Piezoelectric energy harvester for recovering fluid impact jet energy

Abstract

The invention discloses a piezoelectric energy harvester for recycling fluid impact jet energy. The piezoelectric energy harvester comprises a cavity, a turbulent flow column and a flexible piezoelectric cantilever beam; the center of the front end face of the cavity is provided with an air inlet connected with an exhaust pipeline, and the rear end face of the cavity is communicated with the atmosphere; a fixing plate is arranged in the cavity; one end of the flexible piezoelectric cantilever beam is connected with the fixing plate, and the other end of the flexible piezoelectric cantilever beam is connected with the turbulent flow column for generating electric energy; the cross section of the turbulent flow column is in an open arc shape, and an arc-shaped opening of the turbulent flow column right faces jet flow and is used for improving the coupling effect. The flexible piezoelectric cantilever is of a cantilever beam type structure, and the flexible piezoelectric cantilever and the turbulent flow column generate sine curve vibration under the action of incoming gas flow so as to generate sine curve voltage. The piezoelectric energy harvester can generate large-amplitude vibration under jet flow impact, exhaust energy is converted into electric energy through the direct piezoelectric effect to be collected and stored, recycling of micro energy can be achieved, and a novel energy supply mode is provided for low-power-consumption equipment.

Description

technical field [0001] The invention belongs to the field of pneumatic energy recovery, in particular to a piezoelectric energy harvester for recovering fluid impact jet energy. Background technique [0002] Pneumatic transmission system is widely used in manufacturing factories of all walks of life because of its advantages of wide power source, no pollution, fast response and high reliability, as an important means to realize production automation. However, the efficiency of the pneumatic system is much lower than that of the hydraulic system and the electrical system, and the energy utilization efficiency is low due to problems such as exhaust waste, so the energy saving potential of the pneumatic system is huge. Pneumatic systems require frequent intake and exhaust, and the compressed air that has done work is usually not reused, but directly discharged into the atmosphere. Although compressed air is taken from the atmosphere and has a wide range of sources, this part o...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a piezoelectric energy harvester for recovering the energy of fluid impact jets, so as to solve the problem of back pressure generated by traditional pneumatic exhaust recovery

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