CN103291539B - Blade swing wing design method and H-type vertical axis wind turbine with blade swing wings - Google Patents
Blade swing wing design method and H-type vertical axis wind turbine with blade swing wings Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a blade swing wing design method and an H-type vertical axis wind turbine with blade swing wings, and aims at solving the problem that an existing lift type vertical axis wind turbine is difficult to start by self at low wind speed, and improving operation performance of the wind turbine in a lift mode. The blade swing wing design method includes seven steps for determining structural parameters of each part of a swing wing of each blade. The H-type vertical axis wind turbine with the blade swing wings comprises a center shaft, a hub, N support arms, N rotation pairs, N swing arms and N blades, wherein N is an integer, and 2</=N</=6. The N blades are straight blades, the N support arms are distributed horizontally and evenly and arranged linearly or in a star shape, one end face of each support arm is fixedly connected to the hub, the hub vertically arranged above the center shaft, the N blades are fixedly connected to the other ends of the N support arms in a one-to-one correspondence manner, and every side end face of each swing wing is mounted on the inner side face of the corresponding blade through one rotation pair. The blade swing wing design method and the H-type vertical axis wind turbine can be applied to the communication field and the technical field of urban wind power utilization.
Description
Technical field
The present invention relates to the design method of the blade pendulum wing and the H type upright shaft wind motor of the band blade pendulum wing.
Background technique
Modern wind owner will be divided into two classes: horizontal-shaft wind turbine and upright shaft wind motor, and the commercial wind machine of current main flow is horizontal-shaft wind turbine.Although horizontal-shaft wind turbine is most widely used, also there are some technical problems, as maintenance difficult, must possess wind apparatus, manufacture cost high.Upright shaft wind motor mainly contains following potential advantages compared with horizontal-shaft wind turbine: (1), without the need to yaw device, can absorb the energy the wind comes from any direction; (2) power generation system of upright shaft wind motor and acceleration system are positioned at ground, and in installation and maintenance, upright shaft wind motor has more advantage; (3) noise produced during upright shaft wind motor work is lower than the horizontal-shaft wind turbine of same power; (4), in overall structure, upright shaft wind motor is simpler than horizontal-shaft wind turbine.Therefore, upright shaft wind motor is in outlying mountain area in recent years, has and apply more widely in communication base station and city Wind Power Utilization.
Upright shaft wind motor can be divided into two types again: a class utilizes resistance of air to do work (resistance type), and typical structure is Savonius type wind energy conversion system.It is made up of the semi-cylindrical blade of two axis misalignment, and its advantage is that detent torque is larger.Shortcoming is that rotating speed is slow, and wind energy utilization is lower, lacks competitiveness for generating, is applied to more and drives pumping for water pump or the slow-revving occasion of high pulling torque such as to calm the anger; Another kind of is utilize the lift of vane airfoil profile to do work (lift-type), more typically H type wind energy conversion system.Lifting upright shaft wind energy conversion system is high compared with the wind energy utilization of shaft resistance type windmill, can high rotating speed run, but its to there is starting torque less, be generally difficult to the shortcoming realizing self-starting under low wind speed.
In published Chinese patent application, mainly contain three kinds and typically improve the method that lifting upright shaft wind energy conversion system starts ability.The first is directly combined resistance type wind wheel and lifting wind wheel, and the high pulling torque produced when utilizing resistance type wind wheel to rotate drives lifting wind wheel to start, as patent documentation 1:CN201412269Y; The second is the startability being strengthened lift-type wind energy conversion system by the method for vane propeller-changing distance, as patent documentation 2:CN1109818C; The third is by changing blade structure, increases the self-starting realizing wind wheel by aerofoil, as patent documentation 3:CN1938516A.But all there are some problems in practical application in these three kinds of typical methods.
