Sail device and wind generating set

Abstract

The utility model belongs to the technical field of wind power generation equipment, and provides a sail device and a wind generating set, the sail device comprises a sail and a sail deflection device, and the sail deflection device comprises a plurality of deflection rods, a plurality of first traction cables and a winding and unwinding mechanism; the deflection rods are in one-to-one correspondence with the first supporting rods and extend in the transverse direction, one ends of the deflection rods are hinged to the first supporting rods, hinge points are located between the mast and the first ends of the first supporting rods, and the length of the deflection rods is larger than the distance between the hinge points and the first ends of the first supporting rods; one end of the first traction cable is connected with the other end of the deflection rod; the retracting and releasing mechanism is arranged on the adjacent mast and used for retracting or releasing the other end of the first traction cable. According to the utility model, the production and maintenance cost can be reduced under the condition that a larger maximum deflection angle is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation equipment, and particularly relates to a sail device and a wind turbine generator set. Background Art

[0002] In a sail-type wind turbine generator set, a sail device is used to convert wind energy into mechanical energy to drive a generator to rotate, so as to achieve the purpose of power generation.

[0003] The invention patent with the publication number of CN117489532A discloses a sail-configuration wind turbine. This invention patent is a patent previously applied by the inventor of this application. In this patent, the number of sails is 4, 6 or 8, and the deflection of the sails is realized through a sail deflection assembly. The sail deflection assembly includes a sail deflection drum, a sail deflection motor and a first sail deflection cable. The first sail deflection cable includes a main first cable and a secondary first cable, and both the main first cable and the secondary first cable act on one end of the sail.

[0004] From the perspective of reducing production, maintenance and installation costs, it is more reasonable to design the number of sails as 3. However, if the structure of the sail deflection assembly in the above patent is still adopted, new technical problems will occur, that is: the maximum deflection angle between the sail and the boom will decrease. The decrease in the deflection angle will cause one side of the sail to not effectively face the wind and vibrate greatly, affecting the stable operation of the fan. To solve this problem, although the length of the first cable can be controlled by the sail deflection drum and the sail deflection motor, a set of automatic control system for the length of the first cable needs to be added to control the length of the first cable in real time, which will increase the cost and run counter to the original intention of reducing costs. Summary of the Utility Model

[0005] Aiming at the defects in the prior art, the purpose of the present utility model is to provide a sail device and a wind turbine generator set to solve or at least alleviate one or more of the above technical problems or other problems existing in the prior art.

[0006] In a first aspect, the present utility model provides a sail device, including: a connecting arm arranged horizontally, with one end connected to a hub; a mast arranged vertically, with the lower end connected to the other end of the connecting arm; a sail arranged on the mast and movable along the circumferential direction of the mast; and a sail deflection device for changing the deflection angle of the sail.

[0007] The sail includes: a sail body; a plurality of first support rods, which are arranged at intervals along the longitudinal direction on the sail body and extend along the transverse direction, having opposite first ends and second ends; a second support rod, which is arranged on the sail body and above the plurality of first support rods, and extends along the transverse direction or obliquely; and a plurality of guide rings, one of which is respectively arranged on each of the first support rods and the second support rod, sleeved outside the mast, and the distance between the guide ring and the first end of the first support rod is greater than the distance between the second end.

[0008] The sail deflection device includes: a plurality of deflection rods, which are arranged in one-to-one correspondence with the first support rods, extend along the transverse direction, one end of which is hinged to the first support rod, and the hinge point is located between the mast and the first end of the first support rod, and the length of the deflection rod is greater than the distance between the hinge point and the first end of the first support rod; a plurality of first traction cables, which are arranged in one-to-one correspondence with the deflection rods, and one end of which is connected to the other end of the deflection rod; and a retracting and releasing mechanism, which is arranged on the adjacent masts and is used for retracting or releasing the other end of the first traction cable.

[0009] Further, the sail deflection device further includes a plurality of second traction cables, which are arranged in one-to-one correspondence with the deflection rods, one end of the second traction cable is connected to the other end of the deflection rod, and the other end is connected to the first support rod or the second support rod located above the deflection rod.

[0010] Further, the other ends of the plurality of first traction cables are connected together.

[0011] Further, the retracting and releasing mechanism includes a telescopic rod arranged on the mast.

