CN220382820U - Stator punching sheet, stator core, motor, compressor and refrigeration equipment - Google Patents

Abstract

The utility model discloses a stator punching sheet, a stator core, a motor, a compressor and refrigeration equipment, wherein the stator punching sheet comprises a yoke part, a plurality of tooth parts and a plurality of concave structures, and the tooth parts are arranged on the inner peripheral surface of the yoke part and are distributed at intervals along the circumferential direction of the yoke part; the plurality of concave structures are arranged on the outer peripheral surface of the yoke part, each concave structure comprises a first concave part, a second concave part and a transition part connected between the first concave part and the second concave part, the first concave part and the second concave part are respectively arranged on the yoke parts corresponding to the adjacent two tooth parts, the first concave part and the second concave part are respectively arranged on the central lines of the corresponding tooth parts, the transition part is arranged between the yoke parts corresponding to the adjacent two tooth parts, and the maximum distance between the transition part and the circle center of the yoke part is smaller than half of the outer diameter of the yoke part. The technical scheme of the utility model can improve stator fixed frequency and reduce high-frequency carrier noise of the motor.

Description

Stator punching sheet, stator core, motor, compressor and refrigeration equipment

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to a stator punching sheet, a stator core, a motor, a compressor and refrigeration equipment.

Background

The existing household air conditioner compressor motor mainly adopts a variable frequency motor, the input current of the variable frequency motor is a modulation wave, and the carrier wave of the modulation wave is a high-frequency carrier wave. When the motor is improperly designed, noise and vibration of the frequency band of the motor and the compressor near the carrier wave are deteriorated, thereby affecting the performance of the motor and the compressor and also severely affecting the hearing feeling of the user.

Disclosure of Invention

The utility model mainly aims to provide a stator punching sheet, which aims to improve stator fixed frequency and reduce high-frequency carrier noise of a motor.

In order to achieve the above object, the present utility model provides a stator lamination, comprising:

the yoke portion is provided with a plurality of grooves,

a plurality of teeth arranged on the inner peripheral surface of the yoke at intervals along the circumferential direction of the yoke; and

the plurality of concave structures are arranged on the outer peripheral surface of the yoke part, each concave structure comprises a first concave part, a second concave part and a transition part connected between the first concave part and the second concave part, the first concave part and the second concave part are respectively arranged on the yoke parts corresponding to the adjacent two tooth parts, the first concave part and the second concave part are respectively arranged on the central lines of the corresponding tooth parts, the transition part is arranged between the yoke parts corresponding to the adjacent two tooth parts, and the maximum distance between the transition part and the circle center of the yoke part is smaller than half of the outer diameter of the yoke part.

Optionally, in the radial direction of the yoke, a relationship among a maximum distance Lmax between the transition portion and a center of the yoke, an outer diameter D of the yoke, and a width b of the yoke satisfies: the ratio of (D/2-Lmax)/b is more than or equal to 0.05 and less than or equal to 0.15.

Optionally, on a section perpendicular to the central axis of the yoke portion, the transition portion is in a linear structure or the transition portion is in an arc structure;

and/or the bottom wall of the first concave part and/or the bottom wall of the second concave part are in a linear structure;

and/or the bottom wall of the first concave part and/or the bottom wall of the second concave part is in an arc structure.

Optionally, the grooves formed between two adjacent tooth parts are stator grooves, the number of the stator grooves is Q, k concave structures are arranged, and k is greater than or equal to 3 and smaller than Q/2.

Alternatively, k is equal to 4.

Optionally, the number Q of stator slots satisfies: q is less than or equal to 12.

Alternatively, Q is equal to 12.

The utility model also provides a stator core, which comprises a plurality of stator punching sheets, wherein each stator punching sheet is arranged in an axial lamination way.

The utility model also proposes an electric machine comprising a stator core as described above.

Optionally, the motor includes the stator core and a rotor that are mated, and a pole pair number p of the rotor is less than or equal to 5.

The utility model also proposes a compressor comprising a motor as described above.

The utility model also proposes a refrigeration device comprising a compressor as described above.

