CN106168255B - Taper roller formula eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously - Google Patents
Taper roller formula eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously Download PDFInfo
- Publication number
- CN106168255B CN106168255B CN201610142213.7A CN201610142213A CN106168255B CN 106168255 B CN106168255 B CN 106168255B CN 201610142213 A CN201610142213 A CN 201610142213A CN 106168255 B CN106168255 B CN 106168255B
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- China
- Prior art keywords
- bearing
- rotor
- taper roller
- wedge
- taper
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
Abstract
Eliminate the protection bearing arrangement of rotor footpath axial gap, including rotor, protection bearing, bearing gland, screw and bearing block simultaneously the invention discloses a kind of taper roller formula.Rotor tip is processed into tapered inclined-plane；Wedge-shaped plectane, for two pieces of left and right, it is axially located at the outside of circular connector, rolling bearing inner ring is installed in an interference fit, wedge-shaped plectane inner circumferential surface is arranged to corresponding with taper roller number and repeats arc section, and the radial distance L2 at each arc section and device center is gradually reduced from centre to both ends；Positioning cylinder is installed on rolling bearing inner ring；Taper roller and rotor bevel direction are oppositely positioned；Roller Shaft outer round surface contacts with wedge-shaped plectane inner surface.The present invention enough eliminates the radial and axial gap between rotor and taper roller, eliminate the radial and axial gap between rotor and rolling bearing, vibration and impact to rolling bearing after high speed rotor falls are eliminated, meets the needs of high-speed magnetic levitation bearing arrangement development.
Description
Technical field
The present invention relates to magnetic levitation bearing system technical field, especially a kind of taper roller formula eliminates rotor journal axle simultaneously
Protection bearing arrangement to gap.
Background technology
In magnetic levitation bearing system, a set of protection bearing is generally required（Also referred to as auxiliary bearing, replacement bearing, holding shaft
Hold or meet an urgent need bearing）Temporary support is used as under the emergency cases such as system cut-off, overload, control system failure or failure.Circle
The centripetal thrust force protection bearing that cone roller type eliminates rotor clearance automatically can bear load radial and axial simultaneously, ensure high
The rotor of speed rotation does not collide and rubbed with the stationary part of system, to ensure the safety and reliability of whole system.
Traditional protection design bearing is usually to assemble rolling bearing in bearing block, is set between the inner ring and rotor of rolling bearing
Magnetic suspension bearing normal work needed for radial/axial gap be generally between rotor and radial/axial magnetic suspension bearing radial direction
The half of gap.Therefore, protect and be severely affected and vibrate during bearing working, simultaneously because rotor can not eliminate guarantor after falling
The gap protected between bearing and rotor, the ability of protection bearing resistance shock and vibration is poor, easily causes its damage, so that drawing
Send out the major accident of magnetic levitation bearing system damage.Therefore, it is also always to govern magnetic levitation bearing system application to protect bearing
With the principal element of development.
Because the rotating speed of magnetic levitation bearing system is general all very high, and larger radial direction be present between rotor and protection bearing
Gap, rotor is caused to produce very big impact and vibration when dropping on protection bearing.It is to pass through to have a kind of method at present
Circumferentially it is covered with rolling bearing in rotor assembly, after rotor assembly falls, by the motion of periphery rolling bearing to eliminate gap,
But its structure is extremely complex, radial clearance can only be eliminated, it is impossible to axial gap is eliminated, and because root diameter is much larger than week
The diameter of side rolling bearing, causes to fall the Later Zhou Dynasty, one of the Five Dynasties and is much larger than the limit speed of its own to the rotating speed of rolling bearing, not from root
Solves problem on this.
At present there is no can eliminate rotor radial and the protection bearing arrangement of axial gap simultaneously completely.
The content of the invention
In order to overcome the shortcomings of existing technology, rotor footpath axial direction is eliminated simultaneously the invention provides a kind of taper roller formula
The protection bearing arrangement in gap.
