CN216691216U

CN216691216U - Expanded quarter-wave tube silencing device, engine and passenger car

Info

Publication number: CN216691216U
Application number: CN202121581446.XU
Authority: CN
Inventors: 高振波; 黄显利; 李晨; 范志先; 刘鑫明; 谷文亮; 高一凡; 陈超
Original assignee: Zhongtong Bus Holding Co Ltd
Current assignee: Zhongtong Bus Holding Co Ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2022-06-07
Anticipated expiration: 2031-07-12

Abstract

The utility model provides an expansion type quarter-wave tube noise elimination device, which comprises an expansion type shell and a plurality of quarter-wave tubes, wherein the expansion type shell is provided with a plurality of grooves; the expansion type shell is cylindrical, and the quarter-wave tubes are uniformly distributed on the circular section in the expansion type shell; the utility model combines a plurality of quarter wave pipes and the expansion silencer to form a silencing structure, thereby achieving the purpose of weakening the intake and exhaust noise.

Description

Expanded quarter-wave tube silencing device, engine and passenger car

Technical Field

The utility model belongs to the technical field of noise reduction of passenger car engines, and particularly relates to an expansion type quarter-wave pipe noise eliminator, an engine and a passenger car.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

At present, with the further development of society, the requirement of people on the overall driving experience of a passenger car is further improved, so that the requirement on the NVH performance of the passenger car is higher and higher, and the noise of air inlet and exhaust of an engine becomes an object for solving the NVH concern in the passenger car industry; noise reduction is carried out on an air inlet and exhaust system of the engine by connecting a quarter-wave tube on an air inlet and exhaust pipeline; due to the problem of design space, the quarter-wave tube adopted at present mainly reduces noise of high frequency, and one quarter-wave tube only aims at noise of one frequency, so that the defects of high cost, time-consuming processing and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides an expansion type quarter-wave pipe silencing device, an engine and a passenger car.

According to some embodiments, the first aspect of the present invention provides an expanding quarter wave tube muffler device, which adopts the following technical solutions:

an expansion type quarter-wave pipe silencing device comprises an expansion type shell and a plurality of quarter-wave pipes; the expansion type shell is cylindrical, and the quarter-wave tubes are uniformly distributed on the circular section inside the expansion type shell.

Furthermore, top covers are arranged at two ends of the expansion type shell; the top cover comprises an end cover, and a connecting pipe is arranged on one side, far away from the expansion type shell, of the end cover.

Further, the diameter of the connecting pipe is smaller than that of the expandable casing.

Furthermore, a circular ring-shaped buckle is arranged on the connecting pipe.

Further, the lengths of the quarter wave tubes are different.

Furthermore, a plurality of grooves are formed in the inner wall of one end of the expansion type shell, and a plurality of convex blocks are arranged on the outer wall of one end of the quarter wave tube.

Further, a plurality of grooves are evenly distributed along the circumferential direction of the expanding type shell, and a plurality of convex blocks are evenly distributed along the circumferential direction of the quarter-wave tube.

According to some embodiments, a second aspect of the present invention provides an engine, comprising an intake pipe, an exhaust pipe, and the expanding quarter-wave tube muffler device described in the first aspect;

further, the expansion type quarter wave pipe silencing device is arranged on an air inlet pipe of the engine;

further, the exhaust pipe of the engine is provided with the expansion type quarter wave pipe silencing device;

furthermore, the air inlet pipe and the exhaust pipe of the engine are both provided with the expansion type quarter wave pipe silencing device.

According to some embodiments, a second aspect of the present invention provides a passenger vehicle that employs the engine described in the second aspect.

Compared with the prior art, the utility model has the beneficial effects that:

1. the structure of the utility model not only adopts the expansion type silencer shell, but also adds a plurality of quarter wave pipes in the shell, thereby not only weakening the noise of the specific frequency of the air inlet system, but also attenuating the whole noise level of the air inlet system through the expansion type shell.

2. The combined silencing structure can be disassembled, and is convenient to clean; the structure is simple and reliable, the manufacturing cost is low, the comfort of the whole vehicle is improved, and the popularization value is good.

