EP0862012A2 - Dispositif d'amortissement acoustique pour amortir le bruit d'un fluide et d'un corps - Google Patents

Dispositif d'amortissement acoustique pour amortir le bruit d'un fluide et d'un corps Download PDF

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Publication number
EP0862012A2
EP0862012A2 EP98102607A EP98102607A EP0862012A2 EP 0862012 A2 EP0862012 A2 EP 0862012A2 EP 98102607 A EP98102607 A EP 98102607A EP 98102607 A EP98102607 A EP 98102607A EP 0862012 A2 EP0862012 A2 EP 0862012A2
Authority
EP
European Patent Office
Prior art keywords
damping device
corrugated
flow
hose
connecting sleeve
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
EP98102607A
Other languages
German (de)
English (en)
Other versions
EP0862012B1 (fr
EP0862012A3 (fr
Inventor
Klaus-Henning Terschnien
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.)
Solvis GmbH and Co KG
Original Assignee
SOLVIS Solarsysteme GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19706155A external-priority patent/DE19706155A1/de
Application filed by SOLVIS Solarsysteme GmbH filed Critical SOLVIS Solarsysteme GmbH
Publication of EP0862012A2 publication Critical patent/EP0862012A2/fr
Publication of EP0862012A3 publication Critical patent/EP0862012A3/fr
Application granted granted Critical
Publication of EP0862012B1 publication Critical patent/EP0862012B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/22—Silencing apparatus characterised by method of silencing by using movable parts the parts being resilient walls

