CN213899143U

CN213899143U - Noise reduction device for air outlet system of turbocharger

Info

Publication number: CN213899143U
Application number: CN202022663726.7U
Authority: CN
Inventors: 蒋春雷; 安忠伟; 司丽敏
Original assignee: NINGBO FENGMAO FAR-EAST RUBBER CO LTD
Current assignee: Zhejiang Fengmao Technology Co.,Ltd.
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-08-06
Anticipated expiration: 2030-11-17

Abstract

The utility model discloses a device of making an uproar falls for turbo charger gas outlet system, including main line, resonant cavity main part and the mutually different wavelength pipe of a plurality of size, the main line includes anterior segment pipeline and back end pipeline, the resonant cavity main part setting between anterior segment pipeline and back end pipeline and both ends communicate with anterior segment pipeline and back end pipeline respectively, the wavelength pipe setting on the lateral wall of main line and with the main line intercommunication. The utility model provides a device of making an uproar falls for turbo charger gas outlet system can make and fall the device of making an uproar and eliminate the noise at a plurality of narrow frequency sections, can reduce turbo charger's the noise of giving vent to anger at the amortization frequency channel of medium-high frequency noise again simultaneously to improve the NVH level of car, provide the comfort that people took.

Description

Noise reduction device for air outlet system of turbocharger

Technical Field

The utility model belongs to the technical field of car noise control technique and specifically relates to a device of making an uproar falls for turbo charger air outlet system is related to.

Background

In addition, at the moment when an engine valve is closed, the air inlet system can be equivalent to an air column structure with one end closed and the other end open, and when the frequency of sound wave propagating in the pipe is close to the modal frequency of the air column structure, a resonance phenomenon can occur and noise is radiated. The air noise frequency after turbocharging coincides with the most sensitive sound frequency of human ears, namely 1000-3000Hz, and the sensitive people are influenced to a certain extent in the frequency sections of 800-1000Hz, 3000-4500Hz and the like, and if the frequency sections are not subjected to noise reduction and silencing treatment, the riding comfort of the automobile is greatly influenced. The existing silencing measures are as follows: helmholtz resonators, 1/4 wave tubes, and expanding resonators, but these noise reduction devices all have their own limitations; the Helmholtz resonant cavity can only eliminate low-frequency noise (f is less than or equal to 250 HZ), and is generally used in an air filter; 1/4 wavelength tube can only eliminate single frequency noise or narrow band noise (f is more than or equal to 250HZ and less than or equal to 1000 HZ); the expanding resonant cavity can eliminate noise in a single frequency band with a certain frequency as a center frequency, and can be used for reducing noise of air after a turbocharger, but the frequency band is narrow and is limited to a certain frequency band. Therefore, a noise reduction device for an air outlet system of a turbocharger needs to be designed, so that the noise reduction device can eliminate noise in a plurality of narrow frequency bands, and meanwhile, the air outlet noise of the turbocharger can be reduced in a medium-high frequency noise silencing frequency band, so that the NVH level of an automobile is improved, and the comfort of people in riding is provided.

Chinese patent application publication No. CN107725124A, published as 2018, 02, 23, entitled "turbocharger with significant noise reduction performance", discloses a turbocharger with significant noise reduction performance, which includes a turbine housing and a compressor housing, an inner wall of the turbine housing is provided with a noise reduction layer, a compressor impeller is connected with the turbine impeller through a supercharger shaft, one side of the compressor impeller is provided with a damping washer, and an inner wall of the compressor housing is provided with micropores. The noise reduction structure in the turbocharger still has the above-described problems.

Disclosure of Invention

The utility model discloses an overcome among the prior art air noise after the turbo charger and have the influence of certain degree to sensitive crowd, if do not carry out amortization noise reduction to these frequency sections and handle, will greatly influence the problem of the travelling comfort of taking of car, a device of making an uproar falls for turbo charger air outlet system is provided, can make and fall the device of making an uproar and eliminate the noise at a plurality of narrow frequency sections, simultaneously again can be at the amortization frequency channel of medium-high frequency noise, reduce turbo charger's the noise of giving vent to anger, thereby improve the NVH level of car, the comfort that people took is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a device of making an uproar falls for turbo charger gas outlet system, includes main line, resonant cavity main part and the mutually different wavelength pipe of a plurality of size, and the main line includes anterior segment pipeline and back end pipeline, and the resonant cavity main part setting is between anterior segment pipeline and back end pipeline and both ends communicate with anterior segment pipeline and back end pipeline respectively, the wavelength pipe setting on the lateral wall of main line and with the main line intercommunication.

