CN102996345B - Variable pitch device of turbomachinery - Google Patents
Variable pitch device of turbomachinery Download PDFInfo
- Publication number
- CN102996345B CN102996345B CN201210573755.1A CN201210573755A CN102996345B CN 102996345 B CN102996345 B CN 102996345B CN 201210573755 A CN201210573755 A CN 201210573755A CN 102996345 B CN102996345 B CN 102996345B
- Authority
- CN
- China
- Prior art keywords
- centrifugal
- wheel hub
- centrifugal unit
- unit
- blade
- Prior art date
- 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
Links
Classifications
-
- 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
Abstract
The invention discloses a variable pitch device of turbomachinery. The variable pitch device comprises a connection disk, an intermediate pull rod, a reset spring, a hub, a positioning block, a centrifugal power mechanism and a variable pitch mechanism, the centrifugal power mechanism is composed of at least two centrifugal units, and the variable pitch mechanism is composed of at least two variable pitch units; each centrifugal unit comprises a centrifugal block, a force transmission sheet and a connection sheet and is respectively connected with the hub and the connection disk, and the centrifugal units are distributed along the rotation direction of the hub in a ring shape and not disturbed with each other; each variable pitch unit comprises a blade pull rod, a force arm sheet, a blade shaft, a blade and a fixing disk, the variable pitch units, the hub and the connection disk are installed together, and the blades of the variable pitch units are distributed along the rotation direction of the hub in a ring shape; and the rest spring is sleeved on the intermediate pull rod, one end of the reset spring is pressed on the outer side surface of the hub, the other end of the reset spring is in a threaded connection with one end of the intermediate pull rod through the positioning block with an inner thread hole, and the other end of the intermediate pull rod is fixedly connected with the connection disk.
Description
Technical field
The present invention relates to a kind of wind generating unit, relate in particular to a kind of impeller vane change device for wind-driven generator.
Background technique
At present, renewable energy sources reduces day by day, has caused serious destruction to environment simultaneously, and China pays much attention to the development of new energy, and wind energy is one of them part and parcel.In middle-size and small-size wind-driven generator, generally blade is fixed on wheel hub, its propeller pitch angle is constant, and the general efficiency of this blower fan is lower, resists strong wind ability poor simultaneously.At present, there is part producer to use and become the maximum utilization of oar technology realization to wind energy, but have the shortcomings such as mechanical pitch-controlled system is easy to wear, and reliability is low, easily damage.The shortcomings such as automatically controlled pitch-controlled system has poor stability, and cost is high, and the source of trouble is many.
Summary of the invention
The object of the invention is the deficiency for above technology, a kind of novel turbomachine vane change device is provided, thereby overcome the part or all of defect of prior art.
For achieving the above object, the technical solution used in the present invention is: wind power generator impeller machinery vane change device of the present invention comprises centrifugal power mechanism, blade pitch device, land, intermediate draw bar, Returnning spring, wheel hub and positioning block; Described centrifugal power mechanism is comprised of at least two centrifugal units, and each centrifugal unit comprises centrifugal-block, steel tape and connecting sheet; In each centrifugal unit, centrifugal-block is fixedly connected with steel tape, and steel tape is connected by joint bolt with connecting sheet; The steel tape of each centrifugal unit is arranged on wheel hub by joint bolt respectively, the connecting sheet of each centrifugal unit is arranged on land by joint bolt respectively, and each centrifugal unit distributes and the mutual noninterference when moving of each centrifugal unit ringwise along the sense of rotation of wheel hub; Described blade pitch device is comprised of at least two change oar unit, and each becomes oar unit and comprises blade pull bar, arm of force sheet, sharf, blade and fixed tray; In each becomes oar unit, sharf is inserted in the blades installation hole of wheel hub, and fixed tray is fixedly connected with wheel hub, and sharf is placed between fixed tray and wheel hub, and sharf and wheel hub can relatively rotate; Arm of force sheet is fixedly mounted on the root of sharf, and the top of sharf is fixedly connected with blade; One end of blade pull bar is connected with land by joint bolt, and the other end of blade pull bar is connected with arm of force sheet by joint bolt; Each becomes oar unit and distributes ringwise along the sense of rotation of wheel hub; Described Returnning spring is enclosed within on intermediate draw bar, one end of Returnning spring is pressed on the outer side surface of wheel hub, the other end of Returnning spring is fixed with the positioning block with interior threaded hole, described positioning block is connected with the externally threaded threaded one end of being processed with of intermediate draw bar, and the other end of intermediate draw bar is fixedly connected with land; The centrifugal-block of Returnning spring and each centrifugal unit divides the both sides that are positioned at wheel hub.
