CN2462104Y - Rotary wing vane vertical shaft windmill - Google Patents

Abstract

The rotor wheel vertical axis windmill is a windmill that converts wind force into mechanical energy. It includes a base, a central shaft, a rotor wheel, and vertical blades. The feature is that the central axis is vertically installed on the top of the base, and the rotor wheel installed on the central axis and rotated horizontally is composed of a wheel-shaped support frame, a wing shaft, a "sail"-shaped wind wing that can rotate on the shaft, and a limit device that controls the rotation of the wind wing. . Vertical blades with a streamlined cross-section are mounted on the rotor wheel rim. When the speed ratio of the tip of the wind blade is less than 1, the windmill relies on the drag force of the wind blade; when the speed ratio of the tip of the blade of the wind blade is greater than 1, the windmill works by the lift generated by the vertical blades. The wind wing is in the running state with the least resistance against the wind. The windmill is a drag-lift convertible vertical axis windmill.

Description

Rotor Wheel Vertical Axis Windmill

The utility model relates to a windmill which converts wind power into mechanical energy. It is that the central axis of the windmill is vertically arranged on the upper end of the windmill base, and is equipped with a rotor wheel which can rotate with the wind, and is fixedly assembled on the central axis of the windmill. On the rim of the rotor wheel, vertical blades are fixedly installed. Driven by the wind force, while the wind wing is rotating, the rotor wheel rotates horizontally to do work. According to the structure and motion characteristics, it is specially named "rotor wheel vertical axis windmill".

According to relevant windmill design data, the horizontal axis lift windmill that relies on aerodynamic lift to rotate the axial flow impeller, because its power is proportional to the square of the length of the blade on the impeller, etc., in order to obtain greater power, most of them will The blades are very long, and the impellers of this type of windmill are all mounted high on the tower. This not only makes the project of building the windmill huge and expensive, but also makes the installation and maintenance of the main components of the windmill work at high altitudes, thereby increasing the difficulty of building and maintaining the windmill. Although the structure of the low-speed windmill in this type is relatively simple and the blades are easy to manufacture, there are still problems such as large resistance of the impeller to the wind, a large load on the tower, and low working efficiency of the impeller; There are disadvantages such as complex cross-sectional shape of the blade, difficult processing, high requirements for mechanism design and manufacture, and small starting torque. According to windmill design data records, although the Darrieus windmill in the vertical axis lift type windmill has high wind energy conversion efficiency, simple structure, and the advantages of not requiring a very high tower, it has the difficulty of starting the impeller and requires complicated equipment. The control mechanism prevents the disadvantage of impeller stalling. In order to overcome this shortcoming, some Darrieus windmill impellers and Savonius windmill impellers are combined together to use the starting moment generated by the Savonius windmill impeller to solve the starting problem of the windmill, because the Savonius windmill impeller relies on the power output blades and The wind resistance difference on the vanes moving against the wind is used to provide power for the impeller of the resistance type vertical axis windmill, which naturally takes the disadvantages of the Savonius windmill impeller, that is, it brings a huge resistance load that cannot be reduced to the windmill and the support and cannot be effectively used. The problem of regulating the speed of the windmill is brought to the work of Darrieus's windmill, which shows that this combination is far from an ideal combination. Therefore it is necessary to find a kind of shortcoming that can overcome and improve above-mentioned various types of windmills, and the windmill of wind energy conversion efficiency is higher, for people to choose to utilize, and rotor wheel vertical axis windmill provides this possibility for people.

The purpose of the utility model is to provide a resistance-lift convertible rotor wheel vertical axis windmill. It is a new type of wind power machinery with high wind energy conversion efficiency, simple structure, low cost, easy installation and flexible operation.

The utility model is achieved in that it comprises a base, a central shaft, rotor wheels and vertical blades. The feature is that the central axis of the windmill is installed vertically on the top of the base, a horizontally rotatable rotor wheel is installed on the central axis, and vertical blades are fixedly installed on the rim of the rotor wheel.

The horizontally rotatable rotor wheel includes: a wheel-shaped support frame, a wing shaft fixed on the support frame, a sail-shaped wind wing capable of autorotation on the wing shaft, and a limiting device for controlling the self-rotation of the wind wing.

The wheel rim of the rotor wheel is fixedly installed with vertically arranged vertical blades, and the cross section of the blades is streamlined.

