Magnetic force coupling axial excitation-based rotary disk type piezoelectric generator

Abstract

The invention relates to a magnetic force coupling axial excitation-based rotary disk type piezoelectric generator which belongs to the field of piezoelectric power generator. A bearing and a magnet I are embedded on a lathe box body, a rotating shaft is arranged on the lathe box body through the bearing, two sides of a shaft shoulder of the rotating shaft are respectively provided with a rotating disk and a monitoring system, a piezoelectric vibrator is arranged on the rotating disk and is formed by adhering a magnetic metal substrate and a piezoelectric wafer, the piezoelectric vibrator is connected with the monitoring system through a lead group, the flange end of a magnet frame is arranged on the lathe box body through a screw, a magnet II is embedded on the inner side of the bottom end of the magnet frame, and different magnetic poles of the magnet I and the magnet II are installed close to the piezoelectric vibrator. The invention has the advantages that the piezoelectric vibrator of the magnetic metal substrate is placed on the shaft and is coupled and axially excited through a magnetic force without contact impaction, noise and impact damage, electric energy is directly supplied to the monitoring system rotating with the shaft' and the piezoelectric vibrator is axially bent and deformed and the power generation quantity is not influenced by the rotating state, and power can be generated at constant speed and high speed.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric power generation and self-power supply application, and specifically relates to a rotary disk-type piezoelectric generator based on magnetic coupling axial excitation, which is used for power supply of a health status monitoring system of rotating components such as machine tool drive shafts and bearings. 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 hel...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a rotating disk piezoelectric generator based on magnetic coupling axial excitation, aiming at the present situation of self-supply power supply requirements of health monitoring systems for various rotating components such as machine tool transmission shafts and bearings, to solve the problem of existing rotating piezoelectric generators. Problems in reliability and speed adaptability

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