CN218467704U - Noise reduction device for air outlet system of turbocharger - Google Patents

Abstract

The utility model discloses a noise reduction device of a turbocharger air outlet system, which belongs to the field of noise reduction devices and comprises a resonant cavity shell, wherein a resonant cavity inner core is arranged in the resonant cavity shell, a plurality of partition plates which are in interference fit with the resonant cavity shell are arranged on the resonant cavity inner core, a plurality of cavities which are formed by separating the partition plates are arranged between the resonant cavity inner core and the resonant cavity shell, and a plurality of noise reduction holes are arranged on the resonant cavity inner core; through designing into not equidimension with the cavity, the hole of making an uproar of falling in the different cavities designs into different apertures, can be so that there are a plurality of cavities of making an uproar to fall to different frequency channels in the resonant cavity to improved the width of the frequency channel of making an uproar of falling, and can fall the noise of high-frequency channel and low frequency channel simultaneously, solved prior art, the frequency channel of making an uproar of falling of device of making an uproar is single or narrower, is not suitable for the problem that uses in the automobile engine air intake system.

Description

Noise reduction device for air outlet system of turbocharger

Technical Field

The utility model relates to a device of making an uproar falls especially relates to a device of making an uproar falls in turbo charger air outlet system.

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 noise frequency of the air after turbocharging is coincident with the most sensitive sound frequency of the human ear by 1000-3000Hz, the sensitive people can be influenced to a certain extent in the frequency ranges of 800-1000Hz, 3000-4500Hz and the like, and if the noise reduction treatment is not carried out on the frequency ranges, the riding comfort of the automobile is greatly influenced.

The existing silencing measures are as follows: helmholtz resonators, 1/4 wavelength tubes, and expanding resonators, but these noise reduction devices 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; the 1/4 wavelength tube can only eliminate single-frequency noise or noise of narrow frequency band (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.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome prior art, the device of making an uproar falls the frequency channel of making an uproar single or narrower, is not suitable for the problem that uses in the automobile engine air intake system, provides a device of making an uproar falls in turbo charger air outlet system, can fall the noise at high frequency channel and low frequency channel simultaneously, has the wideer frequency channel of making an uproar that falls to can avoid the air noise that produces behind the turbo charger to the influence of people's ear.

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

the utility model discloses device of making an uproar falls in turbo charger air outlet system, including the resonant cavity shell, install the resonant cavity inner core in the resonant cavity shell, be equipped with a plurality of and resonant cavity shell interference fit's baffle on the resonant cavity inner core, divide into the cavity that a plurality of formed through the baffle partition between resonant cavity inner core and the resonant cavity shell, it falls the hole of making an uproar to be equipped with a plurality of on the resonant cavity inner core.

In this scheme, because be equipped with a plurality of cavity outside the resonant cavity inner core, through designing into not equidimension with the cavity, the hole of making an uproar that falls in the different cavities designs into different apertures, can be so that there are a plurality of cavities of making an uproar to different frequency channels in the resonant cavity to improved the width of the frequency channel of making an uproar of falling, and can fall the noise of high-frequency channel and low-frequency channel simultaneously and make an uproar.

Preferably, the chamber includes a high-frequency chamber and a low-frequency chamber, the noise reduction holes include a high-frequency noise reduction hole and a low-frequency noise reduction hole, the high-frequency chamber and the high-frequency noise reduction hole reduce noise for a high-frequency portion of noise, and the low-frequency chamber and the low-frequency noise reduction hole reduce noise for a low-frequency portion of noise.

Preferably, two ends of the resonant cavity shell are respectively connected with a front pipeline and a rear pipeline, and the front pipeline and the rear pipeline can be respectively connected with an air inlet hose of a turbocharger and an intercooler.

Preferably, the caliber of the resonant cavity shell is gradually increased from one end close to the front pipeline to one end close to the rear pipeline; by the structure, interference fit can be realized only by pressing a small opening from a large opening in the process of installing the resonant cavity inner core into the resonant cavity shell.

Preferably, the resonant cavity shell is connected with the front pipeline and the rear pipeline through vibration friction welding.

