WO2018188762A1 - Système amortisseur de bruit à coulisse muni de faces frontales absorbant le bruit - Google Patents

Système amortisseur de bruit à coulisse muni de faces frontales absorbant le bruit Download PDF

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Publication number
WO2018188762A1
WO2018188762A1 PCT/EP2017/059054 EP2017059054W WO2018188762A1 WO 2018188762 A1 WO2018188762 A1 WO 2018188762A1 EP 2017059054 W EP2017059054 W EP 2017059054W WO 2018188762 A1 WO2018188762 A1 WO 2018188762A1
Authority
WO
WIPO (PCT)
Prior art keywords
absorber
silencer
sound
housing
slotted
Prior art date
Application number
PCT/EP2017/059054
Other languages
German (de)
English (en)
Inventor
Wolfgang Herget
Peter BRANDSTÄTT
Thomas Fuchs
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
Siegle + Epple GmbH & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V., Siegle + Epple GmbH & Co. KG filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
Priority to PCT/EP2017/059054 priority Critical patent/WO2018188762A1/fr
Priority to EP17718509.7A priority patent/EP3610205A1/fr
Priority to CN201780089611.XA priority patent/CN110770511A/zh
Publication of WO2018188762A1 publication Critical patent/WO2018188762A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F24F2013/205—Mounting a ventilator fan therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F24F2013/242—Sound-absorbing material

