WO2010031200A1

WO2010031200A1 - A windmill device of a vertical shaft type wind power generation system and a method for controlling windmill blades thereof

Info

Publication number: WO2010031200A1
Application number: PCT/CN2008/001612
Authority: WO
Inventors: 向亚峰
Original assignee: Xiang Yafeng
Priority date: 2008-09-16
Filing date: 2008-09-16
Publication date: 2010-03-25

Abstract

A windmill device of a vertical shaft type wind power generation system and a method for controlling windmill blades thereof are provided. The windmill device includes a vertical shaft (2, 9, 30), vertical blades (3, 11, 22) that are connected to the vertical shaft (2, 9, 30) by blade supporting frames (10, 31) so as to rotate around the axis of the vertical shaft (2, 9, 30), and the vertical blades (3, 11, 22) include blade rotation shafts (4, 14, 21) and can rotate around the axis of the blade rotation shafts (4, 14, 21), and a guide device (15, 16, 25) that makes the vertical blades (3, 11, 22) rotate around the axis of the blade rotation shafts (4, 14, 21) while rotating around the axis of the vertical shaft (2, 9, 30). It makes the effective wind receiving area of the vertical blades (3, 11, 22) in tailwind direction greater than that in upwind direction so as to increase the generating efficiency.

Description

Windmill device for vertical axis wind power generation system and method for controlling wind turbine blade

The present invention relates to a windmill device for a vertical axis wind power generation device and a method for controlling a blade of the same, and more particularly to a windmill device for a vertical axis wind power generation system that improves wind power conversion efficiency of a windmill and controls the windmill device The method of the blade. Background technique

For the existing various vertical axis type wind turbines, the biggest problem to be solved is how to effectively reduce the resistance of the windmill blades in the upwind direction and improve the wind energy conversion efficiency of the windmill.

The main solution has been to improve the wind energy conversion efficiency by improving the shape of the windmill blades.

Ben

However, these methods have yet to be further improved in terms of manufacturing costs and large-scale implementation. Therefore, there is a need for a vertical-axis wind power generation system that can effectively increase the efficiency of wind energy conversion, reduce manufacturing costs, and facilitate large-scale operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a windmill apparatus of a vertical axis wind power generation system which is simple in structure, low in cost, and capable of reducing the resistance of a blade during upwind movement.

Another object of the present invention is to provide a blade control method for a wind turbine apparatus of a vertical axis wind power generation system which is simple in structure, low in cost, and capable of reducing the resistance of the blade during upwind movement.

To achieve the above object, the present invention provides a windmill apparatus for a vertical axis wind power generation system, comprising: a vertical main shaft; a vertical vane connected to the vertical main shaft by a vane bracket so as to be rotatable about an axis of the vertical main shaft, The vertical blade includes a blade rotation axis, and the vertical blade is rotatable about an axis of the blade rotation axis; wherein the vertical blade further includes: a guiding device that causes the vertical blade to rotate around the axis of the vertical main axis while also surrounding the blade The axis of the rotation axis rotates such that the effective wind receiving area of the vertical blade when moving in the downwind direction is greater than the effective wind receiving area when moving in the upwind direction.

The windmill device of the above-described vertical axis wind power generation system, wherein the guiding device includes a guiding trajectory member, the guiding trajectory member includes an outer trajectory portion and an inner trajectory portion; the outer trajectory portion and the inner trajectory portion are in a vertical blade against the wind One side of the directional movement intersects at a point, the point is a first position, and from the first position, the distance between the outer trajectory portion and the inner trajectory portion gradually increases, and the other one moves in the downwind direction of the vertical blade At the second position of the side, the distance between the outer track portion and the inner track portion is maximum; from the first position to the second position, the outer track portion is divided into a first outer track and a second outer track, and the inner track portion is divided into a first inner trajectory and a second inner trajectory; and a first portion disposed on the vertical blade to cooperate with the guiding trajectory member a traveling member, in the first rotation period, the first traveling member is movable from the second position to the first position along the outer track, and then moves from the first position to the second position along the second inner track; In the cycle, the first traveling member is movable from the second position to the first position along the first inner trajectory, and then moves from the first position to the second position along the second outer trajectory; the blade self-rotating axis always traverses the vertical main axis A circular motion is made between the portion and the inner track portion such that the surface of the vertical blade is perpendicular to the wind direction when in the second position and parallel to the wind direction when in the first position.

