EP0740080B1 - Filter-silencer - Google Patents

Filter-silencer Download PDF

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Publication number
EP0740080B1
EP0740080B1 EP96810228A EP96810228A EP0740080B1 EP 0740080 B1 EP0740080 B1 EP 0740080B1 EP 96810228 A EP96810228 A EP 96810228A EP 96810228 A EP96810228 A EP 96810228A EP 0740080 B1 EP0740080 B1 EP 0740080B1
Authority
EP
European Patent Office
Prior art keywords
filter
muffling
muffler
casing
elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96810228A
Other languages
German (de)
French (fr)
Other versions
EP0740080A3 (en
EP0740080A2 (en
Inventor
Josef Bättig
Reto Meier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Accelleron Industries AG
Original Assignee
ABB Turbo Systems AG
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Filing date
Publication date
Application filed by ABB Turbo Systems AG filed Critical ABB Turbo Systems AG
Publication of EP0740080A2 publication Critical patent/EP0740080A2/en
Publication of EP0740080A3 publication Critical patent/EP0740080A3/en
Application granted granted Critical
Publication of EP0740080B1 publication Critical patent/EP0740080B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663Sound attenuation
    • F04D29/664Sound attenuation by means of sound absorbing material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02Air cleaners
    • F02M35/024Air cleaners using filters, e.g. moistened
    • F02M35/02475Air cleaners using filters, e.g. moistened characterised by the shape of the filter element
    • F02M35/02483Cylindrical, conical, oval, spherical or the like filter elements; wounded filter elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205Flow throttling or guiding
    • F02M35/1211Flow throttling or guiding by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205Flow throttling or guiding
    • F02M35/1227Flow throttling or guiding by using multiple air intake flow paths, e.g. bypass, honeycomb or pipes opening into an expansion chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/14Combined air cleaners and silencers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps

Definitions

  • the invention relates to a filter silencer, as in The preamble of the first claim is described.
  • Such a filter silencer is known, for example from EP 0574605 A1.
  • Filter silencers of this type are used, for example, on the intake side of a compressor which compresses combustion air and supplies it to an internal combustion engine.
  • a compressor is driven by the exhaust gas turbine of an exhaust gas turbocharger.
  • Mainly in the compressor wheel there are sound waves of undesirable high amplitude, which are released to the environment through the air intake duct. These sound waves are therefore usually attenuated by means of a silencer.
  • ambient air flows through a filter arranged on the circumference of a muffler into the interior of the muffler equipped with damping elements, then flows past the damping elements, and is deflected by guide elements to the compressor wheel, from which sound waves emanate against the air flow.
  • the sound damping takes place dissipatively on the damping elements, in that the sound energy is converted into heat directly by porous or fibrous absorption materials, from which the damping elements are essentially constructed.
  • the above-mentioned EP 0574605 A1 describes a filter silencer which consists of a cast monoblock and in whose radial ribs the grooves are arranged with grooves.
  • a filter frame consisting of a removable perforated sheet metal part, surrounds the silencer in such a way that the damping elements are secured against radial falling out.
  • the perforated sheet metal part is arranged in a ring around the silencer by means of connecting elements.
  • a disc-shaped damping element consists of four damping segments, which together form an annular surface.
  • An absorption element is held by two punched perforated sheets, and thus forms a damping segment which is radially inserted into the grooves of the above-mentioned ribs of the cast monoblock.
  • edges of the damping segments punched out of perforated sheet have a disadvantage in the construction of this filter silencer.
  • These edges of the damping segments in the form of ring segments are not treated further after punching out, and thus have free-standing sheet metal webs due to the sheet metal perforation.
  • These sheet metal webs can break off due to mechanical vibrations to which the entire filter silencer is exposed, and then the broken off pieces with sucked-in air can get into the compressor and into the combustion chamber of an internal combustion engine and damage them.
  • the damping material then swells and thus impairs the air inlet channels with regard to the flow properties.
  • the deflection by guide elements on the damping elements also has an unfavorable effect on the flow properties of the air, since it causes compression losses of undesirable height.
  • the invention has for its object a filter silencer to further develop the type mentioned at the beginning, that the disadvantages mentioned above are reduced or be avoided. At the same time, the damping properties the silencer can be improved, and the Manufacturing and assembly costs can be reduced.
  • the closed edges of the are also advantageous Damping plates that run along the perforated plate webs, and therefore have no free-standing metal webs.
  • the coarse filter that surrounds the sports silencer is segment by segment divided, and the segments are on the damping plates arranged so that the coarse filter is not required as a single component.
  • the arrangement of a cast-in is also advantageous Rohres as a washing device for the compressor wheel in the Housing wall of the connection side of the filter silencer.
  • This pipe is connected to a supply line that does not like with conventional silencers, guided around them must be because their connection to the washing device on the end of the filter silencer is arranged.
  • Fig. 1 shows a cylindrical filter silencer, which is essentially composed of a housing 2, a number, here thirty-three, damping elements 3 and a filter 4.
  • 2 shows the housing 2 cast as a monoblock made of aluminum, the housing wall 5 of which is connected on the connection side 20 of the filter muffler by means of connecting webs 7 to the housing wall 6 on the end side 21.
  • Circular arc-shaped grooves 8 are cast in on the inner sides of the housing walls 5, 6 and run narrower towards the inner radius of the filter muffler.
  • the cross-sectional area of a connecting web 7 is the same in shape and curvature of a groove 8, and the distribution of the thirty-three grooves 8 and the three connecting webs 7 has been made uniformly over the circumference of the housing in a 10 ° division.
  • webs 14 are arranged which have a constant width from the outer circumference of the housing 2 to the inner radius in FIG.
  • a connection flange 22 is arranged on the connection side 20, with which the filter silencer is mounted on the compressor side of an exhaust gas turbocharger, not shown here. As shown in FIG.
  • a tube 18 with a thread 19 is cast into the housing wall 5 on the connection side 20 in the radial direction, which is angled toward the connection side 20 at the end pointing to the central axis 13 of the housing 2.
  • This tube serves as a washing device for the compressor wheel, not shown here, and is connected directly to the thread 19 with a line, also not shown, on the connection side 20 of the filter silencer.
  • the damping elements 3 are secured with straps 16, which are closed on the circumference of the housing 2 by means of quick-release fasteners 17, against falling out.
  • the filter muffler is surrounded on its circumference by an annular filter 4 made of polyurethane foam (PU foam), which filters out particles in the ambient air drawn in.
  • the circumference of the annular filter 4 is smaller than the outer circumference of the filter muffler in the unassembled state, so that the filter 4, which is made of PU-elastic rubber, is fixed to the circumference of the muffler by spring force.
  • PU foam polyurethan
  • damping plate 9 is punched during manufacture in the form of a rectangle from perforated plate with square holes along the perforated webs, and thus has no free-standing webs.
  • the rectangular perforated plate is then bent in such a way that a concave surface 12 is formed, to which a convex surface 11 adjoins.
  • a flat surface 15 adjoins the convex surface 11 and is bent as a coarse filter segment 15.
  • the concave surface 12 and the convex surface 11 run approximately parallel and form an intermediate space 23 into which the absorption element 10, FIG. 5, is inserted.
  • An absorption element 10 is thicker than the intermediate space 23, so that when an absorption element 10 is inserted into the intermediate space 23, the surfaces 11, 12 are to be elastically bent apart. After the absorption elements 10 have been inserted into the intermediate space 23, they are clamped between the surfaces 11, 12 on account of their thickness.
  • the material used for an absorption element 10 is an open-cell foam which, with the same damping properties, has only about 6% of the specific weight of conventional absorption materials such as wool felt.
  • the absorption elements 10 shown in FIG. 5 are cut out rectangularly from foam sheets and are shown here only as bent in their installed state.
  • FIG. 6 shows the arrangement of the damping elements 3, consisting of the damping plate 9 and the absorption element 10, in the circular cylindrical housing 2 with the central axis 13 on the basis of a cross-sectional segment of a filter muffler.
  • the damping elements 3 are radially inserted into the grooves 8 and are of the type arranged that their damping surfaces 11, 12 run parallel to the central axis 13 of the housing 2.
  • the width of the webs 14, and thus also the cross-sectional area of the air inlet ducts 24 between adjacent damping elements 3, is constant from the outer circumference of the filter muffler to the central axis 13, which ensures a constant speed of the ambient air drawn in. This arrangement reduces compression losses that occur in conventional silencer systems.
  • the coarse filter segments 15 of the built-in damping plates 9 are combined to form a coarse filter ring, so that a coarse filter as an individual component is not required.
  • An arc-shaped arrangement of the damping elements 3 in the housing 2 extends the air inlet ducts 24, and thus the path of the sound waves, in comparison to purely radial air inlet ducts, as occur in conventional filter silencers with the same outer circumference. This extension of the damping path alone, with the same dimensions as conventional filter silencers, improves sound absorption.

Abstract

The damping components are accommodated in a monobloc housing (2) with a central axis (13). Each component (3) consists of a single metal damping sheet (9) enclosing an absorbent insert (10). They are accommodated in radial grooves (8) in the housing walls, their damping faces (11,12) being parallel to the central axis. Both the components and the grooves can be curved, while air inlet passages (24) of constant cross-section are formed between the components. The cores can be of foam material. Segments (15) on the damping sheets can form an annular coarse filter when the components are installed.

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung betrifft einen Filterschalldämpfer, wie er im Oberbegriff des ersten Anspruchs beschrieben ist.The invention relates to a filter silencer, as in The preamble of the first claim is described.

Ein derartiger Filterschalldämpfer ist beispielsweise bekannt aus der EP 0574605 A1.Such a filter silencer is known, for example from EP 0574605 A1.