The rotor wheel includes one or several wheel-shaped support frames, and the wind blades installed on the horizontal wing shaft on the support frame. Wind wing on the wing shaft.

The sail-shaped wind wing capable of autorotation on the rotor wheel includes a wing bone and a wing width wrapped outside the wing bone. One integral wind wing is installed on the vertical wing shaft; the wind wing installed on the horizontal or inclined wing shaft is composed of several integral wind wings connected in series.

The most prominent advantage of the utility model is that it has higher wind energy conversion efficiency than the existing vertical axis windmill. This is determined by the working characteristics of the windmill structure: because the wind blade on the rotor wheel can rotate automatically and the limit device at the end of the wing shaft can organically regulate the rotation direction and rotation angle of the wind blade, and the wind blade vertically arranged on the rotor The combined effect of the vertical blades on the rim of the wheel, when the windmill is started, the speed ratio of the blade tip of the wind blade (that is, the ratio of the speed of the blade tip of the wind blade to the wind speed) is less than 1, that is, when the windmill relies on the resistance of the wind blade to work, The self-rotation of the wind wing can make the wind wing face the wind with the smallest windward side when running against the wind, so that the wind wing has the least resistance to the wind. The limitation of the rotation direction and angle of the wind blade by the limit device makes the wind blade face the wind with the largest windward side when running in the downwind direction, so that the resistance of the wind blade to the wind is the largest. The resulting large wind resistance difference on both sides of the rotor wheel makes the windmill have a large rotational torque and power output. With the increase of the rotating speed of the rotor wheel, the lift generated by the vertical blades with a streamlined section located at the rim of the rotor wheel will do work, and the lift generated by the vertical blades will do work, and the rotating speed of the rotor wheel will continue to increase. When the speed ratio is greater than 1, the wind blades are equivalent to running against the wind. At this time, the rotation of the wind blades makes all the wind blades face the wind with the smallest windward side, and the wind blades are completely in the running state of the least resistance to the wind, so that the windmill can exert its maximum performance. energy conversion efficiency.

Another outstanding advantage of the utility model is that the rotating speed and power output of the windmill can be effectively regulated. When the blade tip speed ratio of the wind blade is less than 1, the limit device can be adjusted to reduce the windward area of the wind blade running downwind, thereby reducing the power output of the windmill and slowing down the speed of the windmill. When the speed ratio of the blade tip of the wind blade is greater than 1, the regulating and limiting device forces the wind blade to face the wind with a large windward side, and the braking effect played by the wind blade can decelerate the windmill. Regulating and regulating the limit device releases the rotation restriction to all wind wings, and then the wind wings all flutter with the wind, so that the wind resistance difference on both sides of the rotor wheel tends to zero, and the windmill stops or is difficult to start. This function of the utility model can effectively avoid strong wind from causing damage to the windmill and facilitate parking, overhaul and maintenance of the windmill.

The structure of the utility model is simple so that it is easy to process and manufacture. Due to the high wind energy conversion efficiency, when the same kinetic energy is obtained under the same operating conditions as other types of windmills, the wind blades of the windmill of the utility model can be reduced, and the total height can be reduced, thereby reducing the manufacturing cost. Ease of installation and maintenance.

The details of the utility model are provided by the following examples and drawings thereof:

Fig. 1 is the first embodiment of the utility model: the overall schematic diagram of the rotor wheel vertical axis windmill with wind wings installed on the horizontal wing shaft.

Fig. 2 is the second embodiment of the utility model: the overall schematic diagram of the rotor wheel vertical axis windmill with wind wings installed on the vertical wing shaft.

Fig. 3 is a schematic diagram of the structure and shape of the overall wind wing of the present invention.

Figure 4 is an enlarged schematic diagram of the direction B of Figure 3

Figure 5 is an enlarged schematic view of part A of Figure 3

Fig. 6 is a schematic view of the running state of the wind blade on the vertical wing shaft looking down on the second embodiment of the utility model when it is completely relying on the lift of the vertical blade to work.

Fig. 7 is a schematic diagram of the running state of the wind blade on the horizontal blade shaft looking down on the first embodiment of the utility model when it is completely relying on the lift of the vertical blade to work.

Fig. 8 is a schematic diagram of the side profile of the limit plate and the spur gear fixedly installed on the limit plate in the limit device of the present invention.

