Horizontal shaft type breeze wind turbine

Abstract

The utility model relates to the technical field of wind driven generators, in particular to a horizontal shaft type breeze wind turbine which comprises a support, a rotating shaft, rose-shaped fan blades and lifting force type blades, the rotating shaft is horizontally arranged on the support, the two ends of the rotating shaft are rotationally connected with the support, and each rose-shaped fan blade comprises a shaft sleeve and an arc-shaped fan blade. The arc-shaped fan blades are wound on the shaft sleeve according to the Archimedes spiral line, the lift force type blades are fixed to the rose-shaped fan blades, the downwind rotation directions of the rose-shaped fan blades and the lift force type blades are the same, and the rose-shaped fan blades are resistance type blades, are not high in rotation speed but large in output torque and can be rapidly started under the condition of low wind speed. And a higher blade tip rate ratio can be obtained by being matched with a lift type blade for use. The rose-shaped fan blade is provided with three arc-shaped fan blades, the lift-type fan blade is provided with three sets of supporting rods and wing-shaped fan blades, the supporting rods play a role in supporting and fixing the arc-shaped fan blades, and the wing-shaped fan blades can obtain a higher blade tip rate ratio.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbines, and particularly relates to a horizontal-axis micro-wind turbine. Background Art

[0002] Wind turbines are divided into two types: horizontal-axis and vertical-axis. Among them, horizontal-axis wind turbines can effectively utilize wind energy and improve power generation efficiency, and their power generation efficiency is usually about 10% higher than that of vertical-axis wind turbines.

[0003] The blades of wind turbines are divided into lift-type and drag-type structures. Among them, lift-type blades rely on aerodynamic lift to rotate the blades. There is no limit to the tip speed ratio of lift-type blades. The tip speed ratio of lift-type blades is high, the blade rotation speed is fast, and it can directly rotate coaxially with the motor, which can reduce the loss during the kinetic energy transmission process. The higher the tip speed ratio, the higher the wind energy conversion efficiency of the wind turbine. Due to the action of lift, the circumferential speed of the wind wheel can reach several times or even more than a dozen times the wind speed. Therefore, lift-type blades are mostly used in wind turbines.

[0004] In contrast, drag-type blades rely on the direct blowing pressure of the wind on the blades. Specifically, the pressure on the blades moving with the wind is greater than the wind resistance on the blades against the wind. The pressure difference is used to drive the impeller to rotate and output power. To obtain power output, the tip speed of the blade cannot be much faster than the wind speed, otherwise the blade is equivalent to avoiding the wind. Therefore, drag-type blades are preferably operated under the condition that the tip speed ratio is close to 1. The rotation speed of drag-type blade wind turbines is not high, but the output torque is very large, and it can get rid of the static state faster when starting, realizing rapid startup. Summary of the Utility Model

[0005] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a horizontal-axis micro-wind turbine, which can obtain a higher tip speed ratio under low wind speed conditions.

[0006] To solve the above technical problems, the utility model provides a horizontal-axis micro-wind turbine, comprising: a bracket; a rotating shaft, which is horizontally arranged on the bracket and is rotatably connected to the bracket at both ends; a rose-shaped fan blade, which comprises a shaft sleeve and arc-shaped fan blades, the shaft sleeve is fixedly installed on the rotating shaft, and a plurality of the arc-shaped fan blades are arranged around the shaft sleeve; a lift-type blade, which is fixed on the rose-shaped fan blade, and the rose-shaped fan blade and the lift-type blade have the same downwind rotation direction.

[0007] Preferably, in the above solution, the lift-type blade comprises a plurality of groups of support rods and airfoil blades. One end of each group of support rods is fixedly connected to the shaft sleeve, and the other end penetrates through the arc-shaped fan blade and is connected to the airfoil blade.

[0008] Preferably, in the above solution, the rose-shaped fan blade is provided with three of the arc-shaped fan blades, the lift-type blade is provided with three groups of the support rods and the airfoil blades, and the three groups of support rods are arranged on the shaft sleeve in a circumferential array.

[0009] Preferably, in the above solution, the rose-shaped fan blade is in the shape of being wide at the front end and narrow at the rear end, the arc-shaped fan blade is wound around the shaft sleeve according to an Archimedean spiral, and the lift-type blade is arranged near the front end of the rose-shaped fan blade.

[0010] Preferably, in the above solution, the rotating shaft, the lift-type blade and the rose-shaped fan blade are arranged on the same central axis, and the lift-type blade and the rose-shaped fan blade are arranged inside the bracket.

