EP1697640B1 - Fixing element for a silencer - Google Patents
Fixing element for a silencer Download PDFInfo
- Publication number
- EP1697640B1 EP1697640B1 EP04820571A EP04820571A EP1697640B1 EP 1697640 B1 EP1697640 B1 EP 1697640B1 EP 04820571 A EP04820571 A EP 04820571A EP 04820571 A EP04820571 A EP 04820571A EP 1697640 B1 EP1697640 B1 EP 1697640B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silencer
- compressor housing
- connection region
- fixing
- muffler
- 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.)
- Active
Links
- 230000003584 silencer Effects 0.000 title claims description 17
- 238000013016 damping Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
Definitions
- the invention relates to the field of exhaust gas turbochargers.
- Exhaust gas turbochargers for supercharging internal combustion engines have in most cases at the compressor inlet on a filter silencer. These mufflers with attached filter are preferably rigidly connected by means of a mounting flange with the compressor housing. Such a connection is for example from the EP 1 186 781 A1 . Fig. 1 seen.
- the turbocharger is attached either directly or by means of a special foot on the engine console. In most cases, the axial distance between foot and muffler is very large. Engine vibrations can cause the muffler to vibrate too high. This especially if the natural frequency of the muffler is only slightly above those of the turbocharger mounts. In this case, inadmissible vibration peaks occur at the silencer.
- the invention is therefore an object of the invention to take measures in the attachment of the muffler to the compressor housing to prevent inadmissible vibration peaks of the muffler.
- the muffler is rigidly secured to the compressor housing in a first connection region by means of a fastening element.
- a second connection region of the muffler with a bearing surface on a bearing surface on the compressor housing wherein the muffler is acted upon by the support in the second connection region relative to the rigid attachment in the first connection region with a bias.
- Fig. 1 shows a section through the air inlet side of an exhaust gas turbocharger with the compressor housing 2 and arranged at the air inlet of the compressor muffler 1. Not shown is the rotatable about an axis mounted compressor wheel and the entire turbine side of the exhaust gas turbocharger.
- the muffler comprises a base body which carries a plurality of radially arranged sound insulation panels 11.
- the air to be compressed is fed according to the arrows in the radial direction via a arranged on the circumference of the muffler filter 15 and between the soundproofing plates through the air inlet of the compressor.
- the muffler is secured to the compressor housing by a plurality of circumferentially spaced bolts 3 or other suitable fasteners.
- the screws fix the muffler both in the axial and in the radial direction with respect to the compressor housing.
- the silencer For fastening by means of the screws, the silencer has a fastening flange 12 in the radially outer region of the housing wall 14 facing the compressor housing.
- the compressor housing also has a corresponding mounting flange 22 in the radially outer region.
- a support flange 13 is arranged in the radially inner region of said housing wall of the muffler. About this support flange of the muffler is axially supported on a corresponding support flange 23 on the compressor housing.
- the support flange 13 of the muffler is axially biased relative to the mounting flange 12.
- the muffler When mounting the muffler on the compressor housing in the axial direction, it comes first in the region of the support flanges 13 and 23 to a contact between the muffler and the compressor housing.
- the contact region of the mounting flanges 12 and 22 there is a gap in the axial direction, which is closed only by the subsequent tightening of the screws 3.
- the housing of the muffler between mounting and support flange according to the invention slightly warped and thereby applied to the muffler with the axial bias.
- the support under bias has an influence on the natural frequency of the muffler.
- a cantilevered Kragong whose natural frequency increases when it is additionally supported, increases the natural frequency of the present invention mounted on the compressor housing muffler.
- the natural frequency of the muffler can be raised in this way compared to conventionally mounted mufflers by 30 to 60%.
- the axial bias prevents chafing of the muffler to the compressor housing.
