CN210957931U - Permanent magnet motor stator core, permanent magnet motor and compressor - Google Patents
Permanent magnet motor stator core, permanent magnet motor and compressor Download PDFInfo
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- CN210957931U CN210957931U CN201922229439.2U CN201922229439U CN210957931U CN 210957931 U CN210957931 U CN 210957931U CN 201922229439 U CN201922229439 U CN 201922229439U CN 210957931 U CN210957931 U CN 210957931U
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Abstract
The utility model provides a permanent-magnet machine stator core, permanent-magnet machine and compressor, stator core is formed by a plurality of stator lamination stacks, stator lamination includes a towards piece body, have a plurality of along towards piece body circumference evenly distributed's stator groove on the piece body, the stator groove with between the outer profile surface of piece body and be close to one side of the outer profile surface of piece body is equipped with the through-hole, with the through-hole be located same circumferencial direction and be equipped with first riveting point in at least one side of through-hole, each stator lamination after the stack passes through first riveting point riveting connection, forms stator core; the utility model discloses under the prerequisite that does not influence motor efficiency, improved the rigidity intensity of permanent-magnet machine stator core excircle department.
Description
Technical Field
The utility model relates to a compressor technical field, specifically speaking relates to a permanent-magnet machine stator core, permanent-magnet machine and compressor.
Background
As shown in fig. 1, a stator core of a permanent magnet motor is formed by laminating a plurality of stator laminations 100, in general, a riveting point 102 is provided between an outer contour surface of a stator lamination and a stator slot 101 in the stator lamination 100 in the prior art, so that the laminated stator laminations 100 are riveted to form the stator core. However, the through hole 201 is usually provided at a position close to the outer contour surface of the stator lamination 100 for refrigerant circulation and oil return improvement, and the rivet point 102 is usually provided between the through hole 201 and the stator slot 101, which tends to cause insufficient rigidity strength at the outer circle of the stator core after the stator lamination 100 is riveted.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a permanent-magnet machine stator core, permanent-magnet machine and compressor improves the rigidity intensity of permanent-magnet machine stator core excircle department.
According to the utility model discloses an aspect provides a permanent-magnet machine stator core, stator core is by a plurality of stator towards the range upon range of formation of piece, the stator is towards the piece including one towards the piece body, towards having a plurality of edges on the piece body towards the stator groove towards piece body circumference evenly distributed, the stator groove with towards between the outer profile face of piece body and being close to one side towards the outer profile face of piece body is equipped with the through-hole, with the through-hole is located same circumferencial direction and is in at least one side of through-hole is equipped with first riveting point, each after the range upon range of the stator is towards the piece and passes through first riveting point riveting connection forms stator core.
Preferably, the outer contour surface of the punching sheet body is provided with a plurality of sections of straight lines distributed at intervals, the positions of the first riveting points correspond to the positions of the straight lines, and the extension directions of the first riveting points are parallel to the extension direction of the straight lines.
Preferably, the punching sheet body is provided with an annular yoke portion, a plurality of teeth portions extending from the inner periphery of the annular yoke portion along the radial direction of the annular yoke portion, and arc salient poles extending from the outer periphery of the annular yoke portion along the radial direction of the annular yoke portion, the stator slots are formed between every two adjacent teeth portions, an inward concave groove is formed between every two adjacent arc salient poles, and the arc salient poles and the grooves are smoothly connected through the straight lines.
Preferably, on a plane where the punching sheet body is located, a minimum distance between the stator slot and the straight line is a, a minimum distance between the arc salient pole and the stator slot is b, a maximum width of the through hole along a first direction is c, and a maximum width of the first riveting point along a second direction is d; the first direction is towards the direction perpendicular with through-hole extending direction on the plane of piece body place, the second direction is towards the direction perpendicular with first riveting point extending direction on the plane of piece body place, then a, b, c and d satisfy: 0.8 is less than or equal to [ (a-d)/(b-c) ] < 1.2.
Preferably, the number of the stator slots is N, the number of the first rivet joints is N, and N satisfy N-2N.
Preferably, the number of the stator slots is N, and the number of the first riveting points is N, then N and N satisfy N < 2N.
Preferably, a second riveting point is arranged in the tooth part, and the stator punching sheets are further riveted and connected through the second riveting point.
Preferably, each of the stator slots is symmetrical about a first center line of symmetry, each of the through holes is symmetrical about a second center line of symmetry, and the first center line of symmetry and the second center line of symmetry coincide.
According to another aspect of the present invention, there is provided a permanent magnet motor, comprising a stator, wherein the stator comprises the above-mentioned stator core of the permanent magnet motor.
