CN107591911B - Rotor punching sheet, rotor core, motor and compressor - Google Patents
Rotor punching sheet, rotor core, motor and compressor Download PDFInfo
- Publication number
- CN107591911B CN107591911B CN201710766359.3A CN201710766359A CN107591911B CN 107591911 B CN107591911 B CN 107591911B CN 201710766359 A CN201710766359 A CN 201710766359A CN 107591911 B CN107591911 B CN 107591911B
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- hole
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- peripheral wall
- punching sheet
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Abstract
The invention discloses a rotor punching sheet, a rotor iron core, a motor and a compressor, wherein the rotor punching sheet is provided with a shaft hole and a plurality of magnet grooves which are arranged at intervals in the circumferential direction around the shaft hole, a first through hole, a second through hole and a third through hole which are arranged at intervals in the circumferential direction and penetrate through the rotor punching sheet in the thickness direction are arranged between each magnet groove and the outer contour of the rotor punching sheet, the second through hole is arranged between the first through hole and the third through hole, the first through hole, the second through hole and the third through hole can penetrate through one of the circumferential wall of the magnet groove and the outer circumferential wall of the rotor punching sheet, and at least one of the first through hole, the second through hole and the third through hole penetrates through the circumferential wall of the magnet groove. According to the rotor punching sheet provided by the embodiment of the invention, the concentricity between the stator and the rotor can be considered, the low-spatial order low-frequency radial force of the motor can be reduced, the performance of the motor can be improved, and the manufacturing process is simple.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a rotor punching sheet, a rotor core with the rotor punching sheet, a motor with the rotor core and a compressor with the motor.
Background
The motor in the related technology can not give consideration to both the concentricity of the stator and the rotor and the low-spatial order low-frequency radial force of the motor, and the performance of the motor is poor.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the rotor punching sheet provided by the invention can reduce the low-spatial order low-frequency radial force of the motor and improve the performance of the motor while considering the concentricity of the rotor, and is simple in manufacturing process.
The invention further provides a rotor core with the rotor punching sheet.
The invention further provides a motor with the rotor core.
The invention also provides a compressor with the motor.
According to the rotor punching sheet provided by the embodiment of the first aspect of the invention, the rotor punching sheet is provided with the shaft hole and the plurality of magnet grooves which are circumferentially arranged at intervals around the shaft hole, the first through hole, the second through hole and the third through hole which are circumferentially arranged at intervals and penetrate through the rotor punching sheet in the thickness direction are arranged between each magnet groove and the outer contour of the rotor punching sheet, the second through hole is arranged between the first through hole and the third through hole, the first through hole, the second through hole and the third through hole can penetrate through one of the peripheral wall of the magnet groove and the peripheral wall of the rotor punching sheet, and at least one of the first through hole, the second through hole and the third through hole penetrates through the peripheral wall of the magnet groove.
According to the rotor punching sheet provided by the embodiment of the invention, the first through hole, the second through hole and the third through hole are arranged, so that the concentricity between the stator and the rotor is considered, the low-spatial-order low-frequency radial force of the motor is reduced, the low-frequency vibration of the motor is reduced, the performance of the motor is improved, and the manufacturing process is simple.
In addition, the rotor sheet according to the embodiment of the invention can also have the following additional technical characteristics:
according to an embodiment of the present invention, a center line of the second through hole coincides with a center line of the magnet slot, and the first through hole and the third through hole are symmetrically disposed about the center line of the second through hole.
According to an embodiment of the present invention, the second through hole includes a circular hole section and a linear groove section, one end of the linear groove section is communicated with the circular hole section, and the other end of the linear groove section penetrates through one of a peripheral wall of the magnet groove and a peripheral wall of the rotor punching sheet.
According to an embodiment of the present invention, the first through hole and/or the third through hole is formed in a straight line.
According to an embodiment of the present invention, the second through hole penetrates through a peripheral wall of the magnet slot, and the first through hole and the third through hole both penetrate through a peripheral wall of the rotor sheet.
