CN214273840U - Multilayer composite noise elimination air pipe - Google Patents

Abstract

The utility model provides a compound noise elimination air pipe of multilayer, including interior sound absorption pipe, it has the bloop to distribute on the interior sound absorption pipe, and the parcel has the cotton layer of sound absorption including on the sound absorption pipe, and the solid cover has outer sound absorption pipe on inhaling the cotton layer of sound, and interior sound absorption pipe is made with the compression plate that outer sound absorption pipe was sound absorbing material, sound absorbing material is PET fibre or is polypropylene plastics. The air pipe is arranged into a three-layer sound absorption structure, the sound absorption holes are formed in the inner sound absorption pipe, noise enters the sound absorption cotton layer through the sound absorption holes, and the closed outer sound absorption pipe is arranged outside the sound absorption cotton layer, so that the sound absorption and noise reduction effects are greatly improved; the inner sound absorption pipe and the outer sound absorption pipe are made of polyester fiber compression plates with strong plasticity, so that the adaptability of the utility model is improved, and the utilization rate of the installation space is improved; the utility model has the advantages of reasonable design, be convenient for production and assembly, the sound attenuation effect is good, strong adaptability.

Description

Multilayer composite noise elimination air pipe

Technical Field

The utility model relates to an automobile engine air inlet pipeline or vehicle air conditioner's ventilation pipeline, concretely relates to compound noise elimination air hose of multilayer.

Background

In an automobile engine, particularly a turbocharged engine, in order to reduce the hysteresis of a turbine, the size of the turbine is more and more miniaturized, and in order to achieve a sufficient supercharging effect, the operating speed of the turbine is more and more high, and when the linear velocity of the tip of the turbine exceeds the sonic velocity, sonic boom is generated, so that the turbine generates strong noise during operation, and the frequency of the noise is changed along with the change of the rotating speed of a turbine blade, so that the noise of the turbocharger is not only high in sound pressure value but also wide in frequency band. In addition, when the turbocharger receives a time difference from the stop of the command to the complete stop of the command, the pressure between the supercharged pipeline and the engine throttle valve can be rapidly increased, a pressure relief valve is arranged on the supercharger for pressure balance, and sharp air leakage sound can be generated when high-pressure air is discharged from the pressure relief valve. In addition to supercharger noise, three-cylinder engines are also beginning to be popular in passenger vehicles for weight reduction and fuel consumption reduction, and for four-stroke engines, the special operating conditions of three-cylinder engines can lead to engine vibration and low frequency combustion noise. The high frequency noise of the turbocharger and the low frequency noise of the three-cylinder engine occur simultaneously, and the air intake system is required to have corresponding capacity to effectively eliminate or reduce the noise so as to improve the comfort of passengers on the vehicle.

The patent number CN201721381416.8 discloses a composite noise reduction air inlet pipeline, which comprises an outer pipe, wherein the outer pipe is divided into a first half pipe and a second half pipe along the length direction, the first half pipe and the second half pipe are in sealed butt joint to form the outer pipe, the first half pipe is formed by a polyester fiber hot-pressing section bar, and the second half pipe is formed by a polyester fiber hot-pressing section bar or polypropylene plastic; the outer pipe is internally provided with a braided pipe which is coaxial with the outer pipe, the braided pipe comprises a spring-shaped keel and wires, and the wires are tightly braided on the keel to form the inner side surface and the outer side surface of the braided pipe. The scheme has a silencing effect, but the silencing effect is poor due to the limitation of the structural form; in addition, the braided tube has poor plasticity and can only be set into a circular tube or an elliptical tube, which results in poor space adaptability of the scheme. Along with the customer all promotes gradually to the travelling comfort requirement and the holistic compact requirement of car, urgently need a rational in infrastructure and noise cancelling effect good, the strong amortization air duct of plasticity.

SUMMERY OF THE UTILITY MODEL

To the demand among the prior art, the utility model provides a compound noise elimination air pipe of multilayer.

The utility model provides a compound noise elimination air pipe of multilayer, includes interior sound absorption pipe, it has the bloop to distribute on the interior sound absorption pipe the cotton layer of sound absorption has been wrapped up on the interior sound absorption pipe the fixed cover has outer sound absorption pipe on the cotton layer of sound absorption, interior sound absorption pipe and outer sound absorption pipe are sound absorbing material's compression plate and make.

Further: the sound-absorbing material is PET fiber or polypropylene plastic.

