CN103089553A - Articulated truss fixed variable pitch combined blade device - Google Patents
Articulated truss fixed variable pitch combined blade device Download PDFInfo
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- CN103089553A CN103089553A CN2013100177967A CN201310017796A CN103089553A CN 103089553 A CN103089553 A CN 103089553A CN 2013100177967 A CN2013100177967 A CN 2013100177967A CN 201310017796 A CN201310017796 A CN 201310017796A CN 103089553 A CN103089553 A CN 103089553A
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses an articulated truss fixed variable pitch combined blade device, and belongs to the technical field of wind power generation equipment. Each blade comprises a blade truss and a variable pitch blade body, wherein one end of the blade truss is connected on a fan hub through a truss articulated joint, the other end of the blade truss is connected with the variable pitch blade body through a connection driving device, and the variable pitch blade body revolves around a central shaft of the variable pitch blade body. The middle portions of all the blade trusses are mutually tightened through truss draw bars, and the outer end portions of all the blade trusses are tightened through truss inhaul cables. Due to the fact that each blade is in an articulated truss draw bar structure, the stress condition of the root of the blade is greatly improved; and moreover, the variable pitch blade body at the front end of each blade is compact in structure and light in weight, and therefore connecting devices of the variable pitch blade bodies are enabled to be simple, a transmission chain is shortened, and needed driving power is low. The two sections of blades of the articulated truss fixed variable pitch combined blade device can be manufactured and assembled separately, and therefore the articulated truss fixed variable pitch combined blade device has the advantages of being simple in structure, convenient to assemble and maintain on site, simple and convenient to control and high in safety, and is especially suitable for large and super large blade units.
Description
Technical field
The present invention relates to the blades of large-scale wind driven generator structure, belong to technical field of wind power generating equipment.
Background technique
Current most of energy sources is fossil fuel: coal, oil and rock gas, and with present operating speed, known residue colliery mineral reserve will approximately run out after 200 years, and oil and natural gas will use totally in less than 100 years.Fossil fuel can cause a large amount of environmental pollutions in use, comprising the greenhouse gases that cause global warming.Wind energy is one of tool business potential, most active renewable energy sources, uses cleaning, and cost is lower, and takes endless.It is large that wind-power electricity generation has the electric motor power growth space, and cost descends fast, and safety, the energy such as never exhaust at the advantage.Wind-power electricity generation can effectively be alleviated atmospheric pollution, water pollution and global warming issue when the stable power supply is provided for economic growth.In all kinds of new energy developments, wind-power electricity generation is the generation mode that technology is relatively ripe and have large-scale development and business development condition, wind-power electricity generation can reduce a large amount of pollutants and the carbon emission that the fossil fuel generating produces, and the large-scale promotion wind-powered electricity generation can be made positive contribution for energy-saving and emission-reduction.Under global energy crisis and the day by day serious background of environmental crisis, wind energy resources begins to be subject to common concern.The wind-power electricity generation large-scale development provides the wide market space and prospect to the wind-power electricity generation equipment manufacture.According to estimates, global potential wind-power electricity generation ability surpasses 70,000,000,000,000 kilowatts, than also large 10 times of the water energy total amounts that can develop on the earth.Along with following conventional energy resource cost continues to rise, the wind-powered electricity generation advantage is more obvious, and development can be faster, estimates that in years ahead, the installed capacity of wind-driven power average annual growth rate will be up to 20%.According to the report of GWEC, the installed capacity of wind-driven power of the states such as Germany, Spain, the U.S., India, Denmark, Italy, Britain, Holland, China, Japan and Portugal is relatively many at present.The global industry blue book of international green peace organization and WWEA's issue is thought, to reach 12.6 hundred million kilowatts to the year two thousand twenty whole world wind energy electric motor power, the wind-powered electricity generation electric weight reaches 3.1 trillion kilowatt hours when the time comes, wind-powered electricity generation will account for the 12%(while of world's power supply, and this clean energy resource will reduce the approximately CO2 emission of 11,000,000,000 tons).