Definitions

  • the invention relates to a noise damping device for flow and Structure-borne noise from flowing media, especially liquids, with a Corrugated pipe and a connecting sleeve and a device for producing a such noise reduction device.
  • the tubular silencer for gaseous ones flowing media known. These are particularly under pressure, can also be under negative pressure.
  • the tubular silencer has a multilayer structure, which on the inside by a Wire helix and outside of a helical protective sheath is surrounded.
  • the tubular silencer has at least one end a toroid-like end cap open on one side in the axial direction, the inner socket a thread formation screwed to the wire helix has and the outer socket gas-tight on the helical wave Protective jacket is attached, with the end cap at its closed End area has a mounting connection.
  • the outer neck of the The end cap is glued to the protective jacket.
  • the one from the gaseous flowing medium flowed through the area of the multilayer structure consists in particular of a net hose made of PVC-coated Glass fiber fabric, which is protected from the inside by the wire helix.
  • the mesh hose is surrounded by a soundproofing material, which consists in particular of polyurethane foam or glass wool.
  • a soundproofing material which consists in particular of polyurethane foam or glass wool.
  • the helical wave Protective jacket provided, which consists of metal.
  • DE 90 15 414 U1 is a sound-absorbing air or gas guide element known.
  • This has a longitudinally slotted inner corrugated tube as well an outer corrugated pipe fitted over it, being between the two corrugated pipes Spaces are formed, which are like chambers of chamber silencers Act.
  • the two separately manufactured tubes are one inside the other pushed, the outer diameter of the inner tube and the inner diameter of the outer tube are chosen so that a firm hold of the two Pipes to each other without additional fixation or connecting elements is guaranteed.
  • the walls of the inner and outer tube can be made of several layers of material, of which at least one Layer of a sound absorbing, i.e. H. soundproof material is formed.
  • This sound absorbing layer can either be on the inside of the outer tube and / or arranged on the inside or outside of the inner tube be.
  • Other layers can consist of metal tape or foil.
  • the invention has for its object a noise reduction device to dampen those occurring during the pulsation of a flowing medium Creating noise and structure-borne noise and a continuous flow to create. It is also an object of the invention to provide a device for manufacturing to create the noise damping device.
  • the task is for a noise damping device for flow and Structure-borne noise from flowing media, especially liquids, with a Corrugated pipe and a connecting sleeve solved in that a corrugated pipe or a Corrugated hose is deeply drawn and a flow part from one encased soft, elastic material, with a hydraulic separation between the medium flowing through the flow part and between Corrugated tube and flow section provided sound reduction rooms.
  • a device for producing such a noise damping device the object is achieved in that press jaw elements are provided, which have a contour corresponding to the outer contour of the corrugated hose, by activating the press jaw elements, the contour of the corrugated hose is compressible over the diameter so that a substantially constant contour and a reduced diameter. Training the invention are defined in the subclaims.
  • the noise damping device also proves to be so as advantageous because it consists of relatively little material and still one can produce a high degree of damping. Furthermore, she grants herself High wear of the internal elastic flow part Safety. If the flow part becomes brittle and breaks, this occurs flowing fluid into the encased corrugated tube. This goes the sound damping effect of the elastic flow part is lost, but not the functionality of the entire facility. The damage will audible due to the lack of damping of the pulsation by the elastic Flow part. Such a leak is therefore long before one complete destruction of the noise attenuation device can be noticed. This makes the noise damping device a particularly large one Security guaranteed.
  • the connecting sleeve preferably provided at the ends of the flow-through part is used to connect the noise damping device for example a gear pump.
  • the pumped from the gear pump flowing medium flows through the elastic flow part. Because of Due to its elasticity, the flow part reduces the pulsation of the liquid or the flowing medium and dampens it.
  • the elastic flow part expand relatively far. These grooves also catch the pulses transmitted to the flow-through part during the liquid movement from. That around the elastic hose, for example, as a flow-through part arranged, deeply drawn corrugated tube also serves to support the elastic Hose.
  • the corrugated tube is essentially rigid, but flexible. It can thereby be bent into such a position that the corresponding Application location is required.
  • the wavy outer skin of the Corrugated pipe shows strong differences between wave crests and wave troughs on what is referred to as deeply indented. Due to the deeply drawn, wavy The outer skin becomes sufficient for the internal elastic hose Space for expansion with the pulses of the flowing medium commanded.
  • the pulsation acting in the direction of flow is due to the elastic wall of the flow part into a cross flow or radially outwards directional flow. This is made possible by the fact that flowing liquid column in a connected to the damping device Pipeline acts as a hydraulic barrier mass.
  • the ratio of length is the Damping device crucial to the elasticity of the flow part.
