Wind wheel swing prevention non-supporting structure and vertical axis wind turbine

Abstract

The utility model discloses a kind of wind-preventing wheel swing non-support structure and vertical axis breeze generator, including fan blade, fan blade connecting piece, fan blade middle shaft, connecting pin shaft and top stand column;Fan blade is fixed in the outside of fan blade connecting piece, connecting pin shaft is inserted in fan blade middle shaft pinhole and fan blade connecting piece, top stand column is set in the outside of fan blade middle shaft, the upper end and lower end of top stand column are respectively tightly contacted with one fan blade connecting piece, so that fan blade connecting piece is tightly contacted in upward and downward direction, its position attitude is more stable;Connecting pin shaft only provides connection and supporting effect, and it is not easy to appear loose gap due to shear force effect. Thus, even if fan blade is uneven in size and appears swing, when force is conducted to the upper surface of fan blade connecting piece, fan blade middle shaft can still rotate smoothly, so as to make equipment output stable three-phase voltage.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, specifically to a wind turbine oscillation-resistant unsupported structure, and a vertical axis micro wind generator including such a wind turbine oscillation-resistant unsupported structure. Background Technology

[0002] Wind turbines can be mainly divided into two categories: horizontal axis wind turbines and vertical axis wind turbines. Vertical axis wind turbines are those whose rotor axis is perpendicular to the ground or the mounting plane. Vertical axis wind turbines are characterized by their compact structure, flexibility in adapting to wind direction changes, and low starting wind speed, enabling them to start up even in low winds and achieve power generation in light winds.

[0003] The general working principle of a vertical axis wind turbine is as follows: under the action of airflow, the vertically mounted blades on the generator rotate, which drives the central shaft of the blades to rotate; the central shaft of the blades serves as the power input shaft of the generator, inputting rotational power into the generator, thereby creating conditions for power generation.

[0004] An intermediate connector is needed between the fan blades and the fan blade shaft to transfer the rotation of the fan blades to the fan blade shaft. This intermediate connector can be a wheel structure, which facilitates the even fixing of multiple fan blades on the circumference of the wheel, with the fan blade shaft fixedly connected to the central axis of the wheel. The wheel and the fan blade shaft can be connected using multiple bolts or other fasteners; however, this type of connection requires screwing multiple fasteners sequentially onto the shaft, which is time-consuming, labor-intensive, and inconvenient for installing and replacing the wheel.

[0005] Using a pin to laterally insert a wheel onto the central shaft of the wind turbine blade is a more ideal connection method. However, in actual operation, sudden changes in wind direction and speed can cause uneven stress on the blade's surface, leading to blade oscillation. For vertical axis wind turbines, stable circumferential rotation of the blades is crucial for a stable three-phase voltage output. Unstable blade oscillation makes it extremely difficult to achieve a stable three-phase voltage. Furthermore, with continuous blade oscillation and impact, the pin is subjected to shear forces, leading to loosening gaps. These gaps further increase the blade's oscillation amplitude, subjecting the pin to even greater impact and making the three-phase voltage output increasingly unstable. Utility Model Content

[0006] To overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a non-support structure for preventing wind turbine swaying, and the other is to provide a vertical axis micro wind turbine generator including this structure, which can solve the problem that the blades of existing vertical axis wind turbine generators are prone to swaying, resulting in unstable three-phase output voltage.

[0007] This utility model is achieved through the following technical solution:

[0008] A wind-resistant, non-supported structure for preventing wheel swaying includes: a fan blade, a fan blade connector, a fan blade central shaft, a connecting pin, and a top column; the fan blade is perpendicular to a horizontal mounting surface and is fixed to the outside of the fan blade connector; the fan blade central shaft passes through the fan blade connector axially, and the fan blade central shaft has a fan blade central shaft pin hole radially formed; the connecting pin is inserted into the fan blade central shaft pin hole and the fan blade connector, so that the fan blade connector is fixed to the fan blade central shaft; the number of fan blade connectors and connecting pins is at least two, and they are distributed along the axial direction of the fan blade central shaft; the top column is sleeved on the outside of the fan blade central shaft, and the upper and lower ends of the top column respectively abut against one of the fan blade connectors, so as to push the connecting pin towards the inner wall of the fan blade central shaft pin hole, so that the fan blade connector abuts against the fan blade central shaft.

[0009] Furthermore, the top column is a cylindrical structure with a hollow cavity; the central shaft of the fan blade is housed within the hollow cavity of the top column, and the top and bottom surfaces of the top column respectively abut against the surfaces of the two fan blade connectors.

[0010] Furthermore, the fan blade connector is a central circular flywheel in the shape of a wheel, the central circular flywheel includes a central circular shaft located at the axial position, the central circular shaft is sleeved inside the hollow cavity of the top column; the fan blade is connected to the outer side of the central circular flywheel.

[0011] Furthermore, a radial pin hole is provided on the central shaft of the wheel, and the connecting pin is simultaneously inserted into the pin hole of the wheel and the pin hole of the central shaft of the fan blade, so that the central circular flywheel is fixedly connected to the central shaft of the fan blade.