Fig. 9 is a schematic diagram of the distribution of the convex and concave platforms on the front of the limiting disc in the limiting device of the present invention.

Fig. 10 shows the position of the center line of symmetry of the boss on the limit plate in the limit device of the present invention is parallel to the rotation direction line of the rotor wheel and the boss is located in the direction indicated by the arrow of the rotation direction line, when it abuts against the limit plate Schematic diagram of the limited range of movement of the bump on the wing bone.

Fig. 11 is a schematic diagram of the restricted movement range of the bump on the wing bone abutting against the limit disc when the symmetrical centerline of the boss on the limit disc in the limit device of the present invention is perpendicular to the rotation direction line of the rotor wheel .

According to accompanying drawing 1, namely the utility model embodiment one, the vertical axis windmill of the rotor wheel that wind wing is installed on the horizontal wing axis comprises: base 1 and the central axis 2 that is vertically installed on the top of the base, the fixed installation on the central axis can be horizontal Rotating rotor wheel, and the cross section that is fixedly installed on rotor wheel rim is streamlined vertical blade 4, and rotor wheel comprises wheel-shaped support frame 3, wing shaft 6 and the rotatable blade that is movable around the shaft that is installed on the shaft. Sail-shaped wind wing 5, a limiting device 7 for controlling the rotation of the wind wing.

Each sail-shaped wind wing 5 is formed by connecting several integral wind wings in series. According to accompanying drawing 3, each integral wind wing all comprises wing bone 8 and the wing width 9 that wraps outside the wing bone. The large surface of the wind wing is trapezoidal, and the small end faces on both sides of the wind wing are all streamlined. According to accompanying drawing 4, on the wing bone 8 of the streamlined small end face on one side of the wind wing, there is a fan-shaped groove 10, the groove The included angle between the symmetrical central line of the fan-shaped surface of 10 and the symmetrical central line of the streamlined end face is 80°. According to accompanying drawing 5, there is a fan-shaped projection 11 on the wing bone 8 of the streamlined small end face on the other side of the wind wing, and the symmetrical centerline of the fan-shaped surface of the bump 11 is the symmetrical centerline of the streamlined end face. When the airfoils are connected in series, the protrusion on the airfoil bone away from the center of the rotor wheel is inserted into the groove on the adjacent airfoil bone. The limit device 7 located at the end of the wing shaft is composed of a limit plate 12 and a transmission mechanism for controlling the rotation angle of the limit plate. The limit plate 12 is movably sleeved on the wing shaft 6, the front side is connected with the wind wing 5, and the back side is fixedly equipped with a spur gear 13 (or bevel gear). According to accompanying drawing 5 and accompanying drawing 8 accompanying drawing 9, the front face of the limiting disc 12 connected with the air wing is a step formed by a fan-shaped boss 14 occupying 160° of the limiting disc surface and a fan-shaped concave surface 15 occupying 200° of the limiting disc surface noodle. The protrusion 11 on the wind wing bone 8 connected with the limiting disk 12 is inserted into the gap formed by the concave surface 15 on the stepped surface of the limiting disk 12 . The back side of the limiting disc 12 is fixedly installed with the spur gear 13 (or the bevel gear), and the spur gear 13 (or the bevel gear) is connected with other components of the transmission device controlling the rotational angle of the limiting disc 12 . The control of the rotation angle of the wind blade 5 by the limiting device 7 is to drive the limiting disc 12 through the transmission device in the limiting device 7, so that the limiting disc 12 rotates on the wing shaft 6, and the protrusion on the stepped surface of the limiting disc 12 Changes in the position of the platform 14 result in a change in the range of motion of the bump 11 on the wind blade bone 8 in the gap formed by the concave surface 15 on the limit plate 12 .

During the control process of the rotation angle of the "sail" shaped wind wing 5 connected in series on the horizontal wing shaft by the limit device 7 on the rotor wheel, the operating state of the wind wing 5 and the working characteristics of the utility model formed thereby are as follows :