  • the structure-borne sound absorption is achieved by extending the sound transmission path through the annulus of the corrugated pipe in combination with the friction damping by the elastic flow part, which by the static pressure is pressed against the corrugated pipe.
  • a hose press provided with press jaw elements is, which has jaw elements with a contour, which in essentially corresponds to the outer contour of the corrugated tube or hose.
  • a hose press provided with press jaw elements is, which has jaw elements with a contour, which in essentially corresponds to the outer contour of the corrugated tube or hose.
  • the diameters of the connecting sleeve and the pressed one are particularly preferred Corrugated hose chosen so that in the compressed state between the Connection sleeve and the corrugated hose the compressed flow part lies. This creates a tight connection.
  • the outer diameter of the elevations of the connecting sleeve is preferred chosen that it is larger than the inner diameter of the depressions of the Corrugated hose. For example, at very high pressure within the The flow part of the corrugated hose shows the endeavor from the connecting sleeve to be pressed.
  • the outside or inside diameter of the connecting sleeve and corrugated hose can be Inner diameter of the corrugated hose the outer diameter of the connecting sleeve Only overcome if the corrugated hose is expanded becomes. However, this process requires a particularly high level of force, which means that even at high pressures a stable connection between the Connection sleeve, the flow part, and the corrugated hose is given.
  • the silicone hose covers the entire area of the connecting sleeve. This is a direct one Contact between the connecting sleeve and corrugated hose and thus the structure-borne noise transmission prevented.
  • Corrugated hose using the hose press can increase the strength of the corrugated hose connection sleeve connection can be varied and adjusted as required.
  • the ends of the corrugated hose are particularly preferably crimped inwards.
  • the flow-through part does not end at any sharp edges of the corrugated hose injured.
  • By crimping inwards an im essential burr-free, soft insertion edge. The crimping however poses just an advantage, no imperative for connecting Corrugated hose and flow part.
  • the noise reduction device according to the invention for liquid and gaseous media. It shows its effect particularly advantageous for liquid media.
  • the state of the art of the two Equipment according to the above documents is only for gaseous (compressible) Media designed; with liquid media (incompressible) the Sound cannot be broken down and the sound absorbing effect of Facilities just cannot be obtained because the pulsation is none Can experience damping, and continue to use this as a pipeline Make disturbing noise noticeable, i.e. transmitted.
  • Fig. 1 shows a sectional view through the detail of a noise damping device 1 for flow and structure-borne noise.
  • a flowing medium is indicated by a black arrow.
  • the noise damping device 1 has a connecting sleeve 2 as a so-called fitting.
  • the connecting sleeve 2 is provided with an internal thread 3. In this area, it can be connected to a corresponding connector on, for example, a gear pump.
  • the connecting sleeve passes below the internal thread 3 from the further head part 4 into a connecting piece 5 of smaller diameter.
  • the connector 5 is provided at least at two points with recesses 7 lying on the outside 6.
  • an elastic flow part encasing the connecting piece 5 10 a This can be a hose, for example.
  • the hose 10 is pulled firmly and dimensionally stable over the connecting sleeve 2.
  • the hose end 11 is located at the transition area from the head part 4 to the connector 5 Connection sleeve 2 on.
  • the hose is preferably made of an elastomer, especially made of silicone. It has such softness and elasticity that it closes close to the connection sleeve. An exit of the flowing medium from this hose in the area of the connecting sleeve therefore not possible. To avoid wear on the hose, this is advantageous from a temperature-resistant and resistant to aging Made of material.
  • the hose 10 is surrounded on its outer surface 12 by a corrugated tube 13.
  • the corrugated tube 13 has deeply drawn-in wave crests 14 and troughs 15 on.
  • the corrugated tube is made of a solid, dimensionally stable material, in particular Stainless steel. It supports the hose 10 from the outside and protects it at the same time from external damage.
  • the corrugated tube 13 has one such an inner diameter that it the hose 10 firmly on the connector 5 of the connecting sleeve 2 presses. This resists the elastic hose a sliding off the connection sleeve and possibly releasing a contact surface protected between corrugated pipe and connecting sleeve.
  • the hose is mechanically supported and can therefore higher internal pressures of the endure pulsating flowing medium. Between the outside of the hose 10 and inside of the corrugated tube 13 are thus sound reduction rooms 17 educated.
  • FIG. 2 shows a detailed section of the noise damping device according to FIG. 1.
  • the pulsating flowing medium represented by arrows running in the longitudinal and transverse directions, presses the inner soft hose 10 in the transverse direction in the direction against the inner cavities of the corrugated tube 13, that is to say the sound-absorbing spaces 17.
  • the hose touches the corrugated pipe, however Not. This reduces transmission of the pulsation of the flowing medium in the longitudinal direction.
  • the pulsation is thus dampened.
  • the deep-drawn corrugated tube 13 alone could not ensure such damping.
  • the pulsation of the flowing medium would only set the corrugated tube in longitudinal vibrations.
  • the liquid column also vibrates in this longitudinal oscillation.
