Device and method for collecting electric energy by utilizing vortex-induced vibration of streaming of double cones

Abstract

The invention discloses a device and a method for collecting electric energy by utilizing vortex-induced vibration of streaming of double cones. The device comprises a support frame, a connecting frame, a support spring, the double cones and a dielectric elastomer power generation device, the double cones and the dielectric elastomer power generation device are connected through a disc end plate and the connecting frame, the connecting frame and the supporting frame are hinged through the connecting pin shaft, one end of the supporting spring and one end of the supporting frame are connected with the disc end plate and the connecting frame, and the other end is connected with the flow channel wall face. The device is simple in structure, free of extra energy loss and suitable for fluid energy collection in a wide flow velocity range; and fluid generates vortex-induced vibration through the cones to drive the dielectric elastomer power generation device to convert flow energy into electric energy. The vortex shedding frequencies of fluid passing through different cross sections of the cone are different, so that the vortex shedding frequency at a certain cross section is consistent with the inherent frequency of the structure to generate resonance, the kinetic energy of the fluid can be effectively utilized to generate power in a wide incoming flow speed range, the conversion efficiency is high, and the power generation capacity can be greatly improved.

Description

technical field [0001] The invention relates to a device for generating electricity by utilizing flow energy, in particular to a device and method for collecting electric energy by using double-cone circumnavigation vortex-induced vibration. Background technique [0002] Today, energy issues are still the focus of global attention. The pollution of traditional fossil energy and its gradual depletion are becoming more and more serious. The development and utilization of renewable energy has attracted great attention from all countries. Flow energy in the form of wind energy, tidal energy, water currents and ocean currents in the environment is a ubiquitous renewable energy source. The traditional flow energy power generation technology mainly uses the fluid force to directly drive the turbine to rotate, so that the electromagnetic induction generator is used to generate electricity. This method of power generation requires high incoming flow velocity and complex structure, a...

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Problems solved by technology

[0006] In view of the deficiencies in the prior art, especially for the low efficiency of energy collection by the vortex-induced vibration power generation device and the narrow range of applicable incoming flow speeds, the present invention Provided is a device and method for collecting electric energy with simple structure design and high energy conversion efficiency using vortex-induced vibration around a double cone

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