Can find out, comprise that the utilization of the renewable energy sources of solar energy, wind energy, biomass energy etc. has entered a brand-new developing period, wind energy is considered to be hopeful most the clean energy resource that contends with traditional energy on cost of electricity-generating.The average single-machine capacity of the European countries such as Britain, Denmark wind-powered electricity generation unit has reached 2.5 megawatts, Chinese average out to 1.6 megawatts.The installation cost of offshore wind turbine is higher, and therefore large-scale unit more has cost advantage, and the 6MW blower fan of Denmark Vestas is about to come into operation, and U.S. Clipper company has developed the 10MW model machine, and offshore wind farm MW class unit of future generation will reach 6MW to 10MW.
China in Recent Years wind-powered electricity generation industry presents explosive the growth, from 2005 the year electric motor powers less than 1000MW, surpass 14000MW to year electric motor power in 2009, five years increased by 14 times, during " 12 ", the newly-increased installed capacity of wind-driven power of (2011-2015) China will reach 40000MW, and China has become the wind-powered electricity generation big country of attracting attention in the whole world.
Wind-power electricity generation from 19 end of the centurys to 20 beginnings of the century is all small-scale DC generation, until just begin to realize the maximization of wind power generating set first half in 20th century, and increase output power by improving aerodynamic quality.To phase late 1990s, the wind power generating set of wide-scale adoption 1MW-1.5MW.Enter 21 century, the power of wind power generating set and rotor diameter are tending towards maximizing more, and rotor diameter reaches the wind-driven generator that 60-80m, output power reach 2MW and consists of leading unit, and simultaneously, offshore wind turbine also maximizes more.
Now, the state-of-the-art technology of wind-power electricity generation and development trend present the development trends such as maximization, variable-speed operation, feather and non-gear box, namely
One, aspect maximization, the wind-powered electricity generation unit of MW class has possessed commercialization value now, its single-machine capacity can reach 2～3MW, the marine single-machine capacity of maximum wind-powered electricity generation unit can reach 5MW at present, wind wheel blade length is also greater than 30m, the weight of generator set is also heavier, must and install and bring larger difficulty in transportation, and the safety of structure of wind-powered electricity generation unit when strong wind also faces larger risk.
Two, aspect variable-speed operation, namely compare with the wind power generating set of constant-speed operation, the blower fan of variable-speed operation has that generated energy is large, adaptability that wind speed is changed is good, cost of production is low, the efficient advantages of higher, but for large fan, because blade is long and heavier, will be a difficult point for the control of its inertia.
Three, in feather design and operating aspect; at present fixed pitch is to the feather future development; the advantage that feather is regulated is that the startup of unit performance is good, stable output power, set structure stressed little, shut down convenient and safe; but the mechanism of feather is comparatively complicated; also increased the probability of failure of vane change device, the control program more complicated.In conjunction with the application of feather technology and the development of Power Electronic Technique, mostly wind-powered electricity generation unit development manufacturer brings into use the variable speed constant frequency technology, and has developed variable-pitch variable-speed wind-powered electricity generation unit, makes to have had in the wind energy conversion and further improves and improve
Four, aspect non-gear box (directly driving type), namely adopt the mode of directly driving of non-gear box, can effectively improve efficient and the operational reliability of system, but need the slow-revving generator techniques of development.
Five, aspect blade technology, the aerofoil profile of wind generator set blade was from adopting originally the aerofoil profile of aircraft wing, develop into most recently used specially for the aerofoil profile of wind-driven generator, and count at low Reynolds and obtain higher ratio of lift coefficient to drag coefficient in scope, compare with the aerofoil profile of aircraft utilization, aerofoil profile thickening, the intensity of blade and rigidity also improve widely.
