DE1572485A1 - Silencer - Google Patents

Description

Ciaute, Roger PAIUiBT ₉ 5 »ru · Jean-Bdeline,! TOIlL-IIALItAMOII (France)

silencer

The invention relates to the silencer, i.e. 0erIt, di · in «inen by« in · »gas flow flowing through η channel« ing ·· β «tit w« rd «n and to constructed aind that ei · dl« transmission the sound of a sound source, especially the gas flow No sound source providing a settlement, emitted Attenuate sound energy through this gas flow. This 0erItβ, di · have · an acoustical · task · but are allowed to cause no pressure loss ^ which has a low value exceeds, as he ia general by dl · operating conditions of the plant that neighs or uses the oasis.

In order to achieve the desired damping, one is therefore dependent on having a specially designed sound absorber with very large dimensions for each individual case. These silencers are difficult to accommodate in existing systems and have a relatively high cost price, on the one hand

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because of their historical extent, on the other hand because of the need to adapt to each individual case.

The invention is based on the object of a muffler su sohaffen, which has a small footprint and can be adapted to any system at low cost can·

According to the invention, this task is provided by a silencer solved, which has a prismatic body, the cross section of which sfliehe sumlndest is bounded on part of the circumference by a curve which is essentially the shape of the L has the longitudinal half profile of a Venturi tube

Such a muffler has overtly the reduced Dimensions the advantages, only minimal pressure losses su cause and of a very limited view! starting from prefabricated element types, see each simple case let customize

In an advantageous embodiment, there is the profiled Body made of a sound-absorbing material, preferably compressed and molded glass wool or the like, which can be injected with a dumbbell, for example of a synthetic material, or by means of a fabric which is sunk against the oas flow · the surface hatch can also duroh a metal foil or other foil, such as

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i.B. tin «tthr thin« Bleohfolle, done, dl so auige « forms lit that da · prefabricated element da * above Has described profile. In that case, sunaohst da · profile old help · the full «shaped, for example« in dOnnei Bleoh around. bent around a suitable template and linga seine, dl back edge d prefabricated element forming cattle and then what is produced in this way tubular element filled with the sound-absorbing substance «Ground · So that this material fulfills its role as a §® can meet, it is sweet to wear the coat do perforate.

If the jacket consists of a metal foil, this can be done in advance of the shaping of the profile * elements sink, enamelled, laoked, etc. «ground«

Such a body can be made in great length "earth.

Sur producing a Sohalldämpfers, for example in a channel with reohteckige "or square cross section, 3 'it nfigt, the preformed body below the one sersohnelden be _a so Stfleke obtained side by side and parallel arranging each other at certain intervals from each other and thereby in the shell Kind of blinds used in the Oasstrom. In a cross-section perpendicular to the longitudinal direction of the pieces, ie a plane lying parallel to the flow direction of the square, the deformed pieces work together in such a way that they form passages,

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BATH ORIGINAL

those arranged next to one another with the passage cross-section Ventur! Pipes have a resemblance. This is how you set optimal Attenuation conditions for the Sohallenergle. A first Blinds can be followed by one or more similar blinds »whereby the various elements are interlocked can be arranged

On this catfish you get soound dampers, which with the through the filling material caused sound absorption an attenuation that is very extensive, lacking in frequency, β «one with minimal pressure losses to enable the Oasstrom.

In certain pills you may want only part affect the sound range by adding filters, for example Low pass filter. In this case it is sufficient to swel consecutive blinds in a suitable manner to arrange the prefabricated from Stttokendts according to the invention XOrpers exist, but it is not necessary to use the Provide flat holes on the outside, because the Schallsehluckelgensehaften cannot be used here.

