EP2697517B1 - Propeller eines impulsluftstromgenerators, insbesondere für ein tragbares gebläse - Google Patents

Propeller eines impulsluftstromgenerators, insbesondere für ein tragbares gebläse Download PDF

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Publication number
EP2697517B1
EP2697517B1 EP12721327.0A EP12721327A EP2697517B1 EP 2697517 B1 EP2697517 B1 EP 2697517B1 EP 12721327 A EP12721327 A EP 12721327A EP 2697517 B1 EP2697517 B1 EP 2697517B1
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EP
European Patent Office
Prior art keywords
propeller
parts
hub
propeller according
air intake
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.)
Active
Application number
EP12721327.0A
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English (en)
French (fr)
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EP2697517A1 (de
Inventor
Roger Pellenc
Philippe Gilbert
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.)
Pellenc SAS
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Pellenc SAS
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Publication of EP2697517A1 publication Critical patent/EP2697517A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid 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
    • F04D29/34—Blade mountings
    • 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
    • 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
    • F04D29/388—Blades characterised by construction
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/12—Light metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the present invention relates to a propeller for a pulsed air flow generator, in particular for a portable blower. More particularly interestingly, it is applicable to portable blowers. Such devices are commonly used to "sweep up" dead leaves or various rubbish that can cover various surfaces such as lawns, urban traffic routes, outdoor parking lots, sports fields, playgrounds, etc.
  • the invention also relates to portable devices, in particular autonomous portable blowers comprising a pulsed air flow generator making use of this method and this propeller.
  • Axial fans used in the production of blowing machines comprise a helix consisting of a plurality of radial blades, straight or twisted, attached via their base to a central hub.
  • Blowers using straight-blade propellers have disadvantages in particular a low yield, so it is often preferred to use propellers consisting of twisted blades having a better. performance.
  • each blade acts a bit like an airplane wing. At the entrance to the air, it presents a leading edge and, at the exit of the air, a trailing edge. In order to function optimally, it is necessary that the air arrives substantially perpendicular to the leading edge.
  • the fan in application of the principle of the triangle of velocities ( Figures 8, 8A, 8B ), it is sought to create, via the rotation of the fan, an air flow velocity Va as homogeneous as possible over the entire surface of the fan and thus obtain a speed Va.
  • the document US-2010/0074761 describes a propellant propeller constituted by the assembly of two pieces coaxially contiguous one after the other, that is to say: a first anterior part formed in a single block and consisting of a plurality of twisted blades attached to a ring central, a second posterior piece of conical general shape also formed of a single block.
  • the two pieces are assembled by engagement of the base of the blades of the propeller in slots that has the second rear piece.
  • the central portion of this assembly is in the form of a truncated cone whose apex is constituted by a relatively large flat area disturbing the aerodynamics of the air inlet.
  • the document US 4462757 discloses a cooling fan propeller also constituted by the assembly of two pieces coaxially contiguous one after the other, ie: a first anterior piece formed integrally and consisting of a plurality of twisted blades attached to a central ring, a second rear part of conical general shape also formed of a single block. The two pieces are assembled by means of screws.
  • the central portion of this assembly has the shape of a truncated cone whose apex is also constituted by a relatively large flat area disturbing the aerodynamics of the air inlet.
  • the document DE-28 55 909 also describes a propeller for an internal combustion engine cooling fan constituted by the assembly of two pieces coaxially contiguous one after the other, ie: a first an anterior piece formed of a single block and consisting of a plurality of twisted blades attached to a central ring, a second rear part of conical general shape also formed of a single block.
  • the first and second parts are also assembled by means of a plurality of screws.
  • the central portion of this assembly has the shape of a truncated cone whose apex is also constituted by a relatively large flat area disturbing the aerodynamics of the air inlet.
  • An object of the present invention is to provide a propeller free from the aforementioned drawbacks.
  • the front part of the clamping device has a conical shape and constitutes the top of the air inlet cone.
  • the locking of the two parts of the hub in the clamping position is obtained by a forced engagement of the rear part of said hub in the anterior part thereof.
  • the hub comprises an axial bore for housing the end of the shaft of a drive motor, the end of the shaft being secured to the front part of the hub by forced engagement.
  • the anterior and posterior parts are assembled by embedding and the twisted blades are attached to the central ring by means of spaced blade legs and the rear piece comprises a plurality of spaced teeth or claws, engaged in the gaps between said blade roots.
  • the device according to the invention is also remarkable in that the outer surface of the blade roots and the outer surface of the teeth or claws constitute portions of the surface of the air intake cone, the junction lines of these external surfaces. being almost imperceptible, so that the assembly of these surfaces has the appearance of a continuous conical surface.
  • the invention also relates to a portable blower comprising an axial fan, characterized in that the helix of this axial fan comprises at least one of the main characteristics mentioned above.
  • anterior parts 2 and posterior 5 are assembled by embedding.
  • the twisted blades 3 are attached to the central ring 4 by means of spaced blade roots 3a and the rear part 5 has a plurality of teeth or claws 5a spaced, engaged in the intervals 7 arranged between said blade roots 3a.
  • the claws 5a of the rear part 5 have a straight edge oriented along a generatrix of the air intake cone or oriented obliquely with respect to this generator, and a curved opposite edge whose conformation corresponds to the surface of the blade roots with which this curved edge is in contact.
  • This complementary conformation of the claws 5a and the blade roots 3a allows a good assembly by embedding the anterior parts 2 and posterior 5.
  • the blade roots 3a to which is attached the base of the blades 3 have, laterally, a surface projecting on one side of said base.
  • the outer surface 8 of the protruding portion of the blade roots 3a and the outer surface 9 of the teeth or claws 5a constitute portions of the surface of the air inlet cone 6.
  • the anterior and posterior pieces 5 are obtained by molding using any suitable material and process, for example by an injection method known per se.
  • anterior parts 2 and posterior 5 are made of plastic or light metal, having the desired rigidity for their function.
  • a clamping device 10 (FIG. Figures 4 and 5 ) constituted by a hub comprising two parts 11 and 12 assembled coaxially and between which are clamped the two recessed portions 2, 5 constituting the helix 1.
  • the hub 10 is integral in rotation with the helix 1.
  • the cylindrical inner surface of the central ring 4 has, for this purpose, angularly spaced ribs 13 oriented parallel to its axis, while the cylindrical outer surface of the rear part 10 of the hub 9 has grooves 14 angularly spaced in which are engaged the ribs 13.
  • the front part 12 of the clamping hub 10 has a conically shaped front portion 12a disposed at the front of the truncated cone 6 and forming therewith an air inlet cone 6-12a. Said front portion 12a forming the apex of this air intake cone.
  • the locking of the two parts 11, 12 of the clamping hub 10 in the clamping position is preferably obtained by a forced engagement of the rear part 11 of said hub 10 in the front piece 12 of the latter.
  • the hub 10 has an axial bore 15 for housing the end 16a of the shaft of a drive motor 16, the end of the shaft being secured to the front piece 12 of the hub 10 by forced engagement.
  • shaft 16 is thus integral in rotation with the hub 10 which is itself integral in rotation with the propeller 1 itself.
  • the portable blower according to the invention is of the type comprising an axial fan.
  • this blower is remarkable in that the axial fan has the important characteristic features described above, or results from the implementation of the method according to the invention.

