CN106533008B - Rotor, motor and compressor - Google Patents
Rotor, motor and compressor Download PDFInfo
- Publication number
- CN106533008B CN106533008B CN201611105639.1A CN201611105639A CN106533008B CN 106533008 B CN106533008 B CN 106533008B CN 201611105639 A CN201611105639 A CN 201611105639A CN 106533008 B CN106533008 B CN 106533008B
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- rotor core
- rotor
- hole
- magnet
- central axis
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 238000003475 lamination Methods 0.000 claims description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses a rotor, a motor and a compressor, wherein the rotor comprises: the rotor core is provided with a through hole, a rotating shaft hole, a plurality of fastening holes and a plurality of magnet grooves, the plurality of magnet grooves are arranged at intervals along the circumferential direction of the rotor core, the plurality of fastening holes are arranged at intervals along the circumferential direction of the rotor core, a magnetic piece is arranged in each magnet groove, and the maximum distance between the inner circumferential surface of the through hole and the central axis of the rotor core is R 2 The minimum distance between the inner peripheral surface of the through hole and the central axis of the rotor core is R 3 The minimum distance between the inner peripheral surface of the fastening hole and the central axis of the rotor core is R 1 The radius of the shaft hole is R 4 The minimum distance between the central axis of the rotor core and the magnet slot is L 1 Half the distance between the central axes of two adjacent fastening holes is L 2 Wherein, the method comprises the steps of, wherein,the rotor provided by the embodiment of the invention has the advantages of good stability, small wind friction loss and the like.
Description
Technical Field
The invention relates to the technical field of electric appliance manufacturing, in particular to a rotor, a motor with the rotor and a compressor with the motor.
Background
In the related art, a household appliance having a compressor, such as an air conditioner, has poor stability of the compressor and a rotor thereof has a large wind resistance when rotating, resulting in a large frictional power consumption.
Disclosure of Invention
The present invention aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the invention provides the rotor, which can not reduce the efficiency of the motor, can increase the flow area of the upper part of the axial direction of the rotor, reduce the noise of the air flow of the compressor and improve the reliability and stability of the operation of the shaft system of the compressor.
The invention also provides a motor with the rotor.
The rotor iron core is provided with a through flow hole, a rotating shaft hole, a plurality of fastening holes and a plurality of magnet grooves, wherein a plurality of magnets are arranged on the rotor iron coreThe iron slots are arranged at intervals along the circumferential direction of the rotor core, the fastening holes are arranged at intervals along the circumferential direction of the rotor core, and the maximum distance between the inner circumferential surface of the through hole and the central axis of the rotor core is R 2 The minimum distance between the inner peripheral surface of the through hole and the central axis of the rotor core is R 3 The minimum distance between the inner peripheral surface of the fastening hole and the central axis of the rotor core is R 1 The radius of the rotating shaft hole is R 4 The minimum distance between the central axis of the rotor core and the magnet slot is L 1 Half of the distance between the central axes of two adjacent fastening holes is L 2 Wherein, the method comprises the steps of, wherein,the magnetic pieces are respectively matched in the magnet grooves.
According to the rotor provided by the embodiment of the invention, the third bearing of the compressor can be allowed to be inserted into the inner hole of the rotor, the distance between the bearing and the main bearing below the motor is reduced, the stability of the whole compressor shafting can be improved, the wind friction loss is small, the height of the balancing block of the rotor can be reduced, the hot jacket height of the rotor is reduced, the wind friction loss borne by the rotor is further reduced, and the performance of the motor is improved.
In addition, the rotor according to the above embodiment of the present invention may have the following additional technical features:
1.2 according to one embodiment of the invention<R 3 /R 4 <1.55。
According to one embodiment of the present invention, the rotor core includes a first lamination portion, a second lamination portion, and a third lamination portion that are sequentially arranged in an axial direction of the rotor core, the first lamination portion having a thickness L in the axial direction of the rotor core B1 The thickness of the third lamination part in the axial direction of the rotor core is L B2 The thickness of the second lamination portion located between the first lamination portion and the third lamination portion in the axial direction of the rotor core is L A Wherein, the method comprises the steps of, wherein,
according to one embodiment of the invention, the outer circumferential edge of the cross section of the rotor core is in an axisymmetric pattern.
According to one embodiment of the invention, the magnet slots are rectangular slots, two ends of each magnet slot are respectively provided with a gap part communicated with the magnet slot, and the magnetic piece is matched with the shape of the magnet slot.
According to one embodiment of the invention, the number of the magnet slots is 6 or 8.
