EP1978259A2 - Silencer for use in a compressor - Google Patents

Silencer for use in a compressor Download PDF

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Publication number
EP1978259A2
EP1978259A2 EP08006884A EP08006884A EP1978259A2 EP 1978259 A2 EP1978259 A2 EP 1978259A2 EP 08006884 A EP08006884 A EP 08006884A EP 08006884 A EP08006884 A EP 08006884A EP 1978259 A2 EP1978259 A2 EP 1978259A2
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EP
European Patent Office
Prior art keywords
housing
mounting flange
flange
muffler
compressor
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.)
Granted
Application number
EP08006884A
Other languages
German (de)
French (fr)
Other versions
EP1978259B1 (en
EP1978259A3 (en
Inventor
Ingo Kaltwasser
Heinrich Lampe
Hans-Hubert Schübler
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.)
Trane Technologies International Ltd
Original Assignee
GHH Rand Schraubenkompressoren GmbH
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Publication date
Application filed by GHH Rand Schraubenkompressoren GmbH filed Critical GHH Rand Schraubenkompressoren GmbH
Publication of EP1978259A2 publication Critical patent/EP1978259A2/en
Publication of EP1978259A3 publication Critical patent/EP1978259A3/en
Application granted granted Critical
Publication of EP1978259B1 publication Critical patent/EP1978259B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to a silencer according to the preamble of claim 1.
  • the muffler is intended for use in screw compressors which are installed on silo vehicles for the transport of dusty or free flowing bulk materials to provide the required compressed air for loosening the bulk material in the silo and for the pneumatic discharge of the bulk material.
  • screw compressors which are installed on silo vehicles for the transport of dusty or free flowing bulk materials to provide the required compressed air for loosening the bulk material in the silo and for the pneumatic discharge of the bulk material.
  • a problem with this and other uses of screw compressors is their very high noise level. To limit this, it is necessary to pass at least the compressed air discharged at the pressure side of the compressor through a silencer.
  • mufflers are known according to the preamble of claim 1, which have at their inlet opening a mounting flange which can be connected to a corresponding flange at the pressure outlet of the compressor by fastening means, for example screws, so that the muffler directly, without interposition of lines, can be mounted on the compressor.
  • the invention has for its object to form a muffler, which is intended for mounting on a compressor, so that with simple means the angular position of the muffler can be changed continuously relative to the compressor unit.
  • the mounting flange of the muffler with which the muffler can be flanged to the pressure outlet of the compressor, not rigidly formed on the housing of the muffler, but relative to the housing continuously rotatable and fixable in any desired angular position, can during assembly of the muffler on the screw compressor the each most favorable orientation of the muffler, in adaptation to the respective existing installation conditions, be made easily with a few simple steps. This will make it possible in virtually all cases to position the muffler relative to the compressor so that installation on a truck chassis is possible without having to make these modifications.
  • the claims 2 to 4 relate to a particularly advantageous embodiment of the continuously rotatable mounting of the mounting flange and its attachment to the housing in any angular position.
  • Fig. 1 shows in side view a compressor 1, the z. B. may be formed as a two-stage screw compressor and a drive shaft 3, a suction inlet 5 and at its top a pressure outlet 7, which is surrounded by a flange 9.
  • the muffler 11 On the compressor 1, a generally denoted by 11 muffler for the emerging from the compressor 1 compressed air is placed.
  • the muffler 11 has a housing 13 which is generally box-shaped with a flat, mutually parallel top and bottom. At the bottom there is an inflow opening 15, which is surrounded by a mounting flange 17, which is suitable for the connection flange provided on the compressor 1 9 is formed and can be attached to this by screws in a known manner.
  • Fig. 2 On the underside of the housing 13 is a circular, recessed seat 21 and a housing opening 20 surrounded by this for receiving the mounting flange 17, which is attached or integrally formed with one at its rear hollow cylindrical flange core 23 forms a detachable from the housing 13 unit.
  • the mounting flange 17 surrounds the inflow opening 15.
  • an opening or a window 25 is provided, through which the inflowing compressed air from the tubular flange core 23 enters the housing 13 of the muffler.
  • the hollow cylindrical Flanschkern mainly for reasons of soundproofing, closed by a solid bottom wall 24.
  • a recessed, circular seat 27 for receiving a flange plate 29 serving as an abutment plate.
  • Mounting flange 17, flange core 23 and flange cover 29 have openings 31, 33 (see FIG Fig. 3 ), for receiving clamping screws (not shown), with which the mounting flange 17 and the flange 29 are connected to each other and against the housing 13, ie against the flat bottom surface of the seats 21, 27 can be tightened.
  • this expansion bolts are used, which are tightened with a predetermined torque to produce a defined surface pressure.
  • sealing rings 35 are arranged in the seats 21 and 20 .
  • the number of clamping screws can z. B. four.
  • clamping screws When tightening the clamping screws mounting flange 17 and flange 29 are in their seats 21, 27 preferably flush with the housing 13.
  • the length of the clamping screws is greater than the height of the muffler housing 13 so that the inserted into the openings 33, 31 clamping screws down protrude beyond the mounting flange 15 and in corresponding threaded holes (not shown) of the connecting flange 9 of the compressor 1 can be screwed.
  • the clamping screws thus have a dual function, namely to clamp the mounting flange 17 and the flange 29 against each other and against the seals 35 in the seats 21, 27 and to attach the entire muffler to the flange 7 of the compressor.
  • the housing 13 can be rotated relative to the mounting flange 17 about the axis AA of the inlet opening 15 and fixed by tightening the clamping screws in any angular position relative to the compressor 1.
  • FIG. 4 and FIG. 5 show top views of the top of the compressor 1 with attached muffler 11, wherein the compressor is mounted on the chassis 37 of a transport vehicle.
  • Fig. 5 illustrated in comparison to Fig. 4 How the silencer 11 can be infinitely angularly adjusted relative to the compressor 1 after loosening of the mounting flange 17 against the housing 13 clamping screws and fixed by tightening the clamping screws in a desired angular position relative to the compressor 1.
  • the angular adjustment of the muffler takes place about an axis of rotation which is concentric with the central axis of the inlet opening 15 of the muffler or the central axis of the connecting flange 9 of the compressor ( Fig. 1 ).
  • the corners of the housing 13 of the muffler 11 are at least partially rounded, as indicated at 39.
  • This construction of the muffler 11 with removable and interchangeable mounting flange 17 and flange 29 allows in addition to the continuous angle adjustment about the axis AA in Fig. 2 an additional degree of freedom of adjustment of the muffler 11 relative to the compressor 1, namely by turning by 180 ° about an axis BB perpendicular to the axis AA (see. Fig. 2 ).
  • the horizontally cut representation of the muffler 11 in Fig. 4 also illustrates an inventive preferred design of the flow path of the compressed air in the muffler from the inlet port 15 to the outlet port 19.
  • the inserted into the housing 13 tubular flange core 23 is over more than half, preferably about three quarters of its circumference of a curved wall 41 and an adjoining part of the housing wall surrounded so that they have a substantially constant distance from the peripheral surface of the Flanschkerns 23, so that a ring channel 43 is formed of substantially constant width.
  • As flow obstacles lining with insulating material, metal membranes or the like. (Not shown) is provided.
  • the second advantage of the illustrated construction of the muffler is that by suitably dimensioning the width of the annular channel 43, and choosing a suitable material for the walls bounding it, the annular channel 43 can be acoustically tuned to the frequency spectrum to be attenuated, so that an additional sound reduction is achieved.
  • the compressed air After the compressed air has passed through the sound-absorbing flow path in the housing 13 of the muffler, it passes to the outlet opening 19, via a housing projection 47, in which a deflection of the compressed air by 90 ° upwards.
  • the deflection lug 47 is attached to the main part of the housing 13 of the muffler 11 by fastening screws 49 and can be removed after loosening the screws 49 and in at least one rotated by 180 ° position, possibly also in two rotated by 90 ° positions, again attached, so that the outflow direction of the silenced compressed air is directed downward or to the side.

