EP2839165B1 - Kraftfahrzeuggebläse mit reduzierter achsengrösse - Google Patents

Kraftfahrzeuggebläse mit reduzierter achsengrösse Download PDF

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Publication number
EP2839165B1
EP2839165B1 EP13711432.8A EP13711432A EP2839165B1 EP 2839165 B1 EP2839165 B1 EP 2839165B1 EP 13711432 A EP13711432 A EP 13711432A EP 2839165 B1 EP2839165 B1 EP 2839165B1
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EP
European Patent Office
Prior art keywords
wall
upstream
front wall
fan according
blades
Prior art date
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Active
Application number
EP13711432.8A
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English (en)
French (fr)
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EP2839165A1 (de
Inventor
Denis SCOUARNEC
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.)
Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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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
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • 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
    • F01P1/00—Air cooling
    • 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

Definitions

  • the field of the present invention is that of the automobile, and more particularly that of air circulation for cooling vehicle equipment, and in particular its engine.
  • Thermal engine vehicles need to evacuate the calories generated by their operation and they are therefore equipped with heat exchangers, in particular cooling radiators, which are placed at the front of the vehicle and which are crossed by outside air.
  • heat exchangers in particular cooling radiators, which are placed at the front of the vehicle and which are crossed by outside air.
  • a fan is placed upstream or downstream thereof, upstream or downstream being assessed in this document with reference to the flow direction of the air.
  • the propeller which serves to force the air circulation is characterized by a high flow rate and low pressure and has a very axially oriented flow.
  • the fan generally comprises a nozzle or base, of parallelepiped shape, which is crossed at its center by a hollow cylindrical cavity in which the propeller is positioned.
  • This base ensures the attachment of the fan to a support, in particular the cooling radiator or the frame, as well as the support of the electric motor for actuating the propeller and the maintenance of the axis around which the latter rotates.
  • aerodynamically it forms a frontal obstacle for the air flow, which forces it to move towards the propeller.
  • the propeller In the fans of the prior art, the propeller is flush with and / or is driven axially, downstream, with respect to the frontal plane of the support, as can be seen in the figures. figures 1 to 3 .
  • the propeller is configured so that the air which circulates on the upstream face of the front wall of this support crosses a difference in level by flowing into the propeller. It then follows a plunging path towards the propeller, which is favorable to its mixing with the main air flow which, for its part, arrives in a purely axial direction.
  • This configuration has, on the other hand, the drawback of too great an axial extension for the fan, the side walls of the base extending upstream from this frontal plane, which is therefore located at a position axially more upstream than the plane. upstream of the propeller.
  • it is important to optimize the axial size of the fan, without however degrading its aerodynamic performance.
  • the object of the present invention is to remedy these drawbacks by proposing an improved fan with minimum axial size.
  • the invention relates to a fan for a motor vehicle according to claim 1 comprising a propeller formed from several blades and a propeller support base, said propeller being rotated about an axis of rotation, said propeller base comprising an upstream front wall facing the ventilation air flow and extending outwardly in a radial plane with reference to said axis, and an outer wall extending axially from said front wall.
  • said front wall has a protuberance bordering the helix, said protuberance extending axially upstream with respect to the plane of said front wall, and the upstream end of which is located further upstream than the end.
  • said front wall is positioned axially in the same plane as said upstream end of the blades and / or of the ferrule, and said protuberance has the shape of a rib of revolution entirely located radially outside the outer end of the blades or of the shell and attached to the axial wall of said cylindrical cavity.
  • the invention also relates to a motor vehicle cooling module comprising a fan as described above.
  • a cooling module of a motor vehicle engine block is an assembly comprising in particular a fan and a heat exchanger such as a cooling radiator.
  • a fan 1 for which a propeller is inserted in a hollow cylindrical cavity placed in the center of a base 2 of parallelepiped shape.
  • the base has a substantially planar front wall 22 facing the flow of ventilation air and an outer wall 23 which surrounds the front wall 22 and which forms a duct for conveying air into the fan 1.
  • the propeller of the fan comprises a series of blades 3 which are attached at their central end to a hub 4 and, here, at their peripheral end to a circular ferrule 5.
  • the fan 1 rotates around a central axis 6 driven by a means of 'actuation, in particular an electric motor 7 (visible on the figure 2 ).
  • stator vanes 8 positioned downstream of the blades 3, the object of which is to serve as a support for the electric motor 7 and to guide the air flow at the outlet of the fan.
  • the Coanda effect consists of an attraction of a jet of fluid by a wall when it circulates near it. It is generally used to produce a deviation in the orientation of the jet, by choosing a curved wall as the wall, which is the case here with the quarter-torus shape of the ring 9.