With the first method that patent documentation 1 is representative, although can effectively realize wind wheel self-starting, the rated operation after having started, resistance type wind wheel hinders the raising of whole wind energy conversion system ride quality.In addition, resistance type wind wheel is installed whole wind energy conversion system quality is increased, increase manufacture and installation cost.With the second method that patent documentation 2 is representative, because its propeller pitch angle (i.e. deflection angle of blade) can only change within the specific limits, make the wind-engaging surface area of blade less, the startability of low wind friction velocity apparatus for lower wind machine is improved not obvious.And feather requires in wind wheel rotary course, each blade rotates around respective rotary shaft blade respectively, weakens the reliability of wind energy conversion system run time organization.With the third method that patent documentation 3 is representative, can provide larger blowing area by aerofoil, wind wheel structure is also relatively simple.But, be subject to the unwind force that spring applies all the time, being in deployed condition all the time lower than during regulation wind speed round by aerofoil.In wind wheel start-up course (before namely closing completely by aerofoil), wind wheel will be subject to from the larger resistance of air of wind-engaging plate lee face, the rapid raising of restriction wind speed round, the starting time of low wind friction velocity apparatus for lower wind machine is extended, even causes the working state of wind energy conversion system cannot be converted into lift-type by resistance type.
The method of these three kinds enhancing lifting upright shaft wind energy conversion system self-startup abilities, inherently by providing more blowing area for wind wheel, the blade making to be in district with the wind obtains each large air push power, but also makes the blade being in adverse wind zone be subject to more resistance of air effect.Further, as lifting upright shaft wind energy conversion system, these three kinds of methods all do not make the aeroperformance of start-up course Leaf improve, and the ride quality having started rear lift mode apparatus for lower wind machine does not also improve.Particularly in patent documentation 3, the rotating shaft position of barge board at blade chord length 30% ~ 45% place, this will cause blade surface air-flow occur in advance turn twist, seriously reduce the lift coefficient of blade.
Summary of the invention
The object of the invention is the problem being difficult to self-starting in order to solve existing lifting upright shaft wind energy conversion system at low wind speeds, simultaneously in order to improve ride quality under wind energy conversion system lift mode, and a kind of blade pendulum wing design method and a kind of H type upright shaft wind motor with the pendulum wing are proposed.A kind of blade pendulum wing design method in the present invention is carried out according to the following steps:
1, the work wind speed of wind energy conversion system is determined, resisting moment when wind energy conversion system starts, the length of blade, the chord length of blade and the wind wheel turning radius;
2, according to the work wind speed of wind energy conversion system, the length of blade, resisting moment when wind energy conversion system starts and wind wheel turning radius determination wind energy conversion system start mathematical model;
3, determine to put the friction torque when wing rotates, the density of processing pendulum wing material therefor, the rotating speed of wind wheel when the thickness of the pendulum wing and the pendulum wing close;
4, according to length of blade, the friction torque when pendulum wing rotates, when the density of processing pendulum wing material therefor and the pendulum wing close, the rotating speed of wind wheel determines pendulum wing closure condition mathematical model;
5, determine the width of the pendulum wing according to wind energy conversion system startup mathematical model and pendulum wing closure condition mathematical model and put the length exceeding blade trailing edge after the wing closes;
6, according to the chord length of blade, the length exceeding blade trailing edge after the width of the pendulum wing and the pendulum wing close is determined to put wing mounting point on blade;
7, according to the material of the pendulum wing, the length of blade, the width of the pendulum wing, manufacturing and the installation of the pendulum wing are implemented in the thickness of the pendulum wing and pendulum wing mounting point on blade.
A kind of H type upright shaft wind motor with the blade pendulum wing in the present invention, comprising: central shaft 1, wheel hub 2, N number of support arm 3, N number of revolute pair 4, N number of pendulum wing 5 and N number of blade 6 are formed, and N is natural number and 2≤N≤6; Described N number of blade 6 is prismatic blade, N number of support arm 3 level is uniform and arrange in in-line or star, one end face of N number of support arm 3 is all on the hub 2 affixed, wheel hub 2 is vertically set on the top of central shaft 1, N number of blade 6 is fixed in the other end of N number of support arm 3 correspondingly, and a side end face of each pendulum wing 5 is arranged on the inner side surface of corresponding blade 6 by a revolute pair 4.
A kind of working principle of the H type upright shaft wind motor with the blade pendulum wing: as shown in Figure 2, when air draught flows through blade surface, because the pendulum wing exceeds blade trailing edge certain length, airflow function is in this section pendulum wing surface, promote the pendulum wing to be rotated to B position by A position around revolute pair 4, now, put the wing and there is maximum wind-exposuring area.Air draught acts on the resistance of air putting the generation of wing inner surface and can promote the rotation of whole wind wheel subsequently.In wind wheel rotary course, the resistance of air promotion wing flap that air draught acts on the generation of pendulum wing outer surface rotates to A position, to reduce resistance when wind wheel rotates, namely put the wing and can provide larger wind-exposuring area for the startup of upright shaft wind motor, automatically can adjust with the resistance reduced when wind wheel rotates in wind wheel rotates again.
