CN104868625A - Rotor structure of surface-mounted high-speed permanent magnet motor - Google Patents
Rotor structure of surface-mounted high-speed permanent magnet motor Download PDFInfo
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- CN104868625A CN104868625A CN201510264321.7A CN201510264321A CN104868625A CN 104868625 A CN104868625 A CN 104868625A CN 201510264321 A CN201510264321 A CN 201510264321A CN 104868625 A CN104868625 A CN 104868625A
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- protective sleeve
- permanent magnet
- rotor
- rotor structure
- end flange
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Abstract
The invention discloses a rotor structure of a surface-mounted high-speed permanent magnet motor. The structure comprises a protective sleeve, a rotor core, a rotating shaft and a permanent magnet. Two ends of the rotor core are provided with two flanges respectively. Two ends of the protective sleeve are symmetrically provided with a plurality of limiting keys along a circumferential direction. The flanges are provided with a plurality of limiting grooves which are cooperated with the limiting keys. According to the rotor structure of the invention, the keys which are arranged on two ends of the protective sleeve are cooperated with the grooves on the left end flange and the right end flange so as to limit circumferential and axial movement of the protective sleeve under a working state; fixation of the permanent magnet is reliable; a temperature of the protective sleeve during shrinkage fit is reduced and installation is simple and convenient. The keys of the two ends of the protective sleeve, which exceed external end surfaces of the left end flange and the right end flange, enhance a heat dissipation effect of airflow. Because of circumferential grooves on an external surface of the protective sleeve, eddy-current losses are reduced and a cooling effect of a rotor is increased. The grooves are symmetrically distributed on the external surface of the protective sleeve along a circumferential direction so that the rotor possesses good initial equilibrium.
Description
Technical field
The invention belongs to magneto technical field, be specifically related to a kind of rotor structure of surface-mount type high-speed permanent magnet motor.
Background technology
On surface-mount type high speed permanent magnet motor rotor, permanent magnet is reliable fixing most important for the normal operation of high-speed permanent magnet motor.Surface-mount type high-speed permanent magnet motor is in work process, epitrochanterian permanent magnet subjects the effect of huge centrifugal force, come off in running to prevent permanent magnet, circumference and to move axially etc. has a strong impact on the problem that motor normally runs and occur, need to fix reliably permanent magnet.The mode that the permanent magnet that current surface-mount type high-speed permanent magnet motor is relatively commonly used is fixed is by high-strength alloy or the composite material protective sleeve hot jacket outer surface at permanent magnet.In order to ensure that rotor is at high-speed rotation, permanent magnet being protected and prevents from circumference and axial movement occur between protective sleeve, permanent magnet, rotor core, between claimed cover inner surface and permanent magnet outer surface, the enough large magnitude of interference will be had.If the magnitude of interference between protective sleeve inner surface and permanent magnet outer surface is too little; rotor is in high-speed rotation; protective sleeve possibly cannot protect that circumference will occur between permanent magnet or protective sleeve, permanent magnet, rotor core is mobile; this not only can affect the reliability of rotor, but also brings many problems can to the control of motor.If the magnitude of interference between protective sleeve inner surface and permanent magnet outer surface is excessive, during hot jacket protective sleeve, the heating-up temperature of protective sleeve is also higher.If the heating-up temperature of protective sleeve is too high, hot jacket process can be caused very difficult on the one hand, the performance of the too high meeting of temperature on permanent magnet of protective sleeve produces certain impact on the other hand, even can cause permanent magnet loss of excitation or break.
Publication number is the protective sleeve that the Chinese patent of CN 101316058A proposes a kind of high speed permanent magnet motor rotor; its even circumferential along rotor protection cover outer surface is distributed with multiple groove overlapping centerline axis parallel with rotor protection; rotor protection cover both ends of the surface are uniformly distributed multiple protruding block, to reduce the eddy current loss of protective sleeve and to strengthen the cooling capacity of rotor.But; there is problem that is circumferential and that move axially between protective sleeve, permanent magnet, rotor core when this structure does not solve that between protective sleeve and permanent magnet, the magnitude of interference is less; when not solving that between protective sleeve and permanent magnet, the magnitude of interference is larger yet; protective sleeve heating-up temperature is high, the problem causing permanent magnet loss of excitation or break.
