CN102118074A - Rotor of permanent-magnet DC motor - Google Patents
Rotor of permanent-magnet DC motor Download PDFInfo
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- CN102118074A CN102118074A CN2011100576563A CN201110057656A CN102118074A CN 102118074 A CN102118074 A CN 102118074A CN 2011100576563 A CN2011100576563 A CN 2011100576563A CN 201110057656 A CN201110057656 A CN 201110057656A CN 102118074 A CN102118074 A CN 102118074A
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Abstract
The invention relates to a rotor of a permanent-magnet DC motor, in particular to a rotor of a permanent-magnet DC brushless motor. The rotor comprises a rotating shaft, a position-limiting left check ring, disc-shaped silicon-steel sheets, magnetic steels and a position-limiting right check ring, wherein an iron core is fixed on the rotating shaft; the permanent magnet is formed by assembling the magnetic steels with the same polarities and specifications together, and the magnetic steels are bonded with the iron core through a binder; the position-limiting left check ring and the position-limiting right check ring are axially arranged at two ends of the permanent magnet and fixedly connected with the rotating shaft. The rotor provided by the invention solves the problems as follows: the rotor is subject to over-high temperature because the permanent-magnet DC motor can not dissipate heat timely and effectively; and the magnetic steels of the rotor are so hot that irreversible demagnetization is generated.
Description
Technical field
The present invention relates to a kind of permanent direct-current electric machine rotor, especially relate to a kind of non-brush permanent-magnet DC motor rotor.
Background technology
At present, the permanent magnet of permanent direct-current electric machine rotor generally is fixed on the rotor core by binding agent.Rotor will produce bigger heat when machine operation, and will be especially obvious in the motor especially higher at rotating speed, that power is bigger.If can't timely and effectively heat be shed, temperature of rotor will cause the irreversible demagnetization of permanent magnet above the working limit of permanent magnet, in a single day permanent magnet forms that irreversible demagnetization will make that motor speed is higher, efficient reduction, power, moment of torsion reduce, bigger heat will be produced, thereby enter vicious circle, motor was lost efficacy.Simultaneously high temperature also will cause the bonding agent ageing failure that permanent magnet is dropped to cause motor to lose efficacy.The heat how effectively rotor to be produced sheds and protects permanent magnet to be in the important topic that safe operating state is a magneto.And if the permanent magnet machine rotor axial pole is made of the magnet steel of polylith same polarity, when magnet thickness is thicker, mutual repulsion also will be bigger, just can't guarantee its axial compactness by bonding agent, easily produce bigger gap during installation between the magnet steel, have a strong impact on motor performance.
Summary of the invention
The purpose of this invention is to provide a kind of permanent direct-current electric machine rotor, the invention solves existing permanent magnet DC motor and can't timely and effectively heat be shed and make temperature of rotor too high, and rotor magnetic steel is because of the overheated problem that causes irreversible demagnetization.
Permanent direct-current electric machine rotor of the present invention, the permanent direct-current electric machine rotor is made of secured core in the rotating shaft 1 rotating shaft 1, left limit back-up ring 2, discoid silicon steel sheet 4, magnet steel 5 and right limit back-up ring 7, permanent magnet is combined into by the magnet steel 5 of same polarity same specification, and magnet steel 5 is bonding by binding agent 6 and iron core; The permanent magnet two ends are provided with axial left limit back-up ring 2 and right limit back-up ring 7, and left limit back-up ring 2 is fixedlyed connected with rotating shaft 1 with right limit back-up ring 7.
Further, permanent direct-current electric machine rotor of the present invention also has following characteristics: iron core is built up by discoid silicon steel sheet 4, is evenly equipped with circular hole on each discoid silicon steel sheet 4, discoid silicon steel sheet 4 rotates folded system successively, and circular hole forms oblique through hole 4-1 on iron core.
Also distinguish porosely 9 on left limit back-up ring 2 and the right limit back-up ring 7, hole 9 sizes, position are consistent with through hole 4-1.
The permanent magnet pole outer surface has oxidation resistant coating 3.
On described left limit back-up ring 2 and right limit back-up ring 7 excircles spacing ring washer flabellum 8 is arranged.
Described spacing back-up ring is to be formed by non-magnetic conductive metal materials processing.
By going heavy method that rotor is smoothed weighing apparatus to left limit back-up ring 2 and 7 employings of right limit back-up ring.