Among the above-mentioned technical scheme, the resonant cavity main part bonds together through vibration friction welding and main pipeline, and the wave length pipe that the size is different corresponds the frequency that can the noise elimination different. A plurality of size mutually different's wavelength pipe can make the device of making an uproar of falling eliminate the noise at a plurality of narrow frequency sections, and the resonant cavity main part can reduce turbo charger's the noise of giving vent to anger at the amortization frequency channel of middle and high frequency noise to improve the NVH level of car, provide the comfort that people took.

Preferably, the resonant cavity main body comprises a resonant cavity outer shell and a resonant cavity inner core, the outer side wall of the resonant cavity inner core is provided with a plurality of partition boards which divide the inner cavity of the resonant cavity outer shell into a plurality of independent cavities, and the volumes of the independent cavities are different from each other.

Among the above-mentioned technical scheme, the resonant cavity inner core is the integrated into one piece structure, separates the resonant cavity inside with the baffle mode and has established a plurality of independent cavities of mutual independence, can be so that fall the device of making an uproar under the prerequisite of major structure compactness, can greatly increased fall the device of making an uproar at the amortization frequency channel of high-frequency noise, reduce turbo charger's the noise of giving vent to anger to improve the NVH level of car, provide the comfort that people took.

Preferably, the size and shape of the hole communicating with the center of the resonant cavity inner core are different for each independent cavity. The structure can increase the difference of the silencing structures of the independent chambers, and has better effect on eliminating noises with different frequencies.

Preferably, the resonant cavity inner core is in interference fit with the resonant cavity outer shell.

Preferably, the outer surface of one end, away from the resonant cavity main body, of the front-section pipeline is provided with a first sealing thread and a first sealing ring bulge; and a second sealing thread and a second sealing ring bulge are arranged on the outer surface of one end of the rear-section pipeline, which is far away from the resonant cavity main body. This device one end of making an uproar falls links to each other with turbo charger through a short hose, and the other end links to each other with the intercooler air inlet hose, and it is protruding that the first sealed screw thread, first sealing ring, the sealed screw thread of second and the second sealing ring at the device both ends of making an uproar fall have sealing action and anticreep effect, prevent that the hose that the high temperature and pressure too big arouse from sliding and revealing.

Preferably, the cross section of the first sealing thread is a semicircle with the radius of 1 +/-0.2 mm, and the cross section of the first sealing thread is a semicircle with the radius of 1 +/-0.2 mm; the section of the second sealing thread is a semicircle with the radius of 2 +/-0.2 mm. The structure can play a better sealing role.

Preferably, the first seal ring projection and the second seal ring projection are the same size.

Preferably, a wiring harness support is arranged on the main pipeline or the resonant cavity body or the wavelength tube. The wire harness support can restrain the wire harness and reduce vibration and noise.

Preferably, the main pipeline is provided with a fixed support, the fixed support is provided with a sleeve in threaded connection with the fixed support, and a damping pad is arranged between the sleeve and the fixed support. The fixed bolster quantity is two, and the main line links to each other with the automobile body through two fixed bolsters, prevents because of with rubber tube connection back structure overlength because of the engine shake other influences that bring in the turbo charger part.

The utility model has the advantages that: (1) the plurality of wavelength tubes with different sizes can enable the noise reduction device to eliminate noise in a plurality of narrow frequency bands; (2) the noise reduction device can greatly increase the noise reduction frequency band of the noise reduction device at medium and high frequency under the premise of compact main structure, and reduce the air outlet noise of the turbocharger.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a partial cross-sectional view of a resonator body according to the present invention;

fig. 3 is an exploded view of the present invention.

In the figure: the structure comprises a main pipeline 1, a front section pipeline 1.1, a rear section pipeline 1.2, a first sealing thread 1.3, a first sealing ring protrusion 1.4, a second sealing thread 1.5, a second sealing ring protrusion 1.6, a resonant cavity main body 2, a resonant cavity outer shell 2.1, a resonant cavity inner core 2.2, an independent cavity 2.3, a partition plate 2.4, a wavelength tube 3, a wire harness support 4, a fixing support 5 and a sleeve 6.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

Example 1:

as shown in fig. 1 and 3, a noise reduction device for an air outlet system of a turbocharger comprises a main pipeline 1, a resonant cavity main body 2 and a plurality of wavelength tubes 3 with different sizes, wherein the main pipeline 1 comprises a front section pipeline 1.1 and a rear section pipeline 1.2, and a first sealing thread 1.3 and a first sealing ring protrusion 1.4 are arranged on the outer surface of one end, away from the resonant cavity main body 2, of the front section pipeline 1.1; and a second sealing thread 1.5 and a second sealing ring bulge 1.6 are arranged on the outer surface of one end of the rear-section pipeline 1.2, which is far away from the resonant cavity main body 2. The first sealing ring bulge 1.4 and the second sealing ring bulge 1.6 are the same in size. The section of the first sealing thread 1.3 is a semicircle with the radius of 1 +/-0.2 mm, and the section of the first sealing thread 1.3 is a semicircle with the radius of 1 +/-0.2 mm; the section of the second sealing thread 1.5 is a semicircle with the radius of 2 +/-0.2 mm.

