CN104110349A - Horizontal-axis wind turbine with blades capable of being connected into lattice - Google Patents

Abstract

The invention discloses a horizontal-axis wind turbine with blades capable of being connected into a lattice. A main blade body and a rotary blade body are arranged on each blade of the horizontal-axis wind turbine, each rotary blade body can rotate relative to the far end of the corresponding main blade body and is in lap joint with the main blade body of the adjacent blade and fixed after rotation, or in lap joint with a hub of the horizontal-axis wind turbine and fixed after rotation, and then the lattice connection structure is formed. Due to the fact that the rotary blade bodies support one another after being in lap joint, moment of force and quivering suffered by the blades are reduced greatly, and structural strength is improved greatly.

Description

Blade can be the horizontal axis wind-driven generator that lattice connects

Technical field

The present invention relates to a kind of horizontal axis wind-driven generator, particularly a kind of blade structure of horizontal axis wind-driven generator.

Background technique

Along with the development of technology, wind-driven generator is maximization (1MW and more than) development trend.The blade of maximization horizontal axis wind-driven generator, need to resist huge moment.For the structural strength of blade is met design requirement, general way is to strengthen the sectional dimension of blade, can resist huge moment.

There are equally the problems referred to above in scalable or folding blade, for example, (patent documentation 1:CN102187093A in the blade of existing horizontal axis wind-driven generator, patent documentation 2:US2006/0045743A1, patent documentation 3:US4468169A, patent documentation 4:US2009/0208337A1, patent documentation 5:201180002668.4, patent documentation 6:201010192072.2, patent documentation 7:201210225362.1), patent documentation 2, 5, 6, blade in 7, no matter when, all be single cantilever beam stress, and its stressed length during strong wind, no matter be telescopic blade or folding blade, all be not less than 50% of blade total length, when surpassing cut-out wind speed, be still single cantilever beam stress, therefore blade still needs to resist huge moment.Due to the poor rigidity of single cantilever beam structure, resist the ability of flutter, thereby the probability of generation flutter is high, earthquake intensity is large.In patent documentation 1,4, utilize tension rope that adjacent blade is bundled, to reducing blade, the particularly moment at blade root place, yet how it guarantees not cause fearful resonance, is a great problem; When if this technology is applied in large-scale wind driven generator most popular 2 leaves, 3 impeller boss, because the angle between blade and tension rope is little, the effect that prevents blade vibration is showing and is reducing, and also affects the aerodynamic performance of blade; If this technology is applied to 5 leaves or is greater than the impeller of 5 leaves, to compare with the impeller of 2,3,4 blades, 5 blades or more than the impeller of 5 blades, have the less shortcoming of scope of the tip-speed ratio of maximal wind-energy utilization factor, also do not meet the original intention that improves generating effect; In addition, before it tension rope from blade very close to, the leading edge in impeller, impeller carry out flow path direction, can upset flow field, affect the efficiency of impeller capturing wind energy.

Summary of the invention

For the deficiencies in the prior art, the object of the invention is to: provide a kind of blade can be the horizontal axis wind-driven generator that lattice connects, reducing leaf production with in material, improve the efficiency of impeller capturing wind energy.

For achieving the above object, the technical solution used in the present invention is:

A kind of blade can be the horizontal axis wind-driven generator that lattice connects, it is characterized in that: on each blade of described horizontal axis wind-driven generator, there is a female blade and a turning blade, described in each, turning blade can be turned back at the far-end of female blade, and each turning blade after turning back is overlapped on female blade of adjacent blades, and fix it, or each turning blade after turning back is overlapped on the wheel hub of described horizontal axis wind-driven generator and is fixed, to form lattice linkage structure.

Wherein: female blade and turning blade connecting part are provided with running shaft, the axle sleeve that has three groups of separate rotations at described running shaft upper sleeve through, described three groups of separate axle sleeves respectively with female blade, turning blade and a force transmitting board Joint, between one side of described force transmitting board and described turning blade, with jack on a group, be connected, between the opposite side of described force transmitting board and described female blade, with jack under a group, be connected.

Wherein: when turning angle is less than 180 while spending, female blade and turning blade join with running shaft, and be consolidated between jack base on female blade and turning blade and directly with jack, be connected, to control the relative angle between female blade and turning blade.