By arranging limit stoper, the blade surface of wheel hub 2 is pointed to for benchmark with Normal direction, each pendulum wing 5 is 0 ° ~ 90 ° around revolute pair 4 rotation angle range, guarantees in wind energy conversion system start-up course, and the pendulum wing 5 can rotate on-off action around revolute pair 4 by self adaption wind speed and direction.When wind wheel is blown in direction to wind shown in V from Fig. 3 a, put wind-engaging inside the wing in Fig. 3 a on the left of wind wheel and wind-engaging outside the wing is put on right side.The outside of the right side pendulum wing is subject to air effect power of the wind comes from, and makes the pendulum wing rotate around revolute pair and reduce blowing area, and rotates to the position being close to blade.Be subject to air effect power of the wind comes from inside the pendulum wing of left side, rotate to having maximum blowing area position, but cannot be rotated further due to the position-limiting action of support arm lower surface.The difference of blowing area makes two pieces to put the resistance of air difference that the wing produces and causes wind resistance difference, and consequent moment promotes wind wheel direction shown in n in Fig. 3 a and rotates.Along with the rising of wind speed round, the air effect power be subject to outside the pendulum wing also increases gradually and exceedes the air effect power suffered by inner side, and the centrifugal force of pendulum suffered by the wing also increases gradually simultaneously, causes two pieces to put the wing and all rotates to the inside around revolute pair.Put the wing to be close to blade (close) no longer to open when rotating speed reaches certain value, now wind energy conversion system relies on straight-vaned lift to do work driving completely, as shown in Figure 3 b.
When blade 6 be in the wind district time, pendulum the wing automatically open, the blowing area of blade 6 can be increased, be conducive to wind energy conversion system start; When blade is in adverse wind zone, the pendulum wing closes automatically, can reduce the resistance of air be subject to when wind energy conversion system starts.The pendulum wing 5 is in H type upright shaft wind motor start-up course, open closed action hockets, region between the pendulum wing 5 and blade 6 can form an area of low pressure, this region can increase the pressure difference between blade 6 suction surface and pressure side, alleviate the trailing edge flow separation phenomenon that start-up course Leaf 6 occurs owing to being in large attack angle state, improve the overall characteristic in air flow over blade flow field, thus improve the lift coefficient of wind energy conversion system start-up course Leaf, be conducive to wind energy conversion system and complete start-up course quickly, see Fig. 4.Centrifugal force suffered by the pendulum wing 5 makes it relative vane 6 and closes completely and exceed blade 6 trailing edge certain length, namely the actual chord length L of blade 6 is larger than former chord length L0, increases chord length reynolds' number, thus improves the aeroperformance of blade 6, reach the object of the service behaviour improving wind energy conversion system, see Fig. 5.
The present invention includes following beneficial effect:
1, start at low wind speeds, the pendulum wing can rotate around revolute pair by self adaption wind speed and direction, and namely relative vane does open closed action.Blade be in the wind district time, pendulum the wing opened by air push, the blowing area of blade can be increased, be conducive to wind energy conversion system start.When blade is in adverse wind zone, the pendulum wing, then because air push closes, can reduce the resistance of air that blade is subject to, thus can ensure that low wind speed starts.
2, the wing is put in H type upright shaft wind motor start-up course, open closed hockets, region between the pendulum wing and blade surface can form an area of low pressure, this region can increase the pressure difference between suction surface and pressure side, alleviate in start-up course, the trailing edge flow separation phenomenon that blade occurs owing to being in large attack angle state, improves the overall characteristic in air flow over blade flow field, thus improve wind energy conversion system start-up course Leaf lift coefficient, be conducive to wind energy conversion system and complete start-up course quickly.
3, when wind energy conversion system rotating speed reaches after according to the determined a certain numerical value of pendulum wing design method, the pendulum wing is completely closed by centrifugal action relative vane, and wind energy conversion system changes lift mode into.Now, after the pendulum wing is closed, exceed blade trailing edge certain length, the camber of vane airfoil profile and chord length are increased, improves the overall aeroperformance of blade to a certain extent, thus improve the ride quality of wind energy conversion system under lift mode.
