EP0066158A1 - Ventilator für die Kühleinheit eines Fahrzeugmotors - Google Patents

Ventilator für die Kühleinheit eines Fahrzeugmotors Download PDF

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Publication number
EP0066158A1
EP0066158A1 EP82104254A EP82104254A EP0066158A1 EP 0066158 A1 EP0066158 A1 EP 0066158A1 EP 82104254 A EP82104254 A EP 82104254A EP 82104254 A EP82104254 A EP 82104254A EP 0066158 A1 EP0066158 A1 EP 0066158A1
Authority
EP
European Patent Office
Prior art keywords
cooling fan
blades
boss
ring
automotive vehicle
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.)
Withdrawn
Application number
EP82104254A
Other languages
English (en)
French (fr)
Inventor
Nakanobu Nissan Motor Company Limited Seki
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of EP0066158A1 publication Critical patent/EP0066158A1/de
Withdrawn legal-status Critical Current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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud

Definitions

  • the present invention relates generally to a cooling fan of an engine cooling unit used with an automotive vehicle, and more particularly to an annular ring rigidly connecting the tips of the blades of the cooling fan.
  • an automotive vehicle engine cooling fan is disposed between a radiator and an engine in order to introduce outside air into the engine compartment to cool the radiator. Further, the cooling fan is usually fitted to the axle of a water pump and driven by a crank shaft.
  • the oblique-flow type cooling fan comprises a conical boss and a plurality of blades, and some of the axial-flow type cooling fan comprise additionally a ring connecting the tips of the blades.
  • the blades are inclined at a large angle to the direction of flow, they can produce quite a large amount of air flow, but a relatively great reaction force due to resistance to air flow is applied to the blades. As a result, in the case where ambient temperature is high, there exists a problem in that the strength and the durability may not be sufficient.
  • the above-mentioned problem can be solved by constraining the blade tips with the ring, which also has the same effect of reducing the tip clearance and can increase the amount of air flow significantly, but still less than that of the oblique-flow type.
  • the cooling fan for an automotive vehicle engine cooling unit ' comprises a truncated-cone-shaped boss portion, a plurality of blades fixed to the boss portion at a predetermined twist angle, and an annular ring rigidly connecting the ends of the blades in such a way that the width of the ring is in the range of from one-fourth to three-fourths of the height of the boss- portion.
  • the cooling fan according to the present invention ensures sufficient mechanical strength while preventing reduction of the air-flow rate, thereby combining the advantages of the oblique-flow type (large air-flow rate) and the axial-flow type (large mechanical strength).
  • the reference numeral 1 denotes a cooling fan which includes a hollow truncated-cone-shaped boss portion 2, a mounting plate 3 fixed to the boss portion 2 so as to project radially inward from the boss portion 2, and four blades 4 fixed at a predetermined angle to the outer surface of the boss portion 2.
  • a cooling fan which includes a hollow truncated-cone-shaped boss portion 2, a mounting plate 3 fixed to the boss portion 2 so as to project radially inward from the boss portion 2, and four blades 4 fixed at a predetermined angle to the outer surface of the boss portion 2.
  • each blade 4 is conformed in such a way that the base of the blade is fixed to the boss 2 at an inclination of about 45 degrees with respect to a surface perpendicular to the axis of rotation (referred to as vertical surface hereinafter) and the tip of the blade is inclined at about 65 degrees with respect to the vertical surface.
  • the cooling fan 1 when driven, the cooling fan 1 produces air flow in the direction of arrow X shown in Fig. 3 with the aid of the blades 4 and the boss portion 2.
  • This cooling fan 1 is called an oblique flow type fan.
  • the reference numeral 1 denotes a cooling fan for an automotive vehicle.
  • the cooling fan according to the present invention comprises a hollow truncated-cone-shaped boss portion 2, a mounting plate 3 fixed to the boss portion 2 so as to project radially inward from the inside surface of the boss portion 2, a plurality of blades 4 (four blades in this embodiment) fixed to the outside surface of the boss portion 2 at a predetermined angle, and an annular ring 5 rigidly connecting the tips of the blades 4 together.
  • the blades 4 are disposed radially symmetrically around the boss portion, and are inclined at an angle of about 45 degrees at the bases thereof and at an ..angle of about 65 degrees at the tips thereof with respect to the vertical surface, as depicted in Fig. 8. Furthermore, as depicted in Fig. 9, the surface of the boss portion 2 is inclined at about 45 degrees with respect to the axis of rotation.
  • the ring 5 is fixed to the upstream side of the tip of each blade 4.
  • the width i of the ring 5 (the axial dimension thereof) is formed so as to be between one-fourth and three-fourths of the height h of the boss portion 2 (the axial dimension thereof) or the width of the blades 4. That is, the relationship between the ring width l and the boss height h is as follows:
  • the ring 5 does not create aerodynamic resistance as the air flows obliquely, that is, in the radial direction to the fan 1.
  • the air flow rate from the cooling fan in Fig. 7 compares with that from the fan of Fig. 1.
  • the abscissa indicates the ratio of ring width i to boss height h, and the axis of ordinate indicates the rate of air flow produced just downstream of the fan 1.
  • the reason the ring width l is restricted to more than one-fourth of the boss height h as expressed by the above expression is to ensure the mechanical strength of the cooling fan (1). Although dependent upon the material of the fan, if the width l of the ring 5 is at least one-fourth of the boss height h, it is possible to ensure adequate strength and durability.
  • the cooling fan comprises a truncated-cone-shaped boss portion, a plurality of blades fixed to the boss portion at a predetermined inclination, and a ring rigidly connecting the tip of the blades, in such a way that the width of the above-mentioned ring is in the range of from one-fourth to three-fourths of the height of the above-mentioned boss portion, it is possible to ensure adequate mechanical strength, improve durability, maintain high air flow efficiency, and thus ensure efficient cooling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP82104254A 1981-05-21 1982-05-14 Ventilator für die Kühleinheit eines Fahrzeugmotors Withdrawn EP0066158A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP73709/81 1981-05-21
JP7370981 1981-05-21

