CN102555357A - Interval constrained damping structure NVH (Noise, Vibration and Harshness) material for rail vehicle - Google Patents
Interval constrained damping structure NVH (Noise, Vibration and Harshness) material for rail vehicle Download PDFInfo
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- CN102555357A CN102555357A CN2012100026036A CN201210002603A CN102555357A CN 102555357 A CN102555357 A CN 102555357A CN 2012100026036 A CN2012100026036 A CN 2012100026036A CN 201210002603 A CN201210002603 A CN 201210002603A CN 102555357 A CN102555357 A CN 102555357A
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Abstract
The HVH problems of a rail vehicle, namely Noise, Vibration and Harshness, are generated in the running process of the rail vehicle. A material capable of effectively improving or solving the NVH problems is called a NVH material. The invention relates to an interval constrained damping structure NVH material for the rail vehicle, which comprises a decorative layer (1), a damping layer (2), an interval layer (3), a sound adsorption layer (4) and a bonding layer (5), wherein the decorative layer is a plane carrier and has microporosity; the damping layer comprises natural or synthetic rubber as the main ingredient; the interval layer is a hard board formed by various materials, however, the surface of the interval layer is of a through structure and the inside of the interval layer is of a honeycomb structure; the sound adsorption layer is formed by a non-woven material; and the bonding layer is a low melting point fiber film or a low melting point glue film. The interval constrained damping structure sound adsorption and insulation material can be tightly combined with a rigid body and is easy to implement spatial configuration processing.
Description
Technical field
The present invention relates to a kind ofly can effectively improve the noise (Noise) that occurs in the rail vehicle locomotive driving process, vibration (Vibration) and sound vibration roughness (Harshness); It is the spacing constraint damping structure material of rail vehicle locomotive " NVH " problem; Be used for rail vehicle spacing constraint damping structure NVH material and manufacturing approach thereof; This material can be widely used in the various rail vehicles, with the friction noise of the rotational noise that reduces engine and car body and road surface, windage generation.
Background technology
Along with speed promotes, the noise of train is also strengthening sharp.According to the kind and the route of transmission of noise source, can adopt the NVH material noise in the rail vehicle locomotive to be carried out denoising Processing through " separated, fall, inhale, subtract " 4 kinds of methods.The NVH material is used for not only can reducing noise jamming effectively in the rail vehicle locomotive, brings quiet comfortable environment to driver and crew, and can play the energy-saving heat preserving effect, reduces winter, two Ji Chenei Air conditioned times of summer, reduces energy resource consumption.
Summary of the invention
The objective of the invention is for a kind of used for rail vehicle NVH material is provided; Reduce noise in the car body; Improve the noise (Noise), vibration (Vibration) and sound vibration roughness (Harshness), i.e. rail vehicle locomotive " NVH " problem that occur in the rail vehicle locomotive driving process.
Another object of the present invention is for a kind of manufacturing approach of used for rail vehicle spacing constraint damping structure NVH material is provided, and the manufacturing approach of utilizing patent of the present invention to provide can produce " NVH " problem that can obviously improve the rail vehicle locomotive.
For reaching above-mentioned purpose, used for rail vehicle spacing constraint damping structure NVH material is a complex, and it comprises 5 layer materials such as decorative layer, damping layer, wall, absorbent treatment and adhered layer.
Give the NVH material aesthstic effect through decorative layer (1), play the decoration decoration function.Decorative layer can play short flannel for the surface that knitting, woven and non-woven worker's two skills form, and has color and pattern through arrangement later.
The function of damping layer (2) is: when the transmission of car body engine power is beated vehicle body body vibration, car body and the generation of roughness pavement friction car; Vibration and beat with the form of kinetic energy and noise through wall (3), absorbent treatment (4) and adhered layer (5) to driving the space transmission, damping material can be converted into the vibration that heat energy reduces driving space wall with kinetic energy.In spacing constraint damping structure NVH material, damping layer is the natural butyl rubber layer of 1 millimeter of thickness or isoprene rubber, the EP rubbers in the synthetic rubber.
