A vertical axis wind turbine with a lift-drag combined blade for recovering vibration energy

Abstract

The present invention relates to an integrated device that combines multiple energy sources such as wind energy, electrical energy, and vibration energy, solves the problems of insufficient energy utilization and large space occupation of the energy comprehensive utilization system, and discloses a vertical-axis wind turbine with a lift-drag combined blade for recovering vibration energy, which includes: a vertical-axis wind turbine unit, a vibration recovery device, a lift-drag conversion control unit, and a lift-drag combined blade. The wind turbine of this device is a vertical-axis wind turbine vertically installed, which uses a lift-drag combined blade. The lift-drag conversion of the blade is controlled by the lift-drag conversion control unit to adjust the windward effect of the device and enhance the starting performance at low wind speeds. A vibration recovery device is installed on both sides of its blade, which can reduce energy loss and realize wind power generation and vibration energy recovery.

Description

Technical Field

[0001] The present invention relates to an integrated device combining multiple energy sources such as wind energy, electric energy, and vibration energy, and particularly to a vertical axis wind turbine with a lift-drag combined blade for recovering vibration energy. Background Art

[0002] Existing lift-type vertical axis wind turbines have a high tip speed ratio and can well exert their own advantages especially at high rotational speeds, achieving a high wind energy utilization rate. However, their starting torque is small and it is difficult to achieve self-starting. In contrast, existing drag-type vertical axis wind turbines can obtain a large starting torque and have good starting performance at low wind speeds. However, their wind energy utilization rate is low, and especially at high tip speed ratios, the power coefficient will drop to a negative value. Whether it is a lift-type or a drag-type vertical axis wind turbine, vibration will be generated during rotation, which increases the instability factors of the equipment. To solve the problems existing in the above two types of wind turbines, a vertical axis wind turbine with a lift-drag combined blade for recovering vibration energy has been developed.

[0003] Currently, the technical performance of the lift-drag combined vertical axis wind turbine has been greatly improved compared with that of a single lift-type vertical axis wind turbine or a single drag-type vertical axis wind turbine. However, in actual operation, when the lift-type vertical axis wind turbine enters the normal rotational speed to drive the generator for power generation operation, that is, when the lift-type vertical axis wind turbine is disengaged from the drag-type vertical axis generator, only the lift-type vertical axis wind turbine drives the wind turbine generator to complete the power generation operation, while the drag-type vertical axis wind turbine, although still rotating at its own rotational speed, does not and cannot drive the generator to generate electricity, which is equivalent to idling and not doing work, wasting a large amount of wind resources and having a low power generation efficiency. Moreover, due to structural reasons, both the lift-type vertical axis wind turbine and the drag-type vertical axis wind turbine will generate vibrations during operation, which also reduces the stability of the equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a vertical axis wind turbine with a lift-drag combined blade for recovering vibration energy to solve the problems of poor starting performance of the lift-type vertical axis wind turbine at low wind speeds and low wind energy utilization coefficient of the drag-type vertical axis wind turbine in the prior art, and also to solve the problem of equipment instability caused by vibrations of the lift-type and drag-type vertical axis wind turbines, and to make the most of energy resources as much as possible.

[0005] To achieve the above-mentioned purpose, the present invention adopts a technical solution for the combined utilization of wind power and vibration energy: a vertical axis wind turbine with lift-drag combined blades that recover vibration energy, comprising: a vertical axis wind turbine assembly, a vibration recovery device, a lift-drag conversion control unit, and lift-drag combined blades. The vertical axis wind turbine assembly comprises a bracket, a rotating base, a rotating platform, a cylinder platform, a generator, and lift-drag combined blades, which are used to convert wind energy into electrical energy; the vibration recovery device comprises an airbag and an air tank, which are used to collect the gas generated by vibration; the lift-drag conversion control unit comprises a cylinder, a solenoid valve, and a lift-drag conversion unit, which can use the gas recovered by the vibration recovery device to control the lift-drag conversion unit of the blades, converting to a drag type during startup to improve the startup performance of the vertical axis wind turbine, and converting to a lift type during operation to enhance the power coefficient of the vertical axis wind turbine, thereby improving the utilization of wind energy.

