CN203967861U - A kind of permanent magnet machine rotor - Google Patents
A kind of permanent magnet machine rotor Download PDFInfo
- Publication number
- CN203967861U CN203967861U CN201420231813.7U CN201420231813U CN203967861U CN 203967861 U CN203967861 U CN 203967861U CN 201420231813 U CN201420231813 U CN 201420231813U CN 203967861 U CN203967861 U CN 203967861U
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- China
- Prior art keywords
- permanent magnet
- carbon fiber
- rotor
- protective sleeve
- cylinder
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- Expired - Fee Related
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model relates to a kind of permanent magnet machine rotor; comprise the permanent magnet being arranged in rotating shaft; this rotor also comprises carbon fiber colligation cylinder, protective sleeve; described carbon fiber colligation cylinder is coated on the outer surface of permanent magnet; on the surface of carbon fiber colligation cylinder, evenly offer some louvres; described protective sleeve is coated on the outer surface of carbon fiber colligation cylinder, and described carbon fiber colligation cylinder adopts interference fit to be arranged on permanent magnet, and described protective sleeve adopts interference fit to be arranged on carbon fiber colligation cylinder.The utility model adopts carbon fiber colligation jacket casing to be connected on permanent magnet, makes it not produce the loss of high frequency eddy-currents, by offering louvre, avoids because carbon fiber is that hot non-conductor causes the radiating effect of permanent magnet rotor poor; By interference fit, protective sleeve is installed, and certain pretightning force is provided, the huge centrifugal force that permanent magnet is produced can bear rotor High Rotation Speed time.
Description
Technical field
The utility model relates to motor part field, relates in particular to a kind of permanent magnet machine rotor.
Background technology
Rotor is the rotating parts in motor, and motor is comprised of rotor and stator two parts, and it is for realizing the conversion equipment of electric energy and mechanical energy and mechanical energy and electric energy.Rotor is divided into two kinds of internal rotor rotating manner and external rotor rotating manners; Internal rotor rotating manner is that the core body in the middle of motor is rotary body, output torque or income energy, and external rotor rotating manner take motor ectosome as rotary body, and different modes has facilitated the application of various occasions.
At present magneto adopts sintered Nd-Fe-B permanent magnetic material more, and its compression strength is compared with large and tensile strength is very little, and permanent magnet is difficult to the tension stress that the huge centrifugal force of bear rotor High Rotation Speed produces.Sintered NdFeB is a kind of permanent magnetic material that is similar to powder metallurgy, can bear larger compression, but can not bear large tension stress, and its tensile strength is generally lower than 1/10th of compression strength.The huge centrifugal force that permanent magnet is produced cannot bear rotor High Rotation Speed time.At present, be generally that the outer surface at permanent magnet is coated with protective sleeve, but easily produce high-frequency vortex loss.
Utility model content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of permanent magnet machine rotor, and by the non-magnetic protective sleeve of high strength is set, protection rotor adopts carbon fiber colligation belt simultaneously, makes it not produce the loss of high frequency whirlpool.
The utility model is achieved in that
A kind of permanent magnet machine rotor; comprise the permanent magnet being arranged in rotating shaft; this rotor also comprises carbon fiber colligation cylinder, protective sleeve; described carbon fiber colligation cylinder is coated on the outer surface of permanent magnet; on the surface of carbon fiber colligation cylinder, evenly offer some louvres, described protective sleeve is coated on the outer surface of carbon fiber colligation cylinder.
As optimal technical scheme of the present utility model, described carbon fiber colligation cylinder adopts interference fit to be arranged on permanent magnet, and described protective sleeve adopts interference fit to be arranged on carbon fiber colligation cylinder, and certain pretightning force is provided.
As optimal technical scheme of the present utility model, the thickness of described carbon fiber colligation cylinder is less than the thickness of protective sleeve.
Compared with prior art, the beneficial effects of the utility model are: the utility model adopts carbon fiber colligation jacket casing to be connected on permanent magnet, make it not produce the loss of high frequency eddy-currents, by offering louvre, avoid because carbon fiber is that hot non-conductor causes the radiating effect of permanent magnet rotor poor; By interference fit, protective sleeve is installed, and certain pretightning force is provided, the huge centrifugal force that permanent magnet is produced can bear rotor High Rotation Speed time.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1-rotating shaft; 2-permanent magnet; 3-carbon fiber colligation cylinder; 4-louvre; 5-protective sleeve.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, Fig. 1 is structural representation of the present utility model.
