An integrated device for vibration absorption and vibration energy collection

Abstract

The invention relates to an integrated device for vibration absorption and vibration energy collection, which relates to the technical field of vibration control and energy collection. The device of the invention comprises a dynamic vibration absorber with adjustable stiffness and a vibration energy collecting module. The rigidity adjustable dynamic vibration absorber consists of an elastic element 4, an adjustable depth bolt 1 and a mass 7; The vibration energy acquisition module is composed of a PVDF piezoelectric thin film power generation element 3, an energy acquisition interface circuit8 and a load 9. The adjustable depth bolt 1 fastens the resilient element 4 by means of the M6 nut 2; The mass 7 can be fastened to both ends of the resilient element 4 by means of connecting bolts 5and M4 nuts 6; The PVDF piezoelectric thin film power generation element 3 is attached to the upper and lower surfaces of the elastic element 4, and is connected to an energy collection interface circuit 8 through two wires, and the other end of the energy collection interface circuit 8 is connected to a load 9. The invention makes up for the shortcomings of poor vibration damping effect of the passive vibration absorber, the limitation of application occasions, the narrow frequency band and the like, fully and effectively utilizes the vibration energy, and realizes the integration of the vibration control and the energy collection.

Description

technical field [0001] The invention relates to the technical field of vibration control and energy collection, in particular to an integrated device for vibration absorption and vibration energy collection with variable stiffness. Background technique [0002] Dynamic vibration absorbers have the advantages of simple structure, stable performance, good economy, and low maintenance costs, and are widely used in the vibration control fields of mechanical engineering, marine engineering, civil engineering, automotive engineering and other structures. The principle of the dynamic vibration absorber is that when the vibration system is excited to vibrate, the additional dynamic vibration absorber exerts a force on the vibration system. By designing the stiffness and quality of the dynamic vibration absorber, the natural frequency of the system is equal to the frequency of the external excitation force, and finally the control is realized. The resonance purpose of the original sy...

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Problems solved by technology

[0006] Aiming at the disadvantages of non-adjustable frequency and waste of vibration energy of existing passive dynamic vibration absorbers, the purpose of the present invention is to provide an integrated device for vibration absorption and vibration energy collection, which can solve the problems of poor vibration reduction effect, limited application occasions, and wide frequency band of passive vibration absorbers. At the same time, the vibration energy is fully and effectively used to realize the integration of vibration control and energy collection

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