A Rotationally Excited Oscillating Piezoelectric-Friction Generator

Abstract

The invention relates to a rotary-excited swing piezoelectric-friction generator, which belongs to the technical field of new energy sources. Including swing ring, fixed ring, rolling body, rotating shaft, composite beam, piezoelectric vibrator and bracket, fixed mass and fixed magnet are installed at the bottom of the bracket, moving magnet and moving mass block are installed at the free end of the composite beam; A swing ring is installed on the left half shaft via a fixed ring, and the included angle between the right half axis of the rotating shaft and the axis of the swing ring in the same plane is the shaft inclination angle; the bump of the swing ring is equipped with a bracket, a piezoelectric vibrator and a composite beam. The fixed end of the electric vibrator and the composite beam is clamped between the flat plates of the bracket; the composite beam is composed of the beam substrate and the friction layers on both sides, and the piezoelectric vibrator is composed of the vibrator substrate and the piezoelectric sheet; when the rotating shaft rotates, the composite beam forces The piezoelectric vibrator is reciprocally bent and deformed, and the vibrator substrate and the friction layer alternately contact and separate, thereby converting mechanical energy into electrical energy. Advantages: The organic combination of piezoelectric-friction compound power generation avoids the friction and wear of the sliding friction generator.

Description

technical field [0001] The invention belongs to the technical field of new energy and energy recovery, and in particular relates to a rotary-excited swing piezoelectric-friction generator, which is used for energy collection of fluid turbine generators and rotating shafts. Background technique [0002] In recent years, real-time health sensing monitoring technology for high-rise buildings, bridges, large and high-speed rotating machinery has been widely used. In addition, the monitoring of river water quality pollution, flood prevention and early warning, and air pollution has been highly valued by relevant state departments. Domestic experts and scholars have successively proposed corresponding monitoring methods and means, such as water quality monitoring technology for river water pollution, flood control Monitoring technologies such as rainfall, water level, and river water velocity for natural disasters such as landslides and mudslides. At the same time, in order to re...

AI Technical Summary

Problems solved by technology

From the perspective of practical application, various types of generators currently proposed still face many technical bottlenecks. The common problems are summarized as follows: ① low power generation capacity and energy density per unit volume; Low adaptability to flow velocity, vibration frequency and rotating body speed, ③low reliability, such as piezoelectric ceramics are easily damaged due to excessive environmental vibration intensity, and sliding friction generators are easy to fail due to friction and wear between friction pairs. ④There is electromagnetic interference , such as electromagnetic generators, nonlinear piezoelectric and friction generators based on magnetic coupling auxiliary excitation, there is a certain magnetic field when they work

Of course, it is still difficult to solve all the above-mentioned problems in the same generator

The common feature of pure piezoelectric generators and friction generators is that they have no electromagnetic interference, so they are more suitable for wireless sensor monitoring systems, and their respective power generation capabilities, reliability and environmental adaptability need to be further improved

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