  • the shell 5, in radial section has been given an L-shape, the axial branch of which forms the support for the ends of the blades 3 and the radial branch of which covers the cylindrical part, radially. innermost 21, of the support 2.
  • This internal radial part 21 forms the cylindrical cavity in which is positioned the propeller.
  • the support 2 has consequently been modified with the introduction of a shoulder formed by an L-shaped cutout between its internal radial part 21 and its front wall 22.
  • This L-shaped cutout has a first radial wall 26, which is parallel to the radial branch of the shell 5, and an axial wall 25 which faces this end of the radial branch of the shell and which is connected to the front wall 22 of the base.
  • the outer wall 23 which extends axially and which forms a duct for the delivery of air into the fan. Axially, this outer wall 23 extends from the front wall 22, over a length which is determined by considerations of the mechanical strength of the assembly and which cannot be reduced without adverse consequences.
  • the figure 4 shows a fan.
  • the front wall 22 of the base 2 is not flat, as is the case in the prior art, but it has, at its internal radial end, a protuberance in the form of a lip 24, which extends towards the upstream from the front wall 22 and which connects, in an axial direction, to the axial wall 25 of the L-shaped cutout of the support 2.
  • the front wall 22 of the support 2 is in a less advanced position towards upstream with respect to the upstream face of the ferrule 5, than in the prior art.
  • the outer wall 23, which extends from this front wall and which may have the same axial extension as in the prior art, is itself also less advanced axially with respect to the upstream face of the hub 4 or of the ferrule 5.
  • the axial size d of the fan is thus reduced.
  • the figure 5 shows, in a simplified manner, a first variant of the fan.
  • the lip 24 bends, going from the periphery towards the inside, with a shape whose slope evolves continuously, without breaking, before joining the axial wall 25 in an axial direction while being tangent to it. this.
  • the axial position of the front wall 22 is unchanged with respect to the first variant, so as to keep the gain obtained on the overall axial size d.
  • the lip 24 has a break in its slope with a right angle at its connection with the axial wall 25 of the L-shaped cutout. The slope of the The lip thus evolves continuously until it reaches a radial orientation, precisely where the lip connects to the axial wall 25.
  • the air which runs along the front part undergoes a Coanda effect associated with the curved shape of the lip 24 and is directed more axially when it arrives at the end of the blades 3, which facilitates its mixing with the flow of air. main air flowing through them.
  • the second variant promotes, for its part, the return of the circulating air at the end of the blades to the main flow, by injecting the flow circulating along the front wall 22 in a radial direction, above the recirculation circuit. .
  • the figures 7 and 8 show, for their part, two variants of an embodiment of the invention.
  • the lip 24 is extended, at its most upstream part, towards the interior of the fan, so that it overflows and covers the outer radial end of the ferrule 5.
  • the figure 7 shows the first variant with, as before, a rounded top which bends, coming inward, in the direction of the axial direction. Beyond this apex, the lip 24 ends in a cusp, from which it returns outwardly heading downstream, to join the axial wall 25 of the L-shaped cutout in an axial orientation. This rounded shape enables the air flow which circulates along the front wall 22 to benefit from the Coanda effect and straightens it in a more axial direction.
  • the figure 8 shows the second variant of the mode, with, as above, a radial orientation at the top of the lip. Likewise, the latter has a cusp and returns to the outside while moving downstream, to join the axial wall 25 of the L-shaped cutout in an axial orientation.
  • This second variant also promotes the return, towards the main flow, of the circulating air at the end of the blades, by injecting the flow which circulates along the front wall 22 in a radial direction, above the circuit. recirculation.
  • the front wall 22 is positioned axially in the same plane as said upstream end of the blades 3 and / or of the ferrule 5.
  • figure 9 it can also be located downstream. It is shown here with an outgrowth identical to that of the figure 5 but it could of course be an outgrowth of different shapes such as those illustrated in figures 6 to 8 .
  • the principle of the invention therefore consists, compared with the prior art, in reducing the axial bulk of the fan by shifting the front wall 22 downstream, and more particularly its upstream face, forming the front face of the parallelepipedic support 2. , all while keeping the same length for the outer wall 23.
  • a lip 24 is introduced at the inner radial end of this front wall 22.
  • This lip has the shape of a rib, for example rounded circular, which extends axially upstream above the front wall 22 and which here is connected in an axial orientation, to the axial wall 25 facing the shell 5.
  • the lip 24 extends above the outer radial end of the shell 5, thus forming a guide duct for the recirculation flow which circulates between the shell 5 and the axial wall 25 of the support 2. It also acts as a separator between the recirculation flows and the flow circulating on the front wall 22 before it is injected into the main flow which passes through the blades 3.
  • These guides are plates oriented essentially radially, which extend from the inner circle to the lip 24 and which have, on the side opposite to this circle, an edge either diagonal or curved opposite the end of the ferrule 5.