STAND DER TECHNIKSTATE OF THE ART

Filterschalldämpfer dieser Art werden beispielsweise eingesetzt auf der Ansaugseite eines Verdichters, der Verbrennungsluft komprimiert und einem Verbrennungsmotor zuführt. Angetrieben wird ein derartiger Verdichter von der Abgasturbine eines Abgasturboladers.
Vorwiegend im Verdichterrad entstehen dabei Schallwellen unerwünscht hoher Amplitude, die durch den Luftansaugkanal an die Umgebung freigesetzt werden. Diese Schallwellen werden daher üblicherweise mittels eines Schalldämpfers gedämpft. Hierfür strömt Umgebungsluft durch ein am Umfang eines Schalldämpfers angeordnetes Filter in den mit Dämpfungselementen ausgestatteten Innenraum des Schalldämpfers, strömt anschliessend an den Dämpfungselementen vorbei, und wird zum Verdichterrad, von dem entgegen der Luftströmung Schallwellen ausgehen, durch Leitelemente umgelenkt. Die Schalldämpfung erfolgt an den Dämpfungselementen dissipativ, indem die Schallenergie unmittelbar durch poröse oder faserige Absorptionsmaterialien, aus denen die Dämpfungselemente im wesentlichen aufgebaut sind, in Wärme umgesetzt wird.
Die oben erwähnte EP 0574605 Al beschreibt einen Filterschalldämpfer, der aus einem gegossenen Monoblock besteht, und in dessen strahlenförmigen Rippen mit Nuten die Dämpfungselemente angeordnet sind. Ein Filterrahmen, bestehend aus einem abnehmbaren Lochblechteil, umgibt den Schalldämpfer in der Art, dass die Dämpfungselemente gegen radiales Herausfallen gesichert werden. Das Lochblechteil ist mittels Verbindungselementen ringförmig um den Schalldämpfer angeordnet.
Ein scheibenförmiges Dämpfungselement besteht aus vier Dämpfungssegmenten, die zusammengesetzt eine Ringfläche darstellen. Ein Absorptionselement wird von zwei gestanzten Lochblechen gehalten, und bildet so ein Dämpfungssegment, das in die Nuten der oben erwähnten Rippen des gegossenen Monoblocks radial eingeführt wird.
Filter silencers of this type are used, for example, on the intake side of a compressor which compresses combustion air and supplies it to an internal combustion engine. Such a compressor is driven by the exhaust gas turbine of an exhaust gas turbocharger.
Mainly in the compressor wheel, there are sound waves of undesirable high amplitude, which are released to the environment through the air intake duct. These sound waves are therefore usually attenuated by means of a silencer. For this purpose, ambient air flows through a filter arranged on the circumference of a muffler into the interior of the muffler equipped with damping elements, then flows past the damping elements, and is deflected by guide elements to the compressor wheel, from which sound waves emanate against the air flow. The sound damping takes place dissipatively on the damping elements, in that the sound energy is converted into heat directly by porous or fibrous absorption materials, from which the damping elements are essentially constructed.
The above-mentioned EP 0574605 A1 describes a filter silencer which consists of a cast monoblock and in whose radial ribs the grooves are arranged with grooves. A filter frame, consisting of a removable perforated sheet metal part, surrounds the silencer in such a way that the damping elements are secured against radial falling out. The perforated sheet metal part is arranged in a ring around the silencer by means of connecting elements.
A disc-shaped damping element consists of four damping segments, which together form an annular surface. An absorption element is held by two punched perforated sheets, and thus forms a damping segment which is radially inserted into the grooves of the above-mentioned ribs of the cast monoblock.

Nachteilig an dem Aufbau dieses Filterschalldämpfers wirken sich die Ränder der aus Lochblech gestanzten Dämpfungssegmente aus. Diese Ränder der Dämpfungssegmente mit der Form von Ringsegmenten werden nach dem Ausstanzen nicht weiterbehandelt, und weisen somit aufgrund der Blechlochung freistehende Blechstege auf. Diese Blechstege können durch mechanische Schwingungen, denen der gesamte Filterschalldämpfer ausgesetzt ist, abbrechen und anschliessend können die abgebrochenen Stücke mit angesaugter Luft in den Verdichter und in den Brennraum einer Verbrennungsmaschine gelangen und diese beschädigt. An den Stellen, wo Blechstege ausgebrochen sind, quellt dann das Dämpfungsmaterial auf und beeinträchtigt damit die Lufteinlasskanäle hinsichtlich der Strömungseigenschaften.
Weiterhin ungünstig für die Strömungseigenschaften der Luft wirkt sich die Umlenkung durch Leitelemente an den Dämpfungselemente aus, da durch sie Kompressionsverluste unerwünschter Höhe auftreten.
The edges of the damping segments punched out of perforated sheet have a disadvantage in the construction of this filter silencer. These edges of the damping segments in the form of ring segments are not treated further after punching out, and thus have free-standing sheet metal webs due to the sheet metal perforation. These sheet metal webs can break off due to mechanical vibrations to which the entire filter silencer is exposed, and then the broken off pieces with sucked-in air can get into the compressor and into the combustion chamber of an internal combustion engine and damage them. At the points where sheet metal webs have broken out, the damping material then swells and thus impairs the air inlet channels with regard to the flow properties.
The deflection by guide elements on the damping elements also has an unfavorable effect on the flow properties of the air, since it causes compression losses of undesirable height.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Der Erfindung liegt die Aufgabe zugrunde, einen Filterschalldämpfer der eingangs genannten Art dahingehend weiterzuentwickeln, dass die oben erwähnten Nachteile verringert oder vermieden werden. Dabei sollen gleichzeitig die Dämpfungseigenschaften des Schalldämpfers verbessert werden, und der Herstellungs- und Montageaufwand reduziert werden.The invention has for its object a filter silencer to further develop the type mentioned at the beginning, that the disadvantages mentioned above are reduced or be avoided. At the same time, the damping properties the silencer can be improved, and the Manufacturing and assembly costs can be reduced.