Only with regard to blade, there is following deficiency in current large-scale wind generating equipment: the size of large-scale blade is more and more longer, this proposes more and more higher requirement to blade material weight, intensity and rigidity, simultaneously, also brings very large difficulty to transportation, installation, maintenance; Therefore; for the manufacturing of large-scale blade and installation, for the complexity of existing blade pitch device, for the stability of output power in unit running process, for the startability of unit and shut down the aspect such as convenient and safe property, study novel blade technology and be one of the key problem in technology of the large-scale and super sized type blade structure of Developing and difficult point.
Summary of the invention
The hinge truss that purpose of the present invention is intended to propose for large-scale wind driven generator becomes the blade sheet surely, mainly adopts the two-part combined blade, solves manufacturing and the packing problem of large-scale blade; Adopt the hinge truss structure, and successively the blade truss is strained by truss rod and drag-line, improve the stress of blade; By front end being become rotation and the control of blade sheet, be rotated easily the adjusting of moment for different wind regime.
Technological scheme of the present invention is as follows:
A kind of hinge truss becomes oar combined blade device surely, contain axial fan hub and at least three blades, it is characterized in that: each blade contains the blade truss and becomes the blade sheet, one end of described blade truss is connected on axial fan hub by the truss articulated joint, the other end is connected with change blade sheet by connecting drive device, described change blade sheet is rotation blade, rotates around the blade central axis; Each blade truss is strained by truss rod at the position therebetween mutually, and each blade truss is strained by the truss drag-line mutually in its outer end, on every truss drag-line, draught spring is housed.
Technical characteristics of the present invention also is: described blade truss comprises many truss members, truss angle connecting sheet, truss member connecting bolt and truss end plate; The two ends of every truss member are all passed through the truss member connecting bolt and are connected with truss angle connecting sheet, and truss angle connecting sheet connects and form truss with many truss members.
Technical characteristics of the present invention also is: described connecting drive device comprises that change oar drive motor, change oar actuation gear, worm screw connect gear, worm screw, worm gear, worm gear link press span, pitch variable bearings, load-bearing frame and change oar adpting flange; Become the oar drive motor and be arranged on the inside of load-bearing frame by the drive motor fixing device, the output shaft that becomes the oar drive motor is connected with change oar actuation gear, become the oar actuation gear and be connected engaged gears with worm screw, worm screw connects gear and is fixed on worm screw, the two ends of worm screw are affixed with worm screw termination bearing inner ring respectively, and the outer shroud of worm screw termination bearing is connected on load-bearing frame by the worm screw connecting bolt; Worm gear is connected with ring in pitch variable bearings by the worm gear link press span; The outer shroud of pitch variable bearings is connected with load-bearing frame; Become the oar adpting flange and be connected with the interior ring of pitch variable bearings, become the blade sheet and be fixedly connected with change oar adpting flange; The truss end plate of described load-bearing frame and blade truss is fixedly linked.
Technical characteristics of the present invention also is: described blade truss length is 1:0.3～1:0.5 with the ratio that becomes the oar length of blade.
Technical characteristics of the present invention also is: the outside of described connecting drive device is coated by the connection set cowling, and the section configuration of connection set cowling is consistent with the section configuration that becomes the blade sheet.
The present invention has following characteristics and outstanding effect: 1. adopt two-part, be convenient to manufacturing and the assembling of large-scale blade compared with prior art; 2. adopt the hinge truss structure, and successively the blade truss is strained by truss rod and drag-line, improved the stress of blade; 3. become the blade sheet lighter, control is simple and precision is high, and easy to startup and the shutdown control of blade, the power of needed drive motor is less; 4. can adopt drive motor and transmitting gear to drive and become the blade sheet, and not need complicated blade pitch device; 5. become the front end that the blade sheet is positioned at combined blade, the Torque-adjusting role that produces when becoming oar and efficient is highly significant all; Only into due to the effect of front end blade, intensity and the complexity of its load greatly reduce the load that the connection set of the change blade sheet that 6. adopts bears, and therefore, integral blade has higher Security.