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

Claims (12)

  1. Propeller (1) eines Impulsluftstomgenerators, insbesondere für tragbare autonome Gebläse des Typs, der aus zwei Seite an Seite koaxial miteinander zusammengesetzten Teilen besteht, und zwar:
    - ein erstes einstückig ausgebildetes vorderes Bauteil (2) mit einer Vielzahl von verdrehten Schaufeln (3), die an einem zentralen Ring angebracht ist,
    - und eine zweites hinteres einstückig ausgebildetes, hauptsächlich konisch geformtes Bauteil (5),
    der zentrale Abschnitt (6) dieser Anordnung ist mit einer konischen Form ausgebildet und umfasst den hinteren Abschnitt eines Lufteintrittskonus, wobei der Propeller dadurch gekennzeichnet ist, dass die ersten und zweiten vorderen und hinteren Bauteile mittels einer Klemmvorrichtung (10) verbunden sind, bestehend aus einer Nabe, bestehend aus zwei Teilen (11, 12), die koaxial zusammengesetzt sind und zwischen denen die genannten zwei Bauteile (2, 5) eingeklemmt sind, die den Propeller (1) bilden, wobei die Nabe mit letzterem kraftschlüssig verbunden ist und die Aufrechterhaltung der Montageposition der genannten vorderen und hinteren Bauteile gewährleistet.
  2. Propeller nach Anspruch 1, dadurch gekennzeichnet, dass das Vorderteil (12) der Spannvorrichtung (10) eine konische Form besitzt und den oberen Teil des Lufteinlasskonus (6-12a) bildet.
  3. Propeller nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die beiden Teile (11, 12), welche die Klemmvorrichtung (10) oder der Nabe
  4. Propeller nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Verriegelung der beiden Teile (11, 12) der Nabe (10) in der Verriegelungsstellung durch eine erzwungene Verschachtelung des hinteren Teils (11) der besagten Nabe mit dem Vorderteil (12) davon erhalten wird.
  5. Propeller nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Nabe (10) eine axiale Bohrung (15) aufweist, in der das Ende (16a) der Welle (16) eines Antriebsmotors aufgenommen ist, wobei das Ende der Welle mit dem Vorderteil (12) der Nabe (10) durch Zwangseingriff kraftschlüssig verbunden ist.
  6. Propeller nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die vorderen und hinteren Bauteile (2, 5) durch Einpassung verbunden sind.
  7. Propeller nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die verdrehten Schaufeln (3) an dem zentralen Ring (4) mittels beabstandeter Schaufelfüssen (3a) befestigt sind und dass das hinter Bauteil (5) eine Vielzahl von zueinander beabstandeter Zähnen oder Klauen (5a) aufweist, die in die Intervalle (7) zwischen den genannten Füße der Schaufeln eingreifen.
  8. Propeller nach Anspruch 7, dadurch gekennzeichnet, dass die Klauen (5a) des hinteren Bauteils (5) eine Kante besitzen, die quer zu einer Mantellinie des Lufteintrittskonus oder schräg zu dieser orientiert ist sowie eine gegenüberliegende gekrümmte Kante, deren Gestaltung der Oberfläche der Schaufelfüße, mit denen die gekrümmte Kante in Kontakt ist, entspricht.
  9. Propeller nach einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, dass die Füße der Schaufeln (3a), an denen die Basis der Schaufeln (3) verbunden ist, eine seitlich vorstehende Oberfläche auf der einen Seite der Basis aufweisen, wobei die Außenfläche (8) des vorstehenden Abschnitts der Füße der Schaufeln (3a) und die Außenfläche (9) der Zähne oder Klauen (5a) bilden Oberflächenabschnitte der Oberfläche des Lufteintrittskonus (6).
  10. Propeller nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die vorderen und hinteren Bauteile (2, 5) durch Gießformen erhalten wurden.
  11. Propeller nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die vorderen und hinteren Bauteile (2, 5) aus festem Kunststoffmaterial oder Leichtmetall ausgebildet sind.
  12. Tragbares Gebläse mit einem Axiallüfter, dadurch gekennzeichnet, dass der Propeller des Axiallüfters gemäß einem der Ansprüche 1 bis 11 ausgebildet ist.
EP12721327.0A 2011-04-11 2012-04-05 Propeller eines impulsluftstromgenerators, insbesondere für ein tragbares gebläse Active EP2697517B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1101102A FR2973847B1 (fr) 2011-04-11 2011-04-11 Helice de generateur de flux d'air pulse, en particulier pour souffleur portatif.
PCT/FR2012/000128 WO2012140336A1 (fr) 2011-04-11 2012-04-05 Hélice de générateur de flux d'air puisé, en particulier pour souffleur portatif.