  • a transverse movement of the damping material is required to reduce the pulsation of the flowing medium.
  • This transverse movement can be carried out by the soft, elastic hose 10.
  • the pressure pulsation is thus reduced in that the hose is flexible in the radial direction due to its high elasticity.
  • the elastic flow-through part must not lie completely against the corrugated pipe, since otherwise damping is no longer possible.
  • the radial movement of the elastic flow part is only about 0.1 mm.
  • FIG. 3 shows a sectional view through a gear pump 20 with a connected noise damping device 1.
  • the gear pump has two meshing externally toothed wheels 71, 72.
  • a liquid supply 20 and a liquid discharge 21 are provided. These are shown by arrows.
  • the direction of rotation of the two gear wheels 71, 72 is also indicated by arrows.
  • the displacement takes place in Fig. 3 from left to right. Due to the tooth mesh, a pulsation with tooth frequency is superimposed on the flow of the flowing medium. The frequency of the non-uniformity depends primarily on the number of teeth.
  • the current pulsation causes pressure fluctuations in the pressure chamber and causes the pump to run.
  • the cause of the pressure pulsation are tooth gaps filled with incompressible fluid.
  • Liquid is displaced in the area in which the gear wheels 71, 72 mesh with one another.
  • the amount of fluid displaced therefore depends on the volume between the teeth of the gears.
  • the amplitude of the pulsation also depends on this volume.
  • Another parameter for the amplitude of the pulsation is the time during which the displacement takes place. To lengthen the time, helical gearing is advantageously provided or the speed is reduced.
  • a larger gear wheel diameter is provided while simultaneously reducing the tooth height. Although this increases the number of teeth and thereby the frequency of the pulsation, the amplitude of the pulsation is considerably reduced as a major disturbance variable.
  • the pulsation as rhythmic displacement of the liquid from the tooth gaps in the direction of the liquid discharge 21 is retained.
  • Fig. 3 is therefore between the pipe 22 and the gear pump 70 Noise reduction device 1 inserted.
  • the transition from the noise damping device to the gear pump is shown, but not the Transition area to the pipeline 22.
  • the pipeline 22 is advantageously corresponding via a connecting sleeve with the noise damping device connected.
  • the noise damping device is via a connecting sleeve connected to the liquid discharge 21 of the gear pump 70. Even better Noise reduction is provided by the provision of a further noise reduction device achieved on the feed side.
  • Noise reduction device can be used in a particular Use case with, for example, a length of the noise damping device of 350 mm attenuation values of 26 dB, which means an attenuation factor of 20 corresponds to be generated. Will a for the noise damping device If the length is longer, even better damping values can be achieved. The noise pollution from such a gear pump is considerable reduced.
  • the pump itself can help avoid structure-borne noise about their attachment, for example, on soft rubber buffers stored to isolate their own structure-borne noise.
  • FIG. 4 shows a sectional view of a noise damping device 1 according to the invention with two ends E1, E2.
  • the noise damping device has the continuous corrugated hose 13, the continuous flow part 10 and two connecting sleeves 30.
  • union nuts are attached as fastening parts 41. Sealing takes place within the union nuts 41 by means of sealing elements 40, namely O-rings.
  • the corrugated hose 13 has the corrugated one, provided with elevations and depressions Outer contour that essentially corresponds to the inner contour.
  • the corrugated hose 13 In the area of the end E1 of the noise damping device 1 has the corrugated hose 13 a straight edge 18.
  • the edge 19 In the area of the end E2 of the noise damping device 1, alternatively, the edge 19 is crimped inwards, to make a burr-free, soft end.
  • the flow-through part 10 is arranged inside the corrugated hose 13. in the The area between the two connecting sleeves 30 has the flow-through part, in particular a silicone tube, a cylindrical profile. In the field of Both connection sleeves 30, however, the flow part 10 has a wavy Profile on. The flow part follows in this area with regard to its Profile or its contour the undulating elevations and depressions of corrugated hose and connecting sleeves.
  • the two ends 101 and 102 of the The flow-through part is attached obliquely to the two union nuts 41. At the same time, they form a spacer of the outer edges 18, 19 of the Corrugated hose 13 to the respective union nut 41 Operation a noise due to striking Edges of the corrugated hose and the union nut and structure-borne noise transmission be prevented.
  • the two connecting sleeves 30 each have a wave-shaped outer contour 32 and an essentially cylindrical inner contour 31.
  • the respective Elevations 33 of the outer contour 32 are essentially correct with regard to their Position with the respective wave mound 14 of the corrugated hose 13.
  • the two connecting sleeves 30 are inclined from and additionally form an annular projection 35 for gripping over through the union nut and fastening in this.
  • a corresponding on End 36 of the connecting sleeves 30 provided paragraph 37 supports the sealing element 40 or the O-ring, attached to the annular projection 35.
  • the two union nuts have to fasten the noise damping device 1 on a further element, for example a pipe, in particular a heating pipe, an internal thread as a screw thread 42.
  • the O-ring then seals the pipe device connection against leakage.
  • FIG. 5 shows a combined side and sectional view of the connecting sleeve 30.