According to accompanying drawing 1, accompanying drawing 10, when the center line of symmetry of the stepped surface of the limit disc 12 is parallel to the line U of the rotor wheel rotation direction, and the boss 14 on the limit disc as shown in the shadow in the figure is located at the position where the rotor wheel rotates When the direction line U arrow points to the direction, the bump 11 on the wing bone, that is, the fan-shaped surface surrounded by the double-dot dash line in the figure, the range of motion is the rear side 180 of the rotor wheel rotation direction line U arrow pointing. °, the following three situations can occur in the operating state of the wind wing 5 at this time: the first situation is that, according to accompanying drawing 1, when the wind direction is shown by the direction line V, the rotor wheel rotates as shown by the direction line U , when the blade tip speed ratio of the integral wind wing closest to the rotor wheel rim is less than 1, then the wind wing 5 is running against the wind, and each integral wind wing is facing the wind with the smallest windward side; the wind wing 5 is running in the downwind, Each integral wind wing faces the wind with the largest windward side. At this time, the windmill relies on the resistance difference of the wind blades to the wind to work. The second kind of situation is, according to accompanying drawing 7, when windmill relies on the lift that vertical blade 4 produces to work completely, rotor wheel rotates by the direction shown in direction line U, the blade tip velocity ratio of all integral wind blades in wind wing 5 When both are greater than 1, the wind wings 5 all run against the wind with the smallest windward side, presenting the running state with the smallest resistance to the wind. The third situation is that when the rotor wheel rotates, the blade tip velocity ratio of each integral wind blade on the wing shaft 6 is different, that is, its value is from the wind blade near the rotor wheel rim position to the near rotor wheel center position. The wind wings decrease successively. So when the windmill works by relying entirely on the resistance difference of the wind wings 5 to the wind, it will work on the lift generated by the vertical blades 4; During the conversion process of the wind resistance difference, the blade tip velocity ratio of the overall wind wing at different positions on the wing shaft 6 changes from small to large from close to the rotor wheel rim to close to the center of the rotor wheel; or by From the position close to the center of the rotor wheel to the position close to the rim of the rotor wheel, from large to small in turn, there is a gradual change process. In this work performance conversion process, for the overall wind wing with the tip speed ratio greater than 1, no matter whether it is running with the wind or against the wind, it will face the wind with the smallest windward side; while the overall wind wing with the tip speed ratio less than 1 will run against the wind. Face the wind with the smallest windward side in the middle, and do work with the largest windward face in the downwind operation. When the utility model is in operation, the wind blades present the above three operating states during operation, which is the main reason for the windmill to have a prominent feature of large wind energy conversion efficiency, and the speed of the windmill changes smoothly during operation, without A sudden stall will occur.

According to accompanying drawing 1, accompanying drawing 10, accompanying drawing 11, when the limiting disk 12 rotates clockwise, the position of the boss 14 on the limiting disk is indicated by the U arrow in the direction of rotation of the rotor wheel shown in accompanying drawing 10 direction, when the boss 14 moves directly above the wing shaft 6 as shown in Figure 11, below the horizontal centerline of the wing shaft 6, the limit position of the movement of the bump 11 on the wind wing bone 8 also changes accordingly The centerline of symmetry of the bump 11 is transferred from the vertical centerline of the wing shaft 6 as shown in the accompanying drawing 10 to the horizontal centerline of the wing shaft 6 as shown in the accompanying drawing 11, in this position transfer process Among them, when the windmill relies on the resistance difference of the windblade to the wind to work, and the windblade 5 runs along the wind, it transitions from facing the wind with the maximum windward side to facing the wind with the minimum windward side, thereby reducing the power output of the windmill and the speed of the windmill. According to accompanying drawing 11, when the boss 14 of the limit disc is located directly above the wing shaft 6, the movement range of the protrusion 11 of the wing bone is within 180° below the horizontal centerline of the wing shaft 6. At this time, the limit plate releases the effective control of the wind wing 5, and the wind wing 5 can swing with the wind, so that the wind resistance difference on both sides of the rotor wheel approaches zero. Windmill stalls or is difficult to start.

According to accompanying drawing 7, accompanying drawing 11, when the rotor wheel rotates according to the direction shown by the direction line U in accompanying drawing 7, and when the wind blade is in the running state shown in accompanying drawing 7, turn the limit plate 12, make the protrusion on the limit plate The platform 14 moves downwards directly above the wing shaft 6 as shown in Figure 11, and pushes the bump 11 on the bone of the wind wing, so that the position of the bump 11 moves downward, and the area of the wind wing increases when it runs against the wind , thereby increasing the windward resistance of the wind blades and inhibiting the rotation of the windmill. As mentioned above, when the utility model is in operation, the limit device 7 organically regulates the rotation angle of the wind blade 5, so that the windmill has the characteristics of effectively regulating the speed and power output.