Erfindungsgemäss wird diese Aufgabe durch die Merkmale des ersten Anspruchs gelöst.According to the invention, this object is achieved through the features of first claim solved.

Die Vorteile der Erfindung sind unter anderem darin zu sehen, dass nur noch Dämpfungselemente eingesetzt werden, die gleichen Typs sind, und dabei nur noch aus zwei Teilen bestehen, nämlich einem Dämpfungsblech und einem Absorptionselement.
Das Herabsetzen der Anzahl unterschiedlicher Bauteile ist besonders hinsichtlich des logistischen Aufwandes von Vorteil.
The advantages of the invention can be seen, inter alia, in the fact that only damping elements are used which are of the same type and only consist of two parts, namely a damping plate and an absorption element.
Reducing the number of different components is particularly advantageous in terms of logistical effort.

Ebenfalls vorteilhaft sind die geschlossenen Kanten der Dämpfungsbleche, die entlang der Lochblechstege verlaufen, und somit keine freistehenden Blechstege aufweisen.The closed edges of the are also advantageous Damping plates that run along the perforated plate webs, and therefore have no free-standing metal webs.

Das Grobfilter, das den Fiterschalldämpfer umgibt, ist segmentweise geteilt, und die Segmente sind an den Dämpfungsblechen angeordnet, sodass das Grobfilter als Einzelbauteil entfällt.The coarse filter that surrounds the sports silencer is segment by segment divided, and the segments are on the damping plates arranged so that the coarse filter is not required as a single component.

Vorteilhaft ist weiterhin die Anordnung eines eingegossenen Rohres als Waschvorrichtung für das Verdichterrad in der Gehäusewand der Anschlussseite des Filterschalldämpfers. The arrangement of a cast-in is also advantageous Rohres as a washing device for the compressor wheel in the Housing wall of the connection side of the filter silencer.

Dieses Rohr ist mit einer Zuleitung verbunden, die nicht, wie bei herkömmlichen Schalldämpfern, um diesen herumgeführt werden muss, weil deren Anschluss zur Waschvorrichtung auf der Abschlussseite des Filterschalldämpfers angeordnet ist.This pipe is connected to a supply line that does not like with conventional silencers, guided around them must be because their connection to the washing device on the end of the filter silencer is arranged.

Weiterhin ist es von Vorteil, dass die Luft zwischen benachbarten Dämpfungsblechen in Schalldämpferkanälen mit konstantem Querschnitt geführt wird, und somit die Luft beim Ansaugen einer konstanten Geschwindigkeit unterliegt, wodurch nur geringe Kompressionsverluste auftreten.It is also advantageous that the air between neighboring Damping plates in muffler ducts with constant Cross-section is guided, and thus the air when sucking is subject to a constant speed, whereby only low compression losses occur.

Es ist besonders zweckmässig, wenn wegen der guten Dämpfungseigenschaften als Absorptionsmaterial in den Dämpfungselementen ein offenzelliger Schaumstoff mit hoher Elastizität verwendet wird. Im Vergleich zu Wollfilz als Absorptionsmaterial wird mit dieser Art Schaumstoff gleichzeitig eine beachtliche Gewichtsreduktion des gesamten Filterschalldämpfers erzielt.It is particularly useful if because of the good damping properties as an absorption material in the damping elements an open-cell foam with high elasticity is used. Compared to wool felt as an absorption material with this type of foam it becomes a considerable weight reduction of the entire filter silencer achieved.