[0012] Further, the retracting and releasing mechanism includes a retracting and releasing motor and a drum, the drum is driven by the retracting and releasing motor, and the drum is connected to the other end of the first traction cable.

[0013] In a second aspect, the present invention provides a wind power generation set, which includes 3 sail devices as described in any one of the above.

[0014] The beneficial effects of the present invention: The sail device and the wind power generation set provided by the present invention, by installing the deflection rod, ensure that when having a large maximum deflection angle, it is not necessary to control the length of the first traction cable in real time, that is, when the maximum deflection angle is determined, during each rotation, it is not necessary to adjust the length of the first traction cable anymore, so the production and maintenance costs are low. In addition, even if the retracting and releasing mechanism in the sail deflection device fails and cannot work, at most it affects the adjustment of the maximum deflection angle of the sail, but does not affect the operation of the wind power generation set. Therefore, the reliability is improved. Description of the Drawings

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 A perspective view of a wind turbine generator provided by an embodiment of the present invention;

[0017] Figure 2 For Figure 1 the enlarged view of part A in Figure 2 in Figure 1 part of the structure in

[0018] Figure 3 For Figure 1 the enlarged view of part of the structure of

[0019] Figure 4 A schematic structural view of an embodiment of a retracting and deploying mechanism in a wind turbine generator provided by an embodiment of the present invention;

[0020] Figure 5 A working principle diagram of a wind turbine generator in the prior art in a working state;

[0021] Figure 6 An embodiment of the present invention provides a working principle diagram of a wind turbine generator in a working state;

[0022] Figure 7 For Figure 5 the working principle diagram of the wind turbine generator in

[0023] Reference numerals:

[0024] 10, tower barrel;

[0025] 20, hub;

[0026] 31, connecting arm; 32, mast; 33, sail; 331, sail body; 332, first support rod; 333, second support rod; 334, guide ring; 34, sail deflection device; 341, deflection rod; 342, first towing cable; 343, second towing cable; 3441, telescopic rod; 3442, retracting and deploying motor; 3443, reel. Specific embodiments

[0027] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0028] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present utility model belongs.

[0029] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0030] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0033] Such asFigures 1-4 As shown, this embodiment provides a wind turbine generator, including a tower barrel 10, a hub 20 and a sail device. The hub 20 is installed at the top of the tower barrel 10. The hub 20 is rotatably connected to the tower barrel 10, and three sail devices are evenly arranged circumferentially around the hub 20.

[0034] Among them, the sail device includes a connecting arm 31, a mast 32, a sail and a sail deflection device 34. The connecting arm 31 is arranged horizontally, and one end is fixedly connected to the hub 20. The mast 32 is arranged longitudinally, and the lower end is fixedly connected to the other end of the connecting arm 31.

[0035] The sail is arranged on the mast 32 and can move circumferentially along the mast 32. In addition, the sail can also move along the extending direction of the mast 32. The sail includes a sail body 331, a first support rod 332, a second support rod 333 and a guide ring 334. The material of the sail body 331 can be high molecular fiber materials such as nylon, polyester, carbon fiber, aramid, etc. The sail body 331 can be made of a whole piece of fabric or spliced by multiple pieces of fabric. The shape of the sail body 331 can be regular or irregular. The regular shape can be a rectangle, and the irregular shape can be evolved from a rectangle. For example, one side of the rectangle is changed into multiple sides. Multiple first support rods 332 are arranged. The multiple first support rods 332 are fixedly arranged at intervals longitudinally on the sail body 331, and each first support rod 332 extends transversely. The first support rod 332 has opposite first and second ends. The length of the first support rod 332 is the same as the width of the sail body 331. Therefore, if the shape of the sail body 331 is irregular, the lengths of the multiple first support rods 332 can be different due to different installation heights. Of course, if the shape of the sail body 331 is a regular rectangle, the lengths of the multiple first support rods 332 are the same. The second support rod 333 is also fixedly arranged on the sail body 331. The second support rod 333 is located above the multiple first support rods 332, that is, the second support rod 333 is arranged at the top of the sail body 331. The second support rod 333 extends transversely or obliquely. According to the different shapes of the top of the sail body 331, the extending direction of the second support rod 333 is also different. Multiple guide rings 334 are arranged. One guide ring 334 is respectively arranged on each first support rod 332 and the second support rod 333. The multiple guide rings 334 are sleeved outside the mast 32 at intervals longitudinally. The distance between the guide ring 334 and the above-mentioned first end of the first support rod 332 is greater than the distance from the guide ring 334 to the above-mentioned second end of the first support rod 332. Therefore, the sail body 331 is eccentrically arranged relative to the mast 32, which is convenient for the sail body 331 to rotate around the mast 32 within a certain range under the blowing of the wind. The second support rod 333 also has opposite first and second ends. The distance between the guide ring 334 and the above-mentioned first end of the second support rod 333 can be greater than, equal to or less than the distance from the guide ring 334 to the above-mentioned second end of the second support rod 333, which is specifically determined according to the shape of the top of the sail body 331. The guide ring 334 guides the rotation of the sail body 331 around the mast 32. At the same time, it can also guide the lifting movement of the sail body 331 along the height direction of the mast 32.

