KR101334311B1

KR101334311B1 - Side branch type resornator

Info

Publication number: KR101334311B1
Application number: KR1020120040219A
Authority: KR
Inventors: 황성목; 박용환; 권혁
Original assignee: 삼성중공업 주식회사
Priority date: 2012-04-18
Filing date: 2012-04-18
Publication date: 2013-11-28
Also published as: KR20130117239A

Abstract

Side branch silencers are provided. According to an aspect of the invention, the resonance cylinder having a predetermined portion of the inner space; An inlet pipe mounted on one side of the resonance tube and communicating with the space part, and having one end protruding into the space part to form a neck; And an inlet tube mounted on the other side of the resonance tube and communicating with the space portion, wherein at least one of an inner surface of one side of the resonance tube and a neck end of the inlet tube is provided with a side branch silencer formed to be inclined at a predetermined angle.

Description

Side Branch Silencer {SIDE BRANCH TYPE RESORNATOR}

The present invention relates to a side branch type silencer, and more particularly, to a side branch type silencer capable of noise reduction in a multi-band frequency range.

In general, when driving an engine or the like, an intake process of absorbing air required for combustion from the atmosphere and an exhaust process of releasing exhaust gas generated after combustion back to the outside are involved. In this case, in the intake and exhaust process as well as the noise caused by the flow of gas in the duct or the flow path, the operating noise of the engine can be transmitted along the duct or the flow path, side branch type silencer to reduce such noise Can be used.

The side branch type silencer is a device for reducing noise by resonating intake and exhaust gas by being fastened on a duct or a flow path, and can be effectively used to reduce noise at a specific frequency. For example, Korean Patent No. 10-0345155 discloses a side branch device for reducing intake noise.

However, in the case of the conventional general side branch type silencer, noise reduction is possible only at a specific frequency, and it is difficult to expect a noise reduction effect in a multi-band range, and to expand the noise reduction frequency range, a number of side branch type silencer There was a problem of complicating the structure of the device using.

Korea Patent Registration No. 10-0345155 (July 05, 2002 registration)

Embodiments of the present invention, to provide a side branch silencer that can reduce the noise in a multi-band frequency range with a simple structure.

According to an aspect of the invention, the resonance cylinder having a predetermined portion of the inner space; An inlet pipe mounted on one side of the resonance tube and communicating with the space part, and having one end protruding into the space part to form a neck; And an inlet tube mounted on the other side of the resonance tube and communicating with the space portion, wherein at least one of an inner surface of the resonance tube and a neck end of the inlet tube may be provided with a side branch silencer formed to be inclined at a predetermined angle. have.

At this time, the inlet pipe, the end of the neck is inclined at a predetermined angle is provided with an inclined end, the length of the neck is formed of a first length and a second length, the first length corresponds to the first frequency The second length may be formed to have a length corresponding to the second frequency.

In addition, the resonance cylinder, one side of the inner surface on which the inlet pipe is mounted has an inclined surface formed to be inclined at a predetermined angle, the length between the inclined surface and the end of the neck is formed of a first length and a second length, the first length is The length corresponding to the first frequency may be formed, and the second length may be formed to the length corresponding to the second frequency.

According to another aspect of the present invention, there is provided a space portion of the inside, and a resonance cylinder formed with a plurality of partitions radially; Is mounted on one side of the resonance cylinder and in communication with the space portion, one end is protruded into the space to form a neck (neck), the neck is coupled to the plurality of partition walls a plurality of outer inlet of the inlet pipe An inlet pipe partitioned into a resonance chamber and formed at multiple ends; A side branch type silencer may be provided, including; an inlet pipe mounted on the other side of the resonance cylinder and communicating with the space part.

In this case, the plurality of partitions may be formed to have different lengths, respectively.

In addition, each of the barrier ribs may be formed to have a length corresponding to each of the multiple stages of the neck formed in multiple stages.

In addition, the plurality of resonance chambers may be formed to resonate noises of different frequencies, respectively.

The side branch type silencer according to the embodiments of the present invention may include an inclined end or an inclined surface to extend the resonance frequency region, or include a plurality of resonance chambers inside the resonance cylinder, thereby extending the resonance frequency region. Therefore, the effect of the noise reduction effect can be expected in the frequency range of the multi-band, it is possible to effectively reduce the engine operating noise and the flow noise of the intake and exhaust gas with a simple structure of low cost.