Definitions

  • the invention relates to a silencer arrangement according to the preamble of claim 1.
  • housing or piping systems can serve several purposes, such as the protection of the equipment from external impact, the shielding of persons and the environment from hazards by the devices, the transport of media, if the housing is also part of a delivery line, or the limitation of the acoustic emission of the devices in the environment.
  • the inflow profile can be acoustically transparent and surround a space that is filled with acoustically damping material.
  • the present invention serves to effectively reduce the sound radiation of a noise source built into a housing or piping system into the environment in a selected acoustic frequency range. It is assumed that the noise source built into the housing is connected to the environment via a piping system and this piping system is used for the transport of media. The radiation of sound energy to the environment is then on the one hand directly as sound transmission through the housing walls and on the other hand as sound propagation along the line system to the outside. The radiated sound energy is dependent on the sound power of the sound source, the acoustic absorption property of the housing inner surfaces, the Dämmgüte the housing walls, the structure-borne sound of the pipe system and the sound-absorbing effect of the pipe system.
  • the measures to reduce the noise emission into the environment therefore set at the following points:
  • the reduction of the source noise level the reduction of the noise level within the housing by increasing the absorption of space on the housing inner surfaces or by absorption measures within the housing volume
  • microperforated absorbers as freely positioned planar elements or of microperforated absorbers with a tuned downstream airspace with or without damping.
  • the object of the invention is to provide a muffler assembly according to the preamble of claim 1, which advantageously combines the effect of the acoustic sound absorption within the housing with the action of a slotted silencer.
  • microperforated walls can be advantageously arranged in different ways.
  • a silencer arrangement is provided with a housing of arbitrary wall structure which contains a sound source, and a duct system for conveying a medium, and a slotted silencer which is installed in the duct system and which has a series of parallel slotted silencer casings, air gaps being arranged between the slotted silencer casings, through which the medium can flow.
  • This silencer arrangement is characterized in that a sound absorber, in particular a microperforated absorber, is placed on the end faces of the slotted silencer housings facing the sound source, or a sound absorber, in particular a microperforated absorber, is inserted between adjacent slotted silencer housing parts in the flow direction. This reduces the sound level in the area of the housing in which the sound source is located. This aspect is commonly attributed no importance, since only care is taken that in the flowing medium, as it were mitströmender sound is attenuated. By a silencer on the front sides, also upstream sides, of course, this flowing sound is attenuated in the medium, but this effect is subordinate.
  • the invention basically works with any sound absorber.
  • the invention works particularly well from a current point of view but with a microperforated absorber. In this respect, the focus is always on a micro-perforated absorber.
  • the microperforation and the width and the depth of the absorber are chosen such that an absorption in a desired frequency Spectrum takes place. It is clear that there is no complete absorption and the frequency range can not be set arbitrarily accurate. However, it is possible to design the absorber independently of the sound source and of the desired attenuation.
  • the absorber has a microperforated wall oriented to the sound source. In this way, a classic micro-perforated absorber is formed, which reduces the amount of sound in the cavity of the housing, ie in the region of the housing in which the sound source is located.
  • the absorber has a microperforated wall oriented in the direction of the air gaps.
  • the sound content in the flowing medium can be damped.
  • the absorber has two or more microperforated walls oriented in two or more directions. This can be achieved in different directions attenuation.
  • the absorber has a curved microperforated wall oriented to the sound source.
  • a curved wall offers the particular advantage that a round, flow dynamic favorable inflow is formed.
  • the curvature causes a broadband effect of the tuned resonator, since the curvature no uniform depth of the absorber volume is present.
  • the absorber is subdivided in the direction of its largest dimension by one or more separating elements into sub-volumes. This may be advantageous from the acoustic effect, since the absorbing effect increases in the desired frequency range. Furthermore, this can offer design advantages.
  • the absorber has an additional rear wall. While in many embodiments as a rear wall the - missing the absorber - the sound source facing wall is used as a rear wall, also an additional rear wall can be used. This achieves independence from the already existing wall.
  • the absorber interposed between adjacent slotted damper housing parts has one or two microperforated walls oriented toward the air gap (s).
  • the effect of the slotted silencer can be strengthened.
  • the invention also relates to a slotted silencer for use in a silencer arrangement described above, wherein on the upstream side of the slotted silencer a hollow body with microperforations can be placed or placed.
  • 1 is a silencer assembly of a housing, a conduit for a flowing medium and a built-in to the housing in the line path backdrop silencer with patch micro-perforated absorbers
  • 2 shows an exploded view of a part of a silencer arrangement with a part of a slotted silencer, a microperforated absorber housing and an absorber rear wall
  • FIG. 3a shows a side view of a Kulissendämpferteils with attached absorber, the perforation surface is oriented to the sound source