Wherein: the lap-joint of described turning blade and adjacent blades or wheel hub utilizes overlap joint locking device to fix, described overlap joint locking device is the locking jaw driving with jack, on described adjacent blades or wheel hub, for the position contacting with turning blade, be provided with the pulvinus identical with turning blade gabarit, on pulvinus, be covered with soft and wear-resisting material.

Wherein: between described female blade and described turning blade, also can be connected with at least one Leaf, described at least one Leaf and described female blade (or blades) form retractable blades or collapsible blade.

Wherein: the far-end of described turning blade is also extensible at least one blades, described at least one blades forms retractable blades or collapsible blade.

For achieving the above object, the technical solution used in the present invention is:

A kind of blade can be the horizontal axis wind-driven generator that lattice connects, the number of blade of described wind-driven generator equals one or two, it is characterized in that: the hub access that is provided with perforation in wheel hub, two integrated movable blades are parallel to each other and are oppositely plugged in hub access, every a slice integrated movable blade moves with locking device and drives by blade, can move and locate (locking simultaneously) relative to hub access, the blade tip of described integrated movable blade can be retracted, and blade root is stretched out from hub access, between the blade root of every a slice integrated movable blade and another integrated movable blade, with overlap joint locking device, be fixed together, form lattice linkage structure.

Wherein: described blade moves and comprises with locking device the driving wheel contacting with described blades and make described driving wheel and blades keeps the jack be close to.

Wherein: described overlap joint locking device is the locking jaw driving with jack.

For achieving the above object, the technical solution used in the present invention is:

A kind of blade can be the horizontal axis wind-driven generator that lattice connects, comprise female blade and blades that at least one pair of can stretch relatively, blades is sleeved in female blade, and is moved with locking device and realized fore and aft motion and spacing by the blade between female blade and blades; It is characterized in that: blades Stepwize Shrink enters in female blade, while stopping also operation, at least the far-end at female blade has two places separated by a distance to move with locking device and lock with blade, or the part outside this two place arranges more blade and moves and locking device, make to form lattice linkage structure between blades and female blade.

Compared with prior art, the beneficial effect that the present invention has is: turning blade, collapsible blade and female blade are cancelled structure after mutually overlapping, moment that blade is subject to is being shown and reduce, and structure optimization, thus reduce leaf production materials.Leaf weight alleviates, and has multiple electricity, alleviates the plurality of advantages such as other structural load of wind-driven generator.

Accompanying drawing explanation

Fig. 1 a is blades and female blade partial structurtes schematic diagram of the telescopic wind-driven generator of blade;

Fig. 1 b is that blades and female blade of the telescopic wind-driven generator of blade is cancelled structure principle schematic;

Fig. 2 a, Fig. 2 b, Fig. 2 c are the various states of the blade of the telescopic wind-driven generator of blade (while only having blades and female blade);

Fig. 3 a, Fig. 3 b, Fig. 3 c are the various states of the blade of the telescopic wind-driven generator of blade (while having Leaf);

Fig. 4 is locking device and locking jaw schematic diagram;

Fig. 5 is pulvinus schematic diagram;

Fig. 6 is the 3 leaf impeller schematic diagram that blade (without Leaf time) is the horizontal axis wind-driven generator that lattice connects;

Fig. 7 a, 7b, 7c are the 3 leaf impeller schematic diagram that blade (while having Leaf) is the horizontal axis wind-driven generator of lattice connection;

Fig. 8 a, 8b, 8c are the 3 leaf impeller schematic diagram that blade (having retractable blades) is the horizontal axis wind-driven generator of lattice connection;

Fig. 8 d is the 3 leaf impeller schematic diagram that blade (having retractable blades) is the horizontal axis wind-driven generator of lattice connection;

Fig. 9 a, 9b, 9c are the impeller schematic diagram that single blade impeller (containing retractable blades) is the horizontal axis wind-driven generator of lattice connection;

Figure 10 a, 10b, 10c are the impeller schematic diagram that two blade impeller (containing retractable blades) is the horizontal axis wind-driven generator of lattice connection;

Figure 11 is that blade integral can move, and is the horizontal axis wind-driven generator two blade impeller schematic diagram that lattice connects;

Figure 12 is the schematic diagram of blade replicated structures.

Description of reference numerals: blades 100; Turning blade 100 ', 200 '; Collapsible blade 100 ' '; Running shaft 150; Axle sleeve 151,152,153; Leaf 200; Female blade 300; Integrated movable blade 301; Wheel hub 400; Hub access 501; Blade moves and locking device 600; Support 700; Fulcrum 701; Overlap joint locking device 800; Locking jaw 801; Pulvinus 900; Force transmitting board 1000; Bearing 1101; Upper jack 1102; Lower jack 1103.