Further, centrifugal unit of the present invention and/or become oar unit described in each and be uniformly distributed ringwise along the sense of rotation of wheel hub.
Further, on wheel hub of the present invention, offer two above the first centrifugal unit mounting holes, each first centrifugal unit mounting hole distributes ringwise along the sense of rotation of wheel hub, and described in each, the steel tape of centrifugal unit is installed on respectively on the first corresponding centrifugal unit mounting hole.
Further, the steel tape of the present invention's centrifugal unit described in each is installed on the first corresponding centrifugal unit mounting hole by corresponding fitting seat respectively.
Further, on land of the present invention, offer two above the second centrifugal unit mounting holes, each second centrifugal unit mounting hole distributes ringwise along the sense of rotation of wheel hub, and the blade pull bar that becomes oar unit described in each is installed on respectively on the second corresponding centrifugal unit mounting hole.
Compared with prior art, the invention has the beneficial effects as follows: land of the present invention and intermediate draw bar are fixed, be connected with each blade pull bar that becomes oar unit simultaneously, during work, intermediate draw bar drives land to move axially, the axial displacement that makes respectively to become the blade pull bar of oar unit equates, and then the arm of force sheet corner that respectively becomes oar unit is equated, can guarantee that so all blade Windward angles are consistent; Structure comprises at least two centrifugal units, during rotation, can produce enough centrifugal force, and centrifugal unit is uniformly distributed and makes total balance simultaneously.When centrifugal-block rotates along with wheel hub, produce the centrifugal force of disalignment, centrifugal force pulls land by driver blade and dowel bar, and land deforms Returnning spring, drives all change oars unit simultaneously, thereby changes vaned Windward angle.When wheel speed reduces, Returnning spring plays reset response, and the elastic force of Returnning spring can promote land to mobile in the other direction, thereby the angle windward of blade is recovered.In whole process, the angle windward of blade can change with the variation of wind speed, can make like this impeller under each wind speed in angle windward preferably, guaranteed the safe, stable, efficiently of wind-driven generator operation.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
The structural drawing of Fig. 1 invention turbomachine vane change device;
Fig. 2 is the structural representation of centrifugal unit;
Fig. 3 is the structural representation that becomes oar unit;
Fig. 4 is the structural representation of wheel hub;
Fig. 5 is the internal structure schematic diagram (part) of turbomachine vane change device;
Fig. 6 is the structural representation of land.