[0036] The sail deflection device 34 includes a deflection rod 341, a first towing cable 342, and a retracting and releasing mechanism. The deflection rods 341 are provided in one-to-one correspondence with the first support rods 332. Therefore, there are multiple deflection rods 341. The deflection rods 341 extend transversely, and one end of each deflection rod 341 is hinged to the first support rod 332. Therefore, the deflection rods 341 swing in the horizontal plane. The hinge point between the deflection rod 341 and the first support rod 332 is located between the mast 32 and the first end of the first support rod 332. The length of the deflection rod 341 is greater than the distance between the hinge point and the first end of the first support rod 332. Therefore, when the deflection rod 341 rotates to a position parallel or substantially parallel to the first support rod 332, the other end of the deflection rod 341 is located outside the first end of the first support rod 332 and also outside the sail body 331. The first towing cables 342 are provided in one-to-one correspondence with the deflection rods 341. Therefore, there are multiple first towing cables 342. One end of each first towing cable 342 is connected to the other end of the corresponding deflection rod 341, and the other end is retracted or released by the retracting and releasing mechanism provided at the upper end of the mast 32. It should be noted that the retracting and releasing mechanism is provided on the adjacent mast 32, specifically on the mast 32 of another adjacent sail device, so that the retracting and releasing mechanism can retract or release the first towing cable 342.

[0037] Figure 5 shows the working principle diagram of a wind turbine in the prior art in a working state. In Figure 5 there are 3 sail devices, and one end of the sail is towed by a towing cable. In Figure 5 the lengths of the towing cables a, b, and c are kept the same. The sail a is coplanar with the boom, the deflection angle of the sail a is 0°, the sail b is in the downwind position with a deflection angle of 30°, and the deflection angle of the sail c is 60°. Therefore, Figure 1 the maximum deflection angle of the sail in

[0038] Figure 6 shows the working principle diagram of a wind turbine provided in this embodiment in a working state. In Figure 6 the lengths of the towing cables a, b, and c are kept the same, and the maximum deflection angle of the sail is 100°.

[0039] Figure 7 shows Figure 5 the working principle diagram of the wind turbine in Figure 7 when the maximum deflection angle of the sail is 100°. In

[0040] The sail deflection device 34 of the wind turbine provided in this embodiment ensures that when the maximum deflection angle is relatively large, the length of the first towing cable 342 does not need to be controlled in real time by installing a deflection rod 341. That is, after determining the maximum deflection angle, during each rotation, the length of the first towing cable 342 does not need to be adjusted again, so the production and maintenance costs are low. In addition, even if the retracting and releasing mechanism in the sail deflection device 34 fails and cannot work, at most it affects the adjustment of the maximum deflection angle of the sail, but does not affect the operation of the wind turbine. Therefore, the reliability is improved.

[0041] In one embodiment, as Figure 3 shown, the sail deflection device 34 further includes a plurality of second towing cables 343. The second towing cables 343 are arranged in one-to-one correspondence with the deflection rods 341. The second towing cables 343 are inclined. One end of the second towing cable 343 is connected to the other end of the deflection rod 341, and the other end is connected to the first support rod 332 or the second support rod 333 located above the deflection rod 341. Since the retracting and releasing mechanism is suitable for being installed below the sail, and the retracting and releasing mechanism is used to retract or release the first towing cable 342, the first towing cable 342 generates a downward pulling force on the deflection rod 341. By setting the second towing cable 343, an upward pulling force can be generated on the deflection rod 341, so as to offset the downward pulling force generated by the first towing cable 342 on the deflection rod 341, so that the deflection rod 341 swings in the horizontal plane, avoiding the situation that the deflection rod 341 has a tendency to bend downward only under the pulling of the first towing cable 342.

