A Constant Amplitude Excited Turbine Piezoelectric-Friction Generator

Abstract

The invention relates to a constant-amplitude excitation turbine piezoelectric-friction generator, which belongs to the technical field of new energy sources. The end cover is installed on the end of the casing, the rotating shaft is installed on the end cover and the bottom of the casing, and the circuit board is installed on the bottom of the casing: the shaft sleeve with the excitation ring on the outer edge is sleeved on the rotation shaft, and the axis of the excitation ring is in line with the casing. The cylinder axis is parallel; the excitation ring is set on the excitation ring, and there are inclined excitation surfaces on both sides of the outer edge of the excitation ring; The electric sheet and the substrate are composed of a radial beam on the inner edge of the spacer ring of the spacer, and a composite film composed of a friction layer and an electrode layer is bonded on both sides of the radial beam; the substrate and the piezoelectric sheet constitute a piezoelectric power generation unit, and the substrate and The composite film adjacent to it constitutes a triboelectric power generation unit; when the piezoelectric vibrator is in no deformation, the side of the substrate is attached to the friction layer adjacent to it, and the free end is in contact with the excitation surface; the piezoelectric power generation unit and the triboelectric power generation unit are different The wire set and rectifier bridge are connected to the circuit board.

Description

technical field [0001] The invention belongs to the technical field of new energy and energy recovery, and in particular relates to a constant-amplitude excitation turbine piezoelectric-friction generator for collecting wind energy and water flow energy. Background technique [0002] In recent years, 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, for Monitoring technology for rainfall, water level, and river water velocity of natural disasters such as floods and mudslides. At the same time, in order to realize the self-power supply and maintenance-free of the monitoring system, people have also developed micro-miniature generators for various environmental monitoring systems. At present, there are...

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

Images