The rotation of the limit disc is due to the drive of the transmission mechanism connected to the gear 13 at the back of the limit disc 12 . This transmission mechanism can be a known simple mechanical transmission mechanism; it can also be a known electric transmission mechanism, which can drive the limit plate to rotate 180°. Because on the one hand, this transmission mechanism can select the existing transmission mode to carry out independent design when the windmill is manufactured; Delete this part of the transmission mechanism. The limiting device 7 indicated in the figure is the position where the spur gear 13 behind the limiting plate 12 and the plate is shown.

In addition, in order to avoid the increase of the manufacturing cost of the windmill due to the manufacture of the aforementioned limiting device, other limiting devices with a simple structure may be used instead of the aforementioned limiting device. For example, on the rotor wheel support frame 3, close to the end face position of each wind blade 5, a drawable blocking rod is set, and when the blocking rod is drawn out, it blocks the protrusion 11 on the blade bone of the wind blade, and the rotation of the wind blade 5 The angle is limited on one side of the vertical center line of the wing shaft 6; the restriction on the rotation angle of the wind wing 5 is released by pulling the bar. With this simple mechanism, the utility model still has the above-mentioned other features except that it no longer possesses the function of effectively regulating the windward area of the wind wing to control the speed of the windmill.

According to the accompanying drawing 2, the second embodiment of the utility model, the rotor wheel vertical axis windmill on which the wind wing is installed on the vertical wing shaft includes: a base 1 and a central shaft 2 vertically installed on the top of the base, and the fixed installation on the central shaft can be horizontal Rotating rotor wheel, and vertical blades 4 fixedly mounted on the rim of the rotor wheel. The rotor wheel includes two wheel-shaped support frames 3, a wing shaft 6 installed between the two wheel-shaped support frames and a "sail"-shaped integral wind wing 5 that is movably installed on the wing shaft 6 and can rotate around the axis, and the control wind wing Rotary limiter 7.

The large surface of each sail-shaped wind wing 5 is a rectangle. Its structure is basically the same as that of a trapezoidal wind wing, that is, according to accompanying drawing 3, each wind wing includes a wing bone 8 and a wing width 9 wrapped outside the wing bone. According to accompanying drawing 5, there is a fan-shaped projection 11 on the wing bone 8 on the lower streamlined small end surface of the wind wing 5, and no groove is provided on the wing bone end surface on the upper side of the wind wing.

The limit device 7 located at the lower end of the wing shaft 6 is also composed of a limit plate 12 and a transmission mechanism for controlling the rotation angle of the limit plate 12 . The limit plate 12 is movably sleeved on the lower end of the wing shaft 6, the front side is connected with the wind wing 5, and the back side is fixedly equipped with a spur gear 13 (or bevel gear). Its structural shape is the same as that described in the previous example. When the wind wing 5 is connected to the limiting disk 12, the protrusion 11 on the wing bone 8 of the wind wing 5 is inserted into the gap formed by the concave surface 15 on the stepped surface of the limiting disk 12. The spur gear 13 (or bevel gear) on the back side of the limit disc 12 is connected with other components of the transmission device that controls the rotation angle of the limit disc 12 . The control mode and mechanism of the limit device 7 on the rotation angle of the wind blade 5 are the same as those in Embodiment 1 of the present invention.

During the control process of the rotation angle of the "sail" shaped wind wing 5 on the vertical wing shaft by the limit device 7 on the rotor wheel, the operating state of the wind wing 5 is as follows:

