CN219918513U - Stator punching sheet, stator core with same, motor, compressor and refrigeration equipment - Google Patents

Abstract

The utility model discloses a stator punching sheet, a stator core with the same, a motor, a compressor and refrigeration equipment. The stator punching sheet comprises a stator yoke part and a plurality of stator tooth parts, wherein the plurality of stator tooth parts are distributed at intervals in the circumferential direction of the inner side of the stator yoke part, the stator tooth parts extend inwards along the radial direction of the stator yoke part, the outer contour of the stator yoke part comprises a plurality of arc sections in a plane perpendicular to the axis of the stator punching sheet, the plurality of arc sections are distributed on the same circumference, two adjacent arc sections are connected through a transition section, the transition section is a smooth curve section, the diameter of the circumference is D, two ends of the transition section are connected with the arc sections, the distance from other points except for the two ends of the transition section to the center of the circumference is X, and the X and the D meet the following conditions: x is less than D/2, the central angle of each arc section is theta, and the theta satisfies the following conditions: theta is more than or equal to 9 degrees and less than 90 degrees. According to the stator punching sheet provided by the utility model, the stator punching sheet frequency fixing is improved, and the noise generated under high-frequency carrier waves is reduced.

Description

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

Technical Field

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

Background

The motor of the existing household air conditioner compressor 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 stator punching sheet is improperly designed, noise and vibration of a frequency band near a carrier wave of a motor and a compressor can be deteriorated, the hearing feeling of a user is seriously affected, and meanwhile, the service life of a product is directly affected by the deterioration of the vibration.

Disclosure of Invention

The present utility model aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the stator punching sheet provided by the utility model improves the stator punching sheet frequency fixing and reduces the noise generated under high-frequency carrier waves.

The utility model also provides a stator core with the stator punching sheet.

The utility model further provides a motor with the stator core.

The utility model also provides a compressor with the motor.

The utility model also provides the refrigerating equipment with the compressor.

The stator punching sheet according to the embodiment of the utility model comprises: the stator teeth are distributed at intervals in the circumferential direction on the inner side of the stator yoke, the stator teeth extend inwards in the radial direction of the stator yoke, the outer profile of the stator yoke comprises a plurality of arc sections in a plane perpendicular to the axis of the stator punching sheet, the arc sections are distributed on the same circumference, two adjacent arc sections are connected through a transition section, the transition section is a smooth curve section, the diameter of the circumference is D, two ends of the transition section are connected with the arc sections, and the distance from other points except the two ends of the transition section to the center of the circumference is X, and X and D are as follows: x is less than D/2, the central angle of each arc section is theta, and the theta satisfies the following conditions: theta is more than or equal to 9 degrees and less than 90 degrees.

According to the stator punching sheet provided by the embodiment of the utility model, the stator punching sheet comprises the stator yoke part and the plurality of stator tooth parts, the outer surface of the stator yoke part comprises the plurality of circular arc sections, and two adjacent circular arc sections are connected through the transition section, so that the stator punching sheet frequency fixing is improved, and the high-frequency carrier noise is reduced.

According to some embodiments of the utility model, a stator groove is formed between two adjacent stator teeth, the number of the stator grooves is Q, and Q satisfies: q is less than or equal to 12.

According to some embodiments of the utility model, the number of arc segments is k, k and Q satisfy: k is more than or equal to 4 and less than Q/2.

According to some embodiments of the utility model, the circular arc segments are disposed radially outward of the stator slots.

According to some embodiments of the utility model, the arcuate segments are disposed radially outward of the stator teeth.

According to some embodiments of the utility model, the plurality of transition sections are identical in structure.

According to some embodiments of the utility model, at least two of the transition sections differ in structure.

According to another embodiment of the present utility model, a stator core includes a plurality of the stator laminations described above, and a plurality of the stator laminations are stacked in sequence.

The stator core improves stator fixed frequency and reduces high-frequency carrier noise.

An electric machine according to an embodiment of the present utility model includes a rotor having a pole pair number of not more than 5, and the stator core described above.

The motor improves stator fixed frequency and reduces high-frequency carrier noise.

A compressor according to an embodiment of a further aspect of the present utility model includes the above-described motor.

The compressor improves stator fixed frequency and reduces high-frequency carrier noise.

A refrigeration appliance according to an embodiment of a further aspect of the present utility model includes a compressor as described above.