[0006] In addition, the present invention also provides the following technical solutions:

[0007] The vertical axis wind turbine is vertically mounted on a bracket, a rotating platform is provided at the rotation center of the vertical axis wind turbine, the lift-drag combined blades are mounted in a V-shape, and the generator is mounted at the bottom.

[0008] The lift-drag combined blade is a lift-drag conversion unit installed on the side of the lift-type blade facing away from the rotation axis.

[0009] The vibration recovery device has an air bag installed between the blade and the rotating base, and an air storage tank installed on the lower side of the rotating platform to recover the gas generated by the vibration of the equipment.

[0010] The lift-drag conversion control unit is installed on the lift-drag combined blade, the cylinder is installed on the cylinder platform in the middle of the side of the lift-drag combined blade facing the rotating shaft, and the solenoid valve is installed on the upper side of the rotating platform and is driven by the gas recovered by the vibration recovery device.

[0011] Compared with the prior art, the advantages of the present invention are:

[0012] The present invention adopts lift-drag combined blades, which can solve the problem of poor starting performance of lift-type vertical axis fans and the problem of low wind power utilization rate of drag-type vertical axis fans. Compared with other lift-drag combined vertical axis fans, the use of only lift-drag combined blades and lift-drag conversion control units eliminates many complex structures and control devices, saves materials, and reduces occupied space.

[0013] The present invention adopts a vibration recovery device to recover the gas generated by the vibration of the vertical axis wind turbine during operation, and uses this gas to drive the lift-drag conversion control unit to perform lift-drag conversion on the blades, thereby maintaining the stability of the equipment operation and efficiently utilizing energy.

[0014] The present invention can adjust the lift-drag combined blade according to the local wind speed, adjust the blade to the drag type at low wind speeds, and adjust it to the lift type at high wind speeds to achieve efficient utilization of wind energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a vertical-axis wind turbine with a lift-drag combined blade for recovering vibration energy according to the present invention.

[0016] Figure 2 It is a schematic structural diagram of the vibration recovery device of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the lift-drag conversion control unit of the present invention.

[0018] Explanation of each label in the figure: 1-1 Vertical-axis wind turbine rotating base, 1-2 Generator, 1-3 Rotating platform, 1-4 Cylinder platform, 1-5 Lift-drag combined blade, 1-6 Bracket, 2-1 Airbag, 2-2 Gas storage tank, 3-1 Solenoid valve, 3-2 Cylinder, 3-3 Lift-drag conversion unit. EMBODIMENT

[0019] The technical solution of the present invention will be further described in detail and non-limitingly below in conjunction with the preferred embodiments and their accompanying drawings.

[0020] Refer to Figure 1 , a vertical-axis wind turbine with a lift-drag combined blade for recovering vibration energy mainly includes a vertical-axis wind turbine unit, a vibration recovery device, a lift-drag conversion control unit, and a lift-drag combined blade. Among them, the vertical-axis wind turbine unit includes a vertical-axis wind turbine rotating base 1-1, a generator 1-2, a rotating platform 1-3, a cylinder platform 1-4, a lift-drag combined blade 1-5, and a bracket 1-6. It can be seen from Figure 1 In this embodiment, the vertical-axis wind turbine rotating base 1-1 is installed on the bracket 1-6, the lift-drag combined blade 1-5 is installed on the vertical-axis wind turbine rotating base 1-1, the generator 1-2 is installed below the rotating platform base 1-1, the rotating platform 1-3 is installed above the rotating platform base 1-1, and a cylinder platform 1-4 is provided in the middle of the inner side of the lift-drag combined blade 1-5.

