving part of the compressor, and its efficiency directly affects the performance and energy consumption of the compressor. Therefore, improving the efficiency of the motor is an important way to improve the performance of the compressor. In the field of motor technology, the design of the rotor structure is a key factor affecting the efficiency of the motor. However, the traditional motor is prone to energy loss due to air resistance and friction. Especially for motors that use inter-pole sinking rotor structures to improve efficiency, due to the sinking design of the rotor, the fluid in the compressor will generate wind friction loss, which not only reduces the efficiency of the compressor, but also increases energy consumption. In the related art, non-magnetic conductive materials are filled in the traditional inter-pole sinking. This design can ensure that the motor efficiency is improved while reducing the wind friction loss in the compressor, thereby improving the efficiency of the compressor system. However, the filling material will increase the cost of the motor, and the motor of the compressor has a high operating speed. After the filling material, the reliability and life of the compressor rotor will also decrease.

[0039] The utility model provides a rotor punching sheet 100 .

[0040] See also Figure 1 and Figure 2 In one embodiment of the utility model, the rotor punching 100 has a plurality of magnetic steel slots 110 distributed along the circumferential direction, and an interpolar air slot 120 is formed between two adjacent magnetic steel slots 110. At least part of the interpolar air slots 120 are provided with a broken bridge 130 on one side adjacent to the outer periphery of the rotor punching 100, and the broken bridge 130 forms a passage 131 connecting the interpolar air slot 120 and the outer periphery of the rotor punching 100.

[0041] The technical solution of the utility model sets an interpolar air slot 120 between any two adjacent magnetic steel slots 110 distributed circumferentially of the rotor punching 100. The interpolar air slot 120 reduces the magnetic leakage of the magnetic steel at the end adjacent to the outer periphery of the rotor punching 100, and also improves the magnetic concentration effect of the motor. At the same time, at least part of the interpolar air slot 120 is adjacent to the outer periphery of the rotor punching 100. The side of the outer periphery is set as a broken bridge 130, and the interpolar air slot 120 and the outer periphery of the rotor punching 100 are connected through the through-port 131 on the broken bridge 130. In this way, during the operation of the motor, the broken bridge 130 prevents the air or fluid from flowing between the interpolar air slot 120 and the air gap of the motor, thereby reducing the friction loss in the motor, thereby reducing the impact on the compressor fluid, and the through-port 131 can reduce the armature reaction magnetic field, thereby significantly reducing the iron loss generated by the armature reaction, thereby improving the efficiency of the motor or compressor and reducing energy consumption.

[0042] Among them, with the diameter of the rotor punching 100 passing through the middle of the interval between two circumferentially adjacent magnetic steel slots 110 as a reference, the opening 131 on the broken bridge 130 can be on the diameter or on one side of the diameter in the circumferential direction. For the two interpolar air slots 120 on the diameter, when the two interpolar air slots 120 are both provided with openings 131, the two openings 131 are located on the same side or different sides of the circumferential direction of the above diameter. It can be understood that the interpolar air slots 120 can be configured as a symmetrical structure with the above diameter as the symmetry axis. Of course, the interpolar air slots 120 can also be configured as an asymmetrical structure. In addition, for the sake of balance, the interpolar air slots 120 with the broken bridges 130 can be distributed on the same diameter of the rotor punching 100, or, one of the two interpolar air slots 120 in the same radial direction of the rotor punching 100 can be provided with a broken bridge 130, and the other can be provided with a connecting bridge. Of course, the interpolar air slots 120 with the broken bridges 130 on a single rotor punching 100 can be arbitrarily distributed in the circumferential direction of the rotor punching 100, and a balancing treatment can be performed when stacking to form the rotor core.

