EP0459497A2 - Ventilateur hélicoide avec boîtier cylindrique - Google Patents

Ventilateur hélicoide avec boîtier cylindrique Download PDF

Info

Publication number
EP0459497A2
EP0459497A2 EP91108890A EP91108890A EP0459497A2 EP 0459497 A2 EP0459497 A2 EP 0459497A2 EP 91108890 A EP91108890 A EP 91108890A EP 91108890 A EP91108890 A EP 91108890A EP 0459497 A2 EP0459497 A2 EP 0459497A2
Authority
EP
European Patent Office
Prior art keywords
axial fan
hub
fan according
cross
section
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
EP91108890A
Other languages
German (de)
English (en)
Other versions
EP0459497A3 (en
EP0459497B1 (fr
Inventor
Siegfried Harmsen
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.)
Papst Licensing GmbH and Co KG
Original Assignee
Papst Licensing GmbH and Co KG
Papst Motoren GmbH and Co KG
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 Papst Licensing GmbH and Co KG, Papst Motoren GmbH and Co KG filed Critical Papst Licensing GmbH and Co KG
Publication of EP0459497A2 publication Critical patent/EP0459497A2/fr
Publication of EP0459497A3 publication Critical patent/EP0459497A3/de
Application granted granted Critical
Publication of EP0459497B1 publication Critical patent/EP0459497B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • 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
    • 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
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/02—Formulas of curves
    • 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
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/05—Variable camber or chord length

Definitions

  • the invention relates to an axial fan with a substantially cylindrical outer housing and a fan wheel revolving therein, the hub of which is seated on the rotor of a centrally arranged electric drive motor, the stator of which is held by webs which extend on the pressure side to the outer housing, and the radially twisted blades of which have a forward curvature with a curvature that changes from the cross section to the outer cross section.
  • Such fans are installed to generate a cooling air flow, for example in personal computers and other electronic devices. Since such devices are often operated at desks and comparable workplaces, the noise development, which is associated with the generation of the cooling air flow plays a significant role. For fans of the type described at the outset, the task is therefore not only to generate a sufficient volume flow at such a pressure increase which is sufficient to overcome the flow resistance specified by the device construction, but also to cause as little working noise as possible. Furthermore, the need to reduce manufacturing costs has led to the manufacture of both the outer housing and the fan wheel from injection-molded plastic, whereas in the past the outer housing was die-cast from metal and the fan wheel was welded from sheet metal; this in turn has consequences for the design of the fan.
  • the fan wheel of the known fan described at the outset has seven blades, the cross-section of which is designed in every circumferential plane from the hub to the outer edge for the same characteristic point - that is, the same volume flow at a certain pressure increase.
  • the wing cross-section in the hub area has a strong curvature and at the same time a large setting angle (against the axis perpendicular); towards the outside, both the curvature and the setting angle decrease.
  • the cross section lengthens in accordance with the increasing scope.
  • this fan was only able to meet the expectations placed on it to a limited extent.
  • the volume flow with free-blowing operation seemed to indicate the generation of sufficient air circulation, the practical use showed realistic Conditions that the pressure increase was not sufficient to maintain the required volume flow even against the resistance at the place of use.
  • the aim of the invention was therefore to design an axial fan of the present type in such a way that, with the greatest possible reduction in operating noise, an increase in pressure is achieved which maintains the required volume flow of air even under installation conditions.
  • vanes in the hub area have a cross section designed for small volume flow and small pressure increase, in the outer area, on the other hand, a cross section designed for higher volume flow and pressure increase values, while the cross-sectional design in the area in between changes continuously and the vanes relatively small change in curvature are also slightly twisted overall.
