CN109882353A - Yaw pitch drive and yaw device and vane change device using the device - Google Patents
Yaw pitch drive and yaw device and vane change device using the device Download PDFInfo
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- CN109882353A CN109882353A CN201910289492.3A CN201910289492A CN109882353A CN 109882353 A CN109882353 A CN 109882353A CN 201910289492 A CN201910289492 A CN 201910289492A CN 109882353 A CN109882353 A CN 109882353A
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- hydraulic cylinder
- turntable bearing
- translation
- outer ring
- rack gear
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- 230000008859 change Effects 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims 2
- 201000009482 yaws Diseases 0.000 claims 2
- 238000009355 double cropping Methods 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Wind Motors (AREA)
Abstract
The present invention relates to a kind of wind power yawing and vane change devices, especially yaw pitch drive and yaw device and vane change device using the device.Pitch drive, including turntable bearing are yawed, it further includes rack gear that the outer ring of the turntable bearing, which is equipped with tooth, and the rack gear is located at the side of outer ring, and the rack gear is no less than two, and is arranged around the axis annular array of turntable bearing；Lifting device, the rack gear are fixed on lifting device, and the lifting device is engaged and separates with the tooth on turntable bearing outer ring for rack gear；And translation device, the lifting device are fixed on translation device, the translation device is moved back and forth for drive rack.The device uses hydraulic yawing pitch-controlled system, and unit volume is small, light-weight, dynamic response is good, torque is big, is not necessarily to gear, and pitch-controlled system carries out all-cis paddle operation without designing backup power source to blade in power loss, using accumulator as back-up power source.
Description
Technical field
The present invention relates to a kind of wind power yawing and vane change device, especially yaw pitch drive and using the device
Yaw device and vane change device.
Background technique
Wind driven generator yaw pitching manner generallys use electronic yaw pitch-controlled system, electronic yaw pitch-controlled system list at present
Position volume and weight is big, needs to configure large speed ratio reduction gear box, when pitch-controlled system power loss, carries out all-cis paddle operation also to blade
Backup power source need to be configured.
Summary of the invention
To solve the above problems, the present invention provides a kind of unit volume small, light-weight, without backup power source yaw variable pitch
Driving device and the yaw device and vane change device for using the device, the specific technical proposal is:
Pitch drive, including turntable bearing are yawed, it further includes rack gear that the outer ring of the turntable bearing, which is equipped with tooth, institute
The side that rack gear is located at outer ring is stated, the rack gear is no less than two, and is arranged around the axis annular array of turntable bearing；Lifting dress
It sets, the rack gear is fixed on lifting device, and the lifting device is engaged for rack gear with the tooth on turntable bearing outer ring
And separation；And
Translation device, the lifting device are fixed on translation device, and the translation device is back and forth moved for drive rack
Dynamic, the rack gear is used to drive the outer ring rotating of turntable bearing.
By using above-mentioned technical proposal, it is mobile that translation device pushes rack gear, to realize the outer of rack gear and turntable bearing
Circle relatively rotates, and then realizes yaw and variable pitch.When the tooth engagement of rack gear and turntable bearing outer ring, translation device pushes rack gear
Mobile, the outer ring of rack gear and turntable bearing, which is sent, to be relatively rotated, and then lifting device retracts rack gear, rack gear and turntable bearing outer ring
Tooth separation, rack gear resets under the drive of translation device, after tooth bar resets under the action of lifting device and outside turntable bearing
The tooth engagement of circle continues to press on the outer ring rotating of turntable bearing.
Due to the rack gear using no less than two, two rack gears be can work alternately, and realize continuous operation, and maintain
The tooth contact of rack gear and turntable bearing outer ring prevents the outer ring of turntable bearing to be freely rotated without limitation.
Rack gear is kept under normal circumstances and the tooth engagement of the outer ring of turntable bearing, so that the position of yaw and variable pitch is locked,
Without brake, stability is not good.
Preferably, the lifting device includes sliding seat, and the sliding seat is equipped with lifting groove, and the rack gear is slidably installed
In lifting groove, the sliding seat is connect with translation device；And lifting hydraulic cylinder, the bottom of the lifting hydraulic cylinder are fixed on liter
The bottom of slot drops, and the piston rod of lifting hydraulic cylinder and the bottom of rack gear connect, the tooth when piston rod of the lifting hydraulic cylinder retracts
Item is separated with the tooth of turntable bearing outer ring, and the piston rod of the lifting hydraulic cylinder stretches out hour rack and the tooth of turntable bearing outer ring is nibbled
It closes.
