CN111327137B - Outer rotor structure of generator - Google Patents
Outer rotor structure of generator Download PDFInfo
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- CN111327137B CN111327137B CN202010262826.0A CN202010262826A CN111327137B CN 111327137 B CN111327137 B CN 111327137B CN 202010262826 A CN202010262826 A CN 202010262826A CN 111327137 B CN111327137 B CN 111327137B
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- steel
- rotor
- magnetic steel
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- small magnetic
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- 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
- H02K1/2786—Outer rotors
Abstract
The invention discloses an outer rotor structure of a generator, which comprises a rotor main body, a rotor end cover and a plurality of magnetic poles, wherein the rotor main body is of a cylindrical structure, the magnetism of the adjacent magnetic poles is opposite, the magnetic poles are all fixed on the inner wall of the rotor main body, the magnetic poles are all in central symmetry with respect to the axis of the rotor main body, one end of the rotor main body is provided with a side plate, the other end of the rotor main body is fixedly connected with the rotor end cover, the center of the side plate is used for being in transmission connection with a rotating shaft, and a stator of the generator is arranged between the rotating shaft and the magnetic poles. The invention can provide the outer rotor structure of the generator with good heat dissipation, good balance and high reliability.
Description
Technical Field
The invention relates to the technical field of generators, in particular to an outer rotor structure of a generator.
Background
The electric energy is one of secondary energy sources and one of main energy sources in the current society, and is widely applied to various industries. The traditional generator generally adopts a generator structure with an iron core and an inner rotor, has the problems of poor heat dissipation, poor reliability, poor balance and the like, and can gradually not meet the increasing power utilization requirement.
Disclosure of Invention
The invention aims to provide a generator outer rotor structure with good heat dissipation, good balance and high reliability, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an outer rotor structure of a generator, which comprises a rotor main body, a rotor end cover and a plurality of magnetic poles, wherein the rotor main body is of a cylindrical structure, the magnetism of the adjacent magnetic poles is opposite, the magnetic poles are all fixed on the inner wall of the rotor main body, the magnetic poles are all in central symmetry with respect to the axis of the rotor main body, one end of the rotor main body is provided with a side plate, the other end of the rotor main body is fixedly connected with the rotor end cover, the center of the side plate is used for being in transmission connection with a rotating shaft, and a stator of the generator is arranged between the rotating shaft and the magnetic poles.
Preferably, a plurality of grooves are uniformly formed in the inner wall, the groove walls of the grooves are perpendicular to the tangent plane of the inner wall at the bottom of the groove walls, and the magnetic poles are correspondingly arranged in the grooves.
Preferably, the magnetic poles comprise large magnetic steel, first small magnetic steel and second small magnetic steel which are the same in shape, the inner surface and the outer surface of the large magnetic steel, the inner surface and the outer surface of the first small magnetic steel and the second small magnetic steel are arc surfaces, the large magnetic steel, the first small magnetic steel and the second small magnetic steel are arranged along the axial direction of the rotor body, the first small magnetic steel and the second small magnetic steel are arranged at the outer side of the groove, the bottom surface of the groove is an arc surface matched with the outer arc surfaces of the first small magnetic steel and the second small magnetic steel, the polarities of the tightly attached ends of the first small magnetic steel and the second small magnetic steel are the same, the large magnetic steel is arranged at the inner side of the groove, the outer arc surface of the large magnetic steel is matched with the inner arc surfaces of the first small magnetic steel and the second small magnetic steel and is tightly attached to the ends of the first small magnetic steel and the second small magnetic steel, the polarities of the large magnetic steel, the first small magnetic steel and the second small magnetic steel in the adjacent grooves are opposite.
Preferably, the first small magnetic steel and the second small magnetic steel are embedded in the groove, and the large magnetic steel is in interference fit with the groove.
Preferably, the sum of the thicknesses of the large magnetic steel and the first small magnetic steel or the second small magnetic steel is larger than the depth of the groove, and the thicknesses of the first small magnetic steel and the second small magnetic steel are smaller than the depth of the groove.