According to one embodiment of the present invention, the rotor core is press-laminated from thin electromagnetic steel plates.
An embodiment according to a second aspect of the present invention proposes an electric machine comprising: a stator; a rotor according to an embodiment of the first aspect of the present invention.
According to the motor provided by the embodiment of the invention, the rotor provided by the embodiment of the first aspect of the invention has the advantages of good performance, strong stability and the like.
The outer diameter of the stator is D 1 The inner diameter of the stator is D 2 ，
An embodiment according to a third aspect of the invention proposes an electric machine comprising a rotor according to an embodiment of the second aspect of the invention.
According to the motor provided by the embodiment of the invention, the rotor provided by the embodiment of the second aspect of the invention has the advantages of stable and reliable performance, small vibration and the like.
Drawings
Fig. 1 is a sectional view of a compressor according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of an electric motor according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a rotor according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a rotor core of a rotor according to an embodiment of the present invention.
Reference numerals: a compressor 1, a compressor third bearing 2; the motor 10, the rotor 100, the rotor core 110, the through-hole 111, the shaft hole 112, the fastening hole 113, the magnet slot 114, the gap portion 1140, the first lamination portion 115, the second lamination portion 116, the third lamination portion 117, the magnetic member 120, and the stator 200.
Detailed Description
Embodiments of the present invention 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 invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
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 at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
A rotor 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 to 4, a rotor 100 according to an embodiment of the present invention includes a rotor core 110 and a plurality of magnetic members 120.
The rotor core 110 is provided with a through-flow hole 111, a rotating shaft hole 112, a plurality of fastening holes 113 and a plurality of magnet grooves 114, the plurality of magnet grooves 114 are arranged at intervals along the circumferential direction of the rotor core 110, the plurality of fastening holes 113 are arranged at intervals along the circumferential direction of the rotor core, and the plurality of magnetic pieces 120 are respectively matched in the plurality of magnet grooves 114. It should be understood herein that the rotor 100 is a rotor of an electric motor for a rotary compressor.
The maximum distance between the inner circumferential surface of the through-hole 111 and the central axis of the rotor core 110 is R 2 The minimum distance between the inner peripheral surface of the through-hole 111 and the central axis of the rotor core 110 is R 3 The minimum distance between the inner peripheral surface of the fastening hole 113 and the central axis of the rotor core 110 is R 1 The radius of the spindle hole 112 is R 4 The minimum distance between the center axis of the rotor core 110 and the magnet slot 114 is L 1 Half the distance between the central axes of two adjacent fastening holes 113 is L 2 Wherein, the method comprises the steps of, wherein,
since the household appliance provided with the compressor, such as an air conditioner, has the advantages that the motor is high in speed due to the fact that the ratio of the inner diameter to the outer diameter of the stator of the motor is small, the rotor is light in weight, the dynamic response speed is high, and the torque density of the motor can be further improved. Furthermore, the stability of the compressor operation is better, since the closer the distance between the compressor third bearing 2 and the main bearing below the motor is. The distance between the motor rotor and the compressor pump body can be reduced by further expanding the aperture of the shaft hole at the bottom of the rotor, the friction consumption between the rotating shaft and the third bearing 2 of the compressor can be reduced, the vibration noise generated by the motor bearing is reduced, and the compressor can stably run at a higher speed. However, the through-flow holes on the rotor are large-diameter inner holes avoiding the through-flow holes, and the through-flow holes need to be moved to the permanent magnet side in the radial direction. If the ratio of the inner diameter to the outer diameter of the motor stator is smaller, namely the outer diameter of the rotor is smaller, the balance weight at the upper end of the rotor shaft cannot avoid the through hole, so that holes are required to be punched on the balance weight. In order to ensure that the weight of the balance weight is unchanged, the height of the balance weight needs to be increased, and meanwhile, the height of the balance weight at the lower end of the rotor needs to be increased to balance the weight. The thickness of the balance weight increases, so that the windage of the rotor is increased when the compressor operates. In addition, in order to ensure that a certain safety distance is reserved between the lower end face of the rotor and the pump body, the thickness of the balancing weight at the lower end of the rotor is increased, and meanwhile, the hot jacket height of the rotor is required to be increased, so that larger vibration is easy to generate when the compressor operates.
According to the rotor 100 of the embodiment of the present invention, by enabling the shortest distance from the contour line of the through-flow hole 111 of the rotor 100 to the central axis of the rotor core 110 to be greater than the rotation shaft hole 112, the insertion of the third bearing 2 of the compressor can be allowed, and the distance between the third bearing of the compressor and the main bearing below the motor can be reduced. When the motor runs at a higher rotating speed, the stability of the whole compressor shafting is improved.