KURZE BESCHREIBUNG DER ZEICHNUNGBRIEF DESCRIPTION OF THE DRAWING

Die Erfindung wird nachfolgend anhand schematischer Darstellungen eines Ausführungsbeispiels in der Zeichnung erläutert.
Es zeigen:

Fig. 1
einen Teilsegmentschnitt eines Filterschalldämpfers;
Fig. 2
eine Ansicht des Filterschalldämpfergehäuses von der Anschlussseite;
Fig. 3
einen Teillängsschnitt durch den Filterschalldämpfer;
Fig. 4
eine Ansicht eines Dämpfungsblechs;
Fig. 5
eine Ansicht einer Anordnung von Absorptionselementen;
Fig. 6
einen Teilquerschnitt des Filterschalldämpfers nach der Linie VI-VI gemäss Fig. 3;
The invention is explained below using schematic representations of an embodiment in the drawing.
Show it:
Fig. 1
a partial segment section of a filter silencer;
Fig. 2
a view of the filter silencer housing from the connection side;
Fig. 3
a partial longitudinal section through the filter silencer;
Fig. 4
a view of a damping plate;
Fig. 5
a view of an arrangement of absorption elements;
Fig. 6
a partial cross section of the filter silencer along the line VI-VI of FIG. 3;

Es sind nur die für das Verständnis der Erfindung wesentlichen Elemente gezeigt. Nicht dargestellt ist z.B. die Anordnung des Filterschalldämpfers an der Verdichterseite eines Turboladers und der Anschluss einer Waschvorrichtung für ein Verdichterrad.It is only essential for understanding the invention Elements shown. For example, not shown the order of the filter silencer on the compressor side Turbocharger and the connection of a washing device for one Compressor wheel.

WEG ZUR AUSFÜHRUNG DER ERFINDUNGWAY OF CARRYING OUT THE INVENTION

Fig. 1 zeigt einen kreiszylindrischen Filterschalldämpfer, der im wesentlichen aus einem Gehäuse 2, einer Anzahl, hier dreiunddreissig, Dämpfungselementen 3 und einem Filter 4 aufgebaut ist.
Fig. 2 zeigt das als Monoblock aus Aluminium gegossene Gehäuse 2, dessen Gehäusewand 5 auf der Anschlussseite 20 des Filterschalldämpfers mittels Verbindungsstege 7 mit der Gehäusewand 6 auf der Abschlussseite 21 verbunden ist. Auf den Innenseiten der Gehäusewände 5, 6 sind kreisbogenförmige Nuten 8 eingegossen, die zum Innenradius des Filterschalldämpfers hin schmaler verlaufen. Die Querschnittsfläche eines Verbindungsstegs 7 ist in Form und Krümmung einer Nut 8 gleich, und die Verteilung der dreiunddreissig Nuten 8 und der drei Verbindungsstege 7 ist gleichmässig über den Umfang des Gehäuses in einer 10°-Teilung erfolgt.
Zwischen benachbarten Nuten 8 und zwischen Nuten 8 und einem benachbarten Verbindungssteg 7 sind Stege 14 angeordnet, die eine konstante Breite vom Aussenumfang des Gehäuses 2 zum Innenradius in aufweisen.
Auf der Anschlussseite 20 ist ein Anschlussflansch 22 angeordnet, mit dem der Filterschalldämpfer an der Verdichterseite eines hier nicht dargestellten Abgasturboladers montiert wird.
Wie in Fig. 3 gezeigt, ist in die Gehäusewand 5 auf der Anschlussseite 20 in radialer Richtung ein Rohr 18 mit einem Gewinde 19 eingegossen, dass an dem zur Zentralachse 13 des Gehäuses 2 zeigenden Ende zur Anschlussseite 20 abgewinkelt ist. Dieses Rohr dient als Waschvorrichtung für das hier nicht dargestellte Verdichterrad, und wird direkt am Gewinde 19 mit einer ebenfalls nicht dargestellte Leitung auf der Anschlussseite 20 des Filterschalldämpfers verbunden.
Die Dämpfungselemente 3 werden mit Spannbändern 16, die am Umfang des Gehäuses 2 mittels Schnellverschlüssen 17 verschlossen sind, gegen Herausfallen gesichert. Umgeben ist der Filterschalldämpfer an seinem Umfang von einem ringförmigen Filter 4 aus Polyurethanschaum (PU-Schaum), das Partikel in angesaugter Umgebungsluft herausfiltert. Der Kreisumfang des ringförmigen Filters 4 ist im unmontierten Zustand kleiner als der Aussenumfang des Filterschalldämpfers, sodass das Filter 4, welches aus PU-Schaum gummielastisch gefertigt ist, durch Federkraft am Umfang des Schalldämpfers fixiert wird.
Fig. 1 shows a cylindrical filter silencer, which is essentially composed of a housing 2, a number, here thirty-three, damping elements 3 and a filter 4.
2 shows the housing 2 cast as a monoblock made of aluminum, the housing wall 5 of which is connected on the connection side 20 of the filter muffler by means of connecting webs 7 to the housing wall 6 on the end side 21. Circular arc-shaped grooves 8 are cast in on the inner sides of the housing walls 5, 6 and run narrower towards the inner radius of the filter muffler. The cross-sectional area of a connecting web 7 is the same in shape and curvature of a groove 8, and the distribution of the thirty-three grooves 8 and the three connecting webs 7 has been made uniformly over the circumference of the housing in a 10 ° division.
Between adjacent grooves 8 and between grooves 8 and an adjacent connecting web 7, webs 14 are arranged which have a constant width from the outer circumference of the housing 2 to the inner radius in FIG.
A connection flange 22 is arranged on the connection side 20, with which the filter silencer is mounted on the compressor side of an exhaust gas turbocharger, not shown here.
As shown in FIG. 3, a tube 18 with a thread 19 is cast into the housing wall 5 on the connection side 20 in the radial direction, which is angled toward the connection side 20 at the end pointing to the central axis 13 of the housing 2. This tube serves as a washing device for the compressor wheel, not shown here, and is connected directly to the thread 19 with a line, also not shown, on the connection side 20 of the filter silencer.
The damping elements 3 are secured with straps 16, which are closed on the circumference of the housing 2 by means of quick-release fasteners 17, against falling out. The filter muffler is surrounded on its circumference by an annular filter 4 made of polyurethane foam (PU foam), which filters out particles in the ambient air drawn in. The circumference of the annular filter 4 is smaller than the outer circumference of the filter muffler in the unassembled state, so that the filter 4, which is made of PU-elastic rubber, is fixed to the circumference of the muffler by spring force.