According to another aspect of the present invention, there is provided a compressor, which includes the above-mentioned permanent magnet motor. Compared with the prior art, the utility model beneficial effect lie in:
the utility model provides a permanent-magnet machine stator core, permanent-magnet machine and compressor are through setting up the first riveting point on the stator punching at the at least one side of through-hole and in the position that is close to the through-hole, and this has both made the stator more even towards the magnetic circuit on the piece, has reduced the influence of riveting point pair magnetic circuit magnetic resistance, has also strengthened the rigidity intensity of the excircle department of the stator core that forms after the riveting, avoids the problem of rocking that probably produces at compressor operation in-process stator.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a stator lamination of a stator core in the prior art;
fig. 2 is a schematic structural diagram of a stator punching sheet in a permanent magnet motor stator core disclosed in an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
fig. 4 is a schematic structural diagram of a stator punching sheet in a stator core of a permanent magnet motor according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, materials, devices, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "having," and "providing" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
As shown in fig. 2, the first embodiment of the present invention discloses a permanent magnet motor stator core, which is formed by stacking a plurality of stator laminations, wherein each stator lamination includes a lamination body 200, and the lamination body 200 is provided with a plurality of stator slots 101 uniformly distributed along the circumferential direction of the lamination body 200, specifically, the lamination body 200 has an annular yoke portion 203, a plurality of tooth portions 204 extending from the inner circumference of the annular yoke portion 203 along the radial direction of the annular yoke portion 203 inward, and a plurality of arc salient poles 205 extending from the outer circumference of the annular yoke portion 203 along the radial direction of the annular yoke portion 203 outward; the stator slot 101 is formed between two adjacent teeth 204, the arc salient poles 205 are arcs on the outer contour surface of the lamination body 200, and the arc salient poles 205 are arranged at equal intervals along the circumferential direction of the annular yoke 203.
A groove 206 which is concave inwards relative to the outer contour surface of the punching sheet body 200 is formed between two adjacent sections of the arc salient poles 205, the arc salient poles 205 and the groove 206 are smoothly connected through straight lines 207, the straight lines 207 are distributed at intervals along the outer contour surface of the punching sheet body 200, through holes 201 are formed between the stator slot 101 and the outer contour surface of the punching sheet body 200 and on one side close to the outer contour surface of the punching sheet body 200, namely through holes 201 are formed between the stator slot 101 and the arc salient poles 205 and on the position close to the arc salient poles 205, and the through holes 201 are used for circulating a refrigerant, improving oil return, dissipating heat and the like.
In this embodiment, the through hole 201 is a kidney-shaped hole, but the present invention does not limit the shape of the through hole 201. Each stator slot 101 is itself symmetrical about a first centre line of symmetry, and each through hole 201 is itself symmetrical about a second centre line of symmetry, which first and second centre lines of symmetry coincide.
As shown in fig. 1, in a stator lamination in a permanent magnet motor stator core in the prior art, a rivet point 102 is arranged between a through hole 201 and a stator slot 101, that is, on the radial inner side of the through hole 201, and the laminated stator laminations are riveted and fixed by the rivet point 102, so that the rigidity and the strength of the outer circle of the stator core are insufficient in the operation process of a compressor, and the riveted stator core may shake.
Therefore, as the solution of replacing the riveting point setting position in the prior art, the utility model discloses set up first riveting point 202 in the position that is located same circumferencial direction, is located at least one side of through-hole 201 and is close to through-hole 201 with through-hole 201. Specifically, in the present embodiment, first rivet points 202 are respectively provided at both sides of the through hole 201 in the same circumferential direction as the through hole 201, and the stacked stator laminations are riveted and connected by the first rivet points 202 to form the stator core. In this embodiment, the circumference of the through hole 201 passes through the middle point of the line segment at the two ends of the first rivet point 202, the position of the first rivet point 202 corresponds to the position of the straight line 207, the extending direction of the first rivet point 202 is parallel to the extending direction of the straight line 207, that is, the first rivet point 202 is located on the same circumference as the through hole 201 and close to the through hole 201, the projection of the first rivet point 202 on the outer contour surface of the rotor sheet 200 coincides with the projection of the straight line 207 on the outer contour surface of the rotor sheet 200, and the projection of the straight line 207 on the outer contour surface of the rotor sheet 200 includes the projection of the first rivet point 202 on the outer contour surface of the rotor sheet 200, which is beneficial to reducing the influence of the first rivet point 202 on the magnetic circuit reluctance and improving the efficiency of the motor.
In this embodiment, the straight line 207 is a segment of straight line, and the first riveting point 202 is a bar shape, which is not limited by the present invention. Through setting up first riveting point 202 in the position that corresponds with above-mentioned straight line 207 of through-hole 201 both sides, improved the intensity of compressor operation in-process stator core excircle department, avoided the rocking problem that stator core produced.
