CN110401279B - Shaft-sleeve integrated high-speed permanent magnet motor rotor and assembling method - Google Patents
Shaft-sleeve integrated high-speed permanent magnet motor rotor and assembling method Download PDFInfo
- Publication number
- CN110401279B CN110401279B CN201910618909.6A CN201910618909A CN110401279B CN 110401279 B CN110401279 B CN 110401279B CN 201910618909 A CN201910618909 A CN 201910618909A CN 110401279 B CN110401279 B CN 110401279B
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- CN
- China
- Prior art keywords
- sleeve
- magnetic steel
- mandrel
- permanent magnet
- motor rotor
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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
-
- 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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Abstract
The invention belongs to the technical field of motors, and relates to a shaft-sleeve integrated high-speed permanent magnet motor rotor and an assembly method. Comprises a shaft sleeve (3), a magnetic steel end cover (4), magnetic steel (5) and a mandrel (6); the invention adopts a structure that the protective sleeve and the shaft sleeve are integrated, effectively provides the rigidity of the motor rotor, and simultaneously, the mandrel penetrates through the shaft sleeve, and the application of axial pretightening force is ensured through the locking nut, so that the magnetic steel assembled between the shaft sleeve and the mandrel can be restrained by axial force. Under the condition of higher rotating speed operation of the motor, the integral rigidity of the rotor can be effectively improved due to the existence of axial pretightening force, so that the structural stability of the motor rotor is improved. The structure of the invention combines the protective sleeve and the mandrel at one end into a whole, improves the rigidity of the rotor, simultaneously, the mandrel at the other end plays a role of a pull rod, the application of axial pretightening force is effectively ensured through the locking nut, no additional part is required, the structure is simple, and the reliability is high.
Description
Technical Field
The invention belongs to the technical field of motors; relates to a high-speed permanent magnet motor rotor; in particular to a high-speed permanent magnet motor rotor with an integrated shaft sleeve and an assembling method.
Background
The general high-speed permanent magnet motor rotor adopts structures such as independent straight cylindric protective sheath fastening magnet steel, and the motor is under higher rotational speed operation, because the effect of centrifugal force, has the possibility of protective sheath and magnet steel separation, leads to the whole rigidity of rotor to descend, influences motor rotor's structural stability.
Disclosure of Invention
The purpose of the invention is as follows: the invention adopts a structure that the protective sleeve and the shaft sleeve are integrated, effectively provides the rigidity of the motor rotor, and simultaneously, the mandrel penetrates through the shaft sleeve, and the application of axial pretightening force is ensured through the locking nut, so that the magnetic steel assembled between the shaft sleeve and the mandrel can be restrained by axial force. Under the condition of higher rotating speed operation of the motor, the integral rigidity of the rotor can be effectively improved due to the existence of axial pretightening force, so that the structural stability of the motor rotor is improved.
The technical scheme of the invention is as follows: a shaft sleeve integrated high-speed permanent magnet motor rotor is characterized by comprising a shaft sleeve 3, a magnetic steel end cover 4, magnetic steel 5 and a mandrel 6; the magnetic steel 5 and the magnetic steel end cover 4 are sequentially assembled on the mandrel 6, an adhesive is coated on a joint surface to form a combined body, the combined body is integrally assembled in the shaft sleeve 3, the combined body is in interference fit with the shaft sleeve 3, a certain axial pre-tightening tension is applied to the left end of the mandrel 6, and axial fixing is completed through a fastener.
The shaft sleeve 3 comprises a left end shaft head 3b and a magnetic steel protective sleeve 3d, the left end shaft head 3b is provided with a bearing installation surface 3a, and the size of the inner cylindrical surface of the magnetic steel protective sleeve 3d is in interference fit with the outer cylindrical surface of the magnetic steel 5.
The left end shaft head 3b is provided with an air pressure balance hole 3c for communicating an inner cavity formed by the shaft sleeve 3, the magnetic steel end cover 4 and the mandrel 6 with the outside.
The mandrel 6 comprises a rotor mandrel 6d and a right-end shaft head 6f, the rotor mandrel 6d is provided with an internal thread 6a and an external thread 6b, the right-end shaft head 6f is provided with an annular groove 6e and a bearing mounting surface 6g, and the rotor mandrel 6d and the right-end shaft head 6f share a central hole 6 c.
And a right end shaft head 6f is arranged at the joint of the rotor mandrel 6d and the right end shaft head 6 f.
The invention has the following effects: compared with a straight-barrel-shaped protective sleeve adopted by a general high-speed permanent magnet motor rotor, the high-speed permanent magnet motor rotor has the advantages that the protective sleeve and the mandrel at one end are combined into a whole, the rigidity of the rotor is improved, meanwhile, the mandrel at the other end plays a role of a pull rod, the application of axial pretightening force is effectively guaranteed through the locking nut, no additional part is needed, the structure is simple, and the reliability is high.
