Magnetorheological vibration isolating device based on piezoelectric energy self collection

A self-harvesting, magneto-rheological technology, applied in the direction of earthquake resistance, building components, etc., can solve problems such as device unreliability and complex structure

Inactive Publication Date: 2011-08-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problem that the existing magneto-rheological shock-isolating device based on sensor and control power supply increases the unreliability of the device due to its complex structure, and proposes a magneto-rheological isolation device based on piezoelectric self-collection shock device

Method used

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  • Magnetorheological vibration isolating device based on piezoelectric energy self collection
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  • Magnetorheological vibration isolating device based on piezoelectric energy self collection

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specific Embodiment approach 1

[0016] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment includes the magneto-rheological damper 1 and the rubber shock-isolating pad 3 arranged between the main body of the building structure and the foundation, it also includes a piezoelectric generator 2, the relative displacement between the foundation and the main structure or The relative speed makes the piezoelectric generator 2 generate electric energy, and the electric energy causes the damping force generated by the magnetorheological damper 1 to dissipate energy, and the current output terminal of the piezoelectric generator 2 is connected to the current input terminal of the magnetorheological damper 1. The shock-isolation device of the invention can be placed between the foundation and the main structure (base shock-isolation), and can also be placed between the bottom or the substructure and the superstructure (floor shock-isolation). Through the relative displacement b...

specific Embodiment approach 2

[0018] Specific implementation mode two: combination Figure 4 , Figure 9 The present embodiment will be described. The piezoelectric generator 2 of the present embodiment adopts a piezoelectric stack structure. Other components and connections are the same as those in Embodiment 1.

[0019] The piezoelectric stack structure uses piezoelectric sheets 3 and electrodes 4 alternately arranged in separate layers. The principle is to use the d33 mode of the piezoelectric material. When an external force is applied to both ends of the structure, the deformation of the piezoelectric sheet is caused to generate a voltage. Due to the low power generation of the single-layer structure, the piezoelectric stack structure is formed by mixing and stacking multi-layer piezoelectric sheets and electrodes, and in practice, the array of piezoelectric stacks is used to greatly increase the power generation.

specific Embodiment approach 3

[0020] Specific implementation mode three: combination Figure 5 , Image 6 This embodiment will be described. The difference between this embodiment and Embodiment 2 is that the piezoelectric generator 2 adopts a cantilever beam structure. Other components and connections are the same as those in Embodiment 1.

[0021] In the cantilever beam structure, on both sides of the substrate 6, a multi-layer film structure 8 with piezoelectric films and electrode interlayers is arranged. When the building structure moves in an earthquake, the excitation plate 5 pushes the substrate 6 so that the piezoelectric cantilever beam structure The initial displacement, this deformation and subsequent free oscillation of the mass 7 causes the thin film structure 8 covered on the surface of the cantilever to generate electrical energy. Since the power generation of a single cantilever beam structure is not enough to supply the magneto-rheological damper, an array structure of cantilever beam s...

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Abstract

A magnetorheological vibration isolating device based on piezoelectric energy self collection relates to a vibration isolating device for a builder and solves the problem of unreliability of the device caused by the complicated structure of the existing magnetorheological vibration isolating device based on a sensor and a control power supply. The magnetorheological vibration isolating device based on piezoelectric energy self collection comprises a magnetorheological damper, a vibration isolating cushion and a piezoelectricity generating device, wherein the piezoelectricity generating device generates electric energy which enables the damping force generated by the magnetorheological damper to dissipate energy; the current output end of the piezoelectricity generating device is connected at the current inlet end of the magnetorheological damper; the piezoelectricity generating device converts the vibration energy in an earthquake to electric energy, not only ensures energy supply for the magnetorheological damper, but also makes full use of the earthquake energy so as to realize earthquake control by the earthquake, a complete set of magnetorheological device can adjust the magnitude of the output force of the damper in a self-adaptive way and be used for earthquake proof construction.

Description

technical field [0001] The invention relates to a seismic isolation device for buildings. Background technique [0002] Seismic isolation structure generally refers to a building structure in which a seismic isolation layer with overall reset function is set between the foundation, bottom or substructure and the superstructure of the house, which is composed of rubber seismic isolation bearings and damping devices. It can be divided into two forms: Base isolation structure (isolation layer is set between the upper structure of the building and the foundation), layer isolation structure (isolation layer is set between the bottom or the lower structure and the upper structure) and the composite structure of the two. [0003] The seismic isolation layer can dissipate most of the seismic energy through plastic deformation and damping, thereby reducing the energy input to the upper structure. Compared with the traditional anti-seismic structure that uses the plastic deformation ...

Claims

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Application Information

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IPC IPC(8): E04B1/98
Inventor 关新春黄永虎李惠
Owner HARBIN INST OF TECH
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