4, compared with the method strengthening H type upright shaft wind motor self-starting performance with other, under equal service condition, the present invention makes the manufacture cost of wind energy conversion system reduce, easy to installation and maintenance, both H type upright shaft wind motor self-starting problem had at low wind speeds been solved, the ride quality of wind energy conversion system under lift mode can be improve again, suitable for large-scale promotion.
Accompanying drawing explanation
Fig. 1 is the H type upright shaft wind motor structural representation of the band pendulum wing, and in figure, 1 is central shaft, and 2 is wheel hubs, and 3 is support arms, and 4 is revolute pairs, and 5 is pendulum wings, and 6 is blades; Fig. 2 is pendulum wing opening and closing working principle schematic diagram; Fig. 3 a puts wind energy conversion system view when chord is opened; Fig. 3 b puts wind energy conversion system view when the wing closes; Fig. 4 is the schematic diagram that pendulum wing on-off action improves blade flow field characteristic; Fig. 5 is that the pendulum wing closes rear blade view.
Embodiment
Embodiment one: Leaf pendulum wing design method of the present invention comprises following 7 steps:
1, the work wind speed of wind energy conversion system is determined, resisting moment when wind energy conversion system starts, the length of blade, the chord length of blade and the wind wheel turning radius;
2, according to the work wind speed of wind energy conversion system, the length of blade, resisting moment when wind energy conversion system starts and wind wheel turning radius determination wind energy conversion system start mathematical model;
3, determine to put the friction torque when wing rotates, the density of processing pendulum wing material therefor, the rotating speed of wind wheel when the thickness of the pendulum wing and the pendulum wing close;
4, according to length of blade, the friction torque when pendulum wing rotates, when the density of processing pendulum wing material therefor and the pendulum wing close, the rotating speed of wind wheel determines pendulum wing closure condition mathematical model;
5, determine the width of the pendulum wing according to wind energy conversion system startup mathematical model and pendulum wing closure condition mathematical model and put the length exceeding blade trailing edge after the wing closes;
6, according to the chord length of blade, the length exceeding blade trailing edge after the width of the pendulum wing and the pendulum wing close is determined to put wing mounting point on blade;
7, according to the material of the pendulum wing, the length of blade, the width of the pendulum wing, manufacturing and the installation of the pendulum wing are implemented in the thickness of the pendulum wing and pendulum wing mounting point on blade.
Embodiment two: present embodiment is further illustrating embodiment one, calculates the work wind speed of wind energy conversion system according to the mean wind velocity of region, wind energy conversion system place wind regime in step one; According to installing the blade pendulum concrete condition of wind energy conversion system transmission system of the wing and the technical data of institute's auxiliary generator, calculate wind energy conversion system pneumatic time the required resisting moment overcome; According to the concrete geometric parameter of wind mill wind wheel need installing the blade pendulum wing, measure the length obtaining blade, the chord length of blade and the wind wheel turning radius.
Embodiment three: present embodiment is further illustrating embodiment one or two, the calculating formula that wind energy conversion system described in step 2 starts mathematical model is:
; In formula, M
sfor the resisting moment overcome required when wind energy conversion system starts, V
afor the work wind speed of wind energy conversion system, C
1for putting the width of the wing, H is the length of blade, and R is the turning radius of wind wheel.
Embodiment four: present embodiment is further illustrating one of embodiment one to three, according to the particular type of pendulum wing revolute pair used in step 3, calculates the friction torque when pendulum wing rotates; The pendulum thin aluminium alloy plate of wing material selection or sheet iron, can be checked in the density of pendulum wing material by technical data; Determine according to the trailing edge thickness of pneumatic equipment blades made the thickness putting the wing, the trailing edge thickness of pneumatic equipment blades made is obtained by actual measurement, and the thickness of the pendulum wing is no more than 8% ~ 12% of trailing edge thickness; Calculate the rotating speed of wind wheel when the pendulum wing closes according to the work wind speed of wind energy conversion system and the wind wheel turning radius, specific formula for calculation is:
in formula, n is the rotating speed putting wind wheel when the wing closes, V
afor the work wind speed of wind energy conversion system, R is the turning radius of wind wheel.
Embodiment five: present embodiment is further illustrating one of embodiment one to four, putting wing closure condition calculated with mathematical model formula described in step 4 is:
; In formula, M
ffor the friction torque of revolute pair, V
afor work wind speed, C
1for pendulum wing width, Δ C
1exceed the length of blade trailing edge for putting the wing, ρ is pendulum wing density of material, and T is pendulum wing thickness, and H is length of blade, and R is the turning radius of wind wheel, and n is the rotating speed putting wind wheel when the wing closes.
