EP0541429A1 - Profiled shroud for a fan rotor and its use in motor driven fans for cars - Google Patents

Profiled shroud for a fan rotor and its use in motor driven fans for cars Download PDF

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Publication number
EP0541429A1
EP0541429A1 EP92402961A EP92402961A EP0541429A1 EP 0541429 A1 EP0541429 A1 EP 0541429A1 EP 92402961 A EP92402961 A EP 92402961A EP 92402961 A EP92402961 A EP 92402961A EP 0541429 A1 EP0541429 A1 EP 0541429A1
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EP
European Patent Office
Prior art keywords
ferrule
section
ferrule according
meridian cross
flange
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
EP92402961A
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German (de)
French (fr)
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EP0541429B1 (en
Inventor
Jean-Claude Vera
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ECIA Equipements et Composants pour lIndustrie Automobile SA
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ECIA Equipements et Composants pour lIndustrie Automobile SA
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    • 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
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/545—Ducts
    • F04D29/547—Ducts having a special shape in order to influence fluid flow
    • 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
    • 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

  • the present invention relates to fairing devices for propellers, in particular axial ones, for example for motorized fan units of automobiles.
  • the subject of the invention is a profiled annular ferrule for fan propeller blade heads having a curved inlet flange, the convexity of which is directed towards the axis.
  • This ferrule is characterized in that the flange has a given axial length and a meridian cross-section configured approximately as a quarter ellipse whose eccentricity is of the order of 1.5 and whose semi-major axis is between approximately a third and a half of this given axial length.
  • the subject of the invention is also the application of such a ferrule to the manufacture of a propeller for an automobile fan.
  • a profiled annular ferrule 10 is intended to be associated with the blades 20 of a fan propeller. More particularly, the ferrule 10 is intended to be fixed to the head 21 of each of the blades, the foot 22 of which is carried by a hub 30 intended to be driven by an axis shaft 100 of an electric motor, not shown. Each blade 20 also has a leading edge 23 and a trailing edge 24.
  • the profiled annular shell 10 has a curved inlet flange 11, the convexity of which is directed towards the axis 100 along which the propeller rotates normally and from which it is coaxial.
  • This flange 11 has a given axial length l and has a meridian cross section 110 configured approximately in the quarter of an ellipse.
  • the eccentricity e of this ellipse is defined, as it is classic, by the ratio of its semi-major axis and semi-minor axis a and b respectively, and is of the order of 1.5.
  • the length of the semi-major axis a of this ellipse is between approximately one third and one half of the given axial length l of the flange.
  • the flange 11 is preferably provided with a centrifugal front flange 12, as illustrated, whose angular amplitude ⁇ , measured from the center O of the ellipse from its major axis, does not exceed approximately 45 °.
  • this rim 12 has a curved meridian cross section 120 which is approximately elliptical or even circular.
  • the flange 11 is provided with a rear extension 13, which is delimited by an inner wall 131 facing the axis 100 and by an outer wall 132.
  • the inner wall 131 has a curved meridian cross section 1310, which is approximately elliptical or even circular.
  • the outer wall 132 has a rectilinear meridian cross section 1320 which is, for example parallel to the axis 100 of the annular shell. It is clear that the particular configurations specific to the inner 131 and outer 132 walls may not be adopted simultaneously
  • this ferrule 10 according to the invention is intended to rotate preferably in a fairing nozzle 40 which is fixed.
  • a fairing nozzle 40 is for example fixed on the front wall of a radiator for cooling a thermal engine of an automobile or of an exchanger of an air conditioner of the passenger compartment.
  • the thickness of the extension posterior 13 of the shell 10 is not constant, and will become thinner in the direction of the air flow, from upstream to downstream.
  • a profiled annular ferrule according to the invention was used, the given axial length l of which is 32 mm, the ellipse of which has a semi-major axis a of 12 mm, and a half small axis b of 8 mm, whose maximum diameter D e measured at the front edge is 284 mm, whose internal diameter D i is 260 mm and whose maximum thickness between the internal and external walls is 3 mm.
  • connections between the flange, the front edge and the posterior extension are made so as to form a continuous surface, preferably without any marked angular zone; these connections are by example obtained by arcs of a circle.
  • Such a ferrule can be made of metal or synthetic material. When the latter type of material is used, such a ferrule can then be molded in one piece with the blades and the hub of a propeller.

