CN102611227A - Magnetic isolation structure of megawatt-level half-direct-drive permanent magnet motor rotor - Google Patents
Magnetic isolation structure of megawatt-level half-direct-drive permanent magnet motor rotor Download PDFInfo
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- CN102611227A CN102611227A CN2012100741029A CN201210074102A CN102611227A CN 102611227 A CN102611227 A CN 102611227A CN 2012100741029 A CN2012100741029 A CN 2012100741029A CN 201210074102 A CN201210074102 A CN 201210074102A CN 102611227 A CN102611227 A CN 102611227A
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Abstract
The invention provides a magnetic isolation structure of a megawatt-level half-direct-drive permanent magnet motor rotor. The structure comprises a rotor core; magnetic steel slots are punched on the circumference of the rotor core; the two ends of each magnetic steel slot are connected with magnetic isolation slots; the stuffing of the magnetic steel slots and magnetic isolation slots is placed in the magnetic steel slots and the magnetic isolation slots respectively; two pieces of magnetic steel are placed in each magnetic steel slot; and a magnetic isolation piece is filled between the two pieces of magnetic steel. The magnetic isolation structure provided by the invention solves the problem of loosening caused by the radial assembly gap of the magnetic steel in the slots or the magnetic steel breakage caused by excessively tight radial rigid compaction, and completely realizes sealing to prevent air gaps leading to corrosion of the magnetic steel.
Description
Technical field
The present invention relates to the rotor of high-power permanent magnet motor field, be specifically related to the magnetic shielding structure that a kind of megawatt semi-direct drives permanent magnet machine rotor.
Background technology
Traditional megawatt-level permanent magnet rotor is generally direct-drive permanent-magnetism type or high-speed permanent magnetic type.Large-scale direct-drive permanent-magnetism rotor is because its structure is huge, the rare-earth permanent magnet consumption is big, manufacture difficulty is high, production has high input, hard transportation; Especially rare-earth permanent magnet resource-constrained and price rapid growth; Big limitations the great development of direct-drive permanent-magnetism motor, even a lot of enterprise has to consider remodeling.Powerful high-speed permanent magnetic synchronous motor rotor; Because root diameter is big, rotor is high; Reach 2000rpm, even higher rotating speed, condition lower rotor part magnet steel produces huge centrifugal force like this; Bear such centrifugal force and just bring great obstruction, and reliability is difficult to guarantee to the fastening structure design of rotor core design and magnet steel.
The half directly-drive permanent magnet motor since avoided direct-drive permanent-magnetism type or high-speed permanent magnetic type rotor manufacture and design with cost on a difficult problem, market has preferably appearred, will become a desirable type.Therefore the rotor of half directly-drive permanent magnet motor more need be sought the design of mechanical strength height, dependable performance.
Summary of the invention
The object of the present invention is to provide a kind of megawatt semi-direct to drive the magnetic shielding structure of permanent magnet machine rotor, avoid the difficult problem in direct-drive permanent-magnetism type or high-speed permanent magnetic type motor manufacturing cost and the design,
Technical scheme of the present invention is following:
A kind of megawatt semi-direct drives the magnetic shielding structure of permanent magnet machine rotor; Comprise rotor core; Punching out has the magnet steel groove on the circumference of said rotor core, and the two ends of each magnet steel groove are connected with magnet isolation tank, and magnet steel, magnet isolation tank inserts place respectively in said magnet steel groove, the magnet isolation tank; Be placed with two magnet steel in each magnet steel groove, be filled with between said two magnet steel at a distance from magnetic spare.
Its further technical scheme is: said thickness at a distance from magnetic spare is 0.1 ~ 1mm, and said height at a distance from magnetic spare equates with the thickness of magnet steel.
Its further technical scheme is: said material at a distance from magnetic spare is the thermal expansivity glass felt, and the gap between magnet steel and the magnet steel groove was filled up in expansion after it absorbed epoxy resin, and was bonded to one with magnet steel and magnet steel groove.