The windmill device of the above-described vertical axis wind power generation system, wherein the guiding device further includes a second traveling member disposed on the vertical blade, the second traveling member being symmetrical with the first traveling member with respect to the blade rotation axis; During a rotation cycle, the second traveling member is movable from the second position to the first position along the first inner trajectory and from the first position to the second position along the second outer trajectory; in the second rotation period, The second travel member is movable from the second position to the first position along the first outer track and from the first position to the second position along the second inner track.

In the wind turbine device of the vertical axis wind power generation system, the guide track member is a guide groove, and the outer track portion and the inner track portion are an outer guide groove and an inner guide groove, respectively; the traveling member is connected by a fixed rod. The first slider and the second slider, the first slider and the second slider serve as a first traveling member and a second traveling member, respectively.

In the wind turbine device of the vertical axis wind power generation system, the guide track member is a track member, and the outer track portion and the inner track portion are an outer track and an inner track, respectively; and the traveling member is connected by a pulley fixing rod. A pulley and a second pulley, the first pulley and the second pulley respectively function as a first traveling member and a second traveling member.

The wind turbine device of the above-described vertical axis wind power generation system further includes a guide track member control device for maintaining the angle between the horizontal line passing through the intersection of the vertical main axis and the outer track and the inner track and the wind direction unchanged The guide track member control device is a wind direction rudder connected to the guide track member by a connecting rod; or an electronic control device for rotating the guide track member.

The present invention also includes a blade control method for a windmill device in a vertical axis wind power generation system, the windmill device including a vertical main shaft; a vertical shaft that is coupled to the vertical main shaft by a vane bracket so as to be rotatable about an axis of the vertical main shaft a blade, the vertical blade comprising a blade rotation axis, the vertical blade being rotatable about an axis of the blade rotation axis; wherein the method comprises guiding the vertical blade with a guiding device such that the vertical blade rotates about an axis of the vertical spindle , also rotating around the axis of the blade rotation axis, so that the effective wind receiving area of the vertical blade when moving in the downwind direction is greater than the effective wind receiving area when moving in the upwind direction.

In the above blade control method, wherein the guiding device includes a guiding trajectory member, the guiding trajectory member includes an outer trajectory portion and an inner trajectory portion; the outer trajectory portion intersects the inner trajectory portion on a side of the vertical blade moving in the upwind direction At one point, the point is the first position, and from the first position, the distance between the outer track portion and the inner track portion is gradually increased, and the second position on the other side of the vertical blade moving in the downwind direction Wherein, the distance between the outer track portion and the inner track portion is maximum; from the first position to the second position, the outer track portion is divided into a first outer track and a second outer track, and the inner track portion is divided into the first inner track and a second inner trajectory; and a first traveling member disposed on the vertical blade to cooperate with the guiding trajectory member, guiding the first traveling member along the first outer trajectory from the second in the guiding first rotation period Moving the position to the first position and moving from the first position to the second position along the second inner trajectory; guiding the first traveling member to move from the second position along the first inner trajectory during the second rotation period of the guiding Moving to the first position and then moving from the first position to the second position along the second outer track; maintaining the blade rotation axis always circularly moves between the outer track portion and the inner track portion around the vertical axis, so that the surface of the vertical blade is at The second position is perpendicular to the wind direction and parallel to the wind direction when in the first position.

The blade control method described above, wherein the guiding device further comprises a second traveling member disposed on the vertical blade, the second traveling member being symmetrical with the first traveling member with respect to the blade rotation axis; at the first rotation period of the guiding The second traveling member is guided to move from the second position to the first position along the first inner trajectory, and then moved from the first position to the second position along the second outer trajectory; in the second rotation period, the guiding The second travel member moves from the second position to the first position along the first outer track and from the first position to the second position along the second inner track.