[0011] Preferably, in the above solution, it further includes a generator, which is arranged on the bracket behind the rose-shaped fan blade, and one end of the rotating shaft is connected to the output end of the generator.

[0012] Preferably, in the above solution, it further includes a speed-limiting safety mechanism, which is arranged on the bracket, and the other end of the rotating shaft is connected to the speed-limiting safety mechanism.

[0013] Preferably, in the above solution, it further includes a rotating structure, which is rotatably arranged horizontally at the bottom of the bracket.

[0014] Preferably, in the above solution, it further includes a steering fin, which is arranged on the bracket behind the rose-shaped fan blade.

[0015] Preferably, in the above solution, it further includes a telescopic structure, which is movably arranged up and down at the bottom of the rotating structure.

[0016] Compared with the existing technology, the utility model has the following beneficial effects:

[0017] 1. A horizontal-axis micro-wind wind turbine in the utility model includes a bracket, a rotating shaft, a rose-shaped fan blade, and a lift-type blade. The rotating shaft is horizontally arranged on the bracket and is rotatably connected to the bracket at both ends. The rose-shaped fan blade includes a shaft sleeve and an arc-shaped fan blade. The shaft sleeve is fixedly installed on the rotating shaft, and multiple arc-shaped fan blades are wound around the shaft sleeve. The lift-type blade is fixed on the rose-shaped fan blade. The rose-shaped fan blade and the lift-type blade have the same downwind rotation direction. The rose-shaped fan blade is a drag-type blade with a low rotational speed but a large output torque, and can be quickly started under low wind speed conditions. By cooperating with the lift-type blade, a higher tip speed ratio can be obtained, and it can be applied to the low-wind-speed wind power generation scenario of rural households.

[0018] 2. The rose-shaped fan blades in the present utility model are arranged in a shape that is wide at the front end and narrow at the rear end. The arc-shaped fan blades are wound around the sleeve according to the Archimedean spiral. The lift-type blades are arranged near the front end of the rose-shaped fan blades. Moreover, the rose-shaped fan blades are provided with three arc-shaped fan blades, and the lift-type blades are provided with three groups of support rods and airfoil blades. The three groups of support rods are arranged on the sleeve in a circumferential array. One end of the support rod is fixedly connected to the sleeve, and the other end penetrates through the arc-shaped fan blade and then is connected to the airfoil blade. The support rod can play a role in supporting and fixing the arc-shaped fan blade, and the airfoil blade can obtain a higher tip speed ratio. The combined structure of the above-mentioned rose-shaped fan blades and lift-type blades has the advantages of good stability, simple structure, convenient disassembly, installation and maintenance.

[0019] 3. The rotating structure in the present utility model is rotatably arranged at the bottom of the bracket in a horizontal direction. The steering tail fin is arranged on the bracket at the lower part behind the rose-shaped fan blade. The rotating structure and the steering tail fin are used in cooperation, so that the front end of the rose-shaped fan blade can be aligned with the incoming wind direction in real time. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a horizontal-axis micro-wind turbine of the present utility model from the first perspective.

[0021] Figure 2 It is a schematic structural diagram of a horizontal-axis micro-wind turbine of the present utility model from the second perspective.

[0022] Figure 3 It is a schematic structural diagram of a horizontal-axis micro-wind turbine of the present utility model from the third perspective.

[0023] Among them, 1 - bracket, 2 - rotating shaft, 3 - rose-shaped fan blade, 31 - sleeve, 32 - arc-shaped fan blade, 4 - lift-type blade, 41 - support rod, 42 - airfoil blade, 5 - generator, 6 - speed limit safety mechanism, 7 - rotating structure, 8 - steering tail fin, 9 - telescopic structure. Specific Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 construed as a limitation to the present utility model.

[0026] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If terms such as "first", "second", "third" are described only for the purpose of description and distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; 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. 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. The following will describe the embodiments according to the overall structure of the present utility model.