Embodiment

For object of the present invention, technological scheme and beneficial effect thereof are more easily understood, enumerate following examples.Claim of the present invention is not limited to the methods in following embodiment.

First, the invention provides a kind of horizontal axis wind-driven generator, there is retractable blades, at least comprise a pair of female blade 300 that can relatively stretch (the fixing part of general title and wheel hub is female blade 300) and blades 100, in fact, described retractable blades can comprise 2 joints, 3 joint or more piece blades more, to form the Collapsible structure of more piece.See the embodiment shown in Fig. 1 a, Fig. 1 b, blades 100 is sleeved in female blade 300, and is moved with locking device 600 and realized fore and aft motion and spacing by the blade between female blade 300 and blades 100.Described blade moves and comprises with locking device 600 driving wheel contacting with described blades 100 and make described female blade 300, driving wheel and blades 100 keep the jack of being close to; In fact, described blade move move mode with locking device 600 can be also as China Patent No. be 201010192072.2 disclosed worm structures, just need mix the locking function that the present invention advocates.

When described horizontal axis wind-driven generator is used, as shown in Figure 2 a, blades 100 reaches long status, at the far-end (away from wheel hub one end) of female blade 300, locating to locate at least this two place with the near-end of blades 100 (near wheel hub one end) arranges described blade and moves and locking device 600 (being all arranged on female blade 300), and locking, (also can the part outside this two place arrange more blade move with (or) locking device, think under other state and use.) when wind speed is by calm rising gradually, reach incision wind speed, rise to rated wind speed, and gradually increase, blades 100 is moved with locking device 600 after exceeding rated wind speed by blade, as shown in Figure 2 b, Stepwize Shrink enters in female blade 300 on demand, until while reaching cut-out wind speed, as shown in Figure 2 c, blades 100 all collapses in female blade 300, at aforementioned arbitrary blade, stop with operation (comprise shutting down and keep away strong wind) constantly, blade move with (or) locking device all locks, make to form lattice linkage structure between blades 100 and female blade 300, rely on this cancelled structure that it can not shaken, with this, resist various wind speed particularly including cut-out wind speed until maximum wind speed.The present embodiment is not limited to the wind-driven generator with female blade 300 and 1 knot blade, as shown in Fig. 3 a, Fig. 3 b, Fig. 3 c, be there is blades 100, the principle schematic of 3 joint formula retractable blades under the flexible state of difference of Leaf 200 and female blade 300.

Next, as shown in Figure 6, it is the schematic diagram that a kind of blade provided by the invention can be the horizontal axis wind-driven generator of lattice connection, in the present embodiment, on each blade of described horizontal axis wind-driven generator, there is a female blade 300 and a turning blade 100 ' of can relative female blade 300 turning back.At wind speed, during lower than cut-out wind speed, described turning blade 100 ' is as shown in solid line in Fig. 6, in stretching out state (now certainly need be fixed between female blade 300 and turning blade 100 ', other examples are as the same) completely, to obtain wind energy; And when wind speed is during higher than cut-out wind speed, described turning blade 100 ' as shown in phantom in Figure 6, described in each, the far-end of the relatively female blade 300 of turning blade 100 ' is turned back, and the turning blade 100 ' after each is turned back is overlapped on female blade 300 of adjacent retractable blades and fixing, form lattice linkage structure.

In the embodiment shown in fig. 8, blades 100 first shrinks in Leaf 200, after the overlap joint of turning back, because it is 3 leaf impellers, three turning blades 100 ' and three female blades 300 are overlapped to form three triangular structures, can mutually support, moment that blade is subject to shown and reduce, structural strength strengthens.