1 is a perspective view of a general side branch silencer.
2 is a perspective view of a side branch silencer according to a first embodiment of the present invention.
3 is a side cross-sectional view of a side branch silencer according to a first embodiment of the present invention.
4 is a graph showing a resonant frequency range when using a side branch silencer according to a first embodiment of the present invention.
5 is a side cross-sectional view of a side branch silencer according to a second embodiment of the present invention.
6 is a perspective view of a side branch silencer according to a third embodiment of the present invention.
7 is an exploded perspective view of a side branch silencer according to a third embodiment of the present invention.
8 is a cross-sectional view taken along line AA of FIG. 6.
9 is a graph showing a resonant frequency range when using a side branch silencer according to a third embodiment of the present invention.

1 is a perspective view of a general side branch silencer.

Referring to FIG. 1, the general side branch type silencer 10 may be composed of an inlet pipe 11, a resonance cylinder 12, and an outlet pipe 13.

The inlet pipe 11 is connected to the engine and the like, and serves to guide the intake gas supplied to the engine, the exhaust gas discharged from the engine, etc. to the resonance cylinder 12, is mounted on one side of the resonance cylinder 12, the resonance cylinder ( 12) It communicates with the interior space. In addition, the outlet pipe 13 is mounted on the other side of the resonance cylinder 12, and communicates with the space inside the resonance cylinder 12, and guides the exhaust gas and the like out of the resonance cylinder 12.

The resonance cylinder 12 may be formed in a substantially hollow cylindrical shape, a predetermined amount of space is provided therein. The space portion as described above resonates the airflow flowing through the inlet pipe 11 to reduce the noise caused by the engine operating noise and the intake and exhaust gas flow to a certain degree.

In this case, the inlet pipe 11 may be mounted such that one end thereof protrudes to a predetermined degree into the resonance cylinder 12. That is, one end of the inlet pipe 11 is mounted to protrude a predetermined length into the space portion inside the resonance cylinder 12, in which case, one end of the inlet pipe 11 protrudes into the space portion is referred to as a neck (11a). The neck 11a as described above is for adjusting the frequency resonated in the resonance cylinder 12, and the resonant frequency may vary according to the length of the neck 11a.

Specifically, when the length of the neck 11a is L, the frequency resonated in the resonance cylinder 12 may be determined as in Equation 1 below.

In Equation 1, f means a frequency to be resonated, and L means the length of the neck (11a). C is a proportionality constant.

As shown in Equation 1, the general side branch silencer 10 can adjust the resonant frequency (f) through the adjustment of the length (L) of the neck (11a), the resonance frequency (f) is large in noise The length L of the neck 11a is designed to be a specific frequency that affects, thereby reducing the noise of the specific frequency band.

However, the general side branch silencer 10 as described above is effective in attenuating noise in a specific frequency band, but it is difficult to expect noise reduction effect in a plurality of frequency bands or a wide frequency range.

2 is a perspective view of a side branch silencer according to a first embodiment of the present invention. 3 is a side cross-sectional view of a side branch silencer according to a first embodiment of the present invention. For convenience of description, it is noted that in FIG.

2 and 3, the side branch silencer 100 according to the present exemplary embodiment may include an inflow pipe 110, a resonance cylinder 120, and an outflow pipe 130.

The inlet pipe 110 is connected to an engine and the like to guide the intake and exhaust gas into the resonance cylinder 120, and is mounted on one side of the resonance cylinder 120 to communicate with a space portion inside the resonance cylinder 120. In addition, one end of the inflow pipe 110 protrudes into the resonance cylinder 120 to form a neck 111. At this time, the side branch silencer 100 according to the present embodiment may be formed such that the end of the neck 111 as described above is inclined at a predetermined angle. This will be described later.

On the other hand, the resonance cylinder 120 may be formed of a hollow cylindrical member having a predetermined amount of space therein. However, the resonance cylinder 120 may have any space portion formed therein for resonance, and is not limited to the hollow cylinder as illustrated in the present embodiment.

Outflow pipe 130 is mounted on the other side of the resonance cylinder 120 is in communication with the space portion inside the resonance cylinder 120. The outlet pipe 130 guides the intake and exhaust gas introduced into the resonance tube 120 through the inlet pipe 110 to the outside of the resonance tube 120 again. At this time, the intake gas from the outlet pipe 130 may be supplied to the engine, the exhaust gas discharged through the outlet pipe 130 is discharged to the outside, or, if necessary, the economizer (economizer, the exhaust gas is reused, etc.) And the like).