[0043] In one embodiment, please refer to Figure 2 , Figure 4 , Figure 6 , the width of the opening 131 from the interpolar air slot 120 to the outer periphery of the rotor sheet 100 gradually increases, the width of the opening 131 on one side of the interpolar air slot 120 is d4, and the width of the opening 131 on the outer periphery of the rotor sheet 100 is d5, and d4 and d5 satisfy: d4≤d5. It can be understood that the broken bridge 130 has a certain width in the radial direction of the rotor sheet 100, and the opening of the opening 131 on the side close to the rotation center of the rotor sheet 100 is smaller than the opening on the side away from the center of the rotor sheet 100, that is, the effect of setting the broken bridge 130 on reducing the friction loss in the motor is improved, and the magnetic resistance of the armature reaction magnetic field is increased by increasing the width of the opening 131 close to the air gap as much as possible, and the iron loss generated by the armature reaction is reduced, thereby improving the efficiency of the motor or compressor. Among them, in the direction away from the rotation center of the rotor sheet 100 in the radial direction, the width of the opening 131 increases, which is reflected in the effect of gradually suppressing the armature reaction magnetic field, ensuring the stability of the operation of the motor or compressor. Of course, in other embodiments, in the direction radially away from the rotation center of the rotor punching 100, the width of the opening 131 may increase in a step-like manner, or the width of the opening 131 may remain uniform, or the width of the opening 131 may gradually decrease.

[0044] In this embodiment, please refer to Figure 2 , Figure 4 , Figure 6, the minimum radial width of the broken bridge 130 is d1, and d1 satisfies: 0.35mm≤d1≤0.5mm. It should be noted that the radial width of the broken bridge 130 in the rotor punching 100 affects the position of the interpolar air slot 120 relative to the magnetic steel slot 110. The minimum radial width of the broken bridge 130 is defined to be between 0.35mm and 0.5mm, which ensures the magnetic resistance effect of the interpolar air slot 120 at this location, thereby ensuring the magnetic concentration and magnetic conduction effect of the motor, and improving the operating power of the motor or compressor. It can be understood that under the specifications of the rotor punching 100 of this scheme, if d1 is less than 0.35mm, the radial thickness of the broken bridge 130 is too small, which is easy to be damaged during the operation of the motor; similarly, if d1 is greater than 0.5mm, the magnetic steel is prone to magnetic leakage, which weakens its ability to concentrate the rotor and resist demagnetization. Of course, in other embodiments, if the specifications of the rotor punching 100 increase or decrease, the minimum radial width of the broken bridge 130 will also change synchronously.

[0045] Further, in this embodiment, please refer to Figure 2 , Figure 4 and Figure 6 , d1 and d4 satisfy: 0.5×d1≤d4≤3×d1. It can be understood that the width of the port 131 close to the inter-pole air slot 120 is controlled to be between 0.5 and 3 times the minimum radial width of the broken bridge 130, so that the circumferential opening of the port 131 is in an adaptive range, which not only ensures that the width of the port 131 can better reduce the armature reaction magnetic field, but also avoids the port 131 from being too wide, weakening its effect on reducing friction loss, and ensuring the strength of the broken bridge 130, thereby ensuring the efficiency of the motor or compressor. Of course, in other embodiments, the circumferential width of the port 131 and the radial width of the broken bridge 130 can also be set independently of each other.

[0046] In one embodiment, please refer to Figure 2 , Figure 4 and Figure 6 , the minimum distance between the interpolar air slot 120 and the adjacent magnetic steel slot 110 is d2, and d2 and d1 satisfy: 0.5×d1≤d2≤1.5×d1. It can be understood that the radial width of the broken bridge 130 and d2 are changed synchronously, so that the position of the interpolar air slot 120 is adapted to the specifications of the rotor punching 100, so that the piece-count air slot can be arranged adjacent to the magnetic steel slot 110, thereby ensuring the role of the interpolar air slot 120 in reducing magnetic steel magnetic leakage, and at the same time, improving the anti-demagnetization ability of the magnetic steel, thereby improving the efficiency of the motor or compressor. Of course, in other embodiments, the spacing between the interpolar air slot 120 and the magnetic steel slot 110 and the radial width of the broken bridge 130 can also be set independently of each other.

