ЗВУКОПОГЛОЩАЮЩЕЕ УСТРОЙСТВО ДЛЯ ВОЗДУХОВОДА САМОЛЕТА

FIELD: machine building. SUBSTANCE: proposed device comprises, at least, one bent pipe length with inner wall lined by sound absorbing material. Note here that said bent pipe length houses at, least, one air guide device for flow optimisation made up of acoustic separator with its sheet metal jacket covering central absorbing core and provided with micro perforations on inner or outer lateral surface. Note also that nonperforated inner or outer lateral surface of said jacket includes usual perforations with their specific area making, at least, 20%. EFFECT: higher noise absorption factor. 5 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 453 775 (13) C2 (51) МПК F24F B64D F16L G10K 13/24 13/06 55/033 11/16 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009120098/06, 25.10.2007 (24) Дата начала отсчета срока действия патента: 25.10.2007 (72) Автор(ы): ПОЧКА Николай (DE), ВИЛЬЯМСОН Майкл (GB) (73) Патентообладатель(и): ЭЙРБАС ОПЕРЕЙШНЗ ГМБХ (DE) R U Приоритет(ы): (30) Конвенционный приоритет: 27.10.2006 DE 102006050869.6 27.10.2006 US 60/863,195 (43) Дата публикации заявки: 10.12.2010 Бюл. № 34 2 4 5 3 7 7 5 (45) Опубликовано: 20.06.2012 Бюл. № 17 (56) Список документов, цитированных в отчете о поиске: US 20020084138 A1, 04.07.2002. WO 0223099 A1, 21.03.2002. GB 2250356 A, 03.06.1992. RU 2247878 C2, 10.03.2005. RU 2186712 C2, 10.08.2002. 2 4 5 3 7 7 5 R U (86) Заявка PCT: EP 2007/061473 (25.10.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 27.05.2009 (87) Публикация заявки РСТ: WO 2008/049885 (02.05.2008) Адрес для переписки: 119034, Москва, Пречистенский пер., 14, стр.1, 4-й эт., Московское представительство фирмы "Гоулингз Интернэшнл Инк.", Ю.В.Дементьевой (54) ЗВУКОПОГЛОЩАЮЩЕЕ УСТРОЙСТВО ДЛЯ ВОЗДУХОВОДА САМОЛЕТА (57) Реферат: Устройство предназначено для снижения уровня шума в воздуховодах. Устройство содержит, по меньшей мере, один ...

УПРОЩЕННЫЙ МОДАЛЬНЫЙ АТТЕНЮАТОР

1. Модальный аттенюатор снижения шума в технологической системе при протекании жидкости через трубу, содержащий:корпус аттенюатора, содержащий входной и выходной сегменты, связанные соединительным сегментом;перфорированный экран, расположенный внутри корпуса аттенюатора и отстоящий от корпуса аттенюатора для образования кольцевого пространства; имножество колец, расположенных между перфорированным экраном и корпусом аттенюатора;в котором звуковые волны проходят через перфорированный экран и отражаются обратно множеством колец для разрушения других звуковых волн и снижения шума в модальном аттенюаторе.2. Модальный аттенюатор по п. 1, дополнительно содержащий множество перегородок, расположенных на внутренней поверхности корпуса аттенюатора, причем перегородки установлены перпендикулярно к направлению потока жидкости через корпус аттенюатора, и формируют множество полостей между рабочей частью экрана и корпусом аттенюатора.3. Модальный аттенюатор по любому из пп. 1 или 2, отличающийся тем, что по меньшей мере две полости из множества полостей отличаются по объему.4. Модальный аттенюатор по любому из пп. 1 или 2, отличающийся тем, что полости увеличиваются в объеме от входа по направлению к соединительному сегменту.5. Модальный аттенюатор по любому из пп. 1 или 2, отличающийся тем, что полости уменьшаются в объеме от соединительного сегмента по направлению к выходу.6. Модальный аттенюатор по любому из пп. 1 или 2, отличающийся тем, что множество полостей приближаются к кривой при рассмотрении поперечного сечения.7. Модальный аттенюатор по любому из пп. 1 или 2 отличающийся тем, что корпус аттенюатора имеет конический входной сегмент.8. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК F16L 55/033 (13) 2015 113 349 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2015113349, 27.09.2013 (71) Заявитель(и): ФИШЕР КОНТРОЛЗ ИНТЕРНЕШНЕЛ ЛЛС (US) Приоритет(ы): (30) Конвенционный приоритет: 28.09.2012 US 61/707,591 (85) Дата ...

ГЛУШИТЕЛЬ ШУМА

... 1. Глушитель шума, предназначенный для снижения шумов при выходе сжатого воздуха из аппаратов пневматической системы, в частности, аппаратов пневматической системы автомобилей, с впускным отверстием и, по меньшей мере, с одним выпускным отверстием, а также с расположенным между этими отверстиями чашеобразным корпусом, имеющим боковую поверхность чаши и днище чаши, причем во внутреннем пространстве чашеобразного корпуса установлен предназначенный для изоляции шумов звукопоглощающий материал в виде патрона фильтрующего трикотажного полотна, отличающийся тем, что между патроном (7) и боковой поверхностью (2) чаши расположен слой из волокнистого материала (8). ! 2. Глушитель шума по п.1, отличающийся тем, что волокнистый материал (8) в виде войлочного мата навит вокруг наружного периметра фильтрующего трикотажного полотна. ! 3. Глушитель шума по п.1 или 2, отличающийся тем, что волокна волокнистого материала (8) являются полиамидными волокнами. ! 4. Глушитель шума по п.1 или 2, отличающийся ...

Akustischer Schalldämpfer für Verbrennungsmotoren

Akustischer Schalldämpfer für Verbrennungsmotoren mit einem mehrlagigen Aufbau und im Wesentlichen rohrförmiger Gestalt, dadurch gekennzeichnet, dass der Innenraum (5) des Rohres von einem Innenmantel (1) aus Weichschaum eines Volumengewichts zwischen 20 und 50 kg/m3 umgeben ist, und dass um diesen Innenmantel (1) eine Außenschicht (2) aus Schwerschaum eines Volumengewichts zwischen 300 und 600 kg/m3 herumgelegt ist.

LUFTZUFUHRLEITUNG, INSBESONDERE FÜR KRAFTFAHRZEUGE, UND MONTAGEVERFAHREN DAFÜR

Patent DE3401209C2

Hose, for use with IC engines, which produces less noise has outer sleeve enclosing foam tube, to inside of which tubular filter, e.g. of non-woven textile, is glued

The hose, for use with IC engines, produces less noise. It has an outer sleeve (2) which encloses a foam tube (3). A tubular filter (6), e.g. of non-woven textile, is glued to the inside of the foam. An independent claim is included for IC engines fitted with the hose.

SOUND DEADENING MATERIALS

... 1,263,598. Sound insulation. LO SOUND DEVELOPMENTS Ltd. 19 Jan., 1971 [10 Dec., 1969], No. 60231/69. Heading F2X. In a sound absorbing sheet, a bituminousbased sound absorbing layer has, on one side, a heat sensitive adhesive compound and on the other side a film of a synthetic plastics material on which is superimposed a silicone coating. The sound absorbing sheets may be arranged in stacks without adhering together, as the adhesive compound will not adhere to the silicone. The sheets may be applied to vehicle metal body panels by means of the adhesive. The plastics material may be a polyester resin.

Mounting bracket for strain sensor

Repositionable self-adhesive closed-cell solid-foam insulation material

Repositionable self-adhesive closed-cell solid-foam insulation material

Multi-layer sheet providing acoustic and thermal insulation comprises a cellular layer 2 adhered to a facing layer 1 and a repositionable, pressure sensitive adhesive (PSA) faced layer 5. Prior to use, this PSA is in contact with a peelable, protective, release paper or film 6. The cellular layer 2 is a solid closed cell foam comprising gas filled cells 3 of deformable thermoplastic. The facing layer 1 is preferably a metallic, especially 50-200 µm thick aluminium, foil adhered to the polyethylene foam 2 via a PSA layer 4. Additional, adhesive layers 4 of viscoelastic, especially butyl rubber, are used. The preferred foam 2 is 2-10 (3-5) mm thick and contains fire retardant and air filled cells 3 with polydisperse size distribution and longest dimension of 0.1-5 (0.5-3) mm. The insulating method and kit are claimed. The insulation is used on heating, ventilation and air-conditioning pipes and ducting.

Fluid end with modular intake manifold

MUFFLER FOR A VENTILATION CHANNEL

ARRANGEMENT FOR THE ABSORPTION OF AIRBORNE SOUND

DEVICE TO THE DISMANTLING OF OSCILLATIONS IN PIPINGS

ARRANGEMENT FOR THE ABSORPTION OF AIRBORNE SOUND

SOUND ABSORBING MECHANISM FOR LUFTFUEHRENDE CHANNELS OF AIR CONDITIONING SYSTEMS AND SUCH A THING.

HOSE.

DEVICE TO THE DISMANTLING OF OSCILLATIONS IN PIPINGS

ABSORBING MUFFLER, IN PARTICULAR FOR AIR DUCTS OF PAPER FACTORIES.

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

INORGANIC FIBRE MASSES

Modal attenuator for reducing noise

A modal attenuator may include an attenuator body (12) having a lead-in segment (26) and a lead-out segment (28) joined by a connection segment (30), a perforated screen (32) disposed within the attenuator body and spaced apart from the attenuator body to form an annular space, and a plurality of rings disposed between the perforated screen and the attenuator body. When fluid flows through the modal attenuator, sound waves pass through the perforated screen (32) and are reflected back by the plurality of rings to disrupt other sound waves, thereby reducing fluid noise in the modal attenuator.

NOISE REDUCING GAS FLOW DEVICE USING COMPACTED KNITTED WIRE MESH FABRIC

Verfahren zur Fortleitung von Gasströmungen unter gleichzeitiger Schallabsorption in Kanälen.

Schalldämpfungskanal

Schalldämpfer in einer Leitung

IN AN AIR DUCT ARRANGEMENT SILENCING DEVICE.

Muffler for the absorption of noises, which develop when withdrawing exhaust gases from an exhaust escape flue.

Sanitary installation system with sound protection.

Ein Sanitärinstallationssystem (1) umfasst eine fest mit einem Gebäude (G) verbindbare Montagestruktur (2), mindestens ein die Montagestruktur (2) verdeckendes Verkleidungselement (3), und mindestens ein wasserführendes Sanitärelement (4), wobei die Montagestruktur (2) und das mindestens eine Verkleidungselement (3), einen Hohlraum (5) definieren, wobei mindestens eines der wasserführenden Sanitärelemente (4) im Hohlraum (5) angeordnet ist und wobei im Hohlraum (5) mindestens ein Schallabsorptionselement (6) angeordnet ist und wobei das mindestens eine Schallabsorptionselement (6) mit mindestens einem Befestigungselement (11) an der Montagestruktur (2) befestigt ist.

DAMPING DEVICE

Ce dispositif d'amortissement (1) comprend un corps (4) définissant une chambre (6) et présentant au moins un orifice (8, 10) destiné à l'entrée et à la sortie du fluide dans la chambre (6). Le dispositif d'amortissement (1) comprend en outre i) un organe d'amortissement (14) situé dans la chambre (6) et comprenant au moins une mousse à cellules fermées, et ii) un organe de maintien (16) configuré pour maintenir en place l'organe d'amortissement (14).

NOUVEAU REVETEMENT ISOPHONIQUE ET ISOTHERMIQUE A DEUX COMPOSANTS

L'invention concerne un revêtement isophonique et isothermique à deux composants, l'un liquide et l'autre solide, que l'on mélange au moment de l'emploi. Selon l'invention, le composant liquide comprend, d'une part, une résine plastique en solution ou en suspension dans de l'eau et, d'autre part, un agent anionique apte à former des bulles avec un composé du composant solide, tandis que ledit composant solide comprend, outre ledit composé apte à réagir avec ledit agent anionique, un composé apte à prendre en masse au contact de l'eau. Application à l'insonorisation de machines ou de bâtiments.

TOGETHER FOR the ABSORPTION OF the SOUNDS TRANSMITTED BY the AIR

ANISOMETRIC COMPRESSED AND BONDED MULTILAYER KNITTED WIRE MESH COMPOSITES

Improvements to pipes, particularly flexible pipes, which are subjected to vibrations or the like

The pipe according to the invention, particularly a flexible pipe for transporting exhaust gases from an internal combustion engine for a motor vehicle which includes a pipe body 1 and at least one rigid member 2 for mounting on a support, is characterised in that it further includes between the body 1 and the mounting member 2 at least one shock-absorbing element 3 capable of absorbing, at least partially, the mechanical stresses transmitted by the support to the mounting member 2, so as to isolate the body 1 from the said stresses.