The above blade control method further includes controlling the orientation of the guiding trajectory such that the angle between the horizontal line passing through the intersection of the vertical main axis and the outer trajectory and the inner trajectory and the wind direction remain unchanged.

According to the technical solution of the present invention, while the blades of the windmill in the vertical-axis wind power generation system revolve around the axis of the vertical main shaft under the driving of the wind, the wind turbine blade direction control device also rotates the wind turbine blade around its own rotation axis to Adjust the angle between the blade and the wind direction. When the blade is moved in the downwind direction, the blade is kept as large as possible for the effective wind receiving area; when the blade is moving in the direction of the wind, the blade is kept as small as possible for the effective wind receiving area. This greatly improves the power generation efficiency of the windmill.

DRAWINGS

1 is a schematic view showing the movement of a windmill blade in a vertical axis type wind power generation system;

Figure 2 is a schematic plan view showing the structure of the guide groove and the connection to the wind rudder;

Fig. 3 is a schematic view showing the structure of a windmill device for controlling the direction of a wind turbine blade using a guide groove; Fig. 4 is a schematic view showing the structure of a windmill device for controlling the direction of a wind turbine blade using a guide rail. detailed description

First, the operation principle of the windmill apparatus of the vertical axis type wind power generation system of the present invention will be briefly explained.

In a vertical-axis wind power generation system, when the blades of the windmill rotate around the axis of the vertical main shaft under the push of the wind (revolution), the wind turbine blades are also rotated about their rotation axes to appropriately adjust the blades and the wind. The angle of the intersection. The method of controlling the angle of intersection of the blade and the wind direction is such that when the wind turbine blade and the rotation axis of the blade move circumferentially around the axis of the vertical main axis of the windmill, a certain point on the blade moves along a specific fixed motion path during the movement. Instead of circular motion around the vertical axis of the windmill. The distance from the axis of the vertical spindle of the windmill to the axis of the rotation axis of the blade is fixed, and the distance from the point to the axis of the rotation axis is also fixed, so that the movement path of the point and the axis of the rotation axis of the blade are fixed. The shape of the path is different, and the angle between the three angles of the triangle formed by the point and the vertical axis of the windmill and the axis of the blade rotation axis is relatively changed when the windmill blade revolves around the vertical axis of the windmill. Since the direction of the line connecting the axis of the blade to the axis of the blade determines the direction of the blade, and the path of the point is appropriately selected, the direction of the blade can be controlled while the windmill blade rotates around the vertical axis of the windmill.

Conversely, if the direction of the blade at each position when revolving around the vertical axis is predetermined, the path of motion at any point on the blade can be calculated. If the point is moved along the calculated path of motion, the blade can be controlled in turn. The direction in motion.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic view showing the movement of a wind turbine blade in a vertical axis type wind power generation system of the present invention. As shown in Fig. 1, the wind turbine blade 3 rotates around the vertical spindle 2 in the counterclockwise direction by the wind force 1, and also rotates around the rotation shaft 4. The path of rotation of the blade rotation axis 4 around the vertical spindle 2 is a circle centered on the axis of the vertical spindle 2, as indicated by the alternate long and short dash line in Fig. 1. The travel point 5 on the blade moves along the motion path 6 as it moves. The distance between the travel point 5 on the blade and the axis of the blade rotation axis 4 is fixed, since the motion path 6 is not a circle centered on the axis of the vertical spindle 2, therefore, the blade is in motion due to the degree of freedom of motion. Restricted, it is forced to change the angle of intersection of the blade with the line of the vertical spindle 2 and the axis of rotation 4, causing the blade 3 to rotate about the axis of the axis of rotation.

Specifically, the motion path 6 includes an outer track portion 61 and an inner track portion 62. The outer trajectory portion 61 intersects the inner trajectory portion 62 at a side where the vertical blade moves in the upwind direction at a point A, and from the first position, the distance between the outer trajectory portion and the inner trajectory portion gradually increases until The point B of the outer track 61 at the second position is at the maximum distance from the point C of the inner track 62. From the first position to the second position, the outer track portion 61 is divided into a first outer track and a second outer track, and the inner track portion 62 is divided into a first inner track and a second inner track.

