CN102536683B - Zonal guy cable device used for enhancing blade stability of large-scale wind driven generator - Google Patents
Zonal guy cable device used for enhancing blade stability of large-scale wind driven generator Download PDFInfo
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- CN102536683B CN102536683B CN201210017510.0A CN201210017510A CN102536683B CN 102536683 B CN102536683 B CN 102536683B CN 201210017510 A CN201210017510 A CN 201210017510A CN 102536683 B CN102536683 B CN 102536683B
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Abstract
A zonal guy cable device used for enhancing the blade stability of a large-scale wind driven generator comprises blade, a fan wheel hub, a fan main shaft, a zonal guy cable system and a guy cable tension adjusting system. The zonal guy cable system transmits the tension to the front end of a fan through longitudinal tension transmitting guy cables and steering supports, and carries out tension adjustment and control on the tension through the guy cable tension adjusting system, so that the blades have rather high rigidity along the rotating circumference, and have great improvements on vibration resistance and wind resistance, and particularly, the zonal guy cable device is suitable for the large-scale wind driven generator with more than three blades. The zonal guy cable device provided by the invention enables the large-scale wind driven generator to adopt lighter and longer blades with better stability, has the characteristics of convenience for site operation and maintenance, controllable stress state and high safety, and is particularly suitable for design and construction of large-scale and extra-large-scale blades.
Description
Technical field
The present invention relates to the modular blades of large-scale wind driven generator structure of bleeding of filling, belong to wind power plant field.
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 run out after approximately 200 years, and oil and natural gas will be used 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 cleanly, and cost is lower, and takes endless.It is large that wind-power electricity generation has electric motor power growth space, and cost declines fast, and safety, the energy such as never exhaust at the advantage.Wind-power electricity generation, when stable power supply is provided for economic growth, can effectively be alleviated atmospheric pollution, water pollution and global warming issue.In all kinds of new energy developments, wind-power electricity generation is that technology is relatively ripe and have a generation mode of large-scale development and business development condition, wind-power electricity generation can reduce a large amount of pollutants and the carbon emission that fossil fuel generating produces, and 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 starts to be subject to common concern.Wind-power electricity generation large-scale development provides the wide market space and prospect to 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, wind-powered electricity generation advantage is more obvious, and development can be faster, estimates that in years ahead, 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 current Germany, Spain, the U.S., India, Denmark, Italy, Britain, Holland, China, Japan and Portugal is relatively many.The global industry blue book of international green peace organization and WWEA's issue is thought, to the wind energy electric motor power of the year two thousand twenty whole world, will reach 12.6 hundred million kilowatts, wind-powered electricity generation electric weight reaches 3.1 trillion kilowatt hours when the time comes, 12% (meanwhile, this clean energy resource is by the CO2 emission that reduces approximately 11,000,000,000 tons) of wind-powered electricity generation Jiang Zhan world's power supply.
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 contending with in cost of electricity-generating with traditional energy.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 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 growth, from 2005 year electric motor power less than 1000MW, to year electric motor power in 2009, surpass 14000MW, 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 start 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 meanwhile, 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,
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, compare with the wind power generating set of constant-speed operation, the blower fan of variable-speed operation has that generated energy adaptability large, that wind speed is changed is good, cost of production is low, efficiency advantages of higher, but for large fan, because blade is long and heavier, for the control of its inertia, will be a difficult point.
Three, in feather design and operating aspect; at present fixed pitch is to feather future development; the advantage that feather regulates is that 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, control program more complicated.In conjunction with the application of feather technology and the development of Power Electronic Technique, wind-powered electricity generation unit development manufacturer brings into use variable speed constant frequency technology mostly, and has developed variable-pitch variable-speed wind-powered electricity generation unit, and make has had and further improved and improve in wind energy conversion
Four, aspect non-gear box (directly driving type), adopt the mode of directly driving of non-gear box, efficiency and the operational reliability of system can be effectively improved, but slow-revving generator techniques need to be developed.
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 and in scope, obtain higher ratio of lift coefficient to drag coefficient at low Reynolds, 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, and this proposes more and more higher requirement to blade material weight, intensity and rigidity, although large-scale blade can improve the utilization ratio of wind energy, because vaned one end is only fixed on the wheel hub of blower fan, for typical cantilever structure, sense of rotation at blade, its ratio of rigidity a little less than, must bring and carry the high vibration causing because of wind, equally, blade also bears the larger load along wind direction, running under the effect of extreme wind power, by the hidden danger of bringing in safety, in a word, relatively large blade, it is integrally-built circumferential and all poor along the stability on wind direction, the global stability that how to increase substantially blade structure is the key issue of the large-scale and super sized type blade structure of Developing.
Summary of the invention
Object of the present invention is intended to propose for strengthening the broadwise cable arrangement of blades of large-scale wind driven generator stability, main adopt broadwise cable systems improve blade along revolution to and the rigidity of wind direction, can increase substantially anti-vibration and the wind load resistance ability of blade, be particularly suitable for having 3 above large-scale blade systems.