Claims (12)

  1. Kraftfahrzeuggebläse, umfassend eine aus mehreren Flügeln (3) ausgebildete Schraube und einen Schraubenstützsockel (2), wobei die Schraube um eine Drehachse (6) gedreht wird, wobei der Sockel eine stromaufwärtige vordere Wand (22) aufweist, die dem Gebläseluftstrom zugewandt ist und sich in einer radialen Ebene in Bezug auf die Achse außen erstreckt, und eine äußere Wand (23), die sich axial von der vorderen Wand erstreckt, wobei die vordere Wand (22) einen die Schraube umgrenzenden Vorsprung (24) aufweist,
    wobei sich der Vorsprung axial stromaufwärts in Bezug auf die Ebene der vorderen Wand erstreckt, und sich sein stromaufwärtiges Ende weiter stromaufwärts als das stromaufwärtige Ende der Flügel (3) der Schraube erstreckt, wobei die Flügel (3) außen auf einem Ring (5) verbunden sind,
    und wobei der Vorsprung die Form einer Umdrehungsrippe (24) aufweist, die sich bis zu einem radialen inneren Ende erstreckt, das radial innerhalb des äußeren Endes der Flügel (3) oder des Rings (5) positioniert ist,
    dadurch gekennzeichnet, dass die vordere Wand axial in derselben Ebene wie das stromaufwärtige Ende der Flügel und/oder des Rings positioniert ist.
  2. Gebläse nach Anspruch 1, wobei der Vorsprung kreisförmig ist und die Schraube umgibt.
  3. Gebläse nach einem der Ansprüche 1 oder 2, wobei die vordere Wand (22) axial stromabwärts des stromaufwärtigen Endes der Flügel (3) und/oder des Rings (5) positioniert ist.
  4. Gebläse nach Anspruch 3, wobei die Schraube innerhalb eines hohlen zylindrischen Hohlraums mit derselben Achse positioniert ist, der durch eine am Sockel (2) befestigte axiale Wand (25) ausgebildet ist.
  5. Gebläse nach Anspruch 4, wobei der Vorsprung die Form einer Umdrehungsrippe (24) aufweist, die sich vollständig radial außerhalb eines äußeren Endes der Flügel (3) oder des Rings (5) befindet und an der axialen Wand (25) des zylindrischen Hohlraums befestigt ist.
  6. Gebläse nach Anspruch 5, wobei die Rippe (24) im Radialschnitt eine Form aufweist, deren Neigung zwischen der stromaufwärtigen vorderen Wand (22) und der axialen Wand (25) kontinuierlich variabel ist.
  7. Gebläse nach Anspruch 5 oder 6, wobei die Rippe (24) in einer axialen Richtung an der axialen Wand befestigt ist oder im Bereich ihrer Verbindung mit der axialen Wand in einer radialen Ebene ausgerichtet ist.
  8. Gebläse nach Anspruch 4, wobei die Umdrehungsrippe (24) einen Kanal zur Führung des zwischen dem Ring (5) und der axialen Wand (25) zirkulierenden Stroms ausbildet.
  9. Gebläse nach Anspruch 4 bis 8, wobei die Umdrehungsrippe (24) im Radialschnitt eine Form aufweist, deren Neigung zwischen dem radialen Teil der stromaufwärtigen vorderen Wand (22) und ihrem radialen inneren Ende kontinuierlich variabel ist.
  10. Gebläse nach einem der Ansprüche 1, 8 oder 9, wobei die Rippe in einer axialen Richtung an der axialen Wand (25) befestigt ist.
  11. Gebläse nach einem der Ansprüche 1, 8 oder 9, wobei die Rippe im Bereich ihres radialen inneren Endes in einer radialen Ebene ausgerichtet ist.
  12. Kraftfahrzeugkühlmodul, umfassend ein Gebläse nach einem der vorangehenden Ansprüche.
EP13711432.8A 2012-04-16 2013-03-22 Kraftfahrzeuggebläse mit reduzierter achsengrösse Active EP2839165B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1253462A FR2989423B1 (fr) 2012-04-16 2012-04-16 Ventilateur pour automobile a encombrement axial reduit
PCT/EP2013/056141 WO2013156254A1 (fr) 2012-04-16 2013-03-22 Ventilateur pour automobile a encombrement axial reduit