Publication number is that CN 104377859 A Chinese patent proposes a kind of high speed permanent magnet motor rotor; its rotor cooling duct is opened in spindle central place; water or wet goods coolant is passed in cooling duct; protective sleeve is half permeability alloys protective sleeve, evenly offers a helicla flute along protective sleeve outer surface.But; the helicla flute of the protective sleeve outer surface shown in this patent is a non-straight-through groove; the flow behavior of gas is poor, and wind is also difficult to enter from protective sleeve outer surface helicla flute porch, and inappropriate helicla flute design can make the initial unbalance of rotor increase in addition.
Summary of the invention
For the above-mentioned technical problem existing for prior art; the invention provides a kind of rotor structure of surface-mount type high-speed permanent magnet motor; this rotor structure reduces temperature during sheath hot jacket; permanent magnet is fixed reliably, it is simple and convenient to install; effectively can prevent the problem that motor between protective sleeve, permanent magnet, rotor core, circumference occurs when high-speed cruising and moves axially; improve the reliability of working rotor; reduce epitrochanterian eddy current loss and the radiating effect enhancing gas, reduce temperature when high speed rotor of motor runs.
A rotor structure for surface-mount type high-speed permanent magnet motor, comprising: protective sleeve, rotor core, rotating shaft and permanent magnet; Described rotor core two ends are respectively equipped with two flanges, and described protective sleeve two ends have circumferentially all been arranged symmetrically with multiple positive stop key, described flange have multiple stopper slot coordinated with positive stop key; Can limit like this protective sleeve in working order under circumference and move axially.
Further, described protective sleeve two ends positive stop key exceeds the outer face of left end flange and right-hand member flange respectively; The flowing of air-flow can be strengthened, improve the thermolysis of gas.
Further, number and the shape of the positive stop key at described protective sleeve two ends can be identical or different, and the sideline of described positive stop key is straight line or curve.
Further, described protective sleeve outer surface vertically and circumference all have multiple groove angled with protective sleeve bus; Not only can block the eddy current loop in protective sleeve; reduce the eddy current loss in protective sleeve; and protective sleeve two ends exceed the key of left end flange and right-hand member flange outer face and variable cross section groove when High Rotation Speed, form spiral air flow and air pressure, add the radiating effect of air-flow.
Further, the sideline of described groove is straight line or curve, and the sectional area of groove is constant or gradually change vertically.
Further, described groove is circumferentially symmetrical; Groove distributes symmetrically in protective sleeve outer surface circumference, ensure that rotor has good initial balance.
Rotor structure of the present invention by arrange at protective sleeve two ends key to match with the groove on left end flange and right-hand member flange limit protective sleeve in working order under circumference and move axially, permanent magnet is fixing reliable; Temperature when reducing protective sleeve hot jacket, install more simple and convenient; Protective sleeve two ends exceed the key of left end flange and right-hand member flange outer face, enhance the thermolysis of air-flow; The circumferential recess of the outer surface of protective sleeve reduces the cooling effect that eddy current loss enhances rotor; The symmetrically distribution of groove in protective sleeve outer surface circumference ensure that rotor has good initial balance.
Accompanying drawing explanation
Fig. 1 (a) is for the present invention is with the surface-mount type high speed permanent magnet motor rotor section of structure of two flanges.
Fig. 1 (b) is for the present invention is with the surface-mount type high speed permanent magnet motor rotor structure side view of two flanges.
Fig. 2 is that the present invention is only with the surface-mount type high speed permanent magnet motor rotor structural representation of end flange.
Embodiment
In order to more specifically describe the present invention, below in conjunction with the drawings and the specific embodiments, technical scheme of the present invention is described in detail.
Embodiment 1
As shown in Figure 1, rotating shaft 1, rotor core 2, permanent magnet 3, protective sleeve 4, left end flange 5 and right-hand member flange 6 is comprised.The two ends circumference of protective sleeve 4 is distributed with multiple key 7 exceeding left end flange 5 and right-hand member flange 6 outer face symmetrically; also with the groove 8 matched with the key 7 at protective sleeve 4 two ends on left end flange 5 and right-hand member flange 6, the circumference of the outer surface of protective sleeve 4 is evenly distributed with multiple groove 9 angled with the bus of protective sleeve 4.Rotor core 2, left end flange 5 and right-hand member flange 6 are enclosed within rotating shaft 1; and carry out axial location with the step of axle upper left side; permanent magnet 3 is enclosed within the cylindrical of rotor core 2 between left end flange 5 and right-hand member flange 6, and protective sleeve 4 is enclosed within permanent magnet 3 and left end flange 5 and right-hand member flange 6.