According to the technical scheme, the plurality of concave structures are arranged on the outer peripheral surface of the yoke part, wherein each concave structure is distributed at equal intervals along the axial circumferential direction of the yoke part and comprises the first concave part, the transition part and the second concave part which are connected, the first concave part and the second concave part are respectively arranged on the yoke parts corresponding to the two adjacent tooth parts, and the first concave part and the second concave part are respectively arranged on the central lines of the corresponding tooth parts, so that the electromagnetic field circulation of the yoke part of the stator punching sheet is ensured, the motor efficiency is improved, the structural rigidity of the stator punching sheet is ensured, and the manufacturing cost is reduced; the transition part is positioned between the yokes corresponding to the two adjacent teeth and is smaller than half of the outer diameter of the yoke, so that most of the outer peripheral surface of the yoke is reliably separated from the inner wall of the motor shell, on one hand, vibration transmitted to the shell can be reduced, the natural frequency of the shell is staggered from the working frequency of the motor during working, resonance is effectively avoided, noise is reduced, on the other hand, the magnetic circuit structure from the teeth to the yoke is optimized, the magnetic force acting force received by the shell is reduced, the reaction force received by a stator core formed by lamination of stator punching sheets is effectively reduced, the stability of the stator core during rotation is improved, the iron loss during motor operation is reduced, and the performance efficiency of the motor is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a stator lamination of the present utility model;

FIG. 2 is a schematic view of parameters of each portion of the stator lamination of FIG. 1;

FIG. 3 is a graph showing the noise contrast of the compressor of the present utility model at 60 rps;

fig. 4 is a graph showing the noise contrast of the compressor of the present utility model at 90 rps.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Yoke part	31	First concave part
20	Tooth part	32	Second concave part
				21	Stator groove	33	Transition portion
30	Concave structure

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a stator punching sheet.

Referring to fig. 1 to 4, in an embodiment of the present utility model, the stator lamination includes a yoke 10, a plurality of teeth 20, and a plurality of recess structures 30, the plurality of teeth 20 being provided on an inner circumferential surface of the yoke 10 and being arranged at intervals along a circumferential direction of the yoke 10; the plurality of concave structures 30 are arranged on the outer peripheral surface of the yoke 10, the concave structures 30 comprise a first concave part 31, a second concave part 32 and a transition part 33 connected between the first concave part 31 and the second concave part 32, the first concave part 31 and the second concave part 32 are respectively arranged on the yoke 10 corresponding to the adjacent two teeth 20, the first concave part 31 and the second concave part 32 are respectively arranged on the central line of the corresponding teeth 20, the transition part 33 is arranged between the yokes 10 corresponding to the adjacent two teeth 20, and the maximum distance between the transition part 33 and the circle center of the yoke 10 is smaller than half of the outer diameter of the yoke 10, so that the high-frequency carrier noise of the motor with the stator lamination is reduced by improving stator fixed frequency.

The compressor includes the motor, and the motor includes stator core, and stator core includes the stator towards piece that a plurality of stacks set up, and the stator towards piece can be the silicon steel sheet, and the stator towards piece includes yoke 10 and a plurality of tooth portion 20, and yoke 10 is cyclic annular structure, and wherein, the inner peripheral surface of yoke 10 is equipped with a plurality of tooth portions 20, and each tooth portion 20 is arranged along the circumference of yoke 10 evenly at intervals, and radially inwards extends along yoke 10, and the stator groove 21 that supplies the winding coil to place is defined between each adjacent tooth portion 20, and then is used for driving the rotor to rotate.

