CN210957930U

CN210957930U - Permanent magnet motor stator core, permanent magnet motor and compressor

Info

Publication number: CN210957930U
Application number: CN201922228679.0U
Authority: CN
Inventors: 范杰; 张兴志; 孙建龙
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-07-07
Anticipated expiration: 2029-12-10

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, stator groove with be equipped with the riveting point between the outer profile surface of piece body, be equipped with the welding groove on the outer profile surface towards piece body, be equipped with the welding point in the welding groove, the welding point that is located on each stator lamination on the stator core same axial direction forms a welding orbit, along welding orbit welded connection and through the riveting point riveting connection, form stator core; the utility model provides the high rigidity intensity of stator core excircle department.

Description

Permanent magnet motor stator core, permanent magnet motor and compressor

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, in the stator lamination 100 in the prior art, a riveting point 102 is generally arranged between an outer circle of the stator lamination and a stator slot 101, so that the laminated stator lamination 100 is riveted to form the stator core. However, the through hole 207 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 207 and the stator slot 101, which makes the stator lamination 100 have insufficient rigidity at the outer circle of the stator core during the operation of the compressor after riveting.

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 the range upon range of formation of a plurality of stator punching, stator punching includes one towards the piece body, towards having a plurality of edges on the piece body towards the stator groove of piece body circumference evenly distributed, the stator groove with be equipped with the riveting point between the outer profile face towards the piece body, be equipped with the welding groove on the outer profile face towards the piece body, be equipped with welding point, each in the welding groove stator punching on be located on the same axial direction of stator core the welding point forms a welding track, with each stator punching along welding track welded connection passes through riveting point riveted connection forms stator core.

Preferably, the welding point is connected with a central point of the punching sheet body to form a first straight line, a central point of the riveting point is connected with a central point of the punching sheet body to form a second straight line, and an angle is formed between the first straight line and the second straight line.

Preferably, the punch body has an annular yoke portion, a plurality of teeth portions extending from an inner periphery of the annular yoke portion radially inward of the annular yoke portion, and a plurality of circular arc salient poles extending from an outer periphery of the annular yoke portion radially outward of the annular yoke portion; the stator slot is formed between every two adjacent tooth parts, a groove is formed between every two adjacent arc salient poles, and the welding slot is located in the groove.

Preferably, a through hole is formed in one side, close to the arc salient pole, of the punching sheet body, and the side is located between the riveting point and the arc salient pole.

Preferably, the minimum distance between the welding slot and the stator slot is a, the minimum distance between the arc salient pole and the stator slot is b, the maximum width of the through hole in the first direction is c, and the maximum width of the riveting point in the 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 riveting point extending direction on the plane of piece body place, then a, b, c and d satisfy: 0.8 x (b-c-d) is more than or equal to a and less than or equal to 1.2 x (b-c-d).

Preferably, the minimum distance between the welding groove and the through hole on the plane where the stamped sheet body is located is e, the minimum distance between the arc salient pole and the through hole on the plane where the stamped sheet body is located is f, and then e and f satisfy: e is more than or equal to f.

Preferably, the number of the welding grooves is N, the number of the welding points is m, the number of the stator grooves is N, and then m, N, and N satisfy: n is less than or equal to 2N, and m is less than or equal to N.

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 set up the riveting point will range upon range of stator towards the base of piece riveting connection fixation on, set up the welding groove on the profile face outward, make range upon range of stator towards the welding point formation welding track of inslot that welds on the piece, then along this welding track with range upon range of stator towards piece welded fastening, under the prerequisite that does not influence motor efficiency, the rigidity intensity of stator core excircle department has been improved, avoid the problem of rocking that the stator probably produced in compressor operation in-process.

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.

Example one

As shown in fig. 2, the embodiment of the utility model discloses a permanent magnet motor stator core is disclosed, this stator core is by a plurality of stator towards the range upon range of formation of piece, and above-mentioned stator towards the piece including one towards piece body 200, towards having a plurality of stator slots 101 towards piece body 200 circumference evenly distributed towards on the piece body 200, stator slots 101 and the above-mentioned outer profile surface towards piece body 200 between be equipped with riveting point 102. Specifically, the die body 200 has a ring yoke portion 203, a plurality of teeth portions 204 extending inward in the radial direction of the ring yoke portion 203 from the inner periphery of the ring yoke portion 203, and a plurality of circular-arc salient poles 205 extending outward in the radial direction of the ring yoke portion 203 from the outer periphery of the ring yoke portion 203; the stator slot 101 is formed between two adjacent teeth 204, the arc salient pole 205 is a section of arc on the outer contour surface of the punching body 200, a groove 206 is formed between two adjacent sections of arc salient poles 205, a through hole 207 is formed between the rivet joint 102 and the arc salient pole 205 and on the side close to the arc salient pole 205, and the through hole 207 is used for circulating a refrigerant, improving oil return, dissipating heat and the like.