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

Abstract

La virole annulaire profilée (10) pour tête de pale d'hélice de ventilateur (20,21) présente une collerette d'entrée cintrée (11) dont la convexité est dirigée vers l'axe (100), et est caractérisée en ce que cette collerette (11) a une longueur (l) axiale donnée et une section droite méridienne (110) configurée approximativement en quart d'ellipse dont l'excentricité est de l'ordre de 1,5 et dont le demi-grand axe (a) est compris entre environ le tiers et la moitié de cette longueur axiale donnée (l). Application aux motoventilateurs de refroidissement des radiateurs d'automobile. <IMAGE>The profiled annular ferrule (10) for the fan propeller blade head (20, 21) has a curved inlet flange (11) whose convexity is directed towards the axis (100), and is characterized in that this flange (11) has a given axial length (l) and a meridian cross section (110) configured approximately as a quarter ellipse whose eccentricity is of the order of 1.5 and whose semi-major axis (a ) is between about a third and a half of this given axial length (l). Application to motor cooling fans of automobile radiators. <IMAGE>

Description

La présente invention concerne les dispositifs de carénage des hélices, notamment axiales par exemple pour groupes motoventilateurs d'automobile.The present invention relates to fairing devices for propellers, in particular axial ones, for example for motorized fan units of automobiles.

Divers profils de carénage ont déjà été proposés pour des viroles montées sur les têtes des pales d'hélice de ventilateur. Parmi ces profils, en section droite méridienne, se trouve l'arc de cercle qui confère à l'hélice une entrée évasée dans le carénage tournant ou virole, de façon à minimiser le décollement des filets d'air s'écoulant le long du profil du carénage.Various fairing profiles have already been proposed for ferrules mounted on the heads of the fan propeller blades. Among these profiles, in the meridian cross-section, is the arc of a circle which gives the propeller a flared entry in the rotating fairing or ferrule, so as to minimize the separation of the air streams flowing along the profile fairing.

Toutefois, il se forme habituellement au contournement de la collerette d'entrée d'une telle virole, un décollement, stationnaire ou non, des filets d'air de plus ou moins grande amplitude, qui provoque une dégradation des performances aérodynamiques des parties en tête de pales.However, it usually forms around the inlet flange of such a ferrule, detachment, stationary or not, of the air streams of greater or lesser amplitude, which causes a degradation of the aerodynamic performance of the leading parts of blades.

Un tel décollement entraîne la formation de tourbillons et interagit avec les couches fluides tapissant l'intrados et l'extrados des pales. Il en résulte des conditions d'écoulement particulièrement défavorables, tout spécialement dans la partie de tête des pales, qui introduisent :

  • une perte additionnelle de pression totale du fluide, à la traversée de l'hélice;
  • une augmentation perceptible du niveau sonore de fonctionnement de l'installation.
Such detachment leads to the formation of vortices and interacts with the fluid layers lining the lower surface and upper surface of the blades. This results in particularly unfavorable flow conditions, especially in the head portion of the blades, which introduce:
  • an additional loss of total fluid pressure, when crossing the propeller;
  • a noticeable increase in the operating sound level of the installation.

Des exemples de solution selon la technique antérieure sont illustrés par le document US 3 937 192. On observera en particulier qu'une telle solution impose un jeu ou écart important, de l'ordre d'une vingtaine de millimètres, entre la paroi extérieure de la virole annulaire tournante raccordée aux têtes des pales, et la paroi intérieure du carénage fixe ou buses, qui lui fait face.Examples of solution according to the prior art are illustrated by document US 3,937,192. It will be observed in particular that such a solution requires a large clearance or gap, of the order of about twenty millimeters, between the outer wall of the rotating annular ferrule connected to the heads of the blades, and the inner wall of the fixed fairing or nozzles, which makes it face.

