EP0096255A1 - Ventilateur axial entraîné par un moteur électrique, particulièrement pour des ventilateurs de refroidissement dans les voitures automobiles - Google Patents

Ventilateur axial entraîné par un moteur électrique, particulièrement pour des ventilateurs de refroidissement dans les voitures automobiles Download PDF

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Publication number
EP0096255A1
EP0096255A1 EP83104922A EP83104922A EP0096255A1 EP 0096255 A1 EP0096255 A1 EP 0096255A1 EP 83104922 A EP83104922 A EP 83104922A EP 83104922 A EP83104922 A EP 83104922A EP 0096255 A1 EP0096255 A1 EP 0096255A1
Authority
EP
European Patent Office
Prior art keywords
blade
impeller
hub
axial fan
outer diameter
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
EP83104922A
Other languages
German (de)
English (en)
Other versions
EP0096255B1 (fr
Inventor
Albert Dipl.-Ing. Kirchner
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0096255A1 publication Critical patent/EP0096255A1/fr
Application granted granted Critical
Publication of EP0096255B1 publication Critical patent/EP0096255B1/fr
Expired legal-status Critical Current

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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
    • F04D29/38—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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans

Definitions

  • the invention relates to a stator-less axial fan, in particular for motor vehicle radiator fans driven by an electric motor, according to the preamble of patent claim 1.
  • Axial fans of the aforementioned type were mainly used as cooling fans in motor vehicles in the past;
  • the impellers of these axial fans consisted of non-twisted, slightly curved sheets with two beads, each riveted to a star-shaped hub body.
  • Such impellers have largely been replaced in the course of time by high-quality plastic impellers with twisted plastic impeller blades and profiled blade cuts.
  • the efficiency 2 LSt that can be achieved with the known axial fans described above. is in the unfavorable installation conditions in a motor vehicle with a relatively large gap between the impeller and guide ring and not optimally designed guide devices at values of maximum 40%.
  • the object of the present invention is to provide an axial fan which is driven by an electric motor and which, despite being technically and structurally simple in construction, gives a lower power-to-weight ratio.
  • the object is achieved in an axial fan of the type specified in the preamble of claim 1 or in the preamble of claim 2 according to the invention by the teaching according to the characterizing part of claim 1 or claim 2.
  • Advantageous embodiments of the invention are the subject of the dependent claims.
  • an axial fan designed according to the invention assuming the same unfavorable installation conditions and the same materials as well as a constant strength with its surface which is significantly smaller than that of conventional impellers and which is simple at the same time as the impeller hub, in particular as a one-piece injection-molded plastic part blades that can be produced with a weight reduction of 30 - 40% enables the impeller efficiency ⁇ LSt to be increased to 45%.
  • the combination of low weight and good strength can be further improved if a value is selected for the design parameter D N (hub diameter) that is in the range 0.3 ... 0.4 D 2 , where D 2 represents the value of the selected outer diameter of the impeller.
  • the construction parameters d max (greatest blade thickness at the front edge of the blade) or.
  • d min (greatest blade thickness at the rear edge of the blade) a value selected from the following range: d max ⁇ 0.01 D 2 ; d min ⁇ 1/2 d max .
  • the overall power-to-weight ratio of the axial fan can be reduced even further in an advantageous manner that, in the case of a cup-shaped hub of the impeller, radially extending ribs within this hub and in each case between the radially inner ends of the ribs in the end face of the cup-shaped hub are provided with ventilation openings such that an air flow sucked in by the driven impeller through the ventilation openings accelerates in the area of the ribs in the radial direction and on the inside of the cylindrical wall of the cup-shaped hub axially against the surface of the drive motor is deflected.
  • these ribs are also made in one piece with the remaining part of the impeller as an injection molded part with moldings which can only be pulled in one direction;
  • Such an impeller contributes to the uniform success of a low power-to-weight ratio of the axial fan both through its advantageous blade construction and through its cooling technology-appropriate hub construction.
  • Fig. 1 shows an electric drive motor 1 of an axial fan, on the free shaft end 11, an impeller 2 is fixedly mounted.
  • the entire axial fan is e.g. held in a guide device of a motor vehicle (not shown) by means of screws 3 and via three mounting brackets 4 fastened to the housing of the drive motor 1.
  • the impeller 2 has a cup-shaped hub 21 fastened on the shaft end 11 of the drive motor 1, with an end face 212 and a cylindrical wall 211; on the outside of the cylindrical landing 211 are arranged in a star shape and five blades 22 are integrally formed on the circumference in one piece.
  • Radially projecting ribs 214 are also integrally formed within the cup-shaped hub 21, likewise uniformly distributed over the circumference.
  • Ventilation openings 213 are provided in each case between the radial inner ends of the ribs 214 in the end face 212 of the cup-shaped hub 21, such that an air flow sucked in by the driven impeller 2 accelerates in the area of the ribs 214 in the radial direction and then on the inside of the cylindrical wall 211 the cup-shaped hub 21 is deflected axially against the surface of the drive motor 1.
  • the ribs 214 formed inside the hub 21 of the impeller 2 behave together with the ventilation openings 213 in the end face 211 of the hub 21 like a radial fan.
  • the impeller 2 is determined by the following design parameters:
  • the blade length 1 can first be determined for a specific impeller, taking into account the ranges specified for the respective construction parameters, for example starting from a selected outer diameter D 2 of the impeller; taking into account the proposed parameter value for the constant angle of attack ß s , the arcs R su and R can then be determined for the radii of curvature of the underside and top of the blade, taking into account the maximum and minimum wall thickness of the blade (d max and d min ).
  • the blades defined in this way with the aid of the two circular arc lines are then to be rounded off only in the region of the front edge or the rear edge in the transition between the lower and upper radius of curvature from the previously described circular arc lines, but adapted to these.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP83104922A 1982-06-01 1983-05-18 Ventilateur axial entraîné par un moteur électrique, particulièrement pour des ventilateurs de refroidissement dans les voitures automobiles Expired EP0096255B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3220574 1982-06-01
DE19823220574 DE3220574A1 (de) 1982-06-01 1982-06-01 Leitradloser axialventilator, insbesondere fuer elektromotorisch angetriebene kraftfahrzeug-kuehlerventilatoren

