EP0298861B1 - Sichelförmiger Flügel für ein Laufrad und seine Anwendung bei Autoventilatoren - Google Patents

Sichelförmiger Flügel für ein Laufrad und seine Anwendung bei Autoventilatoren Download PDF

Info

Publication number
EP0298861B1
EP0298861B1 EP88401755A EP88401755A EP0298861B1 EP 0298861 B1 EP0298861 B1 EP 0298861B1 EP 88401755 A EP88401755 A EP 88401755A EP 88401755 A EP88401755 A EP 88401755A EP 0298861 B1 EP0298861 B1 EP 0298861B1
Authority
EP
European Patent Office
Prior art keywords
blade
arc
curvature
foot
propeller
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
EP88401755A
Other languages
English (en)
French (fr)
Other versions
EP0298861A1 (de
Inventor
Jean-Claude Vera
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.)
ECIA Equipements et Composants pour lIndustrie Automobile SA
Original Assignee
ECIA Equipements et Composants pour lIndustrie Automobile 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 ECIA Equipements et Composants pour lIndustrie Automobile SA filed Critical ECIA Equipements et Composants pour lIndustrie Automobile SA
Publication of EP0298861A1 publication Critical patent/EP0298861A1/de
Application granted granted Critical
Publication of EP0298861B1 publication Critical patent/EP0298861B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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

Definitions

  • the present invention relates to blades for a fan motor propeller used in particular in the automotive industry.
  • propellers are used, in particular for fans. This is the case in the automobile industry where motor fans are associated with heat-engine cooling radiators.
  • each blade of a propeller in particular of a fan unit, produces a wake which rotates at the speed of rotation of the propeller.
  • This wake generates a sound which is intense when it encounters a fixed obstacle. This is the case for example when the wake meets the arms of the supports of a fan unit which support the latter to maintain it in a fixed position relative to the radiator with which it is associated.
  • Such axial fans generate a highly turbulent wake which generates significant noise. Indeed, each time the wake of a blade passes in front of a support arm it produces a mechanical impulse which causes a particular noise adding to the aerodynamic noise of the fan and the noise of the motor which drives it.
  • the structure of the wake generated by a blade is a function of the aerodynamic definition of the latter and, in particular, of the evolution of the speed field in the channels which form between two neighboring blades.
  • these wakes can create around the support arms non-stationary systems which are sources of noise if the gap between the trailing edges of the blades of the support arms is relatively small. It has been found that the wake which is in the extension of the trailing edges of the blades disappears relatively quickly at a certain distance downstream, relative to the trailing edge, due to the damping due to the viscosity of the air and that this wake is then lost in the general turbulence of the flow.
  • Fan blades have already been proposed. Solutions are for example set out in documents EP-A-O 192 653 and EP-A-O 294 688, the latter document published after the priority date of this patent. The blades described therein are of a type listed in the preamble to the main claim.
  • the object of the invention is to construct a propeller blade, in particular of a fan unit for automobile use, the geometry of which gives it, at relatively fast speeds, great aerodynamic performance and a high level of silence.
  • the subject of the invention is a blade for a propeller, in particular a fan for a motor vehicle. consisting of a cylindrical central hub to which are fixed the feet of at least two blades where this blade has a leading edge and a trailing edge which are both curved and which are arranged one relative to the other of way to give the blade a sickle-shaped configuration, and where this sickle-shaped configuration tapers from the foot towards the periphery, characterized in that the respective concavities of the curved leading and trailing edges are directed downstream in the direction of flow of the fluid and in that the curved trailing edge consists of two arcs whose own mean radii of curvature are different and are connected without angular point.
  • such a blade is intended for a propeller which comprises an outer fairing made of a peripheral ferrule to which the blade heads are fixed.
  • This type of blade is particularly well suited for fan motor propellers associated with radiators of heat engines of automobiles.
  • the propeller blade according to the invention is intended to be used to make a propeller for a cooling radiator fan of automobile heat engines. It is clear however that such a blade which makes it possible to reduce the noise generated by its wake when it encounters a fixed obstacle located close to its trailing edge and in the wake of the latter, can receive other applications. .
  • a blade 10 is part of a propeller consisting of a central hub 20 and a peripheral ferrule 30.
  • the feet 12 and the blade heads 13 are fixed to this hub and to this ferrule respectively.
  • the blade 10 has a leading edge 14 and a trailing edge 15.
  • Support arms or the like which are intended to support the fan are not shown.
  • leading edges 14 and trailing edges 15 are both curved and are arranged relatively to one another so as to give the blade a sickle-shaped, or saber-like configuration, which going thinner from the foot to the blade head.
  • the respective concavities of the leading edges 14 and trailing edges 15 are directed downstream, in the direction of flow of the fluid shown diagrammatically by the direction of the arrow.
  • the trailing edge 15 consists of two arcs 152, 153 whose radii of curvature ⁇ 2 and ⁇ 3 proper means are different and are connected without angular point.
  • These curve arcs 152 and 153 are arcs of a circle or arcs of conics for example of centers 02 and 03 respectively.
  • the mean radius of curvature ⁇ 2 of the arc 152 located on the side of the foot 12 of the blade, must be smaller than the mean radius of curvature 3 of the arc 153, located on the side of the blade head 13.
  • this radius ⁇ 2 of the arc 152 is approximately approximately between a quarter and a third of the outside diameter D2 of the means 20 measured at the foot of the blade.
  • a value between approximately a quarter and a quarter is adopted for the radius ⁇ 2 of the arc 152 located on the blade 12 foot side.
  • the sickle-shaped configuration of the blade is such that the ratio of the lengths of the feet 12 and heads 13 of the blade, respectively, is of the order of about 0.4.
  • blades according to the invention and according to the prior art have geometries calculated according to conventional techniques so as to have similar aerodynamic performance with regard to the flow rates and the static pressure. Only the profiles of the leading and trailing edges change, curves according to the invention, rectilinear according to the prior art.
  • these propellers provide a flow of 1700 m3 / h with a static pressure of 15 mm of water column when the blade head diameter is 305 mm and the blade foot diameter 124 mm and when doing turn the conventional propeller at 2580 rpm and the propeller according to the invention at 2650 rpm.
  • These two propellers are associated with the same engine and the same vehicle radiator using support arms which have the same configuration.
  • Fig. 2 the sound pressure levels are analyzed in thirds of octaves and the overall noise level is represented weighted according to standard A.
  • the invention it has been possible to increase the axial distance which separates the trailing edge of the propeller blade from the fixed obstacles which constitute the support arms of the fan motor or the like and which generate noise.
  • the invention makes it possible to obtain a relatively low sound level by displacement of the frequency spectrum of the acoustic energy in the direction of the frequencies which correspond to a lower sensitivity of the human ear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (9)

1. Flügel (10) für ein Laufrad, insbesondere eines Kraftfahrzeugventilators, das gebildet wird durch eine zentrale Nabe (20), an der die Füße (12) der Flügel befestigt sind, wobei dieser Flügel eine Anströmkante (14) und eine Abströmkante (15) bildet, die beide gekrümmt und derart relativ zueinander angeordnet sind, daß sie dem Flügel eine sichelförmige Gestalt verleihen, und wobei diese sichelförmige Gestalt sich vom Fuß (12) zum Umfang verjüngt, dadurch gekennzeichnet, daß die jeweiligen Konkavitäten der gekrümmten Anströmkante (14) und Abströmkante (15) stromabwärts in Strömungsrichtung des Fluids gerichtet sind und daß die Abströmkante durch zwei Bögen (152, 153) gebildet wird, deren mittlere Krümmungsradien (ρ₂, ρ₃) voneinander verschieden sind, und die sich ohne Knickpunkt aneinander anschließen, dies in einer Projektion auf eine axial zur Nabe verlaufende Ebene.
2. Flügel nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens einer der Bögen (152, 153) ein Kreisbogen ist.
3. Flügel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß wenigstens einer der Bögen (152, 153) ein Kegelschnitt-Bogen ist.
4. Flügel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Flügelköpfe (13) an einem Umfangsring (30) befestigt sind.
5. Flügel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Längenverhältnis des Fußes (12) und Kopfes (13) des Flügels in der Größenordnung von etwa 0,4 liegt.
6. Flügel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der mittlere Krümmungsradius (ρ₂) des näher am Fuß (12) des Flügels gelegenen Bogens (152) kleiner ist als der mittlere Krümmungsradius (ρ₃) des näher am Kopf (13) des Flügels gelegenen Bogens (153).
7. Flügel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der mittlere Krümmungsradius (ρ₂) des näher am Fuß (12) des Flügels gelegenen Bogens (152) näherungsweise zwischen etwa einem Viertel und etwa einem Drittel des Durchmessers der Nabe (20) am Fuß (12) des Flügels liegt.
8. Flügel nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der mittlere Krümmungsradius (ρ₃) des näher am Kopf (13) des Flügels gelegenen Bogens (153) von der axialen Länge der Nabe (20) abhängig ist.
9. Verwendung eines Flügels nach einem der Ansprüche 1 bis 8 bei der Herstellung eines Laufrades für einen Autoventilator, insbesondere für einen Autokühler.
EP88401755A 1987-07-09 1988-07-05 Sichelförmiger Flügel für ein Laufrad und seine Anwendung bei Autoventilatoren Expired - Lifetime EP0298861B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8709773A FR2617904B1 (fr) 1987-07-09 1987-07-09 Pale falciforme pour helice et son application notamment aux motoventilateurs pour automobiles
FR8709773 1987-07-09

Publications (2)

Publication Number Publication Date
EP0298861A1 EP0298861A1 (de) 1989-01-11
EP0298861B1 true EP0298861B1 (de) 1991-05-15

Family

ID=9353039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401755A Expired - Lifetime EP0298861B1 (de) 1987-07-09 1988-07-05 Sichelförmiger Flügel für ein Laufrad und seine Anwendung bei Autoventilatoren

Country Status (8)

Country Link
US (1) US4871298A (de)
EP (1) EP0298861B1 (de)
JP (1) JPH0227199A (de)
KR (1) KR890002559A (de)
CA (1) CA1327553C (de)
DE (1) DE3862816D1 (de)
ES (1) ES2022999B3 (de)
FR (1) FR2617904B1 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4971520A (en) * 1989-08-11 1990-11-20 Airflow Research And Manufacturing Corporation High efficiency fan
DE4127134B4 (de) * 1991-08-15 2004-07-08 Papst Licensing Gmbh & Co. Kg Diagonallüfter
US5489186A (en) * 1991-08-30 1996-02-06 Airflow Research And Manufacturing Corp. Housing with recirculation control for use with banded axial-flow fans
DE69228189T2 (de) * 1991-08-30 1999-06-17 Airflow Research & Mfg. Corp., Watertown, Mass. Ventilator mit vorwärtsgekrümmten schaufeln und angepasster schaufelkrümmung und -anstellung
US5244347A (en) * 1991-10-11 1993-09-14 Siemens Automotive Limited High efficiency, low noise, axial flow fan
US5437541A (en) * 1993-12-30 1995-08-01 Vainrub; John Blade for axial fan
US5588804A (en) * 1994-11-18 1996-12-31 Itt Automotive Electrical Systems, Inc. High-lift airfoil with bulbous leading edge
US5624234A (en) * 1994-11-18 1997-04-29 Itt Automotive Electrical Systems, Inc. Fan blade with curved planform and high-lift airfoil having bulbous leading edge
CN2304777Y (zh) * 1997-05-28 1999-01-20 韩玮 轮式桨扇
US6595753B1 (en) * 1999-05-21 2003-07-22 A. Vortex Holding Company Vortex attractor
US6309178B1 (en) 1999-09-22 2001-10-30 Young S. Kim Downstream guiding device for fan-radiator cooling system
JP3473549B2 (ja) * 2000-04-28 2003-12-08 松下電器産業株式会社 送風機羽根車とその送風機羽根車を備えた空気調和機
AU2001273595A1 (en) * 2000-06-16 2001-12-24 Robert Bosch Corporation Automotive fan assembly with flared shroud and fan with conforming blade tips
JP4085948B2 (ja) * 2003-10-01 2008-05-14 株式会社デンソー 冷却ファンおよび送風機
US7331764B1 (en) 2004-04-19 2008-02-19 Vee Engineering, Inc. High-strength low-weight fan blade assembly
US20060076120A1 (en) * 2004-10-12 2006-04-13 Deere & Company, A Delaware Corporation Cooling system with pre-cleaning

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294688A1 (de) * 1987-06-03 1988-12-14 INDUSTRIE MAGNETI MARELLI S.r.l. Axialgebläserad für die Kühlung des Wärmeaustauschers des Kühlsystems eines Verbrennungsmotors für Fahrzeuge