Preferably, the resonant cavity outer shell comprises a fixed outer shell and an adjusting outer shell, the resonant cavity inner core comprises an adjusting part, the adjusting outer shell is mounted on the adjusting part, a first auxiliary cavity and a second auxiliary cavity are arranged in the adjusting outer shell, a first auxiliary hole is arranged on the inner side of the first auxiliary cavity, a second auxiliary hole is arranged on the inner side of the second auxiliary cavity, the aperture of the first auxiliary hole is smaller than that of the noise reduction hole in the adjusting part, and the aperture of the second auxiliary hole is larger than or equal to that of the noise reduction hole in the adjusting part; through the structure, the adjusting part can enable the first auxiliary hole to be aligned with the noise reduction hole or the second auxiliary hole to be aligned with the noise reduction hole through adjustment, so that the auxiliary cavity can be switched between the two functions of noise reduction at the auxiliary high frequency and noise reduction at the auxiliary low frequency, the auxiliary cavity can be adaptively adjusted according to the test result of the noise frequency band deviated to the high frequency or the low frequency, and the pertinence of noise reduction is improved.

Preferably, the fixed shell is provided with a locking fixture block, and the adjusting shell is provided with a locking clamping groove matched with the locking fixture block; the locking fixture block can lock and fix the adjusting shell after the adjusting shell rotates.

Therefore, the utility model discloses following beneficial effect has: (1) Noise reduction can be simultaneously carried out in a high frequency band and a low frequency band, and the noise reduction frequency band is wider, so that the influence of air noise generated after turbocharging on human ears can be avoided; (2) The adaptability of the device to noise of different frequency bands can be improved by adjusting the shell.

Drawings

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

Fig. 2 is an exploded view of a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of an adjusting cavity according to a second embodiment of the present invention.

In the figure: 1. resonant cavity shell 2, resonant cavity inner core 3, baffle 4, fall the hole of making an uproar 5, preceding pipeline 6, back pipeline 7, mouth of pipe boss 8, spacing boss 9, HENN insert-buckle soon and press interface 10, fixed bolster 11, pencil fixed bolster 12, fixed shell 13, adjust shell 14, regulating part 15, first supplementary chamber 16, the supplementary chamber 17 of second, first supplementary hole 18, the supplementary hole 19 of second, locking fixture block 20, locking draw-in groove.

Detailed Description

To make the objects, technical solutions and advantages of embodiments of the present invention clearer, the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

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 solution, and are not construed as limiting the present solution.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the first embodiment, as shown in fig. 1-2, a noise reduction device for an air outlet system of a turbocharger includes a resonant cavity housing 1, a resonant cavity inner core 2 is installed in the resonant cavity housing, a plurality of partition plates 3 in interference fit with the resonant cavity housing are arranged on the resonant cavity inner core, five chambers partitioned by the partition plates are divided between the resonant cavity inner core and the resonant cavity housing, a plurality of noise reduction holes 4 are arranged on the resonant cavity inner core, each chamber includes a high-frequency chamber and a low-frequency chamber, the volume of each chamber is different, the aperture of the noise reduction hole located in each chamber is different, and the noise reduction hole includes a high-frequency noise reduction hole and a low-frequency noise reduction hole; the two ends of the resonant cavity shell are respectively connected with a front pipeline 5 and a rear pipeline 6, the front pipeline is provided with an assembly boss and is connected with an intercooler air inlet end through a rubber hose, the boss anti-falling distance of a pipe orifice boss 7 is 7 +/-0.3 mm, the axial distance from the pipe orifice boss to a limiting boss 8 is not less than 30mm, the diameter of the pipe orifice boss is not less than 58mm, the rear pipeline is provided with an HENN fast inserting and buckling pressing interface 9, the concentricity of the HENN fast inserting and buckling pressing interface is not more than 0.2mm, and the wall thickness tolerance is +/-0.1 mm; the aperture of the resonant cavity shell is gradually increased from one end close to the front pipeline to one end close to the rear pipeline, and the resonant cavity inner core is integrally formed and is plugged into the resonant cavity shell through interference fit; the sealing thread on the outer surface of the thread at the assembling end of the front pipeline is designed according to German standard DIN3021-3, and the distance from the thread closest to the boss of the pipe orifice is 2.5 +/-0.2 mm; the front pipeline is also provided with a fixing bracket 10 and a wiring harness fixing bracket 11.