If the travel point 5 is located at the point B of the outer track portion 61 at the second position, as shown in FIG. 1, the trajectory of the travel point 5 is such that: the first outer track moves from the second position to the first position. (point B to point A), then moving from the first position to the second position along the second inner trajectory (point A to point C); then moving from the second position to the first position along the first inner trajectory (point C) To point A), the second outer track is moved from the first position to the second position (point A to point B). The above-mentioned travel trajectory is the complete cycle of the travel point 5, and the travel point 5 finally returns to the start point B.

When the traveling point 5 travels according to the above trajectory, when the windmill blade 3 moves in the downwind direction, the blade is as perpendicular as possible to the wind direction, and maintains a large effective wind receiving area; when the blade 3 moves in the wind direction, the blade tries to The wind direction is parallel, maintaining a small effective wind receiving area. For example, as shown in FIG. 1, when the traveling point 5 is at the point B of the second position, the surface of the blade 3 is perpendicular to the direction of the wind force 1 so that the effective wind receiving area is maximized; when the traveling point 5 is at the first position (point A) At the time, the surface of the blade 3 is parallel to the direction of the wind 1 so that the effective wind receiving area is minimized.

Since the effective wind receiving area of the wind turbine blade is increased in the downwind direction and the resistance in the upwind direction is reduced, the present invention can more effectively improve the wind energy conversion efficiency of the vertical axis type wind power generation system.

In Fig. 1, when the rotation axis 4 of the windmill blade 3 is rotated 360° around the vertical main shaft 2, the blade 3 is rotated by 180° around the rotation axis 4, that is, the blade 3 revolves twice around the axis of the vertical main axis, and simultaneously After one rotation around the rotation axis, the travel point 5 on the blade is wound from the outer side of the rotation shaft to the inner side of the rotation shaft, and then from the inner side of the rotation shaft to the outer side of the rotation shaft, and the cycle is repeated.

The following is further explained by two specific embodiments.

Fig. 3 is a schematic view showing the structure of a windmill apparatus of a specific embodiment in which the guide groove is used as a guiding means for guiding the direction in which the wind turbine blade rotates around the axis of the rotating shaft, thereby controlling the direction of the wind turbine blade. In Fig. 3, the wind turbine blade 1 1 and the blade rotation shaft 14 are fixedly coupled, and the blade rotation shaft 14 is fixedly coupled to the windmill blade bracket 10, and the blade bracket 10 is fixedly coupled with the vertical main shaft 9 of the wind power generation system and supports the wind turbine blade 1 1. The windmill blade 1 1 and the blade rotation axis 14 are rotatable relative to the blade holder 10 about the axis of the rotation axis. The windmill blade holder 10, together with the vertical spindle 9, is rotatable about the axis of the vertical spindle 9. The wind energy received by the wind turbine blades is transmitted to the power generation system on the vertical main shaft via the rotation shaft 14 and the blade holder 10 by the rotation of the wind turbine blades.

At the lower end of the blade rotation shaft 14, a slider 12 fixedly coupled to the blade rotation shaft 14 is provided. The slider 12 includes a fixing rod 121 extending in the horizontal direction and a sliding rod 122 extending downward at both ends of the fixing rod. The blade rotation axis 14 is located at a midpoint between the two slide bars 122. Similarly, a slider 18 fixedly coupled to the blade rotation shaft 14 is provided at the upper end of the blade rotation shaft 14, and the slider 18 includes a fixing rod 181 extending in the horizontal direction and a slide rod 182 extending downward at both ends of the fixing rod. The blade rotation axis 14 is located at a midpoint between the two sliders 182. The slider 18 at the upper end of the blade rotation shaft 14 and the slider 12 at the lower end are symmetrically disposed.