The technical solution adopted for the present invention to solve the technical problems is：A kind of taper roller formula eliminates rotor journal axle simultaneously
Protection bearing arrangement to gap, including rotor, radial protection bearing, bearing gland, screw and bearing block, bearing gland lead to
Cross screw to be fixedly connected with the bearing seat, axial compression radial protection bearing, bearing block is fixedly connected with the support of outside；
The radial protection bearing includes taper roller, circular connector, elastic supporting member for supporting optical member, guide groove, wedge-shaped plectane, positioning
Cylinder and rolling bearing；
The circular connector, lead corresponding with taper roller number is circumferentially evenly arranged with circular connector
Groove；
The elastic supporting member for supporting optical member, is arranged in circular connector each between guide groove and taper roller axle, can allow circular cone
The radial displacement of roller；
The rolling bearing, housing washer are installed in bearing block, pass through bearing gland axial compression；
The rotor, rotor tip are processed into tapered inclined-plane；
The wedge-shaped plectane, for two pieces of left and right, the outside of circular connector is axially located at, is installed in an interference fit
In rolling bearing inner ring, wedge-shaped plectane inner circumferential surface is arranged to corresponding with taper roller number and repeats arc section, Mei Yiyuan
The radial distance L2 at segmental arc and device center is gradually reduced from centre to both ends；
The positioning cylinder, the axial centre position of two blocks of wedge-shaped plectanes is placed in, and shows interference with wedge-shaped plectane one and match somebody with somebody
The mode of conjunction is installed on rolling bearing inner ring, and the width for positioning cylinder is slightly larger than the width of circular connector；
The taper roller, the taper of taper roller is identical with rotor tip taper, but is reversely put with rotor bevel direction
Put, taper roller vertically with rotor end surface existing for evenly sized gap L 1；In addition, taper roller include 2 with
On taper roller split, the Roller Shaft that each taper roller split is set by both ends is distributed in leading of being set in circular connector
In groove；Meanwhile Roller Shaft outer round surface contacts with wedge-shaped plectane inner surface.
According to another embodiment of the invention, further comprise, the taper roller split is 2-200.
According to another embodiment of the invention, further comprise, the rolling bearing is deep groove ball bearing, or is one
Angular contact bearings.
According to another embodiment of the invention, further comprising, the elastic supporting member for supporting optical member is independent spring element, or
It is the structure for being integrated with circular connector and being process by techniques such as wire cuttings.
According to another embodiment of the invention, further comprise, the bearing gland is discoid, and disk is circumferentially set
There is a circle screw hole, bearing gland is pressed on the seam crossing of bearing block and rolling bearing.
According to another embodiment of the invention, further comprise, the radial protection bearing material is metal or carbon
Composite made of fiber/glass fibre.
The invention has the advantages that the rotor that the present invention can be aligned/inverted after magnetic levitation bearing system failure is same
When radial and axial protection is provided, and the radial and axial gap between rotor and taper roller can be eliminated, also with regard to phase
When in eliminating the radial and axial gap between rotor and rolling bearing, so as to eliminate after high speed rotor falls to the axis of rolling
The vibration and impact held, the reliability and security of centripetal thrust force protection bearing are improved, to meet high-speed magnetic levitation bearing system
The needs of system development.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the protection bearing arrangement that a kind of taper roller formula of the present invention eliminates rotor footpath axial gap simultaneously
Structural representation.
Fig. 2 is the A-A sectional views at rotor in Fig. 1.
Fig. 3 is I portions enlarged drawing in Fig. 2.
In figure, 1, rotor, 2, circular connector, 3, elastic supporting member for supporting optical member, 4, guide groove, 5, taper roller, 51, taper roller point
Body, 52, Roller Shaft, 6, wedge-shaped plectane, 7, positioning cylinder, 8, rolling bearing, 9, bearing gland, 10, screw, 11, bearing block.
Embodiment
Accompanying drawing discloses the structural representation of preferred embodiment involved in the present invention without limitation；Below with reference to accompanying drawing
Explain technical scheme.
As shown in Figure 1 to Figure 3, a kind of taper roller formula eliminates the protection bearing arrangement of rotor footpath axial gap, bag simultaneously
Rotor 1, radial protection bearing, bearing gland 9, screw 10 and bearing block 11 are included, bearing gland 9 passes through screw 10 and bearing block
11 are fixedly connected, axial compression radial protection bearing, and bearing block 11 is fixedly connected with the support of outside.Specifically, bearing gland 9
To be discoid, bearing gland 9 is pressed on the seam crossing of bearing block 11 and rolling bearing 9.
Radial protection bearing includes taper roller 5, circular connector 2, elastic supporting member for supporting optical member 3, guide groove 4, wedge-shaped plectane 6, fixed
Circle of position cylinder 7 and rolling bearing 8.All radial protection bearing materials are compound made of metal or carbon fibers/fiberglass
Material.
Wherein,
Circular connector 2, guide groove corresponding with the number of taper roller 5 is circumferentially evenly arranged with circular connector 2
4。
Elastic supporting member for supporting optical member 3, is arranged in circular connector 2 each between guide groove 4 and taper roller axle 5, can allow circular cone
The radial displacement of roller 5.Elastic supporting member for supporting optical member 8 is independent spring element, or is integrated with circular connector and is cut by line
The structure that technique is process such as cut.