By using above-mentioned technical proposal, the lifting of lifting hydraulic cylinder drive rack, rack gear is installed in sliding seat, will be axial
Power passes to sliding seat, bears radial force by sliding seat.
Preferably, the lifting hydraulic cylinder is no less than two.
By using above-mentioned technical proposal, multiple lifting hydraulic cylinders can reduce the radial force of single lifting hydraulic cylinder, and
Improve the stability of rack gear.
Preferably, the translation device includes sliding fixing seat, and the sliding fixing seat is equipped with sliding groove, the sliding
Seat is slidably mounted in sliding groove；And single pole double acting hydraulic cylinder, the single pole double acting hydraulic cylinder are mounted on sliding fixing seat
One end, the piston rod of the single pole double acting hydraulic cylinder connect with sliding seat.
By using above-mentioned technical proposal, by the latched position of stability hydraulic, be not necessarily to brake apparatus, simplify structure and
Control.
Hydraulic system unit volume is small, light-weight, dynamic response is good, torque is big, is not necessarily to gear.It, will in power loss
Accumulator carries out operation without designing backup power source as back-up power source.
Preferably, the translation device includes
Dual-rod hydraulic cylinder, the dual-rod hydraulic cylinder include translation hydraulic cylinder and translation piston rod, the translation hydraulic cylinder
Sliding seat is housed, the translation piston rod is slidably mounted on translation hydraulic cylinder on body；And cylinder body fixing seat, the cylinder body are solid
Reservation is equipped with cylinder body sliding groove, and the translation hydraulic cylinder is slidably mounted in cylinder body sliding groove, the translation piston rod
Both ends are separately fixed at the both ends of cylinder body sliding groove.
By using above-mentioned technical proposal, by the latched position of stability hydraulic, be not necessarily to brake apparatus, simplify structure and
Control.
Dual-rod hydraulic cylinder body rotates the volume that can reduce translation device.
Yaw device, the yaw device include yaw pitch drive；The outer ring of tower, the turntable bearing is fixed
At the top of tower；And mainframe, the mainframe are fixed on the inner ring of turntable bearing, the translation device is fixed on host
The bottom of frame, and it is located at the side of the outer ring of turntable bearing.
Vane change device, the vane change device include yaw pitch drive；The inner ring of wheel hub, the turntable bearing is fixed
On wheel hub, the translation device is fixed on wheel hub, and is located at the side of the outer ring of turntable bearing；And fan blade, the fan blade
It is fixed on the outer ring of turntable bearing.
Compared with prior art the invention has the following advantages:
Yaw pitch drive provided by the invention and the yaw device for using the device and vane change device are using hydraulic
Pitch-controlled system is yawed, hydraulic yawing pitch-controlled system unit volume is small, light-weight, dynamic response is good, torque is big, is not necessarily to variable-speed motor
Structure, it is spare without designing that pitch-controlled system carries out all-cis paddle operation to blade in power loss, using accumulator as back-up power source
Power supply.
Detailed description of the invention
Fig. 1 is the positive structure diagram of embodiment one and vane change device；
Fig. 2 is the partial enlargement structural representation of embodiment one and vane change device；
Fig. 3 is the structural schematic diagram of embodiment two and yaw device；
Fig. 4 is the present invention looks up structural representation of embodiment two and yaw device, conceals tower；
Fig. 5 is the schematic diagram of the section structure of dual-rod hydraulic cylinder and sliding seat.
Specific embodiment
Now in conjunction with attached drawing, the invention will be further described.
Embodiment one
As shown in Figures 1 to 5, pitch drive, including turntable bearing are yawed, the outer ring 11 of turntable bearing is equipped with tooth
111, it further include rack gear 2, rack gear 2 is located at the side of outer ring 11, and rack gear 2 is no less than two, and around the axis of turntable bearing annular
Array setting；Lifting device, rack gear 2 are fixed on lifting device, and lifting device is on rack gear 2 and turntable bearing outer ring 11
Tooth 111 is engaged and separates；And translation device, lifting device are fixed on translation device, translation device is used for drive rack 2
It moves back and forth, rack gear 2 is for driving the outer ring 11 of turntable bearing to rotate.
It is mobile that translation device pushes rack gear 2, to realize that the outer ring 11 of rack gear 2 and turntable bearing relatively rotates, thus real
Now yaw and variable pitch.When rack gear 2 is engaged with the tooth 111 of turntable bearing outer ring 11, translation device pushes rack gear 2 mobile, rack gear 2
It sends and relatively rotates with the outer ring 11 of turntable bearing, then lifting device retracts rack gear 2, rack gear 2 and turntable bearing outer ring 11
Tooth 111 separates, and rack gear 2 resets under the drive of translation device, rack gear 2 reset after under the action of lifting device with turntable bearing
The tooth 111 of outer ring 11 engages, and the outer ring 11 for continuing to press on turntable bearing rotates.