ACOUSTIC DEVICE Of ATTENUATION Of a VENTILATION SHAFT Of a MOTOR VEHICLE AND METHOD FOR REALIZATION Of SUCH a DEVICE

Sound and heat insulating compsn. - comprises liquid and solid parts, one contg. resin soln. and anionic cpd. and the other setting agent and bubble former

TOGETHER FOR the ABSORPTION OF the SOUNDS TRANSMITTED BY the AIR

Repositionable self-adhesive closed-cell solid-foam insulation material

La présente invention concerne un matériau multicouche autocollant, léger pour construction qui produit une isolation thermique ou acoustique comprenant une couche de revêtement, une couche de liaison de revêtement comprenant un film adhésif, au moins une couche de mousse solide et une couche de face adhésive. La couche de masse solide (2) comprend une mousse solide de gaz piégé dans des cellules thermoplastiques (3) et la couche de face adhésive (5) comporte une face adhésive autocollante. Une couche de revêtement (1) présente une réflexion thermique ou d'autres propriétés et la couche de face adhésive (5) est protégée par un film antiadhésif (6) avant installation. Le matériau est installé par découpe aux dimensions requises avant de retirer le film antiadhésif (6) et collage du matériau au moyen d'une légère pression pour appliquer la couche de face adhésive (5) sur la région devant être isolée.

ATENUADOR DE MODO SIMPLIFICADO

Un atenuador de modo puede incluir un cuerpo del atenuador que tiene un segmento de entrada y un segmento de salida unidos por un segmento de conexión, una pantalla perforada dispuesta en el cuerpo del atenuador y separada del cuerpo del atenuador para formar un espacio anular, y una pluralidad de anillos dispuesta entre la pantalla perforada y el cuerpo del atenuador. Cuando el fluido fluye a través del atenuador de modo, las ondas sonoras pasan a través de la pantalla perforada y se reflejan a través de una pluralidad de anillos para interrumpir otras ondas sonoras, reduciendo e ruido del fluido en el atenuador de modo.

LJUDFELLA

EXHAUST PIPE

Provided is an exhaust pipe wherein a sufficient noise reduction effect and a prevention effect for reduction of the temperature of an exhaust gas can be obtained even if the exhaust pipe is bent. An exhaust pipe (1) has an inner tube (10) for introducing exhaust gas, and an outer tube (11) fitted on the inner tube (10). Projected portions (12) obtained by radially inwardly projecting several parts of the inner peripheral surface of the outer tube (11) in the circumferential direction, and extending the same in the tube axis direction, are provided on the inner peripheral surface of the outer tube (11). A plurality of air chambers partitioned by the projected portions (12) are formed between the outer peripheral surface of the inner tube (10) and the inner peripheral surface of the outer tube (11), and an intermediate member (15) is provided between the outer peripheral surface of the inner tube (10) and the projected portions (12).

Absorptive sound attenuator, in particular for air ducts in paper mills

УСТАНОВОЧНЫЙ КРОНШТЕЙН ДЛЯ ТЕНЗОДАТЧИКА

FIELD: measurement equipment. SUBSTANCE: device involves a mechanical clamp. The clamp includes a lower flexible portion comprising an arcuate portion ending in a first extreme and a second end, the first and second upper flexible portions comprising arcuate portions ending in the first extreme ends and in the second extreme ends at the node of the pivot pin comprising a hole parallel to the central longitudinal clamping axis, said opening extending therethrough adapted to receive a removable connector. Levers mounting sensor is located externally on the first and second upper flexible portions of the sensor mounting said arms comprise at least one receiving recess adapted sized to receive and hold the ends of the strain gauge. EFFECT: improved reliability of fastening of the gauge and measurement accuracy. 26 cl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 622 949 C1 (51) МПК E21B 47/01 (2012.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2016117341, 27.12.2013 (24) Дата начала отсчета срока действия патента: 27.12.2013 (72) Автор(ы): СОБОЛЕВСКИЙ Збигнев (US), СИТКА Марк А. (US) 21.06.2017 Приоритет(ы): (22) Дата подачи заявки: 27.12.2013 (56) Список документов, цитированных в отчете о поиске: WO 2009056853 A1, 07.05.2009. SU (85) Дата начала рассмотрения заявки PCT на национальной фазе: 05.05.2016 (86) Заявка PCT: US 2013/077990 (27.12.2013) (87) Публикация заявки PCT: Адрес для переписки: 197101, Санкт-Петербург, а/я 128, "АРСПАТЕНТ", М.В. Хмара R U 2 6 2 2 9 4 9 (54) УСТАНОВОЧНЫЙ КРОНШТЕЙН ДЛЯ ТЕНЗОДАТЧИКА (57) Формула изобретения 1. Установочная система для установки тензодатчика на полую трубу, содержащая: механический зажим, имеющий центральную продольную ось, причем указанный механический зажим содержит множество участков, включая: нижний гибкий участок, содержащий дугообразный участок, завершающийся на первом крайнем конце в первой крепежной лапке, и указанный нижний ...

SCHALLDAEMPFUNGSVORRICHTUNG, INSBESONDERE ZUR DAEMPFUNG DES SICH IN LUFTKANAELEN AUSBREITENDEN GERAEUSCHES

Fluidkanal

Die Erfindung betrifft einen Fluidkanal (1) mit einer Wand (2), wobei der Fluidkanal (1) einen gekrümmten Verlauf aufweist, so dass nur zwischen einem Teilbereich der Eingangsöffnung und einem kleinen Teilbereich der Ausgangsöffnung eine lineare Verbindung möglich ist. Hierbei ist im Fluidkanal (1) mindestens ein Strömungsleitelement (5, 6) vorgesehen, welches den Fluidkanal in zwei Teilfluidkanäle (11, 12) unterteilt und zumindest mit einem Teilbereich in dem Bereich des Fluidkanals (1) angeordnet ist, in welchem eine lineare Verbindung zwischen der Eingangsöffnung und der Ausgangsöffnung möglich ist und eine Verblockung in Wellenform vorgesehen ist.

Tube, particularly hydraulic tube for motor vehicles or hydraulic pumps, comprises tube mantle, which is lined radially inside with porous material in sections for sound absorption or for sound proofing

The tube (1) comprises a tube mantle (2), which is lined radially inside with a porous material (3) in sections for sound absorption or for sound proofing. The porous material comprises an open porosity, and is formed as firm foam or comprises a firm foam. The porous material comprises a wire fabric or is formed as a wire fabric. The porous material is made of plastic or ceramic or metal. An independent claim is included for a method for manufacturing a tube, which comprises a tube mantle.

Damping seal

The present invention relates to a damping seal which is used for sealing off a pipe, such as a fuel nozzle, in a housing, e.g. a fuel canister or tank. The damping seal provides increased sealing performance when the pressure in the interior of the housing rises, and furthermore damps vibrations which may occur between the housing and the pipe. The damping seal has a damping section which has outer and inner protuberances which extend in the longitudinal direction in order to define outer and inner contact surfaces for the damping seal. The inner and outer protuberances are offset relative to one another in the circumferential direction in order to increase the vibration-damping properties of the damping seal. In addition, inner and outer seals, which have a U-shaped channel arranged between them, are provided for sealing on a pipe or on a housing, the U-shaped channel facilitating or ensuring firm loading or preloading of the inner and outer seals into engagement with the interacting ...

Druckluft-Entlüftungseinrichtung.

Schallabsorptionsfilter fuer Gasleitungen, insbesondere Lueftungsleitungen

Sound suppression apparatus

A sound suppression apparatus 100 for installation inside a gas transport duct is provided. The sound suppression apparatus comprises a resistive sound-absorbing element 110 and a housing 130 providing a reactive sound-attenuating element communicating with a surrounding of the apparatus via openings 131a, 131b in an outer surface of the housing. An outer surface of the sound suppression apparatus comprises an outer surface of the resistive sound-absorbing element and the outer surface of the housing. A gas transport duct comprising the sound suppression apparatus is also provided. The housing may extend from the resistive sound-absorbing element. The apparatus may have an elongate form in a longitudinal direction from a first end to a second end, and the resistive sound-absorbing element may be arranged closer to the first end than the housing, and the housing may have a profile in a plane including the longitudinal direction and which tapers in the longitudinal direction.

A SOUND ATTENUATOR

Sound-absorbing member, e.g., for ducts

899,685. Silencing gaseous currents. BOLT, BERANEK & NEWMAN Inc. Dec. 29, 1959, No. 44145/59. Class 7(2). A sound-absorbing member 5 for lining or positioning in a duct 2 comprises a plurality of rigid supporting members 6 having at least one of their ends covered by a thin non-selfsupporting relatively flexible porous sheet S with a resistive impedance, the spacing between the supporting members being large compared with the pores of the sheet S but small compared with the width of the free space in the duct P, the spacing being sufficiently small to provide support for the sheet S in order to prevent its sagging and flexing. As shown in Fig. 1, the U-shaped sound-absorbing member 5 comprises a honeycomb structure 6 secured at one end 13 to the inner surfaces 1, 3 of the duct 2. The cellular members 6 which may be of metal or paperboard have their free ends covered by the sheet S consisting of a synthetic plastic sheet 7, perforated at 9, laminated with inner and outer flexible porous materials 11, 11<SP>1</SP>, such as "tea-bag" paper or porous cellulose film. The sheet member 11- 7-11<SP>1</SP> may be interrupted at the crests C of the member 5 and the members 6 may be omitted in this exposed region, baffles then bounding this region. The plastic sheet 7 may be used without the sheets 11, 11<SP>1</SP> and the cellular structure may be filled with sound absorbent material. In another embodiment Fig. 10, the member 5 is formed into a helical structure disposed in a circular or oval duct 1 with the inner walls preferably lined with a circular or oval form of structure 6-11-7-11<SP>1</SP>. Specifications 720,448, 721,859, 721,860, 800,103 and 821,923 are referred to.

De-rotators with added sound attenuation

ANORDNUNG ZUR ABSORPTION VON LUFTSCHALL

FLUID CHANNEL

MUFFLER FOR LOW FREQUENCIES, PARTICULARLY FOR AIR DUCTS IN PAPER FACTORIES.

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

MUFFLER FOR A VENTILATION CHANNEL

Acoustic plumbing pipe insulation

SOUND SILENCING METHOD AND APPARATUS

A SMOKE AND SOUND BARRIER FOR A BUILDING PENETRATION

Described herein is a smoke and sound barrier for construction assemblies comprising a penetration wherein, optionally a packing material, and a non-porous adhesive article are used.

ABSORPTIVE SOUND ATTENUATOR, IN PARTICULAR FOR AIR DUCTS IN PAPER MILLS

Sound attenuation systems

Methods and devices for increasing the sound attenuation properties of a noise suppression device are provided. In some embodiments, a sound attenuating conduit (68) has an improved shape that provides increased sound attenuation properties. In other embodiments, the sound attenuating conduits (68) are stacked together, and shaped to increase the air flow cross-section. Still other embodiments provide machinery that includes the improved sound attenuating conduits (68).

Panel of sound-proofing

Acoustic body of absorption to wide strip and weak reflexion for sounds transmitted in liquids and solids

DEVICE FOR REDUCING THE NOISE EMITTED BY A CONDUIT AND DUCT OF AIRCRAFT EQUIPPED WITH SUCH A DEVICE

FOR SOUND ABSORPTION MATERIAL

Silencieux (1) pour un conduit d'aération comprenant un baffle (2) et un premier matériau (4), ledit baffle (2) comprenant un cadre (3) qui délimite un volume interne, ledit volume interne étant rempli par ledit premier matériau, ledit premier matériau (4) comprenant un module d'Young inférieur à 20 000 N.m-2 et une résistance à l'écoulement de l'air comprise entre 10 000 et 200 000 N.s.m-4 ...

Silencer for drains of ventilation and others

Tubular body soundproof cover and covered tubular body

A purpose is to provide a tubular body soundproof cover and a covered tubular body, for which elastic deformation of the tubular body is unlikely to be inhibited. The tubular body soundproof cover includes a sound absorbing layer arranged on outside in an axially perpendicular direction of a tubular body having tubular body side curved sections; a skin layer arranged on outside in the axially perpendicular direction of the sound absorbing layer; and cover side curved sections arranged on outside in the axially perpendicular direction of the tubular body side curved sections, including at least a portion of the sound absorbing layer and at least a portion of the skin layer. The cover side curved sections have non-adherent sections in which the sound absorbing layer and the skin layer are not bonded over the entire circumferential length.

SIMPLIFIED MODAL ATTENUATOR

A modal attenuator may include an attenuator body having a lead-in segment and a lead-out segment joined by a connection segment, a perforated screen disposed within the attenuator body and spaced apart from the attenuator body to form an annular space, and a plurality of rings disposed between the perforated screen and the attenuator body. When fluid flows through the modal attenuator, sound waves pass through the perforated screen and are reflected back by the plurality of rings to disrupt other sound waves, thereby reducing fluid noise in the modal attenuator. 1. A modal attenuator for reducing noise in a process system having fluid flowing through a pipe , the modal attenuator comprising:an attenuator body having a lead-in segment and a lead-out segment joined by a connection segment;a perforated screen disposed within the attenuator body and spaced apart from the attenuator body to form an annular space; anda plurality of rings disposed between the perforated screen and the attenuator body;wherein sound waves pass through the perforated screen and are reflected back by the plurality of rings to disrupt other sound waves, thereby reducing noise in the modal attenuator.2. The modal attenuator of claim 1 , further comprising a plurality of walls disposed on an inner surface of the attenuator body claim 1 , the walls extending substantially perpendicular to a direction of fluid flow through the attenuator body claim 1 , and the walls defining a plurality of cavities between the screen body and the attenuator body.3. The modal attenuator of claim 2 , wherein the at least two cavities in the plurality of cavities differ in volume.4. The modal attenuator of claim 3 , wherein the cavities increase in volume from an inlet towards a connecting segment.5. The modal attenuator of claim 4 , wherein the cavities decrease in volume from the connecting segment towards an outlet.6. The modal attenuator of claim 5 , wherein the plurality of cavities approximate a curve when ...

