EP0168594A1 - Axiallüfter - Google Patents

Axiallüfter Download PDF

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Publication number
EP0168594A1
EP0168594A1 EP85106245A EP85106245A EP0168594A1 EP 0168594 A1 EP0168594 A1 EP 0168594A1 EP 85106245 A EP85106245 A EP 85106245A EP 85106245 A EP85106245 A EP 85106245A EP 0168594 A1 EP0168594 A1 EP 0168594A1
Authority
EP
European Patent Office
Prior art keywords
blade
fan
ring
hub
blades
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
EP85106245A
Other languages
English (en)
French (fr)
Other versions
EP0168594B1 (de
Inventor
Nader Canadian Fram Limited Pezeshkzad
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.)
Canadian Fram Ltd
Original Assignee
Canadian Fram Ltd
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 Canadian Fram Ltd filed Critical Canadian Fram Ltd
Publication of EP0168594A1 publication Critical patent/EP0168594A1/de
Application granted granted Critical
Publication of EP0168594B1 publication Critical patent/EP0168594B1/de
Expired legal-status Critical Current

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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
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • F04D29/386—Skewed blades

Definitions

  • This invention relates generally to automotive fans and more specifically to axial flow fans exhibiting low acoustic noise. This invention further relates to the cooling fans appropriate for vehicles where the fan may continue to operate after the engine is turned off or where the other noise sources have been intentionally quieted to a degree that the fan is the dominant noise source.
  • Blade tip vortices have been studied since very early days of the turbomachinery; the tip clearance, the distance between the blades and the casing or shroud, create a leakage of flow from the pressure side to the suction side of the blade. This leakage not only causes a loss in the efficiency (flow output/power input) but creates two major vortices, usually referred as clearance vortex and passage vortex, which contribute to the increased noise levels.
  • the configuration of the ring around the blades has been designed to eliminate the tip vortices and to eliminate the direct air recirculation once the flow is discharged out of the fan.
  • the invention comprises: a fan comprising: a hub rotationally supported and adapted to be driven by a drive: a plurality of fan blades each secured at a root end to said hub and at a tip end to a ring concentric to the hub.
  • the fan blades comprise a blade having a cross section including a blade chord which increases as a function of blade radius over the outer 80% thereof and a blade thickness which increases as a function of blade radius over the outer 30% thereof.
  • the camber angle, (the angle each blade makes with the plane of rotation) decreases with blade radius all along the blade.
  • FIGURE 1 illustrates a typical automotive application of an electrically driven fan.
  • an engine 20 positioned behind a radiator 22.
  • An air conditioning condenser 24 may be located in a known manner in front of the radiator 22.
  • the system 10 may comprise a shroud 26 which extends from the radiator over a portion of an electrically driven fan 32.
  • the shroud 26 has a generally circular cross section in the vicinity of the fan 32 and is closely spaced from the ends thereof.
  • the fan 32 is driven by an electric motor 30 in a conventional manner.
  • the fan 32 is preferably fabricated of molded plastic and comprises a hub 50.
  • the hub 50 may be reinforced through some radial vanes 52 having a central member 54 which defines an opening 56.
  • the opening 56 is adapted to accept the shaft of a motor, such as motor 30.
  • the front surface of the hub 50 supports a mounting clip 58 that secures the fan 32 on the drive shaft of the electrical motor 30.
  • the fan 32 further includes a pluality of blades 62 (a-c) which are symmetrically positioned relative to and extend from the hub 50.
  • the tip edge or end 64 of each blade 62 is secured to a ring 66 which is centrally and axially positioned relative to the axis of the hub 50.
  • the tip edge 64 of blade 62a is shown in the cutout portion of FIGURE 2.
  • the ring 66 comprises an axially expending band 68 having a flared out, bell shaped leading edge 70 at the forward or low pressure side thereof.