[0047] In one embodiment, please refer to Figure 1 , Figure 3 and Figure 5, the rotor sheet 100 has a rotation center, the maximum distance from the outer periphery of the rotor sheet 100 to the rotation center is D1, the minimum distance from the magnetic steel slot 110 to the rotation center is D2, and the difference between the minimum distance from the interpolar air slot 120 to the rotation center and D2 is d3, which satisfies: (D1-D2)×0.6≤d3≤(D1-D2)×0.9. It can be understood that D1-D2 defines the radial length of the magnetic steel slot 110 from the side close to the rotation center to the outer periphery of the rotor sheet 100, and d3 is defined to be between 0.6 and 0.9 of the radial length to ensure that the position of the interpolar air slot 120 is located adjacent to the outer periphery of the rotor sheet 100, and the interpolar air slot 120 is used to reduce the leakage magnetic flux of the end of the magnetic steel close to the outer periphery of the rotor sheet 100 by utilizing the large magnetic resistance of the interpolar air slot 120, and at the same time, the anti-demagnetization ability of the magnetic steel at the end is improved, thereby improving the efficiency of the motor or compressor. In addition, when the interpolar air slot 120 has a portion adjacent to the outer periphery of the rotor sheet 100, the interpolar air slot 120 is prevented from being too close to the rotation center of the rotor sheet 100, thereby ensuring the magnetic flux density of the rotor and thus ensuring the efficiency of the motor or compressor. Of course, in other embodiments, when most of the interpolar air slot 120 is disposed adjacent to the outer periphery of the rotor sheet 100, a small portion of the interpolar air slot 120 may also be disposed closer to the rotation center of the rotor sheet 100, or the interpolar air slot 120 between two adjacent magnetic steel slots 110 may also be configured as a plurality of independent slots, or a plurality of slots connected by openings, and the d3 of most of the slots meets the requirements of the above formula, and the d3 of a small portion of the slots may also be between 0.5 (D1-D2) and 0.6 (D1-D2).

[0048] Specifically, in this embodiment, please refer to Figure 1 , Figure 3 and Figure 5, the minimum radial width of the broken bridge 130 is d1, which satisfies: (D1-d1-D2)×0.6≤d3≤(D1-d1-D2)×0.9. It can be understood that D1-d1-D2 defines the radial length of the magnetic steel slot 110 in the rotor sheet 100, and d3 is defined to be between 0.6 and 0.9 of the radial length to ensure that the position of the interpolar air slot 120 is located adjacent to the outer periphery of the rotor sheet 100, and the interpolar air slot 120 is used to reduce the leakage magnetic flux of the end of the magnetic steel close to the outer periphery of the rotor sheet 100. At the same time, the influence of the radial width d1 of the broken bridge 130 is proposed to ensure that the position of the interpolar air slot 120 is adjacent to the position of the magnetic steel slot 110, thereby improving the anti-demagnetization ability of the magnetic steel at the end, thereby improving the efficiency of the motor or compressor. Similarly, when the interpolar air slot 120 has a portion adjacent to the outer periphery of the rotor sheet 100, the interpolar air slot 120 is prevented from being too close to the rotation center of the rotor sheet 100 to ensure the magnetic flux density of the rotor, thereby ensuring the efficiency of the motor or compressor.