Description of drawings
Fig. 1 is that a kind of hinge truss provided by the invention becomes oar combined blade device schematic diagram surely.
Fig. 2 is the structural representation of blade truss and connecting drive device.
Fig. 3 is that the hinge truss becomes oar combined blade connecting drive device internal structure schematic diagram surely.
In figure: the 1-axial fan hub; 2-blade truss; 3-becomes the blade sheet; The 4-connecting drive device; The 5-truss rod; 6-truss drag-line; The articulated joint of 7-truss; 8-connection set cowling; 9-blower fan front shroud; The 10-truss member; 11-truss angle connecting sheet; The 12-pitch variable bearings; 13-truss end plate; The 14-load-bearing frame; 15-becomes the oar drive motor; The 16-output shaft; 17-becomes the oar actuation gear; The 18-worm screw connects gear; The 19-worm screw; 20-worm screw termination bearing; 21-worm screw connecting bolt; 22-drive motor fixing device; 23-end plate connecting bolt; Ring in the 24-pitch variable bearings; 25-worm gear link press span; Ring connecting bolt in 26-; The 27-draught spring; 28-load-bearing frame and bearing connecting bolt; 29-flange and change oar connecting bolt; 30-truss member connecting bolt; 31-becomes blade sheet bolt link position; 32-becomes blade sheet central axis; The 33-worm gear; 34-becomes the oar adpting flange.
Embodiment
Below in conjunction with accompanying drawing, structure of the present invention and embodiment are further described:
Fig. 1 is that a kind of hinge truss provided by the invention becomes oar combined blade device schematic diagram surely, and described device contains axial fan hub 1, blade truss 2, becomes the connecting drive device 4 of blade sheet 3 and change blade sheet; Each blade contains blade truss 2 and becomes blade sheet 3, one end of blade truss 2 is connected on axial fan hub 1 by truss articulated joint 7, the other end is connected with change blade sheet 3 by connecting drive device 4, each blade truss 2 position is therebetween strained mutually by truss rod 5, mutually strain by truss drag-line 6 in its outer end, for the pulling force that prevents drag-line fluffs, draught spring 27 is housed on every drag-line; Become blade sheet 3 and is connected with blade truss 2 by connecting drive device 4, become the blade sheet and be rotation blade, blade truss 2 length are 1:0.3～1:0.5 with the ratio that becomes blade sheet 3 length, and the area of blade truss and change blade sheet institute sweeping is basic identical with making.Be the layout of two-part due to blade, can carry out manufacturing and the transportation of segmentation, will greatly reduce the difficulty of manufacturing, transportation and the installation of blade.
Fig. 2 is the structural representation of blade truss and connecting drive device, and Fig. 3 is that the hinge truss becomes blade sheet connecting drive device internal structure schematic diagram surely.Blade truss 2 comprises many truss members 10, truss angle connecting sheet 11, truss member connecting bolt 30 and truss end plate 13; The two ends of every truss member 10 are all passed through truss member connecting bolt 30 and are connected with truss angle connecting sheet 11, and truss angle connecting sheet 11 connects and form truss with many truss members 10.
