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Low-frequency vibration isolation and piezoelectric energy harvesting coupling device

A piezoelectric energy harvesting and coupling device technology, which is applied to piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, and vibration suppression adjustments, can solve the problems of low-frequency vibration energy collection and utilization, and achieve It can be applied in a variety of occasions, expand the range of energy collection, and the effect of simple and reasonable installation

Active Publication Date: 2019-08-30
BEIJING MUNICIPAL INST OF LABOUR PROTECTION +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are piezoelectric energy harvesters that convert vibration energy into electrical energy, but there is no related equipment for energy harvesting and utilization of low-frequency vibration.

Method used

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  • Low-frequency vibration isolation and piezoelectric energy harvesting coupling device
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  • Low-frequency vibration isolation and piezoelectric energy harvesting coupling device

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Embodiment Construction

[0022] The present invention will be further described in detail below in combination with specific embodiments.

[0023] Such as figure 1 , 2 As shown, the present invention is a low-frequency vibration isolation and piezoelectric energy harvesting coupling device, which is composed of a positive stiffness structure, a negative stiffness structure and a piezoelectric energy harvesting device. The invention combines the low-frequency vibration isolator with piezoelectric energy harvesting, converts the up and down vibration of the vibration isolator into the horizontal sliding of the slider 14, and drives the PVDF piezoelectric film to generate tension and compression deformation, thereby generating electric energy.

[0024] Such as image 3 As shown, the positive stiffness structure is composed of an upper plate 1 , a small sleeve 2 , a large sleeve 3 , a limit adjuster 4 , a vertical linear spring 5 and a lower plate 6 . The small sleeve 2 and the large sleeve 3 are respe...

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Abstract

The invention discloses a low-frequency vibration isolation and piezoelectric energy harvesting coupling device. The device is formed by a quasi-zero-stiffness low-frequency vibration isolator and a piezoelectric energy harvesting device. The quasi-zero-stiffness low-frequency vibration isolator applies a positive and negative stiffness parallel connection principle, and adopts a cam roller negative stiffness structure and a positive stiffness structure which are connected in parallel. The piezoelectric energy harvesting device is formed by coupling a PVDF piezoelectric film and a negative stiffness structure by applying a positive piezoelectric effect. The low-frequency vibration isolation and piezoelectric energy harvesting coupling device can collect and convert vibration energy which is not beneficial in life into available electric energy, and the positive and negative stiffness parallel connection can expand the vibration isolation frequency band, so that the low-frequency vibration isolation and piezoelectric energy harvesting coupling device has good vibration isolation and energy harvesting performance in a low-frequency range. The low-frequency vibration isolator is combined with the piezoelectric energy harvesting device, has double functions of vibration suppression and energy collection, has innovation compared with the prior art, is suitable for vibration isolation and energy harvesting in various situations, and has wide application prospect.

Description

technical field [0001] The invention relates to the field of vibration control and utilization, in particular to a low-frequency vibration isolation and piezoelectric energy harvesting coupling device, which can effectively isolate low-frequency vibration and convert vibration energy into electrical energy. The invention is formed by coupling a low-frequency vibration isolator and a piezoelectric energy harvesting device, which can effectively isolate low-frequency vibrations and convert vibration energy into electric energy. The structure is simple, reasonable and effective, and conforms to the concept of environmental protection and sustainable development. Background technique [0002] Vibration is one of the most common phenomena in nature. People cannot live without vibration. Basic physical phenomena such as sound, light, and heat in daily life contain vibration. Vibration is also widely used in modern society, but in most cases, vibration is considered a negative fact...

Claims

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Application Information

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IPC IPC(8): H02N2/18F16F15/00F16F15/04
CPCF16F15/007F16F15/04H02N2/186
Inventor 刘彦琦姚明辉周世康钱霙婧张伟
Owner BEIJING MUNICIPAL INST OF LABOUR PROTECTION
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