3. The sound attenuation structure wave pipe is matched with the expansion type shell by adopting the convex block and the groove, so that the noise of different air inlet pipes can be changed according to different vehicle types, resources are saved, the sound attenuation structure is more standardized, and batch production and replacement are facilitated.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is a top cover structural view of embodiment 1 of the present invention;

FIG. 3 is a view showing the construction of an expandable casing according to example 1 of the present invention;

FIG. 4 is a structure view of a quarter wave tube in embodiment 1 of the present invention;

fig. 5 is a schematic view showing the assembly of the quarter wave tube inside the expandable casing according to example 1 of the present invention.

In the figure: 1. top cover, 101, connecting pipe, 102, end cover, 2, expanding shell, 201, groove, 3, quarter wave tube, 301, lug.

The specific implementation mode is as follows:

the utility model is further described with reference to the following figures and examples.

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Example 1:

as shown in fig. 1, an expanding quarter wave tube muffler device includes an expanding outer housing 2 and a plurality of quarter wave tubes 3; the expansion type shell 2 is cylindrical, and the quarter-wave tubes 3 are uniformly distributed on the circular section inside the expansion type shell 2.

Preferably, the inside of the expansion type shell 2 is provided with 5 quarter wave tubes 3 with different lengths; specifically, the 5 quarter-wave tubes 3 are designed according to the main noise frequency of the air inlet, the wavelength is one quarter of the wavelength of the main noise frequency, wherein 2 protrusions 301 arranged at 180 degrees are arranged on the peripheries of the four quarter-wave tubes 3, 4 grooves 301 arranged at 90 degrees are arranged on the periphery of one quarter-wave tube 2 to fix the other four quarter-wave tubes, and the connection positions of the protrusions 301 and the grooves 201 of the quarter-wave tubes are fixed by glue.

The five quarter-wave tubes 3 are designed according to the wavelength corresponding to the main noise frequency of the air intake system, one end of each tube is open, the other end of each tube is closed, when noise enters the structure, sound waves with the same frequency and opposite phases can be reflected, the sound waves with the frequency passing through the interior of the expansion type shell 2 are mutually offset, the noise reduction effect is achieved, specifically, when incident waves reach the structure, a part of energy is reflected back to the air intake pipeline, and therefore a part of corresponding energy is consumed.

As shown in fig. 1 and 2, the expansion type housing 2 is provided with a top cover 1 at both ends; the top cover 1 comprises an end cover 102, and a connecting pipe 1 is arranged on one side of the end cover 102 away from the expandable casing 2; the diameter of the connection pipe 101 is smaller than that of the expanding casing 2.

As shown in fig. 2, a circular buckle is arranged on the connecting pipe 101; specifically, the tail end of the expansion type shell 2 is provided with the connecting pipe 101 connected with the air inlet, and the pipeline is provided with a circular ring-shaped buckle which is convenient to be connected with the other end of the air inlet pipeline.

As shown in fig. 3 and 4, a plurality of grooves 201 are formed on the inner wall of one end of the expandable casing 2, and a plurality of protrusions 301 are formed on the outer wall of one end of the quarter wave tube 3; preferably, the inside of the expandable casing 2 has 4 grooves 201, the inside of the grooves 201 is smooth and is used for fixing the quarter-wave tubes 3, and each quarter-wave tube 3 has 2 protrusions 301 on the periphery which are matched with the grooves 201 inside the expandable casing 2.

As shown in fig. 5, a plurality of grooves 201 are uniformly distributed along the circumferential direction of the expandable shell 2, and a plurality of protrusions 301 are uniformly distributed along the circumferential direction of the quarter wave tube 3.

Example 2:

the embodiment provides an engine, which comprises an air inlet pipe, an exhaust pipe and the expanding type quarter wave pipe silencing device in the embodiment 1; specifically, the expansion type quarter wave pipe silencing device is arranged on an air inlet pipe of the engine.

Preferably, the expansion type quarter wave pipe silencing device is placed in the middle of an air inlet pipeline of the engine, normal air inlet of an air inlet system is not affected, and meanwhile noise can be eliminated to a certain extent.

Example 3:

the embodiment provides an engine, which comprises an air inlet pipe, an exhaust pipe and the expanding type quarter wave pipe silencing device in the embodiment 1; specifically, the exhaust pipe of the engine is provided with the expansion type quarter wave pipe silencing device.