[0049] In one embodiment, please refer to Figure 1 , Figure 3 and Figure 5 The magnetic steel slot 110 includes two inclined slot sections 111 symmetrically arranged in the radial direction of the rotor punching 100. The two inclined slot sections 111 located in different magnetic steel slots 110 and adjacent to each other in the circumferential direction of the rotor punching 100 are arranged at a first angle, and the first angle is gradually expanded toward the rotation center. The angle of the first angle is θ, the area of ​​the interpolar air slot 120 is S, and the minimum distance between two adjacent magnetic steel slots 110 in the circumferential direction of the rotor punching 100 is L, satisfying: 0.25×π×(D1-d1-D2-d3)^2≤S≤L×(D1-d1-D2-d3)+tan(0.5×θ)×(D1-d1-D2-d3)^2. It can be understood that 0.25×π×(D1-d1-D2-d3)^2 represents the area of ​​a circle with the radial length of the interpolar air slot 120 in the rotor sheet 100 as the diameter, and L×(D1-d1-D2-d3)+tan(0.5×θ)×(D1-d1-D2-d3)^2 represents the area of ​​a circle with the radial length of the interpolar air slot 120 in the rotor sheet 100 as the diameter. Figure 2 , Figure 4 or Figure 6The area of ​​the inter-electrode air groove 120 is shown to be an isosceles trapezoid. It should be noted that, under the limiting condition of 0.5×d1≤d2≤1.5×d1, the area of ​​the circle formed by the radial length of the interpolar air slot 120 in the rotor punching 100 as the diameter is the minimum area that the interpolar air slot 120 can achieve; similarly, under the limiting condition of 0.5×d1≤d2≤1.5×d1, the two waist sides of the isosceles trapezoid are respectively parallel to the inclined slot section 111 in the adjacent magnetic steel slot 110. It can be seen that the area of ​​the isosceles trapezoid is the maximum area that the interpolar air slot 120 can reach. Therefore, the area of ​​the interpolar air slot 120 is limited to be between the above-mentioned circular area and the above-mentioned trapezoidal area, so as to achieve all the shapes that the interpolar air slot 120 can form under the limiting condition of 0.5×d1≤d2≤1.5×d1, thereby ensuring the effect of the interpolar air slot 120 on reducing magnetic steel magnetic leakage, and at the same time, also ensuring the anti-demagnetization ability of the magnetic steel, thereby improving the efficiency of the motor or compressor. Of course, in other embodiments, when d1 and d2 are independently set, the area of ​​a single inter-electrode air groove 120 may also be smaller than π×(D1-d1-D2-d3)^2.

[0050] In one embodiment, please refer to Figure 1 and Figure 2 , multiple inter-pole air slots 120 are all provided with openings 131, so that in the process of stacking multiple rotor punchings 100 into a rotor core, it is not necessary to consider the position of the inter-pole air slots 120 where the broken bridges 130 or the openings 131 are set, thereby improving the assembly convenience of the rotor. At the same time, the broken bridges 130 or the openings 131 are evenly spaced at the outer circumference of the rotor punchings 100, and during the rotation of the rotor, the effect of reducing the armature reaction magnetic field and reducing the wind friction loss of the compressor motor can be well balanced at various locations of the rotor in the circumferential direction.

[0051] In one embodiment, please refer to Figure 3 and Figure 4On the diameter passing through the middle between two adjacent magnetic steel slots 110, the openings 131 of the interpolar air slots 120 are arranged on the same side or on different sides in the circumferential direction. Taking the diameter passing through the middle of the interval between two circumferentially adjacent magnetic steel slots 110 on the rotor punching 100 as a reference, the openings 131 on the broken bridge 130 are on one side of the circumferential direction of the diameter. Of the two interpolar air slots 120 passing through the diameter, one may be provided with a broken bridge 130, or both may be provided with a broken bridge 130. In the case where both are provided with a broken bridge 130, the openings 131 of the two interpolar air slots 120 are opened symmetrically around the rotation center of the rotor punching 100, or are arranged on the same side of the circumferential direction of the diameter. In addition, for the sake of balance, when a thermal break 130 is provided on one of the two interpolar air slots 120 in the same radial direction of the rotor punching 100 and a continuous bridge or an open setting is provided on the other, the interpolar air slots 120 with the thermal break 130 on a single rotor punching 100 can be randomly distributed in the circumferential direction of the rotor punching 100, and can be balanced by rotating or interlacing when stacking to form the rotor core.

[0052] In one embodiment, please refer to Figure 5 and Figure 6 , one of the two interpolar air slots 120 opposite to each other in the radial direction of the rotor sheet 100 is provided with a through opening 131, and in the circumferential direction of the rotor sheet 100, a plurality of through openings 131 are distributed with one interpolar air slot 120 spaced apart. It can be understood that one of the two interpolar air slots 120 in the same radial direction is provided with a broken bridge 130, and the other is provided with a connecting bridge or an open setting, and at the same time, in the circumferential direction of the rotor sheet 100, the interpolar air slots 120 with a connecting bridge or an open setting and the interpolar air slots 120 with a broken bridge 130 are alternately distributed, thereby balancing the structural strength of the rotor sheet 100 in the circumferential direction, and also ensuring the effect of reducing the armature reaction magnetic field and reducing the wind friction loss of the compressor motor.