  • 3b is a side view of a Kulissendämpferteils with attached absorber, the perforation surface is oriented in the direction of the muffler gap,
  • 3c is a side view of a Kulissendämpferteils with attached absorber whose two perforation surfaces are oriented twice in the direction of the silencer column,
  • 3d shows a side view of a Kulissendämpferteils with attached absorber whose three perforation surfaces are oriented in three different directions
  • 3e is a side view of a Kulissendämpferteils with attached absorber, the perforation surface is curved,
  • Fig. 3f is a side view of a Kulissendämpferteils, which is divided into two sections, between which an absorber is inserted, the two perforation faces are oriented in the direction of the muffler.
  • Fig. 1 shows the overall system of the muffler assembly, comprising a box-shaped housing 1 with an enclosed space 2, with a arranged on the right side of the housing wall opening 3, to which a portion of a conduction path may adjoin, and arranged on the left side of the housing wall openings 4 of the conduction path includes.
  • the muffler assembly further comprises arranged on the left housing inner wall slotted silencer 5 in absorber, resonator or mixed construction and on housing 6 of the slotted silencer 5 patch micro-perforated absorber 7.
  • the latter each have a perforated front wall 9 and may have a rear wall 8. Between the slotted silencers 5 are air gaps 10.
  • a noise source 1 1 is placed centrally with or without conveying function.
  • a silencer assembly with a housing 1 any wall structure containing a sound source 1 1. It is connected to a line system 3, 4 for conveying a medium into the environment. It has a pipe or slotted silencer which is installed in the vicinity of the housing 1 in the conduit system 3, 4 and which has a series concentric or parallel pipe or bushing damper housing 6 with air gaps 10 between the pipe or slotted silencer housings 6. On the sound source 1 1 facing end faces of the pipe or slotted silencer housing 6 micro-perforated absorber 7 are placed or it is inserted between pipe or slotted silencer housing parts 5.1, 5.2 a micro-perforated absorber 7.6.
  • the sound radiation of the noise source 1 1 in the conduction path is lowered through the perforated front walls 9 of the absorber 7 in a defined acoustic frequency range.
  • the absorption frequency can be tuned specifically to disturbing frequencies in the source spectrum, so that a tailor-made sound reduction can be achieved within the housing 1.
  • the level-lowering effect is not constant; the highest level-lowering effect occurs in the vicinity of the absorber.
  • the positioning of the absorber 7 on the front side of the silencer scenes 5 has the advantage that the highest absorption effect takes place directly at the entrance of the slotted silencer 5. As a result, the effectiveness of the level reduction is optimized along the running over the wall openings 4 line path.
  • Fig. 2 shows the structure of the noise damping arrangement, which consists of a part of a slotted silencer 5 with a housing 6 and an absorber 7, which has a housing with a microperforated front wall 9.
  • the absorber housing can be provided with an absorber rear wall 8.
  • the absorber housing can furthermore be subdivided with one or more separating elements 12.
  • the absorber 7 is placed and fixed on the housing 6.
  • Fig. 3 shows various embodiments of mounted on backdrop silencers 5 absorbers.
  • the absorbers have different orientations of the microperforated walls pointing in different directions or different basic shapes.
  • FIG. 3a shows a possible embodiment in which a microperforated wall 9.1 of an absorber 7.1 points in the direction of the sound source 11.
  • FIG. 3 b shows a possible embodiment in which a microperforated wall 9. 2 of an absorber 7. 2 points in the direction of the air gaps 10.
  • FIG. 3 c shows a possible embodiment in which two microperforated walls 9. 2, 9. 3 of an absorber 7. 3 point in the direction of the air gaps 10.
  • 3d shows a possible embodiment in which three microperforated walls 9.2, 9.3, 9.4 of an absorber 7.4 are oriented in three different directions.
  • 3e shows a possible embodiment in which a microperforated wall 9.5 of an absorber 7.5 is curved.
  • 3f shows a possible embodiment in which the slotted silencer is subdivided into two parts 5.1, 5.2 and an absorber 7.5 is inserted between these parts, wherein two microperforated walls 9.2, 9.3 of the absorber 7.5 are oriented in the direction of the air gaps 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne un système amortisseur de bruit comportant un boîtier (1) présentant une quelconque structure de paroi et contenant une source de bruit (11), un système de conduites (3, 4) servant à acheminer un fluide dans l'environnement, et un amortisseur de bruit à coulisse qui est incorporé dans le système de conduites (3, 4) et présente une série de boîtiers (6) d'amortisseur de bruit à coulisse parallèles, des entrefers (10) pouvant être traversés par le fluide étant agencés entre les boîtiers (6) d'amortisseur de bruit à coulisse. Le système amortisseur de bruit est caractérisé en ce qu'un absorbeur de bruit, en particulier un absorbeur à micro-perforations (7), est installé sur les faces frontales, tournées vers la source de bruit (11), du boîtier (6) d'amortisseur de bruit à coulisse ou en ce qu'un absorbeur à micro-perforations (7.6) est inséré entre des parties (5.1, 5.2) de boîtier d'amortisseur de bruit à coulisse adjacentes dans le sens de l'écoulement.
PCT/EP2017/059054 2017-04-14 2017-04-14 Système amortisseur de bruit à coulisse muni de faces frontales absorbant le bruit WO2018188762A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/EP2017/059054 WO2018188762A1 (fr) 2017-04-14 2017-04-14 Système amortisseur de bruit à coulisse muni de faces frontales absorbant le bruit
EP17718509.7A EP3610205A1 (fr) 2017-04-14 2017-04-14 Système amortisseur de bruit à coulisse muni de faces frontales absorbant le bruit
CN201780089611.XA CN110770511A (zh) 2017-04-14 2017-04-14 具有吸声式端侧的分流***组件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/059054 WO2018188762A1 (fr) 2017-04-14 2017-04-14 Système amortisseur de bruit à coulisse muni de faces frontales absorbant le bruit