In this embodiment, the through hole 207 is a kidney-shaped hole, but the present invention does not limit the shape of the through hole 207. Each stator slot 101 is itself symmetrical about a first center line of symmetry, and each through hole 207 is itself symmetrical about a second center line of symmetry, which coincide.

In the prior art, the laminated stator laminations are riveted and fixed through the riveting point 102, but the riveting point 102 is located on the radial inner side of the through hole 207, so that the rigidity strength of the outer circle of the stator core is insufficient in the running process of the compressor, and the riveted stator core may shake.

Therefore, in this embodiment, a welding groove 201 is formed in the outer contour surface of the punching sheet body 200, the welding groove 201 is located in the groove 206, a welding point 202 is formed in the welding groove 201, the welding points on the stator punching sheets located in the same axial direction of the stator core form a welding track, and the stator punching sheets are welded and connected along the welding track and are riveted and connected through the riveting point 102 to form the stator core. Therefore, the stator punching sheets are connected in a welding mode through welding points and in a riveting mode, and therefore the strength of the outer circle of the stator core is enhanced. In this embodiment, the above welding mode is argon arc welding or laser welding, but the utility model discloses do not use this as the limit. It should be noted that, in the specific implementation of the present invention, the welding track formed by only part of the welding points 202 may be welded, and not all the welding tracks are welded, so that those skilled in the art can weld according to actual needs.

The number of the welding grooves 201 is N, the number of the welding points 202 is m, and the number of the stator grooves 101 is N, so that m, N and N satisfy N is less than or equal to 2N, and m is less than or equal to N.

As a preferred embodiment of the present application, n is an even number.

As a preferred embodiment of the present application, m, N and N satisfy N ═ 2N, and m ═ N.

As a preferred embodiment of the present application, n welding grooves 201 are divided into a preset number of groups, the number of welding grooves 201 in each group is the same, and the welding grooves 201 of the preset number of groups are symmetrically distributed about a central point of the punching sheet body 200. For example, 12 welding grooves 201 are arranged on the punching sheet body 200, the 12 welding grooves 201 are divided into 3 groups, each group includes 4 welding grooves 201, and the 4 welding grooves 201 in each group are continuously distributed on the outer contour surface of the punching sheet body 200, so that the 3 groups of welding grooves 201 are symmetrically distributed about the central point of the punching sheet body 200.

Welding point 202 is connected with the central point of above-mentioned towards piece body 200 and is formed first straight line, and the central point of above-mentioned riveting point 102 is connected with the central point of above-mentioned towards piece body 200 and is formed the second straight line, and above-mentioned first straight line forms an angle with above-mentioned second straight line, has realized like this that the excircle department from different directions to stator core reinforces the connection, has further guaranteed the intensity of stator core excircle department.

Fig. 3 is an enlarged 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 usually enters from one tooth 204, then passes through the annular yoke 203, and exits from the other tooth 204, and since the arrangement of the welding slot 201 may cause a significant increase in local magnetic resistance, which may cause a decrease in motor efficiency, the size of the welding slot in this embodiment needs to satisfy a specific condition. As shown in fig. 3, a minimum distance between the welding slot 201 and the stator slot 101 is a, a minimum distance between the arc salient pole 205 and the stator slot 101 is b, a maximum width of the through hole 207 in the first direction is c, and a maximum width of the rivet 102 in the second direction is d; the first direction is a direction perpendicular to the extending direction of the through hole 207 on the plane of the punching sheet body 200, and the second direction is a direction perpendicular to the extending direction of the rivet point 102 on the plane of the punching sheet body 200.

The minimum distance between the welding groove 201 and the through hole 207 on the plane of the punching sheet body 200 is e, the minimum distance between the arc salient pole 205 and the through hole 207 on the plane of the punching sheet body 200 is f, and in order to ensure that the arrangement of the welding groove 201 does not influence the local magnetic resistance, a, b, c and d in the embodiment satisfy: 0.8 ≦ a ≦ 1.2 ≦ b-c-d, e and f satisfy: e is more than or equal to f.

Exemplarily, as shown in fig. 2, the punching sheet body 200 in the present embodiment has 9 stator slots 101, 9 riveting points 102 are provided between the outer circle of the punching sheet body 200 and the stator slots 101, a through hole 207 is provided between the riveting point 102 and the outer circle of the punching sheet body 200, two welding slots 201 are provided in each groove 206, one welding point 202 is provided in each welding slot 201, a total of 18 welding points 202 are provided on the punching sheet body 200, the welding points 202 do not protrude out of the welding slots 201, and the size of the welding slots 201 satisfies the requirement: a/(b-c-d) ═ 0.97, and e/f ═ 2.5, but the present invention is not limited thereto.