Due to the rack gear 2 using no less than two, two rack gears 2 be can work alternately, and realize continuous operation, and keep
At least one rack gear 2 is contacted with the tooth 111 of turntable bearing outer ring 11, prevents the outer ring 11 of turntable bearing from turning without restraint of liberty
It is dynamic, to realize the outer ring 11 of locking turntable bearing.
Rack gear 2 keeps engaging with the tooth 111 of the outer ring 11 of turntable bearing under normal circumstances, to lock yaw and variable pitch
Position is not necessarily to brake, simplifies structure, reduces control difficulty and fault point, improves stability and reliability.
Lifting device includes sliding seat 6, and sliding seat 6 is equipped with lifting groove 61, and rack gear 2 is slidably mounted in lifting groove 61,
Sliding seat 6 is connect with translation device；And lifting hydraulic cylinder 62, the bottom of lifting hydraulic cylinder 62 are fixed on the liquid of 61 bottom of lifting groove
In cylinder pressure slot 63, the piston rod of lifting hydraulic cylinder 62 is connect with the bottom of rack gear 2, the tooth when piston rod of lifting hydraulic cylinder 62 retracts
Item 2 is separated with the tooth 111 of turntable bearing outer ring 11, and the piston rod of lifting hydraulic cylinder 62 stretches out hour rack 2 and turntable bearing outer ring
11 tooth 111 engages.
There are two lifting hydraulic cylinder 62 is set.Two lifting hydraulic cylinders can reduce the radial force and axis of single lifting hydraulic cylinder
Xiang Li improves the stability of rack gear 2 lifting and locking.
Translation device includes sliding fixing seat 3, and sliding fixing seat 3 is equipped with sliding groove 31, and sliding seat 6 is slidably mounted on cunning
In dynamic slot 31；And single pole double acting hydraulic cylinder 44, single pole double acting hydraulic cylinder 44 are mounted on one end of sliding fixing seat 3, single pole
The piston rod of double acting hydraulic cylinder 44 is connect with sliding seat 6.Single pole double acting hydraulic cylinder 44 can carry out positive and negative bidirectional modulation.
Embodiment two
The present embodiment and embodiment one are the difference is that translation device, as shown in Figures 3 to 5, translation device includes
Dual-rod hydraulic cylinder, dual-rod hydraulic cylinder include translation hydraulic cylinder 41 and translation piston rod 42, are equipped with and slide on translation hydraulic cylinder 41
Dynamic seat 6, translation piston rod 42 are slidably mounted on translation hydraulic cylinder 41；And cylinder body fixing seat 7, cylinder body fixing seat 7 are equipped with
Cylinder body sliding groove 71, translation hydraulic cylinder 41 are slidably mounted in cylinder body sliding groove 71, and the both ends of translation piston rod 42 are solid respectively
It is scheduled on the both ends of cylinder body sliding groove 71.Dual-rod hydraulic cylinder can carry out positive and negative bidirectional modulation.
Hydraulic yawing pitch-controlled system unit volume is small, light-weight, dynamic response is good, torque is big, is not necessarily to gear, variable pitch
System carries out all-cis paddle operation without designing backup power source to blade in power loss, using accumulator as back-up power source.
As shown in Fig. 1, Fig. 3 to Fig. 5, yaw device, yaw device includes yaw pitch drive；Tower 82, turntable
The outer ring 11 of bearing is fixed on the top of tower 82；And mainframe 81, mainframe 81 are fixed on the inner ring 12 of turntable bearing, directly
Moving device is fixed on the bottom of mainframe 81, and is located at the side of the outer ring 11 of turntable bearing.
Specifically, translation device includes dual-rod hydraulic cylinder, dual-rod hydraulic cylinder includes translation hydraulic cylinder 41 and translation piston
Bar 42, sliding seat 6 is equipped on translation hydraulic cylinder 41, and translation piston rod 42 is slidably mounted on translation hydraulic cylinder 41；And cylinder
Body fixing seat 7, cylinder body fixing seat 7 is mounted on the bottom of mainframe 81, and is arranged around the axis annular array of turntable bearing, cylinder body
There are six fixing seat 7 is set, cylinder body fixing seat 7 is equipped with cylinder body sliding groove 71, and it is sliding that translation hydraulic cylinder 41 is slidably mounted on cylinder body
In dynamic slot 71, the both ends of translation piston rod 42 are separately fixed at the both ends of cylinder body sliding groove 71.
