US3832085A - Automotive fan shroud - Google Patents

Automotive fan shroud Download PDF

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Publication number
US3832085A
US3832085A US00295048A US29504872A US3832085A US 3832085 A US3832085 A US 3832085A US 00295048 A US00295048 A US 00295048A US 29504872 A US29504872 A US 29504872A US 3832085 A US3832085 A US 3832085A
Authority
US
United States
Prior art keywords
shroud
fan
projections
circumferentially
noise level
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 - Lifetime
Application number
US00295048A
Other languages
English (en)
Inventor
Fauw R De
R Murley
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.)
Ford Motor Co
Original Assignee
Ford Motor Co
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 Ford Motor Co filed Critical Ford Motor Co
Priority to US00295048A priority Critical patent/US3832085A/en
Priority to CA176,264A priority patent/CA996080A/en
Priority to AU59367/73A priority patent/AU470728B2/en
Priority to DE19732345506 priority patent/DE2345506A1/de
Priority to GB4362673A priority patent/GB1412680A/en
Priority to JP48111048A priority patent/JPS4971335A/ja
Application granted granted Critical
Publication of US3832085A publication Critical patent/US3832085A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/914—Device to control boundary layer

Definitions

  • ABSTRACT A shroud enclosing an automotive type fan has ridges projecting from the internal surface equally spaced circumferentially to provide a circumferentially undulating pattern to the axial flow of air forced through the space between the shroud and the fan to reduce the noise level of the shroud-fan combination.
  • AUTOMOTIVE FAN SHROUD This invention relates, in general, to an automotive type fan shroud. More particularly, it relates to a construction to reduce the noise level of a fan shroud combination.
  • the invention provides a construction to reduce noise level in which the circumferential pattern to the flow of air past the shroud and fan blades is undulating and provided by ridges located on the internal surface of the shroud equally spaced circumferentially around the shroud.
  • FIG. 1 is an end elevational view of a fan shroud embodying the invention
  • FIG. 2 is a side elevational view of the fan shroud of HO. 1, with parts broken away and in section, and,
  • HG. 3 shows a modification.
  • the fan shroud of the invention is adapted to cooperate with a fan of the automotive type, such as, for example, that indicated at in phantom in FIGS. 1' and 2.
  • the fan would be mounted in a conventional manner on the engine, and would generally be of a stamped steel or similar design having a number (4 in this case) of circumferentially spaced fan blades 12. It will be understood of course that the number and spacing and construction of the fan play no part in the present invention and is optional insofar as the fan shroud construction is concerned.
  • the fan shroud in this case consists of a narrow section 14 of a thin cylinder that circumferentially surrounds and axially encloses the fan blades. It has a generally smooth exterior surface 16 that is welded or otherwise suitably secured to a generally rectangular supporting structure 18. The latter would be secured in a known manner adjacent the radiator of the motor vehicle for cooperation of the fan therewith to pull airflow through the radiator into the engine compartment.
  • the upper portion of the leading edge of the fan shroud 16 is formed with a cover forcontrol purposes, for example, to control the total flow of air and provide proper restriction, as is common in an automotive fan shroud installation.
  • ridges or projections 24 Attached to the inner surface 22 of shroud 14 are a plurality of ridges or projections 24 that extend axially for approximately an inch, for example, and are oriented with an axis parallel to the axis of the shroud.
  • the ridges have a finger-like appearance, and are equally spaced circumferentially around the shroud inner surface, for example, in this case, approximately four inches apart.
  • the ridges have a generally hat-shaped or square-like cross-section, I although FIG. 3 indicates that the ridges 24' could have a half-round crosssection with a radius of approximately 0.25 inches.
  • the radial projection of the ridges defines an annular clearance space between the ridges and fan blades, as shown.
  • each of the ridges 24 is tapered axially at its leading edge for a nonturbulent entrance of the air past the ridges.
  • the above construction provides for the smooth entrance of air into the shroud, with the circumferentially undulating pattern reducing the shroud fan combination noise level.
  • An automotive type fan shroud including a generally cylindrical section adapted to surround and axially enclose a fan and having circumferentially spaced projections from the internal surface to provide a circumferentially undulating pattern to the axial. flow of air past the shroud thereby reducing fan-shroud combination noise level the fan having blades enclosed by the shroud, a radial clearance space being provided between the inner extremities of the projections and the outer radial extent of the fan blades.
  • a fan shroud as in claim 1 the projections each having a finger like appearance oriented parallel to the shroud axis and the projections together being equally spaced circumferentially around the shroud internal surface.
  • a fan shroud as in claim 2, the projections having an axially extending taper at the air entrance end.
US00295048A 1972-10-04 1972-10-04 Automotive fan shroud Expired - Lifetime US3832085A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US00295048A US3832085A (en) 1972-10-04 1972-10-04 Automotive fan shroud
CA176,264A CA996080A (en) 1972-10-04 1973-07-12 Automotive fan shroud
AU59367/73A AU470728B2 (en) 1972-10-04 1973-08-20 Automotive fan shroud
DE19732345506 DE2345506A1 (de) 1972-10-04 1973-09-08 Luftleiteinrichtung fuer ventilatoren, insbesondere fuer kraftfahrzeugmotoren
GB4362673A GB1412680A (en) 1972-10-04 1973-09-18 Fan shrouds particularly for fans for automobile engines
JP48111048A JPS4971335A (ja) 1972-10-04 1973-10-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00295048A US3832085A (en) 1972-10-04 1972-10-04 Automotive fan shroud