The refrigerating equipment improves stator fixed frequency and reduces high-frequency carrier noise.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic illustration of a stator lamination in accordance with an embodiment of the utility model;

FIG. 2 is a schematic illustration of the central angle of a circular arc segment in a stator lamination according to an embodiment of the utility model;

FIG. 3 is a graph of the noise effect of a compressor according to an embodiment of the present utility model at a high frequency carrier of 60rps with a prior art compressor;

fig. 4 is a diagram showing the noise effect of a compressor according to an embodiment of the present utility model at 90rps high frequency carrier with a conventional compressor.

Reference numerals: stator lamination 100, stator yoke 10, circular arc segment 11, transition segment 12, first curve segment 121, second curve segment 122, stator tooth 20, and stator slot 30.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are 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 one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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.

A stator core, a motor, a compressor, and a refrigerating apparatus according to an embodiment of the present utility model are described in detail with reference to fig. 1 to 4.

Referring to fig. 1 and 2, a stator lamination 100 according to an embodiment of the present utility model may include a stator yoke 10 and a plurality of stator teeth 20. Wherein a plurality of stator teeth 20 are spaced apart in a circumferential direction inside the stator yoke 10, and the stator teeth 20 extend inward in a radial direction of the stator yoke 10. Alternatively, the radially outer end of the stator tooth 20 is connected to the inner peripheral edge of the stator yoke 10, and the radially inner end of the stator tooth 20 is disposed to extend toward the center of the stator yoke 10. In a plane perpendicular to the axis of the stator lamination, the outer contour of the stator yoke 10 comprises a plurality of arc segments 11, the arc segments 11 are distributed and arranged on the same circumference, two adjacent arc segments 11 are connected through a transition segment 12, and the transition segment 12 is a smooth curve segment. Alternatively, the circular arc sections 11 are connected by smooth curve sections, so that the service life of the stator punching sheet 100 punching die can be prolonged, in addition, the smooth curve sections also relieve the deformation of the stator punching sheet 100, and the stress concentration phenomenon during the punching of the stator punching sheet 100 can be eliminated.

The diameter of the circumference is D and the distance from the point on the transition section 12 to the center of the circumference is X, X and D satisfy the relationship: x is less than D/2. Therefore, the transition section 12 is not located on the circumference of the circular arc section 11, two ends of the transition section 12 are connected with the circular arc section 11, the distance X from the rest points except the two ends of the transition section 12 to the center of the circumference is limited to be X < D/2, the structure of the stator yoke 10 is optimized, the tooth magnetic density and the yoke magnetic density of the stator punching sheet 100 tend to be balanced, the fixed frequency of the stator punching sheet 100 is improved, noise generated under high-frequency carrier waves is reduced, and the service life of the stator punching sheet 100 is prolonged. At the same time, the amount of material used can be reduced, and the weight of the stator lamination 100 can be reduced.

In actual products, the stator plate 100 has a certain thickness, and thus, in the axial direction of the stator plate 100, the circular arc section 11 is configured as a circular arc surface, the transition section 12 is configured as a transition surface, and the circumference is configured as a cylindrical surface. The stator punching sheet 100 according to the embodiment of the utility model comprises a stator yoke 10 and a plurality of stator teeth 20, wherein the outer contour of the stator yoke 10 comprises a plurality of arc sections 11, and two adjacent arc sections 11 are connected through a transition section 12, so that the frequency fixing of the stator punching sheet 100 is improved, and the noise generated under high-frequency carrier waves is reduced.

In some embodiments of the present utility model, referring to fig. 2, the central angle of each arc segment 11 is θ, which satisfies the relationship: theta is more than or equal to 9 degrees and less than 90 degrees. Alternatively, θ may be 9 °, 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 70 °, 80 °, 89 °, etc., although θ may be other values between 9 ° and 90 °, which are not listed here.

In some embodiments of the present utility model, referring to fig. 1, a stator slot 30 is formed between two adjacent stator teeth 20, and the number of slots of the stator slot 30 is Q, where Q satisfies the relationship: q is less than or equal to 12. Alternatively, q=1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, the number of stator teeth 20 is equal to the number of stator grooves 30. The greater the number of stator slots 30, the greater the number of stator teeth 20, which is more advantageous for reducing the fixed frequency of the electronic die, thereby reducing noise generated under high frequency carriers.