On the other hand, in the case of the side branch silencer 100 according to the present embodiment, one end of the inlet pipe 110 may be formed to be inclined at a predetermined angle. Specifically, the inlet pipe 110 may be provided with an inclined end 112 by cutting the end of the neck 111 disposed at the space portion inside the resonance cylinder 120 at an inclined angle.

In this case, due to the inclined end 112, the length of the neck 111 may be formed of a first length (L1) and a second length (L2). That is, at one side of the inclined end 112, the length of the neck 111 is formed as the first length L1 having the shortest length, and at the other side of the inclined end 112, the second length having the longest length of the neck 111 is formed. It may be formed to the length (L2).

In this case, the first and second lengths L1 and L2 as described above may correspond to frequencies resonated in the resonance cylinder 120, respectively. Specifically, referring to Equation 1, in the portion where the length of the neck 111 is formed as the first length L1, the first frequency corresponding to the first length L1 is resonated, and the second length ( In the portion formed by L2), the second frequency corresponding to the second length is resonated.

In addition, since the length of the neck 111 gradually changes along the outer circumference of the inclined end 112, in the present embodiment, frequencies corresponding to the first length L1 to the second length L2 are respectively resonant. Can be resonated within 120. Therefore, as a result, a resonance phenomenon may occur in the first to second frequency domains, whereby noise in the first to second frequency domains can be reduced.

4 is a graph showing a resonant frequency range when using a side branch silencer according to a first embodiment of the present invention.

4, G1 represents a frequency range resonant in a conventional general side branch silencer 10 (see FIG. 1). As can be seen in G1 of FIG. 4, in the related art, resonance and noise reduction effects can be expected only at a specific frequency f0.

G2 of FIG. 4 shows a frequency range resonant when using the side branch silencer 100 according to the present embodiment. As can be seen in G2 of FIG. 4, in the case of the side branch silencer 100 according to the present embodiment, the resonant frequency range can be broadly extended. That is, due to the inclined end 112, since the length of the neck 111 is continuously changed from the first length L1 to the second length L2, the first frequency f1 corresponding to the first length L1. ), A resonance phenomenon may occur in a region up to the second frequency f2 corresponding to the second length L2, and thus, a noise reduction effect may be expected in a wider band than in the prior art.

In addition, intake and exhaust noise is generally generated within a certain frequency range according to engine characteristics or operating conditions. Therefore, if the first and second lengths L1 and L2 are properly adjusted through the frequency analysis of the noise, the noise is effectively within the required frequency range. Reduction effect can be expected.

Further, in the present embodiment, by cutting or shaping the end portion of the neck 111 inclined at a predetermined angle, it is possible to obtain an effect of simply widening the frequency band. Therefore, not only manufacturing is easy but also it can be applied to the side branch type silencer etc. used conventionally, and it is very excellent in technical compatibility.

5 is a side cross-sectional view of a side branch silencer according to a second embodiment of the present invention. For convenience of description, the following description will focus on the configuration that differs from the above-described first embodiment.

Referring to FIG. 5, the side branch silencer 200 according to the present exemplary embodiment may include an inlet pipe 210, a resonance tube 220, and an outlet pipe 230.

The inflow pipe 210 corresponds to the inflow pipe 110 (refer to FIG. 2 and FIG. 3) of the above-described first embodiment, and does not have an inclined end at the end of the neck 211. It can be formed similarly to the example. In addition, the outlet pipe 230 corresponds to the outlet pipe 130 (refer to FIGS. 2 and 3) of the first embodiment described above, and may be formed similarly to the first embodiment described above.

On the other hand, the resonance cylinder 220 is to reduce the noise by resonating the intake and exhaust gas, etc. through the inlet pipe 210, and corresponds to the resonance cylinder 120 (see Figs. 2 and 3) of the first embodiment described above. However, the present embodiment is different from the above-described first embodiment in that the inner surface of one side of the resonance cylinder 220 is formed to be inclined at a predetermined angle.

That is, the resonance cylinder 220 of the present embodiment may be formed to be inclined at a predetermined angle on one side of the inner surface on which the inflow pipe 210 is mounted, and may have an inclined surface 221. In addition, due to the inclined surface 221 as described above, the distance between the inner surface of the resonance tube 220 and the neck 211 may be formed to the first length (L1) and the second length (L2). Specifically, the first length L1 is the shortest distance from one side of the inclined surface 221 to the end of the neck 211, and the second length L2 is the longest distance from the other side of the inclined surface 221 to the end of the neck 211. ) May be formed. In addition, in the case described above, the distance between the inclined surface 221 and the neck 211 along the inclined surface 221 is formed to continuously change from the first length (L1) to the second length (L2).