Toutefois, cette solution ne convient pas pour obtenir une réelle augmentation des performances des hélices.However, this solution is not suitable for obtaining a real increase in the performance of the propellers.

L'invention a pour objet une virole annulaire profilée pour têtes de pales d'hélice de ventilateur présentant une collerette d'entrée cintrée dont la convexité est dirigée vers l'axe. Cette virole est caractérisée en ce que la collerette a une longueur axiale donnée et une section droite méridienne configurée approximativement en quart d'ellipse dont l'excentricité est de l'ordre de 1,5 et dont le demi-grand axe est compris entre environ le tiers et la moitié de cette longueur axiale donnée.The subject of the invention is a profiled annular ferrule for fan propeller blade heads having a curved inlet flange, the convexity of which is directed towards the axis. This ferrule is characterized in that the flange has a given axial length and a meridian cross-section configured approximately as a quarter ellipse whose eccentricity is of the order of 1.5 and whose semi-major axis is between approximately a third and a half of this given axial length.

L'invention a aussi pour objet l'application d'une telle virole à la confection d'hélice pour motoventilateur d'automobile.The subject of the invention is also the application of such a ferrule to the manufacture of a propeller for an automobile fan.

D'autres caractéristiques de l'invention ressortiront de la lecture de la description et des revendications qui suivent, ainsi que de l'examen du dessin annexé, donné seulement à titre d'exemple, où :

  • la Figure 1 est une vue partielle schématique d'un mode de réalisation d'une virole selon l'invention;
  • les Figures 2A, 2B, 2C sont des sections méridiennes de détail, partielles de variantes d'exécution d'une virole selon l'invention;
  • la Figure 3 illustre des graphes comparatifs des pressions et des rendements, en fonction du débit, pour une hélice équipée d'une virole traditionnelle (trait mixte) et une hélice équipée d'une virole selon l'invention (traits fort); et
  • la Figure 4 est un graphe illustrant le résultat de l'analyse harmonique normalisée, au tiers d'octave en classe A, du bruit rayonné par une hélice équipée d'une virole traditionnelle (trait fin) et une hélice équipée d'une virole selon l'invention (trait fort).
Other characteristics of the invention will emerge from reading the description and the claims which follow, as well as from examining the appended drawing, given only by way of example, where:
  • Figure 1 is a schematic partial view of an embodiment of a ferrule according to the invention;
  • FIGS. 2A, 2B, 2C are detail meridian sections, partial of variant embodiments of a ferrule according to the invention;
  • FIG. 3 illustrates comparative graphs of the pressures and of the yields, as a function of the flow rate, for a propeller equipped with a traditional ferrule (mixed line) and a propeller equipped with a ferrule according to the invention (strong lines); and
  • Figure 4 is a graph illustrating the result of the normalized harmonic analysis, to the third of an octave in class A, of the noise radiated by a propeller equipped with a traditional ferrule (thin line) and a propeller equipped with a ferrule according to the invention (strong line).

Les hélices de ventilateur, et tout spécialement celles des motoventilateurs d'automobile, étant bien connues dans la technique, on ne décrira dans ce qui suit que ce qui concerne directement ou indirectement l'invention. Pour le surplus, le spécialiste de la technique considérée puisera dans les solutions classiques courantes à sa disposition pour faire face aux problèmes particuliers auxquels il est confronté.Since the fan propellers, and especially those of automobile motor fans, are well known in the art, the following will only describe what relates directly or indirectly to the invention. For the rest, the specialist in the technique considered will draw on the current conventional solutions at his disposal to deal with the particular problems with which he is confronted.

Dans ce qui suit, un même numéro de référence identifie toujours un même élément homologue, quel que soit le mode de réalisation ou sa variante d'exécution.In what follows, the same reference number always identifies the same homologous element, whatever the embodiment or its variant of execution.