[0028] As Figure 1 , Figure 2 and Figure 3 shown, the present utility model discloses a horizontal-axis micro-wind turbine, which includes a bracket 1, a rotating shaft 2, a rose-shaped fan blade 3, and a lift-type blade 4. The rotating shaft 2 is horizontally arranged on the bracket 1 and is rotatably connected to the bracket 1 at both ends. The rose-shaped fan blade 3 includes a shaft sleeve 31 and arc-shaped fan blades 32. The shaft sleeve 31 is fixedly installed on the rotating shaft 2, and multiple arc-shaped fan blades 32 are surrounded around the shaft sleeve 31. The lift-type blade 4 is fixed to the rose-shaped fan blade 3, and the rose-shaped fan blade 3 and the lift-type blade 4 have the same downwind rotation direction. It can be understood that the rose-shaped fan blade 3 in this embodiment is a drag-type blade, with a low rotational speed but a large output torque. It can get rid of the static state faster when starting and can start quickly under low wind speed conditions. By cooperating with the lift-type blade 4, a higher tip speed ratio can be obtained, and it can be applied to the low wind speed wind power generation scenario of rural families.

[0029] In this embodiment, the rose-shaped fan blade 3 is in the shape of being wide at the front end and narrow at the rear end. The arc-shaped fan blade 32 is wound around the shaft sleeve 31 according to the Archimedes spiral. The lift-type blade 4 is arranged near the front end of the rose-shaped fan blade 3. The front end of the rose-shaped fan blade 3 is the air inlet end, and the rear end is the air outlet end. The rotating shaft 2, the lift-type blade 4 and the rose-shaped fan blade 3 are arranged concentrically. The lift-type blade 4 and the rose-shaped fan blade 3 are arranged inside the bracket 1. Specifically, the lift-type blade 4 in this embodiment includes multiple groups of support rods 41 and airfoil blades 42. One end of each group of support rods 41 is fixedly connected to the shaft sleeve 31, and the other end penetrates through the arc-shaped fan blade 32 and then is connected to the airfoil blade 42. The support rod 41 can play a role in supporting and fixing the arc-shaped fan blade 32. The combined structure of the rose-shaped fan blade 3 and the lift-type blade 4 has the advantages of good stability, simple structure, convenient disassembly, installation and maintenance.

[0030] Further, the rose-shaped fan blade 3 is provided with three arc-shaped fan blades 32, and the lift-type blade 4 is provided with three groups of support rods 41 and airfoil blades 42. The three groups of support rods 41 are arranged on the shaft sleeve 31 in a circumferential array. Preferably, the airfoil blade 42 is set in the shape of a low-drag airfoil with camber, which can be better applied to the horizontal axis wind turbine. It should be noted that both the airfoil blade 42 and the arc-shaped fan blade 32 are made of light and strong materials, such as carbon fiber composite materials. This kind of material is both light and has high strength, which helps to reduce the weight and improve the durability of the blade.

[0031] This embodiment also includes a generator 5, which is arranged on the bracket 1 behind the rose-shaped fan blade 3. One end of the rotating shaft 2 is connected to the output end of the generator 5. Specifically, the outer shell of the generator 5 is fixedly installed on the bracket 1, and the output end of the generator 5 is splined to one end of the rotating shaft 2.

[0032] This embodiment also includes a speed limit safety mechanism 6, which is arranged on the bracket 1, and the other end of the rotating shaft 2 is connected to the speed limit safety mechanism 6. The speed limit safety mechanism 6 is a key component to ensure the safe operation of the wind turbine under extreme wind speed conditions. By limiting the rotation speed of the wind turbine, it prevents the blades and the generator from being damaged due to overload under strong wind conditions, thereby protecting the wind turbine from damage.

[0033] This embodiment also includes a rotating structure 7, which is rotatably arranged horizontally at the bottom of the bracket 1; it also includes a yaw tail fin 8, which is arranged on the bracket 1 behind the rose-shaped fan blade 3. Specifically, the yaw tail fin 8 is arranged on the bracket 1 at the lower part behind the rose-shaped fan blade 3, which can avoid the influence of the rose fan blade structure 3 on the yaw tail fin 8. The rotating structure 7 and the yaw tail fin 8 are used in cooperation, so that the front of the rose-shaped fan blade 3 can be aligned with the incoming wind direction in real time. Preferably, the rotating structure 7 includes a turntable and a weighted base. The turntable is rotatably arranged on the weighted base, and the weighted base can further enhance the stability of the overall structure during operation.

[0034] This embodiment further includes a telescopic structure 9, which is movably arranged at the bottom of the rotating structure 7 in the up and down direction. Specifically, the telescopic structure 9 includes a telescopic end and a fixed end. The top of the turntable of the rotating structure 7 is fixedly connected to the bottom of the bracket 1, and the weighted base of the rotating structure 7 is fixedly connected to the telescopic end of the telescopic structure 9. The fixed end of the telescopic structure 9 can be fixedly installed on the ground, roof and load-bearing platform through bolts. The telescopic structure 9 is used to adjust the horizontal height of the bracket 1 so that the rose-shaped fan blades 3 can obtain a more suitable windward height.