Publications (2)

Publication Number Publication Date
EP0096255A1 true EP0096255A1 (fr) 1983-12-21
EP0096255B1 EP0096255B1 (fr) 1986-08-13

Family

ID=6164998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104922A Expired EP0096255B1 (fr) 1982-06-01 1983-05-18 Ventilateur axial entraîné par un moteur électrique, particulièrement pour des ventilateurs de refroidissement dans les voitures automobiles

Country Status (4)

Country Link
EP (1) EP0096255B1 (fr)
JP (1) JPS58214699A (fr)
DE (2) DE3220574A1 (fr)
ES (1) ES281172Y (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251028A (en) * 1990-12-21 1992-06-24 Black & Decker Inc Cooling electric motor with a radial-flow fan
FR2672089A1 (fr) * 1991-01-25 1992-07-31 Bosch Gmbh Robert Roue de ventilateur avec un moyeu en forme de chapeau.
EP0524863A1 (fr) * 1991-07-26 1993-01-27 Renault Vehicules Industriels Hélice de ventilateur
EP0553598A1 (fr) * 1992-01-30 1993-08-04 SPAL S.r.l. Ventilateur avec pales convexes
GB2302141A (en) * 1995-06-13 1997-01-08 Lg Electronics Inc Axial flow fan for microwave oven
EP0761979A1 (fr) * 1995-08-03 1997-03-12 Valeo Thermique Moteur Ventilateur à courant axial
FR2781843A1 (fr) * 1998-07-28 2000-02-04 Valeo Thermique Moteur Sa Helice de ventilateur compacte optimisee
WO2002075159A1 (fr) * 2001-03-15 2002-09-26 Arçelik A.S. Ventilateur axial
DE102006023417A1 (de) * 2006-05-17 2007-11-22 Ford Global Technologies, LLC, Dearborn Lüfterrad als Bestandteil eines Lüfters zur Kühlung eines Kraftfahrzeugantriebs
US8079823B2 (en) 2004-07-21 2011-12-20 Delta T Corporation Fan blades
US20130081296A1 (en) * 2011-10-04 2013-04-04 Whirlpool Corporation Blower for a laundry treating appliance
EP1619392B1 (fr) * 2004-07-21 2017-01-04 Delta T Corporation Pales de ventilateur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309900B (en) * 1994-11-17 1998-03-25 Mcdougall Gregory J Electric fan heater
KR100382914B1 (ko) * 2000-07-27 2003-05-09 엘지전자 주식회사 축류팬