- Fig. 2 a) to k) shows a selection of possible embodiments of the in Fig. 1 Dashed circled contact area between the support flange on the muffler 13 and the support flange on the compressor housing 23rd
- the conical shaped bearing surfaces shown in b) and c) have the advantage that they are in the assembly of the muffler, the centering of the muffler with respect to the compressor housing. All of the first three embodiments are also characterized by a very simple manufacturability.
- the embodiments d) to i) have a good sealing effect and a good joint damping. They are all different radially stepped embodiments with different costly to produce support surfaces.
- an O-damping ring made of elastomer or another suitable material can be pressed axially.
Description
Die Erfindung bezieht sich auf das Gebiet der Abgasturbolader.The invention relates to the field of exhaust gas turbochargers.
Sie betrifft die Befestigung eines Schalldämpfers an einem Verdichtergehäuse, gemäß dem Oberbegriff des Anspruchs 1.It relates to the attachment of a muffler to a compressor housing, according to the preamble of
Abgasturbolader zur Aufladung von Verbrennungsmotoren weisen in den meisten Fällen beim Verdichtereintritt einen Filterschalldämpfer auf. Diese Schalldämpfer mit aufgesetztem Filter werden vorzugsweise mittels einem Befestigungsflansch starr mit dem Verdichtergehäuse verbunden. Eine solche Verbindung ist beispielsweise aus der
Der Abgasturbolader wird entweder direkt oder mittels einem speziellen Fuss auf der Motorkonsole befestigt. In den meisten Fällen ist die axiale Distanz zwischen Fuss und Schalldämpfer sehr gross. Durch Motorvibrationen kann der Schalldämpfer zu unzulässig grossen Schwingungen angeregt werden. Dies insbesondere dann, wenn die Eigenfrequenz des Schalldämpfers nur unwesentlich über jenen der Turboladerbefestigungen liegt. In diesem Fall treten beim Schalldämpfer unzulässige Schwingungsüberhöhungen auf.The turbocharger is attached either directly or by means of a special foot on the engine console. In most cases, the axial distance between foot and muffler is very large. Engine vibrations can cause the muffler to vibrate too high. This especially if the natural frequency of the muffler is only slightly above those of the turbocharger mounts. In this case, inadmissible vibration peaks occur at the silencer.
Der Erfindung liegt folglich die Aufgabe zugrunde, bei der Befestigung des Schalldämpfers am Verdichtergehäuse Massnahmen zu treffen, um unzulässige Schwingungsüberhöhungen des Schalldämpfers zu verhindern.The invention is therefore an object of the invention to take measures in the attachment of the muffler to the compressor housing to prevent inadmissible vibration peaks of the muffler.
Erfindungsgemäss wird diese Aufgabe mit einer Befestigung mit den Merkmalen des Patentanspruchs 1 gelöst.According to the invention this object is achieved with a fastening with the features of
Der Schalldämpfer ist in einem ersten Verbindungsbereich mittels einem Befestigungselement starr am Verdichtergehäuse befestigt. In einem zweiten Verbindungsbereich liegt der Schalldämpfer mit einer Auflagefläche auf einer Auflagefläche am Verdichtergehäuse auf, wobei der Schalldämpfer durch die Auflage im zweiten Verbindungsbereich gegenüber der starren Befestigung im ersten Verbindungsbereich mit einer Vorspannung beaufschlagt ist.The muffler is rigidly secured to the compressor housing in a first connection region by means of a fastening element. In a second connection region of the muffler with a bearing surface on a bearing surface on the compressor housing, wherein the muffler is acted upon by the support in the second connection region relative to the rigid attachment in the first connection region with a bias.
Durch die Vorspannung wird die Eigenfrequenz des Schalldämpfers massiv angehoben. Weitere Vorteile ergeben sich aus den abhängigen Ansprüchen.Due to the bias, the natural frequency of the muffler is massively increased. Further advantages emerge from the dependent claims.
