CN102852722B - Hub displacement device and lifting method for impellers in direct-driven wind generating set - Google Patents

Hub displacement device and lifting method for impellers in direct-driven wind generating set Download PDF

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Publication number
CN102852722B
CN102852722B CN201210365708.8A CN201210365708A CN102852722B CN 102852722 B CN102852722 B CN 102852722B CN 201210365708 A CN201210365708 A CN 201210365708A CN 102852722 B CN102852722 B CN 102852722B
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wheel hub
blade
driver
flange
moving axis
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CN102852722A (en
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陈若旺
李会勋
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a hub displacement device and a lifting method for impellers in a direct-driven wind generating set and relates to the technical field of wind power generation. The problems that the in the prior art, when the impellers are lifted, the environment is damaged and the cost is high are solved. The hub displacement device comprises a driving unit, wherein the driving unit is fixed on a fixed shaft of an electric generator, the driving unit is used for outputting power or driving an assembly of a first blade and the hub to rotate 120 degrees towards a specified direction around an axle center of a moving shaft of the electrical generator or driving an assembly of the first blade and a second blade and the hub to rotate 120 degrees towards a specified direction around the axle center of the moving shaft, the hub and the moving shaft are connected fixedly, and the electrical generator is fixed on an engine room base at the top end of a tower of a fan.

Description

Wheel hub displacement device and lifting method for direct wind-driven generator group impeller
Technical field
The present invention relates to technical field of wind power generation, relate in particular to wheel hub displacement device and lifting method for direct wind-driven generator group impeller.
Background technique
Wind-power electricity generation is as a green industry, and energy-saving and environmental protection are that its chief value one of embodies.In wind power plant development & construction process, energy-saving and environmental protection are also one of common targets of pursuing of wind-power electricity generation industry relevant enterprise.The installation of direct wind-driven generator group is an important step in wind power plant development & construction, comprises generator lifting and impeller lifting.
Wherein, impeller lifting method is divided into terrestrial operation and two parts of aerial operation.Terrestrial operation comprises: first, wheel hub is put fixing on ground; Secondly, use three cranes respectively three blades are all lifted by crane with-90 degree and assembled with wheel hub, form impeller; Again, wherein two blades become 90 degree by-90 degree change oars.The outline portion that blade-90 degree state is blade upward, crossbeam part state down, blade 90 degree states be blade turn over after turnback crossbeam upward, profile state down.
Aerial operation comprises: first, impeller is lifted in the air; Secondly, impeller is winched to the specified position of pylon, and wheel hub is fixedly connected with the moving axis of generator; Finally, the 3rd blade that does not become oar in terrestrial operation in impeller completed to change oar aloft.
In implementing the process of impeller lifting, terrestrial operation need to take the place of certain area, so the demand in place while needing land acquisition to meet impeller assembling, cost is higher.And the area of impeller is larger, when impeller assembling and placement, to levelling of the land degree, require also higher, the place vegetation that need to cover impeller is cut down with smooth location, not only causes the destruction to environment, and the cost of land acquisition is further raise.In terrestrial operation, need to use three cranes in addition, because the more cost that makes of crane use amount further raises simultaneously.Therefore, run counter to the target that reaches the energy-saving and environmental protection that require in wind power plant development & construction process.
Summary of the invention
Embodiments of the invention provide a kind of wheel hub displacement device and lifting method for direct wind-driven generator group impeller, the high problem of welding, cost having existed while having solved impeller lifting in prior art.
For achieving the above object, embodiments of the invention adopt following technological scheme:
A wheel hub displacement device for direct wind-driven generator group impeller, comprises driver element, is fixed on the dead axle of generator; Described driver element is for outputting power, to drive the assemblying body of the first blade and wheel hub to spend towards assigned direction rotation 120 around the axle center of the moving axis of described generator, or drive the assemblying body of described the first blade, the second blade and described wheel hub to spend towards described assigned direction rotation 120 around the axle center of described moving axis; Described wheel hub is fixedly connected with described moving axis, and described generator is fixed on the engine room foundation on blower fan pylon top.
