GB1499424A - Device for noise damping of fans - Google Patents

Device for noise damping of fans

Info

Publication number
GB1499424A
GB1499424A GB2233875A GB2233875A GB1499424A GB 1499424 A GB1499424 A GB 1499424A GB 2233875 A GB2233875 A GB 2233875A GB 2233875 A GB2233875 A GB 2233875A GB 1499424 A GB1499424 A GB 1499424A
Authority
GB
United Kingdom
Prior art keywords
duct
fan
tangential
modification
curved
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2233875A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tatra np
Original Assignee
Tatra np
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 Tatra np filed Critical Tatra np
Publication of GB1499424A publication Critical patent/GB1499424A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • F02B77/13—Acoustic insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/424—Double entry casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

1499424 Fan intake silencers TATRA NARODNI PODNIK 22 May 1975 [12 July 1974] 22338/75 Heading FIB The intake duct 1 of a cooling fan 4 for an I.C. engine has a lining 9 of sound absorbing material and is curved so that a line joining the edge 7 of the mouth of the duct to a point 6 on the periphery of the fan housing, is tangential to the inner surface 5 of the opposite wall of the duct. In a first modification, Fig. 2 the duct is bifurcated and each branch is curved. In a second modification, Fig. 3 (not shown), guide vanes (19, 20, 21, 22) are provided in the duct and extend from wall to wall. The leading and trailing edges of adjacent vanes are tangential to lines drawn from a point on the periphery of the housing and passing out through the mouth of the duct. In a third modification, Fig. 5 (not shown) the duct is barrel-shaped as seen in one plane including the axis of the fan and includes curved plates (39, 40, 42, 43) lined with soundabsorbing material and a central member (41). Lines joining the upstream and downstream edges of the curved plates are tangential to the surface of the adjacent member.
GB2233875A 1974-07-12 1975-05-22 Device for noise damping of fans Expired GB1499424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS497174A CS187570B1 (en) 1974-07-12 1974-07-12 Device for the sound deadening from the ventilator,notebly for air cooled motors

Publications (1)

Publication Number Publication Date
GB1499424A true GB1499424A (en) 1978-02-01

Family

ID=5393631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2233875A Expired GB1499424A (en) 1974-07-12 1975-05-22 Device for noise damping of fans

Country Status (5)

Country Link
CS (1) CS187570B1 (en)
DE (1) DE2529766B2 (en)
GB (1) GB1499424A (en)
SE (1) SE412090B (en)
SU (1) SU1004661A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465105A1 (en) * 1979-09-11 1981-03-20 Gauting Gmbh Apparatebau SOUND INSULATION DEVICE FOR BLOWERS, FANS OR TURBOMACHINES OF THE SAME TYPE

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335797A (en) * 1979-10-10 1982-06-22 Caterpillar Tractor Co. Noise suppression arrangement for engine enclosures
AT378576B (en) * 1980-04-18 1985-08-26 List Hans SOUND-INSULATED ENCLOSED ENGINE
DE8535868U1 (en) * 1985-12-20 1986-02-06 F.W. Carduck GmbH, 5100 Aachen Arch-shaped absorption silencer for the arrangement on the suction side of fans with high pressure and sound power
BE1011631A3 (en) * 1997-12-19 1999-11-09 Atlas Copco Airpower Nv Fan with silencer and the silencer used for this
DE102016101662A1 (en) * 2016-01-29 2017-08-03 Schwäbische Hüttenwerke Automotive GmbH flow line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465105A1 (en) * 1979-09-11 1981-03-20 Gauting Gmbh Apparatebau SOUND INSULATION DEVICE FOR BLOWERS, FANS OR TURBOMACHINES OF THE SAME TYPE

Also Published As

Publication number Publication date
SE7508006L (en) 1976-04-02
SE412090B (en) 1980-02-18
DE2529766B2 (en) 1980-12-18
SU1004661A1 (en) 1983-03-15
CS187570B1 (en) 1979-02-28
DE2529766A1 (en) 1976-01-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee