CN115324820A

CN115324820A - Vertical axis lift force type wind turbine with typhoon deformation preventing mechanism

Info

Publication number: CN115324820A
Application number: CN202211164993.7A
Authority: CN
Inventors: 昂海松
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-11-11

Abstract

The invention discloses a vertical axis lifting force type wind turbine with a typhoon deformation preventing mechanism, which is suitable for high-speed rotation and can generate high-power generation. In order to fully utilize wind energy to generate electricity, wind power generators are often arranged at seaside or in places where strong wind prevails. However, strong typhoons often cause great damage to the structure of the wind driven generator, such as tearing of the wind turbine blades and breaking of the wind turbine struts. The vertical axis lift type wind turbine is simple in structure and convenient to manufacture and maintain, but is difficult to bear the threat of typhoons or hurricanes. In order to utilize the wind energy of a strong wind and prevent the invasion of typhoon, the invention designs a vertical shaft lift force type wind turbine with a typhoon deformation prevention mechanism, which can automatically convert the wind wheel blade in a working state into a closed slender body curved surface state through a set of designed automatic deformation system when the typhoon occurs, thereby greatly reducing the destructive power of the typhoon to the wind turbine.

Description

Vertical axis lift force type wind turbine with typhoon deformation preventing mechanism

The technical field is as follows:

the invention relates to a wind power generation device, in particular to a vertical axis lifting force type wind turbine with a typhoon deformation preventing mechanism, and belongs to the field of wind power generators.

Background art:

at present, a vertical axis (namely, a rotating shaft of a wind turbine is along the vertical direction) lift force type wind driven generator is greatly developed because the wind turbine does not need to be provided with a yaw structure, is not influenced by the wind direction, has a simple structure and is convenient to manufacture and maintain, and particularly, the vertical axis lift force type wind turbine is suitable for high-speed rotation and can generate high-power generation. However, most of the structures of the existing vertical axis lift type wind driven generators are rectangular straight blades with equal chord lengths, the structures are subjected to large bending moment, and the existing lift type wind driven generators are easily damaged under the action of typhoon.

The invention particularly provides a design of a vertical shaft lifting force type wind turbine with a typhoon deformation preventing mechanism, aiming at solving the problems that a vertical shaft lifting force type wind turbine can normally work under the conventional wind speed, and the deformation of a wind wheel can be automatically realized when typhoon occurs, so that a configuration with small wind resistance is formed, and the purpose of preventing the typhoon from causing damage to the wind turbine is achieved.

The invention content is as follows:

the invention provides a vertical axis lift force type wind turbine with a typhoon deformation prevention mechanism for solving the problems in the prior art, which can overcome the problem that the structure of a vertical axis lift force type generator is damaged by typhoon.

The technical scheme adopted by the invention is as follows: a vertical axis lift force type wind turbine with a typhoon deformation prevention mechanism comprises a support column, a lift force type wind wheel and an automatic deformation system;

the lift type wind wheel comprises N blades surrounding a strut at equal angles, the cross section of each blade of the lift type wind wheel is a high-lift wing type, the vertical section of each blade is in a circular arc shape, and the chord length C (z) of the cross section of each blade at the height z is given by the following calculation formula:

in the formula: setting the center of a coordinate system at the center point of the blade, wherein z is the vertical height value of the blade from the center point, R is the radius R of a blade arc bus, h (z) is the chord camber height of the blade at the height z, and hm is the maximum camber height of the middle section of the blade, and the design of the shape ensures that N blades can form a closed curved polyhedron after inward displacement;

the automatic morphing system comprises a typhoon sensing and alarming device and a morphing mechanism, wherein the typhoon sensing and alarming device comprises an anemoscope arranged on the top of a support, a wireless transmitting module matched with the anemoscope and a signal receiving module arranged on the morphing mechanism;

when the anemoscope senses that the wind speed reaches a typhoon level, the wireless transmitting module sends a typhoon alarm signal, the signal receiving module receives the wireless alarm signal, the signal receiving module receives the typhoon alarm signal and immediately starts the electronic driving board, the electric worm wheel is started and then moves backwards along the worm, and the N blades move inwards to form a long, thin and closed curved polyhedron.

Furthermore, each blade is provided with an upper pair of deformation mechanisms and a lower pair of deformation mechanisms, each deformation mechanism comprises a support rod front section, a support rod rear section, a worm, a precession worm gear set, a pull rod and a folding structure, the support rod front section and the support rod rear section are connected through the folding structure, the worms are parallelly installed on the horizontal side face of the support rod rear section, the precession worm gear set is sleeved on the worm, the precession worm gear set comprises an electronic drive plate, an electric worm wheel and a precession worm gear set shell, one end of the pull rod is hinged with the blade, the other end of the pull rod is hinged with the precession worm gear set shell, the support rod rear section comprises a thrust pin and a compression spring ejector rod which props against the thrust pin, the support rod front section comprises a locking stop block which is blocked by the thrust pin, the precession worm gear set shell is fixedly connected with a conical shifting block, when the precession worm gear set shell moves, the conical shifting block shifts away the thrust pin of the folding structure to separate from the stop block, the support rod front section and the support rod rear section are folded and deformed under the action of the pull rod and the support rod until the blade moves inwards until the root of the precession worm gear set moves.

The invention has the following beneficial effects:

(1) The vertical axis lifting force type wind turbine with the typhoon deformation preventing mechanism provided by the invention can efficiently utilize wind energy to generate power at the conventional wind speed and is not influenced by the wind direction, and the vertical axis lifting force type wind turbine blade is designed into a vertical long arc-shaped high-thrust wing section with a high section, so that the wind energy utilization rate is good, and the bearing distribution structure is reasonable.

(2) Typhoon can be sensed automatically and typhoon can be prevented by automatic deformation.

(3) The typhoon deformation prevention design can strictly give the three-dimensional shape of the curved surface of the blade by using a calculation formula according to different blade numbers, and the blade can efficiently generate power before the position of the blade is deformed; after the wind wheel is deformed and folded, the wind wheel is strictly folded into a close integral slender curved polyhedron, the acting force of typhoon on the slender closed body is greatly reduced, and the damage of typhoon on the wind machine can be prevented.

(4) The deformation mechanism designed by the invention has the advantages that the main body is composed of a mechanical structure, the deformation mechanism is reliable, the shape of the blade and the configuration of the deformation wind wheel are strictly deduced, and the sealing deformation can be accurately controlled.

(5) According to different requirements, the vertical axis lift force type wind turbines with different sizes and different blade numbers and capable of preventing typhoon automatic deformation can be designed according to the invention, and the large-size wind driven generators can also be used for networking power supply and environments of seaside and desert super-large wind fields.

Description of the drawings:

FIG. 1 is a schematic view of an operating condition of a wind turbine according to the present invention.

Fig. 2 (a) is a side view of the wind rotor of the present invention in an unfolded state.

Fig. 2 (b) is a plan view of the wind rotor of the present invention in an unfolded state.

FIG. 3 is a schematic diagram of the thrust of a vertical axis lift type wind turbine of the present invention.

Fig. 4 (a) is a schematic vertical view of the wind turbine in the closed state.

FIG. 4 (b) is a schematic top view of a closed wind wheel of a wind turbine according to the present invention.

FIG. 5 (a) is a theoretical drawing of the base configuration of a single blade of the present invention.

Fig. 5 (b) is another theoretical drawing of the single blade base configuration of the present invention.

FIG. 6 is a theoretical plot of a single blade generatrix calculation of the present invention.

Figure 7 is a theoretical drawing of the geometry of a 4-blade rotor of the present invention.

Figure 8 is a theoretical drawing of the geometry of a 6-blade rotor of the present invention.

Figure 9 is a theoretical drawing of the geometry of a 6-blade rotor of the present invention.

FIG. 10 is a theoretical drawing of the three-dimensional curved surface design of the blade of the present invention

Fig. 11 (a) is a schematic structural view of the blade of the present invention in an operating state.

Fig. 11 (b) is a schematic perspective view of the blade of the present invention in an operating state.

Fig. 12 is a schematic structural view of the working state of the deforming mechanism of the present invention.

Fig. 13 is a schematic view of the driving structure of the deforming mechanism of the present invention.

Fig. 14 (a) is a schematic view of a folding structure (working state) of the variant mechanism of the present invention.

Fig. 14 (b) is a schematic cut-away view of a folded configuration of a variation mechanism of the present invention.

Fig. 14 (c) is a schematic view of the folded structure unlocking of the variant mechanism of the present invention.

Fig. 14 (d) is a schematic angle change diagram of the folding structure of the variant mechanism of the present invention.

Fig. 15 is a schematic structural view of the deformation mechanism of the present invention in a closed state.

Fig. 16 (a) is a schematic structural view of the present invention in a closed state.

Fig. 16 (b) is a partial schematic view of the closed blade of the present invention.

FIG. 17 is a sectional airfoil view of a blade of the present invention.

In the figure: the wind power generation device comprises a support 1, a blade 4, a stay rod front section 5, a stay rod rear section 6, a worm 7, a precession worm gear set 8, a pull rod 9, a folding structure 10, a signal receiving module 11, an electronic driving plate 12, an electric worm wheel 13, a precession worm gear set shell 14, an anemograph 15, a wireless transmitting module 16, a compression spring ejector rod 17, a thrust pin 18, a stop block 19, a conical shifting block 20 and a generator 21.

The specific implementation mode is as follows:

the invention relates to a vertical shaft lift force type wind turbine with a typhoon deformation prevention mechanism, which comprises a support column 1, a lift force type wind wheel and an automatic deformation system, wherein the lift force type wind wheel comprises N blades 4 which surround the support column 1 at equal angles. The automatic morphing system comprises a typhoon sensing and alarming device and a morphing mechanism, wherein the typhoon sensing and alarming device comprises an anemoscope 15, a wireless transmitting module 16 and a signal receiving module 13, and the morphing mechanism comprises a strut front section 5, a strut rear section 6, a worm 7, a precession worm gear set 8, a pull rod 9 and a folding structure 10.

The cross section of the blade 4 of the lift type wind wheel 2 is a high lift wing type, the vertical section of the blade is a circular arc shape, and the distribution size of the chord line length of the cross section of the blade can be given by the calculation formula provided by the invention, so that when the deformation mechanism executes a typhoon-preventing instruction, N blades can be strictly folded into a closed curved polyhedron. When the deformation mechanism of the invention is in a normal working state, the blades generate a rotational tangential moment under the action of wind force, and the lifting force type wind wheel 2 rotates to drive the strut 1 and further drive the generator 21 (see figure 1).

The automatic deformation system can realize the above-mentioned automatic position deformation process of the blade 4: firstly, when the anemoscope 15 on the top of the support column senses that the wind speed reaches the typhoon level, a wireless transmitting module 16 matched with the anemoscope 15 sends out typhoon alarm signals, and a signal receiving module 11 arranged on the deformation mechanism 3 receives the wireless alarm signals. The front section 5 of the support rod of the deformation mechanism 3 is connected with the rear section 6 of the support rod by a folding structure 10, the worm 7 is arranged on the horizontal side surface of the rear section 6 of the support rod in parallel, and the precession worm wheel set 8 is sleeved on the worm 7. The precession worm gear set 8 is composed of a signal receiving module 11, an electronic driving plate 12, an electric worm gear 13 and a precession worm gear set shell 14, one end of a pull rod 9 is hinged with the blade 4, the other end of the pull rod is hinged with the precession worm gear set shell 14, when the signal receiving module 11 receives a typhoon alarm signal, the electronic driving plate 12 is started immediately, then the electric worm gear 13 is started to precess backwards along the worm 7, and the precession worm gear set shell 14 drives the pull rod 9 to move backwards. The electric worm wheel 13 is started to push the thrust pin 18 in the folding structure 10, and the strut front section 5 and the strut rear section 6 start folding deformation under the action of the pull rod 9. Because the stay bar front section 5 is hinged with the blades 4, the blades move inwards under the action of the pull rod 9 and the stay bar front section 5 until the precession worm gear set 8 moves to the root of the pull rod 9, and at the moment, N blades move inwards to form a slender closed curved polyhedron.

FIG. 1 is an overall three-dimensional configuration of a vertical axis lift type wind turbine with a typhoon deformation preventing mechanism according to the present invention in an operating state. FIG. 2 (a) is a side view of a wind turbine, and FIG. 2 (b) is a top view of the wind turbine. Compared with the conventional rectangular plane blade with straight extension length as a straight line, the spanwise projection of the blade is in a large arc shape, the section of the blade is in a rib shape with different chord lengths based on the designed airfoil profile, the chord length of the section of the blade is the largest in the middle, the chord length of the section of the blade is gradually reduced along the upper part and the lower part, and the three-dimensional curve shape of the side edge of the blade is strictly regulated. Compared with the conventional rectangular linear blade vertical axis lift type wind turbine, the vertical axis lift type wind turbine with the structure with the upper end and the lower end becoming smaller and the back arc-shaped has the advantages that the bending moment of the structure is small under the action of wind power, and the utilization coefficient of wind energy is high.

The biggest difference between the vertical axis lift force type wind turbine and the vertical axis resistance type wind turbine is as follows: the resistance type wind turbine is characterized in that a concave surface near one side has large wind-receiving resistance, and a convex surface at the other side has small leeward resistance to generate torque, and the rotating speed and the wind speed of the resistance type wind turbine are in the same level, so that the rotating speed and the generating power cannot be high; fig. 3 shows the forward aerodynamic principle of a vertical axis lift type wind turbine, wherein V is the wind speed, W is the relative wind speed, U blade linear velocity, and L is the lift. The vertical axis lift force type wind turbine generates forward thrust by depending on the projection component of the blade airfoil lift force L on the tangent line of the rotating circumference under the action of the wind speed and the rotating linear speed of the fan blade, and the thrust is larger (proportional to the square of the speed) when the rotating speed is larger. Therefore, the vertical axis lift type wind turbine can generate larger power than the vertical axis resistance type wind turbine.

Fig. 1, 2 (a), and 2 (b) are views showing the state of the rotor blade in the extended operation. However, the blade of the vertical axis lift force type wind turbine is not designed directly from the state of unfolding operation, but the overall shape of the wind wheel closed after the anti-typhoon is folded is designed firstly, and then the collective shape of a single blade is designed. Therefore, the overall appearance design of the wind wheel which is closed after the typhoon is prevented is started.

Fig. 4 (a) shows a curved polyhedral state in which the wind wheels (taking 4-blade wind wheels as an example) are closed after being folded, and the acting force of typhoon is reduced in the purpose. Fig. 4 (b) is a top view of the rotor, which is seen to be a curved multi (tetrahedron) with the outer edge of the blade section airfoil as a contour.

The design of the three-dimensional geometric shape of the curved blade needs to be comprehensively considered from the overall appearance of the folded wind turbine and the effect condition of the unfolded wind turbine. It is first determined to place several surrounding blades. Here, first, 4 surrounding blades are taken as an example.

And secondly, determining the overall basic shape of the folded wind wheel and the basic shape of a single blade, wherein the single blade is obtained by circumferentially dividing the overall shape into N (such as 4) equally, and the overall shape depends on the basic parameters of the single blade. FIGS. 5 (a) and 5 (b) show the basic shape of a single blade, wherein the vertical generatrix of the basic shape is an arc line, and the transverse section line of the basic shape is a ruled surface of an airfoil chord line; the actual blade profile is a three-dimensional curved surface body with the profile section boundary line as the inner surface and the outer surface on the basic profile.

(1) The specific shape of the curved multi (tetrahedron) bus is determined, and the bus is designed into a large arc section: firstly determining the distance h between the widest chord line of the middle section and the central axis of the strut after the folding _m And the distance h between the chord line of the sections at the upper end and the lower end and the central axis of the strut ₁ (for strut radii), then the arc radius R of the generatrix can be determined by three points (see 3 below) calculation of the blade geometry).

(2) And determining the overall basic shape of the folded wind wheel and the basic shape of a single blade. And rotating the arc section bus around the central axis of the support to obtain the shape of the folded integral foundation. And then the polyhedron is equally divided into N pieces according to the number N of the polyhedrons, and the shape of each curved surface is the basic shape of a single blade, so that the sealing property of the whole shape after the closure is ensured. The basic shape of the blade is only a straight curved surface which is based on a circular arc generatrix and has the width distribution of a longitudinal chord line.

The third step is to determine the actual three-dimensional shape of the individual blade. On the basis of the determined base shape and the wing shape of the blade, the cross section line of the base shape is taken as a chord line to construct a section line of an upper edge line and a lower edge line of the wing shape, and then the wing shape section line is swept by taking a generatrix as a guide line according to different chord lengths to form the three-dimensional curved surface shape of the blade.

And fourthly, connecting the shapes of N (such as 4) single blades by side generatrices to form the shape of the folded integral closed wind wheel.

Fifthly, the folded integral closed wind wheel is divided into N (such as 4) single blades, and the blades are further moved outwards for a certain distance according to the radius, so that the vertical axis lift type wind turbine with the special curved surface shape in the working state is formed (fig. 1, 2 (a) and 2 (b)).

3) Derivation of calculation formula for blade geometry

(1) Blade generatrix calculation and determination

Referring to fig. 6, let the theoretical chord length AB (chord length of central shaft after folding) of known blade generatrix be L, the theoretical arch height (distance from blade generatrix midpoint to central shaft after folding) of generatrix be h, let α BAM be α, let α AMH be _O β, and AM length l. The generating line is designed into the circular arc line, and its radius is R, then becomes the circle by three points, can know:

β＝90°-α

the radius of the generatrix arc is therefore:

the geometry of the bus-bar is then determined.

The base profile of a single blade (i.e. a ruled surface with the blade generatrix as the guide line and the varying section chord length as the transverse width, fig. 5) is determined according to different blade numbers.

(2) Take 4 blade designs as examples

Figure 7 gives a theoretical top view of a single blade for a 4-blade rotor. The circumference of 360 ° is divided into four, so ≈ BmODm =90 °. Let the theoretical length L of the generatrix be 6000mm and the theoretical arch height h be 500mm it is clear that OAm = h =500mm in fig. 6.

Thus, the median maximum chord length of the base profile ruled surface of a single blade is:

the chord length of any section of the blade can be obtained by analogy

c ₁ ＝B ₁ D ₁ ＝2OA ₁ ·tan 45°＝2OA ₁

The three-dimensional shape of the blade can be obtained by determining the straight-line curved surface of the basic shape of the blade and adding the upper and lower edge curves of the airfoil section.

(3) Take 6 blades as an example

Figure 8 gives a theoretical top view of a single blade for a 6 blade rotor. The circumference of 360 ° is divided into six, so ≈ BmODm =60 °. Let the theoretical length L of the generatrix be 6000mm and the theoretical arch height h be 500mm it is clear that OAm = h =500mm in fig. 8.

the chord length of any section of the blade can be obtained by analogy

c ₁ ＝B ₁ D ₁ ＝2OA ₁ ·tan30°＝OA ₁

(4) Take N blade designs as examples

Figure 9 gives a schematic view of a single blade cross section of a N-blade rotor. The circumference of 360 degrees is divided into N, and the angle BmODm =360 degrees/N. Setting the theoretical length L of a generatrix, the theoretical arch height h and the maximum chord length c of the middle cross section of the blade _max ,

The maximum chord length of the median cross section of a single blade is then:

referring to fig. 10, let a coordinate system center be at a blade center point, z be a blade vertical height value from the center point, and let a radius of a blade arc generatrix be R, that is, HOM = HOD = R; c (z) is the chord length of the cross section of the blade at the height z, h (z) is the chord camber height GD of the blade at the height z, and hm is the maximum camber height EM at the middle section of the blade. In order to obtain the chord length C (z) of any cross section of the N-divided single blade, the chord arch height h (z) of any cross section of the generatrix is required, as can be seen from fig. 9,

the generatrix chord arch height of any section is then:

wherein R is obtained from (1), (2), (3) and (4), and the maximum arch height hm is a known design value. Similarly, the chord length C (z) of any section of the blade can be obtained in the same way as (2):

the calculation formula for the curved surface profile design of the N blades is derived.