TURN-KEY ACCOUSTIC PIPE LAGGING SYSTEM

A pipe lagging system for acoustically insulating a drain piping system includes at least one drain pipe and drain pipe connector coupled to the drain pipe. The pipe lagging system includes at least one preformed acoustic lagging sleeve adapted to be put over the drain pipe of the piping system for acoustical insulation, at least one preformed acoustic clamshell jacket adapted to fit over the drain pipe connector of the piping system for acoustically insulating the pipe connector. The clamshell jacket is adapted to receive an end portion of the tubular sleeve put over the drain pipe. At least one mechanical fastener is adapted to mechanically secure the clamshell jacket and the received tubular sleeve to the underlying drain pipe. At least one of the at least one tubular sleeve and clamshell jacket includes a sound-insulating foam material. 1. A pipe lagging system for acoustically insulating a drain piping system comprising at least one drain pipe and drain pipe connector coupled to the drain pipe , the pipe lagging system comprising:at least one preformed acoustic lagging sleeve adapted to be put over the drain pipe of the piping system for acoustical insulation;at least one preformed acoustic clamshell jacket adapted to fit over the drain pipe connector of the piping system for acoustically insulating the pipe connector, wherein the clamshell jacket is adapted to receive an end portion of the tubular sleeve put over the drain pipe; andat least one mechanical fastener adapted to mechanically secure the clamshell jacket and the received tubular sleeve to the underlying drain pipe;wherein at least one of the at least one tubular sleeve and clamshell jacket comprises a sound-insulating foam material.2. The pipe lagging system according to claim 1 , wherein the sound-insulating foam material comprises at least one polyolefinic foam.3. The pipe lagging system according to claim 1 , wherein at least one of the at least one tubular sleeve and clamshell jacket is made of ...

MOUNTING BRACKET FOR STRAIN SENSOR

The subject matter of this specification can be embodied in, among other things, a system for mounting a strain sensor on a tubular pipe, which includes a mechanical clamp. The clamp has a bottom flexing section having an arcuate portion terminating at a first terminal and at a second end, and a first and second upper flexing sections having an arcuate portions terminating at first terminal ends and at second terminal ends in a pivot pin assembly having a bore parallel to a central longitudinal axis of the clamp, the bore there through for receiving a removable connector. Sensor mounting arms are disposed outwardly on the first and second upper flexing sections, said sensor mounting arms including at least one receptacle sized to receive and retain ends of a strain gauge. 1. A method of mounting a strain sensor to a pipe comprising: a bottom flexing section having an arcuate portion terminating at a first terminal end in a first mounting wing and said bottom flexing section terminating at a second end in a second mounting wing, each of said mounting wings including an opening through the wing for receiving a removable connector;', 'a first upper flexing section having an arcuate portion terminating at a first terminal end in a first mounting wing and said first upper flexing section terminating at second terminal end in a pivot pin assembly having a bore parallel to the central longitudinal axis of the clamp, the mounting wing having an opening through the wing for receiving a removable connector;', 'a second upper flexing section having an arcuate portion terminating at a first terminal end in a first mounting wing and said first upper flexing section terminating at second terminal end in a pivot pin assembly having a bore parallel to the central longitudinal axis of the clamp, the mounting wing having an opening through the wing for receiving a removable connector;', 'a first sensor mounting arm disposed outwardly on the first upper flexing section, said sensor ...

METHOD OF MAKING AN INLINE HOUSING FOR A PART ENCLOSED IN A TUBE

A method is disclosed for making a duct assembly including an internal component part such as a silencer is disclosed. The duct assembly may be made in a blow-molding operation in which first and second duct parts are formed from a single parison as a combined part that is then split apart to receive a component part in a housing and subsequently closed by a closure part. Alternatively, the first and second housing parts may be separately formed and a component part may be inserted into a housing defined by one or both of the first and second duct parts. The first and second duct parts may be joined and sealed by injection molding a ring over telescopically assembled ends of the first and second parts. 1. A method of making a duct comprising:blow-molding a single parison in a die to form a first duct part including a housing and a second duct part including a closure member;severing the closure member from the housing;inserting a component part into the housing;assembling the closure member to the housing to enclose the component part; andjoining and sealing the closure member to the housing.2. The method of wherein the step of joining and sealing further comprises:heating a first flange of the closure member and a second flange of the housing on opposite sides of a heated plate; andcompressing the first flange and the second flange together after the heating step.3. The method of wherein the step of joining and sealing further comprises:placing the closure member and the housing into an injection molding die with the closure member being telescopically received over the housing; andmolding a ring over a portion of the housing and a portion of the closure member.4. The method of wherein the step of severing the closure member from the housing is performed with a heated knife.5. The method of wherein the housing has a greater cross-section in a radial direction than the first duct part.6. The method of wherein the component part is a silencer formed of an energy ...

PIPE CLIP WITH TIGHTENING SCREW HAVING TORQUE LIMITING CAP

A pipe clip includes a metal annular clip body having at least two opposing radial flanges defining an opening adapted to arrange the pipe clip around a pipe. The clip body has at one of the radial flanges a female fastening. The pipe clip includes a tightening screw having a head and a shank. The shank is provided with a male thread adapted to cooperate with the female fastening. The head engages the other of the flanges so as to tighten the flanges towards each other and tighten the pipe clip around the pipe. The pipe clip has a vibration insulating lining provided on the inner side of the clip body. A torque limiting cap is arranged on the screw head of the tightening screw. The torque limiting cap includes at least one torque transferring feature that couples the cap to the screw head in a rotational direction. 1. A pipe clip comprising a metal annular clip body having at least two opposing radial flanges defining an opening adapted to arrange the pipe clip body around a pipe ,wherein the pipe clip body has at one of the radial flanges a female fastening means and wherein the pipe clip comprises a tightening screw having a screw head and a screw shank, said screw shank being provided with a male thread adapted to cooperate with the female fastening means,wherein the screw head engages the other of the radial flanges so as to tighten the flanges towards each other and tighten the pipe clip around the pipe,wherein the pipe clip has a vibration insulating lining provided on the inner side of the annular clip body, andwherein a torque limiting cap is arranged on the screw head of the tightening screw, said torque limiting cap including at least one torque transferring feature that couples the cap to the screw head in a rotational direction.2. The pipe clip according to claim 1 , wherein the torque limiting cap is made of plastic and has on an inner side a torque transferring protrusion that mates with a recess in the screw head such that a torque can be transferred ...

DUCT LINER

A duct liner arranged in a roll including an insulation layer having a first face surface and a second face surface that is opposed to and spaced apart from the first face surface and a fiberglass mat facing disposed on the first face surface, such that the majority of the first face surface is covered by the facing, wherein the fiberglass mat facing is not disposed on the second face surface, and wherein the duct liner is rolled such that the fiberglass mat and first face surface is radially outward of the second face surface. 1. A duct liner arranged in a roll , comprising:an insulation layer having a first face surface and a second face surface that is opposed to and spaced apart from the first face surface; anda fiberglass mat facing disposed on the first face surface, such that the majority of the first face surface is covered by the facing,wherein the fiberglass mat facing is not disposed on the second face surface, andwherein the duct liner is rolled such that the fiberglass mat and first face surface is radially outward of the second face surface.2. The duct liner of wherein the fiberglass mat facing covers substantially the entire first face surface.3. The duct liner of wherein the insulation layer is made from a fibrous material.4. The duct liner of wherein the facing is adhered to the insulation layer with an adhesive.5. The duct liner of wherein the adhesive is a waterless claim 1 , thin-film thermoplastic adhesive that is heat activated.6. The duct liner of wherein the facing is adhered to the insulation layer by mechanical fasteners.7. The duct liner of wherein the facing is a single sheet of material.8. The duct liner of wherein the facing is a non-woven mat formed with glass fibers and an acrylic binder.9. The duct liner of wherein the facing has a thickness of approximately 0.5 mm.10. A method of making a duct liner comprising:providing an insulation layer having a first face surface and a second face surface that is opposed to and spaced apart from ...

Vibration reducing rubber composition

Disclosed is a vibration reducing rubber composition, more specifically to a vibration reducing rubber composition that reduces inflow of vibration and noise generated from an engine into an interior of an automobile, and improves riding comfort, emotional quality and merchantable quality of the automobile, by providing a particular formulation of a heater hose composition, which comprises ethylene propylene rubber (EPDM), fast extruding furnace (FEF) carbon black and semi reinforcing furnace (SRF) carbon black.

METHOD AND APPARATUS FOR SUPPRESSING UNDESIRABLE TONES IN AN EXHAUST SYSTEM

Provided is a flow modification component for use with a muffler, which can be a Helmholtz resonator muffler, a side branch muffler, or a Y-pipe. The flow modification component includes a porous plate adapted for incorporation into a passage to a sound muffling portion connected to a through passage pipe of the muffler or Y-pipe. One or more openings are formed on the porous plate to allow low frequency acoustic waves to pass through into the passage to the sound muffling portion while reducing large-scale turbulent eddies that produce undesirable resonant tones within the aperture tube to small-scale turbulent eddies. The openings having sufficient porosity such that the resulting sound frequency is determined by size, shape, number, and spacing of the openings. The flow modification component can also include a dissipative material component in an internal port passage of the muffler to further reduce resonant tones. 1. A muffler comprising:a through passage pipe comprising an inlet for admitting a flow of exhaust gases;a diverging pipe that branches off from the through passage pipe;a flow modification component incorporated into one of the diverging pipe or the through passage pipe at a position proximate to a junction of the through passage pipe and the diverging pipe, wherein the flow modification component comprises at least one structure that allows low frequency acoustic waves to pass through while reducing large-scale turbulent eddies that produce undesirable resonant tones to small-scale turbulent eddies.2. The muffler of claim 1 , wherein the flow modification component is incorporated into an opening in the diverging pipe at a position proximate to the junction of the through passage pipe and the diverging pipe and flush to the through passage pipe.3. The muffler of claim 2 , wherein the at least one structure of the flow modification component comprises a porous plate having a screen pattern geometry in the form of a plurality of openings having ...

Method of making an inline housing for a part enclosed in a tube

A method is disclosed for making a duct assembly including an internal component part such as a silencer is disclosed. The duct assembly may be made in a blow-molding operation in which first and second duct parts are formed from a single parison as a combined part that is then split apart to receive a component part in a housing and subsequently closed by a closure part. Alternatively, the first and second housing parts may be separately formed and a component part may be inserted into a housing defined by one or both of the first and second duct parts. The first and second duct parts may be joined and sealed by injection molding a ring over telescopically assembled ends of the first and second parts.

Vapour Barrier Lamina

A vapour barrier lamina, particularly for acoustic insulation of a pipe or duct, including a fiberglass moisture-proof foil layer, an acoustic insulation layer adjacent a first side of the moisture-proof layer, and a protection layer adjacent a second side of the moisture-proof layer. The vapour barrier lamina may also include a structural layer located between the moisture-proof foil layer and the acoustic insulation layer, for additional protection, and the structural layer may be a fiberglass screen. 1. A vapour barrier lamina for acoustic insulation of a pipe , the vapour barrier lamina comprising:a moisture-proof foil layer;an acoustic insulation layer adjacent a first side of the moisture-proof foil layer; anda protective layer adjacent a second side of the moisture-proof layer.2. The vapour barrier lamina of claim 1 , wherein the acoustic insulation layer abuts the first side of the moisture-proof foil layer.3. The vapour barrier lamina of claim 1 , wherein the protective layer abuts the second side of the moisture-proof foil layer.4. The vapour barrier lamina of claim 1 , wherein the vapour barrier lamina further comprises:a structural layer for improving the tear strength of the vapour barrier system.5. The vapour barrier lamina of claim 4 , wherein the structural layer is located between the moisture-proof foil layer and the acoustic insulation layer and provides additional protection of the moisture-proof foil layer.6. The vapour barrier lamina of claim 4 , wherein the structural layer is a fiberglass scrim.7. The vapour barrier lamina of claim 1 , wherein the moisture-proof foil layer is a metal foil claim 1 , a polymeric film claim 1 , or a silicone coated fabric.8. The vapour barrier lamina of claim 1 , wherein the vapour barrier lamina has a permeance range of 0.0875 to 7.5 ng·Pa·s·m(0.0015 to 0.13 perms (inch-pound)).9. The vapour barrier lamina of claim 1 , wherein the moisture-proof foil layer is made of a flame resistant material.10. The vapour ...