Publications (1)

Publication Number Publication Date
EP0066158A1 true EP0066158A1 (de) 1982-12-08

Family

ID=13526009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104254A Withdrawn EP0066158A1 (de) 1981-05-21 1982-05-14 Ventilator für die Kühleinheit eines Fahrzeugmotors

Country Status (1)

Country Link
EP (1) EP0066158A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310391A2 (de) * 1987-10-01 1989-04-05 Seiko Electronic Components Ltd. Axiallüfter
WO1999031391A1 (en) * 1997-12-15 1999-06-24 Caterpillar Inc. Radiator cooling fan
FR2969229A1 (fr) * 2010-12-20 2012-06-22 Valeo Systemes Thermiques Helice de ventilateur et module de refroidissement associe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779424A (en) * 1953-03-27 1957-01-29 Lyon George Albert Impeller
US3028072A (en) * 1958-05-05 1962-04-03 Torrington Mfg Co Air impelling fan and associated part
DE2756880A1 (de) * 1976-12-20 1978-06-22 Toyoda Chuo Kenkyusho Kk Axialventilator mit hilfsfluegeln
GB2014658A (en) * 1978-02-15 1979-08-30 Papst Motoren Kg Fans
FR2445457A1 (fr) * 1978-12-26 1980-07-25 Nissan Motor Ventilateur de refroidissement d'un radiateur pour vehicule automobile
GB1586763A (en) * 1977-08-17 1981-03-25 Nu Aire Contracts Ltd Fractional solidity impeller units
EP0044243A2 (de) * 1980-07-10 1982-01-20 Canadian Fram Limited Axialgebläse mit sowohl radialem als auch axialem Luftaustrittsteil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779424A (en) * 1953-03-27 1957-01-29 Lyon George Albert Impeller
US3028072A (en) * 1958-05-05 1962-04-03 Torrington Mfg Co Air impelling fan and associated part
DE2756880A1 (de) * 1976-12-20 1978-06-22 Toyoda Chuo Kenkyusho Kk Axialventilator mit hilfsfluegeln
GB1586763A (en) * 1977-08-17 1981-03-25 Nu Aire Contracts Ltd Fractional solidity impeller units
GB2014658A (en) * 1978-02-15 1979-08-30 Papst Motoren Kg Fans
FR2445457A1 (fr) * 1978-12-26 1980-07-25 Nissan Motor Ventilateur de refroidissement d'un radiateur pour vehicule automobile
EP0044243A2 (de) * 1980-07-10 1982-01-20 Canadian Fram Limited Axialgebläse mit sowohl radialem als auch axialem Luftaustrittsteil

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310391A2 (de) * 1987-10-01 1989-04-05 Seiko Electronic Components Ltd. Axiallüfter
EP0310391A3 (en) * 1987-10-01 1990-05-09 Seiko Electronic Components Ltd. Axial flow fan
WO1999031391A1 (en) * 1997-12-15 1999-06-24 Caterpillar Inc. Radiator cooling fan
US6082969A (en) * 1997-12-15 2000-07-04 Caterpillar Inc. Quiet compact radiator cooling fan
FR2969229A1 (fr) * 2010-12-20 2012-06-22 Valeo Systemes Thermiques Helice de ventilateur et module de refroidissement associe
WO2012084499A1 (fr) * 2010-12-20 2012-06-28 Valeo Systemes Thermiques Hélice de ventilateur et module de refroidissement associé

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19820514

AK Designated contracting states

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840620

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SEKI, NAKANOBUNISSAN MOTOR COMPANY, LIMITED