Fig. 4 und 5 zeigen die beiden Bauteile eines Dämpfungselements 3, nämlich ein Dämpfungsblech 9 und ein Absorptionselement 10.
Das Dämpfungsblech 9 wird während der Fertigung in Form eines Rechtecks aus Lochblech mit quadratischen Löchern entlang der Lochstege gestanzt, und weist somit keine freistehenden Stege auf. Anschliessend wird das rechteckförmige Lochblech in der Art gebogen, dass sich eine konkave Fläche 12 ausbildet, an die eine konvexe Fläche 11 anschliesst. An die konvexe Fläche 11 schliesst eine ebene Fläche 15 an, die als Grobfiltersegment 15 abgebogen ist. Die konkave Fläche 12 und die konvexe Fläche 11 verlaufen annähernd parallel, und bilden einen Zwischenraum 23 aus, in den das Absorptionselement 10, Fig. 5, eingesetzt wird. Ein Absorptionselement 10 ist dicker, als der Zwischenraum 23, sodass beim Einsetzen eines Absorptionselementes 10 in den Zwischenraum 23 die Flächen 11, 12 elastisch auseinanderzubiegen sind. Nach dem Einsetzten der Absorptionselemente 10 in den Zwischenraum 23, werden diese aufgrund ihrer Dicke zwischen den Flächen 11, 12 eingeklemmt.
Bei dem verwendeten Material für ein Absorptionselement 10 handelt es sich um einen offenzelligen Schaumstoff, der bei gleichen Dämpfungseigenschaften nur etwa 6 % des spezifischen Gewichts herkömmlicher Absorptionsmaterialien wie Wollfilz aufweist. Die in Fig. 5 dargestellten Absorptionselemente 10 werden rechteckförmig aus Schaumstoffplatten ausgeschnitten und sind hier lediglich, wie in ihrem eingebauten Zustand gebogen gezeigt.
4 and 5 show the two components of a damping element 3, namely a damping plate 9 and an absorption element 10.
The damping plate 9 is punched during manufacture in the form of a rectangle from perforated plate with square holes along the perforated webs, and thus has no free-standing webs. The rectangular perforated plate is then bent in such a way that a concave surface 12 is formed, to which a convex surface 11 adjoins. A flat surface 15 adjoins the convex surface 11 and is bent as a coarse filter segment 15. The concave surface 12 and the convex surface 11 run approximately parallel and form an intermediate space 23 into which the absorption element 10, FIG. 5, is inserted. An absorption element 10 is thicker than the intermediate space 23, so that when an absorption element 10 is inserted into the intermediate space 23, the surfaces 11, 12 are to be elastically bent apart. After the absorption elements 10 have been inserted into the intermediate space 23, they are clamped between the surfaces 11, 12 on account of their thickness.
The material used for an absorption element 10 is an open-cell foam which, with the same damping properties, has only about 6% of the specific weight of conventional absorption materials such as wool felt. The absorption elements 10 shown in FIG. 5 are cut out rectangularly from foam sheets and are shown here only as bent in their installed state.

