Wind turbine generator energy collection system based on piezoelectric effect

Abstract

A wind turbine generator energy collection system based on the piezoelectric effect comprises an installation shell, and an energy collection structure is installed on the installation shell. The energy collection structure comprises a mounting frame arranged on the mounting shell, limiting sliding heads in sliding fit with the mounting frame are symmetrically arranged on the left side and the right side of the mounting frame, the symmetrically-arranged limiting sliding heads are connected through a connecting pipe, and a permanent magnet mass block in sliding connection with the connecting pipe is arranged on the connecting pipe. Suspension beam arms are symmetrically arranged on the front face and the rear face of the permanent magnet mass block, and a plurality of permanent magnet matching blocks are arranged on the edge of the installation frame. By the adoption of the structure, vibration energy, generated in the operation process of the offshore wind turbine generator, in multiple directions can be captured and converted into electric energy, and therefore the overall energy utilization efficiency of the wind turbine generator is improved; the structural vibration of the wind turbine generator is controlled and reduced, the fatigue load of the structure is reduced, the safety risk caused by vibration is reduced, the service life of the wind turbine generator is prolonged, and the operation safety of the wind turbine generator is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy engineering technology, and in particular to a wind turbine energy harvesting system based on the piezoelectric effect. Background Technology

[0002] With the continuous development of energy-saving and environmental protection technologies, the renewable energy sector has made great progress. Offshore wind power technology, due to its abundant resources and broad utilization prospects, is expected to become a major force in green energy. However, strong winds at sea cause wind turbines to be affected by wind and vibration during operation. Vibration not only affects their performance but may also lead to fatigue and damage. Because the wind direction experienced by offshore wind turbines is not fixed, and the vibration direction of the blades constantly changes during rotation, the energy harvesting device needs to be able to respond to and collect vibration energy from multiple directions. Therefore, how to effectively utilize the vibration energy generated by wind turbines during operation has become an urgent problem to be solved. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a wind turbine energy harvesting system based on the piezoelectric effect, which can capture the vibration energy generated by offshore wind turbines in multiple directions during operation and convert it into electrical energy, thereby improving the overall energy utilization efficiency of the wind turbine. Offshore wind turbines will vibrate under the excitation of wind and waves. Equipping the system with an energy harvesting device can absorb this vibration energy, control and reduce the structural vibration of the wind turbine, reduce the fatigue load on the structure, reduce the safety risks caused by vibration, extend the service life of the wind turbine, and improve the operational safety of the wind turbine. The device has a simple and reasonable structure, is flexible in installation and adaptation, and is highly practical.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a wind turbine energy harvesting system based on the piezoelectric effect, including a mounting shell, on which an energy harvesting structure is mounted;

[0005] The energy harvesting structure includes a mounting frame mounted on a mounting shell. The left and right sides of the mounting frame are symmetrically provided with limiting sliders that slide with it. The symmetrically provided limiting sliders are connected by a connecting pipe. The connecting pipe is provided with a permanent magnet mass block that slides with it. The front and rear surfaces of the permanent magnet mass block are symmetrically provided with cantilever arms. Multiple permanent magnet mating blocks are provided on the edge of the mounting frame.

[0006] In a preferred embodiment, the mounting frame is a rectangular frame, and permanent magnet mating blocks are provided on all four sides of the mounting frame.

[0007] In a preferred embodiment, the permanent magnet mass block and the multiple permanent magnet mating blocks are permanent magnets with the same pole.

[0008] In a preferred embodiment, the connecting pipe is made of carbon fiber.

[0009] In a preferred embodiment, the cantilever arm is made of lead-zinc titanate ceramic material.

[0010] The piezoelectric effect-based wind turbine energy harvesting system provided by this utility model has the following beneficial effects by adopting the above structure:

[0011] (1) It can capture the vibration energy generated in multiple directions during the operation of offshore wind turbines and convert it into electrical energy, thereby improving the overall energy utilization efficiency of wind turbines;

[0012] (2) Offshore wind turbines will vibrate under the excitation of wind and waves. Equipping them with energy harvesting devices can absorb these vibration energy, control and reduce the structural vibration of the wind turbine, reduce the fatigue load of the structure, reduce the safety risks caused by vibration, extend the service life of the wind turbine, and improve the operational safety of the wind turbine.

[0013] (3) The device has a simple and reasonable structure, is flexible in installation and adaptation, and is highly practical. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the energy harvesting structure of this utility model.

[0017] In the diagram: 1. Housing; 2. Energy harvesting structure; 3. Mounting frame; 4. Limiting slider; 5. Connecting pipe; 6. Permanent magnet mass block; 7. Cantilever arm; 8. Permanent magnet mating block. Detailed Implementation

[0018] like Figure 1-2 In the present invention, a wind turbine energy harvesting system based on the piezoelectric effect includes a mounting housing 1, wherein an energy harvesting structure 2 is mounted on the mounting housing 1.