Embodiment
As shown in Figure 1, turbomachine vane change device of the present invention comprises centrifugal power mechanism, blade pitch device, land 3, Returnning spring 4, intermediate draw bar 5, wheel hub 15 and positioning block 2.As shown in Figure 2, centrifugal power mechanism is comprised of at least two centrifugal units, and centrifugal unit is uniformly distributed ringwise along the sense of rotation of wheel hub 15 on wheel hub 15, mutual noninterference during each centrifugal unit operation.Each centrifugal unit is comprised of centrifugal-block 6, steel tape 7 and connecting sheet 8, and centrifugal-block 6 is fixedly connected with steel tape 7, and steel tape 7 is connected by joint bolt 16 with connecting sheet 8, and joint bolt 16 guarantees can relatively rotate between steel tape 7 and connecting sheet 8.The steel tape 7 of each centrifugal unit can be respectively installed on the first corresponding centrifugal unit mounting hole 19 by corresponding fitting seat 17.As shown in Figure 1, the steel tape 7 of each centrifugal unit is connected with the fitting seat 17 being fixed on wheel hub 15 by joint bolt 16, different from the fitting seat 17 that different steel tapes 7 are connected.Wherein, the mode that fitting seat 17 is threaded connection or the mode of welding are fixed on the first centrifugal unit mounting hole 19 of wheel hub 15, and preferably, the first centrifugal unit mounting hole 19 is uniformly distributed ringwise along the sense of rotation of wheel hub 15 on wheel hub.As shown in Figure 6, land 3 offers a plurality of the second centrifugal unit mounting holes 22, and preferably, each second centrifugal unit mounting hole 22 is uniformly distributed ringwise along the sense of rotation of wheel hub 15 on land 3; The second centrifugal unit mounting hole 22 is corresponding one by one with centrifugal unit, and land 3 is connected (referring to Fig. 1 and Fig. 2) with the connecting sheet 8 of a centrifugal unit by joint bolt 16 correspondingly at each the second centrifugal unit mounting hole 22 places.
As shown in Figure 3, blade pitch device is comprised of at least two change oar unit, and each becomes oar unit and is comprised of fixed tray 18, arm of force sheet 10, blade pull bar 9, sharf 11 and a blade 1.As shown in Figure 4, on wheel hub 15 along circumferentially spaced have in the 13(Fig. 4 of a plurality of blades installations hole exemplarily show 3 blades installation holes 13).Shown in Fig. 3 and Fig. 4, sharf 11 is inserted in corresponding blades installation hole 13, between sharf 11 and blades installation hole 13, can relatively rotate; Again fixed tray 18 is bolted on wheel hub 15, sharf 11 is placed between fixed tray 18 and wheel hub 15; Arm of force sheet 10 is fixed by bolts to the root of sharf 11, and blade 1 is fixed by bolts to the top of sharf 11; One end of blade pull bar 9 is connected with land 3 by joint bolt 16, and the other end of blade pull bar 9 is connected with arm of force sheet 10 by joint bolt 16.As shown in Figure 6, land 3 offers and becomes oar cellular installation hole 21, on land 3, is uniformly distributed ringwise, and the quantity that becomes oar cellular installation hole 21 equates with the quantity that becomes oar unit.Returnning spring 4 is enclosed within on intermediate draw bar 5; And, one end of Returnning spring 4 is pressed on the outer side surface of wheel hub 15, the other end of Returnning spring 4 is fixed with the positioning block 2 with interior threaded hole, positioning block 2 is connected with the externally threaded threaded one end of being processed with of intermediate draw bar 5, the other end of intermediate draw bar 5 is fixedly connected with land 3, and Returnning spring 4 divides with the centrifugal-block of each centrifugal unit the both sides that are positioned at wheel hub 15.As shown in Figure 6, the center of land 3 also offers intermediate draw bar mounting hole 20.Between each steel tape 7 and wheel hub 15, between each steel tape 7 and land 3, between land 3 and each blade pull bar 9, between arm of force sheet 10 and corresponding blade pull bar 9, all by joint bolt 16, connect, so can relatively rotate between them.As shown in Figure 4, wheel hub 15 comprises wheel hub matrix 14, wheel hub matrix 14 center has central shaft hole, on wheel hub matrix 14 along the sense of rotation interval of wheel hub 15 have a blades installation hole 13, thereby blades installation hole 13 is uniformly distributed ringwise along the sense of rotation of wheel hub 15; And the central axis in each blades installation hole 13 is mutually vertical with the central axis of the central shaft hole