Therefore, also in the present embodiment, similar to the first embodiment described above, resonance and noise reduction effect in the second frequency region corresponding to the first frequency to the second length (L2) corresponding to the first length (L1) In this case, it is possible to expand the noise reduction frequency range than in the prior art. Since it has been described above with reference to FIG. 4, a detailed description thereof will be omitted.

6 is a perspective view of a side branch silencer according to a third embodiment of the present invention. 7 is an exploded perspective view of a side branch silencer according to a third embodiment of the present invention. For convenience of description, it is noted that in FIG. 6, the inside is partially illustrated.

6 and 7, the side branch type silencer 300 according to the present embodiment may include an inlet tube 310, a resonance cylinder 320, and an outlet tube 330.

The outlet pipe 330 is for guiding the intake and exhaust gas in the resonance cylinder 320 to the outside again, and is the same as the outlet pipes 130, 230, FIGS. 2, 3, and 5 of the first and second embodiments described above. similar.

The inlet pipe 310 is for guiding intake and exhaust gas into the resonance cylinder 320, and corresponds to the inlet pipes 110, 210, FIGS. 2, 3, and 5 of the first and second embodiments described above. At this time, unlike the first and second embodiments described above, the inlet pipe 310 according to the present embodiment may have a multistage portion 312 formed at the end of the neck 311. Specifically, the end of the neck 311 may be formed with a multi-stage portion 312 consisting of the first to sixth stage 312a to 312f, the first to sixth stage 312a to 312f are different in length Can be formed. At this time, the length is a length from the reference line (P) shown in Figure 7 to each of the stages (312a to 312f), the length of the neck 311, the reference line (P) of Figure 7 is the inlet pipe 310 The reference position is inserted into the resonance tube 320 of the.

In this case, the length of the neck 311 may be formed as the first length L1 in the first multi-stage 312a, and the length of the neck 311 may be the second length L2 in the second multi-stage 312b. It can be formed into). In addition, the lengths of the necks 311 may be formed in third to sixth lengths (not shown) in the order of the third to sixth stages 312c to 312f. Therefore, there is an effect that the length of the neck 311 is different according to each of the multi-stages (312a to 312f) of the neck 311, due to this, it is possible to take a variety of frequency range resonant in the resonance cylinder (320). This will be described later.

Meanwhile, the resonance cylinder 320 corresponds to the resonance cylinders 120, 220, FIGS. 2, 3, and 5 of the first and second embodiments described above, and may be formed in a hollow cylinder having a space therein. In this case, the resonance cylinder 320 according to the present embodiment may have a plurality of partitions 321 formed therein. The plurality of partitions 321 may be disposed radially inside the resonance cylinder 320, and the resonance chamber 320 may include a plurality of resonance chambers S1 to S6, together with the multi-stage portion 312 formed in the inflow pipe 310. 8).

In addition, the plurality of partitions 321 may be formed to have different lengths, and each of the partitions 321a to 321f may be formed to have a length corresponding to each of the multi-stages 312a to 312f formed on the inlet pipe 310. have. Specifically, the first partition 321a may be formed to have a first length L1 corresponding to the first multi-tier 312a, and the second partition 321b may correspond to a second multi-stage 312b to have a second length. It may be formed as (L2). In addition, the third to sixth partitions 321c to 321f may correspond to the third to sixth stages 312c to 312f, respectively, and may be formed to have third to sixth lengths (not shown).

8 is a cross-sectional view taken along the line A-A shown in FIG.

Referring to FIG. 8, the plurality of partition walls 321 as described above are fastened to the corresponding multi-stages 312a to 312f to form resonance chambers S1 to S6, respectively. Specifically, the first partition 321a is in contact with one side edge of the first multi-stage 312a, and the second partition 321b is in contact with one side edge of the second multi-stage 312b. In addition, the third to sixth partitions 321c to 321f are in contact with one side edges of the third to sixth stages 312c to 312f, respectively.

Accordingly, as shown in FIG. 8, the first and second partitions 321a and 321b and the first multi-stage 312a partition the first resonance chamber S1 and the second and third partitions 321b and 321c. And the second multi-stage 312b divides the second resonance chamber S2. In the same manner as described above, the inside of the resonance cylinder 320 is partitioned into first to sixth resonance chambers S1 to S6 corresponding to the respective stages 312a to 312f.