[0053] The utility model also proposes a rotor, which includes a magnetic steel and a plurality of rotor punchings 100. The specific structure of the rotor punchings 100 refers to the above-mentioned embodiment. Since the rotor 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.

[0054] Among them, Figure 1 As shown, the rotor punching 100 is provided with a rivet hole 150, and a plurality of rotor punchings 100 are stacked through the rivet hole 150 to form a rotor core. The magnet is installed in the magnet slot 110, and the stator is fixed to the outer periphery of the rotor core. The structure of the inter-pole air slot 120 and the broken bridge 130 is utilized to ensure the effect of reducing the armature reaction magnetic field to reduce iron loss and reducing the wind friction loss of the compressor motor.

[0055] Further, in this embodiment, please refer to Figures 5 to 7 , in the same axial direction of the rotor, the openings 131 of adjacent rotor punchings 100 are alternately distributed. It can be understood that one of the interpolar air slots 120 at both radial ends of the rotor punching 100 is provided with a broken bridge 130, and the other is provided with a connecting bridge, and the center angle of the adjacent interpolar air slots 120 provided with a connecting bridge and the interpolar air slots 120 provided with a broken bridge 130 is π / p, where p is the number of rotor poles. In this way, in the process of stacking multiple rotor punchings 100, the angle at which two adjacent rotor punchings 100 rotate relative to each other is an integer multiple of π / p, thereby better averaging the balance and structural strength of the rotor, and achieving a better effect of reducing the armature reaction magnetic field and reducing the wind friction loss of the compressor motor in a balanced manner at all locations in the circumferential direction of the rotor.

[0056] In another embodiment, please refer to Figure 5 and Figure 8 Part of the rotor punching sheets 100 are stacked into a first punching sheet group 210, and the other part of the rotor punching sheets 100 are stacked into a second punching sheet group 220. The first punching sheet group 210 is arranged at the end of the second punching sheet group 220. In the same axial direction of the rotor, the axial lengths of the second punching sheet group 220 and the single first punching sheet group 210 are Q2 and Q1 respectively, satisfying: 0.5≤Q2 / Q1≤8. It should be noted that the multiple rotor punching sheets 100 on the first punching sheet group 210 or the second punching sheet group 220 can be stacked without rotation or can be stacked by rotation. In the first punching sheet group 210, the second punching sheet group 220, the first punching sheet group 210 and the second punching sheet group 220, one of the interpole air slots 120 at the radial ends of the rotor punching sheets 100 is provided with a thermal break 130, and the other is provided with a connecting bridge, wherein the central angle of adjacent interpole air slots 120 provided with a connecting bridge and the interpole air slots 120 provided with a thermal break 130 is π / p, and p is the number of rotor poles. In this way, the openings 131 of adjacent rotor punches 100 in the first punch group 210 or the second punch group 220 are alternately distributed, or continuously distributed in the same axial direction, while the openings 131 or the broken bridges 130 in the first punch group 210 and the second punch group 220 are staggered, thereby better averaging the balance and structural strength of the rotor, and achieving a better effect of balancing the reduction of the armature reaction magnetic field and the reduction of the wind friction loss of the compressor motor at various circumferential locations of the rotor.

[0057] The utility model also provides a motor, which includes a rotor and a stator. The specific structure of the rotor 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. The rotor is rotatably inserted into the center hole of the stator.

[0058] The utility model also provides a compressor, which includes a rotor and a stator. The specific structure of the rotor refers to the above embodiment. Since the compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Figure 1 As shown, the outer periphery of the stator is fixed to the compressor housing, and the refrigeration oil and refrigerant in the compressor are directly passed through the flow holes 140 of the rotor punching 100 to achieve energy circulation; or, the outer periphery of the stator is fixed to the motor housing, and then the motor is installed in the compressor housing.