A SMOKE AND SOUND BARRIER FOR A BUILDING PENETRATION

Described herein is a smoke and sound barrier for construction assemblies comprising a penetration wherein, optionally a packing material, and a non-porous adhesive article are used. 1. Use of a non-porous adhesive article , and optionally a packing material , on a construction assembly to provide a smoke and sound barrier system ,wherein the non-porous adhesive article comprises a substrate and an adhesive disposed on a first major surface of the substrate;wherein the construction assembly comprises a first major surface and an opposing second major surface and further comprises a first penetration which intersects the first major surface, the first major surface further comprises a first attachment area located about the perimeter of the penetration;wherein the first penetration optionally comprises the packing material; andwherein the non-porous adhesive article is fixedly attached to the first attachment area.2. The use as in claim 1 , further comprising a penetrating object having a second attachment area claim 1 , wherein the penetrating object passes through the first penetration and extends beyond the first major surface of the construction assembly claim 1 , wherein the non-porous adhesive article is fixedly attached to the first attachment area and the second attachment area.3. The use as in claim 1 , wherein the second major surface comprises a second penetration which intersects the second major surface of the construction assembly claim 1 , the second major surface further comprises a third attachment area located about the perimeter of the second penetration; wherein the second penetration optionally comprises the packing material; and wherein the non-porous adhesive article is fixedly attached to the third attachment area.4. The use as in claim 3 , further comprising a penetrating object having a fourth attachment area claim 3 , wherein the penetrating object passes through the second penetration and extends beyond the second major surface of the ...

Microperforated conduit

Provided are conduits for air flow that are capable of reducing noise and related methods. The provided conduits include a first section that is tubular and substantially non-perforated and a second section with at least a portion having a multiplicity of microperforations that provide an average flow resistance of from 50 MKS Rayls to 8000 MKS Rayls therethrough. The second section is either (a) tubular and connected in series with the first section, with an outer surface of the second section being in fluid communication with an outer surface of the conduit, or (b) disposed within the first section.

EXHAUST AIR CONDUIT FOR A COATING AGENT PUMP

An exhaust air conduit for a pneumatically powered pump, in particular, from a coating agent pump in a painting plant, is provided. The conduit includes an inlet for receiving the exhaust air from the pump, an outlet for discharging the exhaust air, and an exhaust air channel in which the exhaust air flows from the inlet to the outlet of the exhaust air conduit, and a housing member in which the exhaust air channel extends. A first thermal insulation element is provided in the region of a direction change of the exhaust air channel, in order to prevent an accumulation of the exhaust air directly at the inner wall of the exhaust air channel and thereby to lessen the cooling of the housing member. 110.-. (canceled)11. An exhaust air conduit for a pneumatically powered pump , the exhaust air conduit comprising:a housing member;an inlet in the housing member configured to receive exhaust air from the pump,an outlet in the housing member, configured to discharge the exhaust air, andan exhaust air channel in an interior region of the housing member, the exhaust air channel extending from the inlet to the outlet, the exhaust air channel including a first thermal insulation element at a direction change portion of the exhaust air channel, the exhaust air channel being configured to direct a flow of the exhaust air at the direction change portion into the first thermal insulation element.12. The exhaust air conduit according to claim 11 , wherein the exhaust air channel claim 11 , from the inlet to the outlet claim 11 , has a maximum cross-sectional area at the inlet.13. The exhaust air conduit according to claim 11 , the exhaust air channel has a substantially constant cross-sectional area from the inlet to the outlet.14. The exhaust air conduit according to claim 11 , wherein a sound damper is fluidly connected to the outlet of the exhaust air conduit claim 11 , the sound damper being configured to receive the exhaust air discharge from the outlet claim 11 , accommodate ...

NOISE ATTENUATION UNIT FOR ENGINE SYSTEMS

Noise attenuation units are disclosed that are connectable in a system as part of a fluid flow path. Such units include a housing defining an internal cavity and having a first port and a second port each connectable to a fluid flow path and in fluid communication with one another through the internal cavity, and a noise attenuating member seated in the internal cavity of the housing within the flow of the fluid communication between the first port and the second port. The noise attenuating member enables the fluid communication between the first port and the second port to flow through the noise attenuating member. 1. A noise attenuation unit connectable to a fluid flow path of an engine comprising:a housing consisting essentially of a first housing portion defining a first port and a second housing portion defining a second port, the first housing portion and the second housing portion are mated together with a fluid-tight seal to define an internal cavity in fluid communication with the first port and the second port; anda porous noise attenuating material dimensioned for a tight fit within the internal cavity and seated therein;wherein fluid flow from the first port to the second port through the internal cavity is only through the porous noise attenuating material.2. The noise attenuation unit of claim 1 , wherein the first port and the second port are aligned opposite one another and the porous noise attenuating material is sandwiched between a first seat of the first housing portion and a second seat of the second housing portion.3. The noise attenuation unit of claim 2 , wherein one or more of the first port and the second port include an elbow.4. The noise attenuation unit of claim 1 , wherein one of the first housing portion and the second housing portion defines a container for the noise attenuating member and the other thereof defines a cap for the container.5. The noise attenuation unit of claim 1 , further comprising a sealing member seated between the ...

SOUND ATTENUATION APPARATUS

A stacked cavity structure for arrangement on a mounting surface of a duct includes a support spine configured to be arranged on the mounting surface and extending into the duct with a longitudinal axis defining a longitudinal orientation. The stacked cavity structure includes a plurality of arms extending from the support spine and at least partially forming a plurality of overlapping cavities relative to the longitudinal orientation. Each of the plurality of arms includes at least a proximal first arm segment and a distal first arm segment. 1. A stacked cavity structure for arrangement on a mounting surface of a duct , comprising:a support spine configured to be arranged on the mounting surface and extending into the duct with a longitudinal axis defining a longitudinal orientation; anda plurality of arms extending from the support spine and at least partially forming a plurality of overlapping cavities relative to the longitudinal orientation, wherein each of the plurality of arms includes at least a proximal first arm segment and a distal first arm segment.2. The stacked cavity structure of claim 1 , wherein at least one of the plurality of arms includes at least one intermediate first arm segment in between the proximal first arm segment and the distal first arm segment.3. The stacked cavity structure of claim 1 , wherein the plurality of overlapping cavities includes at least three overlapping cavities.4. The stacked cavity structure of claim 1 ,wherein the plurality of arms and the plurality of cavities extend about the support spine with a hexagonal cross-sectional shape, andwherein the stacked cavity structure further comprises a first side wall that surrounds the plurality of arms and the plurality of overlapping cavities.5. The stacked cavity structure of claim 4 , further comprising a passage extending along the longitudinal orientation and positioned between the first side wall and the plurality of arms claim 4 , wherein each of the plurality of ...

SOUND ATTENUATION APPARATUS AND METHODS

A method for manufacturing a sound attenuation apparatus includes generating a three-dimensional digital model of the sound attenuation apparatus and manufacturing the sound attenuation apparatus based on the model using an additive manufacturing technique. The model includes a body with an interior extending between a bottom surface and a top surface; and a stacked cavity structure having a structure inlet; a passage extending from the structure inlet into the interior to a base surface within the interior of the body; a support spine formed within the interior; and a plurality of arms extending from the support spine and at least partially forming a plurality of overlapping cavities with cavity inlets fluidly coupled to the passage. Each of the plurality of arms include a proximal first arm segment extending from the support spine and a first distal arm segment oriented at an angle relative to the proximal first arm segment. 1. A method for manufacturing a sound attenuation apparatus , the method comprising: a body with an interior extending between a bottom surface and a top surface; and', 'a stacked cavity structure comprising a structure inlet formed in the top surface of the body; a passage extending from the structure inlet into the interior of the body to a base surface within the interior of the body; a support spine formed within the interior of the body with a longitudinal axis defining a longitudinal orientation; and a plurality of arms extending from the support spine and at least partially forming a plurality of overlapping cavities relative to the longitudinal orientation with cavity inlets fluidly coupled to the passage, wherein each of the plurality of arms include a proximal first arm segment extending from the support spine and a first distal arm segment oriented at an angle relative to the proximal first arm segment; and, 'generating a three-dimensional digital model of the sound attenuation apparatus, the model comprisingmanufacturing the sound ...

METHOD FOR PRODUCING SILENCING DEVICE, SILENCING DEVICE AND AIR PURIFIER

A silencing device, an air purifier, and a method for producing the same are provided. The method includes that: a sound wave spectrum when an air purifier to be silenced performs operations is acquired; a frequency value, which exceeds a sound wave frequency limit for the air purifier, of the sound wave spectrum is calculated; and a silencing device adapted to the air purifier to be silenced is produced according to the frequency value. At least one structural parameter of the silencing device is configured according to the frequency value. The silencing device is configured to reduce a sound with the frequency value exceeding the sound wave frequency limit. 1. A method for producing a silencing device , comprising:acquiring a sound wave spectrum when an air purifier to be silenced performs operations;calculating a frequency value within the sound wave spectrum, which exceeds a sound wave frequency limit for the air purifier; andproducing a silencing device adapted to the air purifier according to the frequency value, wherein at least one structural parameter of the silencing device is configured according to the frequency value, and wherein the silencing device is configured to reduce a sound with the frequency value exceeding the sound wave frequency limit.2. The method of claim 1 , wherein the silencing device comprises a sound insulation mesh plate and silencing cotton attached to the sound insulation mesh plate claim 1 , and a plurality of meshes are in the sound insulation mesh plate; a sound wave frequency f absorbed by the silencing device is equal to the frequency value; andthe at least one structural parameter of the silencing device comprises a mesh area of the sound insulation mesh plate, a silencing cotton volume corresponding to each mesh and a depth of each mesh.4. The method of claim 3 , wherein the mesh area A is ranged from 0.0625 πmmto 100 πmm claim 3 , the depth L of each mesh is ranged from 0.2 mm to 5 mm claim 3 , and a thickness of the ...

EXHAUST SYSTEM CONDUIT WITH THERMAL/NOISE INSULATION

A flexible conduit for use in a pipe system such as a vehicular exhaust system to provide a torsional or non-torsional joint between two pipes. The conduit has an outer bellows and an inner liner between which a layer of noise/thermal insulation is sandwiched to attenuate noise, resist thermal transmission and dampen vibration. 1. A flexible conduit structure for coupling first and second pipes , comprising:a conduit having first and second ends for connection with said first and second pipes, respectively;an outside portion of said conduit constructed in a manner to provide flexibility to said conduit;an inside portion of said conduit connected to said outside portion and arranged to provide a bore through said conduit for the passage of fluid therethrough; andan insulation blanket sandwiched between said outside and inside portions, said blanket being constructed to suppress noise and heat transmission from within said conduit.2. A conduit structure as set forth in claim 1 , including a covering substantially surrounding said outside portion of said conduit.3. In a vehicle exhaust system claim 1 , the combination of:first and second pipes and a conduit extending between and coupled with said first and second pipes;an outside portion of said conduit having a plurality of corrugations to accommodate flexing of said conduit;a liner on said conduit providing a flow channel through which vehicle exhaust gases can flow, said liner being connected with said outer portion of said conduit; andan insulation blanket sandwiched between said liner and said outside portion of said conduit, said blanket being constructed of a material effective to suppress noise and heat transmission from within said conduit.4. The combination of claim 3 , wherein said liner comprises a metal strip arranged in a helical winding.5. The combination of claim 3 , including a covering substantially surrounding said conduit.6. The combination of claim 5 , wherein said covering comprises a wire braid.7 ...

PIPE WITH SOUND ABSORBER, REFRIGERATION CYCLE APPARATUS, AND METHOD FOR MOUNTING SOUND ABSORBER

A pipe with a sound absorber has a fluid pipe in which fluid passes and a sound absorber of a pulp-based fiber material. The sound absorber surrounds an outer circumference of the fluid pipe. The sound absorber is provided to secure space between an outer surface of the fluid pipe and an inner surface of the sound absorber. 1. A pipe with a sound absorber , comprising:a fluid pipe in which fluid passes; anda sound absorber of a pulp-based fiber material, the sound absorber surrounding an outer circumference of the fluid pipe,the sound absorber being provided to secure space between an outer surface of the fluid pipe and an inner surface of the sound absorber,the sound absorber having paired edge portions,the sound absorber being bent so that inner surfaces of the paired edge portions face one another,the paired edge portions being fixed to one another.2. The pipe with the sound absorber of claim 1 , whereinregarding a section perpendicular to a longitudinal direction of the fluid pipe, a circumferential length of the inner surface of the sound absorber is more than twice a circumferential length of the outer surface of the fluid pipe.3. (canceled)4. The pipe with the sound absorber of claim 1 , whereinthe paired edge portions are stitched together using a nylon thread.5. The pipe with the sound absorber of claim 1 , whereinthe fluid pipe is inserted into an inner circumferential region of the sound absorber so as to be removed therefrom and inserted thereinto.6. A refrigeration cycle apparatus comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the pipe with the sound absorber of .'}7. A method for mounting a sound absorber claim 1 , the method comprising:rounding the sound absorber of a pulp-based fiber material so that the sound absorber surrounds an outer circumference of a fluid pipe in which fluid passes; andmounting a covering portion, which maintains a shape of the sound absorber, around an outer circumference of the sound absorber so that space is ...