Rolling bearing 8, the outer ring of rolling bearing 8 are installed in bearing block 11, pass through the axial compression of bearing gland 9.The axis of rolling
It is deep groove ball bearing to hold 8, or is a pair of angular contact bearings.
Rotor 1, the end of rotor 1 are processed into tapered inclined-plane.
Wedge-shaped plectane 6, for two pieces of left and right, the outside of circular connector 6 is axially located at, is installed in an interference fit
The inner ring of rolling bearing 8, the wedge-shaped inner circumferential surface of plectane 6 is arranged to repeatedly arc section H1 corresponding with the number of taper roller 5, each
Arc section and the radial distance L2 at device center are gradually reduced from centre to both ends.
Cylinder 7 is positioned, is placed in the axial centre position of two blocks of wedge-shaped plectanes, and show interference fit with wedge-shaped plectane one
Mode is installed on the inner ring of rolling bearing 8, and the width of positioning cylinder 7 is slightly larger than the width of circular connector 2.
Taper roller 5, the taper of taper roller 5 is identical with rotor tip taper, but is reversely put with the bevel direction of rotor 1
Put, taper roller 5 vertically with the end surface of rotor 1 existing for evenly sized gap L 1；In addition, taper roller 5 includes 2
Taper roller split 51 above, the Roller Shaft 52 that each taper roller split 51 is set by both ends are distributed in circular connector 2
In the guide groove 4 of middle setting；Meanwhile the outer round surface of Roller Shaft 52 contacts with the wedge-shaped inner surface of plectane 6.Taper roller split 51 is 2-
200.
During magnetic suspension bearing normal work, when circular connector 2 and elastic supporting member for supporting optical member 3 cause all 5 splits of taper roller
The centre position in the wedge-shaped inner surface arc section of plectane 6 is carved, i.e., at the split position A of taper roller 5 shown in Fig. 2；All circles
Uniform gap be present between the cone split inner circle of roller 5 and the end chamfer of rotor 1 so that protection bearing arrangement does not disturb rotor
1 normal rotation.Must in addition, in order that to obtain all splits of taper roller 5 equal with the gap uniformity between rotor 1, during installation
It must ensure that each split of taper roller 5 is arranged concentrically with rotor 1, that is, must assure that rolling bearing 8, wedge-shaped plectane 6, taper roller 5
And the center of rotor 1 four is in same straight line.
In addition, in the present embodiment, used circular connector is an annular connecting rod, and used elastic supporting member for supporting optical member is bullet
Spring is integrated the elastomer through the technique machine-shaping such as wire cutting with circular connector.
In magnetic levitation bearing system normal work, the radial clearance between the internal circular surfaces of taper roller 5 and rotor 1 is big
Small about 0.15 mm, both are not in contact with each other, and rotor 1 is to rotate at a high speed, and taper roller 5 is together with the inner ring of rolling bearing 8
Remain static；After magnetic suspension bearing fails, rotor 1 falls, and the end of rotor 1 contacts with the split of part-conical roller 5 and touched
Hit, caused frictional force drives the Roller Shaft at the split both ends of taper roller 5 in wedge shape circle between the split of taper roller 5 and rotor 1
The inner circumferential surface of plate 6 produces relative rolling along rotor rotation direction, because all splits of taper roller 5 pass through circular connector
2 connections, as long as all have a split of taper roller 5 to produce relative rolling with wedge-shaped plectane 6, other splits of taper roller 5
Roller Shaft is inevitable to produce the relative rolling of identical simultaneously；Due to the arc section inner surface setting in wedge-shaped plectane 6 be with device
The radial distance of the heart is gradually reduced from centre to both ends, so after the split of taper roller 5 and 1 making contact of rotor, Suo Youyuan
The cone split of roller 5 is radially proximating the central motion of device, and this motion is so that between all splits of taper roller 5 and rotor 1
Gap reduce rapidly, when all splits of taper roller 5 roll all at the relative position A of the wedge-shaped inner surface arc section of plectane 6
To the B of position, the gap between the split of taper roller 5 and rotor 1 is reduced to zero, so as to eliminate rotor 1 and all circular cones
Gap between the split of roller 5, because the end of rotor 1 and taper roller 5 have identical taper and oppositely positioned, so working as
When gap elimination between rotor 1 and the split of all taper rollers 5 is zero, it is equivalent to eliminate rotor 1 and the axis of rolling simultaneously
Hold the radial and axial gap between 8 inner rings., can be notable so as to eliminate impact and vibration after rotor falls to protecting bearing
Improve the life-span of centripetal thrust force protection bearing in magnetic levitation bearing system, and this device can be to rotor along clockwise or inverse
Hour hands both direction rotation fall all play it is radial and axial and meanwhile protective effect.