described connecting drive device 4 comprises that change oar drive motor 15, change oar actuation gear 17, worm screw connect gear 18, worm screw 19, worm gear 33, worm gear link press span 25, pitch variable bearings 12, load-bearing frame 14 and become oar adpting flange 34, become oar drive motor 15 and be arranged on the inside of load-bearing frame 14 by drive motor fixing device 22, becoming oar drive motor 15 is connected with change oar actuation gear 17 by motor output shaft 16, become oar actuation gear 17 and be connected gear 18 interlocks with worm screw, worm screw connects gear 18 and is fixed on worm screw 19, the two ends of worm screw 19 are affixed with worm screw termination bearing 20 interior rings respectively, the outer shroud of worm screw termination bearing 20 is connected on load-bearing frame 14 by worm screw connecting bolt 21, worm screw 19 and worm gear 33 interlocks, worm gear 33 is connected with ring 24 in pitch variable bearings by worm gear link press span 25 and interior ring connecting bolt 26, the outer shroud of pitch variable bearings 12 is connected with load-bearing frame 14 with bearing connecting bolt 28 by load-bearing frame, become oar adpting flange 34 and be connected with the interior ring of pitch variable bearings 12, and be connected with change blade sheet 3 with change oar connecting bolt 29 by flange, described load-bearing frame 14 is fixedly linked by the truss end plate 13 of end plate connecting bolt 23 with blade truss 2, the outside of the connecting drive device 4 of whole change blade sheet is coated by connection set cowling 8.
As shown in Figure 3, become oar drive motor 15 and drive by output shaft 16 and 17 pairs of worm screws connection gears 18 of change oar actuation gear, drive worm screw 19 and rotate, then drive worm gear 33 by worm screw 19, thereby the change blade sheet 3 that is rotatably supported on pitch variable bearings 12 rotates.
When fan starting needs larger startup running torque, start and become oar drive motor 15, connecting gear 18, worm screw 19 and 33 pairs of change blade sheets 3 of worm gear by motor output shaft 16, change oar actuation gear 17, worm screw drives, make and become blade sheet 3 around becoming 32 rotations of blade sheet central axis, can turn to larger Windward angle, to obtain maximum startup running torque.When blower fan is in larger wind-force, make change blade sheet 3 turn to a less Windward angle with starting change oar drive motor 15, can obtain a comparatively stable running torque, comparatively steady with the output power that ensures blower fan.When running into especially big wind regime, if need to make blade be in the state of braking or safety protection, can start change oar drive motor 15 and make change blade sheet 3 carry out backward rotation, to obtain a reverse running torque, play the effect of slowing down or braking; Compare with blade truss 2, the size that becomes blade sheet 3 is less, and weight is lighter, and therefore, the precision that becomes oar adjusting control is higher, and the inertial force of adjusting is also less, and the Security of integral blade is also higher.
Claims (5)
1. a hinge truss becomes oar combined blade device surely, contain axial fan hub (1) and at least three blades, it is characterized in that: each blade contains blade truss (2) and becomes blade sheet (3), one end of described blade truss (2) is connected on axial fan hub (1) by truss articulated joint (7), the other end is connected with change blade sheet (3) by connecting drive device (4), described change blade sheet (3) is rotation blade, around becoming blade sheet central axis (32) rotation; Each blade truss (2) position is therebetween strained mutually by truss rod (5), each blade truss (2) by truss drag-line (6) tension mutually, is equipped with draught spring (27) in its outer end on every truss drag-line (6).
2. surely become oar combined blade device according to a kind of hinge truss claimed in claim 1, it is characterized in that: blade truss (2) comprises many truss members (10), truss angle connecting sheet (11), truss member connecting bolt (30) and truss end plate (13); The two ends of every truss member (10) are all passed through truss member connecting bolt (30) and are connected with truss angle connecting sheet (11), and truss angle connecting sheet (11) connects and form truss with many truss members (10).
3. surely become oar combined blade device according to a kind of hinge truss claimed in claim 1, it is characterized in that: described connecting drive device (4) comprises that change oar drive motor (15), change oar actuation gear (17), worm screw connect gear (18), worm screw (19), worm gear (33), worm gear link press span (25), pitch variable bearings (12), load-bearing frame (14) and become oar adpting flange (34); become oar drive motor (15) and be arranged on the inside of load-bearing frame (14) by drive motor fixing device (22), the output shaft (16) that becomes oar drive motor (15) is connected with change oar actuation gear (17), become oar actuation gear (17) and be connected gear (18) interlock with worm screw, worm screw connects gear (18) and is fixed on worm screw (19), the two ends of worm screw (19) are affixed with the interior ring of worm screw termination bearing (20) respectively, the outer shroud of worm screw termination bearing (20) is connected on load-bearing frame (14) by worm screw connecting bolt (21), worm gear (33) is connected with ring (24) in pitch variable bearings by worm gear link press span (25), the outer shroud of pitch variable bearings (12) is connected with load-bearing frame (14), become oar adpting flange (34) and be connected with the interior ring of pitch variable bearings (12), become blade sheet (3) and be fixedly connected with change oar adpting flange (34), described load-bearing frame (14) is fixedly linked with the truss end plate (13) of blade truss (2).