  • the shoulder 37 is provided with a radius so that the respective O-ring 40 can be positively received.
  • the end 38 directed away from this paragraph 37 of the connecting sleeve 30 is with rounded edges 39 provided. This means that even with pulsating, the flow-through part and the connecting sleeves do not flow any medium Danger of injuries to the flow-through part made of elastic material given by possibly sharp edges.
  • connection sleeve 30 is provided larger than the inner diameter of the pressed Corrugated hose 13 in the area of its troughs 15. This results in it is advantageous that at the moment when within the flow part For example, there is a very high pressure, which is normally this would press from the connecting sleeve 30, the inner diameter of the Corrugated hose the outer diameter of the connecting sleeve only then can overcome if the corrugated hose would be expanded. However, this would require a particularly high level of force, which in general of the pressure prevailing within the flow part is not available is provided. This creates a stable connection even at high pressures between the connecting sleeve, the flow part pushed over it, for example in the form of a silicone tube, as well as the corrugated tube created.
  • grooves 34 of the connecting sleeves 30 are shown.
  • the number of grooves 34 can be varied. Particularly preferred it depends on the strength of the connection to be provided dimensioned between corrugated hose and connecting sleeve.
  • connection sleeve cannot be made from a medium flowing through vulnerable, with this unreactive material, especially brass be made by turning.
  • FIG. 6 shows a press jaw element 50 of a device for producing a noise damping device by pressing the corrugated hose shafts over the connecting sleeve with the flow part, in particular a hose press, being interposed therebetween.
  • the press jaw element shown in Fig. 6 has a Corresponding outer contour to be generated wave profile of the corrugated hose 52 on.
  • the crowned elevation 53 or depth of the depressions 54 the outer contour 52 of the press jaw elements 50 also corresponds to the desired dimensions of the contour of the corrugated hose.
  • the device For installation in a hose press, for example, as a device for manufacturing the device has a noise damping device by pressing 6 a fitting bore as a blind bore 55 on. In addition, a thread 56 is provided in this area.
  • the press jaw elements are preferably made of hardened steel.
  • FIG. 7 shows the top view of the cross-sectional shape of the pressing jaw element 50 according to FIG. 6.
  • the pressing jaw element 50 has radii in the area of its wavy outer contour 52 as well as in the area of its inner contour 51 and forms a circular ring segment as a whole.
  • the press jaw element encloses an angle ⁇ of 45 °.
  • the dimensions thereof are varied with respect to the encompassing angle ⁇ .
  • such a number of press jaw elements is used that the corrugated hose can be pressed completely along its entire circumference, that is to 360 °, at the same pressure to be provided. This is advantageously done by a symmetrical number of press jaw elements, distributed over the circumference of the corrugated hose.
  • FIG. 8 shows a further embodiment of such a pressing jaw element 50.
  • the press jaw element 50 is provided with a lever element 60.
  • the lever element 60 serves to actuate the press jaw element and to fasten it within the device for producing the noise damping device by pressing.
  • the lever element 60 is connected to the press jaw element 50 via a dowel pin 58 connected.
  • the lever element 60 is also in a recess 57 in Area of the inner contour 51 of the press jaw element 50 is arranged.
  • By doing illustrated embodiment has the fitting bore 55, in contrast 6, no additional thread on.
  • a dowel pin 61 for connecting or fastening the lever element 60 and press jaw element 50 created unit within the device for pressing the noise damping device is a dowel pin 61 in a fitting bore (Blind bore) 62 provided in the rear region of the lever element 60.
  • the rear edge 63 of the lever element 60 is rounded.
  • FIG. 9 This shape and the profile or the cross-sectional view of the pressing jaw element 50 can be better seen in FIG. 9 .
  • This figure shows a plan view of the pressing jaw element 50 and the lever element 60 connected to it.
  • the pressing jaw element 50 encloses an angle of 60 °.
  • the total length of the pressing jaw element 50 and the lever element 60 up to its rear edge 63 can be, for example, 56 mm, the lever element can have a length of 47.16 mm and store 2.41 mm of the lever element in the recess 57 of the pressing jaw element 50.
  • a distance of 5 mm should be provided, also between two depressions 54.
  • the recesses can be made with a radius of 1.5 mm, for example be the ridges with a radius of 1 mm.
  • the connecting sleeve 30 5 is therefore the distance between two ridges 33 and between two depressions 34 also chosen to be 5 mm.
  • the radius is at the depression is 1.66 mm, whereas if it is raised at 1 mm lies. This allows optimal compression of a corrugated hose over the outer contour of the connecting sleeve by the respective press jaw element 50 are provided.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pipe Accessories (AREA)
  • Exhaust Silencers (AREA)
EP98102607A 1997-02-17 1998-02-16 Dispositif d'amortissement acoustique pour amortir le bruit d'un fluide et d'un corps Expired - Lifetime EP0862012B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19706155 1997-02-17
DE19706155A DE19706155A1 (de) 1997-02-17 1997-02-17 Geräuschdämpfungseinrichtung für Strömungs- und Körperschall
DE29718655U 1997-10-22
DE29718655U DE29718655U1 (de) 1997-02-17 1997-10-22 Geräuschdämpfungseinrichtung für Strömungs- und Körperschall sowie Einrichtung zur Herstellung der Geräuschdämpfungseinrichtung