According to an embodiment of the present invention, the first through hole, the second through hole, and the third through hole each penetrate a peripheral wall of the magnet slot.
According to an embodiment of the invention, the second through hole penetrates through an outer peripheral wall of the rotor punching sheet, and the first through hole and the third through hole both penetrate through a peripheral wall of the magnet groove.
The rotor core according to the second aspect of the present invention includes the rotor punching sheet according to the first aspect of the present invention.
According to the rotor core provided by the embodiment of the invention, the rotor punching sheet provided by the embodiment of the first aspect of the invention is arranged, so that the rotor core has all the advantages of the rotor punching sheet, the concentricity between the stator and the rotor can be considered, the low-spatial-order low-frequency radial force of the motor can be reduced, the low-frequency vibration of the motor can be reduced, the performance of the motor can be improved, and the manufacturing process is simple.
A motor according to an embodiment of the third aspect of the present invention includes a rotor core according to the embodiment of the second aspect of the present invention described above.
According to the motor provided by the embodiment of the invention, the rotor core provided by the embodiment of the second aspect of the invention is arranged, so that the motor has all the advantages of the rotor core, namely, the concentricity between the stator and the rotor is considered, the low-spatial-order low-frequency radial force of the motor is reduced, the low-frequency vibration of the motor is reduced, the performance of the motor is improved, and the manufacturing process is simple.
A compressor according to an embodiment of the present invention includes a motor according to an embodiment of the above third aspect of the present invention.
According to the compressor provided by the embodiment of the invention, the motor provided by the embodiment of the third aspect of the invention is arranged, so that the compressor has all advantages of the motor, the performance of the compressor is good, and the manufacturing process is simple.
Additional aspects and advantages of the invention 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 invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a rotor sheet according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a rotor sheet according to another embodiment of the present invention;
FIG. 3 is a schematic structural view of a rotor sheet according to yet another embodiment of the present invention;
fig. 4 is a magnetic pole layout of a rotor sheet according to an embodiment of the present invention.
Reference numerals:
a rotor sheet 100;
a shaft hole 1;
a magnet groove 2;
a first through-hole 3;
a second through hole 4; a circular bore section 41; a linear groove segment 42;
a third through hole 5;
the peripheral wall 101 of the magnet slot 2; an outer peripheral wall 102 of the rotor sheet 100; a peripheral wall 103 of the shaft hole 1; a centerline 104.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "thickness", "upper", "lower", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present application is based on applicants' discovery and recognition of the following facts and problems:
rotors in the related art generally adopt a cantilever structure and only have a unilateral bearing, so that in the installation process of the rotors, air gaps of the rotors need to be controlled by adjusting tools such as a feeler gauge and the like, and the process requires that an inner circular surface of a stator and an outer circular surface of the rotors need to be concentric circular arcs in a large range to well position the concentric circular arcs. Therefore, the outer circular arc of the rotor core must have a concentric circular arc with a larger span angle, so that the optimization difficulty of the rotor is increased, the low-spatial-order low-frequency component in the radial force of the motor is difficult to reduce, and the motor vibration is large.
In order to solve the above problems, the following two methods are generally adopted: (1) the outer circular arc of the rotor is designed into an eccentric structure, which is convenient for optimizing the rotor and reducing low-spatial-order low-frequency components in the radial force of the motor, but the point-surface corresponding relation exists between the outer circular surface of the rotor and the inner circular surface of the stator, and the air gap precision is not well controlled; (2) the outer circular arc of the rotor consists of a concentric circular arc and two eccentric circular arcs arranged at two ends of the concentric circular arc, the outer circular surface of the rotor and the inner circular surface of the stator are of corresponding structures which face each other, the air gap precision can be well controlled, and the radial force of low-spatial-order low-frequency components is large. Therefore, the motor in the related art cannot give consideration to both the concentricity of the stator and the rotor and the low-spatial order low-frequency radial force of the motor, and the performance of the motor is poor.
For this reason, this application provides a rotor punching 100, rotor punching 100 can reduce the low spatial order low frequency radial force of motor under the prerequisite of guaranteeing the fixed rotor concentricity, reduces the low frequency vibration of motor, promotes the motor performance, and manufacturing process is simple.