Abstract

A compressor has a silencer with a housing (13) having an inlet (15) and outlet (19). The inlet is surrounded by an installation flange (17) coupled to a flange (9) at the compressor outlet. During fitting the installation flange (17) can be rotated as required and then locked in position on the housing (13).

Description

Die Erfindung betrifft einen Schalldämpfer gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a silencer according to the preamble of claim 1.

Vorzugsweise, jedoch nicht ausschließlich, ist der Schalldämpfer zur Verwendung bei Schraubenkompressoren vorgesehen, die an Silofahrzeugen für den Transport von staubförmigen bzw. rieselfähigen Schüttgütern eingebaut werden, um die erforderliche Druckluft zum Auflockern des Schüttgutes im Silo und zum pneumatischen Austragen des Schüttgutes zu liefern. Ein Problem bei dieser und anderen Verwendungen von Schraubenkompressoren ist deren sehr hoher Geräuschpegel. Um diesen zu begrenzen, ist es nötig, mindestens die an der Druckseite des Kompressors ausströmende Druckluft durch einen Schalldämpfer zu leiten. Hierzu sind Schalldämpfer gemäß dem Oberbegriff des Anspruchs 1 bekannt, die an ihrer Einströmöffnung einen Montageflansch aufweisen, der mit einem entsprechenden Flansch am Druckauslass des Kompressors durch Befestigungsmittel, zum Beispiel Schrauben, verbunden werden kann, so dass der Schalldämpfer unmittelbar, ohne Zwischenfügung von Leitungen, an dem Kompressor montiert werden kann.Preferably, but not exclusively, the muffler is intended for use in screw compressors which are installed on silo vehicles for the transport of dusty or free flowing bulk materials to provide the required compressed air for loosening the bulk material in the silo and for the pneumatic discharge of the bulk material. A problem with this and other uses of screw compressors is their very high noise level. To limit this, it is necessary to pass at least the compressed air discharged at the pressure side of the compressor through a silencer. For this purpose, mufflers are known according to the preamble of claim 1, which have at their inlet opening a mounting flange which can be connected to a corresponding flange at the pressure outlet of the compressor by fastening means, for example screws, so that the muffler directly, without interposition of lines, can be mounted on the compressor.

Für den Einbau einer derartigen Kompressoreinheit mit einem angeflanschten druckseitigen Schalldämpfer an Lkw-Fahrgestellen steht in der Regel ein sehr begrenzter Raum zur Verfügung, wobei der Einbau häufig durch fahrzeugseitige Hindernisse wie Traversen, Achslenker, Verstärkungsbleche usw. behindert wird. Um den verschiedenen, in der Praxis auftretenden Einbauverhältnissen gerecht zu werden, benötigt man Kompressoreinheiten, deren Schalldämpfer in unterschiedlichen Winkelstellungen am Kompressor befestigt sind. Bei den bisher bekannten Konstruktionen kann der Schalldämpfer in der Regel nur in einer einzigen festgelegen Winkelstellung am Kompressor montiert werden. Allenfalls ist, z. B. bei der Verwendung von vier Befestigungsschrauben für die Flanschverbindung, eine Montage in vier diskreten, um 90° versetzten Winkelstellungen möglich. Um allen in der Praxis auftretenden Einbauverhältnissen gerecht zu werden, müsste eine Vielzahl von Druckluftschalldämpfern bereitgestellt und Lager gehalten werden, die sich jeweils durch die Winkelorientierung des Schalldämpfers relativ zum Kompressor unterscheiden.For the installation of such a compressor unit with a flanged pressure-side muffler to truck chassis is usually a very limited space available, the installation is often hampered by vehicle-side obstacles such as traverses, wishbones, reinforcing plates, etc. In order to meet the various installation conditions occurring in practice, one needs compressor units whose mufflers are fastened in different angular positions on the compressor. In the previously known constructions of the muffler can be mounted in the rule only in a single fixed angular position on the compressor. At most, z. As with the use of four mounting screws for the flange, a mounting in four discrete, offset by 90 ° angular positions possible. To meet all installation conditions occurring in practice, would have a variety of compressed air silencers be provided and held bearings, which differ in each case by the angular orientation of the muffler relative to the compressor.

