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Wheel using three-dimensional quasi photonic crystals to reduce vibration and noise

A phononic crystal, vibration reduction and noise reduction technology, applied in the direction of wheels, wheels characterized by rail running parts, vehicle parts, etc., can solve the problems of complex manufacturing process and insufficient safety, and achieve simple manufacturing process and high safety performance, the effect of suppressing vibration

Pending Publication Date: 2018-06-01
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the vibration and noise generated by the wheels account for a large part of the total vibration and noise generated by the railway. However, the existing damping wheels and elastic wheels have the disadvantages of complicated manufacturing process and insufficient safety, which cannot meet the rapid and safe requirements of the railway. Therefore, it is urgent to propose an effective, safe and easy-to-implement vibration and noise reduction wheel

Method used

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  • Wheel using three-dimensional quasi photonic crystals to reduce vibration and noise
  • Wheel using three-dimensional quasi photonic crystals to reduce vibration and noise
  • Wheel using three-dimensional quasi photonic crystals to reduce vibration and noise

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: as figure 1 , 2 As shown, this embodiment specifically relates to a wheel that utilizes a three-dimensional quasi-phonon crystal for vibration and noise reduction. The wheel 1 includes a hub 2, a rim 3, and a web 4; between; the outer edge of the rim 3 is a tread, and the edge of the tread is provided with a raised rim 5; and eight three-dimensional quasi-phononic crystals 6 are arranged on the outer surface of the web 4.

[0023] Such as figure 1 , 2 As shown, the three-dimensional quasi-phononic crystal 6 is in the shape of a hexagonal prism, and eight holes 7 matching the three-dimensional quasi-phononic crystal 6 are provided on the outer surface of the web 4; the holes 7 do not pass through the web 4, and each A three-dimensional quasi-phononic crystal 6 is inserted in a hole 7; a cover plate 8 is also provided on the outer surface of the web 4, and the cover plate 8 is fixedly connected with the web 4 by bolts; one end of the three-dimensional qua...

Embodiment 2

[0028] Embodiment 2: as Figures 1 to 3 As shown, in this embodiment, the arrangement of the first phononic crystal unit 9 a and the second phononic crystal unit 9 b is the same as that in Embodiment 1; the difference between the two lies in the structure of the phononic crystal unit 9 .

[0029] In this embodiment, the first phononic crystal unit 9a includes a piezoelectric ceramic core material and a metal film disposed on the surface of the piezoelectric ceramic core material; the metal film is a pure copper film, and the metal film is prepared on the piezoelectric ceramics The surface of the core material; when the elastic wave propagates to the first phononic crystal unit 9a, the piezoelectric ceramic core material will vibrate under the action of the elastic wave, and convert part of the vibration energy into electrical energy, which is arranged on the surface of the piezoelectric ceramic core material The metal film on the surface of the piezoelectric ceramic can immedi...

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PUM

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Abstract

The invention discloses a wheel using three-dimensional quasi photonic crystals to reduce vibration and noise. The wheel comprises a hub, a rim and a wheel disk connected between the hub and the rim,wherein multiple three-dimensional quasi photonic crystals are mounted on the wheel disk; the three-dimensional quasi photonic crystals are spliced by at least two photonic crystal units. The wheel has the advantages that for the vibration above 1000Hz, the three-dimensional quasi photonic crystals at the wheel disk have the features of an elastic wave forbidding band and can effectively inhibit the vibration of the wheel disk, and accordingly radiation noise can be controlled; accordingly, the wheel has a good reduction effect on the medium- and high-frequency vibration and noise above 1000Hz.

Description

technical field [0001] The invention relates to a vibration-reduction and noise-reduction wheel, in particular to a vibration-reduction and noise-reduction wheel utilizing a three-dimensional quasi-phonon crystal. Background technique [0002] With the rapid development of my country's economy, people's travel needs are increasing day by day. High-speed railway and rail transit have become one of the main modes of transportation in China, and have played a pivotal role in my country's economic development and the improvement of people's living standards. While our country is building high-speed railways and urban rail transit and increasing the speed of trains, it has brought great convenience to people's daily travel and greatly shortened the distance between cities. However, it also has a very adverse impact on people's lives. The environmental vibration and noise problems brought about by the operation of high-speed railways and urban rail transits have increasingly attra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60B17/00
CPCB60B17/0024
Inventor 冯青松孙魁黎子荣王威张思皓姜天缘
Owner EAST CHINA JIAOTONG UNIVERSITY
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