The outer peripheral surface of the yoke part 10 is provided with a plurality of concave structures 30, the concave structures 30 are distributed at equal intervals along the circumferential direction of the yoke part 10, and the openings of the concave structures are arranged far away from the tooth parts 20 so as to enlarge the gap between the yoke part 10 and the motor shell, wherein the concave structures 30 comprise a first concave part 31, a transition part 33 and a second concave part 32 which are connected, the first concave part 31 and the second concave part 32 are respectively arranged on the central line of the yoke part 10 corresponding to the two adjacent tooth parts 20, thereby ensuring the electromagnetic field circulation of the yoke part 10 of the stator punching sheet, improving the motor efficiency, ensuring the structural strength and the rigidity of the stator punching sheet and reducing the manufacturing cost; the transition portion 33 is located between the yokes 10 corresponding to the two adjacent teeth 20, and the maximum distance between the transition portion 33 and the center of the yoke 10 is smaller than half of the outer diameter of the yoke 10, in other words, the maximum distance between the transition portion 33 and the center of the yoke 10 is smaller than the radius of the outer ring of the yoke 10, so that most of the outer peripheral surface of the yoke 10 is reliably separated from the inner wall of the motor housing, on one hand, vibration transmitted to the housing can be further reduced, the natural frequency of the housing is staggered from the working frequency (stator fixed frequency) of the motor during operation, resonance is effectively avoided, noise is reduced, on the other hand, the magnetic circuit structure from the teeth 20 to the yoke 10 is optimized, and further, the reaction force exerted by the stator core formed by lamination of the stator lamination is effectively reduced through the reduction of the housing, the stability during rotation of the stator core is improved, the iron loss during operation of the motor is reduced, and the performance efficiency of the motor is improved. In addition, the increase of the clearance between stator core and the motor casing can also increase the circulation passageway for the refrigerant, is favorable to using the miniaturized of compressor that has this motor, and has higher refrigerating output, also is favorable to reducing the noise of compressor simultaneously.

According to the technical scheme of the utility model, the plurality of concave structures 30 are arranged on the outer peripheral surface of the yoke 10, wherein each concave structure 30 is uniformly distributed at intervals along the axial circumferential direction of the yoke 10 and comprises the first concave part 31, the transition part 33 and the second concave part 32 which are connected, the first concave part 31 and the second concave part 32 are respectively arranged on the yoke 10 corresponding to the two adjacent tooth parts 20, and the first concave part 31 and the second concave part 32 are respectively positioned on the central lines of the corresponding tooth parts 20, so that the electromagnetic field circulation of the yoke 10 of the stator punching sheet is ensured, the motor efficiency is improved, the structural rigidity of the stator punching sheet is ensured, and the manufacturing cost is reduced; the transition portion 33 is located between the yokes 10 corresponding to the two adjacent teeth 20, and the maximum distance between the transition portion and the center of the yokes 10 is smaller than half of the outer diameter of the yokes 10, so that most of the outer peripheral surface of the yokes 10 is reliably separated from the inner wall of the motor housing, on one hand, vibration transmitted to the housing can be reduced, the natural frequency of the housing is staggered from the working frequency of the motor during operation, resonance is effectively avoided, noise is reduced, on the other hand, the magnetic circuit structure from the teeth 20 to the yokes 10 is optimized, and further, the reaction force applied to the stator core formed by lamination of stator punching sheets is effectively reduced through reduction of the magnetic force applied to the housing, the stability of the stator core during rotation is improved, the iron loss during operation of the motor is reduced, and the performance efficiency of the motor is improved. And meanwhile, the service life of the motor is effectively prolonged.

Referring to fig. 1 to 2, in an embodiment, in a radial direction of the yoke 10, a relationship among a maximum distance Lmax between the transition portion 33 and a center of the yoke 10, an outer diameter D of the yoke 10, and a width b of the yoke 10 satisfies: the ratio of (D/2-Lmax)/b is more than or equal to 0.05 and less than or equal to 0.15. The units of the above dimensions are all mm.

Specifically, when (D/2-Lmax)/b is greater than 0.15mm, since the gap between the transition portion 33 and the motor housing is excessively large, the width of the yoke portion 10 is excessively small, resulting in saturation of the magnetic circuit structure from the tooth portion 20 to the yoke portion 10, lowering of the magnetic flux, lowering of the structural strength in the radial direction of the yoke portion 10, and further lowering of the performance efficiency of the motor; when (D/2-Lmax)/b is smaller than 0.05mm, since the gap between the transition portion 33 and the motor housing is too small, the maximum distance between the transition portion and the center of the yoke portion 10 is similar to the outer diameter of the yoke portion 10, at this time, the yoke portion 10 and the motor housing cannot be separated well, so that vibration transmitted to the housing cannot be reduced effectively, resonance is avoided, larger noise is generated, the service life of the motor is shortened, performance efficiency of the motor is reduced, and use experience of a user is reduced. Therefore, the relationship between the maximum distance from the transition portion 33 to the center of the yoke 10, the outer diameter of the yoke 10, and the width of the yoke 10 is set to be between 0.05mm and 0.15mm, so that most of the outer circumferential surface of the yoke 10 is reliably separated from the inner wall of the motor housing, and vibration transmitted to the housing can be reduced, resonance is effectively avoided, noise is reduced, and meanwhile, the magnetic circuit structure from the tooth portion 20 to the yoke 10 is optimized, the stability of the stator core during rotation is improved, the iron loss during motor operation is reduced, and the performance efficiency of the motor is improved. And meanwhile, the service life of the motor is effectively prolonged. The relationship between the maximum distance between the transition portion 33 and the center of the yoke portion 10, the outer diameter of the yoke portion 10, and the width b of the yoke portion 10 may be specifically selected from 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, and 0.15mm.