Pour la commodité de l'exposé, on décrira successivement les divers constituants d'une virole annulaire profilée suivant l'invention avant d'en exposer son fonctionnement et sa fabrication.For the convenience of the description, the various constituents of a profiled annular shell according to the invention will be described successively before explaining its operation and manufacture.

Comme on le voit, une virole 10 annulaire profilée selon l'invention, est destinée à être associée aux pales 20 d'une hélice de ventilateur. Plus particulièrement, la virole 10 est destinée à être fixée à la tête 21 de chacune des pales dont le pied 22 est porté par un moyeu 30 destiné à être entraîné par un arbre d'axe 100 d'un moteur électrique, non représenté. Chaque pale 20 présente aussi un bord d'attaque 23 et un bord de fuite 24.As can be seen, a profiled annular ferrule 10 according to the invention is intended to be associated with the blades 20 of a fan propeller. More particularly, the ferrule 10 is intended to be fixed to the head 21 of each of the blades, the foot 22 of which is carried by a hub 30 intended to be driven by an axis shaft 100 of an electric motor, not shown. Each blade 20 also has a leading edge 23 and a trailing edge 24.

Comme on le voit, la virole annulaire profilée 10 présente une collerette 11 d'entrée cintrée, dont la convexité est dirigée vers l'axe 100 suivant lequel l'hélice tourne normalement et duquel elle est coaxiale. Cette collerette 11 a une longueur l axiale donnée et a une section droite méridienne 110 configurée approximativement en quart d'ellipse. L'excentricité e de cette ellipse est définie, comme il est classique, par le rapport de ses demi-grand axe et demi-petit axe a et b respectivement, et est de l'ordre de 1,5. La longueur du demi-grand axe a de cette ellipse est comprise entre environ le tiers et la moitié de la longueur axiale donnée l de la collerette.As can be seen, the profiled annular shell 10 has a curved inlet flange 11, the convexity of which is directed towards the axis 100 along which the propeller rotates normally and from which it is coaxial. This flange 11 has a given axial length l and has a meridian cross section 110 configured approximately in the quarter of an ellipse. The eccentricity e of this ellipse is defined, as it is classic, by the ratio of its semi-major axis and semi-minor axis a and b respectively, and is of the order of 1.5. The length of the semi-major axis a of this ellipse is between approximately one third and one half of the given axial length l of the flange.

Comme on peut l'observer, le grand axe de cette ellipse est parallèle à l'axe 100 de la virole annulaire 10.As can be observed, the major axis of this ellipse is parallel to the axis 100 of the annular shell 10.

La collerette 11 est munie de préférence d'un rebord 12 frontal centrifuge, comme illustré, dont l'amplitude angulaire ϑ, mesurée du centre O de l'ellipse à partir de son grand axe, n'excède pas environ 45°. De préférence, ce rebord 12 a une section droite méridienne 120 courbe qui est approximativement elliptique voire circulaire.The flange 11 is preferably provided with a centrifugal front flange 12, as illustrated, whose angular amplitude ϑ, measured from the center O of the ellipse from its major axis, does not exceed approximately 45 °. Preferably, this rim 12 has a curved meridian cross section 120 which is approximately elliptical or even circular.

S'il y a lieu, la collerette 11 est munie d'un prolongement 13, postérieur, qui est délimité par une paroi intérieure 131 faisant face à l'axe 100 et par une paroi extérieure 132. De préférence, la paroi intérieure 131 a une section droite méridienne 1310 courbe, qui est approximativement elliptique voire circulaire. De préférence, la paroi extérieure 132 a une section droite méridienne 1320 rectiligne qui est, par exemple parallèle à l'axe 100 de la virole annulaire. Il est clair que les configurations particulières propres aux parois intérieure 131 et extérieure 132 peuvent ne pas être adoptées simultanémentIf necessary, the flange 11 is provided with a rear extension 13, which is delimited by an inner wall 131 facing the axis 100 and by an outer wall 132. Preferably, the inner wall 131 has a curved meridian cross section 1310, which is approximately elliptical or even circular. Preferably, the outer wall 132 has a rectilinear meridian cross section 1320 which is, for example parallel to the axis 100 of the annular shell. It is clear that the particular configurations specific to the inner 131 and outer 132 walls may not be adopted simultaneously

Comme il est classique, cette virole 10 selon l'invention est destinée à tourner de préférence dans une buse 40 de carénage qui est fixe. Une telle buse est par exemple fixée sur la paroi antérieure d'un radiateur de refroidissement d'un moteur thermique d'automobile ou d'un échangeur d'un climatiseur de l'habitacle.As is conventional, this ferrule 10 according to the invention is intended to rotate preferably in a fairing nozzle 40 which is fixed. Such a nozzle is for example fixed on the front wall of a radiator for cooling a thermal engine of an automobile or of an exchanger of an air conditioner of the passenger compartment.

Comme on peut l'observer en particulier sur les Figures 2B et 2C, l'épaisseur du prolongement postérieur 13 de la virole 10 n'est pas constante, et va s'amincissant dans le sens du flux d'air, de l'amont vers l'aval.As can be seen in particular in Figures 2B and 2C, the thickness of the extension posterior 13 of the shell 10 is not constant, and will become thinner in the direction of the air flow, from upstream to downstream.

Pour les exemples comparatifs de performance qui suivent, on a utilisé une virole annulaire profilée selon l'invention dont la longueur axiale donnée l est de 32 mm, dont l'ellipse a un demi-grand axe a de 12 mm, et un demi-petit axe b de 8 mm, dont le diamètre maximal De mesuré au rebord frontal est de 284 mm, dont le diamètre Di intérieur est de 260 mm et dont l'épaisseur maximale entre les parois intérieure et extérieure est de 3 mm.For the following comparative performance examples, a profiled annular ferrule according to the invention was used, the given axial length l of which is 32 mm, the ellipse of which has a semi-major axis a of 12 mm, and a half small axis b of 8 mm, whose maximum diameter D e measured at the front edge is 284 mm, whose internal diameter D i is 260 mm and whose maximum thickness between the internal and external walls is 3 mm.

L'examen des graphes indique clairement qu'une hélice équipée d'une virole selon l'invention améliore les rendements aéraulique tout en maintenant voire réduisant le niveau sonore du bruit dans les conditions normales de fonctionnement. Cette analyse harmonique au tiers d'octave, en pondération A, est conduite selon le protocole d'essais classique en la matière, côté aspiration, en chambre sourde et en champ libre c'est-à-dire que l'hélice pourvue de sa virole selon l'invention et placée dans son carénage fixe ou buse, est seule étudiée lorsqu'elle tourne à 2300 t/min (voir Figure 4). Sur les graphes de la Figure 3, on a porté en abscisses le débit Q et en ordonnées le rendement η exprimé en pourcentage et la différence de pression Δp statique, entre amont et aval, exprimée en millimètre d'eau, la plage de fonctionnement est indiquée en trait fort sur l'axe des abscisses.Examination of the graphs clearly indicates that a propeller fitted with a ferrule according to the invention improves the air flow efficiency while maintaining or even reducing the noise level of the noise under normal operating conditions. This third-octave harmonic analysis, in A-weighting, is carried out according to the conventional test protocol in the matter, suction side, in a deaf chamber and in free field, that is to say that the propeller provided with its ferrule according to the invention and placed in its fixed fairing or nozzle, is the only one studied when it rotates at 2300 rpm (see Figure 4). On the graphs of Figure 3, we have plotted on the abscissa the flow rate Q and on the ordinate the efficiency η expressed in percentage and the static pressure difference Δp, between upstream and downstream, expressed in millimeters of water, the operating range is indicated in strong lines on the abscissa axis.