The hard plate that wall (3) is formed by silica gel material, but its surfacing, and be permeable structures, there is honeycomb inside, and thickness is 3 millimeters.Wall surface through-hole diameter is 0.1～0.2 micron, and mean porosities is 90%～95%.
Absorbent treatment (4) is compound hot blast non-woven material, and it has multi-layered web to form through hot rolling.Absorbent treatment thickness is 3～5 millimeters, and average pore diameter is 0.4～0.6 micron, and porosity is 90%～95%.
Adhered layer (4) is the copolyamide film, and the low melting point binder resin is arranged on it, can fusion in the time of 125 ℃.Adhesive layer can cling the close car body that invests with spacing constraint damping structure NVH material under hot pressing function, itself and car body separation strength are greater than 1000 newton.
Used for rail vehicle spacing constraint damping structure NVH material comprises 5 layer materials such as decorative layer, damping layer, wall, absorbent treatment and adhered layer.Decorative layer, damping layer, wall, absorbent treatment and adhered layer be close adhesion between any two; Its adhesive bonding method can be divided into for 4 steps: the first step; Lay copolyamide film between decorative layer and damping layer; Three's order from top to bottom is damping layer, copolyamide film, decorative layer, and through hot press.Pressure is that 3000 newton, roller temperature are 150 ℃, and pressure rolling speed is 0.5 meter per second.After the pressure rolling, without the direct package of cooling.In second step, with decorative layer and the debatching of damping layer complex that the first step produces, the copolyamide film at width such as damping aspect laies stacks wall above the copolyamide film, and through hot press.Pressure is that 500 newton, roller temperature are 150 ℃, and pressure rolling speed is 1 meter per second.The 3rd step, lay copolyamide film between complex that decorative layer, damping layer, wall form and absorbent treatment, and through hot press, pressure is that 3000 newton, roller temperature are 150 ℃, pressure rolling speed is 1 meter per second.In the 4th step, the complex tiling with decorative layer, damping layer, wall, absorbent treatment form simultaneously paste adhered layer at absorbent treatment, and through hot press, pressure is that 100 newton, roller temperature are 135 ℃, and pressure rolling speed is 1 meter per second.According to rail vehicle locomotive " NVH " issue-resolution, spacing constraint damping structure NVH material is cut into the sound absorption sound-insulating member, same model parts are left concentratedly, and packing.
Description of drawings
Schematically provided the main example of implementer's formula of the present invention in the accompanying drawings, wherein,
Fig. 1, used for rail vehicle spacing constraint damping structure NVH material structure sketch map;
Fig. 2, rail vehicle locomotive luggage case interior trim is with the sound absorption sound-insulation member;
Fig. 3, rail vehicle locomotive carpet sound absorption sound-insulation member.
The specific embodiment
Example 1
Fig. 2 is first instantiation of the present invention, and rail vehicle locomotive luggage case interior trim is with the sound absorption sound-insulation member, and it is formed by automobile-used spacing constraint damping structure NVH materials processing.Decorative layer is the acupuncture leather base fabric, and thickness is 2 millimeters, and material is a polyster fibre, and color is a grey black, through flame-proof treatment.Damping layer is a natural butyl rubber, and thickness is 1 millimeter.Wall is a synthesized silicon rubber, and thickness is 3 millimeters, and pitch-row is 2 millimeters, and the aperture is 0.2 micron, and specific area is 750 square metres of every grams, and pore volume is 0.35 milliliter of every gram, and porosity is 95%.Absorbent treatment is compound hot blast non-woven material, and thickness is 5 millimeters, and average pore diameter is 0.4 micron, and porosity is 90%.Adhered layer copolyamide film can fusion in the time of 125 ℃.5 layer materials such as decorative layer, damping layer, wall, absorbent treatment and adhered layer.Decorative layer, damping layer, wall, absorbent treatment and adhered layer be close adhesion between any two; Its adhesive bonding method can be divided into for 4 steps: the first step; Lay copolyamide film between decorative layer and damping layer; Three's order from top to bottom is damping layer, copolyamide film, decorative layer, and through hot press.Pressure is that 3000 newton, roller temperature are 150 ℃, and pressure rolling speed is 0.5 meter per second.After the pressure rolling, without the direct package of cooling.In second step, with decorative layer and the debatching of damping layer complex that the first step produces, the copolyamide film at width such as damping aspect laies stacks wall above the copolyamide film, and through hot press.Pressure is that 500 newton, roller temperature are 150 ℃, and pressure rolling speed is 1 meter per second.The 3rd step, lay copolyamide film between complex that decorative layer, damping layer, wall form and absorbent treatment, and through hot press, pressure is that 3000 newton, roller temperature are 150 ℃, pressure rolling speed is 1 meter per second.In the 4th step, the complex tiling with decorative layer, damping layer, wall, absorbent treatment form simultaneously paste adhered layer at absorbent treatment, and through hot press, pressure is that 100 newton, roller temperature are 135 ℃, and pressure rolling speed is 1 meter per second.Spacing constraint damping structure NVH material is cut, and it is shown in Figure 2 that it is become.
