EP0051005B1 - Axiallüfter mit geschützten Rotorblättern - Google Patents

Axiallüfter mit geschützten Rotorblättern Download PDF

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Publication number
EP0051005B1
EP0051005B1 EP81401532A EP81401532A EP0051005B1 EP 0051005 B1 EP0051005 B1 EP 0051005B1 EP 81401532 A EP81401532 A EP 81401532A EP 81401532 A EP81401532 A EP 81401532A EP 0051005 B1 EP0051005 B1 EP 0051005B1
Authority
EP
European Patent Office
Prior art keywords
grating
hub
edge
protective
fan
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.)
Expired
Application number
EP81401532A
Other languages
English (en)
French (fr)
Other versions
EP0051005A1 (de
Inventor
Joel Crespin
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.)
Lunite Hermetique SA
Original Assignee
Lunite Hermetique 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
Application filed by Lunite Hermetique SA filed Critical Lunite Hermetique SA
Publication of EP0051005A1 publication Critical patent/EP0051005A1/de
Application granted granted Critical
Publication of EP0051005B1 publication Critical patent/EP0051005B1/de
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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/219—Guards
    • Y10T74/2191—Guards for rotary member

Definitions

  • the present invention relates to an axial fan provided with a facial and radial protection device.
  • the English document GB-A-833 938 describes a fan according to the preamble of claim 1, comprising a protection device integral with the hub.
  • This protection device consists of a facial protection grid made up of radial elements making it possible to prevent access of certain foreign bodies between the blades of the fan.
  • the present invention relates to the realization of a space-saving axial fan, of low cost price, having satisfactory aerodynamic characteristics and comprising a facial and radial protection device which prevents the introduction of foreign bodies between the blades of the fan.
  • an axial fan comprising a hub carrying at least two blades and provided with a central hole for the passage of the motor shaft, and a protection device integral with the hub comprising a face protection grid and a radial protection ring integral with the grid, this ring being coaxial with the motor shaft and surrounding the radial ends of the blades, the facial protection grid consisting of bars arranged in a sufficiently tight manner to effectively reduce the intervals between these bars and prevent the introduction of foreign bodies between the blades, is characterized in that the bars of the grid are exclusively concentric rings, coaxial with the motor shaft, and in that the protective ring is a ferrule formed by a cylindrical wall and smooth, and in that the face protection grid and the ferrule are obtained in one piece by molding a plastic material.
  • the invention relates to the production by molding in a single block, the axial and radial protection device, the hub and the blades of the fan.
  • the fan according to the invention comprises a hub 15 carrying blades 12, 13 and a protection device comprising a face protection grid 11 formed of several concentric rings 20 connected to each other by arms 21.
  • This grid 11 is provided, at its periphery, with a radial protection ferrule 10 formed by a cylindrical wall, coaxial with the rings 20.
  • the arms 21 can be obtained by extensions of this ferrule 10.
  • the facial grid 10 is provided with a central orifice, the flange 22 of which is curved so as to be substantially parallel to the ferrule 10.
  • This flange 22, intended for fixing the protection device on the hub 15 of the fan can be introduced into a hollow part 18 of the free end of the hub 15 which has a central hole 16 for the passage of a motor shaft (not shown) of the fan, holes 17 allowing the fixing the hub 15 on the shaft.
  • the immobilization of the protection device on the hub 15 can then be effected by means of glue, rivets, screws or any other suitable means of assembly. After assembly on the hub 15, the protection device can rotate at the same speed as this hub 15.
  • the cylindrical wall of the ferrule 10 is arranged coaxially around the blades 12 and 13 of the fan, its axis coinciding with the axis of rotation of the motor shaft.
  • the inner parts of the blades 12, 13 are attached to a cylindrical wall 14 integral with the means 15 and coaxial with this hub 15 which has the shape of a disc.
  • the blades 12, 13 and the hub 15 were obtained in one piece, by molding a plastic material, or other moldable material, allowing to benefit from a very reduced cost price.
  • the grid 11 and the protective shell 10 can also be obtained, in one piece, by molding a plastic or other material.
  • the outer surface of the cylindrical wall of the shell 10 must be smooth. In fact, when the fan is operating, external objects or elements which may come into contact with this shell 10 will be pushed back or deflected and cannot in any way come into contact with the blades 12, 13.
  • the concentric rings 20 of the grid are arranged in a sufficiently tight manner to effectively reduce the intervals 23 between the rings 20. These rings 20 are partially in contact with the upstream edges 24 of the blades 12, 13 so as to reinforce the structure of the grid 11 as shown in FIGS. 1 and 2.
  • the fan according to the invention can comprise any number of blades, six for example, as shown in FIG. 1.
  • the protection device 30 comprising a face grid 31 and a ferrule 10, is molded in one piece with the hub 15 and the blades 32, 33.
  • the grid 31 is formed of concentric rings 34 partially in contact with the upstream edge 35 of the blades 32, 33. In this way, the positioning arms of the concentric rings 34 are eliminated, because they have become unnecessary.
  • This embodiment using a one-piece molding, is particularly advantageous and makes it possible to obtain axial fans with facial and radial protection, which can be mounted without drawback in many industrial, semi-industrial or household appliances.