Preferably, a high magnetic conductive material is arranged between the large magnetic steel in one magnetic pole and the first small magnetic steel or the second small magnetic steel in the adjacent magnetic pole.
Preferably, a plurality of threaded holes are uniformly distributed in the circumferential direction of the end part of the rotor main body, the rotor end cover is fixedly connected with the rotor main body through bolts, one end of each magnetic pole is in contact with the side plate, and the other end of each magnetic pole is in contact with the rotor end cover.
Preferably, a plurality of balance protrusions are uniformly distributed on the edge of the rotor end cover in the circumferential direction.
Compared with the prior art, the invention has the following technical effects:
the structure design of the outer rotor and the inner stator in the invention is beneficial to the heat dissipation of the generator and improves the heat dissipation performance of the generator, and meanwhile, the magnetic poles are distributed in a centrosymmetric manner, and after the rotor runs, the dynamic balance is beneficial to realizing, so that the balance and the reliability of the generator are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an assembly of an outer rotor structure of a generator according to the present invention;
FIG. 2 is an exploded view of the outer rotor structure of the generator of the present invention;
FIG. 3 is a schematic view of the rotor body and magnetic pole attachment of the present invention;
wherein: 1-rotor body, 2-rotor end cover, 3-bolt, 4-balance projection, 5-groove, 6-first small magnetic steel, 7-second small magnetic steel and 8-big magnetic steel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-3: the embodiment provides an outer rotor structure of a generator, which comprises a rotor body 1, a rotor end cover 2 and a plurality of magnetic poles, wherein the rotor body 1 is of a cylindrical structure, the magnetism of adjacent magnetic poles is opposite, the magnetic poles are all fixed on the inner wall of the rotor body 1, a plurality of grooves 5 are uniformly arranged on the inner wall, the groove walls of the grooves 5 are all vertical to the tangent plane of the inner wall at the bottom of the groove wall, so that the grooves 5 with wide outside and narrow inside are formed between the side plates at two sides, the fixing of the magnetic poles is facilitated, specifically shown in fig. 2 and 3, the magnetic poles are correspondingly arranged in the grooves 5 one by one, the magnetic poles are all centrosymmetric about the axis of the rotor body 1, one end of the rotor body 1 is provided with a side plate, the other end of the rotor body 1 is fixedly connected with the rotor end cover 2, a plurality of threaded holes are uniformly distributed in the circumferential direction of the end part of the rotor body 1, and the rotor end cover 2 is fixedly connected with the rotor body 1 by bolts 3, one end of the magnetic pole is contacted with the side plate, the other end of the magnetic pole is contacted with the rotor end cover 2, after the magnetic pole is fixed on the inner wall, the rotor end cover 2 is reused to fix the axial direction of the magnetic pole, the axial float of the magnetic pole in the rotating process is prevented, a plurality of balance protrusions 4 are uniformly distributed on the circumferential direction of the edge of the rotor end cover 2, the size, the number and the positions of the balance protrusions 4 can be selectively set, so that the dynamic balance of the outer rotor structure is further realized, the balance and the reliability of the generator are improved, the center of the side plate is used for being in transmission connection with a rotating shaft to drive the outer rotor structure to rotate, a stator of the generator is arranged between the rotating shaft and the magnetic pole, the arrangement method of the stator in the outer rotor is realized, the heat dissipation is facilitated, and the heat dissipation performance of the generator is improved.