And through reasonable design of the sizes of the through hole 111, the rotating shaft hole 112 and the positions of the fastening holes 113, the height of the upper and lower balance blocks of the rotor 100 can be reduced, the wind resistance of the rotor 100 during operation of the compressor is reduced, the hot jacket height of the rotor 100 is reduced, the wind friction loss of the rotor 100 is reduced, the pressure of the rotor 100 on the third bearing 2 of the compressor is reduced, the friction power consumption is reduced, and the performance is improved.
In addition, by reasonably designing the structure sizes of the rotors, the area of the through holes can be conveniently increased, for example, the through flow area can be changed from 320mm 2 Up to 820mm 2 500mm is increased 2 . This causes the flow rate of the air stream to be rapidly reduced after the air stream reaches the upper direction of the rotor shaft through the through-flow hole 111 of the rotor 100, so that the noise of the air stream can be reduced.
Further, by reasonably designing the size of each structure on the rotor, the area of the balance weight can be conveniently enlarged, so that the thickness of the balance weight can be conveniently reduced, for example, the area of the balance weight can be changed from 780mm 2 Up to 891mm 2 The total thickness is reduced by more than 1 mm. This can significantly improve the performance of the compressor.
Therefore, the rotor 100 according to the embodiment of the present invention has advantages of good stability, small wind friction loss, and the like.
A rotor 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.
In some embodiments of the present invention, as shown in fig. 1-4, a rotor 100 according to an embodiment of the present invention includes a rotor core 110 and a plurality of magnetic members 120.
The rotor 100 is a rotor of a permanent magnet synchronous motor.
Specifically, 1.2<R 3 /R 4 <1.55. It is to be understood herein that R 3 /R 4 R means R 3 And R is 4 Is a ratio of (2). This makes it possible to more reasonably ratio between the minimum sizes of the rotation shaft hole 112 and the through-hole 111, and further to improve the stability of the motor.
More specifically, as shown in fig. 3, the rotor core 110 includes a first lamination portion 115, a second lamination portion 116, and a third lamination portion 117 that are sequentially arranged in the axial direction of the rotor core 110, the thickness of the first lamination portion 115 in the axial direction of the rotor core 110 being L B1 The thickness of the third lamination portion 117 in the axial direction of the rotor core 110 is L B2 The thickness of the second lamination portion 116 between the first lamination portion 115 and the third lamination portion 117 in the axial direction of the rotor core 110 is L A Wherein, the method comprises the steps of, wherein,in this way, holes larger than the rotating shaft hole 112 can be formed in the first lamination portion 115 and the third lamination portion 117 of the rotor core 110, so that the rotor core 110 is further close to the pump body downwards towards the motor shaft, the structure of the motor 10 is more reasonable, and the performance and stability of the compressor 1 are improved.
Advantageously, as shown in fig. 4, the outer contour of the rotor core 110 is formed in an axisymmetric pattern. For example, the outer contour of the rotor core 110 is symmetrically disposed with respect to the axis 101. Thus, the utilization rate of the magnetic element 120 can be greatly improved, and the magnetic element 120 is easy to magnetize.
More advantageously, as shown in fig. 4, the outer circumferential edge of the cross section of the rotor core 110 is circular. The rotor core 110 has an outer diameter dimension R1. This can facilitate the processing and manufacturing of the rotor core 110 and improve the production efficiency of the rotor core 110.
Further, as shown in fig. 2-4, the magnet slots 114 are rectangular slots, and the two ends of each magnet slot 114 are respectively provided with a gap portion 1140 communicated with the magnet slot 114, and the magnetic member 120 is adapted to the shape of the magnet slot 114. In other words, the magnetic member 120 has a rectangular cross section. This not only effectively prevents the magnetic member 120 from leaking along both ends of the magnet slot 114, but also facilitates the manufacture and installation of the magnetic member 120.
Fig. 2-4 illustrate a rotor 100 according to one embodiment of the present invention. As shown in fig. 2-4, the number of magnet slots 114 is 6 or 8. Specifically, when the number of the magnet slots 114 is 6, the number of the stator slots of the motor may be 9. When the number of the magnet slots 114 is 8, the number of the stator slots of the motor may be 12. Therefore, the structure of the rotor core 110 can be reasonably adjusted according to the requirements of different motors, the universality of the rotor core 110 is improved, and the rotor core is suitable for permanent magnet synchronous motors with various pole numbers.
