EP1571345B1 - Lüfter - Google Patents

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Publication number
EP1571345B1
EP1571345B1 EP05300100A EP05300100A EP1571345B1 EP 1571345 B1 EP1571345 B1 EP 1571345B1 EP 05300100 A EP05300100 A EP 05300100A EP 05300100 A EP05300100 A EP 05300100A EP 1571345 B1 EP1571345 B1 EP 1571345B1
Authority
EP
European Patent Office
Prior art keywords
fan according
foregoing
flange
hub
relief
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.)
Revoked
Application number
EP05300100A
Other languages
English (en)
French (fr)
Other versions
EP1571345A1 (de
Inventor
Alain Buisson
Marc Elkeletian
Adrien Menard
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.)
Moteurs Leroy Somer SA
Original Assignee
Moteurs Leroy Somer 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34746473&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1571345(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Moteurs Leroy Somer SA filed Critical Moteurs Leroy Somer SA
Publication of EP1571345A1 publication Critical patent/EP1571345A1/de
Application granted granted Critical
Publication of EP1571345B1 publication Critical patent/EP1571345B1/de
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/34—Blade mountings

Definitions

  • the present invention relates to the attachment of the blades on the hub of a fan, including a helical fan.
  • each blade is held between a flange and the corresponding counter flange, which reduces the local stresses in the blade.
  • the clamping device may comprise at least one screw or a rivet. When a screw is used, it can be, for example, self-forming or, alternatively, conventional net.
  • the clamping device may comprise a single screw for each blade.
  • the screw is central.
  • Such a screw can advantageously replace several rivets, for example.
  • the clamping force can be more easily controlled with a screw than with a rivet.
  • the hub is advantageously monolithic, being made for example by injection molding, in particular aluminum or aluminum alloy.
  • the counter flange may be monolithic and obtained by injection molding also, in particular aluminum or aluminum alloy.
  • the blade itself may be metal, for example aluminum sheet or stamped steel, but it is not beyond the scope of the present invention if it is made of other materials.
  • the fan may comprise between 2 and 12, or even between 4 and 10, in particular between 5 and 8 blades, 7 blades for example.
  • the flanges are inclined relative to the axis of rotation of the hub.
  • the flanges generally extend in a plane whose normal is not parallel to the axis of rotation of the fan, in particular non-coplanar with this axis.
  • the flanges extend out of a radial plane and / or out of a plane containing the axis of rotation of the fan.
  • Each flange may include a bore axis perpendicular to its plane.
  • the clamping device may comprise at least one washer interposed between a head of the screw or rivet and the flange.
  • the latter may include a counterbore for receiving the washer.
  • the counter-flange may comprise a barrel arranged to engage in a drilling of the flange.
  • the counter flange may comprise, on its inner face, a first relief configured to cooperate with a second relief formed on the face opposite the flange.
  • This first relief may be a recess, for example.
  • the shape of the first relief may be non-symmetrical of revolution, which may prevent it from turning relative to the flange. It can be for example of square shape.
  • the first relief may include inclined blanks to contribute to the centering of the counter-flange on the flange during assembly.
  • the second relief may have a truncated pyramidal general shape, with for example four sides.
  • the counter-flange may comprise an outwardly slightly convex outer face, which may contribute to improving the aerodynamics and make it possible to obtain a counter-flange whose variable thickness is chosen so as to have a stress of clamping relatively well distributed on its inner face, with a maximum to the right of the screw and a gradual decrease in this constraint when approaching the edges of the counter-flange.
  • the counter flange may comprise two opposite notches, adapted to cooperate with a corresponding tool during the manufacture of the fan.
  • the counter-flange may have a general diamond shape and the two notches may be located substantially on a diagonal of the rhombus.
  • FIG. 1 schematically, the hub 9 of a fan, this hub 9 being intended to be rotated about an axis of rotation X.
  • This hub 9 has at its periphery a succession of flanges 2 extending radially to and each serving for fixing a blade 1 which is shown schematically in section at the figure 2 .
  • Each blade 1 comprises a flattened end portion which is fixed on the corresponding flange 2 by means of a counter-flange 3 and a clamping device 4 comprising a screw 5 and a washer 6.
  • All the counter-flanges are parts that are independent of each other and preferably identical.
  • the hub 9 is monolithic and made by injection pressure aluminum.
  • the hub 9 comprises a bowl 21 to which the flanges 2 are connected, this bowl 21 internally having ribs 22 and at its center a hole 23 for the passage of the motor drive shaft.
  • This bore 23 has a groove 24 to receive a shaft key and improve the transfer of the driving torque.
  • the hub 9 comprises, in the example illustrated, an odd number of flanges 2, namely seven flanges 2, but it is not beyond the scope of the present invention if it comprises a different number, for example between 2 and 10 flanges, or between 5 and 8.
  • the fan has the same number of counter-flanges 3 and blades 1.
  • Each of the flanges 2 comprises a bore 10, whose axis is substantially perpendicular to the plane of the flange, but not parallel to the axis of rotation X of the hub.
  • the bore 10 may comprise an axis parallel to the axis of the hub.
  • Each of the flanges 2 comprises on its upper face 12 a countersink 11 for receiving the washer 6 and on its lower face 13 a relief 14 forming a projection, which has in the illustrated example a general shape of truncated pyramid with four sides, as one can see him on the figure 3 .
  • the blade 1 is held tight between the flange 2 and the counter-flange 3 by the screw 5.
  • the latter can be self-forming or alternatively conventional thread, but it is not beyond the scope of the present invention when the fastener 4 has several screws and / or one or more rivets.
  • the counter flange 3 is, in the example described, monolithic and obtained by aluminum injection. It includes, as illustrated in figure 4 , a shank 27 arranged to engage in the bore 10 of the flange 2 and receive the screw 5. This shank may be tapped during the introduction of the screw 5 when the latter is self-forming, or alternatively before the assembly of the opinion.
  • against the flange 3 further comprises, on its inner face, a recessed relief 28, configured to cooperate with the raised projection 14 above.
  • the relief 28 is in the example described a recess which has a substantially square shape, with inclined blanks 32 adapted to the shape of the corresponding relief 14.
  • the relief 28 could be of another non-symmetrical form of revolution, in particular polygonal.
  • the counter-flange 3 still presents, as can be seen on the figure 5 , an outwardly curved outer face 29 of aerodynamic profile, in order to create the least possible turbulence during the rotation of the fan.
  • the counter-flange 3 has a general diamond shape and has two opposite notches 30 located substantially on a diagonal of the rhombus to receive mounting tools and allow easier mounting of the corresponding blade 1 on the hub 9.
  • the shape of the flanges and counter-flanges can be modified.
  • the latter may for example cooperate differently with the flanges, with for example a protruding projection on the counter-flanges coming into a recessed hollow flanges.
  • each flange and the associated sector can be monolithic. It may for example be made by injection, for example of aluminum, or by injection of plastic material under pressure. Each sector can be assembled on the hub by screws.
  • the hub may for example comprise a central portion serving as a support for the sectors, the flanges being monolithic with the sectors.
  • Such a configuration makes it possible to use molds for injection that are less complex, and therefore less expensive, and to allow a certain degree of modularity, for example by varying the number of blades.
  • cylindrical base flanges it is easy to vary the inclination of the blades relative to the axis of rotation of the hub by loosening the half-hubs and rotating the bases of the flanges in their housing.
  • a non-monolithic hub can for example allow the manufacture of larger diameter propellers, or propellers whose number or orientation of the blades can be modified.
  • the fan according to the invention may be suitable for various industrial applications and in particular be different from a ceiling fan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Claims (24)