Der Erfindung liegt die Aufgabe zugrunde, einen Schalldämpfer, der für die Montage an einem Kompressor bestimmt ist, so auszubilden, dass mit einfachen Mitteln die Winkelstellung des Schalldämpfers relativ zur Kompressoreinheit stufenlos geändert werden kann.The invention has for its object to form a muffler, which is intended for mounting on a compressor, so that with simple means the angular position of the muffler can be changed continuously relative to the compressor unit.

Die erfindungsgemäße Lösung der Aufgabe ist im Anspruch 1 angegeben. Die abhängigen Ansprüche 2 bis 9 beziehen sich auf vorteilhafte Weiterausgestaltungen der Erfindung.The achievement of the object according to the invention is specified in claim 1. The dependent claims 2 to 9 relate to advantageous developments of the invention.

Da erfindungsgemäß der Montageflansch des Schalldämpfers, mit dem der Schalldämpfer am Druckauslass des Kompressors angeflanscht werden kann, nicht starr am Gehäuse des Schalldämpfers ausgebildet, sondern relativ zum Gehäuse stufenlos drehbar und in jeder gewünschten Winkelstellung festlegbar ist, kann bei der Montage des Schalldämpfers am Schraubenkompressor die jeweils günstigste Ausrichtung des Schalldämpfers, in Anpassung an die jeweils vorliegenden Einbauverhältnisse, problemlos mit wenigen Handgriffen vorgenommen werden. Hierdurch wird es in praktisch allen Fällen möglich sein, den Schalldämpfer relativ zum Kompressor so zu positionieren, dass ein Einbau an einem Lkw-Fahrgestell möglich ist, ohne an diesem Umbauten vornehmen zu müssen.Since according to the invention the mounting flange of the muffler, with which the muffler can be flanged to the pressure outlet of the compressor, not rigidly formed on the housing of the muffler, but relative to the housing continuously rotatable and fixable in any desired angular position, can during assembly of the muffler on the screw compressor the each most favorable orientation of the muffler, in adaptation to the respective existing installation conditions, be made easily with a few simple steps. This will make it possible in virtually all cases to position the muffler relative to the compressor so that installation on a truck chassis is possible without having to make these modifications.

Die Ansprüche 2 bis 4 beziehen sich auf eine besonders vorteilhafte Ausgestaltung für die stufenlos drehbare Lagerung des Montageflansches und seine Festlegung am Gehäuse in beliebiger Winkelstellung.The claims 2 to 4 relate to a particularly advantageous embodiment of the continuously rotatable mounting of the mounting flange and its attachment to the housing in any angular position.

Durch die Merkmale der Ansprüche 5 und 6 wird gewährleistet, dass die Strömungsverhältnisse im Gehäuse des Schalldämpfers, und damit auch die Schalldämpfungswirkung, von der Winkelstellung des Montageflansches weitgehend unbeeinflusst bleiben.Due to the features of claims 5 and 6 ensures that the flow conditions in the housing of the muffler, and thus the sound damping effect, remain largely unaffected by the angular position of the mounting flange.

Durch das Merkmal des Anspruchs 9 wird zusätzlich zu der Möglichkeit der Winkelverstellung des Schalldämpfers um die Achse der Einströmöffnung eine weitere Möglichkeit geschaffen, die Position des Schalldämpfers relativ zum Kompressor zu verändern, und zwar durch eine Drehung des Schalldämpfers um 180° um eine zur Achse der Einströmöffnung rechtwinklige Achse.The feature of claim 9, in addition to the possibility of angular adjustment of the muffler around the axis of the inflow opening created a further possibility to change the position of the muffler relative to the compressor, and although by a rotation of the muffler by 180 ° about an axis perpendicular to the axis of the inflow opening axis.

Eine Ausführungsform der Erfindung wird Anhand der Zeichnungen näher erläutert.An embodiment of the invention will be explained with reference to the drawings.

Es zeigt:

Fig. 1
die Seitenansicht eines Schraubenkompressors mit daran befestigtem Schalldämpfer, der im Längsschnitt dargestellt ist;
Fig. 2
einen schematischen Längsschnitt des Schalldämpfers, teilweise zerlegt;
Fig. 3
die herausnehmbaren Flanschteile des Schalldämpfers im Schnitt gemäß einer gegenüber Fig. 2 gedrehten axialen Schnittebene;
Fig. 4
eine Darstellung des Schalldämpfers von oben, teilweise im Schnitt etwa entlang der Linie IV-IV von Fig. 1;
Fig. 5
eine Schnittdarstellung des Schalldämpfers entsprechend Fig. 4, jedoch mit einer gegenüber Fig. 4 winkelversetzten Ausrichtung des Schalldämpfers.
It shows:
Fig. 1
the side view of a screw compressor with attached muffler, which is shown in longitudinal section;
Fig. 2
a schematic longitudinal section of the muffler, partially disassembled;
Fig. 3
the removable flange of the muffler in section according to one opposite Fig. 2 rotated axial section plane;
Fig. 4
a view of the muffler from above, partially in section approximately along the line IV-IV of Fig. 1 ;
Fig. 5
a sectional view of the muffler accordingly Fig. 4 but with one opposite Fig. 4 angular misalignment of the muffler.