Below the wind turbine blade 1 1 and above, there is a guide groove 15, 16, the shape of the guide groove, please refer to Figure 2, the trajectory is the same as the movement path 6 shown in Figure 1. Each of the guide grooves 15, 16 includes an inner guide groove corresponding to the outer guide groove and the inner track portion of the outer track portion, respectively. Correspondingly, the outer guiding groove is divided into a first outer groove (corresponding to the first outer track) and a second outer groove (corresponding to the second outer track); the inner guiding groove is divided into the first inner groove (corresponding to the first inner track) And a second inner groove (corresponding to the second inner track). The slide bars 122, 182 are respectively disposed within the guide grooves 15, 16 and are movable within the guide grooves. When the blade 11 and the rotation shaft 14 are rotated about the axis of the vertical main shaft 9, the slide bars 122, 182 are caused to slide in the guide grooves. At the same time, the slide bars 122, 182 drive the fixed rods 121, 181 and the rotation shaft 14 under the action of the guide grooves 15, 16. And the wind turbine blade 11 rotates about the axis of the rotation shaft 14, thereby changing the direction of the wind turbine blade to achieve the purpose of controlling the direction of the wind turbine blade.

The wind turbine blade 1 1 rotates around the vertical main shaft 9 under the action of the wind, and also rotates around the axis of the rotation shaft 14 together with the rotation shaft 14. Figure 1 is a schematic view showing the movement of the windmill blade of Figure 3. The sliders 122, 182 correspond to the traveling members 5 shown in Fig. 1, and their movement trajectories are the same as those of the traveling members 5.

Specifically, taking the slide bar 12 in FIG. 3 as an example, and referring to FIG. 1 and FIG. 2, the slide bar 122 in the outer guide groove is referred to as a first slide bar, and the slide bar 122 in the inner guide groove is referred to as a first Two sliders. In the first rotation period, the first sliding bar 122 is movable from the second position to the first position along the first outer groove, and then moves from the first position to the second position along the second inner track, and the second sliding The rod 122 is movable from the second position to the first position along the first inner trajectory and from the first position to the second position along the second outer trajectory. At this time, the rotation shaft 14 is rotated 360° about the rotation main shaft 9, and the blade 1 1 is turned by 180°. The first slide bar 122 is located in the inner guide groove and the second slide bar 122 is located in the outer guide groove, both of which are just reversed.

In the second rotation cycle, the first sliding bar 122 is movable from the second position to the first position along the first inner groove, and then moves from the first position to the second position along the second outer groove, the second sliding bar The 122 is movable from the second position to the first position along the first outer groove and from the first position to the second position along the second inner groove. At this time, the rotation shaft 14 is again rotated 360° around the rotating main shaft 9, and the blade 1 1 is again rotated by 180°. The first slider 122 returns to the outer guide slot and the second slider 122 returns to the inner guide slot, both of which are again inverted. In this manner, the slider 122 is repeatedly alternately moved in the outer and inner guide grooves, thereby changing the angle of the blade.

In these two cycles, the blade rotation axis 14 always moves circumferentially about the vertical main axis 9 between the outer guide groove and the inner guide groove, so that the surface of the vertical blade is perpendicular to the wind direction when in the second position, and is at the first The position is parallel to the wind direction.

Referring to Fig. 1, it can be seen that since the motion path 6 is not circularly symmetrical, when the wind direction is changed, the orientation of the guide groove that drives the blade 11 together with the rotation axis 14 about the axis of the rotation axis also needs to be adjusted according to the wind direction. . Therefore, it is necessary to guide the control device to adjust the orientation of the guide groove to adjust the orientation of the windmill blade. By using the windward rudder, the guide grooves 15, 16 can be connected to the wind rudder 20, and the orientation of the guide groove can be automatically changed by the wind, so that the intersection of the intersection point A of the outer trajectory portion 61 and the inner trajectory portion 62 with the horizontal axis 2 and the wind direction The angle of the remains remains the same. As shown in Fig. 2, in Fig. 2, the guide grooves 15, 16 are connected to the wind direction rudder 20, and when the wind direction is changed, the wind direction rudder 20 drives the guide grooves 15, 16 to change the orientation under the action of the wind.

