A Rotary Piezoelectric Wind Generator with Radial Tensile Excitation

Abstract

The invention relates to a rotation-type piezoelectricity wind generator with radial tension excitation and belongs to the field of new energy. Both ends of a shell are respectively equipped with an end cover, a sleeve is pressed between said two end covers, and bearing holes on both ends of the sleeve are embedded with bearings; a main shaft is positioned and installed on the sleeve by two bearings and embedded with magnetic stripes, and the end of the main shaft is provided with blades; an energy converter is composed of a piezoelectric vibrator, wedge blocks and magnetic blocks both which are riveted on both ends of the piezoelectric vibrator; guide posts are arranged on the magnetic blocks and in radial guide holes of the sleeve, and the wedge blocks are arranged in a dovetail slot on the inner wall of the shell; the magnetic pole of each magnetic block on each energy converter has the same configuration direction and is adjacent to the opposite magnetic pole of each magnetic stripe embedded on the main shaft; the magnetic blocks always bear attraction of the magnetic stripes on the main shaft when the main shaft rotates. The characteristics and advantages of the wind generator are that power is generated through expansion deformation in the length direction of the pre-bending piezoelectric vibrator, the piezoelectric plate has high reliability only under stress action; multiple groups of piezoelectric vibrator are powered through the main shaft embedded with the magnetic stripes and non-contact excitation, the wind generator is strong in power generation and supply and has no mechanical impact and noise.

Description

technical field [0001] The invention belongs to the technical field of new energy sources, and in particular relates to a rotary piezoelectric wind generator driven by radial stretching, which provides real-time energy supply for micro-power wireless systems such as wireless sensor nodes. Background technique [0002] Wind energy widely exists in nature, and wind power generation has become one of the mainstream energy sources in the world today. In the past, people only focused on the research of large-scale wind power generation systems. The study of micro-wind generators that provide continuous energy supply has attracted extensive attention from scholars at home and abroad. Frequent replacement severely restricts the popularization and application of wireless sensor network monitoring systems in remote and dangerous environments. The micro-wind generators that have been proposed so far are basically based on the electromagnetic principle and the piezoelectric principle...

AI Technical Summary

Problems solved by technology

The common feature of the above-mentioned piezoelectric generators is that they all use the bending deformation of the piezoelectric vibrator to generate electricity. One of the disadvantages is that the bending deformation of the piezoelectric vibrator is uncontrollable and easy to be damaged due to excessive tensile stress. The second disadvantage is bending When the cantilever beam is deformed, the stress of the piezoelectric vibrator varies greatly, the stress on the root is the largest, and the stress on the free end is zero, so the power generation capacity and reliability are low

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