When needing to yaw, dual-rod hydraulic cylinder starting, translation hydraulic cylinder 41 pushes sliding seat 6 mobile, and sliding seat 6 is with movable tooth
Item 2 moves, and rack gear 2 drives mainframe 81 to rotate under the action of 11 tooth 111 of the outer ring that dish axle is held, after rack gear 2 moves in place
Lifting hydraulic cylinder 62 retracts piston rod, and rack gear 2 is separated with the tooth 111 of turntable bearing outer ring 11, and then translation hydraulic cylinder 41 is multiple
Position, translation hydraulic cylinder 41 reset after the completion of lifting hydraulic cylinder 62 piston rod stretch out, rack gear 2 again with turntable bearing outer ring 11
Tooth 111 engage, above-mentioned movement is repeated, until yawing in place.It can carry out positive and negative bidirectional modulation.
As shown in Figure 1 to Figure 2, vane change device, vane change device include yaw pitch drive；Wheel hub, turntable bearing
Inner ring is fixed on wheel hub, and translation device is fixed on wheel hub, and is located at the side of the outer ring 11 of turntable bearing；And fan blade, wind
Leaf is fixed on the outer ring 11 of turntable bearing.
Specifically, translation device includes sliding fixing seat 3, sliding fixing seat 3 is equipped with sliding groove 31, and sliding seat 6 slides
It is mounted in sliding groove 31；And single pole double acting hydraulic cylinder 44, single pole double acting hydraulic cylinder 44 are mounted on the one of sliding fixing seat 3
End, the piston rod of single pole double acting hydraulic cylinder 44 are connect with sliding seat 6.
When needing variable pitch, single pole double acting hydraulic cylinder 44 starts, and single pole double acting hydraulic cylinder 44 pushes sliding seat 6 mobile,
Sliding seat 6 is mobile with carry-over bar 2, and rack gear 2 pushes the outer ring 11 of turntable bearing to rotate, and the outer ring 11 of turntable bearing drives fan blade to turn
Dynamic, lifting hydraulic cylinder 62 retracts piston rod after rack gear 2 moves in place, and rack gear 2 is separated with the tooth 111 of turntable bearing outer ring 11,
Then single pole double acting hydraulic cylinder 44 resets, and the piston rod of lifting hydraulic cylinder 62 is stretched after the completion of single pole double acting hydraulic cylinder 44 resets
Out, rack gear 2 is engaged with the tooth 111 of turntable bearing outer ring 11 again, repeats above-mentioned movement, until variable pitch in place.It can carry out positive and negative
Bidirectional modulation.
Claims (7)
1. yawing pitch drive, including turntable bearing, the outer ring of the turntable bearing is equipped with tooth, which is characterized in that also wraps
It includes
Rack gear, the rack gear are located at the side of turntable bearing outer ring, and the rack gear is no less than two, and around the axis of turntable bearing
Annular array setting；
Lifting device, the rack gear are fixed on lifting device, and the lifting device is on rack gear and turntable bearing outer ring
Tooth is engaged and separates；And
Translation device, the lifting device are fixed on translation device, and the translation device is moved back and forth for drive rack, institute
Rack gear is stated for driving the outer ring rotating of turntable bearing.
2. yaw pitch drive according to claim 1, which is characterized in that
The lifting device includes
Sliding seat, the sliding seat are equipped with lifting groove, and the rack gear is slidably mounted in lifting groove, the sliding seat and translation
Device connection；And
Lifting hydraulic cylinder, the bottom of the lifting hydraulic cylinder are fixed on the bottom of lifting groove, the piston rod and tooth of lifting hydraulic cylinder
The bottom of item connects, and the piston rod of the lifting hydraulic cylinder retracts hour rack and separates with the tooth of turntable bearing outer ring, the lifting
The piston rod of hydraulic cylinder stretches out the tooth engagement of hour rack and turntable bearing outer ring.
3. yaw pitch drive according to claim 2, which is characterized in that
The lifting hydraulic cylinder is no less than two, and is symmetrical arranged.
4. fluid pressure type according to claim 2 yaws pitch drive, which is characterized in that
The translation device includes
Fixing seat is slided, the sliding fixing seat is equipped with sliding groove, and the sliding seat is slidably mounted in sliding groove；And
Single pole double acting hydraulic cylinder, the single pole double acting hydraulic cylinder are fixed on one end of sliding fixing seat, the single pole double cropping
It is connect with the piston rod of hydraulic cylinder with sliding seat.
