DE1982739U - SILENCER. - Google Patents

Description

of the company union Eisenhütte Westfalia, Wethmar Td. lünen

silencer

The invention relates to a silencer, in particular for compressed air motors, consisting of an air outlet. nozzle of the motor with a constant diameter and a pipe that surrounds part of its length, tube with a larger diameter, with the annular space formed between the tubes and closed at the end faces is connected to the inner tube through openings. ·

As is well known, extremely loud and therefore annoying exhaust noises occur with compressed air motors Sudden relaxation of the compressed air that takes place in the exhaust pipe also has a very strong cooling effect leads to the formation of ice, which often reduces the air outlet cross-section and thereby the efficiency of the Air motor reduces; A reduction in the effectiveness, degree of the air motor also takes place if a silencer that restricts the outflow of the working air is installed will. · ·. '..' ■ -.

The object of the invention is to · a silencer, in particular * -for engine t ¹ Druckluf to provide, which ensures effective damping of the exhaust noise at .geringen possible dimensions, without the efficiency of the engine is deteriorated, and that without forming ice ;. It has been found that this object "can be achieved in a surprisingly simple manner if the annular space is through"

" ² ~ Gw * 1856

The transverse walls are divided into separate chambers · ^! ; and having the wall of the inner tube in each chamber · ϊ openings. When comparing the noise, f of air motors with a silencer and those without | Silencer --SiCH shows that not only the tips of ^r at undamped motors truncated particularly prominent frequencies, but the noise level is considerably reduced as a whole. At the same time it is ascertained "that the" annoying "with undamped air outlet nozzles do not appear.

According to an advantageous further embodiment of the invention (t

it is proposed that at least the chambers be radially outward. · ■ % '_ ■

delimiting inner walls of the outer pipe with an insulating material, | f

e.g. glass wool. The buffering effect of the |

In this way, the air in the chambers is still released

improves. It is advantageous to use a |

to hold wide-meshed wire mesh. f

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The invention is explained in more detail at Han.d the figure. ·. ^

"-" '■' ■■ ■ - ■ .. 'i'

In the drawing, 1 is a pipe socket on which the from the · ■ i | '

(not shown) compressed air motor used working air '!}

.. exits .. A curved "φ

Intermediate piece 2a a straight pipe 2 connected, the con- ■ | N

centrically surrounded by a tube 3 with a larger diameter! '

is. The annular space formed between the tubes 2 and 3 is It

closed off at both ends by transverse walls 4 · and 5-] i

sen. In addition, transverse walls 6, ■;

in the illustrated embodiment, three transverse walls, i ;;

.provided, which divide the annulus into four approximately equal, large chambers ¹ i 7. . . . ·; .F ·; ■

■ '■' ■ '■' ■ ". ■ '" ■:. "■ ■■". Z :: ¹ ;; "f. · - · '

•>. · Each about halfway up one, each chamber 7 is in the · .'Ji .Inner lying pipe 2 distributed over the pipe circumference, t ^ Open- · 'I; openings 8 provided, through which the arriving from the nozzle 1 '.J

■ '' ■ · ■ ί working air can expand into the chambers 7. The walls of the outer tube 3, which border the chambers 7 radially on the outside, are covered with an insulating material 9, for example glass wool, which is held in place by a coarse-meshed wire mesh 10. - ■ '', .-. "". ·.

The compressed air, which is pre-tensioned in the engine, enters the muffler undamped through the smooth pipe sections 1 and 2a. ,. The fact that the air through the .openings 8 in the chambers, 7. can expand, you will be deprived of some of their energy. wherein the air in the chambers 7 acts as a buffer.

.'The buffer effect is here by the insulating material 9 '. reinforced. The compressed air then passes through a to the outside over the end wall 5 protruding pipe section 2b into the open.

How measurements with the frequency analyzer have shown. · Compared to undamped exhausts, not only the particularly prominent frequency peaks are suppressed, but there will be a very substantial reduction in the overall sound level

achieved. A particular advantage is that there is no formation of ice on the exhaust even in continuous operation. "· ..., despite the extraordinarily extensive damping of exhaust noises there is no noticeable drop in performance of the air motor ♦ ■

Claims (1)

1. Exhaust silencers, in particular for compressed air motors from a pipe with a constant diameter connected to the air outlet nozzle of the motor and a tube surrounding it in part of its length and having a larger diameter, the one between the tubes -. The annular space formed and closed at the end faces is connected to the inner tube through openings, . characterized by "" that the Annular space is divided into separate chambers (7) by transverse walls (6) and the wall of the interior . has lowing tube (2) in each chamber (7) openings (8). . '' -, ■. ' : 2. Silencer according to claim 1, d a d u r c h; ' marked, that at least the inner walls of the outer tube (3) delimiting the chambers (7) radially on the outside are covered with an insulating material (9), e.g. glass wool. ■ '.. 3. Silencer according to claims 1 and 2, d ad u r c h g e k en η ζ eic h η et that the insulating material (9) of, / p a coarse-meshed wire mesh, (10) is held. · [[ t-silencer according to claims 1 - 3, d a du r c h Ir gek en η I show η et that the openings · (8) in the ~ \\> Inner tube (2) in μ extending in the Urafang direction Rows are arranged. ~, '' Ii 5. Silencer according to claims 1 - 4, d a d ύ r c h! {■ g e k e η η ζ e i c h η e t that the openings (8) in the] Inner tube (2) in each case approximately in the ι perpendicular to the tube axis. Arranged in the middle plane of the chambers (7). ■. ii