In general, it is recommended to sloh in the profile body at the Peat making means provide that the attachment of the pieces

Enable in the coat. For example, in the

Provide pressed Schallsohluokeaterial longitudinal channels, which for the implementation of ropes or fastening rods are intended. These rods know provided with threads at the ends •• in to allow a yer screw η au »

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It is advantageous to prefabrication with swol half elements su complete, i.e. duroh body that is in cross-section • Represent in half profile, the ends of which are connected by a flat surface. These half elements serve sur Completion of the blinds / the flat canal lines Long,

After all, it can be made after dissolving the prefabricated one Body in several stacks advantageously, the cut pieces as a lightly applied mass, for example cover with tar, putty, hars, etc. *

In the following let the invention with reference to the drawing illustrated embodiments explained in one. BS seigern

Figo 1 is a perspective view of a Profile body,

Figo 2 shows a section in a sur general flow direction of a parallel plane Embodiment of the silencer according to the invention,

FIG. 3 shows a section of a similarly illustrated as Filter trained execution »form,

Io

Zn Figo 1 shows an element that sur the production of Serves silencers. This element is in the form of a longitudinal

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ORIGINAL BATHROOM

borrowed prismatic body · formed, its cross-section is a closed curve which has an axis of symmetry marked X-X, the two su this Aohse symmetrical parts of the curve essentially the font of the half-profile of the ling of a Venturi tube and thus a rounded one Front a and a practically punctiformβ rear edge f formο

In a first embodiment, such an elongated body consists of an empty jacket 1, the holes 2 has, and a core 3 * by a schallsohluokenden Fabric is formed.

This element can be made in several different ways

You can first of all shape the jacket 1, for example from a thin metal sheet, the thickness of which can be in the order of 0.1 mm, and which you bend around a template and along the rear edge f, for example by means of point welding, su8amm8Ohweissto This sheet is perforated beforehand and treated as a precaution by electroplating, enamelling, varnishing, etc. * In this way, a metal pipe is crhilted and filled with sound-absorbing material such as glass wool. In the design example, a fastening part 4 with a triangular cross-section is arranged in the vicinity of the rear edge. As a precaution, you should set before filling with the flooring material. Stioe, which are removed after filling, so that 'channels 3 are formed; will". ° ° ^{9 8 1 3 7} ° ^{6 6} ° sad -

Ntn can also be based on material that stan Pressed into a fora suitable training, so that this Material has a cross-section corresponding to the gtwüntohttn profile This core 3 is then covered with the coat 1 on his soles against the effects of the oasis, in which the cover is to be inserted · This coat can one and the core, which thus serves as a template, be bent, perforated bleoh or duroh injection of a plastic, for example a Harses. Of course, in these cases, channels in the core can also be seen

During manufacture, we can also provide half-ducks, i.e. Blenente * that end in a plane that runs through the axis of symmetry X-X ides Stttoks go hindu · You can then the coat unites; / lanen Bleohtell complete

I am a prefabricated body of great length, as shown in FIG shown, allows only this one momament on the basis the production of soy dampers, which have the most diverse characteristics, ohl looks at the dimensions of the Gas flow durohströsiten canal as auohlnsiohtlleh the characteristics of the Qasstron itself and the have locking.

Suffice it to say the Blenent depending on the dimensions si-js canal in pieces · suitable length su sersohneiden and the Sfcttske to be arranged parallel to each other so that one species in the air flow, for example an air flow Inge set the blind is formed. 009813/0 660

BAD ORi

In Pig * 2 there are 11 dl walls in the old square or rectangular cross-section of the channel. The general flow direction of the gas is denoted by P. In the example shown, the muffler consists of alternate blinds «the first ^e / of two pieces of a half-element · 6 and 6 'and of one. Stack 7 of a complete element, the profiles of these pieces together form Venturi tubes in each section lying parallel to the general direction of flow ρ , ie the width of the necks of the Venturl tubes, selects accordingly. If the effect produced by a single blind is not sufficient, you can, as PIg ₀ 2 shows, arrange a “wide blind 8, 8a behind the first and laterally offset so that the axis of the profiles of the“ wide blind ■ it coincides with the axis of the Venturi tubes of the first. Of course, all calculations of the number of blinds, the number of passages formed in each blind and the width of the duct are carried out in advance, depending on the flow characteristics, the pressure drop tolerated behind the Sohalldäapfer outlet and the desired sound shock effect «.

Die'stücke can be on the walls 11 with the help in the channels 5 introduced Oewlndestangen are attached, and the Cut fleeing can be done with a suitable protective layer, for example, tar, putty, hars, etc., are sucked over.