of wheel hub matrix 14; On wheel hub matrix 14, also the sense of rotation compartment of terrain along wheel hub 15 offers the first centrifugal unit mounting hole 19, the first centrifugal unit mounting hole 19 is uniformly distributed ringwise along the sense of rotation of wheel hub 15, and the central axis of each central axis of the first centrifugal unit mounting hole 19 and the central shaft hole of wheel hub matrix 14 is parallel to each other.On wheel hub matrix 14, be also provided with wheel hub stiffening rib 12.Shown in Fig. 4, be the wheel hub 15 that has the wind-driven generator of three blades 1, wheel hub 15 also has 3 blades installation holes 13 accordingly.The installation that has illustratively provided one of them centrifugal power unit and a change oar unit in Fig. 5 is related to schematic diagram.Fig. 6 is the structural representation of land 3, as shown in Figure 6, at the center of land 3, has intermediate draw bar attachment hole 20, and the central axis of the central shaft hole of the central axis of intermediate draw bar attachment hole 20 and wheel hub matrix 14 is parallel to each other; Excircle along intermediate draw bar attachment hole 20 on land 3 has a plurality of change oars unit attachment hole 21 and the second centrifugal unit attachment hole 22, and wherein, each becomes the periphery that oar unit attachment hole 21 is distributed in each second centrifugal unit attachment hole 22.Referring to Fig. 1 to Fig. 6, each central axis that becomes oar unit attachment hole 21 and the central axis of each the second centrifugal unit attachment hole 22 and the central shaft hole of wheel hub matrix 14 is parallel to each other, each becomes oar unit attachment hole 21 and each the second centrifugal unit attachment hole 22 and is uniformly distributed ringwise along the sense of rotation of wheel hub 15, finally makes each centrifugal unit and each become oar unit and is uniformly distributed ringwise along the sense of rotation of wheel hub 15.
Mechanical vane change device working principle of the present invention is to utilize centrifugal force drive vane axle 11 to rotate, and the variation of wind speed can cause the variation of wheel speed, thereby changes centrifugal force, and then changes angle windward.Specific works process is: when wind speed, lower than incision, blade 1 is in initial propeller pitch angle during wind speed, and now blade 1 can produce larger starting torque, is conducive to low wind speed and starts, after impeller starts, while increasing along with rotating speed, centrifugal power mechanism produces and becomes oar driving source, when centrifugal-block 6 is along with wheel hub 15 rotates, produce the centrifugal force of disalignment, centrifugal force pulls land 3 by driver blade 7 and dowel bar 8, land 3 deforms Returnning spring 4, by land 3, driven all change oars unit of blade pitch device simultaneously, make blade 1 rapidly in angle windward preferably, can guarantee the output power of the following blower fan of rated wind speed like this, land 3 is connected with each blade pull bar 9 that becomes oar unit simultaneously, during work, intermediate draw bar 5 drives land 3 to move axially, the axial displacement that makes respectively to become the blade pull bar 9 of oar unit equates, and then arm of force sheet 10 corners that respectively become oar unit are equated, can guarantee that so all blades 1 Windward angle is consistent, structure comprises at least two centrifugal units, during rotation, can produce enough centrifugal force, and centrifugal unit is uniformly distributed and makes total balance simultaneously.When surpassing rated wind speed, wheel speed slightly improves, and further changes propeller pitch angle, now can limit the driving moment of impeller, thereby has limited the further raising of rotating speed, makes total safety.When wheel speed reduces, Returnning spring 4 plays reset response, and the elastic force of spring promotes land 3 to mobile in the other direction, thereby the angle windward of blade 1 is recovered.Whole process, blade 1 windward angle can change with the variation of wind speed, can make like this impeller under each wind speed in angle windward preferably.
Overall structure of the present invention is simple, and response is instant; In the time of can realizing low wind speed, have and preferably start angle, during rated wind speed, make impeller in best tip-speed ratio, speed limit during high wind speed; Whole articulation structure is used wear-resisting joint shaft bearing, and long service life has been guaranteed the safe, stable, efficient of wind-driven generator operation.