At this time, in the present embodiment, since the length of the neck 311 in each of the multi-stages (312a to 312f) is formed different, the resonance frequency for each of the resonance chamber (S1 to S6) is different. That is, in the case of the first resonance chamber S1 corresponding to the first multi-stage 312a, since the length of the neck 311 is formed as the first length L1, at the first frequency corresponding to the first length L1, Resonance occurs, and in the case of the second resonance chamber S2 corresponding to the second multi-stage 312b, since the length of the neck 311 is formed as the second length L2, the resonance length corresponds to the second length L2. Resonance occurs at the second frequency. In this manner, resonance occurs at the first to sixth frequencies in the first to sixth resonance chambers S1 to S6, respectively.

Therefore, in the side branch type silencer 300 according to the present exemplary embodiment, resonance may occur in a plurality of frequency regions corresponding to the number of resonance chambers S1 to S6, and thus, a frequency region capable of reducing noise may be expanded. You can.

9 is a graph showing a resonant frequency range when using a side branch silencer according to a third embodiment of the present invention.

9 shows a resonance frequency region in the conventional general side branch silencer 10 (see FIG. 1), and it can be seen that resonance and noise reduction effects are shown only at a specific frequency f0.

9 shows a resonant frequency range in the use of the side branch silencer 300 according to the present embodiment. As can be seen in G3 of FIG. 9, in the case of the side branch silencer 300 according to the present embodiment, the resonance frequencies may be differently distributed for each of the resonance chambers S1 to S6, and thus the noise reduction frequency region may be expanded. have.

That is, resonance occurs at the first frequency f1 in the first resonance chambers S1 to S6 where the length of the neck 311 is formed as the first length L1, and the length of the neck 311 is equal to the second length ( Resonance occurs at the second frequency f2 in the second resonance chambers S1 to S6 formed by L2). As described above, resonance occurs at the first to sixth frequencies f1 to f6 in the first to sixth resonance chambers S1 to S6, respectively. Therefore, while resonance and noise reduction are possible only at a specific frequency f0 in the related art, resonance is possible at the first to sixth frequencies f1 to f6 in the present embodiment, whereby a frequency region in which a noise reduction effect is expected is obtained. It becomes wider. In addition, considering the characteristics of the engine, and setting a plurality of main frequency ranges for generating noise, thereby designing the length of each stage (312a to 312f), it is possible to reduce the noise even with a simple structure, compared to the conventional Do.

Meanwhile, in the present embodiment, the multi-stage portion 312 is composed of a total of six multi-stages 312a to 312f, and the inside of the resonance cylinder 320 is divided into first to sixth resonance chambers S1 to S6, but the example is illustrated. The number of resonance chambers S1 to S6 may be increased or decreased according to the number of frequency domains for which noise reduction is necessary, but is not limited thereto. That is, if necessary, the inside of the resonance cylinder 320 may be divided into first to third resonance chambers, or may be divided into first to eighth resonance chambers.

As described above, the side branch type silencers 100, 200, and 300 according to the embodiments of the present invention may include an inclined end 112 or an inclined surface 221 to extend a resonance frequency region, or may be formed inside a resonance cylinder. By providing the plurality of resonance chambers S1 to S6, the resonance frequency region can be extended. Therefore, the effect of the noise reduction effect can be expected in the frequency range of the multi-band, it is possible to effectively reduce the engine operating noise and the flow noise of the intake and exhaust gas with a simple structure of low cost.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100: side branch silencer (first embodiment)
110: inlet pipe 111: neck 112: inclined end
120: resonance tube 130: outflow pipe
200: side branch silencer (second embodiment)
210: inlet pipe 211: neck 220: resonance tube
221: slope 230: outlet pipe
300: side branch silencer (third embodiment)
310: inlet pipe 311: neck 312: multi-stage
320: resonance tube 321: bulkhead 330: outflow pipe

Claims

delete

A resonance cylinder having a predetermined space portion therein and having a plurality of partitions radially formed therein;
It is mounted on one side of the resonance cylinder and communicates with the space portion, one end protrudes into the space portion to form a neck, the neck is coupled to the plurality of partition walls partition the space portion into a plurality of resonance chambers An inlet pipe having an end portion formed in multiple stages; And
And side outlet type silencer mounted on the other side of the resonance cylinder to communicate with the space part.

The method of claim 4,
The plurality of partitions are each formed in a different length,
Each of the partition walls, side branch type silencer formed in a length corresponding to each of the multi-stage of the neck formed in multiple stages.

The method of claim 4,
And said plurality of resonance chambers respectively resonate noises of different frequencies.