  • the front edges starting from the hub, initially curve radially and further outward with the direction of rotation, while preferably the rear edges are inclined forwardly against the hub and are curved outward of the central section against the direction of rotation.
  • the wings are particularly preferably arranged in an odd number on the handle because this eliminates noises which otherwise occur in even-numbered wings due to the even-numbered division of the circumference.
  • the stator of the electric drive motor is also particularly preferably held by an even number of webs on the outer housing, as a result of which the undesired noises can be further reduced.
  • the forward curvature of the vanes particularly preferably decreases with increasing distance from the hub, within a cross-section of the vanes, that is to say at a constant one Distance from the hub, preferably the forward curvature increases towards the rear edge of the wings. It has been shown that such a shape particularly advantageously realizes the radial dependence of the volume flow and the pressure increase according to the invention.
  • the outer housing 1 of the axial fan consists of one piece and has a cylindrical section 2, which is delimited on the end face by molded-on, mutually aligned flange sections 3. In the corner areas of the pressure side, the cylindrical section 2 merges into extensions 4. In these, for example, there are four webs 5 which - parallel to the circumference - run parallel to the radius and open into a central plate 6 which carries the stator (not shown) of the (electric) drive motor. Holes 7 in the corners of the flanges 3 are used to fasten the fan, for example in a monitor housing.
  • the fan wheel designated as a whole by 10, has a hub 11, the diameter of which is substantially equal to the diameter of the plate 6, and which cup-shaped engages over the stator of the electric motor fastened on the plate 6 and is in operative connection with its rotor part.
  • the fan blades 12 with the hub 11 are made in one piece, which is produced in a plastic injection molding process.
  • FIG. 3 illustrates the different cross-sectional configuration of the blades in radially different circumferential planes (in the opposite direction of rotation; cf. direction of rotation arrow 8) more clearly than the top view of the middle blade 12 in FIG. 2.
  • the wing 12 attaches to the hub 11 in the hub region.
  • the middle profile shows the cross section 14, and the cross section 15 strongly outlined in FIG. 3 illustrates the wing profile on the outer circumference of the fan wheel. It shows that both the curvature, namely the greatest distance of the wing inner profile from the edge connecting 16 and the setting angle of this edge connecting relative to the perpendicular 17 to the axis 18, changes only slightly in the three cross-sectional (circumferential) planes.
  • the curvature has the shape of a forward curvature, which decreases with increasing distance from the hub 11.
  • the forward curvature - viewed in cross section of a wing - increases steadily from the front edge 20 to the rear edge 21.
  • This configuration of the vane 12 results if the radially inner vane profile (in the hub area) is given smaller values for volume flow and pressure increase than the configuration determination of the cross-section on the outer diameter when designing the profile; a suitable interpolation takes place in between.
  • FIG. 4 shows the corresponding cross-sectional configurations 13a, 14a and 15a of a wing which has been given the same characteristic values over its entire radial extent.
  • the top view of the impeller 10 in FIG. 1 illustrates the crescent shape of the leading edges 20 and the trailing edges 21 of each wing 12.
  • the leading edges 20 initially run radially outward and then are curved against the direction of rotation, while the trailing edges 21 start tilted backwards on the hub 11 and run outward of the wing center section with the direction of rotation curved.
  • the wing cross section 14 has the greatest length in the central section (FIG. 3).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP91108890A 1990-05-31 1991-05-31 Ventilateur hélicoide avec boîtier cylindrique Expired - Lifetime EP0459497B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9006174U 1990-05-31
DE9006174U DE9006174U1 (de) 1990-05-31 1990-05-31 Axiallüfter mit zylindrischem Außengehäuse