Specifically, the rotor core 110 is press-laminated from thin electromagnetic steel plates. This can facilitate the formation and manufacture of the rotor core 110.
The motor 10 according to the embodiment of the present invention is described below. The motor 10 according to the embodiment of the present invention includes a stator 200 and a rotor, which is the rotor 100 according to the above-described embodiment of the present invention, the rotor 100 being rotatably fitted in the stator 200.
The motor 10 according to the embodiment of the present invention has advantages of good performance, strong stability, and the like by using the rotor 100 according to the above-described embodiment of the present invention.
Advantageously, as shown in fig. 2, the stator 200 has an outer diameter D 1 The stator 200 has an inner diameter D 2 ，This allows the ruler of the stator 200The size is more reasonable.
The compressor 1 according to the embodiment of the present invention is described below. The compressor 1 according to the embodiment of the present invention includes the motor 10 according to the above-described embodiment of the present invention.
The compressor 1 according to the embodiment of the present invention has advantages of stable and reliable performance, small vibration, and the like by using the motor 10 according to the above-described embodiment of the present invention.
Other constructions and operations of the compressor 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the present invention, 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 be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
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 invention. 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, 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 invention.
Claims (8)
1. A rotor, comprising:
rotor core, be equipped with through-hole, pivot hole, a plurality of fastening hole and a plurality of magnet groove on the rotor core, a plurality of the magnet groove is followed rotor core's circumference interval sets up, a plurality of the fastening hole is followed rotor core's circumference interval sets up, the maximum distance between the inner peripheral surface of through-hole with rotor core's the central axis is R 2 The minimum distance between the inner peripheral surface of the through hole and the central axis of the rotor core is R 3 The minimum distance between the inner peripheral surface of the fastening hole and the central axis of the rotor core is R 1 The radius of the rotating shaft hole is R 4 The minimum distance between the central axis of the rotor core and the magnet slot is L 1 Half of the distance between the central axes of two adjacent fastening holes is L 2 ，
Wherein,
the magnetic pieces are respectively matched in the magnet grooves; the rotor core comprises a first lamination part, a second lamination part and a third lamination part which are sequentially arranged in the axial direction of the rotor core, wherein the thickness of the first lamination part in the axial direction of the rotor core is L B1 The thickness of the third lamination part in the axial direction of the rotor core is L B2 The thickness of the second lamination portion located between the first lamination portion and the third lamination portion in the axial direction of the rotor core is L A ，
Wherein,
the through hole and the rotating shaft hole form a stepped hole R 3 ＞R 4 ，1.2<R 3 /R 4 <1.55。
2. The rotor of claim 1, wherein the outer periphery of the cross section of the rotor core is in an axisymmetric pattern.
3. The rotor of claim 1, wherein the magnet slots are rectangular slots, and each of the magnet slots has a gap portion at each end thereof, the gap portion being in communication with the magnet slot, and the magnetic member being adapted to the shape of the magnet slot.
4. The rotor of claim 1, wherein the number of magnet slots is 6 or 8.
5. The rotor of claim 1, wherein the rotor core is stamped and laminated from thin electromagnetic steel sheets.
6. An electric machine, comprising:
the stator is provided with a plurality of slots,
a rotor according to any one of claims 1-5, which is rotatably fitted within the stator.
7. The electric machine of claim 6, wherein the stator has an outer diameter D 1 The inner diameter of the stator is D 2 ，
8. A compressor comprising a motor according to claim 6 or 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105639.1A CN106533008B (en) | 2016-12-05 | 2016-12-05 | Rotor, motor and compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105639.1A CN106533008B (en) | 2016-12-05 | 2016-12-05 | Rotor, motor and compressor |
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| CN106533008A CN106533008A (en) | 2017-03-22 |
| CN106533008B true CN106533008B (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611105639.1A Active CN106533008B (en) | 2016-12-05 | 2016-12-05 | Rotor, motor and compressor |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110431726B (en) * | 2017-03-27 | 2021-10-12 | 三菱电机株式会社 | Rotor, motor, compressor, blower, and air conditioner |
| CN107659008A (en) * | 2017-11-13 | 2018-02-02 | 安徽美芝精密制造有限公司 | Electric machine assembly, compressor and the refrigeration plant of compressor |
| CN108462263A (en) * | 2018-03-29 | 2018-08-28 | 广东美芝制冷设备有限公司 | Motor, compressor and refrigeration equipment |
| CN110932422B (en) * | 2019-12-11 | 2022-04-01 | 安徽美芝精密制造有限公司 | Motor, compressor and refrigeration plant |
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| CN106533008A (en) | 2017-03-22 |
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