Technological scheme of the present invention is as follows:
A kind of for strengthening the broadwise cable arrangement of blades of large-scale wind driven generator stability, described large-scale wind driven generator contains three above blade, axial fan hub and blower fan main shafts, described blade is connected with axial fan hub, axial fan hub is arranged on blower fan main shaft, it is characterized in that: described broadwise cable arrangement comprises broadwise cable systems, cable-tension regulating system and is arranged on the first connection set on each blade; Described broadwise cable systems comprises broadwise first layer drag-line and warp-wise drag-line land; Described cable-tension regulating system contains weft tension screw regulator, automatic controller and is fixed on the preposition stretch-draw load axle on blower fan main shaft, and automatic controller is connected with weft tension screw regulator by guide line; Broadwise first layer drag-line connects the middle part of the first connection set on each blade successively; Warp-wise power transmission drag-line is connected the mid point of first layer drag-line between every two blades, and be connected with warp-wise drag-line land after turning to by the static pulley on drag-line turning rack, the inside of weft tension screw regulator is connected with preposition stretch-draw load axle by screw thread, and the outside bearing that adopts is connected with warp-wise drag-line land.
Technical characteristics of the present invention is also: described broadwise cable arrangement also comprises the second connection set and broadwise second layer drag-line, and broadwise second layer drag-line connects the middle part of the second connection set on each blade successively; Warp-wise power transmission drag-line is connected the mid point of first layer and second layer broadwise drag-line between every two blades, and is connected with warp-wise drag-line land after turning to by the static pulley on drag-line turning rack.
The present invention compared with prior art, for thering are 3 above large-scale blade wind powered generator systems, there is following characteristics and high-lighting effect: the circumferential rigidity that 1. can increase substantially blade by one or more layers broadwise cable systems, increase the mechanical property of the anti-vibration of blade, integrity and the reliability that 2. can keep whole blade system, for the safe operation of large-scale blade or super sized type blade provides a kind of new drag-line reinforcing mode.
Accompanying drawing explanation
Fig. 1 is embodiment's schematic diagram of one deck broadwise cable arrangement provided by the invention.
Fig. 2 is the rear view of the cable arrangement of Fig. 1.
Fig. 3 is embodiment's schematic diagram of double-deck broadwise cable arrangement provided by the invention.
Fig. 4 is the rear view of the cable arrangement of Fig. 3.
In figure: 1-blade; 2-axial fan hub; 3-blower fan main shaft; 6-broadwise first layer drag-line; 7-broadwise second layer drag-line; 8-warp-wise power transmission drag-line; 9-drag-line turning rack; The preposition stretch-draw load of 10-axle; 11-the first connection set; 12-the second connection set; 15-warp-wise drag-line land; 16-weft tension screw regulator; 18-weft tension screw regulator moving direction; 19-automatic controller.
Embodiment
Below in conjunction with accompanying drawing, structure of the present invention and embodiment are further described:
Fig. 1 and Fig. 2 are the example structure schematic diagram of one deck broadwise cable arrangement provided by the invention, described large-scale wind driven generator contains three above blade 1, axial fan hub 2 and blower fan main shafts 3, described blade 1 is connected with axial fan hub 2, and axial fan hub 2 is arranged on blower fan main shaft 3; This broadwise cable arrangement comprises broadwise cable systems, cable-tension regulating system and is arranged on the first connection set 11 on each blade; Described broadwise cable systems contains one deck drag-line, broadwise first layer drag-line 6 connects the middle part of the first connection set 11 on each blade successively, warp-wise power transmission drag-line 8 is connected the mid point of broadwise drag-line between every two blades, and is connected with warp-wise drag-line land 15 after turning to by the static pulley on drag-line turning rack 9; The preposition stretch-draw load axle 10 that described cable-tension regulating system contains weft tension screw regulator 16, automatic controller 19 and is fixed on blower fan main shaft 3, the inside of weft tension screw regulator 16 is connected with preposition stretch-draw load axle 10 by screw thread, the outside bearing that adopts is connected with warp-wise drag-line land 15, and automatic controller 19 is connected with weft tension screw regulator 16 by guide line.
Fig. 3 and Fig. 4 are the example structure schematic diagram of double-deck broadwise cable arrangement provided by the invention, comprise broadwise cable systems, cable-tension regulating system and are arranged on the first connection set 11 and the first connection set 12 on each blade; Described broadwise cable systems contains double-layer cable, broadwise first layer drag-line 6 connects the middle part of the first connection set 11 on each blade successively, broadwise second layer drag-line 7 connects the middle part of the second connection set 12 on each blade successively, warp-wise power transmission drag-line 8 is connected the mid point of first layer and second layer broadwise drag-line between every two blades, and is connected with warp-wise drag-line land 15 after turning to by the static pulley on drag-line turning rack 9; The preposition stretch-draw load axle 10 that described cable-tension regulating system contains weft tension screw regulator 16, automatic controller 19 and is fixed on blower fan main shaft 3, the inside of weft tension screw regulator 16 is connected with preposition stretch-draw load axle 10 by screw thread, the outside bearing that adopts is connected with warp-wise drag-line land 15, and automatic controller 19 is connected with weft tension screw regulator 16 by guide line.