Referring to fig. 1 to 2, in an embodiment, the transition portion 33 has a straight line structure in a section perpendicular to a central axis of the yoke portion 10; or, the transition portion 33 is of an arc structure, so that gaps are reserved between the transition portion 33 and the motor shell, the outer peripheral surface of the part of the yoke portion 10 and the inner wall surface of the shell are effectively separated, resonance is effectively avoided, noise is reduced, meanwhile, stability of the motor in running is improved, iron loss of the motor in running is reduced, and performance efficiency of the motor is improved. And meanwhile, the service life of the motor is effectively prolonged.

Optionally, in an embodiment, in a section perpendicular to the central axis of the yoke 10, the bottom wall of the first recess 31 and/or the bottom wall of the second recess 32 are in a straight line structure; and/or, the bottom wall of the first concave portion 31 and/or the bottom wall of the second concave portion 32 are in an arc structure, it is understood that the bottom wall of the first concave portion 31 and the bottom wall of the second concave portion 32 may both be in a planar structure, or the bottom wall of the first concave portion 31 and the bottom wall of the second concave portion 32 may both be in an arc structure; alternatively, the bottom wall of the first concave portion 31 has a planar structure, and the bottom wall of the second concave portion 32 has an arc structure; alternatively, the bottom wall of the first recess 31 may have an arcuate structure, the bottom wall of the second recess 32 may have a planar structure, and the specific configuration may be freely set as required to meet the requirements such as the magnetic circuit structure from the tooth portion 20 to the yoke portion 10, the performance efficiency of the motor, and the like, and is not limited thereto.

Optionally, in an embodiment, the grooves formed between two adjacent teeth 20 are stator grooves 21, the number of the stator grooves 21 is Q, and the number of the concave structures 30 is k, where k is greater than or equal to 3 and less than Q/2. Specifically, when the number of the concave structures 30 is less than 3, most of the outer peripheral surfaces of the yokes 10 are connected with the motor housing, the vibration transmitted to the housing is larger, the natural frequency of the housing cannot be staggered from the working frequency of the motor during working, and the gaps between the yokes 10 and the housing are smaller, so that resonance is easy to occur, the heat dissipation effect is poor, the noise is increased, the service life of the motor is shortened, the performance efficiency of the motor is reduced, and the use experience of a user is reduced; when the quantity of the concave structures 30 is greater than half of the quantity of the stator slots 21, the structural stability of the stator punching sheet is easily affected, the stability of the motor during operation is further affected, the performance efficiency of the motor is reduced, the noise is increased, and the use experience of a user is reduced. Therefore, the number of the concave structures 30 is set between 3 and Q/2, so that most of the outer peripheral surface of the yoke 10 can be reliably separated from the inner wall of the motor housing, and vibration transmitted to the housing can be reduced, resonance can be effectively avoided, noise is reduced, meanwhile, the magnetic circuit structure from the tooth portion 20 to the yoke 10 is optimized, the stability of the stator core during rotation is improved, the iron loss of the motor during operation is reduced, and the performance efficiency of the motor is improved. When Q is 12, the number of the concave structures 30 may be 3, 4, 5, or 6. The number of the recess structures 30 on the stator lamination shown in fig. 1 is 4.