Drawings
Figure 1 is a cross-sectional view of the present invention,
figure 2 a sectional view of the sleeve 3 according to the invention,
figure 3 is a cross-sectional view of the mandrel 6 of the present invention.
Detailed Description
Detailed description: the high-speed permanent magnet motor rotor is shown in the attached figure 1 and is composed of a locking nut 1, a disc spring 2, a shaft sleeve 3, a magnetic steel end cover 4, magnetic steel 5 and a mandrel 6, and the structure is simple. Firstly, the magnetic steel 5 is assembled on the mandrel 6, the bonding surface is coated with an adhesive, then, the magnetic steel end cover 4 is assembled on the mandrel 6, the right end surface of the magnetic steel end cover 4 is attached to the left end surface of the magnetic steel 5, and the bonding surface is coated with the adhesive, so that a combined body is formed. Then, the shaft sleeve 3 is heated and then sleeved outside the combined body, and the shaft sleeve 3 and the combined body are in interference fit. Finally, the disc spring 2 and the lock nut 1 are sequentially arranged at the left end of the mandrel 6, and the disc spring 2 generates a certain compression amount in the process of screwing the lock nut 1, so that a certain axial pre-tightening tension is applied to the left end of the mandrel 6. The structural stability of the motor rotor is improved.
The structure of the shaft sleeve 3 is shown in the attached figure 2, a left end shaft head 3b is provided with a bearing mounting surface 3a, and the left end shaft head 3b is provided with an air pressure balance hole 3c, so that an inner cavity formed by the shaft sleeve 3, the magnetic steel end cover 4 and the core shaft 6 in the assembling process is communicated with the outside, and air pressure is balanced. The size of the inner cylindrical surface of the magnetic steel protective sleeve 3d is in interference fit with the outer cylindrical surface of the magnetic steel 5, so that the magnetic steel 5 is prevented from moving relatively under the action of high-speed centrifugal force.
The structure of the mandrel 6 is shown in figure 3, the rotor mandrel 6d is provided with an internal thread 6a and an external thread 6b, when the motor rotor is assembled, the mandrel 6 can be connected with the internal thread 6a to apply axial pre-tightening tension, and the locking nut 1 is matched with the external thread 6b to complete axial fixation of the rotor mandrel 6 d. The rotor core shaft 6d is provided with a center hole 6c, the weight of the motor rotor is reduced, the rigidity is improved, meanwhile, the heat dissipation of the rotor core shaft 6d is facilitated, and cooling media are introduced into the center hole 6c to carry out forced heat dissipation on the rotor core shaft. The right end shaft head 6f is provided with an annular groove 6e, which is beneficial to reducing stress concentration. The right end shaft head 6f is provided with a bearing mounting surface 6 g.
Claims (8)
1. A shaft-sleeve integrated high-speed permanent magnet motor rotor is characterized by comprising a lock nut (1), a disc spring (2), a shaft sleeve (3), a magnetic steel end cover (4), magnetic steel (5) and a mandrel (6); the magnetic steel (5) and the magnetic steel end cover (4) are sequentially assembled on the mandrel (6) to form a combination, the combination is integrally assembled into the shaft sleeve (3), the disc spring (2) and the locking nut (1) are sequentially arranged at the left end of the mandrel (6), the shaft sleeve (3) is of a hollow structure with a step at one end and is divided into two parts, one section with the step is a left end shaft head (3b), the other end of the left end shaft head is a magnetic steel protective sleeve (3d), and the left end shaft head (3b) is provided with an air pressure balance hole (3 c); dabber (6) be the hollow structure that one end has the step, divide into two parts with it, one section that has the step is right-hand member spindle nose (6f), and another section is rotor spindle (6d), right-hand member spindle nose (6f) major diameter end and magnet steel protective sheath (3d) end cooperation, rotor spindle (6d) and left end spindle nose (3b), magnet steel end cover (4), magnet steel (5) cooperation, the total centre bore (6c) of rotor spindle (6d) and right-hand member spindle nose (6 f).
2. The bushing-integrated high-speed permanent magnet motor rotor according to claim 1, wherein the left end shaft head (3b) is provided with a bearing mounting surface (3a), and an inner cylindrical surface of the magnetic steel protective sleeve (3d) is in interference fit with an outer cylindrical surface of the magnetic steel (5).
3. A bushing integrated high speed permanent magnet machine rotor according to claim 1, characterized in that the rotor spindle (6d) has an internal thread (6a), an external thread (6b), and the lock nut (1) is mounted on the external thread (6 b).
4. The bushing-integrated high-speed permanent magnet motor rotor according to claim 1, wherein the right end shaft head (6f) has an annular groove (6 e).
