FR2457399A1 - Silencer for axial suction fan with radial feed pipe - has exponentially decreasing cross=section and is inclined to perpendicular to shaft to impart spiral trajectory on intake air - Google Patents

Silencer for axial suction fan with radial feed pipe - has exponentially decreasing cross=section and is inclined to perpendicular to shaft to impart spiral trajectory on intake air

Info

Publication number
FR2457399A1
FR2457399A1 FR7913069A FR7913069A FR2457399A1 FR 2457399 A1 FR2457399 A1 FR 2457399A1 FR 7913069 A FR7913069 A FR 7913069A FR 7913069 A FR7913069 A FR 7913069A FR 2457399 A1 FR2457399 A1 FR 2457399A1
Authority
FR
France
Prior art keywords
silencer
shaft
section
spiral trajectory
intake air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7913069A
Other languages
French (fr)
Other versions
FR2457399B1 (en
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.)
Automobiles Citroen SA
Original Assignee
Automobiles Citroen SA
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 Automobiles Citroen SA filed Critical Automobiles Citroen SA
Priority to FR7913069A priority Critical patent/FR2457399A1/en
Publication of FR2457399A1 publication Critical patent/FR2457399A1/en
Application granted granted Critical
Publication of FR2457399B1 publication Critical patent/FR2457399B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports

Abstract

The silencer for a fan with axial input and radial output lessens sound made by the rotor across the intake. It is in the form of a pipe which gives the intake flow a spiral trajectory in a perpendicular plan. The current is directed after being turned spirally. The pipe section, perpendicular to flow, is an exponential function, decreasing with distance from the silencer entry. The pipe is made of flat pieces fitted to give a nearly exponential change. The fan input is inclined relative to the perpendicular plan to the shaft.
FR7913069A 1979-05-23 1979-05-23 Silencer for axial suction fan with radial feed pipe - has exponentially decreasing cross=section and is inclined to perpendicular to shaft to impart spiral trajectory on intake air Granted FR2457399A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7913069A FR2457399A1 (en) 1979-05-23 1979-05-23 Silencer for axial suction fan with radial feed pipe - has exponentially decreasing cross=section and is inclined to perpendicular to shaft to impart spiral trajectory on intake air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7913069A FR2457399A1 (en) 1979-05-23 1979-05-23 Silencer for axial suction fan with radial feed pipe - has exponentially decreasing cross=section and is inclined to perpendicular to shaft to impart spiral trajectory on intake air

Publications (2)

Publication Number Publication Date
FR2457399A1 true FR2457399A1 (en) 1980-12-19
FR2457399B1 FR2457399B1 (en) 1983-10-21

Family

ID=9225752

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7913069A Granted FR2457399A1 (en) 1979-05-23 1979-05-23 Silencer for axial suction fan with radial feed pipe - has exponentially decreasing cross=section and is inclined to perpendicular to shaft to impart spiral trajectory on intake air

Country Status (1)

Country Link
FR (1) FR2457399A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126221A2 (en) * 1983-03-02 1984-11-28 Hans Dr. Viessmann Forced-draught burner for heating-boiler doors
DE19934586A1 (en) * 1999-07-23 2001-01-25 Behr Gmbh & Co fan

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB408325A (en) * 1932-10-08 1934-04-09 Robert Ernest Workman Improvements in or relating to rotary fans
US2267275A (en) * 1939-11-25 1941-12-23 Gen Machine Company Inc Fan muffler
US3120876A (en) * 1961-05-03 1964-02-11 Edward F Lirette Air intake silencer
US3540547A (en) * 1968-12-31 1970-11-17 Charles Waddell Coward Jr Acoustical systems for air moving devices
US3748997A (en) * 1972-04-06 1973-07-31 Tempmaster Corp Acoustical insulated fan and temperature conditioning penthouse unit
GB1529946A (en) * 1976-03-03 1978-10-25 Fans & Blowers Ltd Silencers for centrifugal blowers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB408325A (en) * 1932-10-08 1934-04-09 Robert Ernest Workman Improvements in or relating to rotary fans
US2267275A (en) * 1939-11-25 1941-12-23 Gen Machine Company Inc Fan muffler
US3120876A (en) * 1961-05-03 1964-02-11 Edward F Lirette Air intake silencer
US3540547A (en) * 1968-12-31 1970-11-17 Charles Waddell Coward Jr Acoustical systems for air moving devices
US3748997A (en) * 1972-04-06 1973-07-31 Tempmaster Corp Acoustical insulated fan and temperature conditioning penthouse unit
GB1529946A (en) * 1976-03-03 1978-10-25 Fans & Blowers Ltd Silencers for centrifugal blowers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126221A2 (en) * 1983-03-02 1984-11-28 Hans Dr. Viessmann Forced-draught burner for heating-boiler doors
EP0126221A3 (en) * 1983-03-02 1986-02-12 Hans Dr. Viessmann Forced-draught burner for heating-boiler doors
DE19934586A1 (en) * 1999-07-23 2001-01-25 Behr Gmbh & Co fan

Also Published As

Publication number Publication date
FR2457399B1 (en) 1983-10-21

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Legal Events

Date Code Title Description
CA Change of address
ST Notification of lapse