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1228776A (en) * 1914-04-14 1917-06-05 Carl Alrik Hult Driving device for boats.
US1467227A (en) * 1921-09-02 1923-09-04 Robert Alfred Blake Air impeller or propeller
US4012172A (en) * 1975-09-10 1977-03-15 Avco Corporation Low noise blades for axial flow compressors
DE2555200C3 (de) * 1975-12-09 1979-01-04 Gutehoffnungshuette Sterkrade Ag, 4200 Oberhausen Axialverdichterschaufel mit einer nach rückwärts gepfeilten Vorderkante
US4131387A (en) * 1976-02-27 1978-12-26 General Electric Company Curved blade turbomachinery noise reduction
US4358245A (en) * 1980-09-18 1982-11-09 Bolt Beranek And Newman Inc. Low noise fan
JPS57140596A (en) * 1981-02-21 1982-08-31 Eiichi Sugiura Centrifugal pump
JPS5851435U (ja) * 1981-10-05 1983-04-07 東北金属工業株式会社 積層セラミツクコンデンサ
US4685513A (en) * 1981-11-24 1987-08-11 General Motors Corporation Engine cooling fan and fan shrouding arrangement
US4459087A (en) * 1982-06-02 1984-07-10 Aciers Et Outillage Peugeot Fan unit for an internal combustion engine of automobile vehicle
US4569632A (en) * 1983-11-08 1986-02-11 Airflow Research And Manufacturing Corp. Back-skewed fan
US4548548A (en) * 1984-05-23 1985-10-22 Airflow Research And Manufacturing Corp. Fan and housing
US4569631A (en) * 1984-08-06 1986-02-11 Airflow Research And Manufacturing Corp. High strength fan
IT206701Z2 (it) * 1985-08-02 1987-10-01 Gate Spa Ventilatore assiale particolarmente per autoveicoli

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294688A1 (de) * 1987-06-03 1988-12-14 INDUSTRIE MAGNETI MARELLI S.r.l. Axialgebläserad für die Kühlung des Wärmeaustauschers des Kühlsystems eines Verbrennungsmotors für Fahrzeuge

Also Published As

Publication number Publication date
US4871298A (en) 1989-10-03
ES2022999B3 (es) 1991-12-16
JPH0227199A (ja) 1990-01-29
FR2617904B1 (fr) 1992-05-22
FR2617904A1 (fr) 1989-01-13
KR890002559A (ko) 1989-04-10
DE3862816D1 (de) 1991-06-20
CA1327553C (en) 1994-03-08
EP0298861A1 (de) 1989-01-11

Similar Documents

Publication Publication Date Title
EP0298861B1 (de) Sichelförmiger Flügel für ein Laufrad und seine Anwendung bei Autoventilatoren
EP2622227B1 (de) Propeller für einen ventilator mit veränderbarer sehnenlänge
EP0260175B1 (de) Profilierter Propellerflügel und seine Anwendung in Motorventilatoren
FR2908152A1 (fr) Aube en fleche de turbomachine
CA2458417C (fr) Aube en fleche de turboreacteur
FR2726324A1 (fr) Ventilateur helicoide pour le radiateur d'un moteur a combustion interne
FR2685393A1 (fr) Ventilateur axial en particulier pour vehicule automobile.
FR2898943A1 (fr) Helice de ventilateur, en particulier pour vehicules automobiles
WO2018138439A1 (fr) Profil amélioré de bord d'attaque d'aubes
EP0541429B1 (de) Profilierte Lüfterdüse für Lüfter und ihre Anwendung in Kraftwagenmotorlüftern
FR2836186A1 (fr) Ventilateur a flux axial
EP1034376B1 (de) Lüfterrad
EP3271588A1 (de) Aerodynamisch und akustisch verbesserter fahrzeuglüfter
EP0265335B1 (de) Luftschrauben, insbesondere für Flugzeugvortriebsmittel
EP0242248A1 (de) Radiallüfter, insbesondere für die Klimaanlage eines Fahrzeugs
EP1152153B1 (de) Lüfter für ein Kraftfahrzeug mit Leitschaufeln
FR2833050A1 (fr) Ventilateur helicoide avec un moyen reducteur de bruit
FR2784421A1 (fr) Soufflerie axiale, en particulier pour vehicules a moteur
FR2588925A1 (fr) Ventilateur equipe de moyens pour reduire le bruit engendre par la rotation de ses pales
FR2772437A1 (fr) Groupe moto-ventilateur, notamment pour installation de chauffage-climatisation de vehicule automobile
FR2745439A1 (fr) Alternateur de vehicule automobile a ventilation interne muni d'un palier perfectionne
EP0219364A1 (de) Schiffsvortriebselemente, insbesondere Schrauben
FR2598184A1 (fr) Ventilateur axial
FR2723408A1 (fr) Ventilateur axial, en particulier pour une soufflante de refroidissement d'un moteur de vehicule automobile.
BE853153R (fr) Ventilateur peripherique axio-centrifuge pour machines electriques a ventilation superficielle

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES GB IT SE

17P Request for examination filed

Effective date: 19881202

17Q First examination report despatched

Effective date: 19900529

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB IT SE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3862816

Country of ref document: DE

Date of ref document: 19910620

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 88401755.9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960621

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960628

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19960711

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960716

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970705

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970706

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19970707

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970705

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980401

EUG Se: european patent has lapsed

Ref document number: 88401755.9

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20001102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050705