Specifically, referring to FIG. 3, the guide groove connecting rod 19 fixedly connects the upper and lower guide grooves 15, 16 and is connected to the windward rudder 20. When the wind direction changes, the windward rudder 20 drives the guide grooves 15, 16 to rotate about the axis of the vertical main shaft and change direction by the wind force, and adjusts the orientation of the guide grooves 15, 16 to an appropriate position. In this embodiment, there are two guide grooves 15, 16, respectively, but one guide groove may be provided only above or below the wind turbine blade 1 1 . The sliders 12 and 18 also each have two sliders 122 and 182, but only one slider is required as the traveling member 5.

The use of the guiding groove structure is relatively simple, the path of the blade is easy to control, and the cost of the device is low.

For large-scale wind power generation systems, it takes more power to change the orientation of the guiding device. In this case, it is more suitable to use an electronic automatic control device, as shown in Fig. 4.

Fig. 4 is a schematic view showing the structure of a windmill apparatus using a guide rail as a guiding means for controlling the direction of the wind turbine blade. Similar to the embodiment shown in Fig. 3, in Fig. 4, the windmill blade 22 is fixedly coupled to the blade rotation shaft 21, and the blade rotation shaft 21 is coupled to the windmill blade bracket 31, and the blade bracket 31 is coupled to the vertical main shaft 30 of the wind power generation system. Support the windmill blades. The windmill blade 22 and the blade rotation shaft 21 are rotatable about the axis of the rotation shaft. The windmill blade bracket 31, together with the blade and the blade rotation axis, is rotatable about the axis of the vertical spindle 30. The wind energy received by the wind turbine blades is transmitted to the power generation system on the vertical main shaft via the rotation shaft 21 and the blade support 31 through the rotation of the wind turbine blades, and the power generation system converts the energy into electric energy.

In the windmill apparatus shown in Fig. 4, the direction of the wind turbine blade 22 is controlled by the pulley fixing rod 23 and the pulley 24 and the rail 25 which are fixedly coupled to the rotation shaft 21. The track 25 is divided into an outer track and an inner track, and the specific path is the same as the moving path 6 shown in Fig. 1, and also coincides with the path of the guiding groove shown in Fig. 2. Under the impetus of the wind, the windmill blades rotate the rotation shaft 21 and the windmill blade bracket 31 about the axis of the vertical main shaft 30, and also move the pulley 24 along the rail 25 through the pulley fixing rod 23. Since the freedom of movement of the pulley 24 is restricted by the rail 25, under the action of the rail, the pulley drives the pulley fixing rod 23 and the windmill blade 22 to rotate around the axis of the blade rotation axis, so that the windmill blade changes direction and controls the wind turbine blade. The role of direction. In the present embodiment, there are two pulleys 24, which are respectively located in the outer rail and the inner rail. The movement mode of the pulley 24 is the same as that of the slider of Fig. 3, and therefore will not be described herein.

The track 25 of Figure 4 is secured to the platform 26 which is supported by the wheeled support transpositions 28, 29. The electronic control unit 27 can drive the wheels of the support unit 28 according to the change of the wind direction, and the automatic control platform 26 rotates about the vertical main shaft 30 to adjust the orientation of the track 25 to be consistent with the wind direction.

In the configuration shown in Fig. 4, part of the weight of the windmill blade can also be supported by the lower rail and the platform. In this way, the material strength of the windmill material, particularly the windmill blade holder, can be greatly reduced. This reduces the cost of the windmill system and also makes it possible to manufacture very large vertical axis wind power generation systems.

With the two embodiments of the present invention, the wind turbine blade direction control device also rotates the windmill blade around its own rotation axis while the blades of the windmill in the vertical axis type wind power generation system revolve around the axis of the vertical main shaft under the push of the wind force. To adjust the angle between the blade and the wind direction. When the blade moves in the downwind direction, the blade is kept as large as possible for the effective wind receiving area; when the blade moves in the direction of the wind, the blade is kept as small as possible for the effective wind receiving area. ' Particular embodiments of the invention may also be replaced in the following manner.