  • the inner surface 72 of the band 68 flares radially outwardly to provide a cross section of decreasing thickness as illustrated in FIGURE 10.
  • the inner surface 72 is also referred to as a flared out trailing edge 72.
  • the inner surface 72 tapers over at least 40% of its length.
  • the inner surface 72 terminates at an internal edge 76.
  • the bell mouth shaped leading edge 70 serves to block air recirculation thus increasing operating efficiency and enhancing the quiet operation of the cooling system.
  • Each blade further comprises a root end 80, a leading edge 84 and a trailing edge 86.
  • Each root end 80 is attached over its full width to the hub 50.
  • the tip end 64 is secured over its entire length to the inner surface 72 of the ring 66.
  • a greater portion of the tip end 64 is connected to the ring 66 with the exception of the trailing portion of the tip end 69 proximate the trailing edge 86 which extends beyond the internal edge 76 of the ring 66.
  • the extension of the blade above the ring may provide an increase in the rate of the air flow depending on the location of the trailing edge of the shroud 26.
  • FIGURE 5 graphically illustrates the relationship of cord length, 1, and blade thickness, t, as a function of radius. Selective blade sections are shown in greater detail in FIGURES 6-9. It can be seen from these FIGURES that the cord length increases dramatically over the outer 30% of the blade 62 thereby giving the blade its forwardly swept appearance. In addition, the thickness of the cord or blade thickness is shown to increase over the outer 80% of the radius. In addition the blade angle decreases along the fan blade.
  • FIGURE 3 illustrates a plan frontal view of the fan 32 and to FIGURE 10 which is a cross-sectional view taken through section A-A of FIGURE 3.
  • FIGURE 10 illustrates in greater detail the structure of the ring 66, hub 50 and reinforcing vanes 52 construction. In the embodiment of the invention illustrated in FIGURES 3 and 10, the reinforcing vanes 52 are formed as an integral extension of the hub 50.
  • FIGURE 10 further illustrates the relationship of an exemplary blade 62 to the ring 66 and, more particularly, illustrates how the underside 94 of each blade 62 intersects the inner surface 72 of the ring 66 in a smooth transition.
  • FIGURE 11 illustrates a plan view of a single blade and to TABLE 1.
  • FIGURE 11 illustrates a number of points (1-49) located on both surfaces of the fan blade 62 which, when used in conjunction with the information on TABLE 1, identify the detailed construction of the blade It should be appreciated the precise dimensions of the fan blade will vary with application.
  • the identifying numerals in FIGURE 11 are located at the intersection of varying radii with rays which are located at various angles such as: +10°, -10°, +20° -20°, etc., from the Section A-A reference line.
  • the radius of the fan is approximately 178mm and the radius of the hub is approximately 70mm.
  • the cord length of the blade at its root, taken through points 1-37, is approximately 80mm while the cord length at its tip end is approximately 180mm.
  • the blade angle at its root is approximately 25° and decreases to approximately 10 0 at its tip edge.
  • each fan blade has a blade cord which is a function of blade radius and increases over at least the outer 80% of the radius of the blades. Further, each blade has an increasing blade thickness as a function of radius and, more particularly, the blade thickness increases over the outer 30% of the radius of each blade.
  • the underside 94 of each blade especially in the vicinity of the tip edge, has a modified airfoil configuration wherein the cross section of the blade, starting at its leading edge, has a concavo-convex cross section due to the curvilinear nature of the lower or underside 94.
EP19850106245 1984-06-27 1985-05-22 Axiallüfter Expired EP0168594B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62488084A 1984-06-27 1984-06-27
US624880 1984-06-27

Publications (2)

Publication Number Publication Date
EP0168594A1 true EP0168594A1 (de) 1986-01-22
EP0168594B1 EP0168594B1 (de) 1989-02-01

Family

ID=24503719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850106245 Expired EP0168594B1 (de) 1984-06-27 1985-05-22 Axiallüfter

Country Status (4)