MOUNTING BRACKET FOR STRAIN SENSOR

The subject matter of this specification can be embodied in, among other things, a system for mounting a strain sensor on a tubular pipe, which includes a mechanical clamp. The clamp has a bottom flexing section having an arcuate portion terminating at a first terminal and at a second end, and a first and second upper flexing sections having an arcuate portions terminating at first terminal ends and at second terminal ends in a pivot pin assembly having a bore parallel to a central longitudinal axis of the clamp, the bore there through for receiving a removable connector. Sensor mounting arms are disposed outwardly on the first and second upper flexing sections, said sensor mounting arms including at least one receptacle sized to receive and retain ends of a strain gauge. 1. A system for mounting a strain sensor on a tubular pipe , the system comprising: 'a bottom flexing section having an arcuate portion terminating at a first terminal end in a first mounting wing and said bottom flexing section terminating at a second end in a second mounting wing, each of said mounting wings including an opening through the wing for receiving a removable connector;', 'a mechanical clamp having a central longitudinal axis, said mechanical clamp having a plurality of sections includinga first upper flexing section having an arcuate portion terminating at a first terminal end in a mounting wing and said first upper flexing section terminating at second terminal end in a first pivot pin member having a bore parallel to the central longitudinal axis of the clamp, the mounting wing having an opening through the wing for receiving a removable connector; a first sensor mounting arm disposed outwardly on the first upper flexing section, said sensor mounting arm including at least one receptacle sized to receive and retain a first end of a first strain sensor; and', 'a second sensor mounting arm disposed outwardly on the second upper flexing section, said sensor mounting arm including at ...

SILENCING TUBULAR STRUCTURE BODY

Provided is a silencing tubular structure body that has high strength and can be disposed in a narrow space. A tubular member including a tubular portion having a tubular shape, and a frame portion having at least a part formed integrally with an inner peripheral surface side of the tubular portion; and a lid member that is exchangeably disposed on an opening surface of the frame portion of the tubular member are included, in which the frame portion and the lid member form a resonant silencing structure. 1. A silencing tubular structure body comprising:a tubular member including a tubular portion having a tubular shape, and a frame portion having at least a part formed integrally with an inner peripheral surface side of the tubular portion; anda lid member that is exchangeably disposed on an opening surface of the frame portion of the tubular member,wherein the frame portion and the lid member form a resonant silencing structure,the frequency band of the sound silencing structure can be changed by replacing the lid member.2. The silencing tubular structure body according to claim 1 ,wherein the lid member is a plate-like member that is smaller than the opening surface of the frame portion and covers a part of the opening surface, andthe silencing structure is a resonant structure having a hollow portion surrounded by the frame portion and the lid member, and an opening portion of the opening surface that is not covered by the lid member.3. The silencing tubular structure body according to claim 1 ,wherein the lid member has an opening portion, andthe silencing structure is a resonant structure having a hollow portion surrounded by the frame portion and the lid member, and an opening portion formed in the lid member.4. The silencing tubular structure body according to claim 1 ,wherein the frame portion has an opening portion, andthe silencing structure is a resonant structure having a hollow portion surrounded by the frame portion and the lid member, and an opening ...

SPLITTER AND SOUND ATTENUATOR INCLUDING THE SAME

This technology provides a splitter comprising: a first sound absorber; a second sound absorber; a perforated plate member interposed between the first sound absorber and the second sound absorber; and an outer frame surrounding the first sound absorber, the second sound absorber and the perforated plate member; and a sound attenuator comprising: a protective case; a plurality of splitters according to above embodiment formed in the protective case and spaced from each other; and an air passage formed among the plurality of splitters. 1. A splitter comprising:a first sound absorber;a second sound absorber;a perforated plate member interposed between the first sound absorber and the second sound absorber; andan outer frame surrounding the first sound absorber, the second sound absorber and the perforated plate member.2. The splitter of claim 1 , wherein each of the first sound absorber and the second sound absorber comprises a porous sound absorber.3. The splitter of claim 1 , wherein each of the first sound absorber and the second sound absorber comprises one or more selected from the group consisting of an inorganic fiber claim 1 , an organic fiber claim 1 , a chemical fiber claim 1 , a foamed resin material and a sprayed fiber material.4. The splitter of claim 1 , wherein each of the first sound absorber and the second sound absorber has a thickness in a range of 50 to 200 mm.5. The splitter of claim 1 , wherein the perforated plate member comprises one or more selected from the group consisting of a metal plate claim 1 , a gypsum board claim 1 , an asbestos cement board claim 1 , a hard board claim 1 , plywood claim 1 , a wood wool board and a synthetic resin plate.6. The splitter of claim 1 , wherein the perforated plate member has a ratio of a total area of pores to an area of the plate of 1 to 15%.7. The splitter of claim 1 , wherein the perforated plate member further comprises a cap for holding a pore height claim 1 , wherein the cap for holding the pore ...

Compact Modular Low Resistance Broadband Acoustic Silencer

An acoustic silencer for dampening unwanted resonant and pressure pulses in a pipe or duct work and includes an expansion chamber having an enclosed volume through which a pipe or duct work extends, thereby defining an annular volume within the enclosed volume between the process pipe and the expansion chamber. An insert disposed within the annular volume extends along the length of the process pipe and forms an acoustic volume within the annular volume and defines a resonant passage length that is of a length so as to dampen one or more frequencies of the process pipe. An opening is formed through the process pipe along the length of the process pipe that extends through the expansion chamber and is in fluidic communication with the acoustic volume. 1. An acoustic silencer comprising:an expansion chamber having an enclosed volume;a process pipe extending continuously through said enclosed volume;an annular volume defined within said enclosed volume between said expansion chamber and said process pipe along an entire length of the process pipe that extends through said expansion chamber;an insert disposed within said annular volume and extending along the length of the process pipe that extends through said expansion chamber;said insert defining an acoustic volume between said insert and said expansion chamber;said insert defining a resonate passage length within said acoustic volume, wherein said resonate passage length is of a length so as to dampen one or more frequencies of said process pipe; andan opening through said process pipe along the length of the process pipe that extends through said expansion chamber, said opening extending over less than a circumference of said process pipe, and said opening in fluidic communication with said acoustic volume.2. The acoustic silencer of claim 1 , wherein said insert is a C-type insert.3. The acoustic silencer of claim 1 , wherein said C-type insert includes a barrier wall disposed within said annular space and ...

VlBRATION-DAMPING MATERIAL AND METHOD FOR ATTACHING VIBRATION-DAMPING MATERIAL

A vibration-damping material which can be arranged without gaps along the shape of the outer surface of a base material, that is, a vibration-damping material which is attached to a convex curved outer surface of a base material and comprises a vibration-damping member capable of bending deformation and having multiple cuts in an attachment surface to be adhered to the outer surface, thereby dividing the attachment surface into multiple blocks, with the surface of each block opposite the attachment surface being formed connected to each other.

SOUND ATTENUATION APPARATUS AND METHODS

A sound attenuation apparatus includes a body and a stacked cavity structure. The structure includes a structure inlet formed in the top surface of the body; a passage extending from the structure inlet into the interior of the body to a base surface within the body; a first cavity with a first cavity inlet fluidly coupled to the passage and being formed by a first arm, a first side wall within the interior of the body, and the base surface; and a second cavity with a second cavity inlet fluidly coupled to the passage and being formed by a second arm, the first side wall, and the first arm. Each of the first and second arms extends from the first side wall and includes at least two arm segments oriented at different angles relative to the first side wall longitudinal axis. 1. A sound attenuation apparatus for arrangement on a mounting surface of a duct , comprising:a body with an interior extending between a bottom surface facing the mounting structure and a top surface; and a structure inlet formed in the top surface of the body;', 'a passage extending from the structure inlet into the interior of the body to a base surface within the interior of the body;', 'a first cavity with a first cavity inlet fluidly coupled to the passage and being formed by a first arm, a first side wall within the interior of the body with a first side wall longitudinal axis, and the base surface, wherein the first arm extends from the first side wall and includes at least two first arm segments oriented at different angles relative to the first side wall longitudinal axis; and', 'a second cavity with a second cavity inlet fluidly coupled to the passage and being formed by a second arm, the first side wall, and the first arm, wherein the second arm extends from the first side wall and includes at least two second arm segments oriented at different angles relative to the first side wall longitudinal axis., 'a stacked cavity structure comprising'}2. The sound attenuation apparatus of claim ...

Silencer For Mounting In An Air Duct

A silencer for installation in an air duct, in particular in a flat duct, having at least one sound-absorbing damping element extending essentially in a longitudinal direction (X), and having at least one holding device which accommodates the damping element at least in sections and has a fastening device for fixing the silencer in the air duct. An assembly comprising an air duct and such a silencer is further described.

Modal attenuator of noise reduction in process system (versions) and relevant method

FIELD: electricity. SUBSTANCE: modal attenuator includes a body (12) of the attenuator having the input segment (26) and output segment (28), linked by a connecting segment (30), a perforated screen (32), located inside the body (12) and separated from him, to form the annular space, and lots of rings, located between the screen (32) and body (12). When the fluid flows through the modal attenuator, the sound waves pass through the screen (32) and are reflected back by the set of rings, destroying other sound waves. EFFECT: reducing the fluid noise in the modal attenuator. 16 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 644 426 C2 (51) МПК F16L 55/033 (2006.01) F02M 35/12 (2006.01) F01N 1/02 (2006.01) G10K 11/172 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F16L 55/033 (2017.05); F02M 35/1266 (2017.05); F01N 1/02 (2017.05); G10K 11/172 (2017.05) (21)(22) Заявка: 2015113349, 27.09.2013 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): ФИШЕР КОНТРОЛЗ ИНТЕРНЕШНЕЛ ЛЛС (US) Дата регистрации: 12.02.2018 (56) Список документов, цитированных в отчете о поиске: GB 471431 A , 03.09.1937. EP 28.09.2012 US 61/707,591 (43) Дата публикации заявки: 20.11.2016 Бюл. № 32 1291570 A2, 12.03.2003. US 6116375 A, 12.09.2000. US 23116761 A, 23.02.1943. RU 2110851 C1, 10.05.1998. (45) Опубликовано: 12.02.2018 Бюл. № 5 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 28.04.2015 2 6 4 4 4 2 6 Приоритет(ы): (30) Конвенционный приоритет: R U 27.09.2013 (72) Автор(ы): ФАГЕРЛУН Аллен Карл (US), ГОССЕТТ Джеймс Лерой (US) US 2013/062090 (27.09.2013) C 2 C 2 (86) Заявка PCT: (87) Публикация заявки PCT: R U 2 6 4 4 4 2 6 WO 2014/052701 (03.04.2014) Адрес для переписки: 197101, Санкт-Петербург, а/я 128, "АРСПАТЕНТ", М.В. Хмара (54) МОДАЛЬНЫЙ АТТЕНЮАТОР СНИЖЕНИЯ ШУМА В ТЕХНОЛОГИЧЕСКОЙ СИСТЕМЕ (ВАРИАНТЫ) И СООТВЕТСТВУЮЩИЙ СПОСОБ (57) Реферат: Группа изобретений относится к устройствам внутри ...

一种管路用周期结构阻尼以及处理方法

一种管路用周期结构阻尼以及处理方法，涉及一种船舶管路降噪方法，在管路（1）的外部面间隔环绕阻尼材料A（2）和阻尼材料B（3），其中所述管路（1）外部面间隔环绕的阻尼材料A（2）和阻尼材料B（3）为间隔环状无缝隙粘附在管路（1）的外部面上；或呈螺旋弹簧状无缝隙粘附在管路（1）的外部面上获取管路的周期结构阻尼；本发明通过两种不同的阻尼材料，实现较佳的减振效果，本发明以广泛应用于各种类型船舶管路的减振降噪治理，无需改变原有的施工工艺，只需改变材料规格和施工顺序即可，具有工艺简单、可操作性强的特点。

A kind of fluid-dynamic noise silencer

本发明涉及一种流体动力噪声消声器，包括消声壳体、消声组件和压力调节装置，消声壳体为方形结构，两侧端面上分别设有连接管，连接管外侧端上设有连接法兰；消声组件包括多块弹性波纹板，在消声壳体内上下堆叠组成，相邻的两块弹性波纹板波峰波谷一一对应设置，形成网格端面；压力调节装置包括调节螺栓和压板，压板设于消声壳体内弹性波纹板顶面，调节螺栓穿过消声壳体顶部中心的螺孔，底端与压板相连，顶端高于消声壳体顶部，本发明结构简单，操作方便，可有效减小舰艇管路流体动力噪声，并在较宽的压力和流速变化范围内实现较优的消声效果。

Noise attentuation unit for engine system

本文公开了一种噪声衰减单元，该噪声衰减单元可连接于系统中作为流体流动通路的一部分。这样的单元包括：壳体，该壳体限定了内部空腔，并有第一口和第二口，该第一口和第二口各自可与流体流动通路连接，且通过内部空腔而相互流体连通；以及噪声衰减部件，该噪声衰减部件设置在壳体的内部空腔中，并在第一口和第二口之间流体连通的流动通路内。噪声衰减部件使得在第一口和第二口之间的流体连通能够流过该噪声衰减部件。

Pipe holder

PURPOSE: A pipe support is provided to solve a problem that a seat for fixing a pipe is frequently changed in case of holding a holding instrument or a problem that the holding becomes loose by sliding between the support and the seat. CONSTITUTION: A safety plate functions as a support to be located between a spring and a seat(2). A diameter of an opening in the seat(2) of pipe support is larger than a diameter of a support which inclines by heat expansion movement. Further, the support is surrounded by a sound absorbing material sleeve with elasticity and aligned between the pipe and the seat(2). The sleeve is formed at one side against each support or is separated. A support is arranged preferably between the sleeve and a spring. To support more suitably a sound absorbing sleeve(15) with elasticity, en end nut(5) of a pipe support(4a) is extended to a nut(5a) through the seat(2). A nut(6a) becomes slow with respect to the sleeve(15) from upward. A supportive sleeve(13) and a support plate(14) are disposed intermediate nuts(6,6a) and the sleeve(15) to secure the sleeve against damage when the nut becomes slower.