Embodiment six: present embodiment is further illustrating one of embodiment one to five, exceeds the length of blade trailing edge, by formula after the width of the pendulum wing described in step 5 and the pendulum wing close
with
Simultaneous calculates.
Embodiment seven: present embodiment is further illustrating one of embodiment one to six, put wing mounting point on blade described in step 6 and exceed the length of blade trailing edge by calculating after being closed by the chord length of blade, the width of the pendulum wing and the pendulum wing, calculating formula is: X=C-C
1+ △ C
1; Wherein, X is the distance of pendulum wing mounting point distance blade inlet edge, and C is blade chord length, C
1for pendulum wing width, Δ C
1for the pendulum wing exceeds the length of blade trailing edge.
Embodiment eight: a kind of H type upright shaft wind motor with the pendulum wing in the present invention, comprising: central shaft 1, wheel hub 2, N number of support arm 3, N number of revolute pair 4, N number of pendulum wing 5 and N number of blade 6 are formed, and N is natural number and 2≤N≤6; Described N number of blade 6 is prismatic blade, N number of support arm 3 level is uniform and arrange in in-line or star, one end face of N number of support arm 3 is all on the hub 2 affixed, wheel hub 2 is vertically set on the top of central shaft 1, N number of blade 6 is fixed in the other end of N number of support arm 3 correspondingly, one side end face of each pendulum wing 5 is arranged on the inner side surface of corresponding blade 6 by a revolute pair 4, sees Fig. 1.
For verifying that beneficial effect of the present invention has done following confirmatory experiment: adopt small size H type wind energy conversion system Laboratory Furniture to carry out confirmatory experiment in low-speed DC wind-tunnel, blade adopts NACA0015 aerofoil profile, chord length C=60mm, length H=300mm, wind wheel turning radius R=200mm, wind-tunnel outlet mean wind velocity V=5.5m/s, work average Reynolds numbdr is 10
5magnitude, pendulum wing key dimension C
1=30mm, Δ C
1=5mm, the pendulum wing utilizes support arm spacing.Experiment records: the Laboratory Furniture starting time not with the pendulum wing is 235s, and installing pendulum wing Laboratory Furniture of the present invention starting time is 108s; Laboratory Furniture stable operation rotating speed not with the pendulum wing is 258r/min, and the Laboratory Furniture stable operation rotating speed installing the pendulum wing of the present invention is 280r/min.Confirmatory experiment shows, after adopting the pendulum wing of the present invention, the starting time of H type upright shaft wind motor shortens 54%, and stabilized (steady-state) speed improves 8.5%, demonstrates feasibility and the superiority of the design method of the pendulum wing of the present invention and the H type upright shaft wind motor of the band pendulum wing.
Claims (8)
1. a design method for the blade pendulum wing, is characterized in that described design method, carries out according to the following steps:
One, the work wind speed of wind energy conversion system is determined, resisting moment when wind energy conversion system starts, the length of blade, the chord length of blade and the wind wheel turning radius;
Two, according to the work wind speed of wind energy conversion system, the length of blade, resisting moment when wind energy conversion system starts and wind wheel turning radius determination wind energy conversion system start mathematical model;
Three, determine to put the friction torque when wing rotates, the density of processing pendulum wing material therefor, the rotating speed of wind wheel when the thickness of the pendulum wing and the pendulum wing close;
Four, according to length of blade, the friction torque when pendulum wing rotates, when the density of processing pendulum wing material therefor and the pendulum wing close, the rotating speed of wind wheel determines pendulum wing closure condition mathematical model;
Five, determine the width of the pendulum wing according to wind energy conversion system startup mathematical model and pendulum wing closure condition mathematical model and put the length exceeding blade trailing edge after the wing closes;
Six, according to the chord length of blade, the length exceeding blade trailing edge after the width of the pendulum wing and the pendulum wing close is determined to put wing mounting point on blade;
Seven, according to the material of the pendulum wing, the length of blade, the width of the pendulum wing, manufacturing and the installation of the pendulum wing are implemented in the thickness of the pendulum wing and pendulum wing mounting point on blade.