A rotor sheet 100 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 4.
As shown in fig. 1 to 4, a shaft hole 1 and a plurality of magnet grooves 2 arranged around the shaft hole 1 at intervals in the circumferential direction are provided on a rotor sheet 100 according to an embodiment of the present invention, a first through hole 3, a second through hole 4 and a third through hole 5 which are spaced apart in the circumferential direction and penetrate through the rotor sheet 100 in the thickness direction are provided between each magnet groove 2 and the outer contour of the rotor sheet 100, the second through hole 4 is located between the first through hole 3 and the third through hole 5, each of the first through hole 3, the second through hole 4 and the third through hole 5 can penetrate through one of a circumferential wall 101 of the magnet groove 2 and an outer circumferential wall 102 of the rotor sheet 100, and at least one of the first through hole 3, the second through hole 4 and the third through hole 5 penetrates through the circumferential wall 101 of the magnet groove 2.
Specifically, the first through hole 3 may penetrate through one of the peripheral wall 101 of the magnet slot 2 and the peripheral wall 102 of the rotor sheet 100, that is, in some examples, the first through hole 3 penetrates through the peripheral wall 101 of the magnet slot 2, and in other examples, the first through hole 3 penetrates through the peripheral wall 102 of the rotor sheet 100;
the second through hole 4 may also penetrate through one of the peripheral wall 101 of the magnet slot 2 and the peripheral wall 102 of the rotor sheet 100, that is, in some examples, the second through hole 4 penetrates through the peripheral wall 101 of the magnet slot 2, and in other examples, the second through hole 4 penetrates through the peripheral wall 102 of the rotor sheet 100;
the third through hole 5 may also penetrate through one of the peripheral wall 101 of the magnet slot 2 and the peripheral wall 102 of the rotor sheet 100, that is, in some examples, the third through hole 5 penetrates through the peripheral wall 101 of the magnet slot 2, and in other examples, the third through hole 5 penetrates through the peripheral wall 102 of the rotor sheet 100.
Wherein at least one of the first through hole 3, the second through hole 4 and the third through hole 5 penetrates the peripheral wall 101 of the magnet slot 2, i.e. only one of the first through hole 3, the second through hole 4 and the third through hole 5 may penetrate the peripheral wall 101 of the magnet slot 2, e.g. only the first through hole 3 penetrates the peripheral wall 101 of the magnet slot 2, or only the second through hole 4 penetrates the peripheral wall 101 of the magnet slot 2, or only the third through hole 5 penetrates the peripheral wall 101 of the magnet slot 2; or only two of the first through hole 3, the second through hole 4, and the third through hole 5 penetrate through the peripheral wall 101 of the magnet slot 2, for example, the first through hole 3 and the second through hole 4 both penetrate through the peripheral wall 101 of the magnet slot 2, or the first through hole 3 and the third through hole 5 both penetrate through the peripheral wall 101 of the magnet slot 2, or the second through hole 4 and the third through hole 5 both penetrate through the peripheral wall 101 of the magnet slot 2; or all of the first through hole 3, the second through hole 4, and the third through hole 5 penetrate the peripheral wall 101 of the magnet slot 2.
According to the rotor punching sheet 100 provided by the embodiment of the invention, the first through hole 3, the second through hole 4 and the third through hole 5 are arranged, so that the lowest spatial order and the time 2 frequency multiplication component of the radial force of the motor can be reduced while the concentricity between the stator and the rotor is considered, the low-frequency vibration of the motor is reduced, the performance of the motor is improved, and the manufacturing process is simple.
Preferably, as shown in fig. 1-4, the peripheral wall 102 of the rotor punching sheet 100 and the peripheral wall 103 of the shaft hole 1 are concentric circles, so that the concentricity between the stator and the rotor can be further improved, the spatial lowest order of the radial force of the motor is reduced, the time 2 frequency multiplication component is reduced, and the motor performance is better.