4) Design of automatic displacement deformation mechanism of blade

(1) Typhoon sensing and alarming device

As shown in fig. 11 (a) and 11 (b), the typhoon sensing and warning device is mounted on the top of the support 1 and comprises an anemometer 15 and a wireless transmitting module 16. When the anemoscope 15 senses that the wind speed reaches typhoon level, a matched wireless transmitting module 16 below the anemoscope 15 is installed to send out typhoon alarming wireless signals. Then, a signal receiving module 11 arranged on a precession worm gear set shell 14 receives a typhoon alarm wireless signal, and an electronic driving plate 12 is excited to execute the operation of a deformation mechanism.

(2) Design of deformation mechanism

The blades are in a closed state, and when the wind wheel works, a plurality of surrounding blades are radially displaced outwards to form a wind wheel in a circular array with a certain radius. On the contrary, when the wind wheel in work keeps out of the typhoon, the deformation mechanism displaces the blades inwards again until the blades are folded into a closed body. Fig. 1 is a schematic view of a rotor in an unfolded operation state, fig. 4 (a) is a schematic view of a rotor in a folded state, and fig. 11 (a) is a schematic view of a single blade in an unfolded operation state. Fig. 11 (b) is a top view of the single blade in the extended working state.

Fig. 12 shows the deformation mechanism of the single blade in the unfolded working state, which mainly comprises a front stay bar section 5, a rear stay bar section 6, a worm 7, a precession worm gear group 8, a pull rod 9 and a folding structure 10. At this time, the strut front section 5 and the strut rear section 6 are locked in a linear state by the folding structure 10. The worm 7 is arranged on the horizontal side surface of the stay bar rear section 6 in parallel, and the precession worm wheel set 8 is sleeved on the worm 7.

Fig. 13 shows a driving structure of the deforming mechanism of the present invention. The precession worm gear set 8 is composed of a signal receiving module 11, an electronic driving plate 12, an electric worm gear 13 and a precession worm gear set shell 14. One end of a pull rod 9 is hinged with the blade 4, and the other end is hinged with a precession worm gear set shell 14. When the signal receiving module 11 receives a typhoon alarm signal, the electronic driving board 12 is started immediately, then the electric worm wheel 13 is started and precesses backwards along the worm 7, and the precession worm wheel set shell drives the pull rod 9 to move backwards. The electric worm wheel 13 is started and pushes the thrust pin 18 of the folding structure 10, and the front section 5 and the rear section 6 of the stay bar start to fold and deform under the action of the pull rod 9; because the stay bar front section 5 is hinged with the blade, the blade is displaced inwards under the action of the pull rod 9 and the stay bar front section 5 until the precession worm gear group moves to the root of the pull rod.

Fig. 14 (a) shows the working state of the folding structure of the variant mechanism, the front strut section 5 and the rear strut section 6 are locked by the folding structure 10 into the same linear strut, and the blade in the working state is supported by two auxiliary struts at the upper and lower positions. Fig. 14 (b) shows a cut-away view of the folded configuration, and it can be seen that the compression spring ejector 17 in the strut rear section 6 bears against the thrust pin 18, and the stop 19 of the strut front section 5 is blocked and locked by the thrust pin 18, so that the strut front section 5 and strut rear section 6 are locked in line. Fig. 14 (c) shows the unlocking schematic diagram of the folding structure, when the conical shifting block 20 attached to the precession worm-gear set casing 14 shifts when the precession worm-gear set casing 14 shifts, the thrust pin 18 is shifted, the strut front section 5 and the strut rear section 6 begin to fold and deform under the action of the pull rod 9, and the conical shifting block 20 also disengages from the thrust pin 18. Fig. 14 (d) shows the folded configuration in a folded deformed state.