In this embodiment, if the number of the stator slots 101 is N and the number of the first caulking points 202 is N, N and N satisfy N equal to 2N.
As a preferred embodiment of the present application, n is an even number.
As a preferred embodiment of the present application, N and N satisfy N < 2N.
As a preferred embodiment of the present application, the n first riveting points 202 are divided into a preset number of groups, the number of the first riveting points 202 in each group is the same, the first riveting points 202 in each group are continuously distributed in the circumferential direction of the stamping sheet body 200, and the first riveting points 202 in the preset number of groups are symmetrically distributed about the central point of the stamping sheet body 200. For example, 12 first riveting points 202 are distributed on the punching sheet body 200, the 12 first riveting points 202 are divided into 3 groups, each group includes 4 first riveting points 202, and the 4 first riveting points 202 in each group are continuously distributed in the circumferential direction of the punching sheet body 200, so that the 3 groups of first riveting points 202 are symmetrically distributed about the central point of the punching sheet body 200.
Fig. 3 is an enlarged schematic view of a partial area a in fig. 2, and during operation of the compressor, the direction of the magnetic path inside the stator core generally enters from one tooth portion 204, then passes through the annular yoke portion 203, and then exits from the other tooth portion 204, and since the arrangement of the first rivet point 202 may cause a significant increase in local magnetic resistance, which may cause a decrease in motor efficiency, the size and position arrangement of the first rivet point 202 in this embodiment need to satisfy specific conditions. As shown in fig. 3, on the plane of the punching sheet body 200, the minimum distance between the stator slot 101 and the straight line 207 is a, the minimum distance between the arc salient pole 205 and the stator slot 101 is b, the maximum width of the through hole 201 along the first direction is c, and the maximum width of the first rivet point 202 along the second direction is d; the first direction is a direction perpendicular to the extending direction of the through hole 201 on the plane where the stamped sheet body 200 is located, and the second direction is a direction perpendicular to the extending direction of the first riveting point 202 on the plane where the stamped sheet body 200 is located, so as to ensure that the arrangement of the first riveting point 202 does not affect the local magnetic resistance, a, b, c and d in the embodiment satisfy: 0.8 is less than or equal to [ (a-d)/(b-c) ] < 1.2.
Exemplarily, as shown in fig. 2, the punching sheet body 200 in the present embodiment has 9 stator slots 101 and 9 through holes 201, two sides of each through hole 201 are provided with one first riveting point 202, a total of 18 first riveting points 202 are provided, and a, b, c, and d satisfy: (a-d)/(b-c) ═ 0.98, this makes the stator core who contains this towards piece body 200 have even magnetic circuit, has reduced the influence of the setting of first riveting point 202 to the magnetic circuit to the excircle department intensity of stator core has been improved.
Example two
As shown in fig. 4, this embodiment discloses a permanent magnet motor stator core based on the first embodiment, the stator core is formed by stacking a plurality of stator laminations, each stator lamination includes a lamination body 300, a second rivet point 208 is disposed between two adjacent stator slots 101 of the lamination body 300, that is, in the tooth portion 204, each stator lamination is further riveted and connected by the second rivet point 208, so as to further enhance the rigidity strength of the outer circle of the stator core, referring to fig. 4, exemplarily, the lamination body 300 in this embodiment has 9 stator slots 101 and 9 through holes 201, two sides of each through hole 201 are provided with a first rivet point 202, and a total of 18 first rivet points 202 are disposed, a second rivet point 208 is disposed in each tooth portion 204, and a total of 9 second rivet points 208 are provided, where the first rivet points 202 and the second rivet points 208 are both bar-shaped structures, it should be noted that the present invention is not limited to the number and shape of the above structural components, and the number is only for exemplary illustration, and those skilled in the art can set the number according to the equipment process conditions and the actual product requirements in the specific implementation.
The embodiment of the utility model provides a still provide a permanent-magnet machine, this permanent-magnet machine includes the stator, and this stator includes the permanent-magnet machine stator core that above-mentioned embodiment is disclosed, and the detailed structural feature and the advantage of permanent-magnet machine stator core can refer to the description of above-mentioned embodiment, and this is no longer repeated here.
The embodiment of the utility model provides a still provide a compressor, this compressor contains above-mentioned permanent-magnet machine.
To sum up, the utility model discloses a permanent-magnet machine stator core, permanent-magnet machine and compressor have following advantage at least:
the permanent magnet motor stator core, permanent magnet motor and the compressor that this embodiment is disclosed just is being close to the position of through-hole in the at least one side of through-hole through the first riveting point setting with on the stator punching, and this magnetic circuit that has both made on the stator punching is more even, has reduced the influence of riveting point to magnetic circuit magnetic resistance, has also strengthened the rigidity intensity of the excircle department of the stator core who forms after the riveting, avoids the problem of rocking that the stator probably produced in compressor operation process.