Country Link
EP (1) EP0168594B1 (de)
JP (1) JPS6116298A (de)
AU (1) AU4311885A (de)
DE (1) DE3568072D1 (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192653A1 (de) * 1984-08-06 1986-09-03 Airflow Res & Mfg Blasvorrichtung hoher festigkeit.
GB2175963B (en) * 1984-08-16 1989-07-19 Sarlin Ab Oy E Impeller for a pump, especially a vortex pump
US5064345A (en) * 1989-11-16 1991-11-12 Airflow Research And Manufacturing Corporation Multi-sweep blade with abrupt sweep transition
EP0489997A1 (de) * 1989-09-18 1992-06-17 The Torrington Research Company Verbessertes Axialströmungsrad
FR2693240A1 (fr) * 1992-07-02 1994-01-07 Sardou Max Dispositif permettant de transformer l'énergie mécanique d'un moteur en un déplacement d'un gaz.
US5297931A (en) * 1991-08-30 1994-03-29 Airflow Research And Manufacturing Corporation Forward skew fan with rake and chordwise camber corrections
GB2281593A (en) * 1993-09-03 1995-03-08 Tygar Co Ltd Fan blade.
US5489186A (en) * 1991-08-30 1996-02-06 Airflow Research And Manufacturing Corp. Housing with recirculation control for use with banded axial-flow fans
WO1996019669A1 (en) * 1994-12-22 1996-06-27 Helpman Intellectual Properties B.V. Fan
WO1996019670A2 (en) * 1994-12-22 1996-06-27 Helpman Intellectual Properties B.V. Domestic fan
WO1998054470A1 (fr) * 1997-05-28 1998-12-03 Wei Han Ventilateur tangentiel a bande externe
US20120171043A1 (en) * 2010-12-29 2012-07-05 Delta Electronics, Inc. Fan and impeller thereof
CN106762824A (zh) * 2016-12-07 2017-05-31 浙江理工大学 带叶脉状结构和海鸥型分流叶片的轴流风机三元叶轮
CN108026936A (zh) * 2015-08-05 2018-05-11 斯佩尔汽车有限公司 轴流式风扇
CN114412834A (zh) * 2022-03-31 2022-04-29 佛山市南海九洲普惠风机有限公司 一种复合仿生翼型叶片及轴流风机叶轮

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2590514B2 (ja) * 1987-03-13 1997-03-12 日本電装株式会社 送風ファン

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2212041A (en) * 1939-06-08 1940-08-20 Iig Electric Ventilating Compa Fan wheel
GB589566A (en) * 1945-01-19 1947-06-24 Michael Thaddius Adamtchik Improvements in or relating to guide vanes for axial flow screw fans, propellers, pumps, turbines and the like
FR1050902A (fr) * 1952-02-15 1954-01-12 Perfectionnements aux ventilateurs hélicoïdes et appareils analogues
FR1133676A (fr) * 1954-10-15 1957-04-01 Soufflerie axiale à moyeu conique
FR1183713A (fr) * 1957-07-12 1959-07-13 Calor Sa Hélice en matière moulée
US3168235A (en) * 1958-12-12 1965-02-02 Lyonnaise Ventilation Helicoidal fans
FR2339740A1 (fr) * 1976-01-28 1977-08-26 Torin Corp Roue de turbine a ecoulement axial
US4358245A (en) * 1980-09-18 1982-11-09 Bolt Beranek And Newman Inc. Low noise fan
US4396351A (en) * 1979-12-21 1983-08-02 Aisin Seiki Kabushiki Kaisha Engine cooling fan
GB2116642A (en) * 1982-03-15 1983-09-28 Sueddeutsche Kuehler Behr Axial fan