Landscapes

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

Claims (6)

1. Axiallüfter mit einer Nabe (15), die wenigstens zwei Flügel (12, 13; 32, 33) trägt und mit einem zentralen Loch (16) für den Durchgang der Motorwelle versehen ist, und einer fest mit der Nabe verbundenen Schutzvorrichtung, die ein vorderseitiges Schutzgitter (11, 31) und einen radialen, mit dem Gitterfest verbundenen Schutzring (10) aufweist, wobei dieser Ring koaxial zur Motorwelle ist und die radialen Enden der Flügel (12, 13; 32, 33) umgibt und wobei ferner das vorderseitige Schutzgitter (11,31) aus Stäben (20, 34) gebildet ist, welche relativ eng angeordnet sind, um die Zwischenräume (23) zwischen diesen Stäber (20, 34) wirksam zu verkleinern und das Eindringen von Fremdkörpern zwischen die Flügel zu verhindern, dadurch gekennzeichnet, daß die Stäbe des Gitters ausschließlich konzentrische, mit der Moterwelle koaxiale Ringe (20,34) sind, daß der Schutzring ein aus einer zylindrischen und glatten Wandung gebildeter Reif (10) ist, und daß das vorderseitige Schutzgitter und der Reif (10) einteilig aus Plastikmaterial geformt sind.
2. Lüfter nach Anspruch 1, dadurch gekennzeichnet, daß das Gitter (11) mit einer zentralen Öffnung versehen ist, die einen nach innern umgebogenen Rand (22) parallel zur zylindrischen Wandung des Reifs (10) aufweist, wobei dieser Rand (22) zur Befestigung der Schutzvorrichtung an der Nabe (15) bestimmt ist.
3. Lüfter nach Anspruch 2, dadurch gekennzeichnet, daß die konzentrischen Ringe (20, 34) des Gitters (11) untereinander und mit dem Rand (22) durch Streben (21) verbunden sind.
4. Lüfter nach Anspruch 2, dadurch gekennzeichnet, daß das freie Ende der Nabe (15) einen hohlen Teil (18) umfaßt, worin der umgebogene Rand (22) eingeführt werden kann, und daß Montagemittel die Befestigung dieses Randes (22) an der ausgehöhlten Wandung (18) der Nabe (15) gestatten.
5. Lüfter nach Anspruch 1, dadurch gekennzeichnet, daß das Gitter (31), der Reif (10), die Flügel (32, 33) und die Nabe (15) einteilig geformt sind.
6. Lüfter nach Anspruch 5, dadurch gekennzeichnet, daß die konzentrischen Ringe (34) der Gitters (31) an dem anströmseitigen Rand (35) der Flügel (32, 33) befestigt sind.
EP81401532A 1980-10-17 1981-10-02 Axiallüfter mit geschützten Rotorblättern Expired EP0051005B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8022273A FR2492477A1 (fr) 1980-10-17 1980-10-17 Dispositif de protection pour ventilateur axial et ventilateur axial comportant un tel dispositif
FR8022273 1980-10-17

Publications (2)

Publication Number Publication Date
EP0051005A1 EP0051005A1 (de) 1982-05-05
EP0051005B1 true EP0051005B1 (de) 1985-06-19

Family

ID=9247036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401532A Expired EP0051005B1 (de) 1980-10-17 1981-10-02 Axiallüfter mit geschützten Rotorblättern

Country Status (7)

Country Link
US (1) US4456431A (de)
EP (1) EP0051005B1 (de)
JP (1) JPS5797099A (de)
DE (1) DE3171043D1 (de)
ES (1) ES269207Y (de)
FR (1) FR2492477A1 (de)
PT (1) PT73829B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664598A (en) * 1984-10-05 1987-05-12 Reliance Electric Company Unitized quick-assembly fan
US5203826A (en) * 1990-02-16 1993-04-20 Proform Fitness Products, Inc. Enclosed flywheel
JP3063129B2 (ja) * 1990-09-03 2000-07-12 株式会社デンソー 自動車用冷却ファン装置
US6099258A (en) * 1998-10-09 2000-08-08 Lasko Holdings, Inc. High velocity fan
DE20208250U1 (de) * 2002-05-27 2003-10-02 Hans Güntner GmbH, 82256 Fürstenfeldbruck Berührungsschutz für Ventilatoren, insbesondere von Luftkühlern
CN106413923B (zh) * 2013-11-20 2019-04-02 力奇有限公司 清洗装置
US10876545B2 (en) * 2018-04-09 2020-12-29 Vornado Air, Llc System and apparatus for providing a directed air flow

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1072189A (en) * 1911-10-17 1913-09-02 Sparks Withington Co Rotary fan.
CH165931A (de) * 1933-03-01 1933-12-15 Bbc Brown Boveri & Cie Schutzgitter für Ventilatoren.
US2091677A (en) * 1936-01-31 1937-08-31 William J Fredericks Impeller
US2361676A (en) * 1939-05-15 1944-10-31 Lin E Baker Device for impelling and propelling fluid or gas or the like
US2791373A (en) * 1956-03-16 1957-05-07 John D Wilcox Safety guard for electric fans
GB833938A (en) * 1957-04-01 1960-05-04 Caterpillar Tractor Co Self-cleaning fan guard
FR1347780A (fr) * 1962-11-19 1964-01-04 Philips Brasil Perfectionnements aux systèmes de protection pour ventilateurs ou analogues
DE1628375B2 (de) * 1966-06-11 1976-10-07 Siemens AG, 1000 Berlin und 8000 München Luefterrad aus stahlblech
DE2345539A1 (de) * 1973-09-10 1975-03-20 Siemens Ag Schutzgitter fuer axialluefter

Also Published As

Publication number Publication date
ES269207U (es) 1983-06-16
PT73829A (fr) 1981-11-01
PT73829B (fr) 1983-01-25
FR2492477B1 (de) 1985-01-04
FR2492477A1 (fr) 1982-04-23
JPS5797099A (en) 1982-06-16
ES269207Y (es) 1984-01-16
EP0051005A1 (de) 1982-05-05
US4456431A (en) 1984-06-26
DE3171043D1 (en) 1985-07-25

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