A Wind-Induced Vibration Energy Harvester Based on Multi-Cylinder Wake Excitation
An energy harvester and wind-induced vibration technology, which is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of high wind speed and rigidity requirements for vibration, and achieve improved Effects of energy collection efficiency, improvement of utilization rate, and guarantee of disassembly
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Embodiment 1
[0027] refer to figure 1 , figure 2 and Figure 5 , in order to solve the problems of the existing wind-induced vibration piezoelectric generator with complex structure, low output voltage, low power density, and single flow direction, the present invention provides a wind-induced vibration energy harvester based on multi-cylindrical wake excitation, It includes an external frame column 1, a central column 2, a piezoelectric transducer 3, a contact spring 4, and a frame rod 5; the external frame column 1 is not less than three, and the frame rod 5 connects the upper end of the external frame column 1 and the The lower ends are fixedly connected in pairs to form a cubic external frame structure; the central column 2 is located at the geometric center of the cubic external frame structure, and the central column 2 is arranged in parallel with the external frame column 1, and the central column 2 is slightly shorter than the external frame column 1; One end of the contact spri...
Embodiment 2
[0033]The difference from the above embodiment is that the number of fixed piezoelectric transducers 3 between the central column 2 and the outer frame column 1 changes; the piezoelectric transducers 3 are not necessarily along the four diagonal directions. Limited to 1, but could be 2 or 3. Its characteristic is that the wind load acts on the outer frame column 1, forming a Karman vortex street in the wake, and the vortex street acts on the central cylinder 2, causing the wake excitation of the central cylinder 2 to drive the deformation of the piezoelectric transducer 3 and output voltage . At the same time, the connection between the central column 2 and the outer frame column 1 changes as the number of piezoelectric transducers 3 changes.
Embodiment 3
[0035] The difference from the above-mentioned embodiments is that the cross-sectional shape of the thin rod 6 fixedly connected with the piezoelectric transducer 3 can be circular, rectangular or trapezoidal. Corresponding parts of the central column 2 and the outer frame column 1 reserve a through groove 7 consistent with the size of the thin rod 6 for fixing the thin rod 6 . Its characteristic is that the thin rod 6 fixedly connected with the piezoelectric transducer 3 can be well combined with the central cylinder 2 and the outer frame column 1 under the premise of not changing the outer surface shape of the central cylinder 2 as much as possible, and the piezoelectric transducer 3. Minimize the impact on the central cylinder 2 external wind field.
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