As for turning blade 100 ', how to transfer, need to consult shown in Figure 12, female blade 100 is provided with running shaft 150 with turning blade 100 ' connecting part, the axle sleeve 151 that has three separate rotations at described running shaft 150 upper sleeve throughs, 152, 153, described three separate axle sleeves 151, 152, 153 respectively with female blade 300, turning blade 100 ' and force transmitting board 1000 Joints are (wherein, and the fixed axle sleeve 151 of 300, female blade also can be simultaneously fixed with axle, but the difficulty in the time of can increasing the turning blade 100 ' of handling and force transmitting board 1000), between one side of described force transmitting board 1000 and described turning blade 100 ', with jack 1102 on a group, be connected, between the opposite side of described force transmitting board 1000 and described female blade 300, with jack 1103 under a group, be connected.Like this, the synergy by upper jack 1102 with lower jack 1103, by force transmitting board 1000 transferring power placed in the middle, can make female blade 300 and the relative angle of turning blade 100 ' change.In the situation that the relative rotation angle scope between female blade 300 and turning blade 100 ' is less than 180 degree, also intermediate plate can be set, but be consolidated between jack base on female blade 300 and turning blade 100 ', directly with jack, join, also can control relative rotation angle.

In the embodiment shown in Fig. 7 a, Fig. 7 b, Fig. 7 c, the collapsible blade 100 ' that described blade has female blade 300, the turning blade 200 ' of can relatively female blade 300 turning back and can relatively turning blade 200 ' completes 180 degree turnovers '.As shown in Figure 7a, described blade is in stretching out state completely; As shown in Figure 7b, described collapsible blade 100 ' ' there are 180 degree and turn back in relatively turning blade 200 '; As shown in Figure 7 c, the far-end of the relatively female blade 300 of described turning blade 200 ' is turned back, and the turning blade 200 ' after each is turned back is overlapped on female blade 300 of adjacent retractable blades and fixing, forms lattice linkage structure.(note: described collapsible blade, belong to prior art, refer to that two the blade-section maximums that are connected can turn down 180 degree and then close up the structure being superimposed together.) at this lay special stress on, a large difference of the present invention and prior art is to turn back, stretch while stopping with operation, shutdown, near the not restrained free end (or it) of each Leaf in the present invention, blades is known and is fixed.

In the embodiment shown in Fig. 8 a, Fig. 8 b, Fig. 8 c, described blade is to have female blade 300, the turning blade 200 ' of can relatively female blade 300 turning back and blades 100 that can be flexible in turning Leaf 200 '.As shown in Figure 8 a, described blade is in stretching out state completely; As shown in Figure 8 b, in the turning blade 200 ' of described blades 100 retraction; As shown in Figure 8 c, the far-end of the relatively female blade 300 of described turning blade 200 ' is turned back, and the turning blade 200 ' after each is turned back is overlapped on female blade 300 of adjacent retractable blades fixingly, forms lattice linkage structure.

In the embodiment shown in Fig. 8 a, Fig. 8 d, itself and last embodiment's difference is, described blade has female blade 300, Leaf 200 that can be flexible in female blade 300 and the turning blade 100 ' that Leaf 200 is turned back relatively.As shown in Fig. 8 d, in the female blade 300 of the first retraction of described Leaf 200, then, the far-end of described turning blade 100 ' relative Leaf 200 is turned back, and the turning blade 100 ' after each is turned back is overlapped on upper the fixing of female blade 300 (or Leaf 200) of adjacent retractable blades, formation lattice linkage structure.

In above-described embodiment, by blade is overlapped on adjacent blades, form lattice linkage structure, can make blade is no longer single-cantilever beam type stress, and becomes overhanging beam stress, can change significantly blade root place stress concentration status, reduce leaf production materials, improve leaf longevity.Certainly, in the embodiment shown in Fig. 6, Fig. 7 c, Fig. 8 c, Fig. 8 d, although turning blade all be take overhanging beam stress as example, in fact in these embodiments, turning blade all can change simply supported beam into.

In above-described embodiment, turning blade 100 ', 200 ' and the lap-joint of another blade (with female blade 300 signals), as shown in Figure 4, to utilize overlap joint locking device 800 (as the locking jaw 801 by Driven by Hydraulic Cylinder) fixing, and, described another blade is provided with the pulvinus 900 (as shown in Figure 4, Figure 5) identical with turning blade gabarit for the position contacting with turning blade, on pulvinus 900, cover with soft and wear-resisting material (as rubber), with enlarge active surface, prevent damaged blade.

Shown in Fig. 9 a, Fig. 9 b, Fig. 9 c, when the present invention is applied to the number of blade and is less than or equal to 3 impeller, turning blade 100 ' can be turned back, and then snaps on wheel hub 400, also forms lattice linkage structure.Now, the position contacting with turning blade on wheel hub 400 or the structure that is attached thereto arranges fulcrum 701 or support 700, pulvinus 900 (flush with cowling or slightly exceed cowling) is then set on fulcrum 701 or support 700, and fixing with overlap joint locking device 800.In the embodiment shown in Fig. 9 a, Fig. 9 b, turning blade 100 ' is overhanging beam stress, and in the embodiment shown in Fig. 9 c, turning blade 100 ' is simply supported beam stress.