[0012] Furthermore, the top column is made of lightweight, rust-resistant material.

[0013] Furthermore, the top column is a stainless steel column or an aluminum alloy column.

[0014] Furthermore, there are two central circular flywheels, which are distributed vertically; there is a single top column, and the upper and lower ends of the top column abut against the surfaces of the two central circular flywheels, respectively.

[0015] A vertical axis micro wind generator includes the aforementioned windproof wheel oscillation non-support structure.

[0016] Compared with existing technologies, the beneficial effects that this utility model can achieve are as follows:

[0017] In the past, wind turbine blades were prone to uneven stress due to random changes in wind direction and speed, resulting in swaying. Continuous swaying and impact would subject the connecting pin to shear forces over time, causing it to loosen. This loosening would further exacerbate the blade swaying, and the connecting pin, as both a connector and support, could not effectively prevent swaying. In this invention, a top column is used to press the upper and lower blade connectors together, pushing the connecting pin towards the inner wall of the blade's central shaft pin hole. This ensures the blade connectors are tightly fitted upwards and downwards, resulting in a more stable position. The connecting pin only provides connection and support and is less prone to loosening due to shear forces. Therefore, even if the blades sway due to uneven stress, the central shaft of the blades can still rotate smoothly when the force is transmitted to the blade connectors, ensuring a stable three-phase voltage output from the equipment. Attached Figure Description

[0018] Figure 1 The image shown is a perspective view of this utility model;

[0019] Figure 2 As shown Figure 1 The front view;

[0020] Figure 3 As shown Figure 1 A sectional view;

[0021] Figure 4 As shown Figure 3 A magnified view of a portion at point A;

[0022] Figure 5 As shown Figure 3 A three-dimensional image;

[0023] Figure 6 As shown Figure 5 A magnified view of point B in the image;

[0024] Figure 7 The diagram shown is a structural schematic of the central circular flywheel;

[0025] Figure 8 The diagram shown is a structural schematic of the wind turbine's central shaft.

[0026] In the diagram: 10, fan blade; 20, fan blade connector; 21, central shaft of the wheel; 22, pin hole of the wheel; 30, central shaft of the fan blade; 31, pin hole of the central shaft of the fan blade; 40, connecting pin; 50, top column. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] This utility model discloses a non-support structure for preventing wind turbine swaying, which is applied to a vertical axis wind turbine.

[0032] See Figures 1-3 This wind-resistant, non-supported structure for oscillating windmills includes: a wind turbine blade 10, a wind turbine blade connector 20, a wind turbine blade central shaft 30, a connecting pin 40, and a top column 50. The wind turbine blade 10 is installed perpendicular to the horizontal plane, and there are multiple wind turbine blades 10 fixed to the outside of the wind turbine blade connector 20. The wind turbine blade central shaft 30 passes axially through the wind turbine blade connector 20, and the wind turbine blade central shaft 30 has a wind turbine blade central shaft pin hole 31 in the radial direction (see...). Figure 8 The connecting pin 40 is simultaneously inserted into the fan blade central shaft pin hole 31 and the fan blade connector 20, thereby fixing the fan blade connector 20 to the fan blade central shaft 30. When the fan blade 10 is subjected to airflow, the fan blade 10 drives the fan blade connector 20 to rotate, which in turn drives the fan blade central shaft 30 to rotate. The rotation of the fan blade central shaft 30 can input rotational power to the generator, thus creating conditions for power generation.

[0033] The number of fan blade connectors 20 and connecting pins 40 is the same, and the number can be two or more; in one specific embodiment shown in the figure, the number of fan blade connectors 20 and connecting pins 40 is two. (See also...) Figures 3-6 The top column 50 is sleeved outside the fan blade central shaft 30. The upper and lower end faces of the top column 50 respectively abut against a fan blade connector 20, thereby pushing the connecting pin 40 toward the inner wall of the fan blade central shaft pin hole 31, so that the fan blade connector 20 abuts against the fan blade central shaft 30.

[0034] In the past, the wind turbine blade 10 was prone to uneven stress due to random changes in wind direction and speed, resulting in swaying. Continuous swaying and impacts subjected the connecting pin 40 to shear forces for extended periods, leading to loosening gaps. These loosening gaps further exacerbated the swaying of the wind turbine blade 10. As a connecting and supporting component, the connecting pin 40 did not effectively prevent swaying. In this invention, a top column 50 is used to press against the upper and lower wind turbine blade connecting parts 20, pushing the connecting pin 40 towards the inner wall of the wind turbine blade central shaft pin hole 31. This ensures the wind turbine blade connecting parts 20 are tightly fitted upwards and downwards, resulting in a more stable position. The connecting pin 40 only provides connection and support and is less prone to loosening due to shear forces. Therefore, even if the wind turbine blade 10 sways due to uneven stress, the central shaft 30 can still rotate smoothly when the force is transmitted to the wind turbine blade connecting parts 20, thus ensuring a stable three-phase voltage output from the equipment.