Il est clair que la configuration ellipsoïdale peut être approchée par une configuration circulaire osculatrice. De même, les raccordements entre collerette, rebord frontal et prolongement postérieur sont faits de manière à former une surface continue, de préférence sans zone anguleuse marquée; ces raccordements sont par exemple obtenus par des arcs de cercle.It is clear that the ellipsoidal configuration can be approached by a circular osculative configuration. Likewise, the connections between the flange, the front edge and the posterior extension are made so as to form a continuous surface, preferably without any marked angular zone; these connections are by example obtained by arcs of a circle.

Une telle virole peut être fabriquée en métal ou en matériau synthétique. Lorsqu'on utilise ce dernier type de matériau, une telle virole peut alors être moulée d'un seul tenant avec les pales et le moyeu d'une hélice.Such a ferrule can be made of metal or synthetic material. When the latter type of material is used, such a ferrule can then be molded in one piece with the blades and the hub of a propeller.

Ce qui précède montre tout l'intérêt et les avantages apportés par l'invention tout spécialement lorsqu'une virole selon l'invention fait partie d'une hélice pour motoventilateur d'automobile.The above shows all the interest and the advantages brought by the invention especially when a ferrule according to the invention forms part of a propeller for motorized fan of automobile.

Claims (11)

1 - Virole annulaire profilée pour tête de pale d'hélice de ventilateur présentant une collerette d'entrée cintrée dont la convexité est dirigée vers l'axe (100), caractérisée en ce que cette collerette (11) a une longueur (l) axiale donnée et une section droite méridienne (110) configurée approximativement en quart d'ellipse dont l'excentricité est de l'ordre de 1,5 et dont le demi-grand axe (a) est compris entre environ le tiers et la moitié de cette longueur axiale donnée (l). 1 - Profiled annular ferrule for a fan propeller blade head having a curved inlet flange, the convexity of which is directed towards the axis (100), characterized in that this flange (11) has an axial length ( l ) given and a meridian cross section (110) configured approximately as a quarter ellipse whose eccentricity is of the order of 1.5 and whose semi-major axis (a) is between approximately one third and half of this given axial length ( l ). 2 - Virole selon la revendication 1, caractérisée en ce que le grand axe (2a) de l'ellipse est parallèle à l'axe (100) de la virole annulaire (10). 2 - Ferrule according to claim 1, characterized in that the major axis (2a) of the ellipse is parallel to the axis (100) of the annular ferrule (10). 3 - Virole selon la revendication 1 ou 2, caractérisée en ce que la collerette (11) est munie d'un rebord (12) frontal centrifuge dont l'amplitude angulaire (ϑ) mesurée du centre (O) de l'ellipse à partir de son grand axe (2a) n'excède pas environ 45°. 3 - Ferrule according to claim 1 or 2, characterized in that the flange (11) is provided with a centrifugal front flange (12) whose angular amplitude (ϑ) measured from the center (O) of the ellipse from of its major axis (2a) does not exceed approximately 45 °. 4 - Virole selon la revendication 3, caractérisée en ce que ce rebord (12) a une section droite méridienne (120) courbe. 4 - Ferrule according to claim 3, characterized in that this rim (12) has a meridian cross section (120) curved. 5 - Virole selon la revendication 4, caractérisée en ce que la section droite méridienne (120) du rebord (12) est approximativement elliptique voire circulaire. 5 - Ferrule according to claim 4, characterized in that the meridian cross section (120) of the flange (12) is approximately elliptical or even circular. 6 - Virole selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la collerette (11) est munie d'un prolongement (13) postérieur. 6 - Ferrule according to any one of claims 1 to 5, characterized in that the collar (11) is provided with a rear extension (13). 7 - Virole selon la revendication 6, caractérisée en ce que le prolongement postérieur (13) a une paroi intérieure (131) à section droite méridienne (1310) courbe. 7 - Ferrule according to claim 6, characterized in that the posterior extension (13) has an inner wall (131) with a meridian cross section (1310) curved. 8 - Virole selon la revendication 7, caractérisée en ce que la section droite méridienne (1310) courbe de la paroi intérieure (131) du prolongement (13) est approximativement elliptique voire circulaire. 8 - ferrule according to claim 7, characterized in that the meridian cross section (1310) curve of the inner wall (131) of the extension (13) is approximately elliptical or even circular. 9 - Virole selon l'une quelconque des revendications 6 à 8, caractérisée en ce que le prolongement postérieur (13) a une paroi extérieure (132) à section droite méridienne (1320) rectiligne. 9 - Ferrule according to any one of claims 6 to 8, characterized in that the posterior extension (13) has an outer wall (132) with meridian cross section (1320) rectilinear. 10 - Virole selon la revendications 9, caractérisée en ce que la section droite méridienne (1320) rectiligne de la paroi extérieure (132) du prolongement (13) est parallèle à l'axe (100) de la virole annulaire (10). 10 - Ferrule according to claim 9, characterized in that the meridian cross section (1320) rectilinear of the outer wall (132) of the extension (13) is parallel to the axis (100) of the annular ferrule (10). 11 - Application d'une virole selon l'une quelconque des revendications 1 à 10 à la confection d'hélices pour motoventilateurs d'automobile. 11 - Application of a ferrule according to any one of claims 1 to 10 to the manufacture of propellers for motor fans.
EP92402961A 1991-11-07 1992-11-02 Profiled shroud for a fan rotor and its use in motor driven fans for cars Expired - Lifetime EP0541429B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR919113754A FR2683598B1 (en) 1991-11-07 1991-11-07 PROFILED ANNULAR SHEET FOR FAN PROPELLER AND ITS APPLICATION TO MOTOR FAN MOTORS.
FR9113754 1991-11-07

Publications (2)

Publication Number Publication Date
EP0541429A1 true EP0541429A1 (en) 1993-05-12
EP0541429B1 EP0541429B1 (en) 1997-04-09

Family

ID=9418725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402961A Expired - Lifetime EP0541429B1 (en) 1991-11-07 1992-11-02 Profiled shroud for a fan rotor and its use in motor driven fans for cars

Country Status (4)

Country Link
US (1) US5249927A (en)
EP (1) EP0541429B1 (en)
DE (1) DE69218885T2 (en)
FR (1) FR2683598B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881394A2 (en) * 1997-05-30 1998-12-02 Hewlett-Packard Company Fan with blades having integral rotating venturi
GB2346654A (en) * 1998-12-28 2000-08-16 Inst Francais Du Petrole Two-phase helical mixed flow impeller with curved fairing
WO2009062292A1 (en) * 2007-11-12 2009-05-22 Brose Fahrzeugteile Gmbh & Co. Kommandditgesellschaft, Wurzburg Ingested turbulence suppression rim structure for axial flow fan
FR2942508A1 (en) * 2009-02-25 2010-08-27 Jean Louis Lariepe Blade for horizontal axis type wind turbine, has trajectories represented in layout depicting movement of air along horizontal axis based on distance traveled by point of blade tip or point of blade foot

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5478201A (en) * 1994-06-13 1995-12-26 Carrier Corporation Centrifugal fan inlet orifice and impeller assembly
US5851105A (en) * 1995-06-28 1998-12-22 General Electric Company Tapered strut frame
US6042335A (en) * 1998-05-04 2000-03-28 Carrier Corporation Centrifugal flow fan and fan/orifice assembly
EP1290349B1 (en) 2000-06-16 2006-08-16 Robert Bosch Corporation Automotive fan assembly with flared shroud and fan with conforming blade tips
US20030228234A1 (en) * 2002-06-06 2003-12-11 Sunonwealth Electric Machine Industry Co., Ltd. Axial flow fan structure
DE102011105451A1 (en) 2011-06-22 2012-12-27 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Fan of a motor vehicle
KR20140131750A (en) * 2013-05-06 2014-11-14 엘지전자 주식회사 Centrifugal Fan
EP2829733B1 (en) 2013-05-10 2021-01-27 Lg Electronics Inc. Centrifugal fan
KR101677030B1 (en) 2013-05-10 2016-11-17 엘지전자 주식회사 Centrifugal fan
ITTO20130806A1 (en) * 2013-10-04 2015-04-05 Johnson Electric Asti S R L VENTILATION GROUP, PARTICULARLY FOR A HEAT EXCHANGER OF A MOTOR VEHICLE