[0021] Combined with Figure 2 , the vibration recovery device includes an airbag 2-1 and a gas storage tank 2-2. The airbag 2-1 is installed between the blade 1-5 and the rotating base 1-1, and the gas storage tank 2-2 is installed below the rotating platform 1-3 for storing the gas pressed into by the vibration during the rotation of the wind turbine through the airbag 2-1.

[0022] Combined with Figure 3, the lift-drag conversion control unit includes a solenoid valve 3-1, a cylinder 3-2, and a lift-drag conversion unit 3-3. The solenoid valve 3-1 is installed above the rotating platform 1-1, and the cylinder 3-2 is installed above the cylinder platform 1-4 inside the lift-drag combined blade 1-5. The gas in the gas storage tank 2-2 is used under the control of the solenoid valve 3-1 to push the lift-drag conversion unit 3-3 to complete the conversion of the lift-drag combined blade 1-5.

[0023] For the vertical axis wind turbine with lift-drag combined blades that recovers vibration energy provided by the present invention, at low wind speeds, the lift-drag conversion unit 3-3 makes the lift-drag combined blade 1-5 become a drag type by the push of the cylinder 3-2, improving the starting performance of the wind turbine; after starting is complete, the lift-drag conversion unit 3-3 makes the lift-drag combined blade 1-5 become a lift type by the push of the cylinder 3-2, improving the power generation efficiency after the wind turbine operates stably; due to its own structural reasons during operation, the wind turbine will inevitably generate vibrations. The airbag 2-1 is used to press the gas into the gas storage tank 2-2 through the air pipe (not shown) using the energy during vibration. The gas storage tank 2-2 is connected to the solenoid valve 3-1 and the cylinder 3-2 through the air pipe (not shown). The gas pressed in by vibration is used to drive the cylinder 3-2 to push the lift-drag conversion unit 3-3, so that the lift-drag combined blade 1-5 completes the lift-drag conversion, which not only increases the stability of the vertical axis wind turbine with lift-drag combined blades that recovers vibration energy, but also increases the starting performance of the device without loss of power generation efficiency when ensuring the stable operation of the device.

[0024] It should be noted that the above preferred embodiments are only used to illustrate the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A vertical-axis wind turbine with a lift-drag combined blade for recovering vibration energy, characterized in that It includes: A vertical-axis wind turbine, a vibration recovery device, a lift-drag conversion control unit, and lift-drag combined blades. Among them, the vertical-axis wind turbine includes a support, a rotating base, a rotating platform, a cylinder platform, a generator, and lift-drag combined blades, and is used to convert wind energy into electrical energy; the vibration recovery device includes an airbag and a gas storage tank, and is used to collect the energy generated by vibration; the lift-drag conversion control unit includes a cylinder, a solenoid valve, and a lift-drag conversion unit, and is used to control the lift-drag conversion of the blades; the vertical-axis wind turbine is vertically installed on the support. A rotating platform is provided at the rotation center of the vertical-axis wind turbine. The lift-drag combined blades are installed in a V shape, and the generator is installed at the bottom; for the lift-drag conversion control unit, the lift-drag conversion unit is installed on the lift-drag combined blades. The cylinder is installed on the cylinder platform in the middle on the side of the lift-drag combined blades facing the rotating shaft. The solenoid valve is installed on the upper side of the rotating platform and is driven by the gas recovered by the vibration recovery device.

2. The vertical-axis wind turbine with a lift-drag combined blade for recovering vibration energy according to claim 1, wherein: For the lift-drag combined blades, a lift-drag conversion unit is installed on the side of the lift-drag combined blades facing away from the rotating shaft.

3. The vertical-axis wind turbine with a lift-drag combined blade for recovering vibration energy according to claim 1, wherein: For the vibration recovery device, the airbag is installed between the blade and the rotating base, and the gas storage tank is installed under the rotating platform to recover the gas generated by vibration.

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