Claims (7)
1. a wind power generator impeller machinery vane change device, is characterized in that: comprise centrifugal power mechanism, blade pitch device, land, intermediate draw bar, Returnning spring, wheel hub and positioning block;
Described centrifugal power mechanism is comprised of at least two centrifugal units, and each centrifugal unit comprises centrifugal-block, steel tape and connecting sheet; In each centrifugal unit, centrifugal-block is fixedly connected with steel tape, and steel tape is connected by joint bolt with connecting sheet; The steel tape of each centrifugal unit is arranged on wheel hub by joint bolt respectively, the connecting sheet of each centrifugal unit is arranged on land by joint bolt respectively, and each centrifugal unit distributes and the mutual noninterference when moving of each centrifugal unit ringwise along the sense of rotation of wheel hub;
Described blade pitch device is comprised of at least two change oar unit, and each becomes oar unit and comprises blade pull bar, arm of force sheet, sharf, blade and fixed tray; In each becomes oar unit, sharf is inserted in the blades installation hole of wheel hub, and fixed tray is fixedly connected with wheel hub, and sharf is placed between fixed tray and wheel hub, and sharf and wheel hub can relatively rotate; Arm of force sheet is fixedly mounted on the root of sharf, and the top of sharf is fixedly connected with blade; One end of blade pull bar is connected with land by joint bolt, and the other end of blade pull bar is connected with arm of force sheet by joint bolt; Each becomes oar unit and distributes ringwise along the sense of rotation of wheel hub;
Described Returnning spring is enclosed within on intermediate draw bar, one end of Returnning spring is pressed on the outer side surface of wheel hub, the other end of Returnning spring is fixed with the positioning block with interior threaded hole, described positioning block is connected with the externally threaded threaded one end of being processed with of intermediate draw bar, and the other end of intermediate draw bar is fixedly connected with land; The centrifugal-block of Returnning spring and each centrifugal unit divides the both sides that are positioned at wheel hub.
2. wind power generator impeller according to claim 1 machinery vane change device, is characterized in that: centrifugal unit and/or become oar unit described in each and be uniformly distributed ringwise along the sense of rotation of wheel hub described in each.
3. wind power generator impeller according to claim 1 and 2 machinery vane change device, it is characterized in that: on described wheel hub, offer two above the first centrifugal unit mounting holes, each first centrifugal unit mounting hole distributes ringwise along the sense of rotation of wheel hub, and described in each, the steel tape of centrifugal unit is installed on respectively on the first corresponding centrifugal unit mounting hole.
4. wind power generator impeller machinery vane change device according to claim 3, is characterized in that: described in each, the steel tape of centrifugal unit is installed on the first corresponding centrifugal unit mounting hole by corresponding fitting seat respectively.
5. wind power generator impeller according to claim 1 and 2 machinery vane change device, it is characterized in that: on described land, offer two above the second centrifugal unit mounting holes, each second centrifugal unit mounting hole distributes ringwise along the sense of rotation of wheel hub, and the blade pull bar that becomes oar unit described in each is installed on respectively on the second corresponding centrifugal unit mounting hole.
6. wind power generator impeller according to claim 3 machinery vane change device, it is characterized in that: on described land, offer two above the second centrifugal unit mounting holes, each second centrifugal unit mounting hole distributes ringwise along the sense of rotation of wheel hub, and the blade pull bar that becomes oar unit described in each is installed on respectively on the second corresponding centrifugal unit mounting hole.