[0059] The utility model also proposes a refrigeration device, which includes a motor or a compressor. The specific structure of the motor or the compressor refers to the above embodiment. Since the refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0060] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotor punching, characterized in that: The rotor punching sheet is provided with a plurality of magnetic steel slots distributed along the circumferential direction, and an interpolar air slot is formed between two adjacent magnetic steel slots. At least part of the interpolar air slots is provided with a thermal break bridge on one side adjacent to the outer periphery of the rotor punching sheet, and the thermal break bridge forms a passage connecting the interpolar air slot and the outer periphery of the rotor punching sheet.

2. The rotor punching according to claim 1, characterized in that: The width of the transition gradually increases from the inter-pole air groove to the outer periphery of the rotor punching, the width of the transition on one side of the inter-pole air groove is d4, the width of the transition on the outer periphery of the rotor punching is d5, and d4 and d5 satisfy: d4≤d5.

3. The rotor punching according to claim 2, characterized in that: The minimum radial width of the broken bridge is d1, and d1 satisfies: 0.35mm≤d1≤0.5mm.

4. The rotor punching according to claim 3, characterized in that: The d1 and the d4 satisfy: 0.5×d1≤d4≤3×d1.

5. The rotor punching according to claim 3, characterized in that: The minimum distance from the inter-pole air slot to the adjacent magnetic steel slot is d2, and d2 and d1 satisfy: 0.5×d1≤d2≤1.5×d1.

6. The rotor punching according to claim 1, characterized in that: The rotor punching has a rotation center, the maximum distance from the outer periphery of the rotor punching to the rotation center is D1, the minimum distance from the magnetic steel slot to the rotation center is D2, and the difference between the minimum distance from the interpolar air slot to the rotation center and D2 is d3, satisfying: (D1-D2)×0.6≤d3≤(D1-D2)×0.

9.

7. The rotor punching according to claim 6, characterized in that: The minimum radial width of the broken bridge is d1, which satisfies: (D1-d1-D2)×0.6≤d3≤(D1-d1-D2)×0.

9.

8. The rotor punching according to claim 7, characterized in that: The magnetic steel slot includes two inclined slot sections symmetrically arranged in the radial direction of the rotor punching, and the two inclined slot sections located in different magnetic steel slots and adjacent to each other in the circumferential direction of the rotor punching are arranged at a first angle, and the first angle is gradually expanded toward the rotation center. The angle of the first angle is θ, the area of ​​the interpolar air slot is S, and the minimum distance between two adjacent magnetic steel slots in the circumferential direction of the rotor punching is L, satisfying: 0.25×π×(D1-d1-D2-d3)^2≤S≤L×(D1-d1-D2-d3)+tan(0.5×θ)×(D1-d1-D2-d3)^2.

9. The rotor lamination according to any one of claims 1 to 8, characterized in that The plurality of inter-electrode air slots are all provided with the said port; And / or, on the diameter passing through the middle between two adjacent magnetic steel slots, the openings of the interpolar air slots are arranged on the same side or on different sides in the circumferential direction.

10. The rotor lamination according to any one of claims 1 to 8, characterized in that The through-port is provided in one of the two inter-pole air slots that are opposite to each other in the radial direction of the rotor punching sheet, and a plurality of the through-ports are distributed in the circumferential direction of the rotor punching sheet with one inter-pole air slot therebetween.

11. A rotor, characterized in that: Comprising a rotor punching sheet as claimed in any one of claims 1 to 10.

12. The rotor according to claim 11, characterized in that In the same axial direction of the rotor, the openings of adjacent rotor punching sheets are alternately distributed; Or, part of the rotor punching sheets are stacked into a first punching sheet group, and another part of the rotor punching sheets are stacked into a second punching sheet group, the first punching sheet group is arranged at the end of the second punching sheet group, and in the same axial direction of the rotor, the axial lengths of the second punching sheet group and a single first punching sheet group are Q2 and Q1 respectively, satisfying: 0.5≤Q2 / Q1≤8.

13. A motor, characterized in that: Comprising a rotor as claimed in claim 11 or 12.

14. A compressor, characterized in that: Comprising a rotor as claimed in claim 11 or 12.

15. A refrigeration device, characterized in that: Includes the motor as claimed in claim 13, or, includes the compressor as claimed in claim 14.

Images