A kind of super-silent pp drainage pipe

本发明涉及一种超静音pp排水管材，由内表层、外表层和芯层组成，所述的芯层位于内表层和外表层之间，所述的内表层和外表层由聚丙烯材料制成，所述的芯层由聚丙烯、碳酸钙、硫酸钡、玻璃纤维母料制成；本发明的管材采取三层共挤工艺制造，管壁内外层密度差使得管材具有良好的吸声功能，管壁对震动惰性大，可以有效抑制系统震动，解决结构传播噪音。

Noise reduction device and refrigerating device with same

本实用新型提供一种降噪装置，所述降噪装置包括外连接管，所述外连接管包括与毛细管相接的第一端以及与蒸发器相接的第二端，所述外连接管内设有多个间隔排布的多孔丝网，所述多孔丝网的侧边缘抵接于所述外连接管内壁面；从所述第一端至所述第二端，多个所述多孔丝网的孔径依次逐渐变小。通过在外连接管内设置多个孔径逐渐变化的多孔丝网形成连接毛细管和蒸发器的降噪装置，使得于毛细管喷发口处形成的气泡在经过降噪装置时，能够渐变式地由大气泡分散重组形成小气泡，降低了气泡破碎时所发出的噪声，从而起到了降噪的作用。

Separator and muffler including the same

本发明涉及消声器用分离器及消声器，其中，消声器用分离器包括：第一吸声材料；第二吸声材料；穿孔板状部件，插入于第一吸声材料与第二吸声材料之间；以及外框，围绕第一吸声材料、第二吸声材料及穿孔板状部件，其中消声器，包括：保护壳；根据实施例的多个分离器，以预定间隔形成于保护壳内；以及空气通道，形成于多个分离器之间。根据本技术，通过结合多孔质吸声材料与利用由多孔板的振动而产生的共振的吸声材料，从而，可以同时提高在中高频段的吸声效果和在低频段的吸声效果。并且，根据本技术，尤其在125Hz以下的低频段吸声率得以提高，从而，能够显著改善消声器的性能，由此，相较于现有技术，具有将消声器的长度能减小为一半的效果。

Protective sheathing for cables, strands, cable harnesses and the like.

A kind of ventilation end muffler

一种通风末端消音器，用于通风设备的进气端和出气端，其特征是由丝网、扩口端、消声段、支撑筒、整流网、吸声棉、过渡段、连接法兰、底座组成；底座固定在安装平台上，支撑筒安放在底座上；丝网安装在支撑筒风口端外侧；连接法兰安装在过渡段外侧；消声段、扩口端、过渡段连接为一体并安装在支撑筒内，消声段位于扩口端与过渡段之间；扩口端、在消声段、过渡段组成的通道与支撑筒之间填充吸声棉；整流网安装在过渡段内。本发明可以有效解决进风口处气流不均匀、湍流、噪声的问题，还可以减少对周围气体环境形态的影响，还可以延长通风管道设备的使用寿命。

SOUND-ABSORBING PARTITION AND ITS DESIGN

1. Перегородка для шумоглушителя (1) для вентиляционного канала, при этом перегородка (2) имеет прямоугольную форму, если смотреть сбоку в вертикальном разрезе перпендикулярно его продольному направлению, содержит акустический шумопоглощающий материал (10), размещенный в каркасной конструкции (12, 13, 14, 15) для стабилизации формы, и содержит в своем продольном направлении три зоны, представленные: ! передним концевым участком (а) сужающейся формы, содержащей передний край (3) перегородки и выполненной с возможностью встречать и разделять поступающий воздушный поток, ! средним участком (b), имеющим, по существу, форму прямоугольного параллелепипеда и включающим в себя плоскопараллельные основные поверхности (4) для акустического шумопоглощающего материала (10) для поглощения шума от проходящего воздушного потока, и ! задним концевым участком (с) сужающейся формы, содержащей задний край (5) перегородки и выполненной с возможностью регулирования сведения вместе разделенного и звукозаглушенного воздушного потока, ! отличающаяся тем, что каркасная конструкция (12, 13, 14, 15) имеет отверстие для каждой основной поверхности (4) и что задний концевой участок (с) содержит удлинение основных поверхностей (4). ! 2. Перегородка по п.1, отличающаяся тем, что задний концевой участок (с) имеет сужение, по меньшей мере, часть которого является линейной и образует угол падения α с продольным направлением перегородки. ! 3. Перегородка по п.1 или 2, отличающаяся тем, что задний концевой участок (с) имеет в продольном направлении перегородки протяженность w, которая находится в диапазоне 150≤w≤300 мм от заднего края (5) перегородки, наиболее предпочтител� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2010 140 815 (13) A (51) МПК F24F 13/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (71) Заявитель(и): ЛИНДАБ АБ (SE) (21)(22) Заявка: 2010140815/06, 27.02.2009 Приоритет(ы): (30) Конвенционный приоритет: 06.03.2008 SE 0800520-9 (85) Дата начала ...

Underwater muffler

본 발명은 관을 통해 물은 잘 흐르지만, 소리는 차단되도록 하는 해수 소음기에 관한 것으로서, 튜브와, 튜브 내부에 서로 간격을 두고 형성되는 하나 이상의 와셔 모양의 칸막이와, 칸막이 사이에 형성되는 도넛 모양의 소음 부재를 포함하는, 경량 박형 고성능의 해수 소음기에 관한 것이다. The present invention relates to a seawater silencer that allows water to flow well through a tube, but to block sound, and includes a tube, at least one washer-shaped partition formed inside the tube at intervals, and a donut shape formed between the partitions. It relates to a lightweight, thin, high-performance sea water silencer comprising a noise member of.

Air, acoustic and/or fire sealing device

An air, acoustic and/or fire sealing device comprising an air, acoustic and/or fire sealing insert body comprising molded foam material, the body having a first end and a second end and a bulk continuous with the first end and the second end; wherein the body has an outer diameter, and the body is adapted to allow one or more pipes, fibers and/or cables to pass through the first and second ends and the bulk; and, a flexible hollow sleeve having an inner diameter, a first open end and a second open end, the ends being axially arranged; wherein the outer diameter of the air, acoustic and/or fire sealing insert body is greater than, equal to, or less than, the inner diameter of the flexible hollow sleeve; and, the air, acoustic and/or fire sealing insert body is arranged in the sleeve, is disclosed.

A kind of silencing sewer road and preparation method thereof

一种消声下水管道及其制备方法，该下水管道由管道本体，涂覆在管道本体内壁上的消声层，蒸镀在管道本体外壁上的防护层构成。所述消声层由以下重量份的原料配制而成：玻璃纤维20‑25份，聚醚多元醇10‑15份，石墨8‑10份，聚环氧乙烷5‑10份，聚芳酯12‑18份，乙烯基硅橡胶15‑20份。通过在管道本体中添加少量微量元素并控制在一比例范围使得该管道具有足够的强度，在管道内壁上粘接消声层，管道内水体的流动时产生的声响通过消声层屏蔽，减少了对住户的噪声干扰，管道外壁上蒸镀的防护层使得管道外壁不易生锈腐蚀，延长了管道的使用寿命。

DUCTS COMPRISING EXOSKELETON AND SOUND-ABSORBING STRUCTURES AND VEHICLES USING SUCH DUCTS

Described herein are noise attenuating ducts and vehicles using these ducts for environmental control systems. A duct comprises an exoskeleton structure and a sound-absorbing structure, disposed within and conforming to the exoskeleton structure. The exoskeleton structure provides external mechanical support to the sound-absorbing structure thereby helping to maintain the tubular shape of the sound-absorbing structure. This external support does not interfere with the airflow inside the sound-absorbing structure. Furthermore, the external positioning of the exoskeleton structure allows the integration of various support mounting features for the installation of the duct in a vehicle. In some examples, the exoskeleton structure comprises a plurality of enclosed openings to reduce the weight of the exoskeleton structure and provide additional flexibility. Furthermore, additive manufacturing of the exoskeleton structure allows achieving a monolithic structure with various features and characteristics described above.

Marine heat energy conversion device mounted on ship

本发明公开了一种安装于船舶的海洋热能转换装置，属于新能源发电技术领域，本装置包括浮式OTEC发电平台，浮式OTEC发电平台设于驳船上，浮式OTEC发电平台包括闪蒸器和冷凝器，闪蒸器的蒸汽出口端通过管道连接有透平，透平连接有发电机，透平还通过管道与冷凝器连接，闪蒸器连接有表层海水抽进管和表层海水排放管，其中表层海水抽进管连接有泵体，闪蒸器内部抽真空处理，冷凝器连接有深层海水进管和深层海水排放管，其中深层海水进管连接有泵体，本发明解决了传统排水管容易受海洋风浪影响，被生物撕咬等问题，延长排水管的使用寿命，并在获取利益与保护生物安全中达到可靠平衡。

Method of reducing noise generated by pipes and pipe structure

Способ предназначен для ослабления шума, производимого протекающим по трубе паром. Способ включает в себя этапы обеспечения конструкции (10) трубы, которая содержит внутреннюю трубу (12), внутри которой образован внутренний канал (14) потока, который проходит в направлении (16) внутренней трубы (12), и внешнюю трубу (18), которая окружает внутреннюю трубу (12) и проходит по существу параллельно ей, тем самым образуя внешний канал (20) потока между этими двумя трубами (12, 18), который по существу параллелен внутреннему каналу (14) потока, создания потока (22) пара внутри и вдоль внутреннего канала (14) потока, создания потока (28) воды внутри и вдоль внешнего канала (20) потока, причем поток (28) воды адаптирован для ослабления шума, производимого потоком (22) пара, протекающим через внутренний канал (14) потока, и потоковой подачи газа в поток (28) воды, чтобы создать внутри упомянутого потока (28) воды поток газовых пузырьков. Технический результат – снижение уровня шума. 3 н. и 9 з.п. ф-лы, 6 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 606 038 C2 (51) МПК F16L 55/033 (2006.01) F16L 9/19 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ 2014111042, 22.08.2012 (24) Дата начала отсчета срока действия патента: 22.08.2012 (72) Автор(ы): ГЕРЛИНГС Александер Корнелис (NL), СИТСМА Ян (NL) (73) Патентообладатель(и): КОНИНКЛЕЙКЕ ФИЛИПС Н.В. (NL) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: GB 2411711 A, 07.09.2005;DE Приоритет(ы): (30) Конвенционный приоритет: 23.08.2011 US 61/526,385 (45) Опубликовано: 10.01.2017 Бюл. № 1 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 24.03.2014 (86) Заявка PCT: IB 2012/054238 (22.08.2012) (87) Публикация заявки PCT: 2 6 0 6 0 3 8 (43) Дата публикации заявки: 27.09.2015 Бюл. № 27 102004035955 A1, 16.03.2006;RU 2215925 C1, 10.11.2003;RU 2235253 C2, 27.08.2004;RU 2326297 C2, 10.06.2008. R U 08.12.2016 2 6 0 6 0 ...

Sound damper for smoke-exhaust and venting ducts

A sound damper for smoke-exhaust and venting ducts has a housing an sound-damping screens arranged therein. The housing is free from metal and produced as a sandwich structure from mineral fibre boards 4, 5 of high relative density. The screens of the screen assemblies 7 likewise comprise mineral fibre boards 8, 9 of high relative density, which are arranged next to one another in each section and offset by half the pitch with respect to one another section by section in the direction of flow. <IMAGE>

Silencer for pneumatic device

A silencer for a pneumatic device is provided to improve the noise prevention effect by spirally forming a noise absorbing member and maximally extending the entire length of the noise absorbing member. A silencer for a pneumatic device includes an inner tub(11), an outer tub(12), and a noise absorbing member(22). One end of the inner tub is opened and the other end thereof is closed. The inner tub includes a transverse air guide unit connected to a discharge opening of the pneumatic apparatus at the opened or closed end. The outer tub is coaxially disposed on the outer side of the inner tub so that a space connected to the air guide unit is secured between the inner tub and the outer tub. The outer tub includes a discharge opening connected to the space at a position opposite to the air guide unit. The noise absorbing member is provided in the space between the inner tub and the outer tub.