Publications (1)

Publication Number Publication Date
US3832085A true US3832085A (en) 1974-08-27

Family

ID=23135994

Family Applications (1)

Application Number Title Priority Date Filing Date
US00295048A Expired - Lifetime US3832085A (en) 1972-10-04 1972-10-04 Automotive fan shroud

Country Status (6)

Country Link
US (1) US3832085A (ja)
JP (1) JPS4971335A (ja)
AU (1) AU470728B2 (ja)
CA (1) CA996080A (ja)
DE (1) DE2345506A1 (ja)
GB (1) GB1412680A (ja)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061188A (en) * 1975-01-24 1977-12-06 International Harvester Company Fan shroud structure
JPS53115914A (en) * 1977-03-18 1978-10-09 Matsushita Electric Ind Co Ltd Electric blower
JPS53115912A (en) * 1977-03-18 1978-10-09 Matsushita Electric Ind Co Ltd Electric blower
JPS53115913A (en) * 1977-03-18 1978-10-09 Matsushita Electric Ind Co Ltd Electric blower
US4152094A (en) * 1975-10-31 1979-05-01 Hitachi, Ltd. Axial fan
US4662818A (en) * 1983-07-23 1987-05-05 International Standard Electric Corporation Tangential blower
US4927328A (en) * 1989-03-02 1990-05-22 Scoates William D Shroud assembly for axial flow fans
US5277541A (en) * 1991-12-23 1994-01-11 Allied-Signal Inc. Vaned shroud for centrifugal compressor
US5507703A (en) * 1992-07-16 1996-04-16 Gkn Viscodrive Gmbh Differential drive
US5518364A (en) * 1993-03-27 1996-05-21 Deutsche Forschungsanstalt For Luft-Und Raumfahrt E.V. Method for the reduction of sound emission as well as for the improvement of the air output and the efficiency in an axial flow machine, and flow machine
US6123051A (en) * 1998-08-12 2000-09-26 Chrysler Corporation Shroud for an engine cooling fan
US6264427B1 (en) 1999-02-10 2001-07-24 Shop-Vac Corporation Vaneless impeller housing for a vacuum cleaner
US6375416B1 (en) 1993-07-15 2002-04-23 Kevin J. Farrell Technique for reducing acoustic radiation in turbomachinery
US6746391B2 (en) * 2001-11-09 2004-06-08 Eppendorf Ag Swing-out-rotor laboratory centrifuge with noise abatement system
FR2943000A1 (fr) * 2009-03-12 2010-09-17 Peugeot Citroen Automobiles Sa Buse, groupe moto-ventilateur et vehicule equipe de cette buse.
US20110064559A1 (en) * 2006-06-27 2011-03-17 Socpra-Sciences Et Genie, S.E.C. Method and apparatus for controlling tonal noise from subsonic fans
US9180772B2 (en) * 2011-04-26 2015-11-10 Denso Thermal Systems S.P.A. Fan assembly for vehicles

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5540342Y2 (ja) * 1975-07-10 1980-09-20
JP2767045B2 (ja) * 1988-10-31 1998-06-18 臼井国際産業 株式会社 ラジエータ用シュラウド
EP0746689B1 (en) * 1993-08-30 2002-04-24 Robert Bosch Corporation Housing with recirculation control for use with banded axial-flow fans

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693352A (en) * 1922-12-06 1928-11-27 Westinghouse Electric & Mfg Co Dredger pump
US1993158A (en) * 1930-09-08 1935-03-05 George D Roper Corp Air moving apparatus
US2202790A (en) * 1938-02-23 1940-05-28 Allis Chalmers Mfg Co Waste paper stock pump
US2558816A (en) * 1947-08-16 1951-07-03 United Aircraft Corp Fluid mixing device
US2650752A (en) * 1949-08-27 1953-09-01 United Aircraft Corp Boundary layer control in blowers
US2844001A (en) * 1953-01-06 1958-07-22 Gen Electric Flow straightening vanes for diffuser passages
US2944623A (en) * 1955-09-02 1960-07-12 Jr Albert G Bodine Jet engine noise reducer
DE1161481B (de) * 1960-03-19 1964-01-16 Voith Gmbh J M Einrichtung zur Stabilisierung der Charakteristik von Kreiselradarbeitsmaschinen mit axialdurchstroemtem Laufrad
US3610262A (en) * 1969-10-07 1971-10-05 Boeing Co Stowable vane sonic throat inlet for jet aircraft noise suppression