Im folgenden sind anhand der Figuren mehrere Ausführungsformen der erfindungsgemässen Befestigung schematisch dargestellt und näher erläutert. In allen Figuren sind gleichwirkende Elemente mit gleichen Bezugszeichen versehen. Es zeigen:
- Fig. 1
- ein Schnitt durch den Schalldämpfer und das Verdichtergehäuse eines Abgasturboladers, welche erfindungsgemäss mittels Befestigungs- und Stützflansch miteinander verbundenen sind, und
- Fig. 2 a) - k)
- vergrösserte Darstellungen des Stützflansches nach
Fig. 1 in verschiedenen Ausführungsformen.
- Fig. 1
- a section through the muffler and the compressor housing of an exhaust gas turbocharger, which are interconnected according to the invention by means of fastening and support flange, and
- Fig. 2 a) - k)
- enlarged views of the support flange after
Fig. 1 in different embodiments.
Der Schalldämpfer umfasst einen Grundkörper, der mehrere radial angeordnete Schalldämmplatten 11 trägt. Die zu verdichtende Luft wird gemäss den Pfeilen in radialer Richtung über einen am Umfang des Schalldämpfers angeordneten Filter 15 und zwischen den Schalldämmplatten hindurch dem Lufteinlass des Verdichters zugeführt.The muffler comprises a base body which carries a plurality of radially arranged
Der Schalldämpfer ist mittels mehrerer, entlang dem Umfang verteilten Schrauben 3 oder anderer geeigneter Befestigungsmittel am Verdichtergehäuse befestigt. Die Schrauben fixieren den Schalldämpfer sowohl in axialer als auch in radialer Richtung bezüglich dem Verdichtergehäuse.The muffler is secured to the compressor housing by a plurality of circumferentially spaced
Zur Befestigung mittels der Schrauben weist der Schalldämpfer im radial äusseren Bereich der dem Verdichtergehäuse zugewandten Gehäusewand 14 einen Befestigungsflansch 12 auf. Das Verdichtergehäuse weist ebenfalls im radial äusseren Bereich einen entsprechenden Befestigungsflansch 22 auf.For fastening by means of the screws, the silencer has a fastening
Im radial inneren Bereich der genannten Gehäusewand des Schalldämpfers ist ein Stützflansch 13 angeordnet. Über diesen Stützflansch wird der Schalldämpfer auf einem entsprechenden Stützflansch 23 am Verdichtergehäuse axial abgestützt.In the radially inner region of said housing wall of the muffler, a
Erfindungsgemäss ist der Stützflansch 13 des Schalldämpfers gegenüber dem Befestigungsflansch 12 axial vorgespannt. Beim Aufsetzen des Schalldämpfers auf das Verdichtergehäuse in axialer Richtung kommt es zuerst im Bereich der Stützflansche 13 und 23 zu einem Kontakt zwischen Schalldämpfer und Verdichtergehäuse. Im Kontaktbereich der Befestigungsflansche 12 und 22 besteht eine Lücke in axialer Richtung, welche erst durch das anschliessende Anziehen der Schrauben 3 geschlossen wird. Durch das Schliessen der Lücke wird das Gehäuse des Schalldämpfers zwischen Befestigungs- und Stützflansch erfindungsgemäss geringfügig verzogen und dadurch der Schalldämpfer mit der axialen Vorspannung beaufschlagt.According to the invention, the
Die Abstützung unter Vorspannung hat einen Einfluss auf die Eigenfrequenz des Schalldämpfers. Entsprechend einem einseitig eingespannten Kragträger, dessen Eigenfrequenz sich erhöht, wenn er zusätzlich abgestützt wird, erhöht sich die Eigenfrequenz des erfindungsgemäss am Verdichtergehäuse befestigten Schalldämpfers. Die Eigenfrequenz des Schalldämpfers kann auf diese weise gegenüber herkömmlich befestigten Schalldämpfern um 30 bis 60% angehoben werden.The support under bias has an influence on the natural frequency of the muffler. According to a cantilevered Kragträger whose natural frequency increases when it is additionally supported, increases the natural frequency of the present invention mounted on the compressor housing muffler. The natural frequency of the muffler can be raised in this way compared to conventionally mounted mufflers by 30 to 60%.