The present invention operation principle be：
During installation, the elastic supporting member for supporting optical member 3 for acting on the split of taper roller 5 is utilized so that the split of taper roller 5 is in wedge shape
The initial position of the inner surface of plectane 6（Position A）, and acted on by circular connector 2 at each split of taper roller 5
In this initial position.In magnetic levitation bearing system normal operation, all splits of taper roller 5 are in initial position all the time
Place, remains static, now together with wedge-shaped plectane 6, circular connector 2, elastic supporting member for supporting optical member 3 and the inner ring of rolling bearing 8
It is normal that magnetic levitation bearing system is there are between the tapered slope of the end of rotor 1 and the tapered slope of the split of each taper roller 5
Portable protective gaps（Typically about 0.15 mm）.After magnetic levitation bearing system fails, rotor 1 falls rear and part-conical roller 5
Split making contact, very big relative velocity between rotor 1 and taper roller 5 now on the one hand be present, on the other hand there is collision
Power acts on, and frictional force caused by the impact force between rotor 1 and taper roller 5 causes the Roller Shaft of the split of part-conical roller 5
The relative rolling of the rotation direction of rotor 1 is taken place along in the wedge-shaped inner surface of plectane 6, passes through the effect of circular connector 2, other circles
Identical rolling can also be produced relative to wedge-shaped plectane 6 simultaneously by boring the Roller Shaft of the split of roller 5.Due to the wedge-shaped inner circumferential of plectane 6
Surface is arranged to corresponding with the number of taper roller 5 and repeats arc section, the radial distance at each arc section and device center by
Centre is gradually reduced to both ends, so rotor 1 and the collision rift of taper roller 5, all splits of taper roller 5 are radially proximating device
Central motion, when radial distance of the taper roller 5 along the wedge-shaped inner circumferential surface scrolls of plectane 6 and portable protective gaps are equal in magnitude
When（Taper roller 5 is rolled to relative position B）, that is, the gap between rotor 1 and taper roller 5 is completely eliminated, is equivalent to
Eliminate existing radial and axial gap between rotor 1 and rolling bearing 8 simultaneously.Now, all taper rollers 5 are together with annular
Connector 2, rolling bearing 8 together with rotor 1 together still around magnetic levitation bearing system normal work when pivot
Rotation, i.e., rotor will not occur with protecting the collision of bearing, will not also produce repeated stock and vibration to protection bearing, improve
Protect the life-span of bearing.
Claims (5)
1. a kind of taper roller formula eliminates the protection bearing arrangement of rotor footpath axial gap, including rotor simultaneously（1）, protection axle
Hold, bearing gland（9）, screw（10）And bearing block（11）, bearing gland（9）Pass through screw（10）With bearing block（11）It is fixed
Connection, axial compression protection bearing, bearing block（11）It is fixedly connected with the support of outside；
The protection bearing includes taper roller（5）, circular connector（2）, elastic supporting member for supporting optical member（3）, guide groove（4）, wedge-shaped plectane
（6）, positioning cylinder（7）And rolling bearing（8）；
The circular connector（2）, circular connector（2）In be circumferentially evenly arranged with and taper roller（5）Number is corresponding
Guide groove（4）；
The elastic supporting member for supporting optical member（3）, it is arranged at circular connector（2）In each guide groove（4）With taper roller axle（52）Between, can
Allow taper roller（5）Radial displacement；
The rolling bearing（8）, rolling bearing（8）Outer ring is installed on bearing block（11）In, pass through bearing gland（9）Axially pressure
Tightly；
It is characterized in that
The rotor（1）, rotor（1）It is processed into tapered inclined-plane end；
The wedge-shaped plectane（6）, for two pieces of left and right, it is axially located at circular connector（2）Outside, pacify in an interference fit
Loaded on rolling bearing（8）Inner ring, wedge-shaped plectane（6）Inner circumferential surface is arranged to and taper roller（5）Repeat to justify corresponding to number
Segmental arc H1, the radial distance L2 at each arc section and device center are gradually reduced from centre to both ends；
The positioning cylinder（7）, it is placed in two blocks of wedge-shaped plectanes（6）Axial centre position, and with wedge-shaped plectane（6）One showed
The mode of cooperation of being full of is installed on rolling bearing（8）Inner ring, position cylinder（7）Width be slightly larger than circular connector（2）Width；
The taper roller（5）, taper roller（5）Taper and rotor（1）End taper is identical, but and rotor（1）Inclined-plane side
To oppositely positioned, taper roller（5）Vertically with rotor（1）Evenly sized gap L 1 existing for end surface；In addition, circular cone
Roller（5）Including the taper roller split of more than 2（51）, each taper roller split（51）The Roller Shaft set by both ends
（52）It is distributed in circular connector（2）The guide groove of middle setting（4）It is interior；Meanwhile Roller Shaft（52）The outer circumference surface of radial outside with
Wedge-shaped plectane（6）Inner circumferential surface contacts.