Fig. 6 zeigt anhand eines Querschnittsegments eines Filterschalldämpfers die Anordnung der Dämpfungselemente 3, bestehend aus dem Dämpfungsblech 9 und dem Absorptionselement 10, in dem kreiszylindrischen Gehäuse 2 mit der Zentralachse 13. Die Dämpfungselemente 3 werden in die Nuten 8 radial eingeschoben und sind in der Art angeordnet, dass ihre Dämpfungsflächen 11, 12 parallel zu der Zentralachse 13 des Gehäuses 2 verlaufen.
Die Breite der Stege 14, und damit auch die Querschnittsfläche der Lufteinlasskanäle 24 zwischen benachbarten Dämpfungselementen 3, ist vom Aussenumfang des Filterschalldämpfers zur Zentralachse 13 hin konstant, wodurch eine konstante Geschwindigkeit angesaugter Umgebungsluft gewährleistet ist. Durch diese Anordnung werden Kompressionsverluste, wie sie bei herkömmlichen Schalldämpfersystemen auftreten, reduziert.
Am Aussenumfang des Gehäuses 2 fügen sich die Grobfiltersegmente 15 der eingebauten Dämpfungsbleche 9 zu einem Grobfilterring zusammen, sodass ein Grobfilter als Einzelbauteil entfällt.
Eine kreisbogenförmige Anordnung der Dämpfungselemente 3 im Gehäuse 2 verlängert die Lufteinlasskanäle 24, und damit den Weg der Schallwellen, im Vergleich zu rein radial verlaufenden Lufteinlasskanälen, wie sie in herkömmlichen Filterschalldämpfern mit gleichem Aussenumfang auftreten. Allein diese Verlängerung des Dämpfungsweges, bei gleichen Abmassen wie herkömmliche Filterschalldämpfer, verbessert die Schalldämpfung.
6 shows the arrangement of the damping elements 3, consisting of the damping plate 9 and the absorption element 10, in the circular cylindrical housing 2 with the central axis 13 on the basis of a cross-sectional segment of a filter muffler. The damping elements 3 are radially inserted into the grooves 8 and are of the type arranged that their damping surfaces 11, 12 run parallel to the central axis 13 of the housing 2.
The width of the webs 14, and thus also the cross-sectional area of the air inlet ducts 24 between adjacent damping elements 3, is constant from the outer circumference of the filter muffler to the central axis 13, which ensures a constant speed of the ambient air drawn in. This arrangement reduces compression losses that occur in conventional silencer systems.
On the outer circumference of the housing 2, the coarse filter segments 15 of the built-in damping plates 9 are combined to form a coarse filter ring, so that a coarse filter as an individual component is not required.
An arc-shaped arrangement of the damping elements 3 in the housing 2 extends the air inlet ducts 24, and thus the path of the sound waves, in comparison to purely radial air inlet ducts, as occur in conventional filter silencers with the same outer circumference. This extension of the damping path alone, with the same dimensions as conventional filter silencers, improves sound absorption.

Insgesamt wird durch die Bauteilreduktion und durch die Verwendung des Melaminschaumes als Absorptionsmaterial nicht nur eine Verringerung des Gesamtgewichtes des Filterschalldämpfers um etwa 20 % erreicht, sondern gleichzeitig der logistische Aufwand reduziert.Overall, due to the reduction in components and the use of melamine foam as an absorption material not only a reduction in the total weight of the filter silencer reached by about 20%, but at the same time the logistical effort reduced.

Selbstverständlich ist die Erfindung nicht auf das gezeigte und beschriebene Ausführungsbeispiel beschränkt.
So ist beispielsweise die Verwendung anderer Dämpfungs- und Filtermaterialien, wie sie oben beschrieben sind, ebenfalls denkbar im Sinn der Erfindung.
Of course, the invention is not limited to the exemplary embodiment shown and described.
For example, the use of other damping and filter materials as described above is also conceivable in the sense of the invention.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

22
Gehäusecasing
33
Dämpfungselementdamping element
44
Filterfilter
55
Gehäusewand auf der AnschlussseiteHousing wall on the connection side
66
Gehäusewand auf der AbschlussseiteHousing wall on the end side
77
Verbindungsstege für 5, 6Connecting bars for 5, 6
88th
Nuten für 3Grooves for 3
99
Dämpfungsblechdamping plate
1010
Absorptionselementabsorbing element
1111
konvexe Dämpfungsflächeconvex damping surface
1212
konkave Dämpfungsflächeconcave damping surface
1313
Zentralachsecentral axis
1414
Steg zwischen zwei NutenBridge between two grooves
1515
GrobfiltersegmentCoarse filter segment
1616
Spannbandstrap
1717
Schnellverschlussquick release
1818
Rohrpipe
1919
Innengewinde in 18Internal thread in 18th
2020
Anschlussseiteterminal side
2121
Abschlussseitecompletion page
2222
Anschlussflanschflange
2323
Zwischenraumgap
2424
LufteinlasskanalAir inlet duct

Claims (9)