In some embodiments of the utility model, the number of arc segments 11 is k, k and Q satisfying the relationship: k is more than or equal to 4 and less than Q/2. Optionally, when q=12, the value of 4.ltoreq.k < 6,k is 4 or 5; similarly, when q=10, 4.ltoreq.k < 5, and k has a value of 4. As shown in fig. 1, the stator yoke 10 includes 4 circular arc segments 11, and the 4 circular arc segments 11 are uniformly distributed along the circumference. In some embodiments of the utility model, not shown, the stator yoke 10 comprises 5 circular arc segments 11.

In some embodiments of the utility model, referring to fig. 1, the circular arc segments 11 are disposed radially outward of the stator slots 30. Optionally, the center line of the circular arc segment 11 is aligned with the center line of the stator slot 30. In some embodiments, the center line of the circular arc segment 11 is offset from the center line of the stator slot 30.

In some embodiments of the present utility model, referring to fig. 1, the circular arc segment 11 is disposed radially outward of the stator tooth 20. Optionally, the center line of the circular arc segment 11 is aligned with the center line of the stator tooth 20. In some embodiments, the centerline of the circular segment 11 is separated from the centerline of the stator tooth 20.

It will be understood that the "center line of the circular arc segment 11" in the embodiment of the present utility model refers to the symmetrical center line of the circular arc segment 11 in the plane perpendicular to the axis of the stator plate 100, the "center line of the stator slot 30" refers to the symmetrical center line of the stator slot 30 in the plane perpendicular to the axis of the stator plate 100, and the "center line of the stator tooth 20" refers to the symmetrical center line of the stator tooth 20 in the plane perpendicular to the axis of the stator plate 100. As shown in fig. 1, the center line of the circular arc segment 11 is L1, the center line of the stator groove 30 is L2, and the center line of the stator tooth 20 is L3.

In some embodiments of the present utility model, the plurality of transition sections 12 are identical in structure. Alternatively, the transition sections 12 may be curved sections of identical shape, and the centers of the curved sections may be located inside or outside the circumference.

In some embodiments of the present utility model, as shown with reference to FIG. 1, at least two transition sections 12 differ in structure. Alternatively, the degree of curvature of adjacent transition sections 12 may be different, as may the length of the transition sections.

In some embodiments of the present utility model, referring to fig. 1, the smooth curve segment includes a first curve segment 121 and a second curve segment 122, where the first curve segment 121 is connected to the second curve segment 122, and the concave-convex directions of the first curve segment 121 and the second curve segment 122 are different, for example, the first curve segment 121 is concave with respect to the center of the circumference, and the second curve segment 122 is convex, but the first curve segment 121 and the second curve segment 122 are still located inside the circumference, so as to further improve fixing of the stator punching sheet, and reduce noise generated on the high-frequency carrier wave. The number of the first curve segments 121 of each transition segment 12 may be one or a plurality; the number of second curve segments 122 per transition segment 12 may be one or more.

One specific embodiment of a stator lamination 100 in accordance with an embodiment of the present utility model is provided below.

The stator lamination 100 includes a stator yoke 10 and 12 stator teeth 20, the 12 stator teeth 20 being spaced apart in a circumferential direction inside the stator yoke 10, and the stator teeth 20 extending radially inward of the stator yoke 10. The outer contour of the stator yoke 10 comprises 4 arc sections 11, the 4 arc sections 11 are distributed on the same circumference, two adjacent arc sections 11 are connected through a transition section 12, and the transition section 12 is a smooth curve section. The diameter of the circumference is D and the distance from the point on the transition section 12 to the center of the circumference is X, X and D satisfy the relationship: x is less than D/2.

The central angle θ=20° of the circular arc segment 11 forms stator grooves 30 between two adjacent stator teeth 20, the number Q of the stator grooves 30 is equal to the number of the stator teeth 20, and the number q=12 of the stator grooves 30. The arc segment 11 is disposed radially outside the stator slot 30, and the center line of the arc segment 11 is offset from the center line of the stator slot 30, and the center line of the arc segment 11 is separated from the center line of the stator tooth 20.

Each transition section 12 comprises a first curve section 121 and a second curve section 122, the first curve section 121 being connected to the second curve section 122, the first curve section 121 being concave with respect to the centre of the circumference, the second curve section 122 being convex, the first curve section 121 and the second curve section 122 being located inside the circumference. The number of first curve segments 121 of each transition segment 12 is 3; the number of second curve segments 122 per transition segment 12 is 2.

