Rotary piezoelectric power generator

Abstract

The invention relates to a rotary piezoelectric power generator which comprises a plurality of blades 1, a shaft 2, a plurality of piezoresonators 4 and a circular shell 3, wherein the blades 1, the shaft 2 and the piezoresonators 4 are installed inside the circular shell 3; the blades 1 are rigidly connected with the shaft 2 into an integral body along the circumference of the shaft 2; the piezoresonators 4 are rigidly connected with the inner wall of the circular shell 3 along the circumference of the inner wall of the shell 3; the shaft 2 and the shell 3 are coaxial; and while the blades 1 and the circular shell 3 generate a relative movement, the blades 1 generate pulse-type excitation onto the piezoresonators 4, thereby generating electric power in the impact and damped vibration process of the piezoresonators 4. The excitation is applied to the resonators through the rotating blades in the form of a pulse-type impact load to obtain high initial instantaneous power; and by the aid of the interval excitation of the rotating blades, the excitation frequency of the resonators can be multiplied as compared with the original external excitation frequency, so the excitation frequency of the piezoresonators is greatly enhanced, and the energy collection efficiency is high.

Description

technical field [0001] The invention relates to an energy collection device, in particular to a rotary piezoelectric power generation device. Background technique [0002] Due to the excessive use of fossil energy on the earth, many problems such as energy shortage, climate change and greenhouse effect have been caused. Therefore, countries have begun to look for non-polluting alternative energy sources, such as solar energy, hydropower, geothermal energy, wind energy, tidal energy, ocean temperature difference and mechanical vibration energy. Because vibration energy is not affected by weather factors and seasons, it is very common in the living environment, and it can be converted into electrical energy with an appropriate extraction device. It has become a new energy harvesting research hotspot. There are three main forms of vibration energy harvesting: electromagnetic, electrostatic and piezoelectric. Compared with the previous two conversion devices, the piezoelectric ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of low conversion efficiency of the existing piezoelectric energy harvesting device based on low-frequency vibration, and proposes a high-efficiency rotary piezoelectric power generation device

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