Fig. 15 shows the final deforming machine in a triangular locked position, the size of the deforming mechanism being determined by the distance of the leaves from the struts when deployed and the distance of the leaves from the struts when closed. The lengths of the stay bar front section 5, the stay bar rear section 6, the worm 7 and the pull rod 9 can be adjusted, and the shorter the pull rod 9 is, the larger the deformation distance is. But the deformed mechanism should be confined within the folded wind wheel curve. Fig. 15 shows a deformation mechanism with equal length of the strut front section 5, the strut rear section 6, the worm 7 and the pull rod 9.

Fig. 16 shows the structure diagram of the closed state of the blades, and a single blade has two upper and lower deformation mechanisms. The N blades are now displaced inwardly to form an elongate closed curved polyhedron (figure 4).

The design of the airfoil is an important element of the efficiency of the vertical axis lift type wind turbine. The invention adopts an asymmetric thick airfoil profile and carries out optimized modification, and the lift-drag ratio is large and the effective attack angle range is large through calculation. FIG. 17 provides a cross-sectional airfoil view of a blade.

The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.

Claims

1. The utility model provides a vertical axis lift type wind turbine with prevent typhoon deformation mechanism which characterized in that: comprises a support column (1), a lift type wind wheel and an automatic deformation system;

the lift type wind wheel comprises N blades (4) surrounding a strut (1) at equal angles, the cross section of each blade (4) of the lift type wind wheel (2) is a high-lift airfoil shape, the vertical section of each blade (4) is a circular arc, and the chord length C (z) distribution of the cross section of each blade at the height z is given by the following calculation formula:

in the formula: the center of a coordinate system is arranged at the center point of the blade (4), z is the vertical height value of the blade from the center point, R is the radius R of a blade arc bus, h (z) is the chord arch height of the blade at the height z, hm is the maximum arch height of the middle section of the blade, and the design of the shape ensures that N blades can form a closed curved polyhedron after being displaced inwards;

the automatic morphing system comprises a typhoon sensing and alarming device and a morphing mechanism, wherein the typhoon sensing and alarming device comprises an anemoscope (15) arranged on the top of the strut (1), a wireless transmitting module (16) matched with the anemoscope (15) and a signal receiving module (11) arranged on the morphing mechanism;

when the anemoscope (15) senses that the wind speed reaches a typhoon level, the wireless transmitting module (16) sends a typhoon alarm signal, the signal receiving module (11) receives the wireless alarm signal, the signal receiving module (11) receives the typhoon alarm signal and immediately starts the electronic drive board (12), the electric worm wheel (13) is started and then moves backwards along the worm (7), the precession worm wheel set shell (14) drives the pull rod (9) to move backwards, and N blades move inwards to form a long and thin closed curved polyhedron.

2. The vertical axis lift type wind turbine with the typhoon deformation preventing mechanism as claimed in claim 1, wherein: each blade (4) is provided with an upper pair and a lower pair of deformation mechanisms, each deformation mechanism comprises a support rod front section (5), a support rod rear section (6), a worm (7), a precession worm gear set (8), a pull rod (9) and a folding structure (10), the support rod front section (5) and the support rod rear section (6) are connected through the folding structure (10), the worms (7) are parallelly installed on the horizontal side surface of the support rod rear section (6), the precession worm gear set (8) is sleeved on the worms (7), the precession worm gear set (8) consists of an electronic drive plate (12), an electric worm wheel (13) and a precession worm gear set shell (14), one end of the pull rod (9) is hinged and connected with the blade (4), the other end of the pull rod (9) is hinged and connected with the precession worm gear set shell (14), the support rod rear section (6) comprises a thrust pin (18) and a compression spring ejector rod (17) for ejecting the thrust pin (18), the thrust pin (18) and a conical ejector pin (19) for blocking the thrust set (10) when the thrust set (9) moves, the conical ejector pin (10) is separated from the conical ejector pin (20), and the thrust set (10) is fixedly connected with the thrust pusher (10), and the thrust set (10), the thrust pusher (10) The blades are folded and deformed under the action of the pull rod (9) and the stay bar front section (5), and are displaced inwards until the precession worm gear set (8) moves to the root of the pull rod (9).