  1. Ventilator, umfassend:
    mindestens zwei Blätter (1),
    eine Nabe (9), umfassend mindestens zwei Flansche (2), die zur Befestigung der Blätter (1) auf der Nabe dienen,
    mindestens zwei Gegenflansche (3), die jeweils mit einem Flansch gepaart sind, und
    eine Einrichtung zum Einspannen (4) jedes Blattes (1) zwischen einem Flansch (2) und dem dazugehörigen Gegenflansch (3),
    gekennzeichnet dadurch, dass die Flansche bezüglich der Rotationsachse (X) der Nabe geneigt sind und im Wesentlichen jeweils in einer Ebene verlaufen, deren Normale nicht parallel zur Rotationsachse ist.
  2. Ventilator nach Anspruch 1, gekennzeichnet dadurch, dass die Einspanneinrichtung (4) mindestens eine Schraube (5) aufweist.
  3. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass die Schraube (5) selbstformend ist.
  4. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass die Nabe (9) monolithisch ist.
  5. Ventilator nach Anspruch 4, gekennzeichnet dadurch, dass die Nabe (9) durch einen Spritzvorgang, insbesondere mit Aluminium, hergestellt worden ist.
  6. Ventilator nach einem der Ansprüche 1 bis 3, in dem die Nabe nicht-monolithisch ist, insbesondere aus mehreren Sektoren zusammengesetzt ist.
  7. Ventilator nach Anspruch 6, in dem mindestens ein Flansch und der dazugehörige Sektor monolithisch sind.
  8. Ventilator nach Anspruch 6, in dem die Nabe mindestens zwei im Wesentlichen scheibenförmige Halbnaben umfasst.
  9. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass der Gegenflansch (3) monolithisch ist und durch einen Einspritzvorgang, insbesondere mit Aluminium, erhalten worden ist.
  10. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass er zwischen zwei und zwölf, vorzugsweise zwischen vier und zehn, insbesondere zwischen fünf und acht Blätter umfasst.
  11. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass er sieben Blätter umfasst.
  12. Ventilator nach Anspruch 11, gekennzeichnet dadurch, dass der Flansch (2) eine Bohrung (10) mit einer zur Ebene des Flansches senkrechten Achse umfasst.
  13. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass die Einspanneinrichtung (4) eine einzige Schraube (5) für jedes Blatt umfasst.
  14. Ventilator nach Anspruch 13, gekennzeichnet dadurch, dass die Einspanneinrichtung mindestens eine zwischen einem Kopf der Schraube (5) und dem Flansch (2) angeordnete Scheibe (6) umfasst.
  15. Ventilator nach Anspruch 14, gekennzeichnet dadurch, dass der Flansch eine Senkung (11) zum Empfangen der Scheibe (6) umfasst.
  16. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass der Gegenflansch (3) einen Schacht (27) umfasst, der dazu eingerichtet ist, in eine Bohrung (10) des Flansches (2) einzugreifen.
  17. Ventilator nach einem der Ansprüche 15 und 16, gekennzeichnet dadurch, dass der Gegenflansch (13) auf seiner Innenfläche (26) ein erstes Relief (28) umfasst, das dazu ausgelegt ist, mit einem auf der rückwärtigen Fläche (13) des Flansches (2) gebildeten zweiten Relief (14) zusammenzuwirken.
  18. Ventilator nach Anspruch 17, gekennzeichnet dadurch, dass das erste Relief (28) eine Vertiefung ist.
  19. Ventilator nach einem der Ansprüche 17 und 18, gekennzeichnet dadurch, dass das erste Relief (28) eine nicht rotationssymmetrische Form aufweist.
  20. Ventilator nach einem der Ansprüche 17 bis 19, gekennzeichnet dadurch, dass das erste Relief (28) geneigte Seitenwände (32) aufweist.
  21. Ventilator nach einem der Ansprüche 17 bis 20, gekennzeichnet dadurch, dass das zweite Relief (14) im Wesentlichen eine abgeschnittene Pyramidenform, insbesondere mit vier Seitenflächen, aufweist.
  22. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass der Gegenflansch (13) eine nach außen gewölbte Außenfläche (29) aufweist.
  23. Ventilator nach einem der vorhergehenden Ansprüche, gekennzeichnet dadurch, dass der Gegenflansch (13) zwei einander gegenüberliegende Aussparungen (30) umfasst.
  24. Ventilator nach Anspruch 23, gekennzeichnet dadurch, dass der Gegenflansch (3) eine im Wesentlichen rautenförmige Form aufweist und dass die zwei Aussparungen (30) im Wesentlichen auf einer Diagonale der Raute angeordnet sind.
EP05300100A 2004-03-01 2005-02-08 Lüfter Revoked EP1571345B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0402100A FR2866930B1 (fr) 2004-03-01 2004-03-01 Ventilateur comportant au moins une pale fixee par bride et contre-bride
FR0402100 2004-03-01