In the description of the present invention, it is to be understood that the terms "bottom", "longitudinal", "lateral", "up", "down", "front", "back", "vertical", "horizontal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the structures or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more and "several" means one or more unless otherwise specified.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. The utility model provides a permanent-magnet machine stator core, stator core is range upon range of formation by a plurality of stator punching, its characterized in that, the stator punching includes one and is stamped body (200), have a plurality of edges on stamping body (200) stator groove (101) towards stamping body (200) circumference evenly distributed, stator groove (101) with between the outer profile surface of stamping body (200) and be close to one side of the outer profile surface of stamping body (200) is equipped with through-hole (201), with through-hole (201) be located same circumferencial direction and be in at least one side of through-hole (201) is equipped with first riveting point (202), each after the lamination the stator punching passes through first riveting point (202) riveting connection forms stator core.
2. The stator core of the permanent magnet motor according to claim 1, wherein the outer contour surface of the punching sheet body (200) is provided with a plurality of linear lines (207) which are distributed at intervals, the position of the first riveting point (202) corresponds to the position of the linear line (207), and the extending direction of the first riveting point (202) is parallel to the extending direction of the linear line (207).
3. The stator core of the permanent magnet motor according to claim 2, wherein the lamination body (200) has an annular yoke portion (203), a plurality of teeth (204) extending from an inner periphery of the annular yoke portion (203) in a radial direction of the annular yoke portion (203), and a circular salient pole (205) extending from an outer periphery of the annular yoke portion (203) in a radial direction of the annular yoke portion (203), the stator slot (101) is formed between two adjacent teeth (204), a concave groove (206) is formed between two adjacent circular salient poles (205), and the circular salient poles (205) and the grooves (206) are smoothly connected by the straight line (207).
4. The stator core of the permanent magnet motor according to claim 3, wherein on the plane of the punching sheet body (200), the minimum distance between the stator slot (101) and the straight line (207) is a, the minimum distance between the arc salient pole (205) and the stator slot (101) is b, the maximum width of the through hole (201) along the first direction is c, and the maximum width of the first riveting point (202) along the second direction is d; the first direction is the direction perpendicular to the extending direction of the through hole (201) on the plane where the punching sheet body (200) is located, the second direction is the direction perpendicular to the extending direction of the first riveting point (202) on the plane where the punching sheet body (200) is located, and then a, b, c and d meet the following requirements: 0.8 is less than or equal to [ (a-d)/(b-c) ] < 1.2.
5. The stator core of the permanent magnet motor according to claim 1, wherein the number of the stator slots (101) is N, and the number of the first riveting points (202) is N, and N satisfy N-2N.
6. The stator core of a permanent magnet motor according to claim 1, wherein the number of the stator slots (101) is N, and the number of the first riveting points (202) is N, N and N satisfy N < 2N.
7. The permanent magnet motor stator core according to claim 3, wherein a second riveting point (208) is arranged in the tooth part (204), and each stator punching sheet is further riveted and connected through the second riveting point (208).
8. A stator core for a permanent magnet electrical machine according to claim 3, characterized in that each of said stator slots (101) is symmetrical with respect to a first centre line of symmetry, each of said through holes (201) is symmetrical with respect to a second centre line of symmetry, said first centre line of symmetry and said second centre line of symmetry coinciding.
9. A permanent magnet electrical machine comprising a stator, characterized in that the stator comprises a permanent magnet electrical machine stator core according to any of claims 1-8.
10. A compressor, characterized in that it comprises a permanent magnet motor according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922229439.2U CN210957931U (en) | 2019-12-10 | 2019-12-10 | Permanent magnet motor stator core, permanent magnet motor and compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922229439.2U CN210957931U (en) | 2019-12-10 | 2019-12-10 | Permanent magnet motor stator core, permanent magnet motor and compressor |
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| Publication Number | Publication Date |
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| CN210957931U true CN210957931U (en) | 2020-07-07 |
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| CN201922229439.2U Active CN210957931U (en) | 2019-12-10 | 2019-12-10 | Permanent magnet motor stator core, permanent magnet motor and compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872350A (en) * | 2021-10-14 | 2021-12-31 | 广东美芝制冷设备有限公司 | Stator structure, motor structure, compressor structure and refrigeration plant |
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2019
- 2019-12-10 CN CN201922229439.2U patent/CN210957931U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872350A (en) * | 2021-10-14 | 2021-12-31 | 广东美芝制冷设备有限公司 | Stator structure, motor structure, compressor structure and refrigeration plant |
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