Noise elimination and reduction device and fan

本申请提供一种消声降噪装置及风机，涉及管道消声降噪技术领域。消声降噪装置包括管道和至少两个消声件。消声件设置于管道内，至少两个消声件间隔布置使管道内的气流沿相邻两个消声件之间的通道流经消声件，消声件由至少一个消声板合围得到，消声件中部具有消声腔，消声板具有呈阵列分布的消声孔，消声腔通过消声孔与管道连通。消声孔的内径为0.2～4mm，消声孔的内径与相邻两个消声孔的间距的比为1：2～1：5。当管道内的气流流经消声件时，气流在受到消声件的阻挡后，沿相邻两个消声件之间的通道流经消声件，声波被消声件吸收、降低和抵消后，气流的噪音达到降噪的目的。

Sonic absorption device for an air pipeline of an aircraft, in particular of an air conditioning system of an aircraft

Muffler pipe for the flow of a gas stream.

Environment-friendly silencer

本发明涉及消音器技术领域，特别涉及一种环保消音器，一种环保消音器，包括防护外壳，所述防护外壳的左侧设置有第一堵盖，所述第一堵盖表面中间开设有进音孔，所述防护外壳的右侧设置有第二堵盖，所述第二堵盖表面中间开设有出音孔，所述第二堵盖表面且位于出音孔下方开设有出灰孔，所述防护外壳的内壁设置有吸音海绵，所述防护外壳的内壁底端设置有斜板，所述斜板中间开设有凹槽，所述凹槽内部设置有滑动机构，所述滑动机构上设置有消音装置，所述消音装置包括第一消音芯和第二消音芯，本发明所述的一种环保消音器，方便对第一消音芯和第二消音芯的维修以及灰尘的清理，可以延长环保消音器的使用寿命,操作方便。

Acoustic attenuation duct device for ventilation of an automobile vehicle, includes an opening and an ensemble having foam/fibrous/porous layer, external sheet, in which the periphery edge is fixed continuously and tightly on the duct

The opening (11) comprises a network of micro perforations. The external sheet (22) is formed by coating the textile material. The device comprises breaking noise impedance zone formed by an abrupt increase of the duct (1) and/or the layer (21). Independent claims are also included for: (1) a ventilation shaft of an automobile vehicle; and (2) a method using the above device.

MULTIPHASIC MIXTURE BASED ON GRANULATES OF ELASTOMERS CROSSLINKED IN POLYMERIC MATRIX WITH THERMOPLASTIC TRANSFORMATION

Multilayer insulating complex for inner face of building roof, has several layers assembled by welding lines which alternate with non welding zones in which layers are free, where each line is near to longitudinal edge of complex

The complex has thirteen layers split into two external metal-coated polyester layers that confines a core constituted of six cotton layers between which five aluminized polypropylene layers are intercalated. The layers are assembled between them by welding lines (7) which alternate with non welding zones in which the layers are free between them. Each welding line is formed at proximity of a longitudinal edge of the complex.

Ventilation duct comprising a foam noise attenuator.

GASEOUS FLUID CIRCULATION CONDUIT INTEGRATING ACOUSTICAL ATTENUATION MEANS.

Noise damping sound liner

Damping element connected to a vibrating structure, and damping device including at least one such element

The present invention relates to a damping element 10 connected to a vibrating structure 1 which is monobloc or composed of several rigidly assembled parts, characterised in that it is in the form of a cushion or mat of woven or knitted fibres. It also relates to a damping device including at least one such element. Application to the damping of vibrating structures.

Channel with sound absorbing walls for the passage of gas currents

Conduit for circulation of a gaseous fluid comprising a sound-absorbing coating

L’invention concerne un conduit (100) de circulation d’un fluide gazeux, en particulier d’air, comportant, sur au moins une portion (104) du conduit à proximité d’une ouverture (101) du conduit, une paroi interne (103) en matériau plein dépourvue de toute ouverture latérale, ladite paroi interne étant couverte en tout ou partie par un revêtement (111) absorbant acoustique. L’invention concerne également un procédé (200) de préparation et d’installation d’un revêtement absorbant dans un conduit (100). figure pour l’abrégé : figure 1 The invention relates to a duct (100) for the circulation of a gaseous fluid, in particular air, comprising, on at least a portion (104) of the duct close to an opening (101) of the duct, an internal wall (103) in solid material devoid of any side opening, said internal wall being covered in whole or in part by a coating (111) absorbing sound. Also disclosed is a method (200) for preparing and installing an absorbent liner in a conduit (100). figure for abstract: figure 1

Patent FR2165436A5

A Silencer for Air Compressor

본 발명은 컴프레서용 소음장치(消音裝置)에 관한 것으로, 특히 컴프레서의 작동시에 기체의 유입구 및 배출구로부터 발생되는 시끄러운 소리를 제거하거나 감소시키기 위한 소음장치에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silencer for compressors, and more particularly to a silencer for removing or reducing loud noises generated from the inlet and outlet of gas during operation of the compressor. 본 발명에 의하면, 컴프레서의 작동시에 발생되는 시끄러운 소리로서 컴프레서의 내부로부터 배출구를 통하여 외부로 전달되는 시끄러운 소리나 외부의 공기가 컴프레서의 내부로 유입구를 통하여 급송되면서 발생되게 되는 시끄러운 소리를 포함하여 이들 소음이 발생되는 어느 곳에나 설치하여 사용이 가능하고, 시끄러운 소리의 감쇠효과가 보다 우수하도록 하기 위하여, 시끄러운 소리가 기구적인 구조, 필터 형상의 구조, 그리고 흡음재 등 여러 차례 및 단계에 걸쳐 경유하면서 점차적으로 시끄러운 소리를 다단계로 감쇠시킬 수 있도록 하고, 내부 기체의 통과시에도 저항을 적게 하여 소음의 감쇠라는 기본적인 목적과 함께 경유하게 되는 기체의 통과면에서도 뒤떨어지지 아니하는 균형적인 효과가 유지되도록 한다. According to the present invention, the loud sound generated during the operation of the compressor, including a loud sound that is transmitted from the inside of the compressor to the outside through the outlet or a loud sound generated by the external air is supplied through the inlet into the compressor. It can be installed in any place where these noises are generated, and in order to make the loud sound attenuation effect more excellent, the loud sound passes through several times and stages such as mechanical structure, filter shape structure, and sound absorbing material. It allows progressively attenuating loud sounds in multiple stages, and reduces resistance even when passing through the internal gas to maintain a balanced effect that does not lag behind the gas passing through with the basic purpose of damping noise. . 컴프레서, 소음 Compressor, noise

Patent FR2518714B3

DAMPING DEVICE

GASEOUS FLUID CIRCULATION CONDUIT INTEGRATING ACOUSTICAL ATTENUATION MEANS.

La présente invention a pour objet un conduit de circulation de fluide gazeux intégrant un moyen d'atténuation acoustique. Ce conduit (1) comprend au moins une portion de conduit flexible (2) à paroi (2') ondulée ou plissée attenante à au moins une portion de conduit (3, 3') lisse, rigide et/ou souple, ledit conduit (1) intégrant au moins un moyen (4) d'atténuation d'ondes acoustiques. Conduit (1) caractérisé en ce que les moyens d'atténuation (4) sont intégrés à ladite au moins une portion de conduit (2) et consistent en des ouvertures ménagées dans ladite paroi ondulée ou plissée et formant des passages entre le volume intérieur et le milieu extérieur, lesdites ouvertures (4) étant situées à distance des crêtes internes (6') des ondulations ou plis (5), c'est-à-dire décalées vers l'extérieur par rapport à ces dernières. The present invention relates to a gaseous fluid circulation duct incorporating an acoustic attenuation means. This duct (1) comprises at least one portion of flexible duct (2) with corrugated wall (2 ') corrugated adjacent to at least a portion of duct (3, 3') smooth, rigid and / or flexible, said duct ( 1) integrating at least one means (4) attenuation of acoustic waves. Conduit (1) characterized in that the attenuation means (4) are integrated with said at least one duct portion (2) and consist of openings formed in said corrugated or pleated wall and forming passages between the interior volume and the external medium, said openings (4) being located at a distance from the internal ridges (6 ') of the undulations or folds (5), that is to say shifted outwards with respect to the latter.

DAMPING ELEMENT LINKED TO A VIBRATING STRUCTURE, AND DAMPING DEVICE COMPRISING AT LEAST ONE SUCH ELEMENT

Ventilation duct fittings for acoustic damping - pref. with walls of expanded resin lined with mineral wool

Modular couplings for building ventilation ducts, etc. comprise tubular profiles with walls of expanded thermoplastic material, pref. polyester or polyurethane, lined with a double layer of mineral wool. The profiles are connected by suitable adaptors to standard wall openings or fittings such as ventilation grilles, opt. the terminal or other fittings, i.e. bends or baffles or the grilles, are injection moulded, pref. from polystyrene. Capable of attenuations of about 35-50 dB.

Rotating air flow duct silencer

A device to reduce noise in an air flow duct comprises a section of the air flow duct (3, fig. 1) having a cylindrical chamber (2, fig. 1) and a paddle wheel type impeller (1, fig. 1) rotating around the cylindrical chamber to block sound propagation in the duct by means of sequentially closing the diameter of the duct. The device further comprises at least one quasi-static pressure sensor upstream and at least one downstream of the impeller, a speed sensor for RPM determination of the rotating impeller, and a speed controller device to control the impeller speed. The controller device controls the speed based on sensor input from the quasi-static pressure sensors and the speed sensor. The device can further comprise an active noise control (ANC) system, consisting of a microphone and an ANC controller device to reduce tonal components resulting from known impeller speeds.

Fluid flow

Damper in pneumatic pressure system damps noise caused by pressure discharge flows from pressure side to atmosphere side

The damper (1) in a pneumatic pressure system damps noise caused by pressure discharge flows from a pressure side to an atmosphere side. It comprises a housing (2) enclosing an expansion chamber with a pressure side inlet (6) for the discharge flow (16) and an opposing atmosphere side outlet (8). In the expansion chamber in the icinity of the inlet a damping component is arranged, made of porous material through which flow can occur. Additionally within the expansion chamber, between the damping component and the outlet (8) is an air filter. The damping component is a flat, disk-shaped body of foam, with a peripheral contour corresponding to the inner cross-section of the expansion chamber and is fixed to a disk-shaped fixation component.

Air guiding component comprises tubular resonator, particularly charge air hose for internal combustion engine with turbocharger, where resonator is introduced in air guiding component

Luftführungsbauteil (1) mit einem rohrförmigen Resonator (2), insbesondere ein Ladeluftschlauch für eine Brennkraftmaschine mit einem Abgasturbolader, wobei der Resonator (2) in das Luftführungsbauteil (1) einbringbar ist und zumindest an einem Ende eine radiale Abstützung (3) zum Luftführungsbauteil (1) aufweist, wobei die Abstützung (3) Öffnungen (3') aufweist, so dass ein Luftstrom den Resonator (2) durch- und umströmt und der Resonator (2) an seiner Innen- und/oder Außenoberfläche radial umlaufende Vertiefungen (4) aufweist. Durch die erfindungsgemäße Ausgestaltung wird eine sehr effiziente akustische Dämpfung von Strömungsgeräuschen erzielt.

Silencer for pneumatic device

The present invention provides a silencer, which is coupled to a pneumatic device to reduce noise. The silencer (10) of the present invention has a double pipe structure, which includes an inner casing (11), which is coupled to an outlet of the pneumatic device, and an outer casing (12), which is coaxially provided around the inner casing (11). A space (18) is defined between the inner casing and the outer casing. The space communicates with an air guide hole (15), which is formed in one end of the inner casing. Furthermore, an acoustical absorbent (22) is provided in the space (18). Preferably, the acoustical absorbent has a spiral shape. Thus, compressed air, which has passed through the pneumatic device, passes through the acoustical absorbent of the silencer. At this time, almost all noise is absorbed by the acoustical absorbent.