5. fluid pressure type according to claim 2 yaws pitch drive, which is characterized in that
The translation device includes
Dual-rod hydraulic cylinder, the dual-rod hydraulic cylinder include translation hydraulic cylinder and translation piston rod, on the translation hydraulic cylinder
Equipped with sliding seat, the translation piston rod is slidably mounted on translation hydraulic cylinder；And
Cylinder body fixing seat, the cylinder body fixing seat are equipped with cylinder body sliding groove, and the translation hydraulic cylinder is slidably mounted on cylinder body
In sliding groove, the both ends of the translation piston rod are separately fixed at the both ends of cylinder body sliding groove.
6. yaw device, the yaw device include
Yaw pitch drive described in claim 1；
The outer ring of tower, the turntable bearing is fixed on the top of tower；And
Mainframe, the mainframe are fixed on the inner ring of turntable bearing, and the translation device is fixed on the bottom of mainframe, and
Positioned at the side of the outer ring of turntable bearing.
7. vane change device, the vane change device include
Yaw pitch drive described in claim 1；
The inner ring of wheel hub, the turntable bearing is fixed on wheel hub, and the translation device is fixed on wheel hub, and is located at turntable shaft
The side for the outer ring held；And
Fan blade, the fan blade are fixed on the outer ring of turntable bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289492.3A CN109882353A (en) | 2019-04-11 | 2019-04-11 | Yaw pitch drive and yaw device and vane change device using the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289492.3A CN109882353A (en) | 2019-04-11 | 2019-04-11 | Yaw pitch drive and yaw device and vane change device using the device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109882353A true CN109882353A (en) | 2019-06-14 |
Family
ID=66936946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910289492.3A Pending CN109882353A (en) | 2019-04-11 | 2019-04-11 | Yaw pitch drive and yaw device and vane change device using the device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109882353A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520016A (en) * | 2009-03-30 | 2009-09-02 | 浙江大学 | Changing hub of tide generating set |
| WO2013165047A1 (en) * | 2012-05-03 | 2013-11-07 | 주식회사 해성산전 | Yaw drive and pitch drive testing device for wind power generator |
| KR20140120461A (en) * | 2013-04-03 | 2014-10-14 | 삼성중공업 주식회사 | Yawing apparatus, wind power generator including the same and operating method thereof |
| CN205669455U (en) * | 2016-05-30 | 2016-11-02 | 常州易驱动电气科技有限公司 | A kind of blade of variablepiston |
| WO2016183942A1 (en) * | 2015-05-16 | 2016-11-24 | 张效新 | Linear rack-based rotor blade adjustment mechanism |
| CN206530441U (en) * | 2017-03-09 | 2017-09-29 | 山东科技大学 | A kind of new medium wind-driven generator hydraulic variable propeller system |
| CN206972433U (en) * | 2017-06-21 | 2018-02-06 | 北京金风科创风电设备有限公司 | Wind generating set pitch control device and wind power generating set |
| US20180057044A1 (en) * | 2016-08-26 | 2018-03-01 | Jilin University | Independent steering mechanism of controllable hydraulic locking type for left and right wheels |
| CN210290005U (en) * | 2019-04-11 | 2020-04-10 | 尉立 | Yaw variable pitch driving device, yaw device adopting same and variable pitch device |
-
2019
- 2019-04-11 CN CN201910289492.3A patent/CN109882353A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520016A (en) * | 2009-03-30 | 2009-09-02 | 浙江大学 | Changing hub of tide generating set |
| WO2013165047A1 (en) * | 2012-05-03 | 2013-11-07 | 주식회사 해성산전 | Yaw drive and pitch drive testing device for wind power generator |
| KR20140120461A (en) * | 2013-04-03 | 2014-10-14 | 삼성중공업 주식회사 | Yawing apparatus, wind power generator including the same and operating method thereof |
| WO2016183942A1 (en) * | 2015-05-16 | 2016-11-24 | 张效新 | Linear rack-based rotor blade adjustment mechanism |
| CN205669455U (en) * | 2016-05-30 | 2016-11-02 | 常州易驱动电气科技有限公司 | A kind of blade of variablepiston |
| US20180057044A1 (en) * | 2016-08-26 | 2018-03-01 | Jilin University | Independent steering mechanism of controllable hydraulic locking type for left and right wheels |
| CN206530441U (en) * | 2017-03-09 | 2017-09-29 | 山东科技大学 | A kind of new medium wind-driven generator hydraulic variable propeller system |
| CN206972433U (en) * | 2017-06-21 | 2018-02-06 | 北京金风科创风电设备有限公司 | Wind generating set pitch control device and wind power generating set |
| CN210290005U (en) * | 2019-04-11 | 2020-04-10 | 尉立 | Yaw variable pitch driving device, yaw device adopting same and variable pitch device |
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