7. wind power generator impeller according to claim 4 machinery vane change device, it is characterized in that: on described land, offer two above the second centrifugal unit mounting holes, each second centrifugal unit mounting hole distributes ringwise along the sense of rotation of wheel hub, and the blade pull bar that becomes oar unit described in each is installed on respectively on the second corresponding centrifugal unit mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210573755.1A CN102996345B (en) | 2012-12-26 | 2012-12-26 | Variable pitch device of turbomachinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210573755.1A CN102996345B (en) | 2012-12-26 | 2012-12-26 | Variable pitch device of turbomachinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102996345A CN102996345A (en) | 2013-03-27 |
| CN102996345B true CN102996345B (en) | 2014-09-24 |
Family
ID=47925347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210573755.1A Expired - Fee Related CN102996345B (en) | 2012-12-26 | 2012-12-26 | Variable pitch device of turbomachinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102996345B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0043872A1 (en) * | 1980-07-10 | 1982-01-20 | Paul Hayen | Pitch regulation device for the rotor vanes of a windmill |
| CN101457744A (en) * | 2008-12-25 | 2009-06-17 | 浙江华鹰风电设备有限公司 | Passive paddle changing wind power generator |
| CN201265487Y (en) * | 2008-05-29 | 2009-07-01 | 青岛安华新能源开发有限公司 | Flying bar synchronous variable-pitch mechanism |
| CN201810480U (en) * | 2010-07-07 | 2011-04-27 | 刘旭 | Centrifugal variable-pitch device for wind machines |
| CN202991345U (en) * | 2012-12-26 | 2013-06-12 | 浙江理工大学 | Turbomachinery variable pitch device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61258999A (en) * | 1985-05-09 | 1986-11-17 | Nippon Denso Co Ltd | Blowing device |
-
2012
- 2012-12-26 CN CN201210573755.1A patent/CN102996345B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0043872A1 (en) * | 1980-07-10 | 1982-01-20 | Paul Hayen | Pitch regulation device for the rotor vanes of a windmill |
| CN201265487Y (en) * | 2008-05-29 | 2009-07-01 | 青岛安华新能源开发有限公司 | Flying bar synchronous variable-pitch mechanism |
| CN101457744A (en) * | 2008-12-25 | 2009-06-17 | 浙江华鹰风电设备有限公司 | Passive paddle changing wind power generator |
| CN201810480U (en) * | 2010-07-07 | 2011-04-27 | 刘旭 | Centrifugal variable-pitch device for wind machines |
| CN202991345U (en) * | 2012-12-26 | 2013-06-12 | 浙江理工大学 | Turbomachinery variable pitch device |
Non-Patent Citations (1)
| Title |
|---|
| JP昭61-258999A 1986.11.17 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102996345A (en) | 2013-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2031273B1 (en) | Integrated medium-speed geared drive train | |
| US8696314B2 (en) | Gear set, wind turbine incorporating such a gear set and method of servicing a wind turbine | |
| CN201474863U (en) | Variable-pitch variable-speed wind turbine | |
| CN102418663B (en) | Variable pitch system for offshore high-power wind driven generator group and control method for variable pitch system | |
| US20090148285A1 (en) | Multi-section wind turbine rotor blades and wind turbines incorporating same | |
| CN203114522U (en) | Efficient and reliable wind power generation device | |
| WO2016173304A1 (en) | Novel wind turbine linkage variable pitch system | |
| CN101555871B (en) | Variable pitch and variable speed wind generating set | |
| CN101839218B (en) | Direct-drive wind generating set | |
| US5599168A (en) | Wind turbine adaptable to wind direction and velocity | |
| CN201187405Y (en) | Wind generating set hub | |
| US8338980B2 (en) | Wind turbine with single-stage compact drive train | |
| CN101806290B (en) | Megawatt double-wind-wheel wind power generation machine | |
| CN101915211A (en) | Wind turbine generator system and pitch system applied to same | |
| CN103867388A (en) | Electric direct-driven wind power variable pitch drive system | |
| CN203756446U (en) | Wind driven generator transmission structure | |
| US10018182B2 (en) | Turbine driven by wind or motor and method for generating electricity | |
| CN205370866U (en) | 2. 5MW wind generating set wheel hub | |
| CN107956644B (en) | Non-electric control turbine type medium-sized off-grid wind driven generator | |
| CN202991345U (en) | Turbomachinery variable pitch device | |
| CN201747516U (en) | Centrifugal variable-propeller hub of wind driven generator | |
| CN103835892A (en) | Transmission structure for wind driven generator | |
| CN102996345B (en) | Variable pitch device of turbomachinery | |
| CN101004167A (en) | High efficiency wind driven generator with vertical axis of petal type fan blades | |
| US20130343889A1 (en) | Friction Wheel Drive Train for a Wind Turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20140924 Termination date: 20151226 |
|
| EXPY | Termination of patent right or utility model |