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A Bistable Vortex-Induced Vibration Energy Harvesting Device Based on Internal Resonance

A vortex-induced vibration and energy capture technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, engine components, machines/engines, etc., can solve problems such as difficult miniaturization, and achieve simple and compact device structure, The effect of improving capture efficiency

Active Publication Date: 2022-03-11
XIAN UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a bistable vortex-induced vibration energy capture device based on internal resonance, which solves the problem that the structure of traditional paddle-type power generation devices in the prior art is difficult to miniaturize

Method used

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  • A Bistable Vortex-Induced Vibration Energy Harvesting Device Based on Internal Resonance
  • A Bistable Vortex-Induced Vibration Energy Harvesting Device Based on Internal Resonance
  • A Bistable Vortex-Induced Vibration Energy Harvesting Device Based on Internal Resonance

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] A bistable vortex-induced vibration energy capture device based on internal resonance, such as figure 2 As shown, it includes a cantilever beam 1. The cantilever beam 1 is a cross-like structure. One of the two ends of the cantilever beam 1 is a fixed end, and the other end is a mobile end. The two longitudinal ends of the cantilever beam 1 are free ends. The root is fixed on the frame 8, the PZT-5H piezoelectric film 2 is bonded to the root of the fixed end of the cantilever beam 1, and a blunt body 3 is installed on the free end of the cantilever beam 1. The cross section of the blunt body 3 is circular, and the blunt body 3 The longitudinal direction is perpendicular to the cantilever beam 1, and a linear spring 4 is installed on the moving end of the cantilever beam 1. One end of the linear spring 4 is fixed to the cantilever beam...

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Abstract

The invention discloses a bistable vortex-induced vibration energy capture device based on internal resonance, which is composed of a cantilever beam, a piezoelectric sheet, a blunt body with a circular cross section, a permanent magnet, a spring and a load circuit. Placed in the fluid, the vortex-induced vibration generated by the impact of the fluid on the blunt body is used to promote the reciprocating vibration of the cantilever beam, and the kinetic energy of the fluid is converted into electrical energy by means of piezoelectric sheets. The present invention utilizes the nonlinear magnetic repulsion between the permanent magnets to generate a nonlinear restoring force, so that the device generates bistable vibration, and increases linear elasticity to realize the internal resonance phenomenon of the energy harvesting device. The present invention combines the internal resonance effect and the bistable vibration mode Combined with the application to the field of vortex-induced vibration energy capture power generation, it is expected to become an effective way to broaden the working bandwidth of vortex-induced vibration energy capture devices and improve power generation efficiency.

Description

technical field [0001] The invention belongs to the technical field of fluid power generation equipment, and relates to a bistable vortex-induced vibration energy capture device based on internal resonance. Background technique [0002] At present, with the rapid development of low-power wireless sensor devices and information logistics networks, the problem of long-term effective power supply has increasingly become a major obstacle to the practical and industrialization of micro-sensors. Chemical batteries have been unable to meet the needs of their development due to obvious defects such as short life, relatively large volume, need to be replaced or charged, and easy to cause environmental pollution. Among many green and renewable energy sources, wind energy and water energy are the top ones, and their fluid kinetic energy content is huge and widely distributed. Ocean currents, rivers, and water flows in various urban pipelines are widely present in our living environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18F03B17/06
CPCH02N2/185H02N2/188F03B17/06Y02E10/20
Inventor 吴子英刘丽兰于景涛
Owner XIAN UNIV OF TECH
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