Fig. 1 zeigt in Seitenansicht einen Kompressor 1, der z. B. als zweistufiger Schraubenkompressor ausgebildet sein kann und eine Antriebswelle 3, einen Ansaugeinlass 5 und an seiner Oberseite einen Druckauslass 7 aufweist, der von einem Anschlussflansch 9 umgeben ist. Fig. 1 shows in side view a compressor 1, the z. B. may be formed as a two-stage screw compressor and a drive shaft 3, a suction inlet 5 and at its top a pressure outlet 7, which is surrounded by a flange 9.

Auf den Kompressor 1 ist ein allgemein mit 11 bezeichneter Schalldämpfer für die aus dem Kompressor 1 austretende Druckluft aufgesetzt. Der Schalldämpfer 11 hat ein Gehäuse 13, das allgemein kastenförmig mit ebener, zueinander paralleler Ober- und Unterseite ausgebildet ist. An der Unterseite befindet sich eine Einströmöffnung 15, die von einem Montageflansch 17 umgeben ist, der passend zu dem am Kompressor 1 vorgesehenen Anschlussflansch 9 ausgebildet ist und an diesem durch Schrauben in bekannter Weise befestigt werden kann. An der Oberseite des Gehäuses 13 des Schalldämpfers 11, und seitlich versetzt von der Einströmöffnung 15, befindet sich eine Ausströmöffnung 19. Von der Einlassöffnung 15 zur Auslassöffnung 19 strömt die Druckluft entlang einem durch Pfeile in Fig. 1 angedeuteten Strömungsweg, der im Wesentlichen parallel zur Ober- und Unterseite des Gehäuses 13, also rechtwinklig zu den Achsen der Einlassöffnung 15 und Auslassöffnung 19 verläuft und vor der Auslassöffnung 19 um 90° nach oben umgelenkt wird.On the compressor 1, a generally denoted by 11 muffler for the emerging from the compressor 1 compressed air is placed. The muffler 11 has a housing 13 which is generally box-shaped with a flat, mutually parallel top and bottom. At the bottom there is an inflow opening 15, which is surrounded by a mounting flange 17, which is suitable for the connection flange provided on the compressor 1 9 is formed and can be attached to this by screws in a known manner. At the top of the housing 13 of the muffler 11, and laterally offset from the inflow opening 15, there is an outflow opening 19. From the inlet opening 15 to the outlet opening 19, the compressed air flows along one by arrows in Fig. 1 indicated flow path, which is substantially parallel to the top and bottom of the housing 13, that is perpendicular to the axes of the inlet opening 15 and outlet opening 19 and is deflected in front of the outlet opening 19 by 90 ° upwards.

Fig. 2 zeigt in Längsschnitt den teilweise in seine Bestandteile zerlegten Schalldämpfer 11. An der Unterseite des Gehäuses 13 befindet sich ein kreisrunder, vertiefter Sitz 21 und eine von diesem umgebene Gehäuseöffnung 20 für die Aufnahme des Montageflansches 17, der zusammen mit einem an seiner Rückseite angebrachten oder angeformten hohlzylindrischen Flanschkern 23 eine aus dem Gehäuse 13 herausnehmbare Einheit bildet. Der Montageflansch 17 umgibt die Einströmöffnung 15. In der Wandung des Flanschkerns 23 ist eine Öffnung oder ein Fenster 25 vorgesehen, durch das die zuströmende Druckluft aus dem rohrförmigen Flanschkern 23 in das Gehäuse 13 des Schalldämpfers eintritt. An seinem oberen Ende ist der hohlzylindrische Flanschkern, hauptsächlich aus Gründen der Schalldämpfung, durch eine massive Bodenwand 24 verschlossen. Fig. 2 On the underside of the housing 13 is a circular, recessed seat 21 and a housing opening 20 surrounded by this for receiving the mounting flange 17, which is attached or integrally formed with one at its rear hollow cylindrical flange core 23 forms a detachable from the housing 13 unit. The mounting flange 17 surrounds the inflow opening 15. In the wall of the Flanschkerns 23, an opening or a window 25 is provided, through which the inflowing compressed air from the tubular flange core 23 enters the housing 13 of the muffler. At its upper end, the hollow cylindrical Flanschkern, mainly for reasons of soundproofing, closed by a solid bottom wall 24.

Auf der Oberseite des Gehäuses 13, und koaxial zu dem Sitz 21, befindet sich ebenfalls ein vertiefter, kreisrunder Sitz 27 für die Aufnahme eines als Widerlagerplatte dienenden Flanschdeckels 29. Montageflansch 17, Flanschkern 23 und Flanschdeckel 29 weisen Öffnungen 31, 33 (siehe Fig. 3), für die Aufnahme von Spannschrauben (nicht dargestellt) auf, mit denen der Montageflansch 17 und der Flanschdeckel 29 miteinander verbunden und gegen das Gehäuse 13, d. h. gegen die plane Bodenfläche der Sitze 21, 27 festgezogen werden können. Vorzugsweise werden hierfür Dehnschrauben verwendet, die mit vorgegebenem Drehmoment festgezogen werden, um eine definierte Flächenpressung zu erzeugen. In den Sitzen 21 und 20 sind vorzugsweise Dichtungsringe 35 angeordnet. Die Anzahl der Spannschrauben kann z. B. vier betragen.On the upper side of the housing 13, and coaxial with the seat 21, there is also a recessed, circular seat 27 for receiving a flange plate 29 serving as an abutment plate. Mounting flange 17, flange core 23 and flange cover 29 have openings 31, 33 (see FIG Fig. 3 ), for receiving clamping screws (not shown), with which the mounting flange 17 and the flange 29 are connected to each other and against the housing 13, ie against the flat bottom surface of the seats 21, 27 can be tightened. Preferably, this expansion bolts are used, which are tightened with a predetermined torque to produce a defined surface pressure. In the seats 21 and 20 preferably sealing rings 35 are arranged. The number of clamping screws can z. B. four.