The utility model discloses it connects between turbo charger and intercooler to fall the device of making an uproar, and one end is passed through HENN and is inserted soon and be connected with turbo charger, and one end is provided with seal structure's screw thread and the boss of anticreep to better and flexible rubber hose link to each other. Meanwhile, a plurality of mutually independent auxiliary resonant cavities are arranged in the resonant cavities in a partition mode, so that the transmission loss of the noise reduction device can be reduced on the premise of compact main structure, the noise reduction frequency band of the noise reduction device at medium and high frequency noise can be greatly increased, the air outlet noise of the turbocharger is reduced, the NVH level of an automobile is improved, and the comfort of people taking is provided.

Embodiment two, as shown in fig. 3-4, a turbocharger air outlet system noise reduction device is different from embodiment one in that a structure for improving noise reduction adaptability to high frequency or low frequency bands is added: the resonant cavity shell comprises a fixed shell 12 and an adjusting shell 13, the resonant cavity inner core comprises an adjusting part 14, the adjusting shell is mounted on the adjusting part, a first auxiliary cavity 15 and a second auxiliary cavity 16 are arranged in the adjusting shell, a first auxiliary hole 17 is arranged on the inner side of the first auxiliary cavity, a second auxiliary hole 18 is arranged on the inner side of the second auxiliary cavity, the aperture of the first auxiliary hole is smaller than that of the noise reduction hole 4 on the adjusting part, and the aperture of the second auxiliary hole is larger than or equal to that of the noise reduction hole on the adjusting part; the fixed shell is provided with a locking clamping block 19, the adjusting shell is provided with a locking clamping groove 20 matched with the locking clamping block, and the locking clamping block is rotatably connected with the fixed shell.

Through turning over the locking fixture block from the locking draw-in groove, can rotate and adjust the shell to make first auxiliary hole or second auxiliary hole align to fall the hole of making an uproar, thereby change the effective aperture of falling the hole of making an uproar, and then change the frequency channel of making an uproar that falls in auxiliary chamber, when auxiliary chamber is used for the high frequency to fall the noise, the device is whole more to be applicable to the noise of partial to the high frequency, when auxiliary chamber is used for the low frequency to fall the noise, the device is whole more to be applicable to the noise of partial to the low frequency.

Claims (5)

1. A noise reduction device for an air outlet system of a turbocharger is characterized by comprising a resonant cavity shell, wherein a resonant cavity inner core is installed in the resonant cavity shell, a plurality of partition plates in interference fit with the resonant cavity shell are arranged on the resonant cavity inner core, a plurality of cavities formed by partition plates are divided between the resonant cavity inner core and the resonant cavity shell, and a plurality of noise reduction holes are formed in the resonant cavity inner core; the chambers comprise a high-frequency chamber and a low-frequency chamber, and the noise reduction holes comprise high-frequency noise reduction holes and low-frequency noise reduction holes; the resonant cavity shell includes fixed shell and regulation shell, the resonant cavity inner core includes the regulating part, it installs on the regulating part to adjust the shell, be equipped with first supplementary chamber and the supplementary chamber of second in the regulation shell, the inboard in first supplementary chamber is equipped with first auxiliary hole, the supplementary intracavity side of second is equipped with the supplementary hole of second, the aperture in first auxiliary hole is less than the aperture in the hole of making an uproar on the regulating part, the aperture in the supplementary hole of second is greater than or equal to the aperture in the hole of making an uproar on the regulating part.

2. The noise reduction device for the exhaust system of the turbocharger according to claim 1, wherein a front pipeline and a rear pipeline are respectively connected to two ends of the resonant cavity shell.

3. The turbocharger air outlet system noise reduction device according to claim 1, wherein the resonant cavity housing has a gradually increasing caliber from an end near the front pipeline to an end near the rear pipeline.

4. The turbocharger air outlet system noise reduction device according to claim 1, wherein the resonant cavity housing is connected with the front pipeline and the rear pipeline through vibration friction welding.

5. The noise reduction device for the exhaust system of the turbocharger as claimed in claim 1, wherein a locking clamping block is mounted on the fixed housing, and a locking clamping groove matched with the locking clamping block is formed in the adjusting housing.

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