During installation; first left end flange 5 and rotor core 2 are enclosed within rotating shaft 1; and carry out axial location with the step of axle upper left side; secondly permanent magnet 3 is fixed on the outer end of rotor core 2; then the aligned in position of groove 8 on the position of protective sleeve 4 left end key 5 and left end flange 5; protective sleeve 4 is enclosed within left end flange 5 and permanent magnet 3, finally again the aligned in position of the position of groove 8 on left end flange 5 and protective sleeve 4 right-hand member key 7, right-hand member flange 6 is enclosed within rotating shaft 1 and protective sleeve 4.
The key at protective sleeve 4 two ends matches with the groove 8 on left end flange 5 and right-hand member flange 6, the circumference that restriction protective sleeve 4 is lower in working order and move axially, permanent magnet is reliably fixing, temperature when reducing protective sleeve 4 hot jacket, install more convenient; The key that protective sleeve 4 two ends exceed left end flange 5 and right-hand member flange 6 outer face when machine operation, enhances the flowing of air-flow, improves thermolysis as the fan blade of fan.Groove 9 in protective sleeve 4 outer surface circumference reduces eddy current loss, enhances the cooling effect of rotor; Groove 9 distributes symmetrically and ensure that rotor has good initial balance in protective sleeve 4 outer surface circumference.
Embodiment 2
As shown in Figure 2, comprise rotating shaft 1, rotor core 2, permanent magnet 3, protective sleeve 4, left end flange 5 and right-hand member flange 6, design a step at the left end of rotor core 2 installation site, form left end flange 5.The two ends circumference of protective sleeve 4 is distributed with multiple key 7 exceeding left end flange 5 and right-hand member flange 6 outer face symmetrically; left end flange 5 and right-hand member flange 6 also design the groove 8 matched with the key 7 at protective sleeve 4 two ends, and the circumference of the outer surface of protective sleeve 4 is evenly distributed with multiple groove 9 angled with the bus of protective sleeve 4.
During installation; first rotor core 2 is enclosed within rotating shaft 1; and carry out axial location by the upper left end flanges 5 of axle; permanent magnet 3 overlaps on the cylindrical of rotor core 2; by the aligned in position of groove 8 on the position of protective sleeve 4 left end key 7 and left end flange 5; protective sleeve 4 is enclosed within left end flange 5 and permanent magnet 3, then the aligned in position of the position of groove 8 on left end flange 5 and protective sleeve 4 right-hand member key 7, right-hand member flange 6 is enclosed within rotating shaft 1 and protective sleeve 4.
Above-mentioned is can understand and apply the invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to above-described embodiment, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art are according to announcement of the present invention, and the improvement made for the present invention and amendment all should within protection scope of the present invention.
Claims (6)
1. a rotor structure for surface-mount type high-speed permanent magnet motor, comprising: protective sleeve, rotor core, rotating shaft and permanent magnet; It is characterized in that: described rotor core two ends are respectively equipped with two flanges, described protective sleeve two ends have circumferentially all been arranged symmetrically with multiple positive stop key, described flange have multiple stopper slot coordinated with positive stop key.
2. rotor structure according to claim 1, is characterized in that: described protective sleeve two ends positive stop key exceeds the outer face of left end flange and right-hand member flange respectively.
3. rotor structure according to claim 1, is characterized in that: number and the shape of the positive stop key at described protective sleeve two ends can be identical or different, and the sideline of described positive stop key is straight line or curve.
4. rotor structure according to claim 1, is characterized in that: described protective sleeve outer surface vertically and circumference all have multiple groove angled with protective sleeve bus.
5. rotor structure according to claim 4, is characterized in that: the sideline of described groove is straight line or curve, and the sectional area of groove is constant or gradually change vertically.