[0035] Preferably, see Figures 5-6 The top support column 50 is a cylindrical structure with a hollow cavity inside. The fan blade shaft 30 is housed within this hollow cavity and fitted with a clearance. The fan blade 10 is rotatable relative to the top support column 50. The top and bottom surfaces of the top support column 50 respectively abut against the surfaces of the two fan blade connectors 20. When there are two fan blade connectors 20, there is only one top support column 50. Of course, depending on the length specifications of the central shaft, the number of fan blade connectors 20 can be set to more. For example, when there are three fan blade connectors 20, there are two top supports 50, with the top and bottom ends of each top support column 50 abutting against the upper and lower fan blade connectors 20 respectively. When there are n fan blade connectors 20, there are (n-1) top supports 50.

[0036] Preferably, see Figure 7The fan blade connector 20 specifically adopts a central circular flywheel in the shape of a wheel, and the fan blade 10 is fixedly connected to the outside of the central circular flywheel. When the fan blade 10 is subjected to airflow and rotates, it drives the central circular flywheel to rotate, which in turn drives the fan blade central shaft 30 to rotate. The central circular flywheel has a circular central shaft 21 located at the axis, and the circular central shaft 21 is sleeved inside the hollow cavity of the top column 50, that is, both the upper and lower ends of the top column 50 are sleeved outside the circular central shaft 21, and the top column 50 has stable installation and guidance.

[0037] More preferably, a circular wheel pin hole 22 is provided on the central shaft 21 of the circular wheel in the radial direction, and the connecting pin 40 is inserted into both the circular wheel pin hole 22 and the central shaft pin hole of the wind turbine, thereby fixing the central circular flywheel and the central shaft 30 of the wind turbine in place.

[0038] Preferably, the top column 50 is made of lightweight, rust-resistant material. Since the top column 50 does not need to support the central flywheel and fan blades 10 (the support function is mainly achieved by the connecting pin 40 itself), using a lightweight material for the top column 50 facilitates smoother operation of the rotating parts of the equipment. Simultaneously, since the generator may be placed outdoors for extended periods, rust-resistant material helps it adapt to various rainy and foggy weather conditions. Furthermore, stainless steel or aluminum alloy materials can be used; of course, other known lightweight, rust-resistant materials can also be employed.

[0039] This utility model also discloses a vertical axis micro wind turbine, including the aforementioned anti-wind wheel oscillation unsupported structure. Any wind turbine that employs the same anti-wind wheel oscillation unsupported structure should be protected within the scope of this utility model.

[0040] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A windproof, non-supported structure for wheel oscillation, characterized in that, include: The fan blade, fan blade connector, fan blade central shaft, connecting pin, and top column are included. The fan blade is perpendicular to the horizontal mounting surface and is fixed to the outside of the fan blade connector. The fan blade central shaft passes through the fan blade connector axially and has a fan blade central shaft pin hole radially. The connecting pin is inserted into the fan blade central shaft pin hole and the fan blade connector to fix the fan blade connector to the fan blade central shaft. There are at least two fan blade connectors and connecting pins, which are distributed along the axial direction of the fan blade central shaft. The top column is sleeved on the outside of the fan blade central shaft, and the upper and lower ends of the top column abut against one of the fan blade connectors to push the connecting pin towards the inner wall of the fan blade central shaft pin hole, so that the fan blade connector abuts against the fan blade central shaft.

2. The windproof wheel oscillation non-support structure as described in claim 1, characterized in that, The top column is a cylindrical structure with a hollow cavity; the central shaft of the fan blade is housed within the hollow cavity of the top column, and the top and bottom surfaces of the top column abut against the surfaces of the two fan blade connectors, respectively.

3. The windproof wheel oscillation non-support structure as described in claim 2, characterized in that, The fan blade connector is a central circular flywheel in the shape of a wheel. The central circular flywheel includes a central circular shaft located at the axial position. The central circular shaft is sleeved inside the hollow cavity of the top column. The fan blade is connected to the outer side of the central circular flywheel.

4. The windproof wheel oscillation non-support structure as described in claim 3, characterized in that, A circular wheel pin hole is radially formed on the central shaft of the circular wheel. The connecting pin is simultaneously inserted into the circular wheel pin hole and the central shaft pin hole of the fan blade, so that the central circular flywheel is fixedly connected to the central shaft of the fan blade.

5. The windproof wheel oscillation non-support structure as described in claim 1, characterized in that, The top column is made of lightweight, rust-resistant material.

6. The windproof wheel oscillation non-support structure as described in claim 5, characterized in that, The top column is a stainless steel column or an aluminum alloy column.

7. The windproof wheel oscillation non-support structure as described in claim 3, characterized in that, There are two central circular flywheels, which are distributed vertically; there is a single top column, and the upper and lower ends of the top column abut against the surfaces of the two central circular flywheels, respectively.

8. A vertical axis micro wind generator, characterized in that, Including the windproof wheel swing non-support structure as described in any one of claims 1 to 7.

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