Specifically, the guiding device does not have to be a guiding groove or a guiding track, and may also be a guiding baffle. Further, the guiding device may be a point on a member on the blade or connected to the blade fixedly. Windmill blade direction control structure along a predetermined motion path during motion.

According to the present invention, there is also provided a method of controlling a blade of a windmill device in the above-described vertical axis type wind power generation system. The method includes providing a guiding device for guiding a vertical blade, the guiding device comprising a guiding track member, the guiding track member comprising an outer track portion and an inner track portion; the outer track portion and the inner track portion in a vertical blade upwind direction One side of the motion intersects at a point which is the first position, and from the first position, the distance between the outer track portion and the inner track portion gradually increases, on the other side of the vertical blade moving in the downwind direction The second position, the distance between the outer track portion and the inner track portion is maximum; from the first position to the second position, the outer track portion is divided into a first outer track and a second outer track, and the inner track portion is divided into An inner trajectory and a second inner trajectory; and a first traveling member disposed on the vertical blade to cooperate with the guiding trajectory member.

In the first rotation period of guiding, guiding the first traveling member to move from the second position to the first position along the first outer track, and then moving from the first position to the second position along the second inner track; In the second rotation period of the lead, guiding the first traveling member to move from the second position to the first position along the first inner trajectory, and then moving from the first position to the second position along the second outer trajectory; maintaining the blade rotation axis A circular motion is always applied between the outer track portion and the inner track portion about the vertical main axis such that the surface of the vertical blade is perpendicular to the wind direction when in the second position and parallel to the wind direction when in the first position.

Further, in the control method of the present invention, the method further includes disposing a second traveling member on the vertical blade, the second traveling member being symmetrical with the first traveling member with respect to the blade rotation axis; guiding in the first rotation period of the guiding The second traveling member moves from the second position to the first position along the first inner trajectory, and then moves from the first position to the second position along the second outer trajectory; in the second rotation period, the second traveling member is guided Moving from the second position to the first position along the first outer track and from the first position to the second position along the second inner track.

Further, the control method of the present invention further comprises controlling the orientation of the guiding trajectory such that the angle between the horizontal line passing through the intersection of the vertical main axis and the outer trajectory portion and the inner trajectory portion and the wind direction remains unchanged.

The above description is only the preferred embodiment of the present invention, and the above embodiments are only for explaining the technical solutions of the present invention and not limiting. Any technical solution that can be obtained by a person skilled in the art based on the prior art by logic analysis, reasoning or limited experimentation within the scope of the present invention should be within the scope of the claims of the present invention.

Claims

A windmill device for a vertical axis wind power generation system, comprising:

a vertical spindle; a vertical blade coupled to the vertical spindle by a blade bracket to be rotatable about an axis of the vertical spindle, the vertical blade including a blade rotation axis, the vertical blade being rotatable about an axis of the blade rotation axis; It also includes:

a guiding device, the guiding device rotates the axis of the vertical blade about the axis of the vertical spindle, and also rotates around the axis of the blade rotation axis, so that the effective wind receiving area of the vertical blade when moving in the downwind direction is greater than the direction of the windward direction Effective wind area.

2. The windmill apparatus of a vertical-axis wind power generation system according to claim 1, wherein: the guiding device includes a guiding trajectory member, and the guiding trajectory member includes an outer trajectory portion and an inner trajectory portion; The track portion and the inner track portion intersect at a point on the direction in which the vertical blade moves in the upwind direction, the point being the first position, and the distance between the outer track portion and the inner track portion is gradually increased from the first position a second position on the other side of the vertical blade moving in the downwind direction, the distance between the outer track portion and the inner track portion being the largest; from the first position to the second position, the outer track portion is divided into the first outer track and a second outer track, the inner track portion being divided into a first inner track and a second inner track;

a first traveling member disposed on the vertical blade to cooperate with the guiding track member, wherein the first traveling member is movable from the second position to the first position along the first outer track during the first rotation period, and then The second inner track moves from the first position to the second position; in the second rotation period, the first traveling piece is movable from the second position to the first position along the first inner track, and from the first outer track to the first position Moving the position to the second position; the blade rotation axis always moves circumferentially between the outer track portion and the inner track portion about the vertical axis, so that the surface of the vertical blade is perpendicular to the wind direction when in the second position, and is in the first position when in the first position Parallel to the wind direction.