Its further technical scheme is: the material of said magnet isolation tank inserts is the elastic bulk glass fiber, and magnet isolation tank was filled up in expansion after it absorbed epoxy resin, and was bonded to one with magnet steel and magnet isolation tank.
Useful technique effect of the present invention is:
The present invention is through the design to the inserts in magnetic spare, magnet isolation tank and magnet isolation tank; Solved magnet steel in groove radially the loosening problem or the radial rigidity that cause of fit-up gap compress the magnet steel damaging problem that too tightly causes; And fully realize sealing, prevent that the existence of air-gap from causing the magnet steel corrosion.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of unfilled rotor core.
Embodiment
Further specify below in conjunction with the accompanying drawing specific embodiments of the invention.
As shown in Figure 2, the present invention includes rotor core 1, punching out has a plurality of magnet steel grooves 5 on the circumference of rotor core 1, and the two ends of each magnet steel groove 5 respectively are connected with a magnet isolation tank 6.As shown in Figure 1, magnet steel 2, magnet isolation tank inserts 4 place respectively in magnet steel groove 5, the magnet isolation tank 6.Be placed with in each magnet steel groove 5 and be filled with between 2, two magnet steel 2 of two magnet steel at a distance from magnetic spare 3.
Thickness at a distance from magnetic spare 3 is 0.1 ~ 1mm, and height is identical with the thickness of every block of magnet steel 2, and it separates two blocks of magnet steel 2 of same axial location in every utmost point magnet steel groove 5.Magnet isolation tank inserts 4 is after the magnet steel 2 of every utmost point all inserts; Insert in the magnet isolation tank 6 of this utmost point; After axial restraint is carried out through magnet steel end hold down gag in magnetic spare 3, magnet isolation tank inserts 4 two ends; Absorb epoxies at a distance from magnetic spare 3 with magnet isolation tank inserts 4 behind the vacuum encapsulation epoxy resin and expand and baking and curing, the gap in the filling slot also is bonded to firm integral body with magnet steel 2 and core stamping, prevents that the loosening or air-gap of magnet steel 2 from existing.
Separated magnetic spare 3 in every utmost point magnet steel groove 5 adopts the thermal expansivity glass felt, and it is full to expand behind this glass felt absorption epoxy resin, fills up the gap between magnet steel 2 and the magnet steel groove 5, and is bonded to one.Magnet isolation tank inserts 4 adopts the elastic bulk glass fiber material, and fluffy softness is prone to fill, at rotor overall vacuum epoxy resin-impregnated lacquer and after solidifying; It fully inhales lacquer expansion resilience, and rebound degree can reach 80%, can guarantee fully closely to fill up in the magnet isolation tank 6 of irregular geometrical cross-sectional shape and does not leave gap and cavity; Be bonded to one with magnet steel 2 and magnet isolation tank 6, intensity is big, and hardness is suitable with magnet steel 2; And toughness is big, can guarantee still when expanding with heat and contract with cold that magnet steel 2 is fixed not loosening.
Above-described only is preferred implementation of the present invention, the invention is not restricted to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite that does not break away from basic design of the present invention, all should think to be included within protection scope of the present invention.
Claims (4)
1. a megawatt semi-direct drives the magnetic shielding structure of permanent magnet machine rotor; It is characterized in that: comprise rotor core (1); Punching out has magnet steel groove (5) on the circumference of said rotor core (1); The two ends of each magnet steel groove (5) are connected with magnet isolation tank (6), and magnet steel (2), magnet isolation tank inserts (4) place respectively in said magnet steel groove (5), the magnet isolation tank (6); Be placed with two magnet steel (2) in each magnet steel groove (5), be filled with between said two magnet steel (2) at a distance from magnetic spare (3).
2. drive the magnetic shielding structure of permanent magnet machine rotor according to the said megawatt semi-direct of claim 1, it is characterized in that: said thickness at a distance from magnetic spare (3) is 0.1 ~ 1mm, and said height at a distance from magnetic spare (3) equates with the thickness of magnet steel (2).