Specifically, the magnetic pole includes a large magnetic steel 8 and a first small magnetic steel 6 and a second small magnetic steel 7 with the same shape, the large magnetic steel 8, the inner surface and the outer surface of the first small magnetic steel 6 and the second small magnetic steel 7 are arc surfaces, the large magnetic steel 8, the first small magnetic steel 6 and the second small magnetic steel 7 are both arranged along the axial direction of the rotor main body 1, that is, the large magnetic steel 8, the lengths of the first small magnetic steel 6 and the second small magnetic steel 7 are both parallel to the axis of the rotor main body 1, in the cross-sectional view shown in fig. 3, the large magnetic steel 8, the first small magnetic steel 6 and the second small magnetic steel 7 are both arranged tangentially to the rotor main body 1, the first small magnetic steel 6 and the second small magnetic steel 7 are both arranged outside the groove 5, the bottom surface of the groove 5 is an arc surface matched with the outer arc surfaces of the first small magnetic steel 6 and the second small magnetic steel 7, the polarities of the first small magnetic steel 6 and the second small magnetic steel 7 close to the ends are the same, the large magnetic steel 8 is arranged inside the groove 5, the extrados of big magnet steel 8 all matches each other and hugs closely with the intrados of first little magnet steel 6 and the little magnet steel 7 of second, the polarity of the intrados of big magnet steel 8 is the same with the polarity that first little magnet steel 6 and the little magnet steel 7 of second hug closely the end, big magnet steel 8 in the adjacent recess 5, the polarity of first little magnet steel 6 and the little magnet steel 7 of second is all opposite, as shown in fig. 2 and 3, thereby make the little magnet steel 7 of second in the magnetic pole and big magnet steel 8 and the adjacent magnetic pole in first little magnet steel 6 with big magnet steel 8 form a closed-loop magnetic circuit, help forming high power density's effective magnetic field. The first small magnetic steel 6 and the second small magnetic steel 7 are both embedded in the groove 5, the large magnetic steel 8 is in interference fit with the groove 5, the sum of the thicknesses of the large magnetic steel 8 and the first small magnetic steel 6 or the second small magnetic steel 7 is greater than the depth of the groove 5, the thicknesses of the first small magnetic steel 6 and the second small magnetic steel 7 are both smaller than the depth of the groove 5, wherein the thicknesses and the depths both refer to the size along the radial direction of the rotor main body 1 to ensure that the first small magnetic steel 6 and the second small magnetic steel 7 are embedded in the groove 5, both sides of the large magnetic steel 8 are in contact with and in interference fit with the groove wall of the groove 5, and the side plates and the rotor end cover 2 are combined to axially fix the large magnetic steel 8, the first small magnetic steel 6 and the second small magnetic steel 7, so that the large magnetic steel 8, the first small magnetic steel 6 and the second small magnetic steel 7 cannot radially or axially float, the stability of the outer rotor structure is improved, and no hole is drilled on the groove 5, the large magnetic steel 8, the first small magnetic steel 6 and the second small magnetic steel 7 are fixed in an interference fit manner and a clamping and fixing manner at two ends, so that magnetic leakage or magnetic loss (mechanical) is avoided.
All be provided with high magnetic material between the little magnet steel 6 of first little magnet steel 6 or the little magnet steel 7 of second in big magnet steel 8 in a magnetic pole and the adjacent magnetic pole, high magnetic material can choose for use silicon steel sheet to improve the magnetic conductivity between little magnet steel 8 of first little magnet steel 6 or the little magnet steel 7 of second and the adjacent magnetic pole, reduce magnetic leakage and magnetic loss.
In the present embodiment, both the inner side and the outer side are defined as the inner side in the perspective of fig. 3, and the center closer to the rotor body 1 is the inner side and the center farther from the rotor body 1 is the outer side.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. The utility model provides a generator outer rotor structure which characterized in that: the magnetic rotor comprises a rotor body, a rotor end cover and a plurality of magnetic poles, wherein the rotor body is of a cylindrical structure, the magnetic poles are opposite and adjacent to each other, the magnetic poles are fixed on the inner wall of the rotor body and are symmetrical with respect to the axis center of the rotor body, a side plate is arranged at one end of the rotor body, the other end of the rotor body is fixedly connected with the rotor end cover, the center of the side plate is used for driving and connecting a rotating shaft, a stator of a generator is arranged between the rotating shaft and the magnetic poles, a plurality of grooves are uniformly formed in the inner wall, the magnetic poles comprise large magnetic steel and first small magnetic steel and second small magnetic steel which are same in shape, the inner surfaces and the outer surfaces of the large magnetic steel, the first small magnetic steel and the second small magnetic steel are arc surfaces, and the large magnetic steel, the first small magnetic steel and the second small magnetic steel are arranged along the axial direction of the rotor body, first little magnet steel with the little magnet steel of second all sets up the outside of recess, the bottom surface of recess be with first little magnet steel with the extrados assorted arc surface of the little magnet steel of second, first little magnet steel with the polarity that the little magnet steel of second hugs closely the end is the same, big magnet steel sets up the inboard of recess, the extrados of big magnet steel with first little magnet steel with the intrados of the little magnet steel of second all matches each other and hugs closely, the polarity of the intrados of big magnet steel with first little magnet steel with the polarity that the little magnet steel of second hugs closely the end is the same, and is adjacent in the recess big magnet steel first little magnet steel with the polarity of the little magnet steel of second is all opposite.