Preferably, described driver element is also for driving the surface of the first pitch variable bearings flange of described wheel hub on the axle center of described moving axis rotates to it in vertical state.
Preferably, described device, also comprises gear unit, is fixed on described moving axis, and the power of described driver element output is passed to described wheel hub by described gear unit.
Wherein, described driver element comprises motor, retarder and gear, and the input shaft of described retarder is fixedly connected with the pto=power take-off of described motor, and described gear is fixed on the output shaft of described retarder; Described gear unit is gear ring, described gear ring and the engagement of described gear.
Preferably, the means of fixation of described driver element and described dead axle is that bolt is fixed.
The lifting method for direct wind-driven generator group impeller that uses the above-mentioned wheel hub displacement device for direct wind-driven generator group impeller to carry out, comprising: (1) lifts wheel hub to specified position, and is fixedly connected with the moving axis of generator; Described generator is fixed on the engine room foundation on blower fan pylon top; (2) the first blade level lifting is also aloft assembled with described wheel hub; (3) described driver element is spent around the axle center of described moving axis the assemblying body of described the first blade and described wheel hub towards assigned direction rotation 120; (4) the second blade level lifting is also aloft assembled with described wheel hub; (5) described driver element is spent around the axle center of described moving axis the assemblying body of described the first blade, described the second blade and described wheel hub towards described assigned direction rotation 120; (6) the 3rd blade level lifting is also aloft assembled with described wheel hub.
Preferably, described step (2) specifically comprises: by described the first blade level lifting; Wheel hub described in described drive unit drives, makes the surface of the first pitch variable bearings flange of described wheel hub on the axle center of described moving axis rotates to it in vertical state; Described the first root of blade flange is fixedly connected with described the first pitch variable bearings flange; Described step (4) specifically comprises: described the second root of blade flange is fixedly connected with the second pitch variable bearings flange of described wheel hub; Described step (6) specifically comprises: described the 3rd root of blade flange is fixedly connected with the 3rd pitch variable bearings flange of described wheel hub.
Preferably, described method, also comprises: regulate the first pitch variable bearings flange of described wheel hub, described the first blade is become to oar operation.
Wherein, described method, also comprises: regulate the second pitch variable bearings flange of described wheel hub, described the second blade is become to oar operation.
Preferably, described method, also comprises: regulate the 3rd pitch variable bearings flange of described wheel hub, described the 3rd blade is become to oar operation.
In wheel hub displacement device and lifting method for direct wind-driven generator group impeller that the embodiment of the present invention provides, because the driver element in wheel hub displacement device can drive hub and the first blade and/or the second blade rotary, make blade can complete one by one the assembling with wheel hub aloft, therefore in the process of implementing impeller assembling, shared ground site area has reduced greatly, thereby greatly reduces the great number cost producing due to land acquisition.Meanwhile, also greatly reduce the destructiveness to its vegetation that covers in the process of impeller assembling, and then reduced the destruction to environment.In addition, in the whole hoisting process of impeller, wheel hub and each blade lift by crane respectively, can complete respectively wheel hub and vaned lifting by a crane, saved crane usage quantity, the cost of Construction of Wind Power is further reduced, therefore, reached the target of the energy-saving and environmental protection in wind power plant development & construction process.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of the lifting method for direct wind-driven generator group impeller that Fig. 1 provides for the embodiment of the present invention;
The skeleton diagram of related inter-module annexation in the lifting method for direct wind-driven generator group impeller that Fig. 2 provides for the embodiment of the present invention;
The schematic diagram of the wheel hub displacement device for direct wind-driven generator group impeller that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of wheel hub displacement device for direct wind-driven generator group impeller, as shown in Figure 3, comprises driver element 31, is fixed on the dead axle 212 of generator 21.Driver element 31 is for outputting power, to drive the first blade 241 and the assemblying body of wheel hub 244, around the axle center of the moving axis 211 of generator 21, towards assigned direction rotation 120, spend, or drive the axle center of the assemblying body moving axle 211 of the first blade 241, the second blade 242 and wheel hub 244 to spend towards assigned direction rotation 120, wheel hub 244 is fixedly connected with moving axis 211, and generator 21 is fixed on the engine room foundation 221 on blower fan pylon top.
