Shaft power generator based on axial flexural vibration of piezoelectric vibrator of cantilever beam

Abstract

The invention relates to a shaft power generator based on axial flexural vibration of a piezoelectric vibrator of a cantilever beam, and belongs to the field of piezoelectric power generation. A bearing and a first stationary magnet are embedded on the side wall of a machine frame, a magnet rack is mounted at one end part of a box body of the machine frame, and a second stationary magnet is embedded on the magnet rack; one end of a rotary shaft is mounted on the machine frame through the bearing, the piezoelectric vibrator and a monitoring system are mounted on a shaft shoulder, and a first movable magnet and a second movable magnet are mounted at the free end of the piezoelectric vibrator; the movable magnets are mounted in a way that unlike magnetic poles are mounted oppositely, and the like magnetic poles of the movable magnets and the stationary magnets are mounted oppositely; the number of the first stationary magnets is equal to the number of the second stationary magnets, and the distance from the geometrical center of each stationary magnet to the center of the rotary shaft is equal to the distance from the geometrical center of each movable magnet to the center of the rotary shaft. The shaft power generator has the following advantages: contact impact, noise and impact failure are avoided, electric energy is supplied to the monitoring system rotating along with the shaft, and power can be generated in the constant speed and high speed states.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric power generation and self-power supply application, in particular to an axial generator based on the axial bending vibration of a cantilever beam piezoelectric vibrator. Background technique [0002] The research on constructing micro-scale piezoelectric generators by using sheet-type piezoelectric vibrators has become a hot spot both at home and abroad for many years. According to the different sources of motive power and application purposes of generators, cantilever beam piezoelectric generators with various structural forms have been proposed at home and abroad, mainly including vibration type and rotary type. Among them, the rotary piezoelectric generator was originally proposed to solve the self-powered sensor monitoring of rotating bodies such as helicopter propellers, automobile tire pressure, aeroengines, high-speed trains, and oil and gas drill spindles; in addition, the demand for...

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Problems solved by technology

[0005] The invention provides an axial generator based on the axial bending vibration of a cantilever beam piezoelectric vibrator, aiming at the present situation of self-power supply requirements of various rotating component health monitoring systems, to solve the problem of reliability and rotational speed adaptation of existing rotating piezoelectric generators. problems in ability

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