Bei festgezogenen Spannschrauben liegen der Montageflansch 17 und Flanschdeckel 29 in ihren Sitzen 21, 27 jeweils vorzugsweise oberflächenbündig mit dem Gehäuse 13. Die Länge der Spannschrauben ist größer als die Höhe des Schalldämpfergehäuses 13, so dass die in die Öffnungen 33, 31 eingeführten Spannschrauben nach unten über den Montageflansch 15 hinausragen und in entsprechende Gewindebohrungen (nicht dargestellt) des Anschlussflansches 9 des Kompressors 1 eingeschraubt werden können. Die Spannschrauben haben somit eine doppelte Funktion, nämlich den Montageflansch 17 und den Flanschdeckel 29 gegeneinander und gegen die Dichtungen 35 in den Sitzen 21, 27 zu verspannen und den gesamten Schalldämpfer am Anschlussflansch 7 des Kompressors zu befestigen.When tightening the clamping screws mounting flange 17 and flange 29 are in their seats 21, 27 preferably flush with the housing 13. The length of the clamping screws is greater than the height of the muffler housing 13 so that the inserted into the openings 33, 31 clamping screws down protrude beyond the mounting flange 15 and in corresponding threaded holes (not shown) of the connecting flange 9 of the compressor 1 can be screwed. The clamping screws thus have a dual function, namely to clamp the mounting flange 17 and the flange 29 against each other and against the seals 35 in the seats 21, 27 and to attach the entire muffler to the flange 7 of the compressor.

Wenn der aus dem Montageflansch 17 und dem rohrförmigen Flanschkern 23 bestehende Einsatz von unten und der Flanschdeckel 25 von oben in das Gehäuse 13 eingesetzt ist und die Spannschrauben in die Öffnungen 33, 31 eingeführt und in die Gewindebohrungen des kompressorseitigen Anschlussflansches 7 eingeschraubt, aber noch nicht festgezogen sind, dann kann bei gelockerten Spannschrauben das Gehäuse 13 relativ zum Montageflansch 17 um die Achse A-A der Einlassöffnung 15 stufenlos gedreht und durch Festziehen der Spannschrauben in jeder beliebigen Winkelstellung relativ zum Kompressor 1 festgelegt werden.If the existing from the mounting flange 17 and the tubular flange core 23 insert from below and the flange cover 25 is inserted from above into the housing 13 and the clamping screws inserted into the openings 33, 31 and screwed into the threaded holes of the compressor side flange 7, but not yet are tightened, then with loose clamping screws, the housing 13 can be rotated relative to the mounting flange 17 about the axis AA of the inlet opening 15 and fixed by tightening the clamping screws in any angular position relative to the compressor 1.

Fig. 4 und Fig. 5 zeigen Draufsichten von oben auf den Kompressor 1 mit aufgesetztem Schalldämpfer 11, wobei der Kompressor am Fahrgestell 37 eines Transportfahrzeuges montiert ist. Fig. 5 veranschaulicht im Vergleich zu Fig. 4, wie der Schalldämpfer 11 nach Lockerung der den Montageflansch 17 gegen das Gehäuse 13 anpressenden Spannschrauben relativ zum Kompressor 1 stufenlos winkelverstellt und durch Festziehen der Spannschrauben in einer gewünschten Winkelposition relativ zum Kompressor 1 festgelegt werden kann. Damit ist eine Anpassung an die am jeweiligen Fahrzeug vorliegenden Einbauverhältnisse möglich. Die Winkelverstellung des Schalldämpfers erfolgt um eine Drehachse, die konzentrisch zu der Mittelachse der Einlassöffnung 15 des Schalldämpfers bzw. der Mittelachse des Anschlussflansches 9 des Kompressors (Fig. 1) ist. Vorzugsweise sind die Ecken des Gehäuses 13 des Schalldämpfers 11 mindestens teilweise abgerundet, wie bei 39 angedeutet. 4 and FIG. 5 show top views of the top of the compressor 1 with attached muffler 11, wherein the compressor is mounted on the chassis 37 of a transport vehicle. Fig. 5 illustrated in comparison to Fig. 4 How the silencer 11 can be infinitely angularly adjusted relative to the compressor 1 after loosening of the mounting flange 17 against the housing 13 clamping screws and fixed by tightening the clamping screws in a desired angular position relative to the compressor 1. This adaptation to the present on each vehicle installation conditions is possible. The angular adjustment of the muffler takes place about an axis of rotation which is concentric with the central axis of the inlet opening 15 of the muffler or the central axis of the connecting flange 9 of the compressor ( Fig. 1 ). Preferably, the corners of the housing 13 of the muffler 11 are at least partially rounded, as indicated at 39.

In Fig. 4 und 5 sind auch die Köpfe der in Fig. 1 - 3 nicht dargestellten Spannschrauben bei 30 angedeutet.In 4 and 5 are also the heads of in Fig. 1-3 not shown clamping screws indicated at 30.

