EP0051005A1 - Axiallüfter mit geschützten Rotorblättern - Google Patents

Axiallüfter mit geschützten Rotorblättern Download PDF

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Publication number
EP0051005A1
EP0051005A1 EP81401532A EP81401532A EP0051005A1 EP 0051005 A1 EP0051005 A1 EP 0051005A1 EP 81401532 A EP81401532 A EP 81401532A EP 81401532 A EP81401532 A EP 81401532A EP 0051005 A1 EP0051005 A1 EP 0051005A1
Authority
EP
European Patent Office
Prior art keywords
hub
grid
ferrule
blades
fan according
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
EP81401532A
Other languages
English (en)
French (fr)
Other versions
EP0051005B1 (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 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 fan blades.
  • an axial fan comprising a hub carrying blades, provided with a central hole for the passage of the motor shaft, and a protection device comprising a face protection grid for the blades and a radial protection ferrule, integral with the grid, this ferrule being coaxial with the motor shaft and surrounding the radial ends of the blades, is characterized in that this protection device is integral with the hub of the fan.
  • Another object of the invention is the production by molding, in one piece, of the fan protection device, means allowing the assembly of this protection device on the hub.
  • Another object of the invention is the production, in a single piece, of the protective device, by molding, of a plastic material.
  • the invention also relates to the production by molding in a single block, of the axial and radial protection device, of the hub and of the fan blades.
  • 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 done using glue, rivets, screws or any other suitable means of assembly.
  • 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 integral with the hub 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 this embodiment, in one piece, by molding a plastic material, or other moldable material, allowing to benefit from a cost price. very reduced.
  • 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, the objects or external 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 tight enough 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 disadvantage 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)
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 true EP0051005A1 (de) 1982-05-05
EP0051005B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474019A1 (de) * 1990-09-03 1992-03-11 Nippondenso Co., Ltd. Kühlungsgebläse für ein Kraftfahrzeug

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
USD327946S (en) 1990-04-19 1992-07-14 Calor S.A. Fan heater
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
US20160288175A1 (en) * 2013-11-20 2016-10-06 Nilfisk A/S Cleaning device
US10876545B2 (en) * 2018-04-09 2020-12-29 Vornado Air, Llc System and apparatus for providing a directed air flow

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH165931A (de) * 1933-03-01 1933-12-15 Bbc Brown Boveri & Cie Schutzgitter für Ventilatoren.
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
GB992363A (en) * 1962-11-19 1965-05-19 Philips Electronic Associated Improvements in and relating to guards for fans or blowers
DE1628375A1 (de) * 1966-06-11 1970-08-20 Siemens Ag Luefterrad mit zylindrischer Bremsflaeche

Family Cites Families (3)

* 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.
US2091677A (en) * 1936-01-31 1937-08-31 William J Fredericks Impeller
DE2345539A1 (de) * 1973-09-10 1975-03-20 Siemens Ag Schutzgitter fuer axialluefter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH165931A (de) * 1933-03-01 1933-12-15 Bbc Brown Boveri & Cie Schutzgitter für Ventilatoren.
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
GB992363A (en) * 1962-11-19 1965-05-19 Philips Electronic Associated Improvements in and relating to guards for fans or blowers
DE1628375A1 (de) * 1966-06-11 1970-08-20 Siemens Ag Luefterrad mit zylindrischer Bremsflaeche

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474019A1 (de) * 1990-09-03 1992-03-11 Nippondenso Co., Ltd. Kühlungsgebläse für ein Kraftfahrzeug

Also Published As

Publication number Publication date
FR2492477A1 (fr) 1982-04-23
JPS5797099A (en) 1982-06-16
PT73829A (fr) 1981-11-01
PT73829B (fr) 1983-01-25
FR2492477B1 (de) 1985-01-04
ES269207U (es) 1983-06-16
EP0051005B1 (de) 1985-06-19
DE3171043D1 (en) 1985-07-25
ES269207Y (es) 1984-01-16
US4456431A (en) 1984-06-26

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