Further: the inner sound absorption pipe, the sound absorption cotton layer and the outer sound absorption pipe are respectively and correspondingly provided with a first drain hole, a second drain hole and a third drain hole, the first drain hole and the second drain hole are arranged in a superposition mode, the specification of the second drain hole is larger than that of the third drain hole, and the third drain hole is located in the middle of the second drain hole. First wash port and second wash port all are greater than the third wash port, prevent during the drainage that the internal sound absorption pipe that is located the drain port department soaks in aqueous and inhales moisture with inhaling the cotton layer of sound for a long time to influence the sound effect of inhaling of this scheme.

Further: the inner sound absorption pipe comprises a first half pipe and a second half pipe which are in sealed butt joint, welding ribs are distributed on a butt joint seam of the first half pipe and the second half pipe, and the welding ribs are arranged at intervals; the sound-absorbing cotton layer at the interval of the welding ribs is sunk in the gap between the adjacent welding ribs, so that the sound-absorbing cotton layer is stably wrapped on the inner sound-absorbing pipe and is axially fixed.

Further: the outer sound absorption pipe comprises a third half pipe and a fourth half pipe, the fourth half pipe comprises a first connecting part and a second connecting part which are integrally arranged, the third half pipe is in sealing butt joint with the first connecting part, and the inner sound absorption pipe and the sound absorption cotton layer are both positioned between the third half pipe and the first connecting part; the second connecting portion are in sealed butt joint with connecting half pipes, the inner ends of the connecting half pipes are in sealed fixed connection with the third half pipes, the outer ends of the connecting half pipes are in sealed fixed connection with air outlet pipes, and the second connecting portion are in sealed connection with the air outlet pipes. The area in the sound function district of inhaling of outer sound absorption pipe is increased to second connecting portion, increases to inhale the sound effect, connects half pipe and increases the connection structure intensity of this scheme gas outlet department.

Further: the corrugated pipe comprises an air inlet pipe and a corrugated pipe which are integrally connected, wherein a port of the corrugated pipe is attached and sleeved in an air inlet end port of the inner sound absorption pipe, arc-shaped clamping strips are distributed on the outer wall of the port of the corrugated pipe along the circumference of the corrugated pipe, and the arc-shaped clamping strips penetrate through the inner sound absorption pipe and the outer sound absorption pipe in sequence and are clamped on the inner sound absorption pipe and the outer sound absorption pipe. The corrugated pipe can play a role in absorbing vibration of the engine, avoids connection failure of the pipe body or the pipe body support and the opponent part caused by large-amplitude vibration when the engine is started, and prevents the vibration of the engine from being transmitted to the frame to form excitation noise.

The utility model has the advantages that: the air pipe is arranged into a three-layer sound absorption structure, the sound absorption holes are formed in the inner sound absorption pipe, noise enters the sound absorption cotton layer through the sound absorption holes, the sound absorption effect is improved, the closed outer sound absorption pipe is arranged outside the sound absorption cotton layer, the sound absorption effect is further improved, and the sound absorption and sound absorption effects are greatly improved; the inner sound absorption pipe and the outer sound absorption pipe are made of polyester fiber compression plates with strong plasticity, so that the adaptability of the utility model is improved, and the utilization rate of the installation space is improved; the utility model has the advantages of reasonable design, be convenient for production and assembly, the sound attenuation effect is good, strong adaptability.

Drawings

FIG. 1 is an exploded view of the structure of the present invention;

FIG. 2 is a schematic view of the external structure of the present invention;

fig. 3 is a schematic structural view of the middle connecting half pipe of the present invention.

In the figure, 2, a half pipe is connected; 21. an air outlet pipe; 3. an outer sound absorbing pipe; 31. a third drain hole; 32. a first connection portion; 33. a second connecting portion; 34. a third half pipe; 4. an inner sound absorption pipe; 41. welding ribs; 43. a silencing hole; 44. a first drain hole; 5. a sound absorbing cotton layer; 51. a second drain hole; 61. an air inlet pipe; 62. a bellows; 621. an arc-shaped clamping strip.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention. The terms of left, middle, right, upper and lower directions in the examples of the present invention are only relative concepts or reference to the normal use status of the product, and should not be considered as limiting.

The utility model provides a compound noise elimination air pipe of multilayer, as shown in fig. 1 and fig. 2, includes interior sound absorption pipe 4, it has bloop 43 to distribute on the interior sound absorption pipe 4 the parcel has the cotton layer of sound absorption 5 on the interior sound absorption pipe the solid cover has outer sound absorption pipe 3 on the cotton layer of sound absorption 5, interior sound absorption pipe 2 and outer sound absorption pipe 3 are the compression plate of sound absorbing material and make, sound absorbing material is PET fibre or is polypropylene plastics.