6. rotor structure according to claim 4, is characterized in that: described groove is circumferentially symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264321.7A CN104868625A (en) | 2015-05-21 | 2015-05-21 | Rotor structure of surface-mounted high-speed permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510264321.7A CN104868625A (en) | 2015-05-21 | 2015-05-21 | Rotor structure of surface-mounted high-speed permanent magnet motor |
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| Publication Number | Publication Date |
|---|---|
| CN104868625A true CN104868625A (en) | 2015-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510264321.7A Pending CN104868625A (en) | 2015-05-21 | 2015-05-21 | Rotor structure of surface-mounted high-speed permanent magnet motor |
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| CN (1) | CN104868625A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979110A (en) * | 2017-05-04 | 2017-07-25 | 柳州源创电喷技术有限公司 | Gasoline engine in-cylinder direct-jet fuel injector |
| CN108711981A (en) * | 2018-07-26 | 2018-10-26 | 珠海格力电器股份有限公司 | Rotor structure, motor and assembly method of rotor structure |
| CN112803634A (en) * | 2021-01-04 | 2021-05-14 | 擎能动力科技(苏州)有限公司 | Ultrahigh-speed motor, electric air compressor and new energy automobile |
| CN113039702A (en) * | 2018-11-15 | 2021-06-25 | 德马吉森精机株式会社 | Rotor |
Citations (6)
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| CN2786861Y (en) * | 2005-02-02 | 2006-06-07 | 核工业理化工程研究院华核新技术开发公司 | Rare earth permanent-magnetic brushless direct current motor |
| US7183683B2 (en) * | 2005-06-23 | 2007-02-27 | Peopleflo Manufacturing Inc. | Inner magnet of a magnetic coupling |
| CN202231514U (en) * | 2011-09-06 | 2012-05-23 | 徐州工业职业技术学院 | Protective device of magnetoelectric machine rotor |
| CN202798218U (en) * | 2012-08-28 | 2013-03-13 | 河北电机股份有限公司 | High-speed permanent-magnet synchronous motor |
| CN104638788A (en) * | 2015-02-04 | 2015-05-20 | 浙江大学 | Rotor sheath of high-speed permanent magnet motor |
| CN204761186U (en) * | 2015-05-21 | 2015-11-11 | 浙江大学 | High -speed permanent -magnet machine's of table formula of pasting rotor structure |
-
2015
- 2015-05-21 CN CN201510264321.7A patent/CN104868625A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2786861Y (en) * | 2005-02-02 | 2006-06-07 | 核工业理化工程研究院华核新技术开发公司 | Rare earth permanent-magnetic brushless direct current motor |
| US7183683B2 (en) * | 2005-06-23 | 2007-02-27 | Peopleflo Manufacturing Inc. | Inner magnet of a magnetic coupling |
| CN202231514U (en) * | 2011-09-06 | 2012-05-23 | 徐州工业职业技术学院 | Protective device of magnetoelectric machine rotor |
| CN202798218U (en) * | 2012-08-28 | 2013-03-13 | 河北电机股份有限公司 | High-speed permanent-magnet synchronous motor |
| CN104638788A (en) * | 2015-02-04 | 2015-05-20 | 浙江大学 | Rotor sheath of high-speed permanent magnet motor |
| CN204761186U (en) * | 2015-05-21 | 2015-11-11 | 浙江大学 | High -speed permanent -magnet machine's of table formula of pasting rotor structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979110A (en) * | 2017-05-04 | 2017-07-25 | 柳州源创电喷技术有限公司 | Gasoline engine in-cylinder direct-jet fuel injector |
| CN108711981A (en) * | 2018-07-26 | 2018-10-26 | 珠海格力电器股份有限公司 | Rotor structure, motor and assembly method of rotor structure |
| CN108711981B (en) * | 2018-07-26 | 2024-04-05 | 珠海格力电器股份有限公司 | Rotor structure, motor and assembly method of rotor structure |
| CN113039702A (en) * | 2018-11-15 | 2021-06-25 | 德马吉森精机株式会社 | Rotor |
| CN112803634A (en) * | 2021-01-04 | 2021-05-14 | 擎能动力科技(苏州)有限公司 | Ultrahigh-speed motor, electric air compressor and new energy automobile |
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Application publication date: 20150826 |
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| RJ01 | Rejection of invention patent application after publication |