Broadband vortex-induced vibration piezoelectric energy collector installed on high-speed railway

A vortex-induced vibration and piezoelectric energy technology, which is applied in the fields of wind power generation and energy collection, can solve the problems of inappropriate energy collection of high-speed train tracks, and achieve the effect of providing energy collection bandwidth, simple structure and prolonging service life.

Inactive Publication Date: 2018-10-23
BEIJING UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above-mentioned patents and documents have less consideration for actual working conditions, and are not suitable for energy harvesting on high-speed train tracks. This patent is dedicated to improving the energy harvesting efficiency and conversion efficiency

Method used

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  • Broadband vortex-induced vibration piezoelectric energy collector installed on high-speed railway
  • Broadband vortex-induced vibration piezoelectric energy collector installed on high-speed railway
  • Broadband vortex-induced vibration piezoelectric energy collector installed on high-speed railway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The motion of each component is as follows figure 1 shown, figure 1 In the figure, the section line and the solid line are the piezoelectric energy harvester; the straight arrow represents the outside high-speed airflow entering the piezoelectric energy harvester; the rotating curved arrow represents the vortex excitation force; the curved double arrow represents the movement direction of the piezoelectric ceramic beam. from figure 1 The force form and working principle of the piezoelectric energy harvester can be seen in

[0064] figure 2 Half-section assembly drawing of the piezoelectric energy harvester, figure 2 (1) is the outer flare, (2) is the front inner chamber, (3) is the circuit module, (4) is the outer chamber, (5) is the fluid around the cylinder, (8) is the piezoelectric component, ( 9) is the rear inner chamber, (10) is a partition plate, (11) is a latch, (12) is a pressure relief door, and (13) is a spring. from figure 2 The main components of t...

Embodiment 2

[0073] The motion of each component is as follows figure 1 shown.

[0074] Figure 4 Half-section assembly drawing of piezoelectric energy harvester, Figure 5 Among them, (5) is the fluid around the cylinder, and (8) is the piezoelectric ceramic beam. from Figure 5 It can be seen that the piezoelectric energy harvester is designed with two cylindrical fluids and four sets of piezoelectric components.

[0075] Figure 5 It is a schematic diagram of the half-section three-dimensional structure of the piezoelectric energy harvester, from which the internal structure of the piezoelectric energy harvester can be seen.

[0076] Image 6 It is a three-dimensional schematic diagram of the inner chamber, from which the installation position and structural form of the piezoelectric ceramic beam can be seen.

[0077] Figure 7 It is a three-dimensional schematic diagram of the piezoelectric energy harvester, the solid line represents the external structure of the piezoelectric ...

Embodiment 3

[0083] The motion of each component is as follows figure 1 shown.

[0084] Figure 8 It is a schematic diagram of the half-section three-dimensional structure of the piezoelectric energy harvester. It can be seen from the figure that two sets of piezoelectric components are added in the middle position of the inner chamber (9).

[0085] Figure 9 Schematic diagram of a piezoelectric energy harvester. The solid line is the external structure of the piezoelectric energy harvester, and the dotted line is the internal structure of the piezoelectric energy harvester. The overall structure and layout of the piezoelectric energy harvester can be seen from the figure.

[0086]Compared with Example 2, the main difference is that the piezoelectric component (8) is installed in the downstream area of ​​the cylinder around the fluid (5), with the downstream centerline of the rear inner chamber (9) as the reference position. The piezoelectric component (8) is composed of a depressed c...

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Abstract

A broadband vortex-induced vibration piezoelectric energy collector installed on a high-speed railway belongs to the wind energy generating and energy acquisition technology field. The collector is characterized in that a high-speed airflow passes through a chamber installed with a cylindrical winding fluid and generates an eddy current in the downstream portion of the winding fluid; and the eddycurrent excites a piezoelectric plate / beam arranged by a cantilever to vibrate so as to generate electrical energy. The broadband vortex-induced vibration piezoelectric energy collector installed on the high-speed railway consists of an external flaring (1), a front inner chamber (2), a circuit module (3), an outer chamber (4), the cylindrical winding fluid (5), a piezoelectric component (8), a rear inner chamber (9), a separation plate (10), a bolt (11), a pressure release door (12) and a spring (13). In a high-speed instantaneous airflow environment, high-speed airflow energy and energy collection efficiency are effectively collected, a condition that damages are generated in a high-speed airflow environment or components fall off so that high-speed train driving is affected is effectively avoided, the structure is simple and maintenance is convenient.

Description

technical field [0001] The invention relates to a wind energy collector, in particular to a broadband vortex-induced vibration piezoelectric energy collector installed on a high-speed railway, and belongs to the technical field of wind energy generation and energy collection. Background technique [0002] During the "13th Five-Year Plan" period, the mileage of high-speed railways will reach 30,000 kilometers, and the mileage of new high-speed railways will reach 11,000 kilometers in the next five years, covering more than 80% of the cities. As the mileage of high-speed railways increases year by year, the speed of trains is constantly breaking world records. However, high-speed trains are high-energy-consuming means of transportation. Statistics show that the power of the EMU at a speed of 350 kilometers per hour is 8,800 kilowatts, or 16 kilowatts per capita; This does not include other major pollutants such as sulfur dioxide, nitrogen oxides, soot, etc., which are also ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
CPCH02N2/185H02N2/186
Inventor 曹东兴刘彦琦汪涛姚明辉张伟
Owner BEIJING UNIV OF TECH
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