3. The windmill apparatus of a vertical axis wind power generation system according to claim 2, wherein: the guiding device further comprises a second traveling member disposed on the vertical blade, the second traveling member rotating relative to the blade The shaft is symmetrical with the first traveling member; in the first rotation period, the second traveling member is movable from the second position to the first position along the first inner trajectory, and moves from the first position to the second along the second outer trajectory Position: In the second rotation period, the second traveling member is movable from the second position to the first position along the first outer track and from the first position to the second position along the second inner track.

4. The windmill apparatus of a vertical-axis wind power generation system according to claim 3, wherein: the guide track member is a guide groove, and the outer track portion and the inner track portion are an outer guide groove and an inner guide groove, respectively; The traveling member is a first sliding rod and a second sliding rod connected by a fixing rod, and the first sliding rod and the second sliding rod respectively serve as a first traveling member and a second traveling member.

5. The windmill apparatus of a vertical axis wind power generation system according to claim 3, wherein: the guide track member is a track member, and the outer track portion and the inner track portion are an outer track and an inner track, respectively; The traveling member is a first pulley and a second pulley connected by a pulley fixing rod, and the first pulley and the second pulley respectively function as a first traveling member and a second traveling member.

6. The windmill apparatus of a vertical axis wind power generation system according to claim 2, 3, 4 or 5, further comprising: a guide track member control device for passing the vertical main axis and the outer track portion and the inner The angle between the horizontal line of the intersection of the track portion and the wind direction remains unchanged, the guide track member control device is a wind direction rudder connected to the guide track member by a connecting rod; or for rotating the guide Electronic control device for the track member.

A blade control method for a windmill device in a vertical axis wind power generation system, the windmill device comprising a vertical main shaft; a vertical blade coupled to the vertical main shaft by a blade bracket so as to be rotatable about an axis of the vertical main shaft, The vertical blade includes a blade rotation axis, the vertical blade being rotatable about an axis of the blade rotation axis; wherein the method includes guiding the vertical blade with a guiding device such that the vertical blade rotates about an axis about a vertical spindle At the same time, it also rotates around the axis of the blade rotation axis, so that the effective wind receiving area of the vertical blade when moving in the downwind direction is larger than the effective wind receiving area when moving in the upwind direction.

The blade control method according to claim 7, wherein: the guiding device includes a guiding track member, the guiding track member includes an outer track portion and an inner track portion; the outer track portion and the inner track portion The side moving in the upwind direction of the vertical blade intersects at a point which is the first position, and from the first position, the distance between the outer track portion and the inner track portion gradually increases, in the downwind direction of the vertical blade At a second position on the other side of the motion, the distance between the outer track portion and the inner track portion is maximum; from the first position to the second position, the outer track portion is divided into a first outer track and a second outer track, The trajectory portion is divided into a first inner trajectory and a second inner trajectory; and a first traveling member disposed on the vertical blade to cooperate with the guiding trajectory member,

9. The blade control method according to claim 8, wherein: the guiding device further comprises a second traveling member disposed on the vertical blade, the second traveling member being opposite to the blade rotation axis and the first traveling member Symmetrical; guiding the second traveling member to move from the second position to the first position along the first inner track and then to move from the first position to the second position along the second outer track; In the second rotation period, the second traveling member is guided to move from the second position to the first position along the first outer track, and then moved from the first position to the second position along the second inner track.

10. The blade control method according to claim 8, further comprising: controlling the guide rail The orientation of the track is such that the angle between the horizontal line passing through the intersection of the vertical main axis and the outer track portion and the inner track portion and the wind direction remains unchanged.