A kind of constrained damping noise reduction plate and its preparation method

A technology of constrained damping and noise reduction boards, applied in chemical instruments and methods, lamination, layered products, etc., can solve the problems of pore distribution affecting wheel imbalance, smaller bonding area, and high processing costs, and achieve good results Weather resistance, large bonding area, and good balance

Active Publication Date: 2017-11-14
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the noise reduction disc needs to have multiple holes on the damping layer and the constraining layer. Although this process can absorb sound waves and reduce the weight of the constraining layer, the processing cost is high, and the overall bonding area between the noise reduction disc and the wheel becomes smaller , the safety is reduced. In addition, the uneven distribution of pores will also affect the overall imbalance of the wheel.

Method used

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  • A kind of constrained damping noise reduction plate and its preparation method
  • A kind of constrained damping noise reduction plate and its preparation method
  • A kind of constrained damping noise reduction plate and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Preparation of the noise reduction board of the present invention

[0035] 1. Raw materials:

[0036] Steel plate (constrained layer), with an area of ​​800mm*800mm and a thickness of 2mm;

[0037] Polyurethane foam material (damping layer), with an area of ​​800mm*800mm and a thickness of 1.2mm;

[0038] Acrylate foam material (sound-absorbing layer), area 800mm*800mm, thickness 5mm, opening, pore diameter 0.5μm, porosity 30%; Adhesive: acrylate adhesive.

[0039] 2. Preparation method:

[0040] (1) Clean the surface of the steel plate to make the surface of the steel plate dry without cleaning agent residue;

[0041] (2) Evenly brush the acrylate adhesive on the surface of the steel plate, paste the polyurethane foam material on the surface of the steel plate, turn over the steel plate after curing, brush the acrylate adhesive on the surface of the steel plate on the other side, and paste the acrylate foam material Paste on the surface of the steel...

Embodiment 2

[0043] Embodiment 2: Preparation of the noise reduction board of the present invention

[0044] 1. Raw materials:

[0045] Copper plate (constrained layer), with an area of ​​800mm*800mm and a thickness of 3mm;

[0046] Rubber foam material (damping layer), with an area of ​​800mm*800mm and a thickness of 3mm;

[0047] Foam metal material (sound-absorbing layer), area 800mm*800mm, thickness 10mm, opening, pore diameter 100μm, porosity 50%;

[0048] Adhesive: Acrylic adhesive.

[0049] 2. Preparation method:

[0050] (1) Clean the surface of the steel plate to make the surface of the steel plate dry without cleaning agent residue;

[0051] (2) Evenly brush the acrylate adhesive on the surface of the steel plate, paste the polyurethane foam material on the surface of the steel plate, turn over the steel plate after curing, brush the acrylate adhesive on the surface of the steel plate on the other side, and paste the acrylate foam material Paste on the surface of the steel p...

Embodiment 3

[0053] Embodiment 3: Performance test of the constrained damping type noise reduction panel of the present invention

[0054] The constrained damping noise reduction plate prepared above was installed on the surface of the wheel web, and the damping ratio and sound absorption coefficient of the whole (the wheel with the noise reduction plate) were tested.

[0055] (1) The impact of the constrained layer of the present invention, the damping layer and the thickness of the sound-absorbing layer on the damping ratio and the sound absorption coefficient is shown in Table 1;

[0056] Table 1: Influence of thickness of constrained layer, damping layer and sound-absorbing layer on damping ratio and sound absorption coefficient according to the present invention:

[0057]

[0058]

[0059] Aiming at the performance of the constrained damping type noise reduction board, the invention comprehensively considers the damping ratio, the sound absorption coefficient and the quality o...

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Abstract

The invention provides a constraint damping noise reduction plate which sequentially comprises a damping layer (1), a constraint layer (2) and a sound absorption layer (3). The damping layer and the constraint layer form a constraint damping structure which can effectively reduce vibration between wheel rails and vibration of wheel disks; the sound absorption layer covers the outer side of the constraint layer and can absorb noise generated by vibration generated in operation of the wheel rails; the damping layer and the constraint layer are covered from the wheel disks to wheel rims and are integrally and symmetrically bonded by taking a wheel axle as the center, the bonding area is large, and the equilibrium is good.

Description

technical field [0001] The invention belongs to the technical field of rail building materials, in particular, the invention relates to a constrained damping noise reduction plate for rail vehicles and a preparation method thereof. Background technique [0002] When the rail train wheels are in contact with the wheel rails, severe vibrations will be generated due to the unevenness of the wheel rails and other reasons. The existing methods for reducing wheel-rail vibration and vibration-damping technology have all carried out destructive transformation on the wheel itself, which will affect the stiffness of the wheel to varying degrees and cause hidden dangers to driving safety. [0003] The constrained damping material includes two parts: a damping layer and a constrained layer, and a layer of high-modulus ordinary elastic material layer is pasted on the damping material as the constrained layer. When the constrained damping structure vibrates, the viscoelastic damping mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B5/18B32B7/12B32B15/06B32B15/082B32B15/085B32B15/09B32B15/095B32B15/18B32B15/20B32B25/04B32B25/08B32B27/08B32B27/28B32B27/34B32B27/30B32B27/32B32B27/36B32B27/40B32B37/12B32B37/10
CPCB32B5/18B32B7/12B32B15/06B32B15/082B32B15/085B32B15/09B32B15/095B32B15/18B32B15/20B32B25/04B32B25/08B32B27/08B32B27/28B32B27/285B32B27/286B32B27/288B32B27/304B32B27/306B32B27/32B32B27/34B32B27/36B32B27/40B32B37/10B32B37/12B32B2266/0264B32B2266/0278B32B2266/045B32B2307/10B32B2307/71B32B2307/712B32B2307/714B32B2605/10
Inventor 毛昆朋徐超马运章张澎湃贾颖华张弘
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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