3. drive the magnetic shielding structure of permanent magnet machine rotor according to the said megawatt semi-direct of claim 1; It is characterized in that: said material at a distance from magnetic spare (3) is the thermal expansivity glass felt; The gap between magnet steel (2) and the magnet steel groove (5) was filled up in expansion after it absorbed epoxy resin, and was bonded to one with magnet steel (2) and magnet steel groove (5).
4. drive the magnetic shielding structure of permanent magnet machine rotor according to the said megawatt semi-direct of claim 1; It is characterized in that: the material of said magnet isolation tank inserts (4) is the elastic bulk glass fiber; Magnet isolation tank (6) was filled up in expansion after it absorbed epoxy resin, and was bonded to one with magnet steel (2) and magnet isolation tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100741029A CN102611227A (en) | 2012-03-20 | 2012-03-20 | Magnetic isolation structure of megawatt-level half-direct-drive permanent magnet motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100741029A CN102611227A (en) | 2012-03-20 | 2012-03-20 | Magnetic isolation structure of megawatt-level half-direct-drive permanent magnet motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102611227A true CN102611227A (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100741029A Pending CN102611227A (en) | 2012-03-20 | 2012-03-20 | Magnetic isolation structure of megawatt-level half-direct-drive permanent magnet motor rotor |
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| CN (1) | CN102611227A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319927A (en) * | 2014-10-11 | 2015-01-28 | 新疆金风科技股份有限公司 | Motor slot wedge with sealing structure and combination device |
| CN110798000A (en) * | 2019-11-12 | 2020-02-14 | 中车株洲电机有限公司 | Permanent magnet fixing structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040217666A1 (en) * | 2002-12-11 | 2004-11-04 | Ballard Power Systems Corporation | Rotor assembly of synchronous machine |
| US20060279158A1 (en) * | 2005-06-13 | 2006-12-14 | Samsung Electronics Co., Ltd. | Permanent-magnet motor |
| CN101494397A (en) * | 2008-01-23 | 2009-07-29 | 上海荟懿环保科技有限公司 | Large-sized speed-changing wind power generator with embedded permanent magnet |
| CN101944788A (en) * | 2010-07-06 | 2011-01-12 | 东元总合科技（杭州）有限公司 | Rotor of high-power permanent magnet motor and permanent magnet synchronous wind-driven generator using same |
| CN202550734U (en) * | 2012-03-20 | 2012-11-21 | 中科盛创（青岛）电气有限公司 | Magnetism isolating structure of megawatt-level half-direct drive permanent magnet motor |
-
2012
- 2012-03-20 CN CN2012100741029A patent/CN102611227A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040217666A1 (en) * | 2002-12-11 | 2004-11-04 | Ballard Power Systems Corporation | Rotor assembly of synchronous machine |
| US20060279158A1 (en) * | 2005-06-13 | 2006-12-14 | Samsung Electronics Co., Ltd. | Permanent-magnet motor |
| CN101494397A (en) * | 2008-01-23 | 2009-07-29 | 上海荟懿环保科技有限公司 | Large-sized speed-changing wind power generator with embedded permanent magnet |
| CN101944788A (en) * | 2010-07-06 | 2011-01-12 | 东元总合科技（杭州）有限公司 | Rotor of high-power permanent magnet motor and permanent magnet synchronous wind-driven generator using same |
| CN202550734U (en) * | 2012-03-20 | 2012-11-21 | 中科盛创（青岛）电气有限公司 | Magnetism isolating structure of megawatt-level half-direct drive permanent magnet motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319927A (en) * | 2014-10-11 | 2015-01-28 | 新疆金风科技股份有限公司 | Motor slot wedge with sealing structure and combination device |
| CN104319927B (en) * | 2014-10-11 | 2016-04-27 | 新疆金风科技股份有限公司 | There is motor slot wedge and the combination unit of hermetically-sealed construction |
| US10848030B2 (en) | 2014-10-11 | 2020-11-24 | Xinjiang Goldwind Science & Technology Co., Ltd. | Motor slot wedge with sealing structure and combination device |
| CN110798000A (en) * | 2019-11-12 | 2020-02-14 | 中车株洲电机有限公司 | Permanent magnet fixing structure |
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Application publication date: 20120725 |