Publications (1)

Publication Number Publication Date
WO2018188762A1 true WO2018188762A1 (fr) 2018-10-18

Family

ID=58579157

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/059054 WO2018188762A1 (fr) 2017-04-14 2017-04-14 Système amortisseur de bruit à coulisse muni de faces frontales absorbant le bruit

Country Status (3)

Country Link
EP (1) EP3610205A1 (fr)
CN (1) CN110770511A (fr)
WO (1) WO2018188762A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2609278A (en) * 2021-07-22 2023-02-01 Lenovo Beijing Ltd Sound absorption device, heat dissipation device and server chassis

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916101A (en) 1957-02-25 1959-12-08 Israel A Naman Sound-absorbing structures
DE3103231A1 (de) * 1981-01-30 1982-08-12 Müller - BBM GmbH, 8033 Planegg Vorrichtung zur schalldaempfung
EP0039727B1 (fr) * 1979-11-07 1985-05-22 Industrial Acoustics Company, Inc. Amortisseur de bruit a filtre acoustique
DE3707650C1 (en) 1987-03-10 1988-06-09 Fraunhofer Ges Forschung Sound absorber for scenery
US5473124A (en) 1994-01-31 1995-12-05 Dipti Datta Packless silencer
DE29710491U1 (de) 1997-02-14 1998-03-12 Westa-Holding GmbH & Co. KG, 33334 Gütersloh Schalldämpfer
WO2009110843A1 (fr) 2008-03-06 2009-09-11 Lindab Ab Déflecteur absorbant les sons et agencement pour un déflecteur

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SE450656B (sv) * 1982-05-14 1987-07-13 Bahco Ventilation Ab Ljuddempare for ventilationskanaler eller ventilationsapparater
DE3425450A1 (de) * 1983-09-22 1985-04-04 Rox Lufttechnische Gerätebau GmbH, 5000 Köln Geraeteschalldaempfer
CN86204649U (zh) * 1986-09-16 1987-09-12 上海柴油机厂 节流***
CN2192001Y (zh) * 1994-06-27 1995-03-15 袁明志 微小孔板复合消声弯头
CN2444295Y (zh) * 2000-09-20 2001-08-22 上海博旭复合装饰材料有限公司 一种组合式吸隔声板
KR100555375B1 (ko) * 2004-04-30 2006-03-03 이영섭 공명형 덕트 소음기
CN200943897Y (zh) * 2006-08-01 2007-09-05 合肥普贤机电科技有限公司 油烟净化装置
CN202117739U (zh) * 2011-06-30 2012-01-18 东莞市力宇燃气动力有限公司 一种阻抗复合式排气消音器
CN205970735U (zh) * 2016-08-30 2017-02-22 平湖爱驰威汽车零部件有限公司 一种新型多板折叠式汽车空调***专用消音器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916101A (en) 1957-02-25 1959-12-08 Israel A Naman Sound-absorbing structures
EP0039727B1 (fr) * 1979-11-07 1985-05-22 Industrial Acoustics Company, Inc. Amortisseur de bruit a filtre acoustique
DE3103231A1 (de) * 1981-01-30 1982-08-12 Müller - BBM GmbH, 8033 Planegg Vorrichtung zur schalldaempfung
DE3707650C1 (en) 1987-03-10 1988-06-09 Fraunhofer Ges Forschung Sound absorber for scenery
US5473124A (en) 1994-01-31 1995-12-05 Dipti Datta Packless silencer
DE29710491U1 (de) 1997-02-14 1998-03-12 Westa-Holding GmbH & Co. KG, 33334 Gütersloh Schalldämpfer
WO2009110843A1 (fr) 2008-03-06 2009-09-11 Lindab Ab Déflecteur absorbant les sons et agencement pour un déflecteur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2609278A (en) * 2021-07-22 2023-02-01 Lenovo Beijing Ltd Sound absorption device, heat dissipation device and server chassis
GB2609278B (en) * 2021-07-22 2024-04-10 Lenovo Beijing Ltd Sound absorption device, heat dissipation device and server chassis

Also Published As

Publication number Publication date
EP3610205A1 (fr) 2020-02-19
CN110770511A (zh) 2020-02-07

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