  1. A filter muffler with a casing (2), configured as monobloc, in which are arranged a plurality of muffling elements (3) consisting of muffling sheets (9) and absorption elements (10), the casing shape of the filter muffler having a center line (13), characterized in that a muffling element (3) consists of only one muffling sheet (9), which only encloses one absorption element (10), and in that the muffling elements (3) are arranged in radial grooves (8) of the casing walls (5, 6) of a filter muffler casing (2), and in which arrangement the muffling surfaces (11, 12) of the muffling elements (3) are oriented parallel to the center line (13) of the casing.
  2. The filter muffler as claimed in claim 1, characterized in that the muffling elements (3) and the grooves (8) in the casing (2) have a circular arc shape.
  3. The filter muffler as claimed in claim 1, characterized in that air inlet ducts (24) are formed between adjacent muffling elements (3), which air inlet ducts (24) have a constant cross section.
  4. The filter muffler as claimed in claim 1, characterized in that the absorption element (10) consists of a foamed material.
  5. The filter muffler as claimed in claim 1, characterized in that coarse filter segments (15) are arranged on the muffling sheets (9), which coarse filter segments (15) represent, in the installed condition of the muffling elements (3) in the grooves (8), an annular coarse filter.
  6. The filter muffler as claimed in claim 5, characterized in that tightening straps (6) with rapid-action closing features (17) are arranged around the annular coarse filter made up of coarse filter segments (15).
  7. The filter muffler as claimed in claim 1, characterized in that an annular filter (4), consisting of PU foam, is arranged at the periphery of the filter muffler.
  8. The filter muffler as claimed in claim 1, characterized in that the casing (2) has a circular cylindrical shape.
  9. The filter muffler as claimed in claim 1, characterized in that a tube (18) with internal thread (19) is arranged radially in the casing wall (5) at the connection end (20).
EP96810228A 1995-04-24 1996-04-12 Filter-silencer Expired - Lifetime EP0740080B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19514990 1995-04-24
DE19514990A DE19514990B4 (en) 1995-04-24 1995-04-24 filter silencer

Publications (3)

Publication Number Publication Date
EP0740080A2 EP0740080A2 (en) 1996-10-30
EP0740080A3 EP0740080A3 (en) 1998-01-07
EP0740080B1 true EP0740080B1 (en) 2002-09-11

Family

ID=7760211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810228A Expired - Lifetime EP0740080B1 (en) 1995-04-24 1996-04-12 Filter-silencer

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Country Link
US (1) US5756944A (en)
EP (1) EP0740080B1 (en)
JP (1) JP2781168B2 (en)
KR (1) KR100364891B1 (en)
CN (1) CN1084850C (en)
AT (1) ATE224011T1 (en)
CZ (1) CZ286433B6 (en)
DE (2) DE19514990B4 (en)
NO (1) NO961620L (en)

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CN101188325B (en) * 1999-09-20 2013-06-05 弗拉克托斯股份有限公司 Multi-level antenna
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DE10225092B4 (en) * 2001-06-08 2014-10-09 Thermamax Hochtemperaturdämmungen GmbH silencer
US6449947B1 (en) * 2001-10-17 2002-09-17 Fleetguard, Inc. Low pressure injection and turbulent mixing in selective catalytic reduction system
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JP6152612B2 (en) * 2012-12-13 2017-06-28 アルパテック株式会社 Turbocharger silencer and turbocharger using this silencer
KR102160310B1 (en) 2013-03-06 2020-09-28 에이비비 터보 시스템즈 아게 Sound attenuator of an exhaust gas turbocharger
EP2990637B1 (en) * 2014-09-01 2019-01-02 MANN+HUMMEL GmbH Silencer of an intake system of an internal combustion engine and intake system
CN105484980A (en) * 2014-09-19 2016-04-13 任文华 Fan
DE102018100466A1 (en) 2018-01-10 2019-07-11 Abb Turbo Systems Ag Filter silencer for an exhaust gas turbocharger of an internal combustion engine
DE102018100465A1 (en) * 2018-01-10 2019-07-11 Abb Turbo Systems Ag Filter silencer for an exhaust gas turbocharger of an internal combustion engine
DE102018102237A1 (en) * 2018-02-01 2019-08-01 Man Energy Solutions Se Silencer and compressor
CN109404345A (en) * 2018-12-18 2019-03-01 南京磁谷科技有限公司 A kind of air inlet noise-reducing structure of magnetic suspension blower
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Also Published As

Publication number Publication date
DE19514990B4 (en) 2005-06-30
EP0740080A3 (en) 1998-01-07
NO961620D0 (en) 1996-04-23
CN1136143A (en) 1996-11-20
CN1084850C (en) 2002-05-15
CZ286433B6 (en) 2000-04-12
DE59609637D1 (en) 2002-10-17
KR960038143A (en) 1996-11-21
JP2781168B2 (en) 1998-07-30
CZ117196A3 (en) 1996-11-13
ATE224011T1 (en) 2002-09-15
US5756944A (en) 1998-05-26
KR100364891B1 (en) 2003-03-15
EP0740080A2 (en) 1996-10-30
NO961620L (en) 1996-10-25
DE19514990A1 (en) 1996-10-31
JPH08296597A (en) 1996-11-12

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