In the wheel hub displacement device for direct wind-driven generator group impeller that the embodiment of the present invention provides, referring to Fig. 2 and Fig. 3 owing to comprising the driver element 31 being fixed on generator 21 dead axles 212, and generator 21 is fixed on the engine room foundation 221 on blower fan pylon 22 tops, therefore, driver element 31 is fixed.Wheel hub 244 is fixedly connected with moving axis 211, because driver element 31, for outputting power, to drive the first blade 241 and the assemblying body of wheel hub 244 to spend towards assigned direction rotation 120 around the axle center of the moving axis 211 of generator 21, thereby is installed the second blade 242; The axle center of the assemblying body moving axle 211 of driver element 31 or driving the first blade 241, the second blade 242 and wheel hub 244 is towards assigned direction rotation 120 degree, thus installation the 3rd blade 243.
Due to the driver element wheel hub in wheel hub displacement device and the first blade and/or the second blade rotary, can make blade can complete one by one the assembling with wheel hub aloft, therefore in the process of implementing impeller assembling, shared ground site area has reduced greatly, thereby greatly reduces the great number cost producing due to land acquisition.Meanwhile, also greatly reduce the destructiveness to its vegetation that covers in the process of impeller assembling, and then reduced the destruction to environment.In addition, in the whole hoisting process of impeller, wheel hub and each blade lift by crane respectively, can complete respectively wheel hub and vaned lifting by a crane, saved crane usage quantity, the cost of Construction of Wind Power is further reduced, therefore, reached the target of the energy-saving and environmental protection in wind power plant development & construction process.
Certainly, the driver element in above-mentioned wheel hub displacement device also can drive vane or the assemblying body of blade and wheel hub around the axle center of the moving axis of generator, towards assigned direction, rotate specified angle, such as 90 degree, 180 degree etc.
In addition, after the wheel hub assembling of above-mentioned driver element impeller in completing a direct wind-driven generator group, can disassemble from the dead axle of generator, for the wheel hub assembling of other direct wind-driven generator group impellers, or use when in carrying out direct wind-driven generator group, the blade of impeller keeps in repair or changes.
In the device that above-described embodiment provides, driver element 31 can also be for the axle center rotation of drive hub 244 moving axles 211 to the surface of the first pitch variable bearings flange 231 on it in vertical state.
Due to driver element 31 also for the axle center rotation of drive hub 244 moving axles 211 to the surface of the first pitch variable bearings flange 231 on it in vertical state, make 2411 of the first root of blade flanges parallel with the surface of the first pitch variable bearings flange 231, thereby facilitate itself and the first pitch variable bearings flange 231 abutting joints, also can avoid connecting bolt to be subject to extra-stress.
In the device that above-described embodiment provides, the power of driver element 31 can be directly passed to moving axis 211, then passes to the wheel hub 244 being fixed on moving axis 211, can be also alternate manner.For example described wheel hub displacement device can also comprise gear unit 32, is fixed on moving axis 211, and the power of driver element 31 outputs is passed to wheel hub 244 by gear unit 32.
Because gear unit 32 is fixed on moving axis 211, and the power of driver element 31 outputs can be passed to wheel hub 244 by gear unit 32, so gear unit 32 can make wheel hub 244 obtain more suitably power by certain velocity ratio.
Particularly, in said apparatus, driver element 31 can comprise motor 311, retarder 312 and gear 313, the input shaft of retarder 312 is fixedly connected with the pto=power take-off of motor 311, gear 313 is fixed on the output shaft of retarder 312, gear unit 32 can be gear ring 321, gear ring 321 and gear 313 engagements.