2. method as claimed in claim 1, is characterized in that the work wind speed calculating wind energy conversion system in step one according to the mean wind velocity of region, wind energy conversion system place wind regime; According to installing the blade pendulum concrete condition of wind energy conversion system transmission system of the wing and the technical data of institute's auxiliary generator, calculate wind energy conversion system pneumatic time the required resisting moment overcome; According to the concrete geometric parameter of wind mill wind wheel need installing the blade pendulum wing, measure the length obtaining blade, the chord length of blade and the wind wheel turning radius.
3. method as claimed in claim 2, is characterized in that the calculating formula that wind energy conversion system described in step 2 starts mathematical model is:
in formula, M
sfor the resisting moment overcome required when wind energy conversion system starts, V
afor the work wind speed of wind energy conversion system, C
1for putting the width of the wing, H is the length of blade, and R is the turning radius of wind wheel.
4. method as described in any one of claims 1 to 3, is characterized in that the particular type according to pendulum wing revolute pair used in step 3, calculates the friction torque when pendulum wing rotates; The pendulum thin aluminium alloy plate of wing material selection or sheet iron, can be checked in the density of pendulum wing material by technical data; Determine according to the trailing edge thickness of pneumatic equipment blades made the thickness putting the wing, the trailing edge thickness of pneumatic equipment blades made is obtained by actual measurement, and the thickness of the pendulum wing is no more than 8% ~ 12% of trailing edge thickness; Calculate the rotating speed of wind wheel when the pendulum wing closes according to the work wind speed of wind energy conversion system and the wind wheel turning radius, specific formula for calculation is:
in formula, n is the rotating speed putting wind wheel when the wing closes, V
afor the work wind speed of wind energy conversion system, R is the turning radius of wind wheel.
5. method as claimed in claim 4, is characterized in that putting wing closure condition calculated with mathematical model formula described in step 4 is:
In formula, M
ffor the friction torque of revolute pair, V
afor work wind speed, C
1for pendulum wing width, Δ C
1exceed the length of blade trailing edge for putting the wing, ρ is pendulum wing density of material, and T is pendulum wing thickness, and H is length of blade, and R is the turning radius of wind wheel, and n is the rotating speed putting wind wheel when the wing closes.
6. method as claimed in claim 5, is characterized in that the length exceeding blade trailing edge after the width of the pendulum wing described in step 5 and the pendulum wing close, by formula
with
Simultaneous calculates.
7. method as claimed in claim 6, it is characterized in that being that putting wing mounting point on blade described in step 6 exceeds the length of blade trailing edge by calculating after being closed by the chord length of blade, the width of the pendulum wing and the pendulum wing, calculating formula is: X=C-C
1+ Δ C
1; Wherein, X is the distance of pendulum wing mounting point distance blade inlet edge, and C is blade chord length, C
1for pendulum wing width, Δ C
1for the pendulum wing exceeds the length of blade trailing edge.
8. the H type upright shaft wind motor of the blade pendulum wing obtained with design method as claimed in claim 1, it is characterized in that described wind energy conversion system, comprise: central shaft (1), wheel hub (2), N number of support arm (3), N number of revolute pair (4), N number of pendulum wing (5) and N number of blade (6) are formed, and N is natural number and 2≤N≤6; Described N number of blade (6) is prismatic blade, N number of support arm (3) level is uniform and arrange in in-line or star, one end face of N number of support arm (3) is all fixed on wheel hub (2), wheel hub (2) is vertically set on the top of central shaft (1), N number of blade (6) is fixed in the other end of N number of support arm (3) correspondingly, and a side end face of each pendulum wing (5) is arranged on the inner side surface of corresponding blade (6) by a revolute pair (4).
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| CN106050556A (en) * | 2016-08-15 | 2016-10-26 | 上海理工大学 | Self-adaptive flexible blade of vertical-shaft wind turbine |
| CN107676225A (en) * | 2017-09-29 | 2018-02-09 | 天津大学 | A kind of small-sized asymmetric wing prismatic blade vertical axis aerogenerator |
| CN110296041A (en) * | 2018-03-22 | 2019-10-01 | 梁北岳 | One axis multimachine aerodynamic decelerator single armed of jack-post structure rises resistance and combines vertical axis windmill |
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| CN102933840A (en) * | 2010-05-10 | 2013-02-13 | 达姆施塔特技术大学 | Invention relating to rotor blades in particular for wind power installations |
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| CN103291539A (en) | 2013-09-11 |
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