[0042] In one embodiment, as Figure 3 shown, the other ends of the plurality of first towing cables 342 are connected together. For example, the other first towing cables 342 above the lowermost first towing cable 342 are all connected to the lowermost first towing cable 342, and then the retracting and releasing mechanism directly retracts or releases the lowermost first towing cable 342, so that it is convenient for the retracting and releasing mechanism to retract or release the plurality of first towing cables 342 at the same time.

[0043] In one embodiment, as Figure 3 shown, the retracting and releasing mechanism includes a telescopic rod 3441 arranged on the mast 32. The telescopic rod 3441 can be electric, pneumatic or hydraulic. The telescopic rod 3441 can be fixed on the mast 32, or can be installed on the mast 32 and swing within a certain range. The telescopic rod 3441 can actively expand and contract transversely, so as to change the position of the other end of the first towing cable 342, and further realize the control of the maximum deflection angle of the sail. This embodiment gives a feasible implementation manner of the retracting and releasing mechanism.

[0044] In one embodiment, as Figure 4As shown, the retracting and deploying mechanism may also include a retracting and deploying motor 3442 and a drum 3443. The retracting and deploying motor 3442 is fixed on the mast 32, and the drum 3443 is also installed on the mast 32 and driven by the motor, so that the drum 3443 can rotate around its own axis. The other end of the first towing cable 342 is connected to the drum 3443. This embodiment provides another implementable embodiment of the retracting and deploying mechanism.

[0045] In the description of the present utility model, a large number of specific details are set forth. However, it can be understood that the embodiments of the present utility model may be practiced without these specific details. In some instances, well-known methods, structures and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the specification of the present utility model.

Claims

1. A sail device, characterized in that, Comprising: A connecting arm (31), arranged transversely, with one end connected to the hub (20); A mast (32), arranged longitudinally, with the lower end connected to the other end of the connecting arm (31); A sail, arranged on the mast (32) and movable circumferentially along the mast (32); And A sail deflection device (34) for changing the deflection angle of the sail; The sail comprises: A sail body (331); A plurality of first support rods (332), arranged longitudinally at intervals on the sail body (331) and extending transversely, having opposite first and second ends; A second support rod (333), arranged on the sail body (331) and above the plurality of first support rods (332), extending transversely or obliquely; and A plurality of guide rings (334), with one provided on each of the first support rods (332) and the second support rod (333), sleeved outside the mast (32), and the distance between the guide ring (334) and the first end of the first support rod (332) is greater than the distance between the second end; The sail deflection device (34) comprises: A plurality of deflection rods (341), arranged corresponding to the first support rods (332) one by one, extending transversely, with one end hinged to the first support rod (332), and the hinge point is between the mast (32) and the first end of the first support rod (332), and the length of the deflection rod (341) is greater than the distance between the hinge point and the first end of the first support rod (332); A plurality of first towing cables (342), arranged corresponding to the deflection rods (341) one by one, with one end connected to the other end of the deflection rod (341); and A retracting and releasing mechanism, arranged on the adjacent mast (32), for retracting or releasing the other end of the first towing cable (342).

2. The sail device according to claim 1, wherein The sail deflection device (34) further comprises a plurality of second towing cables (343), the second towing cables (343) are arranged corresponding to the deflection rods (341) one by one, one end of the second towing cable (343) is connected to the other end of the deflection rod (341), and the other end is connected to the first support rod (332) or the second support rod (333) above the deflection rod (341).

3. The sail device according to claim 1, wherein The other ends of the plurality of first towing cables (342) are connected together.

4. The sail device according to claim 1, wherein The retracting and releasing mechanism comprises a telescopic rod (3441) arranged on the mast (32).

5. The sail device according to claim 1, wherein The retracting and releasing mechanism comprises a retracting and releasing motor (3442) and a winding drum (3443), the winding drum (3443) is driven by the retracting and releasing motor (3442), and the winding drum (3443) is connected to the other end of the first towing cable (342).

6. A wind power generation set, comprising 3 sail devices according to any one of claims 1-5.

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