A tunnel driving airflow induced vibration energy harvester

Abstract

The present invention relates to an airflow-induced vibration energy harvester for the tunnel driving and belongs to the field of new energy. Two wind shielding plates are arranged on the left side of a shell, and a cross beam is arranged on the right side of the shell. Limiting blocks are arranged on the left side of the front and rear walls of the shell and are positioned closer to the wind shielding plates. The horizontal symmetry centers of the limiting blocks, the cross beam and the shell are overlapped. The upper side and the lower side of the cross beam are provided with piezoelectric vibrators. The contact surfaces of the piezoelectric vibrators with the cross beam are in the form of horizontal planes. Windward plates are arranged at the free ends of the piezoelectric vibrators. Each piezoelectric vibrator is composed of a cantilever beam formed by bonding a substrate to a piezoelectric sheet, wherein the thicknesses of all substrates are the same and the piezoelectric sheet is arranged closer to the cross beam. The windward plates are arranged closer to the substrates. The free ends of the piezoelectric vibrators are positioned on the right sides of the windward plates and are symmetrically arranged on the upper and lower sides of the limiting blocks. The wind blows from the left side and the right side to drive the windward plates to swing left and right in the reciprocating manner and also drives the piezoelectric vibrators to swing up and down in the reciprocating manner. When the free ends of the piezoelectric vibrators abut against the limiting blocks, the deformation amounts of the piezoelectric vibrators are smaller than an allowable value thereof. At a rated wind speed, the static deformation amounts of the piezoelectric vibrators are one half of the allowable value thereof. The windward angles Q of the windward plates are Q = 15 to 60 degrees.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a vibration-induced energy harvester for tunnel traffic. Background technique [0002] Tunnels have become an important part of the current road and rail network. In order to ensure that cars and trains can travel together normally and safely, and realize real-time monitoring of the tunnel environment and passing vehicles, various instruments and lighting facilities need to be installed in the tunnel, so there must also be corresponding power supply facilities in the tunnel. If the traditional cable is used for power supply, the cable laying and subsequent maintenance are more difficult and costly; if the battery is used for power supply, due to the limited life of the battery, it needs to be replaced frequently, which is extremely inconvenient to use, especially in remote mountainous areas. Contents of the invention [0003] The present invention proposes a tun...

AI Technical Summary

Problems solved by technology

If the traditional cable is used for power supply, the cable laying and subsequent maintenance are more difficult and costly; if the battery is used for power supply, due to the limited life of the battery, it needs to be replaced frequently, which is extremely inconvenient to use, especially in remote mountainous areas

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