In one embodiment of the present invention, as shown in fig. 1 to 4, the center line 104 of the second through hole 4 coincides with the center line 104 of the magnet slot 2, and the first through hole 3 and the third through hole 5 are symmetrically arranged with respect to the center line 104 of the second through hole 4, so that the concentricity of the stator and the rotor can be further improved, the spatial lowest order and time 2 frequency multiplication components of the radial force of the motor can be reduced, and the motor performance is better.
In a preferred embodiment of the present invention, as shown in fig. 1 to 4, the second through hole 4 includes a circular hole section 41 and a linear groove section 42, one end of the linear groove section 42 communicates with the circular hole section 41, and the other end of the linear groove section 42 penetrates one of the peripheral wall 101 of the magnet slot 2 and the peripheral wall 102 of the rotor punching sheet 100. That is, in some examples, as shown in fig. 1 and 3, the other end of the linear groove segment 42 penetrates the peripheral wall 101 of the magnet groove 2; in other examples, as shown in fig. 2, the other end of the linear groove segment 42 penetrates the outer peripheral wall 102 of the rotor sheet 100. Therefore, the concentricity of the stator and the rotor can be further improved, the space lowest order of radial force of the motor is reduced, the time 2 frequency multiplication component is reduced, and the motor performance is better.
In one embodiment of the present invention, as shown in fig. 1 to 4, the first through-hole 3 and/or the third through-hole 5 are formed linearly. That is, in some examples, only the first through-hole 3 is formed linearly, in another example, only the second through-hole 4 is formed linearly, and in still other examples, as shown in fig. 1 to 4, both the first through-hole 3 and the second through-hole 4 are formed linearly. Therefore, the concentricity of the stator and the rotor can be further improved, the space lowest order of radial force of the motor is reduced, the time 2 frequency multiplication component is reduced, and the motor performance is better.
In one specific example of the present invention, as shown in fig. 1, the second through hole 4 penetrates through the peripheral wall 101 of the magnet slot 2, and the first through hole 3 and the third through hole 5 each penetrate through the peripheral wall 102 of the rotor punching sheet 100.
In another specific example of the present invention, as shown in fig. 3, the first through hole 3, the second through hole 4, and the third through hole 5 each penetrate the peripheral wall 101 of the magnet slot 2.
In still another specific example of the present invention, as shown in fig. 2, the second through hole 4 penetrates through the outer circumferential wall 102 of the rotor sheet 100, and the first through hole 3 and the third through hole 5 each penetrate through the circumferential wall 101 of the magnet slot 2.
The rotor core according to the second aspect of the present invention includes the rotor sheet 100 according to the first aspect of the present invention. Specifically, the rotor core is formed by stacking a plurality of the above-mentioned rotor sheets 100, and further includes a plurality of permanent magnets, which are disposed in the plurality of magnet slots 2 in a one-to-one correspondence manner.
According to the rotor core provided by the embodiment of the invention, by arranging the rotor sheet 100 according to the embodiment of the first aspect of the invention, the rotor core has all the advantages of the rotor sheet 100, namely, the concentricity between the stator and the rotor is considered, the low-spatial order low-frequency radial force of the motor is reduced, the low-frequency vibration of the motor is reduced, the performance of the motor is improved, and the manufacturing process is simple.
A motor according to an embodiment of the third aspect of the present invention includes a rotor core according to the embodiment of the second aspect of the present invention described above.
According to the motor provided by the embodiment of the invention, the rotor core provided by the embodiment of the second aspect of the invention is arranged, so that the motor has all the advantages of the rotor core, namely, the concentricity between the stator and the rotor is considered, the low-spatial-order low-frequency radial force of the motor is reduced, the low-frequency vibration of the motor is reduced, the performance of the motor is improved, and the manufacturing process is simple.
A compressor according to an embodiment of the present invention includes a motor according to an embodiment of the above third aspect of the present invention.