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693352A (en) * 1922-12-06 1928-11-27 Westinghouse Electric & Mfg Co Dredger pump
US1993158A (en) * 1930-09-08 1935-03-05 George D Roper Corp Air moving apparatus
US2202790A (en) * 1938-02-23 1940-05-28 Allis Chalmers Mfg Co Waste paper stock pump
US2558816A (en) * 1947-08-16 1951-07-03 United Aircraft Corp Fluid mixing device
US2650752A (en) * 1949-08-27 1953-09-01 United Aircraft Corp Boundary layer control in blowers
US2844001A (en) * 1953-01-06 1958-07-22 Gen Electric Flow straightening vanes for diffuser passages
US2944623A (en) * 1955-09-02 1960-07-12 Jr Albert G Bodine Jet engine noise reducer
DE1161481B (de) * 1960-03-19 1964-01-16 Voith Gmbh J M Einrichtung zur Stabilisierung der Charakteristik von Kreiselradarbeitsmaschinen mit axialdurchstroemtem Laufrad
US3610262A (en) * 1969-10-07 1971-10-05 Boeing Co Stowable vane sonic throat inlet for jet aircraft noise suppression

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061188A (en) * 1975-01-24 1977-12-06 International Harvester Company Fan shroud structure
US4152094A (en) * 1975-10-31 1979-05-01 Hitachi, Ltd. Axial fan
JPS53115914A (en) * 1977-03-18 1978-10-09 Matsushita Electric Ind Co Ltd Electric blower
JPS53115912A (en) * 1977-03-18 1978-10-09 Matsushita Electric Ind Co Ltd Electric blower
JPS53115913A (en) * 1977-03-18 1978-10-09 Matsushita Electric Ind Co Ltd Electric blower
US4662818A (en) * 1983-07-23 1987-05-05 International Standard Electric Corporation Tangential blower
US4927328A (en) * 1989-03-02 1990-05-22 Scoates William D Shroud assembly for axial flow fans
US5277541A (en) * 1991-12-23 1994-01-11 Allied-Signal Inc. Vaned shroud for centrifugal compressor
US5507703A (en) * 1992-07-16 1996-04-16 Gkn Viscodrive Gmbh Differential drive
US5518364A (en) * 1993-03-27 1996-05-21 Deutsche Forschungsanstalt For Luft-Und Raumfahrt E.V. Method for the reduction of sound emission as well as for the improvement of the air output and the efficiency in an axial flow machine, and flow machine
US6375416B1 (en) 1993-07-15 2002-04-23 Kevin J. Farrell Technique for reducing acoustic radiation in turbomachinery
US6123051A (en) * 1998-08-12 2000-09-26 Chrysler Corporation Shroud for an engine cooling fan
US6358005B1 (en) 1999-02-10 2002-03-19 Shop Vac Corporation Vaneless impeller housing for a vacuum cleaner
US6264427B1 (en) 1999-02-10 2001-07-24 Shop-Vac Corporation Vaneless impeller housing for a vacuum cleaner
US6485259B2 (en) 1999-02-10 2002-11-26 Shop Vac Corporation Vaneless impeller housing for a vacuum cleaner
US6746391B2 (en) * 2001-11-09 2004-06-08 Eppendorf Ag Swing-out-rotor laboratory centrifuge with noise abatement system
US20110064559A1 (en) * 2006-06-27 2011-03-17 Socpra-Sciences Et Genie, S.E.C. Method and apparatus for controlling tonal noise from subsonic fans
US8777560B2 (en) 2006-06-27 2014-07-15 Socpra—Sciences et Genie, S.E.C. Method and apparatus for controlling tonal noise from subsonic fans
FR2943000A1 (fr) * 2009-03-12 2010-09-17 Peugeot Citroen Automobiles Sa Buse, groupe moto-ventilateur et vehicule equipe de cette buse.
US9180772B2 (en) * 2011-04-26 2015-11-10 Denso Thermal Systems S.P.A. Fan assembly for vehicles

Also Published As

Publication number Publication date
AU470728B2 (en) 1976-03-25
GB1412680A (en) 1975-11-05
AU5936773A (en) 1975-02-20
JPS4971335A (ja) 1974-07-10
DE2345506A1 (de) 1974-04-11
CA996080A (en) 1976-08-31

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