5. The bushing-integrated high-speed permanent magnet motor rotor according to claim 1, wherein the right end shaft head (6f) has a bearing mounting surface (6 g).
6. The method for assembling the sleeve-integrated high-speed permanent magnet motor rotor according to claim 1, wherein the magnetic steel (5) is assembled on the mandrel (6), the bonding surface is coated with an adhesive, the magnetic steel end cover (4) is assembled on the mandrel (6), the right end surface of the magnetic steel end cover (4) is attached to the left end surface of the magnetic steel (5), and the bonding surface is coated with the adhesive to form a combined body; the shaft sleeve (3) is sleeved outside the combination body, and the disc spring (2) and the locking nut (1) are sequentially arranged at the left end of the mandrel (6).
7. The method for assembling a sleeve-in-one high-speed permanent magnet motor rotor according to claim 6, wherein the sleeve (3) and the combined body are in interference fit.
8. The method for assembling a sleeve-integrated high-speed permanent magnet motor rotor according to claim 6, wherein the sleeve (3) is heated and then sleeved outside the assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910618909.6A CN110401279B (en) | 2019-07-09 | 2019-07-09 | Shaft-sleeve integrated high-speed permanent magnet motor rotor and assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910618909.6A CN110401279B (en) | 2019-07-09 | 2019-07-09 | Shaft-sleeve integrated high-speed permanent magnet motor rotor and assembling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110401279A CN110401279A (en) | 2019-11-01 |
| CN110401279B true CN110401279B (en) | 2021-09-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910618909.6A Active CN110401279B (en) | 2019-07-09 | 2019-07-09 | Shaft-sleeve integrated high-speed permanent magnet motor rotor and assembling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110401279B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11234975A (en) * | 1998-02-18 | 1999-08-27 | Mitsubishi Motors Corp | Assembly for rotor of generator |
| EP1309070A2 (en) * | 2001-10-24 | 2003-05-07 | Pierburg GmbH | Wet rotor motorpump with protection arrangement against corrosion |
| CN101604876A (en) * | 2009-06-23 | 2009-12-16 | 哈尔滨理工大学 | Fan-cooled rotor in shaft of high-speed permanent magnet motor |
| CN101917105A (en) * | 2010-08-20 | 2010-12-15 | 哈尔滨东安发动机（集团）有限公司 | High-speed permanent magnet motor |
| CN106172572A (en) * | 2016-09-26 | 2016-12-07 | 安徽政乐机械有限公司 | A kind of dismiss an internal rotor cooling body for cake frothing machine |
| CN106300737A (en) * | 2016-09-22 | 2017-01-04 | 北京航空航天大学 | A kind of magnetic-suspension high-speed rotor structure for permanent magnet motor |
| CN206820570U (en) * | 2016-02-09 | 2017-12-29 | 源捷公司 | Rotor assembly |
| KR20190050528A (en) * | 2017-11-03 | 2019-05-13 | 엘지전자 주식회사 | A rotor for motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204089545U (en) * | 2014-08-21 | 2015-01-07 | 江西工埠机械有限责任公司 | Ultra-low speed big torsional moment motor and adopt the crane of this motor |
| CN207719914U (en) * | 2018-01-17 | 2018-08-10 | 河南宝天机电科技有限公司 | A kind of superspeed permanent magnet motor rotor structure |
-
2019
- 2019-07-09 CN CN201910618909.6A patent/CN110401279B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11234975A (en) * | 1998-02-18 | 1999-08-27 | Mitsubishi Motors Corp | Assembly for rotor of generator |
| EP1309070A2 (en) * | 2001-10-24 | 2003-05-07 | Pierburg GmbH | Wet rotor motorpump with protection arrangement against corrosion |
| CN101604876A (en) * | 2009-06-23 | 2009-12-16 | 哈尔滨理工大学 | Fan-cooled rotor in shaft of high-speed permanent magnet motor |
| CN101917105A (en) * | 2010-08-20 | 2010-12-15 | 哈尔滨东安发动机（集团）有限公司 | High-speed permanent magnet motor |
| CN206820570U (en) * | 2016-02-09 | 2017-12-29 | 源捷公司 | Rotor assembly |
| CN106300737A (en) * | 2016-09-22 | 2017-01-04 | 北京航空航天大学 | A kind of magnetic-suspension high-speed rotor structure for permanent magnet motor |
| CN106172572A (en) * | 2016-09-26 | 2016-12-07 | 安徽政乐机械有限公司 | A kind of dismiss an internal rotor cooling body for cake frothing machine |
| KR20190050528A (en) * | 2017-11-03 | 2019-05-13 | 엘지전자 주식회사 | A rotor for motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110401279A (en) | 2019-11-01 |
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