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Bel the vorbesehrebeneη execution shape is part of the Visual energy through the holes 2 is swallowed up by the fiber mass forming the core 3, where one enters another Form of energy is converted · However, the jacket 1 could also be made without the holes 2. The filling could then with a different material than the fibrous Sehall " Schluokmaterial take place "

In particular, in the first case, the prefabricated body can sur Production of low-pass filters according to Flg. 3 can be used « As described above, as a goose with 9 and 10 be « built-in blinds, which are arranged one behind the other at a calculated distance, so that you can swisohen according to a known Sohalldfimpferbauart a cavity remains. In this case, too, one could destroy visual energy by making the silencer out of bodies. miss Flg. 1 manufactures

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BAD ΟΠ '-?:! ΜΛ »».

Claims (1)

Pit ι nt ι ns prUe h: 1) Sohall damper ₉ identified by a semi-solid body (1.3; 6.6; 8.8 "), the cross-sectional area of which is limited on part of the circumference by a curve ₉ which essentially defines the shape of the longitudinal semi-profile of a venturi tube 2) Silencer according to claim I ₉ in that the other part of the circumference is delimited by a straight line. 3) Silencer according to claim I _9, characterized in that the curve delimiting the cross-sectional area has a Syaaetrleaehse and both curve parts essentially have the shape of the longitudinal half-profile of a Venturi tube. " *) Silencer naoh elnea of claims 1 to 3 _9, characterized in that the body has an old Durohbrflohen (2) provided outer jacket (1) and a core (3) made of sound-absorbing material _o 5) silencer according to claim 4 _9, characterized in that the jacket (1) is formed by a perforated thin · bleoh » 009813/0660 6) silencer according to claim H, characterized thereby, that the sheet sinks, "is enameled or varnished" T) SchalldüKpfer according to one of claims * to 6, characterized recognized that the sound-absorbing substance o o consists of a fibrous substance " 8) Sehalldfapfer according to claim T * daduyeh gek "nnit" pays, that the sehalleohluokend * fabric from eusauuiengepressttn the fiber is made of " 9) Sohtllümpffar according to claim ^ t ₉ gekennselehnet that the edge! made of plastic, for example an a Hsjps - », which is sprayed onto the previously profiled sohall · eohlus customer fabric. 10) Sohalldiapfer according to one of the speeches 1 to 9, thereby GeinnnHelehnet that the body of Lingskanttlen (5) durshsogen 1st 11) Beaalldtapfer according to one of claims 1 to 10, thereby it is known that several profile bodies (6,6 ', T; 8 »8a) in a channel parallel and spaced next to each other to form a blind 12) Sohalldirapfer according to claim 11, characterized in that that at least two consecutive, in the transverse direction staggered «blinds (9,10) are provided · 009813/0660 BATH ORIGINAL 13) Method for dividing a body into a one of claims 1 to 5, characterized in that first the jacket (1) by bending a foil, for example a thin sheet of metal, around a template and duroh Connect the length edges (f) of the bent film made and then the tubular body obtained in this way is filled with a sound-absorbing substance Process for the production of a body according to one of Claims 1 to 9, characterized in that the sound-absorbing Fabric is pressed together in a mold in such a way that a core (3) is created whose Qiersohnltt the desired Has shape and then the jacket (1) either by bending a perforated metal foil around the core (3), which serves as a template, and by connecting the Xanten of the film, or by spraying on a plastic, for example a resin on which the core (3) is made. 19) Process for the production of silencers for a gas flow, naoh one of claims 1 to 12, characterized gekennzelohnet, that a profile body (1,3) is cut into several pieces (8,8a), the pieces in a channel next to each other be arranged so that in the direction of flow of the Oas stream parallel planes blind-like structures arise, whose passages duroh combining the parallel Profiletüoke form Venturl tubes, with the Number of Venturl tubes and the distance between the pieces 009813/0660, ... ■ BATHROOM 1572495 Depending on the Sohallsehluok problem to be solved be ordered, and that the pieces by in the length canals (5) engaging retaining organs are attached 009 813/0660 Blank page