Described a kind of permanent magnet machine rotor, comprise the permanent magnet 2 being arranged in rotating shaft 1, permanent magnet 2 adopts resistant to elevated temperatures sintered Nd-Fe-B permanent magnetic material, it is a kind of permanent magnetic material that is similar to powder metallurgy, can bear larger compression, but can not bear large tension stress, its tensile strength is generally lower than 1/10th of compression strength.
This rotor also comprises carbon fiber colligation cylinder 3, protective sleeve 5, and described carbon fiber colligation cylinder 3 adopts interference fit to be coated on the outer surface of permanent magnet 2, makes it not produce the loss of high frequency eddy-currents.On the surface of carbon fiber colligation cylinder 3, evenly offer some louvres 4, preferably, louvre 4 is circular hole, and the distance between adjacent louvre 4 equates.Offering louvre 4 is to avoid because carbon fiber is that hot non-conductor causes the radiating effect of permanent magnet rotor poor.Described protective sleeve 5 is coated on the outer surface of carbon fiber colligation cylinder 3; described protective sleeve 5 adopts high strength non-magnetic conductive steel to make; described protective sleeve 5 adopts interference fit to be arranged on carbon fiber colligation cylinder 3; and provide certain pretightning force, the huge centrifugal force that permanent magnet is produced can bear rotor High Rotation Speed time.
The thickness of described carbon fiber colligation cylinder 3 is less than the thickness of protective sleeve 5.
Rotor design is the key of Design of PM Motor, and the main problem of considering has: the choosing of root diameter and length.Due to square being directly proportional of centrifugal force and rotary speed,, to square being directly proportional of rotor radius, in order to reduce centrifugal force, rotor diameter should be as much as possible little.Yet due to following reason, rotor diameter can not be too little: 1,, in order to produce electromagnetic torque and the power output needing, rotor should have enough space mounting permanent magnets, and stator must have enough large space to lay iron core and winding; 2, rotor should have enough rigidity, thereby rotor can not be too elongated, and diameter and length need to have a suitable ratio.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (3)
1. a permanent magnet machine rotor; comprise the permanent magnet (2) being arranged in rotating shaft (1); it is characterized in that: also comprise carbon fiber colligation cylinder (3), protective sleeve (5); described carbon fiber colligation cylinder (3) is coated on the outer surface of permanent magnet (2); on the surface of carbon fiber colligation cylinder (3), evenly offer some louvres (4), described protective sleeve (5) is coated on the outer surface of carbon fiber colligation cylinder (3).
2. a kind of permanent magnet machine rotor according to claim 1; it is characterized in that: described carbon fiber colligation cylinder (3) adopts interference fit to be arranged on permanent magnet (2); described protective sleeve (5) adopts interference fit to be arranged on carbon fiber colligation cylinder (3), and certain pretightning force is provided.
3. a kind of permanent magnet machine rotor according to claim 1, is characterized in that: the thickness of described carbon fiber colligation cylinder (3) is less than the thickness of protective sleeve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231813.7U CN203967861U (en) | 2014-05-08 | 2014-05-08 | A kind of permanent magnet machine rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231813.7U CN203967861U (en) | 2014-05-08 | 2014-05-08 | A kind of permanent magnet machine rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203967861U true CN203967861U (en) | 2014-11-26 |
Family
ID=51928405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420231813.7U Expired - Fee Related CN203967861U (en) | 2014-05-08 | 2014-05-08 | A kind of permanent magnet machine rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203967861U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638996A (en) * | 2017-10-05 | 2019-04-16 | 发那科株式会社 | Rotor, rotating electric machine and the manufacturing method for covering cylinder |
-
2014
- 2014-05-08 CN CN201420231813.7U patent/CN203967861U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638996A (en) * | 2017-10-05 | 2019-04-16 | 发那科株式会社 | Rotor, rotating electric machine and the manufacturing method for covering cylinder |
| CN109638996B (en) * | 2017-10-05 | 2023-03-07 | 发那科株式会社 | Rotor, rotating electrical machine, and method for manufacturing covering tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20150508 |
|
| EXPY | Termination of patent right or utility model |