With the embodiment of the double-deck broadwise cable arrangement shown in Fig. 3, provide the installation and adjustment explanation of cable arrangement below.At erection stage, first according to designing requirement, the first connection set 11 and the second connection set 12 are arranged on blade, warp-wise drag-line land 15 is connected with the preposition stretch-draw load axle 10 being fixed on blower fan main shaft 3 by bearing and weft tension screw regulator 16, automatic controller 19 is arranged in axial fan hub 2, so just by weft tension screw regulator 16, automatic controller 19 and preposition stretch-draw load axle 10, has formed cable-tension regulating system.Then, broadwise cable systems is installed, the middle part of the first connection set 11 on each blade is connected successively, form broadwise first layer drag-line 6, peace is according to same mode, complete broadwise second layer drag-line, adopt warp-wise power transmission drag-line 8 that the mid point of first layer and second layer broadwise drag-line between every two blades is connected, and be connected with warp-wise drag-line land 15 after turning to by the static pulley on drag-line turning rack 9.
After the installation that completes drag-line, carry out the preset of cable-tension and debugging, can pass through the rotation of weft tension screw regulator 16 on preposition stretch-draw load axle 10, and be subject to the control of automatic controller 19, by the bearing of installing in the middle, drive warp-wise drag-line land 15 to move along weft tension screw regulator moving direction 18 again, when moving laterally, complete the tension of broadwise cable systems, the more mobile laterally, tension degree is larger; At this moment, broadwise cable systems by forming a compressive tension equilibrating force system for blade, makes the blade system of blower fan have good integrity and stability in the surface of revolution of blade.
In the running of blower fan, there will be the situation of tension recovery, at this moment, and after can responding to by tension pick-up, the tension force that is rotated to regulate broadwise cable systems to weft tension screw regulator 16 on preposition stretch-draw load axle 10; Make the tension force of blade in surface of revolution reach a rational setting value, all adjustment processes can be controlled, also automatically be completed by the automatic controller 19 being arranged in axial fan hub.
Claims (2)
1. for strengthening the broadwise cable arrangement of blades of large-scale wind driven generator stability, described large-scale wind driven generator contains three above blade (1), axial fan hub (2) and blower fan main shafts (3), described blade (1) is connected with axial fan hub (2), it is upper that axial fan hub (2) is arranged on blower fan main shaft (3), it is characterized in that: described cable arrangement comprises broadwise cable systems, cable-tension regulating system and is arranged on the first connection set (11) on each blade; Described broadwise cable systems comprises broadwise first layer drag-line (6) and warp-wise drag-line land (15); Described cable-tension regulating system contains weft tension screw regulator (16), automatic controller (19) and is fixed on the preposition stretch-draw load axle (10) on blower fan main shaft (3), and automatic controller (19) is connected with weft tension screw regulator (16) by guide line;
Broadwise first layer drag-line (6) connects the middle part of the first connection set (11) on each blade successively; One end of warp-wise power transmission drag-line (8) is connected the mid point of broadwise first layer drag-line between every two blades, the other end is connected with warp-wise drag-line land (15) after turning to by the static pulley on drag-line turning rack (9), the inside of weft tension screw regulator (16) is connected with preposition stretch-draw load axle (10) by screw thread, and the outside bearing that adopts is connected with warp-wise drag-line land (15).
According to claimed in claim 1 for strengthening the broadwise cable arrangement of blades of large-scale wind driven generator stability, it is characterized in that: described broadwise cable arrangement also comprises the second connection set (12) and broadwise second layer drag-line (7), broadwise second layer drag-line (7) connects the middle part of the second connection set (12) on each blade successively; Warp-wise power transmission drag-line (8) is connected the mid point of first layer and second layer broadwise drag-line between every two blades, and is connected with warp-wise drag-line land (15) after turning to by the static pulley on drag-line turning rack (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210017510.0A CN102536683B (en) | 2012-01-19 | 2012-01-19 | Zonal guy cable device used for enhancing blade stability of large-scale wind driven generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210017510.0A CN102536683B (en) | 2012-01-19 | 2012-01-19 | Zonal guy cable device used for enhancing blade stability of large-scale wind driven generator |
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| CN102536683A CN102536683A (en) | 2012-07-04 |
| CN102536683B true CN102536683B (en) | 2014-04-02 |
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| WO2022194333A1 (en) * | 2021-03-18 | 2022-09-22 | Vestas Wind Systems A/S | A pitch controlled wind turbine with blade connecting members and split blades |
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