Wave power piezoelectric generating device

A technology of piezoelectric power generation and wave force, which is applied in the field of wave force piezoelectric power generation devices, can solve the problems of low vibration frequency of piezoelectric materials, inability to adapt to incoming wave conditions, low energy, etc., achieve high wave energy conversion rate, and increase output , Reduce the effect of impact and friction loss

Inactive Publication Date: 2010-08-25
TSINGHUA UNIV
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Problems solved by technology

The disadvantages of the two patents are that the vibration frequency of the piezoelectric material is low (wave frequency magnitude), cannot adapt to the incoming wave conditions, and the energy obtained is not high

Method used

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Embodiment Construction

[0018] In the invention, the energy collected by the wave energy collector acts on the piezoelectric vibrator in the form of instantaneous load, so that the piezoelectric vibrator vibrates at a natural frequency, thereby obtaining higher conversion efficiency and output electric energy. The frequency of the output current can maintain the design value and is not affected by the external vibration frequency to increase. Because the frequency is increased (such as 10-120Hz), the output electric energy is easier to be utilized. The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

[0019] As shown in FIG. 1 and FIG. 2 , the present invention includes a wave energy harvester 1 and one or more piezoelectric generating units 2 arranged on the wave energy harvester 1 . A piezoelectric generating unit 2 is taken as an example below.

[0020]The wave energy harvester 1 includes a U-shaped supporting floating body 3 ...

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Abstract

The invention relates to a wave power piezoelectric generating device which comprises a wave energy collector and more than one piezoelectric generating units, wherein the piezoelectric generating units are arranged on the wave energy collector; the wave energy collector comprises a U-shaped supporting floating body and a floating body, wherein the opening of the supporting floating body is connected through a rigid connecting rod; a supporting floating body framework is fixedly arranged on the supporting floating body, four support rods are fixedly arranged on the supporting floating body framework, and a generator soleplate, a generator round wall and a generator top plate are sequentially fixedly arranged at the tops of the four support rods through a generator frame; a floating body framework is arranged on the floating body, the floating body framework is rigidly connected with a driving shaft, and the driving shaft sequentially penetrates through the generator soleplate and the generator top plate; support posts sequentially penetrating through the generator soleplate and the generator top plate are fixedly arranged on the floating body framework, and the tops of the support posts are fixedly connected through connecting rods; and each piezoelectric generating unit comprises a plurality of piezoelectric vibrators and scribing sheets, wherein each piezoelectric vibrator comprises a middle layer and two piezoelectric sheets. The invention can realize sympathetic vibration under various incoming wave conditions and obtain higher wave energy conversion efficiency and output electrical energy.

Description

technical field [0001] The invention relates to a power generation device, in particular to a wave force piezoelectric power generation device for efficiently converting ocean wave energy into electric energy. Background technique [0002] There are various designs of wave power generation devices, which can utilize various motion states of water particles and dynamic pressure generated by waves. At present, the most widely used and relatively mature technology is the oscillating water column, which uses the ups and downs of the wave surface to push the gas in the cavity to reciprocate, and drives the generator to generate electricity through the turbine. The wave energy conversion device is a special type of device. The wave height is amplified through a narrow wedge-shaped channel that shrinks, so that some water bodies are stored in the storage tank on the top of the device, and then the gravitational potential energy of these water bodies is converted into electrical en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
Inventor 张永良林政
Owner TSINGHUA UNIV
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