The inner sound absorption pipe 4, the sound absorption cotton layer 5 and the outer sound absorption pipe 3 are respectively and correspondingly provided with a first drain hole 44, a second drain hole 51 and a third drain hole 31, the first drain hole 44 and the second drain hole 51 are overlapped, the specification of the second drain hole 51 is larger than that of the third drain hole 31, and the third drain hole 31 is positioned in the middle of the second drain hole 51.

The inner sound absorption pipe 4 comprises a first half pipe and a second half pipe which are in sealed butt joint, welding ribs 41 are distributed on butt joints of the first half pipe and the second half pipe, and the welding ribs 41 are arranged at intervals. The outer sound absorption pipe 3 comprises a third half pipe 34 and a fourth half pipe, the fourth half pipe comprises a first connecting part 32 and a second connecting part 33 which are integrally arranged, the third half pipe 34 is in sealing butt joint with the first connecting part 32, and the inner sound absorption pipe 4 and the sound absorption cotton layer 5 are both positioned between the third half pipe 34 and the first connecting part 32; as shown in fig. 3, the second connecting portion 33 is connected to the connecting half-pipe 2 in a sealing and abutting manner, the inner end of the connecting half-pipe 2 is connected to the third half-pipe 34 in a sealing and fixed manner, the outer end of the connecting half-pipe 2 is connected to the air outlet pipe 21 in a sealing and fixed manner, and the second connecting portion 33 is connected to the air outlet pipe 21 in a sealing and fixed manner.

In addition, still include intake pipe 61 and bellows 62 of integrative connection, the port of bellows 62 pastes and cup joints in the intake end port of interior sound-absorbing pipe 4 the outer wall of bellows 62 port distributes along its circumference has arc card strip 621, arc card strip 621 runs through in proper order and the joint is in on interior sound-absorbing pipe 4 and outer sound-absorbing pipe 3.

The utility model discloses a theory of operation: the air gets into from the intake pipe the utility model discloses to get into the engine from outlet duct department, the noise gets into from outlet duct department the utility model discloses, the noise is in the utility model discloses interior through the hole that deadens, interior sound absorption pipe, inhale the cotton layer of sound and outer sound absorption pipe and handle and fall the back of making an uproar to discharge from intake pipe department.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a compound noise elimination air pipe of multilayer which characterized in that: the sound absorption structure comprises an inner sound absorption pipe, sound absorption holes are distributed in the inner sound absorption pipe, a sound absorption cotton layer is wrapped on the inner sound absorption pipe, an outer sound absorption pipe is fixedly sleeved on the sound absorption cotton layer, and the inner sound absorption pipe and the outer sound absorption pipe are made of compression plates made of sound absorption materials.

2. The multi-layer composite muffled air tube of claim 1, wherein: the sound-absorbing material is PET fiber or polypropylene plastic.

3. The multi-layer composite muffled air tube of claim 1, wherein: the inner sound absorption pipe, the sound absorption cotton layer and the outer sound absorption pipe are respectively and correspondingly provided with a first drain hole, a second drain hole and a third drain hole, the first drain hole and the second drain hole are arranged in a superposition mode, the specification of the second drain hole is larger than that of the third drain hole, and the third drain hole is located in the middle of the second drain hole.

4. The multi-layer composite muffled air tube of claim 1, wherein: the inner sound absorption pipe comprises a first half pipe and a second half pipe which are in sealed butt joint, welding ribs are distributed on butt joints of the first half pipe and the second half pipe, and the welding ribs are arranged at intervals.

5. The multi-layer composite muffled air tube of claim 1, wherein: the outer sound absorption pipe comprises a third half pipe and a fourth half pipe, the fourth half pipe comprises a first connecting part and a second connecting part which are integrally arranged, the third half pipe is in sealing butt joint with the first connecting part, and the inner sound absorption pipe and the sound absorption cotton layer are both positioned between the third half pipe and the first connecting part; the second connecting portion are in sealed butt joint with connecting half pipes, the inner ends of the connecting half pipes are in sealed fixed connection with the third half pipes, the outer ends of the connecting half pipes are in sealed fixed connection with air outlet pipes, and the second connecting portion are in sealed connection with the air outlet pipes.

6. The multi-layer composite muffled air tube of claim 1, wherein: the corrugated pipe comprises an air inlet pipe and a corrugated pipe which are integrally connected, wherein a port of the corrugated pipe is attached and sleeved in an air inlet end port of the inner sound absorption pipe, arc-shaped clamping strips are distributed on the outer wall of the port of the corrugated pipe along the circumference of the corrugated pipe, and the arc-shaped clamping strips penetrate through the inner sound absorption pipe and the outer sound absorption pipe in sequence and are clamped on the inner sound absorption pipe and the outer sound absorption pipe.

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