2. a kind of taper roller formula according to claim 1 eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously,
It is characterized in that：The taper roller split（51）For 2-200.
3. a kind of taper roller formula according to claim 1 eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously,
It is characterized in that：The rolling bearing（8）For deep groove ball bearing, or it is a pair of angular contact bearings.
4. a kind of taper roller formula according to claim 1 eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously,
It is characterized in that：The elastic supporting member for supporting optical member（3）For independent spring element, or and circular connector（2）It is integrated and passes through
The structure that wire cutting technology is process.
5. a kind of taper roller formula according to claim 1 eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously,
It is characterized in that：The bearing gland（9）To be discoid, disk is circumferentially provided with a circle screw hole, bearing gland（9）It is pressed on axle
Bearing（11）With rolling bearing（9）Seam crossing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610142213.7A CN106168255B (en) | 2016-03-14 | 2016-03-14 | Taper roller formula eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610142213.7A CN106168255B (en) | 2016-03-14 | 2016-03-14 | Taper roller formula eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106168255A CN106168255A (en) | 2016-11-30 |
| CN106168255B true CN106168255B (en) | 2018-04-03 |
Family
ID=57359291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610142213.7A Expired - Fee Related CN106168255B (en) | 2016-03-14 | 2016-03-14 | Taper roller formula eliminates the protection bearing arrangement of rotor footpath axial gap simultaneously |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106168255B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443335B (en) * | 2018-05-30 | 2024-04-05 | 江苏理工学院 | Crank sliding block type radial protection bearing |
| CN109654122B (en) * | 2019-01-02 | 2020-05-05 | 江苏理工学院 | Protection bearing device in adjustable bearing inner race clearance |
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|---|---|---|---|---|
| IT1116082B (en) * | 1978-05-23 | 1986-02-10 | Nadella | RADIAL BEARING TO RESUME THE GAME |
| EP0412870A1 (en) * | 1989-08-10 | 1991-02-13 | Nadella | Prestressed radial rollbearing, especially for an automotive vehicle suspension |
| CN2823655Y (en) * | 2005-06-25 | 2006-10-04 | 攀枝花新钢钒股份有限公司 | Integral bearing seat capable of regulating bearing fastening force |
| JP2008138779A (en) * | 2006-12-01 | 2008-06-19 | Ntn Corp | Shaft supporting device and preload method for cylindrical roller bearing |
| CN102112760A (en) * | 2008-09-24 | 2011-06-29 | 三菱重工业株式会社 | Speed-up device for wind-driven generator and support mechanism for rotating shaft |
| CN103912589A (en) * | 2014-03-25 | 2014-07-09 | 南京航空航天大学 | Centripetal thrust protection bearing device for automatically eliminating clearance |
-
2016
- 2016-03-14 CN CN201610142213.7A patent/CN106168255B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1116082B (en) * | 1978-05-23 | 1986-02-10 | Nadella | RADIAL BEARING TO RESUME THE GAME |
| EP0412870A1 (en) * | 1989-08-10 | 1991-02-13 | Nadella | Prestressed radial rollbearing, especially for an automotive vehicle suspension |
| CN2823655Y (en) * | 2005-06-25 | 2006-10-04 | 攀枝花新钢钒股份有限公司 | Integral bearing seat capable of regulating bearing fastening force |
| JP2008138779A (en) * | 2006-12-01 | 2008-06-19 | Ntn Corp | Shaft supporting device and preload method for cylindrical roller bearing |
| CN102112760A (en) * | 2008-09-24 | 2011-06-29 | 三菱重工业株式会社 | Speed-up device for wind-driven generator and support mechanism for rotating shaft |
| CN103912589A (en) * | 2014-03-25 | 2014-07-09 | 南京航空航天大学 | Centripetal thrust protection bearing device for automatically eliminating clearance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106168255A (en) | 2016-11-30 |
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