Specifically, in one embodiment, k is equal to 4, that is, the number of the concave structures 30 on the stator lamination is 4, and the 4 concave structures 30 are distributed along the outer peripheral surface of the yoke 10, so that most of the outer peripheral surface of the yoke 10 is reliably separated from the inner wall of the motor housing, thereby being beneficial to improving the performance efficiency of the motor.

Alternatively, in an embodiment, the number Q of stator slots 21 satisfies: q is less than or equal to 12; the number of stator slots 21 can be selected according to practical needs. Specifically, Q is equal to 12.

The utility model also provides a stator core, which comprises a plurality of stator punching sheets, and the specific structure of the stator punching sheets refers to the embodiment, and as the stator core adopts all the technical schemes of all the embodiments, the stator core at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. Wherein, each stator punching sheet is arranged in an axial lamination way.

The utility model also provides a motor, which comprises a stator core, wherein the specific structure of the stator core refers to the embodiment, and the motor adopts all the technical schemes of all the embodiments, so that the motor has at least all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated here.

Specifically, the motor comprises a stator core and a rotor which are matched, wherein the pole pair number p of the rotor is less than or equal to 5, namely the pole numbers can be 4, 6 and 8. When the stator slot number Q is 12, the motor is a 12 slot 8 pole motor.

The utility model also provides a compressor, which comprises a motor, wherein the specific structure of the motor refers to the embodiment, and as the compressor adopts all the technical schemes of all the embodiments, the compressor at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. According to the definition of relevant parameters of stator punching sheets in a motor, the noise pair of the compressor and a comparison model is shown in a figure 3 at 60rps, and the noise pair of the compressor and the comparison model is shown in a figure 4 at 90rps, so that the performance of the compressor is obviously superior to that of the comparison model.

The utility model also provides a refrigeration device which comprises a compressor, wherein the specific structure of the compressor refers to the embodiment, and as the refrigeration device adopts all the technical schemes of all the embodiments, the refrigeration device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (12)

1. A stator lamination, comprising:

a yoke;

a plurality of teeth arranged on the inner peripheral surface of the yoke at intervals along the circumferential direction of the yoke; and

the plurality of concave structures are arranged on the outer peripheral surface of the yoke part, each concave structure comprises a first concave part, a second concave part and a transition part connected between the first concave part and the second concave part, the first concave part and the second concave part are respectively arranged on the yoke parts corresponding to the adjacent two tooth parts, the first concave part and the second concave part are respectively arranged on the central lines of the corresponding tooth parts, the transition part is arranged between the yoke parts corresponding to the adjacent two tooth parts, and the maximum distance between the transition part and the circle center of the yoke part is smaller than half of the outer diameter of the yoke part.

2. The stator lamination as defined in claim 1, wherein, in a radial direction of the yoke, a relationship among a maximum distance Lmax between the transition portion and a center of the yoke, an outer diameter D of the yoke, and a width b of the yoke satisfies: the ratio of (D/2-Lmax)/b is more than or equal to 0.05 and less than or equal to 0.15.

3. The stator plate of claim 1, wherein the transition portion has a straight line structure or an arc structure in a section perpendicular to a central axis of the yoke portion;

and/or the bottom wall of the first concave part and/or the bottom wall of the second concave part are in a linear structure;

and/or the bottom wall of the first concave part and/or the bottom wall of the second concave part is in an arc structure.

4. The stator punching of claim 1, wherein the grooves formed between two adjacent teeth are stator grooves, the number of the stator grooves is Q, and k concave structures are provided, wherein k is greater than or equal to 3 and less than Q/2.

5. The stator plate of claim 4 wherein k is equal to 4.

6. The stator core of claim 4 wherein the number Q of stator slots satisfies: q is less than or equal to 12.

7. The stator plate of claim 6 wherein Q is equal to 12.

8. A stator core comprising a plurality of stator laminations as claimed in any one of claims 1 to 7, each of said stator laminations being arranged in axial compression.

9. An electric machine comprising the stator core of claim 8.

10. The electric machine of claim 9, wherein the electric machine comprises the stator core and a rotor mated, the rotor having a pole pair number p of less than or equal to 5.

11. A compressor comprising an electric machine as claimed in any one of claims 9 to 10.

12. A refrigeration apparatus comprising the compressor of claim 11.