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2212041A (en) * 1939-06-08 1940-08-20 Iig Electric Ventilating Compa Fan wheel
GB589566A (en) * 1945-01-19 1947-06-24 Michael Thaddius Adamtchik Improvements in or relating to guide vanes for axial flow screw fans, propellers, pumps, turbines and the like
FR1050902A (fr) * 1952-02-15 1954-01-12 Perfectionnements aux ventilateurs hélicoïdes et appareils analogues
FR1133676A (fr) * 1954-10-15 1957-04-01 Soufflerie axiale à moyeu conique
FR1183713A (fr) * 1957-07-12 1959-07-13 Calor Sa Hélice en matière moulée
US3168235A (en) * 1958-12-12 1965-02-02 Lyonnaise Ventilation Helicoidal fans
FR2339740A1 (fr) * 1976-01-28 1977-08-26 Torin Corp Roue de turbine a ecoulement axial
US4396351A (en) * 1979-12-21 1983-08-02 Aisin Seiki Kabushiki Kaisha Engine cooling fan
US4358245A (en) * 1980-09-18 1982-11-09 Bolt Beranek And Newman Inc. Low noise fan
GB2116642A (en) * 1982-03-15 1983-09-28 Sueddeutsche Kuehler Behr Axial fan

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192653A1 (de) * 1984-08-06 1986-09-03 Airflow Res & Mfg Blasvorrichtung hoher festigkeit.
EP0192653A4 (de) * 1984-08-06 1988-06-23 Airflow Res & Mfg Corp Blasvorrichtung hoher festigkeit.
GB2175963B (en) * 1984-08-16 1989-07-19 Sarlin Ab Oy E Impeller for a pump, especially a vortex pump
EP0489997A1 (de) * 1989-09-18 1992-06-17 The Torrington Research Company Verbessertes Axialströmungsrad
US5064345A (en) * 1989-11-16 1991-11-12 Airflow Research And Manufacturing Corporation Multi-sweep blade with abrupt sweep transition
US5297931A (en) * 1991-08-30 1994-03-29 Airflow Research And Manufacturing Corporation Forward skew fan with rake and chordwise camber corrections
US5489186A (en) * 1991-08-30 1996-02-06 Airflow Research And Manufacturing Corp. Housing with recirculation control for use with banded axial-flow fans
FR2693240A1 (fr) * 1992-07-02 1994-01-07 Sardou Max Dispositif permettant de transformer l'énergie mécanique d'un moteur en un déplacement d'un gaz.
GB2281593A (en) * 1993-09-03 1995-03-08 Tygar Co Ltd Fan blade.
WO1996019670A2 (en) * 1994-12-22 1996-06-27 Helpman Intellectual Properties B.V. Domestic fan
WO1996019669A1 (en) * 1994-12-22 1996-06-27 Helpman Intellectual Properties B.V. Fan
NL9402191A (nl) * 1994-12-22 1996-08-01 Helpman Intellectual Propertie Ventilator.
WO1996019670A3 (en) * 1994-12-22 1996-09-12 Helpman Intellectual Propertie Domestic fan
WO1998054470A1 (fr) * 1997-05-28 1998-12-03 Wei Han Ventilateur tangentiel a bande externe
US20120171043A1 (en) * 2010-12-29 2012-07-05 Delta Electronics, Inc. Fan and impeller thereof
US10428830B2 (en) * 2010-12-29 2019-10-01 Delta Electronics, Inc. Fan and impeller thereof
CN108026936A (zh) * 2015-08-05 2018-05-11 斯佩尔汽车有限公司 轴流式风扇
US10577941B2 (en) 2015-08-05 2020-03-03 Spal Automotive S.R.L. Axial fan
CN106762824A (zh) * 2016-12-07 2017-05-31 浙江理工大学 带叶脉状结构和海鸥型分流叶片的轴流风机三元叶轮
CN106762824B (zh) * 2016-12-07 2023-05-30 浙江理工大学 带叶脉状结构和海鸥型分流叶片的轴流风机三元叶轮
CN114412834A (zh) * 2022-03-31 2022-04-29 佛山市南海九洲普惠风机有限公司 一种复合仿生翼型叶片及轴流风机叶轮
CN114412834B (zh) * 2022-03-31 2022-06-07 佛山市南海九洲普惠风机有限公司 一种复合仿生翼型叶片及轴流风机叶轮

Also Published As

Publication number Publication date
AU4311885A (en) 1986-01-02
EP0168594B1 (de) 1989-02-01
DE3568072D1 (en) 1989-03-09
JPS6116298A (ja) 1986-01-24

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