According to accompanying drawing 2, accompanying drawing 10, when the symmetric centerline of the step surface of the limiting disk is on the horizontal centerline of the wing shaft 6, the boss 14 on the surface of the limiting disk as shown in the shadow in the accompanying drawing 10 is located on the rotor wheel When the direction indicated by the arrow of the rotation direction line U, the bump 11 on the wing bone shown in the fan shape surrounded by the double dotted line in the figure, the range of motion is the rear side of the direction indicated by the arrow of the rotation direction line U of the rotor wheel between 180°. At this time, the following two situations can occur in the operating state of the wind wing 5: the first situation is that, according to accompanying drawing 2, when the wind direction is shown in the direction line V in the figure, the rotor wheel rotates in the direction shown in the direction line U, and the wind wing When the blade tip velocity ratio of 5 is less than 1, the wind wing 5 faces the wind with the smallest windward side in the upwind operation; the wind wing 5 faces the wind with the largest windward side in the downwind operation. The second situation is that, according to accompanying drawing 6, when the windmill relies entirely on the lift generated by the vertical blades 4 to work, the rotor wheel rotates in the direction shown by the direction line U. The wing 5 runs against the wind with the smallest windward side, presenting the running state with the least resistance to the wind. According to accompanying drawing 11, when the centerline of symmetry of the boss 14 on the limiting disk is perpendicular to the line of rotation U of the rotor wheel, and the boss 14 is located between the wing shaft 6 and the rim of the rotor wheel, the limiting disk 12 is released. In order to effectively control the wind wing 5, the wind wing 5 can flutter with the wind, so that the wind resistance difference on both sides of the rotor wheel approaches zero. As mentioned above, when the windmill is working, turning the limit plate 12 can also adjust the windward area of the wind wing 5, and achieve the effect of changing the output power of the windmill and the speed of the windmill.

The rotation of the limit disc 12 is also driven by a transmission mechanism connected to the gear 13 at the back of the limit disc 12 . This transmission mechanism is deleted in accompanying drawing 2.

In the embodiment of the present utility model, a pullable retaining rod can also be used to replace the above-mentioned limiting mechanism, so that the present utility model no longer has the functions of effectively regulating the windward area of the wind wing 5, adjusting the output power of the windmill and the rotating speed of the windmill. Function, still possess other various characteristics of the present utility model as mentioned above.

The utility model preliminarily finds that the expected running state can be realized and the expected function can be achieved through the simulated test carried out by the manufactured model.

The utility model can select different structural modes according to different workplaces and different power requirements, and make products of various specifications with different wheel diameters and different numbers of rotor wheels. If the vertical blade 4 on the utility model is removed, then this windmill is also a resistance type windmill with good working performance.

The large one of the utility model can be used as a power device for wind mills and wind-powered irrigation stations; the small one can be made into a booster for vehicles and ships, and a portable emergency power device for field investigation; the miniature one can also be made into a wind-driven plastic toy, especially suitable for for wind power plants of all sizes. For the wind power station that has already been built and adopts the windmill field generating electricity of the axial-flow impeller horizontal shaft lift type windmill, the utility model is adopted to develop and utilize the wind energy in the low-altitude space of the windmill field, and the actual effect of getting twice the result with half the effort can be received. The utility model can provide convenient conditions for building small-scale wind power generation devices for residents living in islands where power transmission is difficult, remote mountainous areas and desert grassland areas with rich wind resources, and frontier checkpoints.

The product has simple structure, easy material acquisition, simple processing, low manufacturing cost, excellent working performance and wide application range. Therefore the utility model is a kind of product with wide production prospect.

Claims (7)

1. A rotor wheel vertical axis windmill comprises a base, a central shaft, a rotor wheel and vertical blades. The feature is that the central axis of the windmill is vertically installed on the top of the base, a horizontally rotatable rotor wheel is fixedly installed on the central axis, and vertical blades are fixedly installed on the rim of the rotor wheel. 2. According to the described windmill of claim 1, it is characterized in that said horizontally rotatable rotor wheel comprises: a wheel-shaped support frame, a wing shaft fixed on the support frame and a "sail" shaped wind wing capable of autorotation on the wing shaft and a control Limiting device for wind wing rotation. 3. According to claim 1, the windmill is characterized in that the vertical blades are fixedly installed at the rim of the rotor wheel, and the cross-section of the blades is streamlined. 4. According to claim 2, the windmill is characterized in that said rotor wheel comprises one or more wheel-shaped support frames, and the wind blades installed on the horizontal wing shafts on the corresponding support frames. 5. According to claim 2, the windmill is characterized in that said rotor wheel has at least two wheel-shaped support frames, and wind wings installed on vertical or inclined wing shafts between the support frames. 6. According to the windmill described in right 2, it is characterized in that the said "sail"-shaped wind wing capable of self-rotation includes a wing bone and a wing width wrapped outside the wing bone, and the wind wing on each wing shaft is an integral wind wing Or several integral wind wings are connected in series. 7. According to claim 2, the windmill is characterized in that the limiting device for controlling the self-rotation of the wind blade includes a limiting plate or a rod and a transmission mechanism connected thereto.

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