Publications (3)

Publication Number Publication Date
EP0459497A2 true EP0459497A2 (fr) 1991-12-04
EP0459497A3 EP0459497A3 (en) 1992-02-26
EP0459497B1 EP0459497B1 (fr) 1994-06-22

Family

ID=6854287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108890A Expired - Lifetime EP0459497B1 (fr) 1990-05-31 1991-05-31 Ventilateur hélicoide avec boîtier cylindrique

Country Status (4)

Country Link
US (1) US5184938A (fr)
EP (1) EP0459497B1 (fr)
AT (1) ATE107743T1 (fr)
DE (2) DE9006174U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583091A3 (fr) * 1992-07-22 1994-04-13 Valeo Thermique Moteur Sa
EP0955467A3 (fr) * 1998-05-04 2001-03-28 Carrier Corporation Ventilateur axial avec boíte d'une pièce
EP3982518A1 (fr) * 2020-10-06 2022-04-13 mdGroup Germany GmbH Rotor et procédé de montage d'un rotor

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127134B4 (de) * 1991-08-15 2004-07-08 Papst Licensing Gmbh & Co. Kg Diagonallüfter
USD368772S (en) 1993-10-08 1996-04-09 Harries Liao Fan wheel
CH687637A5 (de) * 1993-11-04 1997-01-15 Micronel Ag Axialkleinventilator.
USD368224S (en) 1994-08-31 1996-03-26 Arndt Peter L Lid for containers for waste filters
US5616004A (en) * 1995-04-19 1997-04-01 Valeo Thermique Moteur Axial flow fan
US5957661A (en) * 1998-06-16 1999-09-28 Siemens Canada Limited High efficiency to diameter ratio and low weight axial flow fan
US6386830B1 (en) 2001-03-13 2002-05-14 The United States Of America As Represented By The Secretary Of The Navy Quiet and efficient high-pressure fan assembly
US6457941B1 (en) 2001-03-13 2002-10-01 The United States Of America As Represented By The Secretary Of The Navy Fan rotor with construction and safety performance optimization
US6702548B1 (en) 2002-03-08 2004-03-09 Emerson Electric Co. Tubeaxial fan assembly
US6945758B1 (en) * 2002-03-08 2005-09-20 Emerson Electric Co. Drive support and cover assembly for tubeaxial fan
US6722849B1 (en) 2002-03-08 2004-04-20 Emerson Electric Co. Propeller for tubeaxial fan
US7249931B2 (en) * 2002-03-30 2007-07-31 University Of Central Florida Research Foundation, Inc. High efficiency air conditioner condenser fan with performance enhancements
US8647077B2 (en) * 2004-02-20 2014-02-11 Hewlett-Packard Development Company, L.P. Cooling fan for electronic device
USD561888S1 (en) * 2006-12-28 2008-02-12 Foxconn Technology Co., Ltd. Impeller
DE202008002356U1 (de) * 2008-02-19 2009-06-25 Ebm-Papst Mulfingen Gmbh & Co. Kg Kompaktlüfter
JP2013209956A (ja) * 2012-03-30 2013-10-10 Sanyo Denki Co Ltd 軸流ファン
USD723151S1 (en) * 2013-12-13 2015-02-24 Cooler Master Co., Ltd. Fan
US10578126B2 (en) 2016-04-26 2020-03-03 Acme Engineering And Manufacturing Corp. Low sound tubeaxial fan

Family Cites Families (19)

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Publication number Priority date Publication date Assignee Title
AT115470B (de) * 1925-09-21 1929-12-27 Voith J M Fa Laufradschaufel für Kreiselmaschinen.
US1964525A (en) * 1932-07-30 1934-06-26 Gen Electric Fan blade
US2524870A (en) * 1944-11-06 1950-10-10 James Russell Kennedy Screw fan, pump, or other cased or uncased screw wheel
US2578806A (en) * 1949-06-04 1951-12-18 Johnson Lawrence Propeller
GB683012A (en) * 1951-03-06 1952-11-19 Oscar Abraham Wirkkala Improvements in or relating to screw propellers
AT203428B (de) * 1957-01-30 1959-05-11 Ernst Dr Ing Souczek Laufrad für axiale Strömungsmaschinen, insbesondere Wasserturbinen
US3023709A (en) * 1958-05-26 1962-03-06 Kondo Masukichi Vanes of an impeller for axial flow propeller pumps
DE1964890A1 (de) * 1969-12-24 1971-07-01 Papst Motoren Kg Ventilator-Einheit mit Elektronik-Bauteilen
DE2226177A1 (de) * 1972-05-30 1973-12-13 Benzing Ventilatoren Ohg Ventilator, insbesondere zur entlueftung von kleinen raeumen
US4063852A (en) * 1976-01-28 1977-12-20 Torin Corporation Axial flow impeller with improved blade shape
JPS53115911A (en) * 1977-03-19 1978-10-09 Daikin Ind Ltd Axial-flow fan
US4142844A (en) * 1977-05-31 1979-03-06 Allware Agencies Ltd. Fan blade assemblies for box fans
US4358245A (en) * 1980-09-18 1982-11-09 Bolt Beranek And Newman Inc. Low noise fan
US4569631A (en) * 1984-08-06 1986-02-11 Airflow Research And Manufacturing Corp. High strength fan
EP0174487A1 (fr) * 1984-08-16 1986-03-19 Siemens Aktiengesellschaft Ventilateur axial
CH667901A5 (de) * 1985-05-02 1988-11-15 Papst Motoren Gmbh & Co Kg Einbauventilator.
IT206701Z2 (it) * 1985-08-02 1987-10-01 Gate Spa Ventilatore assiale particolarmente per autoveicoli
JP2590514B2 (ja) * 1987-03-13 1997-03-12 日本電装株式会社 送風ファン
DE8705665U1 (de) * 1987-04-16 1987-06-11 Knürr-Mechanik für die Elektronik AG, 8000 München Lüftereinschub

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583091A3 (fr) * 1992-07-22 1994-04-13 Valeo Thermique Moteur Sa
EP0955467A3 (fr) * 1998-05-04 2001-03-28 Carrier Corporation Ventilateur axial avec boíte d'une pièce
EP3982518A1 (fr) * 2020-10-06 2022-04-13 mdGroup Germany GmbH Rotor et procédé de montage d'un rotor
US12146505B2 (en) 2020-10-06 2024-11-19 Mdgroup Germany Gmbh Impeller machine and method for mounting an impeller machine

Also Published As

Publication number Publication date
US5184938A (en) 1993-02-09
DE9006174U1 (de) 1991-10-10
ATE107743T1 (de) 1994-07-15
DE59101986D1 (de) 1994-07-28
EP0459497A3 (en) 1992-02-26
EP0459497B1 (fr) 1994-06-22

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