Preferably, the expansion type quarter wave pipe silencing device is placed in the middle of an exhaust pipeline of the engine, normal exhaust of an air intake system is not affected, and meanwhile noise can be eliminated to a certain extent.

Example 4:

the embodiment provides an engine, which comprises an air inlet pipe, an air outlet pipe and the expansion type quarter wave pipe silencing device in the embodiment 1; specifically, the expansion type quarter wave pipe silencing devices are arranged on the air inlet pipe and the exhaust pipe of the engine.

Preferably, the expansion type quarter wave pipe silencing device is placed between an air inlet pipeline and an exhaust pipeline of the engine, normal air inlet and exhaust of an air inlet system are not affected, and noise can be eliminated to a certain extent.

Example 4:

this embodiment provides a passenger car using the engine of embodiment 2, embodiment 3, or embodiment 4.

The noise elimination structure for the air inlet pipeline of the passenger car engine is simple and reliable, the manufacturing cost is low, the NVH performance of the whole car is improved, and the noise, vibration and harshness (NVH) device has good popularization value.

The quarter wave tube is designed according to the main frequency of noise in the embodiment, and the quarter wave tube can be simply replaced by different vehicle models, so that the cost is saved.

It should be noted that the air-conditioning duct structure provided in this embodiment is not limited to the passenger car in this embodiment, but may also be an air intake system of various diesel engine models, and by such a structure, the NVH performance of the entire car can be improved, and the riding comfort can be improved.

The working principle of the silencing structure in the implementation benefit is as follows:

when sound enters the silencing structure from the air inlet pipeline, partial energy is reflected by the expansion type shell 2, the energy is consumed, in addition, a tenth wave pipe 3 can reflect sound waves with certain corresponding frequency and opposite phases, the sound waves and the corresponding sound waves in the air inlet pipeline are mutually offset, and the noise reduction effect is achieved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An expansion type quarter-wave pipe silencing device is characterized by comprising an expansion type shell and a plurality of quarter-wave pipes; the expansion type shell is cylindrical, and the quarter-wave tubes are uniformly distributed on the circular section in the expansion type shell;

the inside of the expansion type shell is provided with 5 quarter wave tubes with different lengths; specifically, 2 bumps arranged at 180 degrees are arranged on the periphery of four quarter-wave tubes, 4 grooves arranged at 90 degrees are arranged on the periphery of one quarter-wave tube to fix the rest four quarter-wave tubes, and the connection positions of the bumps and the grooves are fixed by glue;

the five quarter-wave tubes are pipelines, one end of each pipeline is an opening, and the other end of each pipeline is closed;

the two ends of the expansion type shell are provided with top covers; the top cover comprises an end cover, and a connecting pipe is arranged on one side of the end cover, which is far away from the expansion type shell; the diameter of the connecting pipe is smaller than that of the expandable casing.

2. The expanding quarter wave tube muffler assembly of claim 1, wherein said connecting tube is provided with a circular ring snap.

3. The expanding quarter wave tube muffler assembly of claim 1, wherein the plurality of quarter wave tubes are different lengths.

4. The expanding quarter wave tube muffler assembly of claim 1, wherein the inner wall of one end of the expanding housing has a plurality of grooves and the outer wall of one end of the quarter wave tube has a plurality of projections.

5. An expandable quarter wave tube muffler assembly as set forth in claim 4 wherein said plurality of grooves are evenly circumferentially distributed along said expandable outer shell and said plurality of projections are evenly circumferentially distributed along said quarter wave tube.

6. An engine comprising an intake pipe, an exhaust pipe and the expanding quarter wave tube muffler device according to any one of claims 1 to 5.

7. An engine as set forth in claim 6 wherein said diverging quarter wave tube muffler means is disposed in the intake of said engine.

8. An engine as set forth in claim 6, characterized in that the expanding quarter wave tube muffler is disposed on an exhaust pipe of the engine.

9. An engine as set forth in claim 6 wherein said diverging quarter wave tube muffler means is provided in both the intake and exhaust of said engine.

10. A passenger vehicle, characterized in that an engine according to any one of claims 6-9 is used.