Railway vehicle cavity damping sound absorption and noise reduction structure

Abstract

The utility model relates to a cavity damping, sound absorption and noise reduction structure of a railway vehicle, and belongs to noise reduction structures of railway vehicles. The vehicle body cavity comprises a cavity with the wedge direction facing the outside of the vehicle and a cavity with the wedge direction facing the inside of the vehicle, and the damping sound absorption assembly is integrally installed in the cavity with the wedge direction facing the outside of the vehicle in a penetrating mode. The noise reduction device has the advantages that the structure is novel, the combination of three noise reduction modes of the damping patch, the sound absorption foam and the wedge-shaped filling direction is adopted, the damping performance is improved by adding the damping patch, and compared with traditional foam, the density of the sound absorption foam is increased, the aperture is reduced, the sound absorption performance can be better improved, and the noise reduction effect is better. The sound absorption wedge can be formed more easily by filling according to the wedge direction, the filling amount is reduced, and the cost is saved; space is fully utilized, the overall space structure of an existing vehicle body is utilized, the overall noise reduction performance is improved under the condition that the space of fireproof materials and heat preservation materials is not occupied, and the overall noise reduction effect of the railway vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the noise reduction structure of rail vehicle, especially relates to a rail vehicle cavity damping sound absorption noise reduction structure. BACKGROUND

[0002] With people's consciousness of the comfort of rail vehicle gradually strengthens, the demand of noise reduction of vehicle is also higher and higher, but due to the limited space of the existing structure, mainly occupied by fireproof material and thermal insulation material, under the requirement of guaranteeing the fireproof and thermal insulation of vehicle, the space left for noise reduction material cannot meet the requirement of giving people comfort.

[0003] At present, due to the space reason, the rail train has no more position to install the noise reduction material, for this, Chinese patent 'a method for compressing and filling foam' with announcement number CN 104214268 B provides a method for filling compressed foam in the cavity of the vehicle body, that is, the compressed foam is directly put into the cavity, and the cavity is filled with foam by self-expansion, and the installation of noise reduction material is completed. Figure 2 And Figure 3 As shown in the patent announcement of 'a method for compressing and filling foam', the foam fills all the cavities in the cavity of the vehicle body, that is, the foam fills the cavity regardless of the section of the cavity, the overall sound insulation amount is 43.4 dB when no noise reduction material is added in the cavity, and the overall sound insulation amount is 44.7 dB when the cavity foam is added in the cavity, which can improve the overall sound insulation amount by 1.3 dB, although it is improved, but still cannot meet the need of noise reduction, and the filling amount is large, which leads to the increase of cost. SUMMARY

[0004] The utility model provides a kind of rail vehicle cavity damping sound absorption noise reduction structure, to solve the problem of noise reduction effect to be improved, filling amount is large and cost is high in the cavity of the vehicle body filled with foam at present.

[0005] The technical scheme adopted by the utility model is, including vehicle body cavity and damping sound absorption component, wherein the vehicle body cavity includes the cavity of the direction of wedge towards outside the vehicle and the cavity of the direction of wedge towards inside the vehicle, and the damping sound absorption component is integrally penetrated and installed in the cavity of the direction of wedge towards outside the vehicle.

[0006] The damping sound absorption component is in the state of vacuumizing inside before installation, so as to be installed in compressed state, and the vacuum state is destroyed after installation, so as to be filled in expanded state.

[0007] The vehicle body cavity includes the cavity of the direction of wedge towards outside the vehicle, the cavity of the direction of wedge towards inside the vehicle, the inside plate and the outside plate, wherein there is the cavity of the direction of wedge towards outside the vehicle and the cavity of the direction of wedge towards inside the vehicle between the inside plate and the outside plate.

[0008] The damping sound-absorption assembly includes a vacuum film bag, a damping patch, sound-absorption foam and a vacuum conduit, the damping patch is respectively bonded on edge one and edge two on both sides of the sound-absorption foam in a sharp direction angle α, the vacuum conduit is located at the center of the sound-absorption foam, and the vacuum film bag is wrapped outside the damping patch and the sound-absorption foam.

[0009] The length of the damping patch is same as the length of the sound-absorption foam.

[0010] The number of the damping patches bonded on both sides of the sound-absorption foam is same.

[0011] The number of the damping patches on each side is 1-4 pieces.

[0012] The number of the damping patches on each side is 3 pieces.

[0013] The damping patch includes a damping layer and a steel sheet layer, one side of the damping layer and the steel sheet layer is bonded, and the other side of the steel sheet layer is used for bonding with the surface of the sound-absorption foam.

[0014] The density of the sound-absorption foam is 45-50 kg / m 3 , and the aperture is 0.5-1.0 mm.

[0015] The damping patch, the sound-absorption foam and the sharp direction filling direction are combined, the damping performance is increased by adding the damping patch, the sound-absorption foam increases the density and reduces the aperture compared with the traditional foam, the sound-absorption performance can be better improved, the sound-absorption sharp is more easily formed by filling in the sharp direction, the filling amount is reduced, and the cost is saved; the space is fully utilized, the overall noise reduction performance is improved without occupying the space of the fireproof material and the thermal insulation material by utilizing the space structure of the existing vehicle body, the overall sound insulation amount is 47.0 dB through testing, the overall sound insulation amount is obviously improved, the overall noise reduction effect of the railway vehicle is greatly improved by being applied in the vehicle body chassis, the side wall and the grid top cavity. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the utility model;

[0017] Figure 2 is a structural schematic view of the vehicle body cavity of the utility model;

[0018] Figure 3 is a structural schematic view of the damping sound-absorption assembly of the utility model;

[0019] Figure 4 is an explosion view of the damping sound-absorption assembly of the utility model;

[0020] Figure 5 It is the structural schematic diagram of the damping patch of the utility model. DETAILED DESCRIPTION

[0021] Referring to Figure 1 , including the car body cavity 1 and the damping sound absorption assembly 2, wherein the car body cavity 1 includes the cavity 101 of the direction of the wedge towards the outside of the car and the cavity 102 of the direction of the wedge towards the inside of the car, and the damping sound absorption assembly 2 is integrally installed in the cavity 101 of the direction of the wedge towards the outside of the car.

