Modular directional flow pipeline type piezoelectric energy harvester arranged in a circumferential array

Abstract

The invention relates to a modular directional flow pipeline type piezoelectric energy harvester arranged in a circumferential array, which belongs to the technical field of water flow and air flow induced vibration energy harvesting and solves the problems that energy harvesters in the existing flow-induced energy harvesting are mostly fixed, the mutual coupling relation is difficult to adjust and that the application limitation is large. The piezoelectric energy harvester comprises a flow-gathering and speed-accelerating coil and at least one piezoelectric module, the piezoelectric modules are connected in series when there are two or more piezoelectric modules, each piezoelectric module includes a plurality of piezoelectric vibrators, a central support, a current-limiting outer ring andconnecting screws; the central support and the current-limiting outer ring are coaxially arranged inside and outside and are connected through a plurality of connecting screws, and the plurality of piezoelectric vibrators are arranged in a circumferential array between the central support and the current-limiting outer ring; the flow-gathering and speed-accelerating ring is coaxially arranged onthe outer end face of the current-limiting outer ring on the incoming side; and a plurality of long holes are formed in the central support along the circumferential direction of the central support.The piezoelectric energy harvester can be widely applied to energy collection in the fields of stream pipelines, distillation pipelines, tap water pipelines, exhaust pipelines and the like.

Description

technical field [0001] The invention relates to a piezoelectric energy harvester, in particular to a piezoelectric energy harvester arranged in a circumferential array of modular directional flow pipelines, and belongs to the technical field of vibration energy harvesting caused by water flow and air flow. Background technique [0002] Flow-induced vibration energy capture is a technology that uses the vortex induced force generated by the alternately shedding vortices to excite the vibration of the energy-harvesting vibrator when the water flow or air flow passes through the non-streamlined object, thereby generating electric energy. [0003] Most of the flow-induced vibration energy harvesters in the prior art are single or series-parallel energy harvesters, and the space utilization rate needs to be developed, and it is difficult to reach the resonance frequency of the energy harvester in the face of low-speed fluid, thereby affecting the output. Studies have shown that t...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a piezoelectric energy harvester arranged in a circumferential array of modular directional flow pipelines, to solve the problem that most of the energy harvesters in the existing flow-induced vibration energy harvesting are fixed and the coupling relationship between them Difficult to adjust and large application limitations

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