Publications (2)

Publication Number Publication Date
EP1571345A1 EP1571345A1 (de) 2005-09-07
EP1571345B1 true EP1571345B1 (de) 2008-10-08

Family

ID=34746473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05300100A Revoked EP1571345B1 (de) 2004-03-01 2005-02-08 Lüfter

Country Status (5)

Country Link
EP (1) EP1571345B1 (de)
AT (1) ATE410605T1 (de)
DE (1) DE602005010135D1 (de)
ES (1) ES2314600T3 (de)
FR (1) FR2866930B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006011899U1 (de) * 2006-08-03 2007-12-13 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilatorrad
EP2025947B1 (de) * 2007-07-31 2013-02-27 R.E.M. Holding S.R.L. Nabenprofilverbindungssystem für einen Axiallüfter und mit diesem Verbindungssystem ausgestatteter Axiallüfter
CN104235066A (zh) * 2014-10-10 2014-12-24 江苏富丽华通用设备有限公司 一种外转子轴流风机
CN107171467A (zh) * 2017-07-19 2017-09-15 广东泛仕达机电有限公司 一种电机包铝转子结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941691A1 (de) * 1989-12-18 1990-07-12 Ziehl Abegg Gmbh & Co Kg Ventilatorlaufrad mit aussenlaeuferantrieb und einzeln am rotor befestigten schaufeln
US5304037A (en) * 1993-04-14 1994-04-19 Hunter Fan Company Ceiling fan blade vibration isolation system
DE69816071T2 (de) * 1998-08-10 2004-04-22 Wu, San-Chi Blattanordnung eines Deckenlüfters
US6821091B2 (en) * 2002-06-05 2004-11-23 Litex Industries Inc. Securing device

Also Published As

Publication number Publication date
DE602005010135D1 (de) 2008-11-20
FR2866930A1 (fr) 2005-09-02
EP1571345A1 (de) 2005-09-07
ATE410605T1 (de) 2008-10-15
FR2866930B1 (fr) 2008-02-15
ES2314600T3 (es) 2009-03-16

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