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 that the rigidity strength of the outer circle of the stator core can be further enhanced, referring to fig. 4, for example, 9 rivet points 102 are disposed between the outer circle of the lamination body 300 and the stator slots 101 in this embodiment, one second rivet point 208 is disposed in each tooth portion 204, there are 9 second rivet points 208 in total, one welding point 202 is disposed in each welding slot 201, and there are 18 welding points 202 on the lamination body 300. Wherein, riveting point 102 and second riveting point 208 are bar structures, it should be noted that the utility model discloses do not do all do not do the restriction to the quantity and the shape of each structure component parts above-mentioned, above-mentioned quantity is used for illustrative explanation only, and the technical staff in the art can set up according to equipment process conditions and actual product demand when concrete 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 that this embodiment discloses, permanent magnet motor and compressor set up the riveting point and on the fixed basis of range upon range of stator punching riveting connection, set up the welding groove on outer profile surface, the welding point that makes on the range upon range of stator punching in the welding groove forms the welding orbit, then along this welding orbit with range upon range of stator punching welded fastening, under the prerequisite that does not influence motor efficiency, the rigidity intensity of stator core excircle department has been improved, avoid the problem of rocking that probably produces at compressor operation in-process stator.

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

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, stator punching includes one and is stamped a piece body (200), have a plurality of edges on the piece body (200) stator groove (101) towards piece body (200) circumference evenly distributed, stator groove (101) with be equipped with riveting point (102) between the outer profile face towards piece body (200), be equipped with welding groove (201) on the outer profile face towards piece body (200), be equipped with welding point (202) in welding groove (201), each be located on the stator punching the same axial direction of stator core welding point forms a welding track, with each stator punching along welding track welding connection and through riveting point (102) riveting connection forms stator core.

2. The stator core of the permanent magnet motor according to claim 1, wherein the welding point (202) is connected with a central point of the punching sheet body (200) to form a first straight line, a central point of the riveting point (102) is connected with a central point of the punching sheet body (200) to form a second straight line, and the first straight line and the second straight line form an angle.

3. The permanent magnet motor stator core according to claim 1, wherein the lamination body (200) has an annular yoke portion (203), a plurality of teeth portions (204) extending from an inner periphery of the annular yoke portion (203) radially inward of the annular yoke portion (203), and a plurality of circular arc salient poles (205) extending from an outer periphery of the annular yoke portion (203) radially outward of the annular yoke portion (203); the stator slot (101) is formed between two adjacent teeth (204), a groove (206) is formed between two adjacent arc salient poles (205), and the welding slot (201) is located in the groove (206).

4. The stator core of the permanent magnet motor according to claim 3, wherein a through hole (207) is formed in the punching sheet body (200) between the rivet point (102) and the circular arc salient pole (205) and on a side close to the circular arc salient pole (205).

5. The stator core of a permanent magnet motor according to claim 4, wherein the minimum distance between the welding slot (201) and the stator slot (101) 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 (207) in the first direction is c, and the maximum width of the rivet point (102) in the second direction is d; the first direction is a direction perpendicular to the extending direction of the through hole (207) on the plane where the stamped sheet body (200) is located, the second direction is a direction perpendicular to the extending direction of the riveting point (102) on the plane where the stamped sheet body (200) is located, and a, b, c and d meet the following requirements: 0.8 x (b-c-d) is more than or equal to a and less than or equal to 1.2 x (b-c-d).

6. The stator core of the permanent magnet motor as claimed in claim 4, wherein the minimum distance between the welding slot (201) and the through hole (207) on the plane of the punching sheet body (200) is e, and the minimum distance between the circular arc salient pole (205) and the through hole (207) on the plane of the punching sheet body (200) is f, then e and f satisfy: e is more than or equal to f.

7. The stator core of a permanent magnet motor according to claim 1, wherein the number of welding slots (201) is N, the number of welding points (202) is m, the number of stator slots (101) is N, and m, N and N satisfy: n is less than or equal to 2N, and m is less than or equal to N.

8. 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).

9. The stator core of a permanent magnet motor according to claim 4, wherein each of the stator slots (101) is symmetrical about a first center line of symmetry, each of the through holes (207) is symmetrical about a second center line of symmetry, and the first center line of symmetry and the second center line of symmetry coincide.

10. 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 1-9.

11. A compressor, characterized in that it comprises a permanent magnet motor according to claim 10.