Example 2
Fig. 3 is second instantiation of the present invention, rail vehicle motorcycle track vehicle locomotive carpet sound absorption sound-insulation member, and it is formed by automobile-used spacing constraint damping structure NVH materials processing.Decorative layer is a needled punched nonwoven material, and thickness is 3.5 millimeters, and material is a polyster fibre, and color is a grey black, through flame-proof treatment.Damping layer is a natural butyl rubber, and thickness is 1 millimeter.Wall is a synthesized silicon rubber, and thickness is 3 millimeters, and pitch-row is 2 millimeters, and the aperture is 0.2 micron, and specific area is 750 square metres of every grams, and pore volume is 0.35 milliliter of every gram, and porosity is 95%.Absorbent treatment is compound hot blast non-woven material, and thickness is 6.5 millimeters, and average pore diameter is 0.4 micron, and porosity is 95%.Adhered layer copolyamide film can fusion in the time of 125 ℃.5 layer materials such as decorative layer, damping layer, wall, absorbent treatment and adhered layer.Decorative layer, damping layer, wall, absorbent treatment and adhered layer be close adhesion between any two; Its adhesive bonding method can be divided into for 4 steps: the first step; Lay copolyamide film between decorative layer and damping layer; Three's order from top to bottom is damping layer, copolyamide film, decorative layer, and through hot press.Pressure is that 3000 newton, roller temperature are 150 ℃, and pressure rolling speed is 0.5 meter per second.After the pressure rolling, without the direct package of cooling.In second step, with decorative layer and the debatching of damping layer complex that the first step produces, the copolyamide film at width such as damping aspect laies stacks wall above the copolyamide film, and through hot press.Pressure is that 500 newton, roller temperature are 150 ℃, and pressure rolling speed is 1 meter per second.The 3rd step, lay copolyamide film between complex that decorative layer, damping layer, wall form and absorbent treatment, and through hot press, pressure is that 3000 newton, roller temperature are 150 ℃, pressure rolling speed is 1 meter per second.In the 4th step, the complex tiling with decorative layer, damping layer, wall, absorbent treatment form simultaneously paste adhered layer at absorbent treatment, and through hot press, pressure is that 100 newton, roller temperature are 135 ℃, and pressure rolling speed is 1 meter per second.Spacing constraint damping structure NVH material is cut, and it is shown in Figure 3 that it is become.
Claims (8)
1. used for rail vehicle spacing constraint damping structure NVH material is the complex of 5 layer materials such as decorative layer, damping layer, wall, absorbent treatment and adhered layer, and the combination order of 5 layer materials is as shown in Figure 1.Wherein, decorative layer is characterised in that the decorative layer of this NVH material is woven fabric, knitted fabric, needled punched nonwoven material or leather, in being used for car bodies such as car roof, door-plate inboard and boot, during visible position, can print and dye and flame-proof treatment.Simultaneously, decorative layer can be combined closely through the method for physics or chemistry with damping layer.