2. The external rotor structure of an electric generator of claim 1, wherein: the groove walls of the grooves are perpendicular to the tangent planes of the inner walls at the bottoms of the groove walls, and the magnetic poles are correspondingly arranged in the grooves.
3. The external rotor structure of an electric generator of claim 1, wherein: the first small magnetic steel and the second small magnetic steel are embedded in the groove, and the large magnetic steel is in interference fit with the groove.
4. The external rotor structure of an electric generator of claim 1, wherein: the thickness sum of the large magnetic steel and the first small magnetic steel or the second small magnetic steel is larger than the depth of the groove, and the thickness sum of the first small magnetic steel and the second small magnetic steel is smaller than the depth of the groove.
5. The external rotor structure of an electric generator of claim 1, wherein: and high magnetic conductive materials are arranged between the large magnetic steel in one magnetic pole and the first small magnetic steel or the second small magnetic steel in the adjacent magnetic pole.
6. The external rotor structure of an electric generator of claim 1, wherein: the end part of the rotor main body is circumferentially and uniformly provided with a plurality of threaded holes, the rotor end cover is fixedly connected with the rotor main body through bolts, one end of each magnetic pole is in contact with the side plate, and the other end of each magnetic pole is in contact with the rotor end cover.
7. The external rotor structure of an electric generator of claim 1, wherein: and a plurality of balance protrusions are uniformly distributed on the edge of the rotor end cover in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262826.0A CN111327137B (en) | 2020-04-07 | 2020-04-07 | Outer rotor structure of generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262826.0A CN111327137B (en) | 2020-04-07 | 2020-04-07 | Outer rotor structure of generator |
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| Publication Number | Publication Date |
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| CN111327137A CN111327137A (en) | 2020-06-23 |
| CN111327137B true CN111327137B (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010262826.0A Active CN111327137B (en) | 2020-04-07 | 2020-04-07 | Outer rotor structure of generator |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112769267A (en) * | 2021-01-21 | 2021-05-07 | 苏州盛亿电机有限公司 | External rotor adopting punching sheet magnetic conduction block |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814788Y (en) * | 2005-08-31 | 2006-09-06 | 河北金星微特电机厂 | Spaced inserting rotor DC brushless motor |
| CN204231101U (en) * | 2014-12-05 | 2015-03-25 | 福建亚南电机有限公司 | A kind of external rotor generator without bearing |
| CN108347113A (en) * | 2018-04-10 | 2018-07-31 | 合肥工业大学 | A kind of permanent magnetic brushless of bilayer combination magnetic pole |
| CN110474508A (en) * | 2019-09-19 | 2019-11-19 | 深圳中菱科技有限公司 | A kind of novel external rotor motor |
-
2020
- 2020-04-07 CN CN202010262826.0A patent/CN111327137B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2814788Y (en) * | 2005-08-31 | 2006-09-06 | 河北金星微特电机厂 | Spaced inserting rotor DC brushless motor |
| CN204231101U (en) * | 2014-12-05 | 2015-03-25 | 福建亚南电机有限公司 | A kind of external rotor generator without bearing |
| CN108347113A (en) * | 2018-04-10 | 2018-07-31 | 合肥工业大学 | A kind of permanent magnetic brushless of bilayer combination magnetic pole |
| CN110474508A (en) * | 2019-09-19 | 2019-11-19 | 深圳中菱科技有限公司 | A kind of novel external rotor motor |
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| CN111327137A (en) | 2020-06-23 |
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