Publications (2)

Publication Number Publication Date
EP2697517A1 EP2697517A1 (de) 2014-02-19
EP2697517B1 true EP2697517B1 (de) 2016-03-16

Family

ID=46085655

Family Applications (1)

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EP12721327.0A Active EP2697517B1 (de) 2011-04-11 2012-04-05 Propeller eines impulsluftstromgenerators, insbesondere für ein tragbares gebläse

Country Status (7)

Country Link
US (1) US10001135B2 (de)
EP (1) EP2697517B1 (de)
JP (1) JP5992503B2 (de)
CN (1) CN103562559B (de)
DK (1) DK2697517T3 (de)
FR (1) FR2973847B1 (de)
WO (1) WO2012140336A1 (de)

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FR2973815B1 (fr) * 2011-04-07 2014-08-29 Pellenc Sa Souffleur electroportatif autonome a vitesse de sortie d'air modulable
EP2884052B1 (de) * 2013-12-13 2018-02-21 Siemens Aktiengesellschaft Rotor für eine strömungsmaschine mit geschlossenem strömungskonturring und verfahren zur herstellung desselben
JP6309884B2 (ja) * 2014-11-25 2018-04-11 三菱重工業株式会社 インペラ、及び回転機械
KR102267854B1 (ko) 2014-11-25 2021-06-22 삼성전자주식회사 데이터 스케줄링 및 전력 제어를 위한 방법 및 그 전자장치
USD773632S1 (en) * 2015-11-10 2016-12-06 Unada Co. Ltd. Fan impeller
CA2966053C (en) * 2016-05-05 2022-10-18 Tti (Macao Commercial Offshore) Limited Mixed flow fan
US10738630B2 (en) * 2018-02-19 2020-08-11 General Electric Company Platform apparatus for propulsion rotor
US11486412B1 (en) * 2019-03-08 2022-11-01 Delta T, Llc Fan blade retention system and related methods
CN112797022B (zh) * 2020-12-21 2022-06-28 珠海格力电器股份有限公司 一种风叶组件及具有它的电机
US11821436B2 (en) * 2021-05-28 2023-11-21 Thermo King Llc High efficiency axial fan
WO2023064213A1 (en) * 2021-10-11 2023-04-20 Milwaukee Electric Tool Corporation Fan for handheld blower

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Also Published As

Publication number Publication date
FR2973847B1 (fr) 2015-10-30
WO2012140336A1 (fr) 2012-10-18
JP5992503B2 (ja) 2016-09-14
JP2014510876A (ja) 2014-05-01
CN103562559A (zh) 2014-02-05
US20140105749A1 (en) 2014-04-17
DK2697517T3 (en) 2016-05-09
EP2697517A1 (de) 2014-02-19
FR2973847A1 (fr) 2012-10-12
US10001135B2 (en) 2018-06-19
CN103562559B (zh) 2016-01-20

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