Rotary magnetic force frequency modulation type laminated efficient piezoelectric energy harvester

Abstract

The invention discloses a rotary magnetic frequency modulation type laminated efficient piezoelectric energy harvester, belongs to the technical field of vibration energy harvesting, and aims to solve the problems of short service life, insufficient space utilization rate, single frequency modulation mode and low energy harvesting efficiency caused by the fact that most of existing rotary energy harvesters are piezoelectric devices fixed on a rotary disc. A piezoelectric cantilever beam is fixedly connected to a cylinder through bolts, nuts and clamping plates; the cylinder is connected with a cover plate through threads; a rotating shaft of a rotating disc is coaxially connected with a center hole of the cover plate through a bearing; and magnets are evenly distributed and pasted on discs on the rotating disc in the circumferential direction. According to the rotary magnetic frequency modulation type laminated efficient piezoelectric energy harvester, the space utilization rate of the energy harvester can be increased by changing the number of the discs and the shape of the inner surface of the cylinder, the excitation frequency can be adjusted by changing the number of the magnets and the rotating speed; and the rotary magnetic frequency modulation type laminated efficient piezoelectric energy harvester has the advantages of flexible design, various frequency modulation modes, high energy harvesting efficiency and the like; and the energy harvester can be widely applied to energy collection in the fields of gearboxes, steam turbines, automobile wheels and the like.

Description

[0001] Technical field [0002] The invention relates to a piezoelectric energy harvester, in particular to a rotating magnetic frequency modulation laminated high-efficiency piezoelectric energy harvester, which belongs to the technical field of vibration energy harvesting. Background technique [0003] In recent years, the country has vigorously advocated the development and utilization of green energy and new energy, but at present, whether it is used in daily necessities or industrial products, electrochemical batteries are still used to power them, which will not only pollute the environment and damage, and when the sensor is used in some mechanical or dangerous situations with a relatively complex structure, it is a very troublesome and complicated task to replace the battery. [0004] Vibration energy harvesting is a technology that can convert vibration mechanical energy in the environment into electrical energy, mainly including electromagnetic energy harvesting, elec...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a rotary magnetic frequency modulation stacked high-efficiency piezoelectric energy harvester to solve the problems of limited space utilization, single energy harvesting and frequency modulation of rotating machinery, and low energy harvesting efficiency

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