Permanent direct-current electric machine rotor advantage of the present invention is: because permanent magnet pole axially is made up of the magnet steel of multi-disc same polarity same specification, with adopt the monolithic magnet steel to compare can to reduce temperature of rotor, effectively solve rotor magnetic steel because of the overheated irreversible demagnetization problem that causes, and can reduce the processing technology difficulty of magnet steel, improve the machining accuracy of magnet steel.Be located at the most left and the most spacing back-up ring at right two ends of magnetic pole, can prevent to produce bigger gap between magnet steel, make the magnet steel axial restraint closely accurately and reliably.Spacing back-up ring is to be formed by the relatively large metal material processing of the density of non-magnetic conduction, is provided with flabellum above the spacing back-up ring, can strengthen inner air during machine operation and flow, and improves the rotor heat-sinking capability.Rotor core is provided with uniform hole, and builds up by certain anglec of rotation degree, no matter motor steering how, all can improve the motor internal speed air flow, and has increased the rotor core area of dissipation simultaneously, has improved the rotor heat-sinking capability.The permanent magnet pole outer surface is provided with the antioxidant defense coating, has effectively delayed the oxidation of magnet steel, has prolonged electrical machinery life.
Description of drawings
Fig. 1 is a perspective view of the present invention;
Fig. 2 is a cutaway view of the present invention.
Symbol description among the figure: rotating shaft 1, left limit back-up ring 2, oxidation resistant coating 3, discoid silicon steel sheet 4, through hole 4-1, magnet steel 5, binding agent 6, right limit back-up ring 7, spacing ring washer flabellum 8, hole 9.
Embodiment
Below in conjunction with accompanying drawing and with illustrated embodiments the present invention is done detailed explanation.
Consult Fig. 1-Fig. 2, the permanent direct-current electric machine rotor, the permanent direct-current electric machine rotor, constitute by rotating shaft 1, left limit back-up ring 2, discoid silicon steel sheet 4, magnet steel 5 and right limit back-up ring 7, secured core in the rotating shaft 1, permanent magnet is combined into by the magnet steel 5 of same polarity same specification, and magnet steel 5 is bonding by binding agent 6 and iron core; The permanent magnet two ends are provided with axial left limit back-up ring 2 and right limit back-up ring 7, and left limit back-up ring 2 is fixedlyed connected with rotating shaft 1 with right limit back-up ring 7.
Further, permanent direct-current electric machine rotor of the present invention also has following characteristics: iron core is built up by discoid silicon steel sheet 4, is evenly equipped with circular hole on each discoid silicon steel sheet 4, discoid silicon steel sheet 4 rotates folded system successively, and circular hole forms oblique through hole 4-1 on iron core.
Also distinguish porosely 9 on left limit back-up ring 2 and the right limit back-up ring 7, hole 9 sizes, position are consistent with through hole 4-1.
The permanent magnet pole outer surface has oxidation resistant coating 3.
On described left limit back-up ring 2 and right limit back-up ring 7 excircles spacing ring washer flabellum 8 is arranged.
Described spacing back-up ring is to be formed by non-magnetic conductive metal materials processing.
By going heavy method that rotor is smoothed weighing apparatus to left limit back-up ring 2 and 7 employings of right limit back-up ring.
Be provided with a plurality of uniform holes in the described discoid silicon steel sheet, armature spindle is fixed together discoid silicon steel sheet by certain anglec of rotation.Owing to increased the area of dissipation of rotor, reduce the temperature of rotor, and reduced the quality of rotor, improved motor sensitivity.This discoid silicon steel sheet is fixed together by certain anglec of rotation, can improve the motor internal speed air flow when machine operation, effectively improves the heat-sinking capability of rotor.
Described spacing back-up ring is provided with flabellum.Can make the motor internal more uniform temperature, prevent that the situation of local overheating from taking place, and can reduce the temperature of winding.Spacing back-up ring is formed by the relatively large metal material processing of the density of non-magnetic conduction, can directly smooth weighing apparatus to rotor by going heavy method, makes the rotor running more steady, improves the combination property of motor.
Described permanent magnet pole outer surface is provided with the antioxidant defense coating, can improve the oxidation resistance of magnet steel, prolongs motor useful life.
Above embodiment is more preferably embodiment a kind of of the present invention, the common variation that those skilled in the art carry out in the technical program scope and replace and should be included in protection scope of the present invention.