Ausserdem verhindert die axiale Vorspannung ein Scheuern des Schalldämpfers an dem Verdichtergehäuse.In addition, the axial bias prevents chafing of the muffler to the compressor housing.
Gegenüber den in einer Ebene senkrecht zur Achse angeordneten Auflageflächen gemäss a) weisen die in b) und c) dargestellten konisch geformten Auflageflächen den Vorteil auf, dass sie bei der Montage des Schalldämpfers die Zentrierung des Schalldämpfers bezüglich dem Verdichtergehäuse erleichtern. Alle der ersten drei Ausführungsformen zeichnen sich zudem durch eine sehr einfache Herstellbarkeit aus.Compared with the arranged in a plane perpendicular to the axis bearing surfaces according to a), the conical shaped bearing surfaces shown in b) and c) have the advantage that they are in the assembly of the muffler, the centering of the muffler with respect to the compressor housing. All of the first three embodiments are also characterized by a very simple manufacturability.
Die Ausführungsformen d) bis i) weisen eine gute Dichtwirkung sowie eine gute Fügestellendämpfung auf. Es sind alles verschiedene radial gestufte Ausführungsformen mit unterschiedlich aufwändig herzustellenden Auflageflächen.The embodiments d) to i) have a good sealing effect and a good joint damping. They are all different radially stepped embodiments with different costly to produce support surfaces.
Um noch weiter verbesserte Dicht- und Dämpfungseigenschaft zu erhalten kann anstelle einer Stufe oder Nut/Kammverbindung wie in k) dargestellt in entsprechenden Nuten oder Halbrundnuten ein O-Dämpfungsring aus Elastomer oder einem anderen geeigneten Material axial verpresst werden.In order to obtain even further improved sealing and damping properties, instead of a step or groove / comb connection as shown in k) in corresponding grooves or half-round grooves, an O-damping ring made of elastomer or another suitable material can be pressed axially.
Bis auf die erste, einfachste Ausführungsform mit den senkrecht zur Achse angeordneten Auflageflächen weisen alle dargestellten Ausführungsformen einen Formschluss in radialer Richtung auf, was eine zusätzliche Stabilisierung von Schalldämpfer und Verdichtergehäuse zur Folge hat.Except for the first, simplest embodiment with the support surfaces arranged perpendicular to the axis, all embodiments shown have a positive connection in the radial direction, which results in additional stabilization of the muffler and compressor housing.
- 11
- Schalldämpfersilencer
- 1111
- Schalldämmplattenacoustic tiles
- 1212
- Befestigungsflanschmounting flange
- 1313
- Stützflansch mit AuflageflächeSupport flange with support surface
- 1414
- SchalldärnpfergehäusewandSchalldärnpfergehäusewand
- 1515
- Filterfilter
- 22
- Verdichtergehäusecompressor housing
- 2222
- Befestigungsflanschmounting flange
- 2323
- Stützflansch mit AuflageflächeSupport flange with support surface
- 33
- Befestigungselement, SchraubeFixing element, screw
- 44
- Dämpfungsringdamping ring
Claims (6)
- Fixing for fixing a silencer (1) to the compressor housing (2) of an exhaust gas turbocharger, the silencer being fixed rigidly to the compressor housing in a first connection region (12, 22) by means of a fixing element (3), characterized in that the silencer, in a second connection region (13, 23), lies with a bearing surface on a bearing surface on the compressor housing, and in that the silencer is acted upon as a result of bearing contact in the second connection region by a prestress with respect to the rigid fixing in the first connection region.