According to the compressor provided by the embodiment of the invention, the motor provided by the embodiment of the third aspect of the invention is arranged, so that the compressor has all advantages of the motor, the performance of the compressor is good, and the manufacturing process is simple.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A rotor punching sheet is characterized in that a shaft hole and a plurality of magnet grooves are formed in the rotor punching sheet at intervals in the circumferential direction around the shaft hole, a first through hole, a second through hole and a third through hole which are spaced in the circumferential direction and penetrate through the rotor punching sheet in the thickness direction are formed between each magnet groove and the outer contour of the rotor punching sheet, the second through hole is located between the first through hole and the third through hole, the first through hole, the second through hole and the third through hole can penetrate through one of the circumferential wall of the magnet groove and the circumferential wall of the rotor punching sheet, and at least one of the first through hole, the second through hole and the third through hole penetrates through the circumferential wall of the magnet groove; the second through hole comprises a circular hole section and a linear groove section, one end of the linear groove section is communicated with the circular hole section, and the other end of the linear groove section penetrates through one of the peripheral wall of the magnet groove and the peripheral wall of the rotor punching sheet.
2. The rotor sheet according to claim 1, wherein a center line of the second through hole coincides with a center line of the magnet slot, and the first through hole and the third through hole are symmetrically arranged with respect to the center line of the second through hole.
3. The rotor sheet according to claim 1, wherein the first through hole and/or the third through hole are formed in a straight line shape.
4. The rotor sheet according to any one of claims 1 to 3, wherein the second through hole penetrates through a peripheral wall of the magnet groove, and the first through hole and the third through hole both penetrate through the peripheral wall of the rotor sheet.
5. The rotor sheet according to any one of claims 1 to 3, wherein the first through hole, the second through hole, and the third through hole all penetrate through a peripheral wall of the magnet slot.
6. The rotor sheet according to any one of claims 1 to 3, wherein the second through hole penetrates through an outer peripheral wall of the rotor sheet, and the first through hole and the third through hole both penetrate through a peripheral wall of the magnet groove.
7. A rotor core, characterized by comprising a rotor sheet according to any one of claims 1 to 6.
8. An electric machine comprising a rotor core according to claim 7.
9. A compressor, characterized by comprising an electric machine according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710766359.3A CN107591911B (en) | 2017-08-30 | 2017-08-30 | Rotor punching sheet, rotor core, motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710766359.3A CN107591911B (en) | 2017-08-30 | 2017-08-30 | Rotor punching sheet, rotor core, motor and compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107591911A CN107591911A (en) | 2018-01-16 |
| CN107591911B true CN107591911B (en) | 2020-01-24 |
Family
ID=61050350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710766359.3A Active CN107591911B (en) | 2017-08-30 | 2017-08-30 | Rotor punching sheet, rotor core, motor and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107591911B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7053392B2 (en) * | 2018-07-13 | 2022-04-12 | オークマ株式会社 | Rotor of synchronous motor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3631583B2 (en) * | 1997-03-31 | 2005-03-23 | 三菱電機株式会社 | Permanent magnet motor |
| US6891298B2 (en) * | 2002-08-28 | 2005-05-10 | Emerson Electric Co. | Interior permanent magnet machine with reduced magnet chattering |
| CN102214958A (en) * | 2010-04-06 | 2011-10-12 | 上海海立（集团）股份有限公司 | Stator and rotor structure of permanent magnet motor |
| CN104753263B (en) * | 2014-02-12 | 2017-02-08 | 江苏大中电机股份有限公司 | Punching and shearing method of stator punched sheet and rotor punched sheet of motor |
| CN106340982B (en) * | 2016-10-19 | 2018-12-25 | 珠海格力电器股份有限公司 | Rotor of permanent magnet synchronous motor and motor |
| CN106877534A (en) * | 2017-03-16 | 2017-06-20 | 安徽美芝制冷设备有限公司 | Rotor, motor, compressor and refrigerator |
| CN106953443B (en) * | 2017-03-28 | 2023-11-28 | 安徽美芝制冷设备有限公司 | Rotor for motor, motor and compressor |
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2017
- 2017-08-30 CN CN201710766359.3A patent/CN107591911B/en active Active
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