Vorzugsweise weist das Gehäuse 13 unterhalb des Flanschdeckels 29 eine weitere, zur unteren Gehäuseöffnung 20 koaxiale und durchmessergleiche Öffnung 18 auf (siehe Fig. 2), die von dem Sitz 27 umgeben ist und von dem Flanschdeckel 29 abdichtend verschlossen wird. Dadurch ist es möglich, den Montageflansch 17 mit Flanschkern 23 und den Flanschdeckel 27 gegeneinander zu vertauschen. Diese Konstruktion des Schalldämpfers 11 mit herausnehmbarem und vertauschbarem Montageflansch 17 und Flanschdeckel 29 ermöglicht zusätzlich zu der stufenlosen Winkelverstellung um die Achse A-A in Fig. 2 einen zusätzlichen Freiheitsgrad der Verstellung des Schalldämpfers 11 relativ zum Kompressor 1, nämlich durch Wenden um 180° um eine zur Achse A-A rechtwinklige Achse B-B (vgl. Fig. 2). Hierzu brauchen nur die aus Montageflansch 17 und Flanschkern 23 bestehende Einbaueinheit einerseits und der Flanschdeckel 29 andererseits miteinander vertauscht zu werden, so dass sich der Montageflansch 17 in dem oberen Sitz 27 des Gehäuses 13 und der Flanschdeckel 29 in dem unteren Sitz 21 befindet. Der Schalldämpfer 11 kann dann in einer um 180° gewendeten Position an dem Kompressor 1 montiert werden, so dass nun die Öffnung 18 die Einströmöffnung ist und die Öffnung 20 von dem Flanschdeckel verschlossen wird.Preferably, the housing 13 below the flange 29, a further, coaxial to the lower housing opening 20 and the same diameter opening 18 (see Fig. 2 ), which is surrounded by the seat 27 and is sealingly closed by the flange cover 29. This makes it possible to swap the mounting flange 17 with the flange core 23 and the flange cover 27 against each other. This construction of the muffler 11 with removable and interchangeable mounting flange 17 and flange 29 allows in addition to the continuous angle adjustment about the axis AA in Fig. 2 an additional degree of freedom of adjustment of the muffler 11 relative to the compressor 1, namely by turning by 180 ° about an axis BB perpendicular to the axis AA (see. Fig. 2 ). For this purpose, only the existing assembly flange 17 and flange 23 existing mounting unit on the one hand and the flange 29 on the other hand to be interchanged with each other, so that the mounting flange 17 is in the upper seat 27 of the housing 13 and the flange 29 in the lower seat 21. The muffler 11 can then be mounted in a 180 ° position on the compressor 1, so that now the opening 18 is the inlet opening and the opening 20 is closed by the flange.

Die horizontal geschnittene Darstellung des Schalldämpfers 11 in Fig. 4 erläutert auch eine erfindungsgemäß bevorzugte Gestaltung des Strömungsweges der Druckluft im Schalldämpfer von der Einlassöffnung 15 zu der Auslassöffnung 19. Der in das Gehäuse 13 eingesetzte rohrförmige Flanschkern 23 ist über mehr als die Hälfte, vorzugsweise über ca. dreiviertel seines Umfangs von einer gekrümmten Wand 41 und einem sich daran anschließenden Teil der Gehäusewand so umgeben, dass diese einen im Wesentlichen gleichbleibenden Abstand von der Umfangsfläche des Flanschkerns 23 haben, so dass ein Ring-kanal 43 von im wesentlichen konstanter Breite gebildet wird. Die durch das Fenster 25 in der Wandung des Flanschkerns 23 einströmende Druckluft gelangt in den Ringkanal 43, den sie, je nach der Winkelstellung des Flanschkerns, auf einem größeren oder kleineren Teil seiner Umfangslänge durchströmt, bevor sie etwa bei der Position 45 in Fig. 4 in den eigentlichen schalldämpfenden Strömungsweg gelangt, der in an sich bekannter Weise mit schalldämpfenden Elementen, wie z. B. Strömungshindernissen, Auskleidung mit Dämm-Material, Metallmembranen oder dgl. (nicht dargestellt) versehen ist.The horizontally cut representation of the muffler 11 in Fig. 4 also illustrates an inventive preferred design of the flow path of the compressed air in the muffler from the inlet port 15 to the outlet port 19. The inserted into the housing 13 tubular flange core 23 is over more than half, preferably about three quarters of its circumference of a curved wall 41 and an adjoining part of the housing wall surrounded so that they have a substantially constant distance from the peripheral surface of the Flanschkerns 23, so that a ring channel 43 is formed of substantially constant width. The air flowing through the window 25 in the wall of the Flanschkerns 23 compressed air enters the annular channel 43, which it flows through, depending on the angular position of the Flanschkerns, on a greater or lesser part of its circumferential length, before about at the position 45 in Fig. 4 in the actual sound-absorbing flow path passes, in a conventional manner with sound-absorbing elements such. As flow obstacles, lining with insulating material, metal membranes or the like. (Not shown) is provided.