- Fixing according to Claim 1, characterized in that the silencer has in the first connection region a fixing flange (12), by means of which the silencer is fixed to the compressor housing (2, 22) by means of the fixing element (3), and in that the silencer has in the second connection region a supporting flange (13), with which the silencer is supported on the compressor housing (2, 23), and in that the supporting flange is acted upon with an axial prestress with respect to the fixing flange.
- Fixing according to either one of Claims 1 and 2, characterized in that the silencer and the compressor housing have conical bearing surfaces in the second connection region.
- Fixing according to one of Claims 1 to 3, characterized in that the silencer and the compressor housing have radially stepped bearing surfaces in the second connection region.
- Fixing according to Claim 4, characterized in that the silencer and the compressor housing have in the second connection region groove/comb bearing surfaces engaging one in the other.
- Fixing according to Claim 4, characterized in that, in the case of the silencer and compressor housing, grooves are introduced into the bearing surfaces in the second connection region, and in that a damping ring (4) is arranged in the grooves.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10360770A DE10360770A1 (en) | 2003-12-23 | 2003-12-23 | muffler mounting |
| PCT/CH2004/000730 WO2005061903A1 (en) | 2003-12-23 | 2004-12-10 | Fixing element for a silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1697640A1 EP1697640A1 (en) | 2006-09-06 |
| EP1697640B1 true EP1697640B1 (en) | 2012-10-24 |
Family
ID=34706484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04820571A Active EP1697640B1 (en) | 2003-12-23 | 2004-12-10 | Fixing element for a silencer |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1697640B1 (en) |
| JP (1) | JP4616278B2 (en) |
| KR (1) | KR20060111595A (en) |
| CN (1) | CN100564892C (en) |
| DE (1) | DE10360770A1 (en) |
| WO (1) | WO2005061903A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1884627A1 (en) | 2006-08-04 | 2008-02-06 | ABB Turbo Systems AG | Granular material damper |
| KR101050987B1 (en) * | 2006-08-24 | 2011-07-21 | 에이비비 터보 시스템즈 아게 | Fixing filter muffler |
| DE102020207638A1 (en) | 2020-06-19 | 2021-12-23 | Mahle International Gmbh | Exhaust gas turbocharger arrangement with an exhaust gas turbocharger and with an actuator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4204586A (en) * | 1975-12-11 | 1980-05-27 | Bbc Brown Boveri & Company Limited | Silencer on the intake side of a compressor with assembly of axially spaced annular sound-damping elements |
| GB8905894D0 (en) * | 1989-03-15 | 1989-04-26 | Rolls Royce Plc | Fluid-tight joints |
| EP1186781B2 (en) * | 2000-09-08 | 2012-05-30 | ABB Turbo Systems AG | Filter silencer mounting device for turbo charger inlet |
| EP1586745B1 (en) * | 2004-04-13 | 2015-07-29 | ABB Turbo Systems AG | Compressor casing |
-
2003
- 2003-12-23 DE DE10360770A patent/DE10360770A1/en not_active Withdrawn
-
2004
- 2004-12-10 KR KR1020067012394A patent/KR20060111595A/en not_active Application Discontinuation
- 2004-12-10 JP JP2006545880A patent/JP4616278B2/en active Active
- 2004-12-10 WO PCT/CH2004/000730 patent/WO2005061903A1/en not_active Application Discontinuation
- 2004-12-10 EP EP04820571A patent/EP1697640B1/en active Active
- 2004-12-10 CN CNB2004800376207A patent/CN100564892C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN100564892C (en) | 2009-12-02 |
| JP4616278B2 (en) | 2011-01-19 |
| DE10360770A1 (en) | 2005-07-28 |
| WO2005061903A1 (en) | 2005-07-07 |
| CN1894509A (en) | 2007-01-10 |
| JP2007515592A (en) | 2007-06-14 |
| KR20060111595A (en) | 2006-10-27 |
| EP1697640A1 (en) | 2006-09-06 |
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