[0022] The damping sound absorption assembly 2 is in the state of vacuumizing its inside before installation, so that it is installed in the compressed state, and after installation, the vacuum state is destroyed, so that it is filled in the expanded state.

[0023] Referring to Figure 2 , the car body cavity 1 includes the cavity 101 of the direction of the wedge towards the outside of the car, the cavity 102 of the direction of the wedge towards the inside of the car, the inside plate 103 and the outside plate 104, wherein between the inside plate 103 and the outside plate 104, there are the cavity 101 of the direction of the wedge towards the outside of the car and the cavity 102 of the direction of the wedge towards the inside of the car.

[0024] Referring to Figure 3 , 4 , the damping sound absorption assembly 2 includes the vacuum film bag 201, the damping patch 202, the sound absorption foam 203 and the vacuum conduit 204, the damping patch 202 is respectively bonded on the side one 20301 and the side two 20302 of the sound absorption foam 203 on both sides of the angle α of the direction of the wedge, the vacuum conduit 204 is located at the center of the sound absorption foam 203, and the vacuum film bag 201 is wrapped outside the damping patch 202 and the sound absorption foam 203.

[0025] The length of the damping patch 202 is same with the length of the sound absorption foam 203.

[0026] The number of the damping patch 202 bonded on both sides of the sound absorption foam 203 is same.

[0027] The number of the damping patch 202 on each side is 1-4 pieces.

[0028] The number of the damping patch 202 on each side is 3 pieces.

[0029] Referring to Figure 5 , the damping patch 202 includes the damping layer 20201 and the steel sheet layer 20202, one side of the damping layer 20201 and the steel sheet layer 20202 is bonded, and the other side of the steel sheet layer 20202 is used for bonding with the surface of the sound absorption foam 203.

[0030] The density of the sound absorption foam 203 is 45-50kg / m 3 , and the pore diameter is 0.5-1.0mm.

[0031] Working principle:

[0032] The steel sheet layer 20202 of the damping patch 202 is bonded with the sound-absorbing foam 203, the vacuum conduit 204 penetrates the sound-absorbing foam 203, and after completion, the vacuum film bag 201 is used for wrapping, the vacuum pump is connected with the vacuum conduit, vacuum compression is performed, and then after confirming the direction of the wedge of the vehicle body cavity, the whole damping sound-absorbing assembly is placed in the cavity 101 in the direction of the wedge towards the outside of the vehicle, the vacuum film bag is destroyed, the sound-absorbing foam releases pressure to make it and the damping patch fully contact with the inner wall of the cavity.

Claims

1. A rail vehicle cavity-damping sound-absorbing noise-reducing structure, characterized by: The vehicle body cavity includes a cavity directed outward and a cavity directed inward, and the damping sound-absorbing assembly is installed in the cavity directed outward.

2. The cavity-damping sound-absorbing noise-reducing structure of a rail vehicle according to claim 1, characterized in that: The damping sound-absorbing assembly is vacuumed before installation, so that it is installed in a compressed state, and the vacuum state is destroyed after installation, so that it is filled in an expanded state.

3. The cavity damping sound absorbing noise reduction structure of rail vehicle according to claim 1, characterized in that: The vehicle body cavity includes a cavity directed outward, a cavity directed inward, an inner panel and an outer panel, and the cavity directed outward and the cavity directed inward are between the inner panel and the outer panel.

4. The cavity damping sound absorbing noise reduction structure of rail vehicle according to claim 1, characterized in that: The damping sound-absorbing assembly includes a vacuum film bag, a damping patch, sound-absorbing foam and a vacuum conduit, the damping patch is respectively bonded to the side one and the side two of the sound-absorbing foam, the vacuum conduit is located at the center of the sound-absorbing foam, and the vacuum film bag is wrapped outside the damping patch and the sound-absorbing foam.

5. A rail vehicle cavity damped sound absorbing noise reducing structure according to claim 4, characterized in that: The length of the damping patch is the same as the length of the sound-absorbing foam.

6. The track vehicle cavity damped sound absorbing noise reducing structure of claim 4, wherein: The number of damping patches bonded to the two sides of the sound-absorbing foam is the same.

7. A rail vehicle cavity damped sound absorbing noise reducing structure according to claim 6, characterized in that: The number of damping patches on each side is 1-4.

8. The track vehicle cavity damped sound absorbing noise reducing structure of claim 7, wherein: The number of damping patches on each side is 3.

9. The track vehicle cavity damped sound absorbing noise reducing structure of claim 4, wherein: The damping patch includes a damping layer and a steel sheet layer, one side of which is bonded, and the other side of the steel sheet layer is used to bond with the surface of the sound-absorbing foam.

10. The track vehicle cavity damped sound absorbing noise reducing structure of claim 4, wherein: The density of the sound-absorbing foam is 45-50 kg / m 3 , and the pore size is 0.5-1.0 mm.

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