Durch diese Gestaltung des Schalldämpfers werden zwei Vorteile erreicht. Zum einen ist sichergestellt, dass in jeder Winkelstellung des Montageflansches 17 und Flanschkerns 23 zum Schalldämpfergehäuse 13 (und damit in jeder Winkelstellung des Schalldämpfers 11 gegenüber dem Kompressor 1), innerhalb eines Verstellbereichs von mindestens 180°, das Fenster 25 des Flanschkerns 23 sich im Bereich des Ringkanals 43 befindet. In jeder Winkelstellung des Schalldämpfers 11 ist somit gewährleistet, dass die aus dem Fenster 25 des Flanschkerns 23 auftretende Druckluft zuerst in den Ringkanal 43 gelangt, der sich mit konstanter Breite über den größeren Teil des Umfangs des Flanschkerns 23 erstreckt. Dadurch liegt im gesamten Verstellbereich des Schalldämpfers 11 im Wesentlichen die gleiche Schalldämpfwirkung vor. Der zweite Vorteil der dargestellten Konstruktion des Schalldämpfers besteht darin, dass durch geeignete Bemessung der Breite des Ringkanals 43, und Wahl eines geeigneten Werkstoffs für die ihn begrenzenden Wandungen, der Ringkanal 43 akustisch auf das zu dämpfende Frequenzspektrum abgestimmt werden kann, so dass eine zusätzliche Schallreduktion erzielt wird.This design of the muffler two advantages are achieved. On the one hand it is ensured that in each angular position of the mounting flange 17 and flange core 23 to the muffler housing 13 (and thus in any angular position of the muffler 11 relative to the compressor 1), within an adjustment of at least 180 °, the window 25 of the flange core 23 in the area of the annular channel 43 is located. In each angular position of the muffler 11 is thus ensured that the occurring from the window 25 of the flange 23 compressed air first passes into the annular channel 43, which extends over the greater part of the circumference of the Flanschkerns 23 with a constant width. As a result, substantially the same sound damping effect is present in the entire adjustment range of the muffler 11. The second advantage of the illustrated construction of the muffler is that by suitably dimensioning the width of the annular channel 43, and choosing a suitable material for the walls bounding it, the annular channel 43 can be acoustically tuned to the frequency spectrum to be attenuated, so that an additional sound reduction is achieved.

Nachdem die Druckluft den schalldämpfenden Strömungsweg im Gehäuse 13 des Schalldämpfers durchlaufen hat, gelangt sie zur Auslassöffnung 19, und zwar über einen Gehäuseansatz 47, in welchem eine Umlenkung der Druckluft um 90° nach oben erfolgt. Der Umlenkansatz 47 ist an dem Hauptteil des Gehäuses 13 des Schalldämpfers 11 durch Befestigungsschrauben 49 befestigt und kann nach Lösen der Schrauben 49 abgenommen und in mindestens einer um 180° gedrehten Position, ggf. auch in zwei um 90° gedrehten Positionen, wieder befestigt werden, so dass die Ausströmrichtung der schallgedämpften Druckluft nach unten oder zur Seite gerichtet ist.After the compressed air has passed through the sound-absorbing flow path in the housing 13 of the muffler, it passes to the outlet opening 19, via a housing projection 47, in which a deflection of the compressed air by 90 ° upwards. The deflection lug 47 is attached to the main part of the housing 13 of the muffler 11 by fastening screws 49 and can be removed after loosening the screws 49 and in at least one rotated by 180 ° position, possibly also in two rotated by 90 ° positions, again attached, so that the outflow direction of the silenced compressed air is directed downward or to the side.

In Fig. 4 und 5 ist eine Öffnung 45 in der Gehäusewand erkennbar. Diese dient für das Einsetzen eines Überdruckventils und ist für die Erfindung ohne Bedeutung.In 4 and 5 an opening 45 in the housing wall can be seen. This serves for the insertion of a pressure relief valve and is irrelevant to the invention.

Claims (9)