[0019] The energy harvesting structure 2 includes a mounting frame 3 mounted on the mounting housing 1. The mounting frame 3 has symmetrically arranged limiting slide heads 4 on its left and right sides, which are slidably engaged with it. The symmetrically arranged limiting slide heads 4 are connected by a connecting pipe 5. The connecting pipe 5 is provided with a permanent magnet mass block 6 that is slidably connected with it. The front and rear surfaces of the permanent magnet mass block 6 are symmetrically arranged with cantilever arms 7. The edge of the mounting frame 3 is provided with multiple permanent magnet mating blocks 8.

[0020] In the preferred embodiment, the mounting frame 3 is a rectangular frame, and permanent magnet mating blocks 8 are provided on all four sides of the mounting frame 3. These blocks are evenly distributed to reduce the amplitude of the cantilever beam 3 on both the longitudinal and transverse displacement surfaces.

[0021] In a preferred embodiment, the permanent magnet mass block 6 and the multiple permanent magnet mating blocks 8 are permanent magnets with the same poles. Like poles repel each other, and magnetic force is used to reduce the amplitude.

[0022] In a preferred embodiment, the connecting pipe 5 is made of carbon fiber. This not only makes it lightweight but also ensures high overall structural strength.

[0023] In a preferred embodiment, the cantilever arm 7 is made of lead-zinc titanate ceramic. Ceramic materials exhibiting piezoelectric effect undergo internal polarization when mechanical stress is applied, leading to charge separation and thus generating a voltage across the material. Conversely, applying a voltage can also induce material deformation.

[0024] The method of using this utility model is as follows: During the operation of offshore wind turbines, the blades, towers and other components of the wind turbine will vibrate due to the wind force. The vibration direction of the wind turbine is not always in one direction. For example, the blades will rotate continuously, and their vibration direction will also change continuously.

[0025] The cantilever beam 7, made of lead-zinc titanate ceramic, can simultaneously collect vibration energy in two directions (lateral and longitudinal) in a plane, improving energy collection efficiency and providing power to the sensors and other electrical equipment of the wind turbine. It also reduces the vibration effects of wind and waves on the wind turbine, enhancing its stability. A matching block 8 of the same pole permanent magnet and a permanent magnet mass block 6 are installed at the edge of the mounting frame 3 to reduce the amplitude of the cantilever beam 3, preventing excessive amplitude from damaging the PZT material and reducing maintenance costs.

[0026] The beneficial effects of this utility model are: it can capture the vibration energy generated by offshore wind turbines in multiple directions during operation and convert it into electrical energy, thereby improving the overall energy utilization efficiency of the wind turbines; offshore wind turbines will vibrate under the excitation of wind and waves, and the energy harvesting device can absorb this vibration energy, control and reduce the structural vibration of the wind turbines, reduce the fatigue load on the structure, reduce the safety risks caused by vibration, extend the service life of the wind turbines, and improve the operational safety of the wind turbines; the device has a simple and reasonable structure, is flexible in installation and adaptation, and is highly practical.

Claims

1. A wind turbine energy harvesting system based on the piezoelectric effect, comprising a mounting housing (1), characterized in that: The mounting housing (1) is equipped with an energy harvesting structure (2); The energy harvesting structure (2) includes a mounting frame (3) set on the mounting shell (1). The left and right sides of the mounting frame (3) are symmetrically provided with limiting slide heads (4) that slide with it. The symmetrically provided limiting slide heads (4) are connected by a connecting pipe (5). The connecting pipe (5) is provided with a permanent magnet mass block (6) that slides with it. The front and rear surfaces of the permanent magnet mass block (6) are symmetrically provided with cantilever arms (7). The edge of the mounting frame (3) is provided with multiple permanent magnet mating blocks (8).

2. The wind turbine energy harvesting system based on the piezoelectric effect according to claim 1, characterized in that: The mounting frame (3) is a rectangular frame, and permanent magnet mating blocks (8) are provided on all four sides of the mounting frame (3).

3. The wind turbine energy harvesting system based on the piezoelectric effect according to claim 1, characterized in that: The permanent magnet mass block (6) and the multiple permanent magnet mating blocks (8) are permanent magnets with the same pole.

4. The wind turbine energy harvesting system based on the piezoelectric effect according to claim 1, characterized in that: The connecting pipe (5) is made of carbon fiber.

5. The wind turbine energy harvesting system based on the piezoelectric effect according to claim 1, characterized in that: The cantilever arm (7) is made of lead-zinc titanate ceramic material.

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