As shown in fig. 2, the resonant cavity main body 2 is cylindrical, the resonant cavity main body 2 is disposed between the front-stage pipeline 1.1 and the rear-stage pipeline 1.2, and both ends of the resonant cavity main body are respectively communicated with the front-stage pipeline 1.1 and the rear-stage pipeline 1.2, and the resonant cavity main body 2 is bonded to the main pipeline 1 by vibration friction welding. The resonant cavity main body 2 comprises a resonant cavity outer shell 2.1 and a resonant cavity inner core 2.2, and the resonant cavity inner core 2.2 is in interference fit with the resonant cavity outer shell 2.1. The resonant cavity inner core 2.2 is an integrated structure, the outer side wall of the resonant cavity inner core 2.2 is provided with 3 partition boards 2.4 which divide the inner cavity of the resonant cavity outer shell 2.1 into 4 independent cavities 2.3, and the volumes of the 4 independent cavities 2.3 are different from each other. The size and shape of the hole communicating each independent cavity 2.3 with the center of the resonant cavity inner core 2.2 are different. As shown in fig. 1 and 3, the wave tube 3 is provided on a side wall of the main pipeline 1 and communicates with the main pipeline 1. The main pipeline 1 is provided with a fixed support 5, a sleeve 6 in threaded connection with the fixed support 5 is arranged on the fixed support 5, and a damping pad is arranged between the sleeve 6 and the fixed support 5.

In the technical scheme, the resonant cavity main body 2 is bonded with the main pipeline 1 through vibration friction welding, and the wave tubes 3 with different sizes correspond to different frequencies capable of eliminating noise. A plurality of size mutually different's wavelength pipe 3 can make and fall the device of making an uproar and eliminate the noise at a plurality of narrow frequency sections, separate the resonant cavity inside with baffle 2.4 mode and set up a plurality of independent cavities 2.3, can make and fall the device of making an uproar under the prerequisite of major structure compactness, can greatly increased fall the device of making an uproar and at the amortization frequency channel of medium and high frequency noise, reduce turbo charger's the noise of giving vent to anger, thereby improve the NVH level of car, the comfort that provides people and take.

Claims

1. The utility model provides a device of making an uproar falls for turbo charger gas outlet system, characterized by includes main line, resonant cavity main part and the mutually different wavelength pipe of a plurality of size, and the main line includes anterior segment pipeline and back end pipeline, and the resonant cavity main part sets up between anterior segment pipeline and back end pipeline and both ends communicate with anterior segment pipeline and back end pipeline respectively, and the wavelength pipe sets up on the lateral wall of main line and communicates with the main line.

2. The noise reduction device for the exhaust system of the turbocharger according to claim 1, wherein the resonant cavity body comprises a resonant cavity outer shell and a resonant cavity inner core, the outer side wall of the resonant cavity inner core is provided with a plurality of partition plates for dividing the inner cavity of the resonant cavity outer shell into a plurality of independent cavities, and the volumes of the independent cavities are different from each other.

3. The noise reducer for a turbocharger air outlet system according to claim 2, wherein the size and shape of the hole communicating with the center of the resonant cavity inner core are different for each independent chamber.

4. The noise reducer for a turbocharger air outlet system according to claim 2, wherein the resonant cavity inner core is in interference fit with the resonant cavity outer shell.

5. The noise reduction device for the exhaust system of the turbocharger according to claim 1, 2, 3 or 4, wherein the outer surface of one end, away from the resonant cavity body, of the front-section pipeline is provided with a first sealing thread and a first sealing ring bulge; and a second sealing thread and a second sealing ring bulge are arranged on the outer surface of one end of the rear-section pipeline, which is far away from the resonant cavity main body.

6. The noise reduction device for the exhaust system of the turbocharger according to claim 5, wherein the cross section of the first sealing thread is a semicircle with a radius of 1 mm ± 0.2 mm; the section of the second sealing thread is a semicircle with the radius of 2 +/-0.2 mm.

7. The noise reducer for a turbocharger air outlet system according to claim 5, wherein the first sealing ring protrusion and the second sealing ring protrusion are the same size.

8. The noise reduction device for the exhaust system of the turbocharger according to claim 1, 2, 3 or 4, wherein the main pipeline is provided with a fixed support, the fixed support is provided with a sleeve in threaded connection with the fixed support, and a shock absorption pad is arranged between the sleeve and the fixed support.