Claims (7)
1. permanent direct-current electric machine rotor, constitute by rotating shaft (1), left limit back-up ring (2), discoid silicon steel sheet (4), magnet steel (5) and right limit back-up ring (7), it is characterized in that, secured core is gone up in rotating shaft (1), permanent magnet is combined into by the magnet steel (5) of same polarity same specification, and magnet steel (5) is bonding by binding agent (6) and iron core; The permanent magnet two ends are provided with axial left limit back-up ring (2) and right limit back-up ring (7), and left limit back-up ring (2) is fixedlyed connected with rotating shaft (1) with right limit back-up ring (7).
2. permanent direct-current electric machine rotor according to claim 1, it is characterized in that iron core is built up by discoid silicon steel sheet (4), be evenly equipped with circular hole on each discoid silicon steel sheet (4), discoid silicon steel sheet (4) rotates folded system successively, and circular hole forms oblique through hole (4-1) on iron core.
3. as permanent direct-current electric machine rotor as described in the claim 2, it is characterized in that on left limit back-up ring (2) and the right limit back-up ring (7) also porose respectively (9), hole (9) size, position are consistent with through hole (4-1).
4. permanent direct-current electric machine rotor according to claim 1 is characterized in that the permanent magnet pole outer surface has oxidation resistant coating (3).
5. permanent direct-current electric machine rotor according to claim 1 is characterized in that on described left limit back-up ring (2) and right limit back-up ring (7) excircle spacing ring washer flabellum (8) being arranged.
6. permanent direct-current electric machine rotor according to claim 1 is characterized in that described spacing back-up ring is to be formed by non-magnetic conductive metal materials processing.
7. permanent direct-current electric machine rotor according to claim 1 is characterized in that, goes heavy method that rotor is smoothed weighing apparatus by left limit back-up ring (2) and right limit back-up ring (7) are adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100576563A CN102118074A (en) | 2011-03-11 | 2011-03-11 | Rotor of permanent-magnet DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100576563A CN102118074A (en) | 2011-03-11 | 2011-03-11 | Rotor of permanent-magnet DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102118074A true CN102118074A (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100576563A Pending CN102118074A (en) | 2011-03-11 | 2011-03-11 | Rotor of permanent-magnet DC motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN102118074A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883023A (en) * | 2014-11-26 | 2015-09-02 | 广东美的环境电器制造有限公司 | DC brushless motor |
| CN110429783A (en) * | 2019-08-30 | 2019-11-08 | 深圳市力辉电机有限公司 | Non-brush permanent-magnet DC motor structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001025209A (en) * | 1999-07-05 | 2001-01-26 | Nissan Motor Co Ltd | Rotor of motor |
| CN101098091A (en) * | 2006-12-28 | 2008-01-02 | 刘连兵 | Permanent-magnet arc welding alternator rotor |
| CN201160241Y (en) * | 2008-01-08 | 2008-12-03 | 李金东 | Permanent-magnet DC electric motor rotor |
| CN201490787U (en) * | 2009-09-03 | 2010-05-26 | 钻宝电子有限公司 | Rotor structure of permanent magnet generator |
| CN201928100U (en) * | 2011-03-11 | 2011-08-10 | 李金东 | Rotor of permanent-magnet DC motor |
-
2011
- 2011-03-11 CN CN2011100576563A patent/CN102118074A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001025209A (en) * | 1999-07-05 | 2001-01-26 | Nissan Motor Co Ltd | Rotor of motor |
| CN101098091A (en) * | 2006-12-28 | 2008-01-02 | 刘连兵 | Permanent-magnet arc welding alternator rotor |
| CN201160241Y (en) * | 2008-01-08 | 2008-12-03 | 李金东 | Permanent-magnet DC electric motor rotor |
| CN201490787U (en) * | 2009-09-03 | 2010-05-26 | 钻宝电子有限公司 | Rotor structure of permanent magnet generator |
| CN201928100U (en) * | 2011-03-11 | 2011-08-10 | 李金东 | Rotor of permanent-magnet DC motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883023A (en) * | 2014-11-26 | 2015-09-02 | 广东美的环境电器制造有限公司 | DC brushless motor |
| CN110429783A (en) * | 2019-08-30 | 2019-11-08 | 深圳市力辉电机有限公司 | Non-brush permanent-magnet DC motor structure |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: West Street Phoenix Road Yongkang city Zhejiang province 321300 No. 10 Building 3 unit 1 Room 302 Applicant after: Li Jindong Address before: West Street Phoenix Road Yongkang city Zhejiang province 321300 No. 10 Building 3 unit 1 Room 302 Applicant before: Li Jindong |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110706 |