Consulting shown in Figure 10 a, Figure 10 b, Figure 10 c, is the present invention when being applied to the number of blade and equaling 2 impeller again, the lattice linkage structure forming, and its structure and Fig. 9 a, Fig. 9 b, Fig. 9 c are similar, do not repeat them here.

Method in above-mentioned Fig. 9 a, Fig. 9 b, Fig. 9 c, Figure 10 a, Figure 10 b, Figure 10 c illustrated embodiment, is not limited to the number of blade and is less than or equal to 3 wind-driven generator, and mutliblade wind-driven generator is equally available.If the Leaf of being turned back, blades and female blade intersect, the trailing edge (or leading edge) that can make the leading edge (or trailing edge) of blades (or Leaf) be placed in adjacent female blade is located.

Next refer to shown in Figure 11, that the present invention is applied to the structural representation that the number of blade equals 2 integrated movable blade, it is the hub access 501 that is provided with perforation in wheel hub 500, two integrated movable blades 301 are parallel to each other and are oppositely plugged in hub access 501, every a slice integrated movable blade 301 moves with locking device 600 and drives by described blade, can move and locate relative to hub access 501.At wind speed, during lower than rated wind speed, the blade tip of every a slice integrated movable blade 301 all reaches long status, to obtain maximum wind energy; And when wind speed is during higher than rated wind speed, the blade tip of integrated movable blade 301 is progressively retracted, and blade root is stretched out from hub access 501, then, between the blade root of every a slice integrated movable blade 301 and another integrated movable blade 301, with described overlap joint locking device 800, be fixed together, also can form lattice linkage structure.

Adopt lattice linkage structure provided by the invention, than prior art reduced blade stressed (being mainly that moment significantly reduces), increased the rigidity of bending resistant section coefficient, Torsion Section coefficient and the structure of blade, can effectively alleviate vibration, be conducive to alleviate the weight of blade, thereby reduced initial cost, be conducive to enter in advance incision wind speed, rated wind speed, postpone to exit cut-out wind speed, be conducive to send more electric power.

For avoiding blade to produce damage because of flutter, the defined cancelled structure of the present invention, each main member, as blade, support, all can be considered large-section rigid body, have locking device concurrently, can effectively carry tension and compression bending, and its material mostly is fiber reinforced plastic, there is superior absorbing performance, can effectively prevent flutter.And the tension rope of patent documentation 1,4 is particularly laterally strained rope, when needs transmission of pressure, bending force, torsion, it is just helpless, and its intensity, is also far inferior to the intensity of the member that the present invention advocates.Its usefulness that prevents flutter will be had a greatly reduced quality.In use, tension Suo Ruguo rate of tension in patent documentation 1,4 is unreasonable, will cause leaf position deviation theory position, reaches certain value if depart from, can cause static unbalance, the dynamic unbalance of impeller, have the trouble that needs often to adjust the rate of tension of straining rope.Particularly an impeller only, just has tension rope to be no less than 20 sections more than.The rate of tension of tension rope differs, length differs, just as sending 20 strings of various sound, under the blowing of various different wind speed, each root has the different natural frequencies of vibration, parts on wind-driven generator are numerous, how to guarantee that fearful resonance does not occur for it, does not see proposition solution.

The quality of impeller also needs to see that can it send more electric energy under same diameter.If increasing impeller diameter, the weight of impeller is to be directly proportional to 3 powers of length of blade, obviously can not strengthen easily the diameter of impeller.Patent documentation 1,4, so much tension rope, has impact to the aerodynamic performance of blade, particularly before tension rope, from blade very close to, the leading edge in impeller, impeller carry out flow path direction, upset flow field, affect impeller capturing wind energy.Moreover, compare with the impeller of 2,3,4 blades, 5 blades or more than the impeller of 5 blades, the less shortcoming of scope with the tip-speed ratio of maximal wind-energy utilization factor, so large-scale wind driven generator, multiplex three leaves, two leaf blade impellers, patent documentation 1,4, the multiblade impellers such as main applicable five blades, six blades, have just lost the chance that obtains high scope power coefficient.Some scheme of the present invention has ad hoc support, but all in wheel hub, near rotating center, has streamlined contour, and the aerodynamic performance to impeller, does not have obvious impact.