Certainly, the concrete structure of driver element 31 and gear unit 32 can be not limited to the structure shown in Fig. 3, can be other any can outputting power and by transmission of power the structure to wheel hub 244.
Due to, driver element 31 can comprise motor 311, retarder 312 and gear 313, and the input shaft of retarder 312 is fixedly connected with the pto=power take-off of motor 311, the power of motor 311 output is through retarder 312 and adjusted, and gear 313 is fixed on the output shaft of retarder 312, make transmission of power after retarder 312 regulates to gear 313, again because, gear unit 32 is gear ring 321, and gear ring 321 and gear 313 engagements, thereby make the power of motor 311 outputs meet the suitable power of gear ring 321 acquisition.In addition, because gear ring 321 is fixed on moving axis 211, can, to moving axis 211 more protections, improve the strength and stiffness of moving axis 211.
Particularly, in said apparatus, driver element 31 can be fixed for bolt with the means of fixation of dead axle 212, bolt connects is convenient to mount and dismount driver element 31, this driver element 31 can be used in a plurality of direct wind-driven generator groups of same model, position to wheel hub 244 is adjusted, so that blade to be installed, thus cost-saving.
The embodiment of the present invention also provides a kind of lifting method for direct wind-driven generator group impeller, the wheel hub displacement device for direct wind-driven generator group impeller that the method has been used above-described embodiment to describe, as shown in Figure 1, Figure 2 and Figure 3, comprise the steps.
101, wheel hub 244 is lifted to specified position, and be fixedly connected with the moving axis 211 of generator 21, generator 21 is fixed on the engine room foundation 221 on blower fan pylon 22 tops.
102, the first blade 241 level liftings are also aloft assembled with wheel hub 244.
103, driver element 31 is spent the first blade 241 and the axle center of the assemblying body moving axle 211 of wheel hub 244 towards assigned direction rotation 120.
104, the second blade 242 level liftings are also aloft assembled with wheel hub 244.
105, driver element 31 is spent the axle center of the assemblying body moving axle 211 of the first blade 241, the second blade 242 and wheel hub 244 towards assigned direction rotation 120.
106, the 3rd blade 243 level liftings are also aloft assembled with wheel hub 244.
In the lifting method for direct wind-driven generator group impeller that the embodiment of the present invention provides, referring to Fig. 2, generator 21 is fixed on the engine room foundation 221 on blower fan pylon 22 tops, because wheel hub 244 is fixedly connected with the moving axis 211 of generator 21, when the moving axis 211 of generator 21 rotates, wheel hub 244 can rotate with the moving axis 211 of generator 21.And three blade difference level liftings are also aloft assembled with wheel hub 244, can form impeller 24.Concrete hoisting process can be: complete with wheel hub 244 assemblings when the first blade 241, driver element 31 is spent the axle center of the assemblying body moving axle 211 of the two formation towards assigned direction rotation 120, so that the second blade 242 to be installed.As a same reason, complete with wheel hub 244 assemblings when the second blade 242, the axle center of the assemblying body moving axle 211 that driver element 31 forms the first blade 241, the second blade 242 and wheel hub 244 is towards assigned direction rotation 120 degree, so that the 3rd blade 243 to be installed.
Because impeller has completed assembling aloft, so shared ground site area has reduced greatly in implementing impeller hoisting process, thereby greatly reduce the great number cost producing due to land acquisition, simultaneously, also greatly reduce the destructiveness to its vegetation that covers in the process of impeller assembling, and then reduced the destruction to environment.In addition, in whole hoisting process, can complete respectively wheel hub and vaned lifting by a crane, saved crane usage quantity, the cost of Construction of Wind Power is further reduced, therefore, reached the target of the energy-saving and environmental protection in wind power plant development & construction process.