A stator core according to another embodiment of the present utility model includes a plurality of the stator laminations 100 described above, and the plurality of stator laminations 100 are stacked in sequence. Optionally, the stator core further includes a winding including a plurality of coils, and each coil is wound on the stator teeth 20 of the stator core 100, thereby facilitating reduction of copper loss, modular production, and improvement of production and manufacturing efficiency. In practical design, the stator yokes 10 of two adjacent stator laminations 100 in the plurality of stator laminations 100 are detachably connected, for example, an inserting structure is arranged on the opposite surfaces of the two stator yokes 10, namely, inserting convex columns are arranged on the surface of one stator yoke 10, inserting grooves are arranged on the surface of the other stator yoke 10, and the inserting convex columns are inserted into the inserting grooves, so that the inserting fit of the adjacent stator yokes 10 is realized, and flexible disassembly and installation are facilitated. The stator core of the embodiment of the utility model improves stator fixed frequency and reduces noise generated on high-frequency carrier waves.

An electric machine according to an embodiment of the present utility model includes a rotor having a pole pair number of not more than 5 and the stator core described above. Alternatively, the pole pairs of the rotor may be 1 pair, 2 pair, 3 pair, 4 pair, 5 pair. Optionally, the stator core is sleeved outside the rotor, the rotor comprises a magnetic ring and a rotating shaft, the magnetic ring is fixedly sleeved outside the rotating shaft, and the magnetic ring can be fixedly connected with the rotating shaft along the circumferential direction, so that the magnetic ring and the rotating shaft rotate together relative to the stator core. The motor of the embodiment of the utility model improves stator fixed frequency and reduces high-frequency carrier noise.

A compressor according to an embodiment of a further aspect of the present utility model includes the above-described motor. As shown in fig. 3 and 4, the compressor according to the embodiment of the present utility model generates lower noise at high frequency carriers of 60rps and 90rps than the conventional compressor. The compressor of the embodiment of the utility model improves stator fixed frequency and reduces noise generated under high-frequency carrier waves.

A refrigeration appliance according to an embodiment of a further aspect of the present utility model includes a compressor as described above. The refrigerating equipment provided by the embodiment of the utility model improves the stator fixed frequency and reduces the noise generated under high-frequency carrier waves.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (11)

1. A stator lamination, comprising: stator yoke (10) and a plurality of stator tooth portion (20), a plurality of stator tooth portion (20) are in the circumference of stator yoke (10) inboard is the circumference interval distribution, and stator tooth portion (20) are followed the radial inwards extension of stator yoke (10), in the plane perpendicular to stator punching axis, the outline of stator yoke (10) includes a plurality of circular arc sections (11), a plurality of circular arc sections (11) disperse arrangement is on same circumference, adjacent two between circular arc sections (11) are connected through changeover portion (12), changeover portion (12) are smooth curve section, the diameter of circumference is D, changeover portion (12) both ends with circular arc section (11) are connected, the distance of other points except for both ends on changeover portion (12) to the center of circumference is X, X and D satisfy: x is less than D/2, the central angle of each arc section (11) is theta, and the theta satisfies the following conditions: theta is more than or equal to 9 degrees and less than 90 degrees.

2. Stator punching sheet according to claim 1, characterized in that a stator slot (30) is formed between two adjacent stator teeth (20), the number of slots of the stator slot (30) being Q, Q satisfying: q is less than or equal to 12.

3. Stator punching sheet according to claim 2, characterized in that the number of circular arc segments (11) is k, k and Q satisfying: k is more than or equal to 4 and less than Q/2.

4. Stator punching according to claim 2, characterized in that the circular arc segments (11) are arranged radially outside the stator slots (30).

5. Stator punching according to claim 1, characterized in that the circular arc segments (11) are arranged radially outside the stator teeth (20).

6. Stator punching according to claim 1, characterized in that the plurality of transition sections (12) are of identical construction.

7. Stator punching according to claim 1, characterized in that at least two of the transition sections (12) differ in structure.

8. A stator core comprising a plurality of stator laminations according to any one of claims 1-7, the plurality of stator laminations being stacked in sequence.

9. An electric machine comprising a rotor and the stator core of claim 8, the rotor having a pole pair number of no more than 5.

10. A compressor comprising the motor of claim 9.

11. A refrigeration apparatus comprising the compressor of claim 10.