The technology of patent documentation 1,4, if for using two maximum blades, three blade impellers on large-scale wind driven generator market, no matter front tension rope, rear tension rope, horizontal tension rope, the angle of axis of object is all very little with being drawn, horizontal tension rope and the angle that is drawn the axis of object (two blades, three blade impeller blades), be respectively and approach 0 degree, 30 degree, and angle is little, for making blade keep stable, can only increase the diameter of tension rope.Front tension rope, rear tension rope and drawn the angle of the axis of object to approach especially 0 degree, tension rope diameter is thick again, also difficult its usefulness of performance.

These weakness of patent documentation 1,4, the present invention avoids one by one.And the present invention makes, safeguards all simple, reliable, has omnibearing advantage.

Described in patent documentation 2, be a kind of folding blade of wind-driven generator, after folding, blade is still overhang, mainly with blade, ad hoc support, does not form cancelled structure as the present invention; Described in patent documentation 3, be a kind of vertical axis aerogenerator, also mainly with blade, ad hoc support, do not form cancelled structure; It and horizontal axis wind-driven generator lack comparativity.

The present invention, when the number of blade equals 1 or 2, blade tip end can snap on ad hoc pillar on wheel hub (above having pulvinus), or snap on the pulvinus of the ad hoc fulcrum in wheel hub side, and fix it, make ad hoc pillar (or wheel hub itself) cancelled structure triangular in shape on the blades of this blade and female blade of this blade and wheel hub, make blades be overhanging beam or be simply supported beam stress, female blade is fixedly stress of freely-supported one end, one end, than existing single cantilever beam stress, greatly favourable, can greatly reduce structural section long-pending;

Wherein, the a certain state of blade as described in patent documentation 7 (such as folding position is arranged on when blade tip is slightly less than or equal 50% length of blade place), after folding, blades and female blade are drawn close, blade is still in single cantilever beam stress, half length that now length of overhang is blade, is the shortest state of this patent blade, is also the state that suffers moment minimum; By the present invention, even blade 50% near turn back, blade tip is fixed on ad hoc fulcrum (as Fig. 9 a), or near (as Fig. 9 b) on the ad hoc support of blades adjacent blade root, form triangle cancelled structure, only the distance between blade root and blade tip (leg-of-mutton one side) is very little.Even least reasonably as the scheme of Fig. 9 c, be also better than above-mentioned patent.When being regarded as single cantilever beam stress, the length of beam is nearly half length of blade, and bending resistant section coefficient, the Torsion Section coefficient in the arbitrary cross section of blade have but had huge raising.Because, the amount of the section material of beam (female blade and blades are added) has increased (making consumptive material does not increase), and, material area is arranged to (having large moment of inertia) to the place far away apart from the principal axis of inertia, can guarantee reinforcement bending resistance under identical moment condition, torsional property, and save material.The present invention just comparison than patent many a device that blade is tightened up, and there is no what technical difficulty, its superiority be but apparent.

When the number of blade is more than or equal to 3, blades snaps into the place that turns back of adjacent blades, and fixes with locking device, makes blades be overhanging beam shape or is simply supported beam shape; Blade on impeller has just been built into triangle cancelled structure one by one and has born wind load like this, to substitute original single-cantilever beam type stress.

Above-mentioned all methods, compare with patent documentation 2,5,6,7, or antitorque, the bending resistance in cross section, anti-air-flow coupled vibrations ability all improve greatly, or the moment of bearing reduces greatly, and amount of deflection reduces greatly, or haves both at the same time, and can significantly reduce the consumption of material.

A scheme when the number of blade equals 2, as Fig. 9 a, Fig. 9 b, Fig. 9 c, Figure 10 a, Figure 10 b, Figure 10 c, blade on impeller has just been built into two triangle cancelled structures and has born wind load, to substitute two original single-cantilever beam type stresses, the antitorque resistance to shock of its bending resistance is greatly improved.

When the number of blade equals 2, wheel hub is provided with hub access, is provided with overall movable type blade in hub access, by several blades, is moved and is moved to desired location with locking device and the device that is locked is fixed, and is built into cancelled structure.Because it is the size according to wind-force, adjust the length of blade, thereby can make blade save to greatest extent the material consumption of blade.