In addition, in prior art due to by impeller 24 after ground assembling integral hoisting to aerial, when wheel hub 244 docks with the moving axis 211 of generator 21, owing to may having angle between wheel hub 244 and moving axis 211 flanged surfaces, and impeller 24 weight cause more greatly described angle to be not easy to regulate, be prone to the flimsy problem of connecting bolt that connects two faces.And in embodiment provided by the invention, first wheel hub 244 liftings are connected with the moving axis 211 of generator 21, wheel hub 244 weight are lighter, even if exist described angle also to regulate than being easier between wheel hub 244 and moving axis 211 flanged surfaces.Connecting bolt stressed also smaller, can not cause the damage of connecting bolt.
During for fear of blade and wheel hub assembling there is angle in pitch variable bearings flanged surface and root of blade flanged surface, make connecting bolt be subject to the problem of extra-stress, in lifting method for direct wind-driven generator group impeller provided by the invention, step 102 specifically can comprise: by the first blade 241 level liftings, the axle center rotation that makes wheel hub 244 moving axles 211, is fixedly connected with the first root of blade flange 2411 in vertical state to the surface of the first pitch variable bearings flange 231 on it with the first pitch variable bearings flange 231; Step 104 specifically can comprise: the second root of blade flange 2421 is fixedly connected with the second pitch variable bearings flange 232 of wheel hub 244; Step 106 specifically can comprise: the 3rd root of blade flange 2431 is fixedly connected with the 3rd pitch variable bearings flange 233 of wheel hub 244.
Because step 102 specifically can comprise: by the first blade 241 level liftings, the axle center rotation that driver element 31 drive hubs 244 make wheel hub 244 moving axles 211 to the surface of the first pitch variable bearings flange 231 on it in vertical state, so that the first blade 241 levels rise winch to aerial after, the first 2411 of root of blade flanges are parallel with the surface of the first pitch variable bearings flange 231, thereby facilitate itself and the first pitch variable bearings flange 231 abutting joints, also can avoid connecting bolt to be subject to extra-stress.The first root of blade flange 2411 is fixedly connected with the first pitch variable bearings flange 231, the first blade 241 is firmly connected on wheel hub 244, form assemblying body.Step 104 specifically can comprise: the second root of blade flange 2421 is fixedly connected with the second pitch variable bearings flange 232 of wheel hub 244; The second blade 242 is firmly connected on wheel hub 244, forms assemblying body.Step 106 specifically can comprise: the 3rd root of blade flange 2431 is fixedly connected with the 3rd pitch variable bearings flange 233 of wheel hub 244, the 3rd blade 243 is firmly connected on wheel hub 244, form impeller 24.
In said method, can also comprise: regulate the first pitch variable bearings flange 231 of wheel hub 244, the first blade 241 is become to oar operation.
Owing to regulating the first pitch variable bearings flange 231 of wheel hub 244, can make the first blade 241 around the central rotation of 231 of its flange at bottom 2411/first pitch variable bearings flanges, thereby can realize, the first blade 241 is become to oar operation.
In said method, can also comprise: regulate the second pitch variable bearings flange 232 of wheel hub 244, the second blade is become to oar operation.
Owing to regulating the second pitch variable bearings flange 232 of wheel hub 244, can make the second blade 242 around the central rotation of 232 of its flange at bottom 2421/second pitch variable bearings flanges, thereby can realize, the second blade 242 is become to oar operation.
In said method, can also comprise: regulate the 3rd pitch variable bearings flange 233 of wheel hub 244, the 3rd blade 243 is become to oar operation.
Owing to regulating the 3rd pitch variable bearings flange 233 of wheel hub 244, can make the 3rd blade 243 around the central rotation of 233 of 2431 of its flange at bottoms/3rd pitch variable bearings flanges, thereby can realize, the 3rd blade 243 is become to oar operation.