Publications (3)

Publication Number Publication Date
EP0862012A2 true EP0862012A2 (fr) 1998-09-02
EP0862012A3 EP0862012A3 (fr) 1999-02-03
EP0862012B1 EP0862012B1 (fr) 2002-09-18

Family

ID=26034034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98102607A Expired - Lifetime EP0862012B1 (fr) 1997-02-17 1998-02-16 Dispositif d'amortissement acoustique pour amortir le bruit d'un fluide et d'un corps

Country Status (3)

Country Link
EP (1) EP0862012B1 (fr)
AT (1) ATE224517T1 (fr)
DK (1) DK0862012T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2161487A3 (fr) * 2008-09-06 2012-06-27 Howaldtswerke-Deutsche Werft GmbH Dispositif d'amortissement des ondes de flexion dans un assemblage de composants
CN113714599A (zh) * 2021-08-23 2021-11-30 深圳市佳士科技股份有限公司 循环冷却水箱

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008064537A1 (de) 2008-12-19 2010-06-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Fluidleitung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8432280U1 (de) 1984-11-03 1985-03-28 Schlauch-Handels-Produktions GmbH, 2401 Ratekau Rohrfoermiger schalldaempfer
DE9015414U1 (de) 1990-11-09 1991-01-24 Alcan Deutschland GmbH, 3400 Göttingen Schalldämmendes Luft- oder Gasführungselement

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Publication number Priority date Publication date Assignee Title
US3061039A (en) * 1957-11-14 1962-10-30 Joseph J Mascuch Fluid line sound-absorbing structures
DE1962134A1 (de) * 1969-12-11 1971-06-16 Rheinisches Metallwerk Gmbh Vorrichtung zum Verhindern oder Reduzieren von Druckschlaegen in Leitungsnetzen
DE2117105A1 (de) * 1971-04-07 1972-10-19 Aeroquip Gmbh Dehnschlauch. Antn: Aeroquip GmbH, 3510 Hann. Münden
DE2518619A1 (de) * 1975-04-26 1976-11-04 Josam Mfg Co Daempfer fuer druckstoesse bzw. schlaege in fluessigkeitsleitungen
DE3707617A1 (de) * 1987-03-10 1988-09-22 Audi Ag Ansaugrohr fuer eine brennkraftmaschine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8432280U1 (de) 1984-11-03 1985-03-28 Schlauch-Handels-Produktions GmbH, 2401 Ratekau Rohrfoermiger schalldaempfer
DE9015414U1 (de) 1990-11-09 1991-01-24 Alcan Deutschland GmbH, 3400 Göttingen Schalldämmendes Luft- oder Gasführungselement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2161487A3 (fr) * 2008-09-06 2012-06-27 Howaldtswerke-Deutsche Werft GmbH Dispositif d'amortissement des ondes de flexion dans un assemblage de composants
DE102008046185B4 (de) * 2008-09-06 2014-10-30 Thyssenkrupp Marine Systems Gmbh Vorrichtung zur Dämmung von Biegewellen in einem Bauteilverbund sowie ein Unterseeboot mit einer solchen Vorrichtung
CN113714599A (zh) * 2021-08-23 2021-11-30 深圳市佳士科技股份有限公司 循环冷却水箱

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Publication number Publication date
DK0862012T3 (da) 2003-01-27
EP0862012B1 (fr) 2002-09-18
ATE224517T1 (de) 2002-10-15
EP0862012A3 (fr) 1999-02-03

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