[0035] Thus, the functions achieved by a horizontal axis type gentle breeze wind turbine in this embodiment are as follows:

[0036] (1) Low wind speed startup function

[0037] By setting rose-shaped fan blades with drag-type blades, it can start at low wind speeds. Due to the large output torque, it can get rid of the static state faster at the start and drive the rotating shaft and lift-type blades to rotate.

[0038] (2) Support and fixation function

[0039] By setting one end of the support rod fixedly connected to the bushing and the other end penetrating through the arc-shaped fan blade and then connecting to the airfoil blade, the support rod can play a role in supporting and fixing the arc-shaped fan blade, and has the advantages of good stability and simple structure.

[0040] (3) Function of increasing the tip speed ratio

[0041] By setting the rose-shaped fan blade to be wide at the front end and narrow at the rear end, the lift-type blade is arranged near the front end of the rose-shaped fan blade, and the rose-shaped fan blade is provided with three arc-shaped fan blades, and the lift-type blade is provided with three groups of support rods and airfoil blades. The three groups of support rods are arranged on the bushing in a circumferential array. The airfoil blades arranged outside the arc-shaped fan blade can obtain a higher tip speed ratio.

[0042] (4) Real-time wind chasing function

[0043] By arranging the rotating structure rotatably horizontally at the bottom of the bracket, and the yaw vane is arranged on the bracket at the lower part behind the rose-shaped fan blade, the rotating structure and the yaw vane are used in cooperation, so that the front end of the rose-shaped fan blade can be aligned with the incoming wind direction in real time.

[0044] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A horizontal-axis gentle breeze wind turbine, characterized in that, Comprising: A bracket; A rotating shaft, which is horizontally arranged on the bracket and rotatably connected to the bracket at both ends; A rose-shaped fan blade, which includes a bushing and arc-shaped fan blades. The bushing is fixedly installed on the rotating shaft, and multiple arc-shaped fan blades are arranged around the bushing; A lift-type blade, which is fixed to the rose-shaped fan blade, and the rose-shaped fan blade rotates in the same direction as the lift-type blade in the downwind direction.

2. The horizontal-axis micro-wind turbine according to claim 1, wherein The lift-type blade includes multiple groups of support rods and airfoil blades. One end of each group of support rods is fixedly connected to the bushing, and the other end penetrates through the arc-shaped fan blade and is connected to the airfoil blade.

3. The horizontal-axis micro-wind turbine according to claim 2, wherein The rose-shaped fan blade is provided with three arc-shaped fan blades, and the lift-type blade is provided with three groups of support rods and airfoil blades. The three groups of support rods are arranged on the bushing in a circumferential array.

4. A horizontal-axis micro-wind turbine according to claim 1, wherein, The rose-shaped fan blade is in the shape of being wide at the front end and narrow at the rear end. The arc-shaped fan blades are wound around the bushing in accordance with an Archimedean spiral. The lift-type blade is arranged near the front end of the rose-shaped fan blade.

5. The horizontal-axis micro-wind turbine according to claim 4, characterized in that, The rotating shaft, the lift-type blade and the rose-shaped fan blade are arranged on the same central axis. The lift-type blade and the rose-shaped fan blade are arranged inside the bracket.

6. The horizontal-axis micro-wind turbine according to claim 1, wherein It further includes a generator, which is arranged on the bracket behind the rose-shaped fan blade. One end of the rotating shaft is connected to the output end of the generator.

7. The horizontal-axis gentle breeze wind turbine according to claim 6, wherein It further includes a speed-limiting safety mechanism, which is arranged on the bracket. The other end of the rotating shaft is connected to the speed-limiting safety mechanism.

8. A horizontal-axis micro-wind turbine according to claim 1, characterized in that, It further includes a rotating structure, which is horizontally rotatably arranged at the bottom of the bracket.

9. The horizontal axis type gentle breeze wind turbine according to claim 8, wherein It further includes a steering fin, which is arranged on the bracket behind the rose-shaped fan blade.

10. A horizontal-axis micro-wind turbine according to claim 8, characterized in that, It further includes a telescopic structure, which is vertically movably arranged at the bottom of the rotating structure.

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