In addition, in prior art, on land or sea, when single blade of direct wind-driven generator group needs repairing or changes, whole impeller integral body need to be disassembled from pylon, after ground is by problem blade exchanging, then by impeller integral hoisting to pylon, cause the problem that cost is high, operation easier is large, efficiency is low, be inconvenient to operate.And the device and the method that adopt above-described embodiment to provide, can realize aloft by single blade dismounting and installation, without whole impeller demolition is got off, thoroughly solved the problem that the cost existing in prior art is high, operation easier is large, efficiency is low, be inconvenient to operate.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.

Claims (9)

1. for a wheel hub displacement device for direct wind-driven generator group impeller, it is characterized in that, comprising:
Driver element, is fixed on the dead axle of generator; Described driver element is for outputting power, to drive the assemblying body of the first blade and wheel hub to spend towards assigned direction rotation 120 around the axle center of the moving axis of described generator, or drive the assemblying body of described the first blade, the second blade and described wheel hub to spend towards described assigned direction rotation 120 around the axle center of described moving axis;
Gear unit, is fixed on described moving axis, and described gear unit is gear ring, the gear engagement in described gear ring and described driver element;
Described wheel hub is fixedly connected with described moving axis, and described generator is fixed on the engine room foundation on blower fan pylon top.
2. device according to claim 1, is characterized in that, described driver element is also for driving the surface of the first pitch variable bearings flange of described wheel hub on the axle center of described moving axis rotates to it in vertical state.
3. device according to claim 1 and 2, it is characterized in that, described driver element comprises motor, retarder and gear, and the input shaft of described retarder is fixedly connected with the pto=power take-off of described motor, and described gear is fixed on the output shaft of described retarder.
4. device according to claim 1, is characterized in that, the means of fixation of described driver element and described dead axle is that bolt is fixed.
5. the lifting method for direct wind-driven generator group impeller that the device described in right to use requirement 1 to 4 any one carries out, is characterized in that, comprising:
(1) wheel hub is lifted to specified position, and be fixedly connected with the moving axis of generator; Described generator is fixed on the engine room foundation on blower fan pylon top;
(2) the first blade level lifting is also aloft assembled with described wheel hub;
(3) described driver element is spent around the axle center of described moving axis the assemblying body of described the first blade and described wheel hub towards assigned direction rotation 120;
(4) the second blade level lifting is also aloft assembled with described wheel hub;
(5) described driver element is spent around the axle center of described moving axis the assemblying body of described the first blade, described the second blade and described wheel hub towards described assigned direction rotation 120;
(6) the 3rd blade level lifting is also aloft assembled with described wheel hub.
6. method according to claim 5, is characterized in that, described step (2) specifically comprises: by described the first blade level lifting; Wheel hub described in described drive unit drives, makes the surface of the first pitch variable bearings flange of described wheel hub on the axle center of described moving axis rotates to it in vertical state; Described the first root of blade flange is fixedly connected with described the first pitch variable bearings flange;
Described step (4) specifically comprises: described the second root of blade flange is fixedly connected with the second pitch variable bearings flange of described wheel hub;
Described step (6) specifically comprises: described the 3rd root of blade flange is fixedly connected with the 3rd pitch variable bearings flange of described wheel hub.
7. method according to claim 6, is characterized in that, also comprises: regulate the first pitch variable bearings flange of described wheel hub, described the first blade is become to oar operation.
8. method according to claim 6, is characterized in that, also comprises: regulate the second pitch variable bearings flange of described wheel hub, described the second blade is become to oar operation.
9. method according to claim 6, is characterized in that, also comprises: regulate the 3rd pitch variable bearings flange of described wheel hub, described the 3rd blade is become to oar operation.
CN201210365708.8A 2012-09-27 2012-09-27 Hub displacement device and lifting method for impellers in direct-driven wind generating set Active CN102852722B (en)

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CN102650261A (en) * 2012-05-18 2012-08-29 中国十七冶集团有限公司 Segmental lifting method for impeller of high-power wind driven generator

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