The present invention not only has higher bending resistance, twisting strength and large rigidity, also have in the present invention many technological schemes available, from Fig. 6, Fig. 7 c, Fig. 8 c, Fig. 9 a, Fig. 9 b, Figure 10 a, Figure 10 b, Figure 11 also can find out, in such scheme, all there is overhanging beam structure, it not only has higher bending resistance, twisting strength, and the length of its sponson can freely design, this just for this reason the natural frequency of vibration of cancelled structure not with cabin, gear-box, bearing, the isostructural natural frequency of vibration of pylon is identical or become multiple relation to create condition, also for alleviating the coupled vibrations of blade and air-flow, created condition.These are all conducive to extend the working life on blade, cabin, gear-box, bearing, pylon, basis etc., reduce cost and the maintenance cost of above-mentioned member, increase reliability of structure.

Claims (10)

1. a blade can be the horizontal axis wind-driven generator that lattice connects, it is characterized in that: on each blade of described horizontal axis wind-driven generator, there is a female blade and a turning blade, described in each, turning blade can be turned back at the far-end of female blade, and each turning blade after turning back is overlapped on female blade of adjacent blades, and fix it, or each turning blade after turning back is overlapped on the wheel hub of described horizontal axis wind-driven generator and is fixed, to form lattice linkage structure.

2. blade according to claim 1 can be the horizontal axis wind-driven generator that lattice connects, it is characterized in that: female blade and turning blade connecting part are provided with running shaft, at described running shaft upper sleeve through, there are three groups of separate axle sleeves, described three groups of separate axle sleeves respectively with female blade, turning blade and a force transmitting board Joint, between one side of described force transmitting board and described turning blade, with jack on a group, be connected, between the opposite side of described force transmitting board and described female blade, with jack under a group, be connected.

3. blade according to claim 1 can be the horizontal axis wind-driven generator that lattice connects, it is characterized in that: when turning angle is less than 180 while spending, female blade and turning blade join with running shaft, and between the pedestal of jack on female blade and turning blade, directly with jack, be connected, to control the relative angle between female blade and turning blade.

4. blade according to claim 1 can be the horizontal axis wind-driven generator that lattice connects, it is characterized in that: the lap-joint of described turning blade and adjacent blades or wheel hub utilizes overlap joint locking device to fix, and described overlap joint locking device is the locking jaw driving with jack; On described adjacent blades or wheel hub, for the position contacting with turning blade, be provided with the pulvinus identical with turning blade gabarit, on pulvinus, be covered with soft and wear-resisting material.

5. blade according to claim 1 can be the horizontal axis wind-driven generator that lattice connects, it is characterized in that: between described female blade and described turning blade, be also connected with at least one Leaf, described at least one Leaf and described female blade form retractable blades or collapsible blade.

6. blade according to claim 1 can be the horizontal axis wind-driven generator that lattice connects, it is characterized in that: the far-end of described turning blade is also extended with at least one blades, described at least one blades forms retractable blades or collapsible blade.

7. a blade can be the horizontal axis wind-driven generator that lattice connects, the number of blade of described wind-driven generator equals one or two, it is characterized in that: the hub access that is provided with perforation in wheel hub, two integrated movable blades are parallel to each other and are oppositely plugged in hub access, every a slice integrated movable blade moves with locking device and drives by blade, can move and locate and tighten up relative to hub access, the blade tip of described integrated movable blade can be retracted, and blade root is stretched out from hub access, the blade root of every a slice integrated movable blade together with being fixed tightly in overlap joint locking device between another integrated movable blade, form lattice linkage structure.

8. blade according to claim 7 can be the horizontal axis wind-driven generator that lattice connects, and it is characterized in that: described blade moves and comprises with locking device the driving wheel contacting with described blades and make described hub access and jack that driving wheel and blade maintenance are close to.

9. blade according to claim 7 can be the horizontal axis wind-driven generator that lattice connects, and it is characterized in that: described overlap joint locking device is the locking jaw driving with jack.

10. a blade can be the horizontal axis wind-driven generator that lattice connects, comprise female blade and blades that at least one pair of can stretch relatively, blades is sleeved in female blade, and is moved with locking device and realized fore and aft motion and spacing by the blade between female blade and blades; It is characterized in that: blades Stepwize Shrink enters in female blade, while stopping also operation, at least the far-end at female blade has two places separated by a distance to move with locking device and lock with blade, or the part outside this two place arranges more blade and moves and locking device, make to form lattice linkage structure between blades and female blade.