2. according to claim 1, when decorative layer printing and dyeing during with flame-proof treatment, dyestuff, fire retardant and auxiliary agent reach or be higher than " international ecological spin textile standards 100 general with technical conditions versions especially: 2010 editions " requirement.According to claim 1, when decorative layer combined with damping layer, both separation strengths should be greater than 1000 newton.
3. according to claim 1; Spacing constraint damping structure NVH material should comprise the damping layer that is made up of damping material; Wherein, The function of damping material is: when the transmission of car body engine power produces vehicle body body vibration, car body and roughness pavement friction car to beat, vibrate and beat the form with kinetic energy and noise is transmitted to driving the space through wall, absorbent treatment and adhered layer, damping material can be converted into the vibration that heat energy reduces driving space wall with kinetic energy.In spacing constraint damping structure NVH material, damping layer is natural butyl rubber or the isoprene rubber in the synthetic rubber, the EP rubbers of 1 millimeter of thickness.
4. according to claim 1, spacing constraint damping structure NVH material should comprise wall, the flexible board that it is formed by silica gel material, but its surfacing, and be permeable structures, there is honeycomb inside, and thickness is 3 millimeters.Wall surface through-hole diameter is 0.1～0.2 micron, and pitch-row is 2～3 millimeters, and specific area is 700～800 square metres of every grams, and pore volume is 0.3～0.5 milliliter of every gram, and mean porosities is 90%～95%.
5. according to claim 1 and claim 4, wall should be between damping layer and absorbent treatment, and combines closely with both.Put two-layer low-melting-point copolyamides film on the two-layer aspect upper berth that contacts with wall of damping layer and absorbent treatment, can fusion in the time of 125 ℃.Under the molten condition, make damping layer, absorbent treatment and wall combine closely, form whole through the pressure effect.
6. according to claim 1 and claim 5, spacing constraint damping structure NVH material should comprise absorbent treatment, and it is between damping layer and adhered layer.Absorbent treatment is compound hot blast non-woven material, and it has multi-layered web to form through hot rolling.Absorbent treatment thickness is 3～5 millimeters, and average pore diameter is 0.4～0.6 micron, and porosity is 90%～95%.
7. according to claim 1 and claim 6, spacing constraint damping structure NVH material should comprise adhered layer, it is characterized in that adhered layer can cling the close car body that invests with spacing constraint damping structure NVH material, and itself and car body separation strength are greater than 1000 newton.At adhered layer is the polypropylene fibre film, handles the resin binder that forms by passing through to select slurry on it, can fusion in the time of 125 ℃.
8. according to claim 1,2,3,4,5,6 and 7, in spacing constraint damping structure NVH forming materials process, need need bond through adhesive or bonding film between each layer simultaneously to the decorative layer arrangement of printing and dyeing.Therefore, in spacing constraint damping structure NVH material, used dyestuff, fire retardant, adhesive and finishing auxiliaries must reach or be higher than " international ecological textile standards 100 general and special technical conditions versions: 2010 editions " requirement.When " international ecological textile standards 100 general and special technical conditions " redaction issue, reach the redaction requirement.
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| CN2012100026036A CN102555357A (en) | 2012-01-06 | 2012-01-06 | Interval constrained damping structure NVH (Noise, Vibration and Harshness) material for rail vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102555358A (en) * | 2012-01-06 | 2012-07-11 | 江南大学 | Interval constrained damping structure sound adsorption and insulation material for rail vehicle |
| CN104071092A (en) * | 2013-03-26 | 2014-10-01 | 南车青岛四方机车车辆股份有限公司 | Layered composite light acoustical material for rail train |
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| CN102568467A (en) * | 2012-01-06 | 2012-07-11 | 江南大学 | Automotive sound absorption and insulation material with interval restraining and damping structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102555358A (en) * | 2012-01-06 | 2012-07-11 | 江南大学 | Interval constrained damping structure sound adsorption and insulation material for rail vehicle |
| CN104071092A (en) * | 2013-03-26 | 2014-10-01 | 南车青岛四方机车车辆股份有限公司 | Layered composite light acoustical material for rail train |
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Application publication date: 20120711 |