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885888A (en) * 1973-03-26 1975-05-27 John G Warhol Cooling fan for radiators and the like
US4123198A (en) * 1977-03-28 1978-10-31 Harbord Horace R Propeller
US4150919A (en) * 1977-06-10 1979-04-24 Wallace Murray Corporation Radiator cooling fan construction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385516A (en) * 1966-03-31 1968-05-28 Gen Electric Fan construction
US4331623A (en) * 1978-09-22 1982-05-25 El Paso Polyolefins Company Polymer flow through die
JPS5587897A (en) * 1978-12-26 1980-07-03 Nissan Motor Co Ltd Cooling fan for radiator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885888A (en) * 1973-03-26 1975-05-27 John G Warhol Cooling fan for radiators and the like
US4123198A (en) * 1977-03-28 1978-10-31 Harbord Horace R Propeller
US4150919A (en) * 1977-06-10 1979-04-24 Wallace Murray Corporation Radiator cooling fan construction

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251028A (en) * 1990-12-21 1992-06-24 Black & Decker Inc Cooling electric motor with a radial-flow fan
GB2251028B (en) * 1990-12-21 1994-08-24 Black & Decker Inc Electric motor with a cooling fan
FR2672089A1 (fr) * 1991-01-25 1992-07-31 Bosch Gmbh Robert Roue de ventilateur avec un moyeu en forme de chapeau.
EP0524863A1 (fr) * 1991-07-26 1993-01-27 Renault Vehicules Industriels Hélice de ventilateur
FR2679606A1 (fr) * 1991-07-26 1993-01-29 Renault Vehicules Ind Helice de ventilateur.
EP0553598A1 (fr) * 1992-01-30 1993-08-04 SPAL S.r.l. Ventilateur avec pales convexes
GB2302141B (en) * 1995-06-13 1997-10-22 Lg Electronics Inc Axial flow fan for microwave oven
GB2302141A (en) * 1995-06-13 1997-01-08 Lg Electronics Inc Axial flow fan for microwave oven
EP0761979A1 (fr) * 1995-08-03 1997-03-12 Valeo Thermique Moteur Ventilateur à courant axial
FR2781843A1 (fr) * 1998-07-28 2000-02-04 Valeo Thermique Moteur Sa Helice de ventilateur compacte optimisee
WO2000006913A1 (fr) * 1998-07-28 2000-02-10 Valeo Thermique Moteur Helice de ventilateur
US6350104B1 (en) 1998-07-28 2002-02-26 Valeo Thermique Moteur Fan blade
WO2002075159A1 (fr) * 2001-03-15 2002-09-26 Arçelik A.S. Ventilateur axial
US8079823B2 (en) 2004-07-21 2011-12-20 Delta T Corporation Fan blades
EP1619392B1 (fr) * 2004-07-21 2017-01-04 Delta T Corporation Pales de ventilateur
DE102006023417A1 (de) * 2006-05-17 2007-11-22 Ford Global Technologies, LLC, Dearborn Lüfterrad als Bestandteil eines Lüfters zur Kühlung eines Kraftfahrzeugantriebs
CN101101006B (zh) * 2006-05-17 2012-06-27 福特环球技术公司 作为用于冷却汽车驱动装置的风扇的组成部分的叶轮
US20130081296A1 (en) * 2011-10-04 2013-04-04 Whirlpool Corporation Blower for a laundry treating appliance
US8776394B2 (en) * 2011-10-04 2014-07-15 Whirlpool Corporation Blower for a laundry treating appliance

Also Published As

Publication number Publication date
DE3365271D1 (en) 1986-09-18
ES281172U (es) 1985-03-01
JPS58214699A (ja) 1983-12-13
ES281172Y (es) 1985-10-01
DE3220574A1 (de) 1983-12-01
EP0096255B1 (fr) 1986-08-13

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