Schalldämpfer zur Verwendung an einem Kompressor, umfassend ein Gehäuse (13) mit Einström- und Ausströmöffnung (15, 19), die durch einen in dem Gehäuse (13) verlaufenden Strömungskanal mit schalldämpfenden Eigenschaften verbunden sind, und mit einem die Einströmöffnung (15) umgebenden Montageflansch (17), der mit einem am Druckluftauslass des Kompressors vorgesehenen Flansch (9) durch Befestigungsmittel verbindbar ist, um den Schalldämpfer am Kompressor zu befestigen, dadurch gekenn- zeichnet, dass der Montageflansch (17) an dem Gehäuse (13) des Schalldämpfers drehbar gelagert ist und dass Mittel vorgesehen sind, mit denen der Montageflansch am Gehäuse (13) in beliebiger Winkelstellung festlegbar ist.A muffler for use on a compressor, comprising a housing (13) with inflow and outflow openings (15, 19) connected by a flow channel with sound damping properties in the housing (13), and with a flow surrounding the inflow opening (15) Mounting flange (17) which is connectable with a provided at the compressed air outlet of the compressor flange (9) by fastening means to secure the muffler to the compressor, characterized in that the mounting flange (17) on the housing (13) of the muffler rotatable is mounted and that means are provided with which the mounting flange on the housing (13) can be fixed in any angular position. Schalldämpfer nach Anspruch 1, dadurch gekennzeichnet, dass am Gehäuse (13) ein kreisrunder Sitz (21) für den Montageflansch (17) vorgesehen ist.Silencer according to Claim 1, characterized in that a circular seat (21) for the mounting flange (17) is provided on the housing (13). Schalldämpfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass auf der dem Montageflansch (17) gegenüberliegenden Seite des Gehäuses (13) eine Widerlagerplatte (29) vorgesehen ist und dass die Widerlagerplatte (29) mit dem Montageflansch (17) verbindende Zugmittel vorgesehen sind, mit denen der Montageflansch (17) und die Widerlagerplatte (29) gegen das Gehäuse (13) verspannt werden können, um sie unverdrehbar festzulegen.A silencer according to claim 1 or 2, characterized in that on the mounting flange (17) opposite side of the housing (13) an abutment plate (29) is provided and that the abutment plate (29) with the mounting flange (17) connecting traction means are provided with which the mounting flange (17) and the abutment plate (29) against the housing (13) can be clamped to set them non-rotatable. Schalldämpfer nach Anspruch 2, dadurch gekennzeichnet, dass die Zugmittel aus einer Anzahl von Spannschrauben bestehen, die sich durch die Widerlagerplatte (29), das Gehäuse (13) und den Montageflansch (17) erstreckend.Silencer according to claim 2, characterized in that the traction means consist of a number of clamping screws extending through the abutment plate (29), the housing (13) and the mounting flange (17) extending. Schalldämpfer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass anschließend an den Montageflansch (17) ein rohrförmiger Flanschkem (23) vorgesehen ist, der sich von der Einströmöffnung (15) aus in das Gehäuse (13) hinein erstreckt und in seiner Umfangswandung mindestens ein Fenster (25) aufweist, durch das an der Einströmöffnung (15) in den Flanschkern (23) einströmende Druckluft in den schalldämpfenden Strömungsweg des Gehäuses (13) strömen kann.Silencer according to one of claims 1 to 4, characterized in that subsequent to the mounting flange (17) a tubular Flanschkem (23) is provided, which extends from the inflow opening (15) into the housing (13) and in its peripheral wall at least one window (25) through which the inflow opening (15) in the flange core (23) flowing compressed air in the sound-absorbing flow path of the housing (13) can flow. Schalldämpfer nach Anspruch 5, dadurch gekennzeichnet, dass in dem Gehäuse (13) eine zylindrisch gekrümmte Wand (41) ausgebildet ist, die den rohrförmigen Flanschkem (23) über mehr als die Hälfte seines Umfangs mit Abstand umgibt und zusammen mit diesem einen Ringkanal (45) bildet, der die durch das Fenster (25) des rohrförmigen Flanschkerns (23) zuströmende Druckluft aufnimmt und in den schalldämpfenden Strömungskanal des Gehäuses leitet.A silencer according to claim 5, characterized in that in the housing (13) a cylindrically curved wall (41) is formed, which surrounds the tubular Flanschkem (23) over more than half of its circumference at a distance and together with this an annular channel (45 ), which receives the compressed air flowing in through the window (25) of the tubular flange core (23) and conducts it into the sound-absorbing flow channel of the housing. Schalldämpfer nach Anspruch 6, dadurch gekennzeichnet, dass der Ring-kanal (45) den rohrförmigen Flanschkern (23) über einen Winkel umgibt, der ausreichend groß ist, damit in jeder Winkelstellung des Montageflansches (17) innerhalb eines Winkelbereichs von 180° gewährleistet ist, dass das Fenster (25) des Flanschkerns in den Ringkanal (45) mündet.Silencer according to claim 6, characterized in that the annular channel (45) surrounds the tubular flange core (23) at an angle which is sufficiently large so that it is ensured in every angular position of the mounting flange (17) within an angular range of 180 °, that the window (25) of the Flanschkerns opens into the annular channel (45). Schalldämpfer nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass an zwei einander gegenüberliegenden Seiten des Gehäuses zwei wahlweise als Einströmöffnung verwendbare Gehäuseöffnungen (18, 20) vorgesehen sind, wobei der Montageflansch (17) wahlweise an der einen oder anderen Öffnung (18, 20) winkelverstellbar und festlegbar angeordnet werden kann.Silencer according to one of claims 1 to 7, characterized in that on two opposite sides of the housing two optionally usable as an inlet opening openings (18, 20) are provided, wherein the mounting flange (17) either at one or the other opening (18, 20) can be arranged angle adjustable and fixable. Schalldämpfer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Ausströmöffnung (19) an einem den Strömungsweg um 90° umlenkenden gesonderten Gehäuseteil (47) vorgesehen ist, der am Gehäuse (13) mit Befestigungsmitteln (49) so befestigt ist, dass er am Gehäuse in mindestens zwei um 180° gegeneinander gedrehten Positionen befestigbar ist.Silencer according to one of Claims 1 to 8, characterized in that the outflow opening (19) is provided on a separate housing part (47) which deflects the flow path by 90 ° and which is fastened to the housing (13) with fastening means (49) it can be fastened to the housing in at least two positions rotated by 180 ° relative to one another.
EP08006884.4A 2007-04-05 2008-04-04 Silencer for use in a compressor Not-in-force EP1978259B1 (en)

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DE202007005097U DE202007005097U1 (en) 2007-04-05 2007-04-05 Silencer for use on a compressor

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EP1978259A3 EP1978259A3 (en) 2014-07-30
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DE202010006419U1 (en) 2010-05-04 2010-09-02 Emico Gmbh Broadband damping device for sound damping in industrial facilities, large plants or machines
EP3334937A1 (en) 2015-08-11 2018-06-20 Carrier Corporation Screw compressor economizer plenum for pulsation reduction
CN108138775B (en) * 2015-10-02 2020-11-20 开利公司 Screw compressor resonator array
WO2020072145A1 (en) * 2018-10-02 2020-04-09 Carrier Corporation Multi-stage resonator for compressor
CN113883062A (en) * 2021-09-18 2022-01-04 中国船舶重工集团公司第七一一研究所 Silencing absorber for screw compressor
DE102021134652B3 (en) 2021-12-23 2023-05-11 Man Energy Solutions Se screw compressor

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EP1715238A2 (en) * 2005-04-21 2006-10-25 Ingersoll-Rand Company Double throat pulsation dampener for a compressor

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DE29904410U1 (en) * 1999-03-10 2000-07-20 Ghh Rand Schraubenkompressoren Screw compressor
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EP1715238A2 (en) * 2005-04-21 2006-10-25 Ingersoll-Rand Company Double throat pulsation dampener for a compressor

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EP1978259A3 (en) 2014-07-30
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