Citations (4)

* 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
US3937192A (en) * 1974-09-03 1976-02-10 General Motors Corporation Ejector fan shroud arrangement
DE2703352A1 (en) * 1977-01-27 1978-08-03 Siemens Ag Electric motor ventilation system - has impeller covered by radial hood and ring connected to ends of impeller blades (SW 23.5.78)
EP0267725A2 (en) * 1986-11-14 1988-05-18 Seiko Electronic Components Ltd. Axial flow fan

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213426A (en) * 1978-11-09 1980-07-22 General Motors Corporation Shrouding for engine mounted cooling fan
US4329946A (en) * 1979-10-09 1982-05-18 General Motors Corporation Shroud arrangement for engine cooling fan
JPS6021518Y2 (en) * 1980-03-07 1985-06-26 アイシン精機株式会社 Fan for internal combustion engine cooling system
US4685513A (en) * 1981-11-24 1987-08-11 General Motors Corporation Engine cooling fan and fan shrouding arrangement
US4548548A (en) * 1984-05-23 1985-10-22 Airflow Research And Manufacturing Corp. Fan and housing
US4781298A (en) * 1986-10-07 1988-11-01 Engelhard Corporation Process for beneficiating clay at high solids
DE3832026A1 (en) * 1988-09-21 1990-03-22 Bosch Gmbh Robert FAN WHEEL
US5248224A (en) * 1990-12-14 1993-09-28 Carrier Corporation Orificed shroud for axial flow fan
US5183382A (en) * 1991-09-03 1993-02-02 Caterpillar Inc. Low noise rotating fan and shroud assembly

Patent Citations (4)

* 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
US3937192A (en) * 1974-09-03 1976-02-10 General Motors Corporation Ejector fan shroud arrangement
DE2703352A1 (en) * 1977-01-27 1978-08-03 Siemens Ag Electric motor ventilation system - has impeller covered by radial hood and ring connected to ends of impeller blades (SW 23.5.78)
EP0267725A2 (en) * 1986-11-14 1988-05-18 Seiko Electronic Components Ltd. Axial flow fan

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0881394A2 (en) * 1997-05-30 1998-12-02 Hewlett-Packard Company Fan with blades having integral rotating venturi
EP0881394A3 (en) * 1997-05-30 1999-08-25 Hewlett-Packard Company Fan with blades having integral rotating venturi
GB2346654A (en) * 1998-12-28 2000-08-16 Inst Francais Du Petrole Two-phase helical mixed flow impeller with curved fairing
GB2346654B (en) * 1998-12-28 2002-11-13 Inst Francais Du Petrole Two-phase helical mixed flow impeller with curved fairing
WO2009062292A1 (en) * 2007-11-12 2009-05-22 Brose Fahrzeugteile Gmbh & Co. Kommandditgesellschaft, Wurzburg Ingested turbulence suppression rim structure for axial flow fan
FR2942508A1 (en) * 2009-02-25 2010-08-27 Jean Louis Lariepe Blade for horizontal axis type wind turbine, has trajectories represented in layout depicting movement of air along horizontal axis based on distance traveled by point of blade tip or point of blade foot

Also Published As

Publication number Publication date
DE69218885D1 (en) 1997-05-15
DE69218885T2 (en) 1997-09-04
EP0541429B1 (en) 1997-04-09
FR2683598A1 (en) 1993-05-14
FR2683598B1 (en) 1994-03-04
US5249927A (en) 1993-10-05

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