4. surely become oar combined blade device according to a kind of hinge truss claimed in claim 1, it is characterized in that: described blade truss (2) length is 1:0.3～1:0.5 with the ratio that becomes blade sheet (3) length.
5. surely become oar combined blade device according to a kind of hinge truss claimed in claim 1, it is characterized in that: the outside of described connecting drive device (4) is coated by connection set cowling (8), and the section configuration of connection set cowling (8) is consistent with the section configuration that becomes blade sheet (3).
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| CN2013100177967A CN103089553A (en) | 2013-01-17 | 2013-01-17 | Articulated truss fixed variable pitch combined blade device |
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| CN2013100177967A CN103089553A (en) | 2013-01-17 | 2013-01-17 | Articulated truss fixed variable pitch combined blade device |
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Cited By (10)
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|---|---|---|---|---|
| CN104454376A (en) * | 2013-09-22 | 2015-03-25 | 王智勇 | Wind power generator blade with supporting device |
| CN104612896A (en) * | 2014-12-12 | 2015-05-13 | 西北工业大学 | Offshore wind power generation typhoon-resistance control system |
| CN105673326A (en) * | 2016-03-15 | 2016-06-15 | 西北工业大学 | Fan blade linkage variable pitch device |
| CN105736240A (en) * | 2016-03-15 | 2016-07-06 | 西北工业大学 | Fan blade steel cable connecting device in mechanical braking state |
| CN105736239A (en) * | 2016-03-15 | 2016-07-06 | 西北工业大学 | Fan blade steel cable connecting device in release state of mechanical braking system |
| WO2016156623A1 (en) * | 2015-03-31 | 2016-10-06 | Nabrawind Sl | New hub of a wind turbine |
| CN106499576A (en) * | 2016-02-29 | 2017-03-15 | 朱克彦 | Low wind speed is from pitch-controlled wind-driven generator impeller and low wind speed from pitch-controlled wind-driven generator |
| CN108194285A (en) * | 2017-12-21 | 2018-06-22 | 中交三航（上海）新能源工程有限公司 | A kind of offshore wind farm impeller high-altitude method for dismounting and its method for dismounting adjustable center of gravity tooling |
| CN109973292A (en) * | 2019-03-25 | 2019-07-05 | 国电联合动力技术有限公司 | Wind generator set blade, impeller and wind power generating set |
| CN110030147A (en) * | 2019-04-17 | 2019-07-19 | 戚永维 | A kind of wind-driven generator shaft pitch full leaf point impeller |
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| CN104612896A (en) * | 2014-12-12 | 2015-05-13 | 西北工业大学 | Offshore wind power generation typhoon-resistance control system |
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| CN106499576B (en) * | 2016-02-29 | 2023-06-20 | 朱克彦 | Impeller of low-wind-speed self-variable-pitch wind-driven generator and low-wind-speed self-variable-pitch wind-driven generator |
| CN105736240A (en) * | 2016-03-15 | 2016-07-06 | 西北工业大学 | Fan blade steel cable connecting device in mechanical braking state |
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| CN109973292A (en) * | 2019-03-25 | 2019-07-05 | 国电联合动力技术有限公司 | Wind generator set blade, impeller and wind power generating set |
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Application publication date: 20130508 |