Publications (2)

Publication Number Publication Date
EP2839165A1 EP2839165A1 (de) 2015-02-25
EP2839165B1 true EP2839165B1 (de) 2020-08-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13711432.8A Active EP2839165B1 (de) 2012-04-16 2013-03-22 Kraftfahrzeuggebläse mit reduzierter achsengrösse

Country Status (5)

Country Link
US (1) US9784277B2 (de)
EP (1) EP2839165B1 (de)
CN (1) CN104302925B (de)
FR (1) FR2989423B1 (de)
WO (1) WO2013156254A1 (de)

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JP2015155681A (ja) * 2014-02-21 2015-08-27 株式会社デンソー 送風装置
US10174481B2 (en) * 2014-08-26 2019-01-08 Cnh Industrial America Llc Shroud wear ring for a work vehicle
JP6576466B2 (ja) 2015-04-15 2019-09-18 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ 自由先端部型軸流ファンアセンブリ
FR3081942B1 (fr) * 2018-05-31 2021-05-21 Valeo Systemes Thermiques Turbine pour ventilateur tangentiel destine a equiper un vehicule automobile, ventilateur tangentiel, dispositif de ventilation et module d’echange de chaleur pour vehicule automobile
US20220170469A1 (en) * 2020-12-02 2022-06-02 Robert Bosch Gmbh Counter-Rotating Fan Assembly

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Also Published As

Publication number Publication date
US20150071776A1 (en) 2015-03-12
FR2989423A1 (fr) 2013-10-18
EP2839165A1 (de) 2015-02-25
WO2013156254A1 (fr) 2013-10-24
US9784277B2 (en) 2017-10-10
CN104302925B (zh) 2018-12-21
CN104302925A (zh) 2015-01-21
FR2989423B1 (fr) 2015-03-06

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