Sound-absorbent lining for flow conduits - is used in mine ventilation systems and comprises separate layers for respective noise frequencies

VENTING UNIT WITH TRAP

L'invention se rapporte à une unité de ventilation (10) comprenant un caisson (12) avec au moins un orifice de sortie (16 ; 20) adapté à être raccordé à un réseau de ventilation, notamment à un réseau d'insufflation d'air dans un local à ventiler, au moins un ventilateur (22 ; 24), disposé dans le caisson, et au moins un bloc de matériau absorbant acoustique (40), disposé dans le caisson (12), entre le ventilateur (22 ; 24) et l'orifice de sortie (16 ; 20), et formant un conduit aéraulique (42) mettant en communication de fluide la sortie du ventilateur (22 ; 24) et l'orifice de sortie (16 ; 20). La section du conduit aéraulique (42) au niveau de l'orifice de sortie (16 ; 20) est inférieure ou sensiblement égale à la section de l'orifice de sortie (16 ; 20). The invention relates to a ventilation unit (10) comprising a box (12) with at least one outlet orifice (16; 20) adapted to be connected to a ventilation network, in particular to an insufflation network of air in a room to be ventilated, at least one fan (22; 24) disposed in the box, and at least one block of acoustic absorbing material (40) disposed in the box (12) between the fan (22; ) and the outlet (16; 20), and forming an air duct (42) placing fluid in communication the output of the fan (22; 24) and the outlet (16; 20). The section of the air duct (42) at the outlet (16; 20) is less than or substantially equal to the section of the outlet (16; 20).

Dampener for a fluid accelerator such as a pneumatic blower

Disclosed is a dampener that can eliminate or reduce noise from fluid flow, where the fluid has been accelerated by equipment. A typical kind of equipment that may do such a thing is a pneumatic blower, which takes in ambient air and discharges the air at a higher velocity. The discharged fluid may be passed through the dampener, which includes a noise-absorbing spool structure and a reflective head. Noise that is not absorbed by the noise-absorbing spool structure may be reflected back on the direction of the noise-absorbing spool structure The combination of noise absorption with noise reflection can result in the dampener efficiently dampening noise with comparatively little adverse effect on fluid flow.

Patent BR112016013075A2

METHOD FOR REDUCING NOISE PRODUCED BY PIPES AND PIPE DESIGN

1. Способ ослабления шума, производимого трубами, переносящими текучие субстанции, газы, частицы или их комбинации, включающий в себя этапы- обеспечения конструкции (10) трубы, которая содержит внутреннюю трубу (12), внутри которой образован внутренний канал (14) потока, который проходит в "трубном" направлении (16) внутренней трубы (12), и внешнюю трубу (18), которая окружает внутреннюю трубу (12) и проходит по существу параллельно ей, тем самым образуя внешний канал (20) потока между этими двумя трубами (12, 18), который по существу параллелен внутреннему каналу (14) потока;- создания потока (22) пара внутри и вдоль внутреннего канала (14) потока,- создания потока (28) воды внутри и вдоль внешнего канала (20) потока, причем, поток (28) воды адаптирован для ослабления шума, производимого потоком (22) пара, протекающим через внутренний канал (14) потока, и- потоковой подачи газа в поток (28) воды, чтобы создать внутри потока (28) воды поток газовых пузырьков (34).2. Способ по п. 1, в котором газ непрерывно вводят в поток (28) воды непрерывной потоковой подачей для создания потока газовых пузырьков (34), которые равномерно распределены внутри потока (28) воды.3. Способ по п. 1, дополнительно включающий в себя этап извлечения по крайней мере части газа из внешнего канала (20) потока для предотвращения нарастания давления или исключения водяного слоя.4. Способ по п. 1, дополнительно включающий в себя этап размещения внутренней трубы (12) коаксиально с внешней трубой (18).5. Способ по п. 1, дополнительно включающий в себя этап установки между двумя трубами (12, 18) виброизолированного соединения с использованием виброизолированной опоры.6. Способ по п. 1, в котором объем потока (28) в� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК F16L 9/18 (11) (13) 2014 111 042 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2014111042/06, 22.08.2012 (71) Заявитель(и): КОНИНКЛЕЙКЕ ФИЛИПС Н.В. (NL) Приоритет(ы): (30) ...

Sound-insulating extruded, injection - or blow molded pipes or moldings for domestic installations have foam layer and compact layer, dimensions of pores being controlled and number of pores and size having gradient towards compact layer

Die Erfindung betrifft ein schalldämmendes extrudiertes oder spritzgeformtes oder blasgeformtes kompaktes, mehrschichtiges Hausinstallationsrohr oder Hausinstallationsformteil.

Silencing pipeline

本发明涉及管路系统消声隔振技术领域，公开了一种消声管路，包括外层的波纹管和内层的导流筒，导流筒为多孔柔性管，导流筒的内壁围成的圆形通道为管路流道，导流筒的外壁与波纹管的内侧面形成消声腔。本发明提供的消声管路，在波纹管内套设导流筒，形成套管结构，导流筒的外壁与波纹管的内侧面形成消声腔，流动工质能够从导流筒的孔壁多孔孔隙进入消声腔，并形成管路流道与消声腔的流体介质交换；导流筒的多孔壁面能够对流动工质产生多孔消声效应，消声腔能够对流动工质产生扩张室容积阻抗效应；从而对管路内部流体介质的压力脉动和流噪声进行吸收、衰减，发挥吸声和消声作用，减弱管路内部通过流体介质的噪声传递。

A kind of constructional engineering drain and HVAC air-flow silencing apparatus

本发明公开了一种建筑工程排水与暖通气流消声装置，包括内管，所述内管的内壁固定有螺旋导流叶片，内管的外侧面套接有隔音管，隔音管的外侧面套接有外管，内管的内壁和固定板的左右两端固定连接，固定板的上表面和缓冲装置的下端固定连接，缓冲装置的上端通过支撑杆和锥形橡胶块下端的中心位置固定连接，缓冲装置包括防水伸缩杆，防水伸缩杆的下端和固定板的上表面固定连接，防水伸缩杆的上端固定有固定块，水流沿着螺旋导流叶片流动，可以降低水流流动时的噪声；落到锥形橡胶块上的水流重新流到螺旋导流叶片上，锥形橡胶块使得缓冲装置收缩，锥形橡胶块向下移动，从而降低锥形橡胶块受到的冲击力，从而提高锥形橡胶块的使用寿命。

Sound attenuator for low frequencies, in particular for air ducts in paper mills

The invention concerns a sound attenuator for low frequencies for air-conditioning ducts, in particular for intake-air and/or exhaust-air ducts in paper mills. The sound attenuator comprises a frame whose flow duct substantially coincides with the air-conditioning duct and in which frame there is at least one plane attenuator member parallel to the flow direction and comprising one or several attenuator units operating by the Helmholtz and/or plate resonator principle. The attenuator member or members are fitted in the frame singly or as a group of several attenuator members to be replaced for cleaning and/or servicing of the sound attenuator and/or of the attenuator members.

Cellular glass corrosion under insulation system

Sound absorbing panel for lining a duct

Silencer

A silencer is described for damping the outflow noise of compressed air from compressed air appliances, in particular compressed air appliances of vehicles, with an inlet port, with at least one outlet port and with a pot-like housing which is arranged between these ports and which has a pot casing and a pot bottom, a sound-absorbing material in the form of a cartridge of a filter knit, serving for noise damping, being arranged in the inner space of the pot-like housing, characterized in that a layer of fibrous material is arranged between the cartridge and the pot casing.

Sound-damped, gas-conducting component

Sound attenuation systems and methods

Methods and devices for increasing the sound attenuation properties of a noise suppression device are provided. In some embodiments, a sound attenuating conduit has an improved shape that provides increased sound attenuation properties. In other embodiments, the sound attenuating conduits are stacked together, and shaped to increase the air flow cross-section. Still other embodiments provide machinery that includes the improved sound attenuating conduits.

Mounting bracket for strain sensor

Pipe walls and rainwater guide pipe with outer wall eliminating noise and inner wall conducting buffering

本发明的一种管壁和外壁消音、内壁缓冲的雨水导流管，双层管壁之间被分割为多个密闭小空间，可以初步的阻隔雨水冲刷管壁时产生的噪音，另外，还将小空间内填充有吸能球，当声音传递到小空间内时，吸收声波震动的能量，进一步消除噪音；内管壁的内侧上沿径向设有犬牙式互相交错的凸起，当雨水冲刷下来后，雨水顺着交错的凸起形成的回旋形路径流淌，降低雨水冲刷速度和撞击管壁的声音，起到消除噪音作用。随着水流流速的降低，凸起的高度也随之变小，在保证降低噪音的前提下，也同时防止水流过大时，雨水从导流管上端溢出。凸起的上表面上设有波浪形凸起、外管壁外侧包覆有消音棉，可进一步消除噪音。

Toilet pipeline sound partiting system

本发明公开一种卫生间管道隔声系统，由管道隔声结构、主下水管隔声结构、隔声吊顶组成。所述的管道隔声结构由柔性吸声材料、隔声毡、扎带、喉箍组成，将柔性吸声材料使用扎带固定包扎在水管外；隔声毡使用喉箍将隔声毡密实地固定包扎在柔性吸声材料外；所述的主下水管隔声结构系在包扎好的主下水管外，使用钢结构框架安装防水阻尼隔声板封闭，使用益胶泥将瓷砖贴在防水阻尼隔声板外；所述的隔声吊顶系在管道下使用使用镀锌方管框架安装防水阻尼隔声板，镀锌方管框架与楼板之间采用减振吊杆固定，管道与顶棚楼板之间的空间放置吸声材料。

Treatment equipment for leakage noise of gas conveying pipeline

本发明公开了一种气体输送管道泄漏噪音的治理设备，属于管道噪音治理领域。一种气体输送管道泄漏噪音的治理设备，噪音治理设备包括设置在管道两侧的上组合体和下组合体、对称安装在上组合体和下组合体两侧的安装密封板、设置在上组合体远离管道一侧的消音装置、设置在上组合体内部的封堵装置、第一排气管、组合消音管、组合式密封块以及能够分别在上组合体和下组合体内滑动的按压橡胶块；上组合体和下组合体之间为固定连接，本发明通过按压橡胶块对管道泄漏处进行挤压密封，降低单位时间内的气体喷射量，减少了气体损耗，同时降低了气体泄露产生的噪音。

DEVICE FOR ATTENUATING NOISE GENERATED BY A HEATING / VENTILATION SYSTEM OF A MOTOR VEHICLE

NOISE REDUCING DEVICE FOR A VENTILATION LINE CROSSED BY A GASEOUS FLOW

Dispositif réducteur de bruit (100) pour équiper l'extrémité d'une conduite (5) traversée par un flux gazeux comprenant un déflecteur (2, 3, 4) coupant l'axe (xx) du flux à l'extrémité de la conduite (5). Le déflecteur est formé de cavités de résonateur (31). Ces cavités sont couvertes par une couche de mousse absorbante (4) et les cols (34) des cavités (31) traversent la couche de mousse absorbante (4). Noise reduction device (100) for fitting the end of a pipe (5) crossed by a gas flow comprising a deflector (2, 3, 4) intersecting the axis (xx) of the flow at the end of the pipe (5). The deflector is formed by resonator cavities (31). These cavities are covered by a layer of absorbent foam (4) and the necks (34) of the cavities (31) pass through the layer of absorbent foam (4).

Sound attenuating sleeve for use on a piling

Disclosed are a sound attenuation sleeve for use on a piling during underwater construction and a method of using such a sleeve for attenuating underwater transmission of sound and/or shock waves during underwater pile driving operations.

Noise muffler

Изобретение относится к глушителю шума, предназначенному для снижения шумов при выходе сжатого воздуха из аппаратов пневматической системы, в частности аппаратов пневматической системы автомобилей. Сущность изобретения: глушитель шума, предназначенный для снижения шумов при выходе сжатого воздуха из аппаратов пневматической системы, в частности аппаратов пневматической системы автомобилей, с впускным отверстием и, по меньшей мере, с одним выпускным отверстием, а также с расположенным между этими отверстиями чашеобразным корпусом, имеющим боковую поверхность чаши и днище чаши, причем во внутреннем пространстве чашеобразного корпуса установлен предназначенный для изоляции шумов звукопоглощающий материал в виде патрона фильтрующего трикотажного полотна, причем между патроном (7) и боковой поверхностью (2) чаши расположен слой из волокнистого материала (8), а преобладающая часть волокон волокнистого материала (8) расположена с наклоном к боковой поверхности (2) чаши. Техническим результатом изобретения является улучшение звукоизоляционных свойств. 8 з.п. ф-лы, 2 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 484 267 (13) C2 (51) МПК F01N 3/022 (2006.01) B60T 17/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ Приоритет(ы): (30) Конвенционный приоритет: 09.05.2007 DE 202007006627.9 (73) Патентообладатель(и): КНОРР-БРЕМЗЕ ЗЮСТЕМЕ ФЮР НУТЦФАРЦОЙГЕ ГМБХ (DE) (43) Дата публикации заявки: 20.06.2011 Бюл. № 17 2 4 8 4 2 6 7 (45) Опубликовано: 10.06.2013 Бюл. № 16 (56) Список документов, цитированных в отчете о поиске: DE 19701361 C1, 23.07.1998. GB 351565 A, 29.06.1931. DE 4306397 A1, 16.09.1993. EP 0537483 A, 21.04.1993. DE 10341668 A1, 26.08.2004. 2 4 8 4 2 6 7 R U (86) Заявка PCT: EP 2008/003364 (25.04.2008) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.12.2009 (87) Публикация заявки РСТ: WO 2008/138465 (20.11.2008) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", пат.пов. Ю.В. ...