EP0843102A2 - Lüfter mit erhöhter Schaufeloberfläche - Google Patents

Lüfter mit erhöhter Schaufeloberfläche Download PDF

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Publication number
EP0843102A2
EP0843102A2 EP19970119447 EP97119447A EP0843102A2 EP 0843102 A2 EP0843102 A2 EP 0843102A2 EP 19970119447 EP19970119447 EP 19970119447 EP 97119447 A EP97119447 A EP 97119447A EP 0843102 A2 EP0843102 A2 EP 0843102A2
Authority
EP
European Patent Office
Prior art keywords
fan
fan blades
blades
ring member
fan assembly
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.)
Withdrawn
Application number
EP19970119447
Other languages
English (en)
French (fr)
Other versions
EP0843102A3 (de
Inventor
Günther Mühlbach
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.)
Eaton Corp
Original Assignee
Eaton Corp
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 Eaton Corp filed Critical Eaton Corp
Publication of EP0843102A2 publication Critical patent/EP0843102A2/de
Publication of EP0843102A3 publication Critical patent/EP0843102A3/de
Withdrawn legal-status Critical Current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
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • F04D19/022—Multi-stage pumps with concentric rows of vanes
    • 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
    • F04D29/327—Rotors specially for elastic fluids for axial flow pumps for axial flow fans with non identical blades

Definitions

  • the present invention relates to fan assemblies of the type used for moving air for purposes of cooling, and more particularly, to fan assemblies of the type including annular hubs.
  • radiator cooling fans for moving cooling air through the radiators of vehicle internal combustion engines, and will be described in connection therewith.
  • the present invention is adapted for use with fan assemblies of various construction types (e.g., including stamped steel blades, etc.), it is especially adapted for use with plastic fans in which the entire fan assembly is formed (e.g., by injection molding) as a single, integral part, and will be described in connection therewith.
  • plastic fans in which the entire fan assembly is formed (e.g., by injection molding) as a single, integral part, and will be described in connection therewith.
  • Such a fan assembly is illustrated and described in U.S. Patent No. 5,226,783, incorporated herein by reference.
  • a fan assembly adapted to be driven by an input drive, the fan assembly comprising an annular hub adapted to be fixed to rotate with the input drive.
  • the fan assembly further comprises a plurality of fan blades.
  • the improved fan assembly is characterized by the plurality of fan blades comprising a plurality of inner fan blades fixed relative to the annular hub and extending radially outward therefrom.
  • An annular ring member is disposed about the plurality of inner fan blades and is fixed to the radially outer extent thereof.
  • the plurality of fan blades further comprises a plurality of outer fan blades fixed relative to the annular ring member and extending radially outward therefrom.
  • the plurality of inner fan blades is less in number than the plurality of outer fan blades.
  • the annular ring member comprises an inner ring member
  • the fan assembly further comprises an annular outer ring member disposed about the plurality of outer fan blades and fixed to the radially outer extent thereof.
  • the plurality of outer fan blades is equal to twice the number of the plurality of inner fan blades.
  • FIG. 1 is a front plan view of the fan assembly of the present invention.
  • FIG. 2 is a transverse cross-section taken on line 2-2 of FIG. 1, including a schematic representation of a typical input drive.
  • FIG. 3 is a transverse cross-section, similar to FIG. 2, illustrating an alternative embodiment of the invention.
  • FIG. 4 is a cross section through one of the inner blades of the present invention, looking radially inward.
  • FIG. 5 is a cross section through one of the outer blades of the present invention, looking radially inward.
  • FIG. 1 illustrates a front plan view of a fan assembly, generally designated 11, made in accordance with the present invention.
  • the fan assembly includes a stamped sheet metal spider 13, of the type which is now well known to those skilled in the art, forms no part of the present invention, and will not be described further herein.
  • the metal spider 13 is typically attached, as by a plurality of bolts (not shown) to an input drive, such as the output or body B of a viscous fan drive, generally designated V, whereby input drive torque is transmitted from a vehicle engine (not shown), by means of a shaft S, through the viscous fan drive V to the spider 13 of the fan assembly 11.
  • the fan assembly 11 of the present invention is illustrated in conjunction with a stamped metal spider, the invention is not so limited, and the input drive could be transmitted to the fan assembly 11 by a variety of other arrangements.
  • the viscous fan drive V could include a portion formed integrally with either the body B or the cover (not identified herein), and extending radially outward beyond the nominal diameter of the viscous fan drive V, with the fan assembly 11 being directly formed (such as by molding) about the outer extent of this radial portion.
  • the fan assembly 11 includes an annular hub 15 which, in the subject embodiment, is molded with the radially outer extent of the spider 13 disposed in the mold cavity, as is now conventional.
  • each of the inner blades 17 includes a leading edge 19 and a trailing edge 21.
  • annular ring member 23 is disposed to be concentric with the annular hub 15, and each of the inner blades 17 terminates at the inside diameter of the ring member 23.
  • the annular ring member 23 is simply a cylindrical, relatively thin (in the radial direction) member. It is preferred that the entire fan assembly 11 be formed as a single, molded part, with the radially outer extent of the inner blades 17 merely "flowing" or blending into the inside diameter of the annular ring member 23.
  • the fan assembly 11 could comprise steel stampings, in which case it would be necessary to braze or solder or weld the fan blades to the annular hub and to the middle and outer ring members 23 and 31.
  • the essence of the present invention is the configuration of the fan, rather than the materials involved or the method of fabrication.
  • Attached to the outside diameter of the annular ring member 23 is a plurality of outer fan blades 25, and in the subject embodiment, there are ten of the outer blades 25, i.e., twice the number of inner fan blades 17.
  • the number of outer blades 25 it should be understood that it is not an essential feature of the present invention for the number of outer blades 25 to be twice the number of inner blades 17. What is essential to the present invention is simply that there be more of the outer blades 25 than there are of the inner blades 17, thereby increasing the blade area (and air flow, cooling efficiency, etc.), compared to the blade area which would exist if the five inner blades 17 merely extended to the full diameter of the fan assembly 11, as in the prior art.
  • Each of the outer fan blades 25 includes a leading edge 27 and a trailing edge 29.
  • annular outer ring member 31 Disposed about the outer fan blades 25, and attached to the radially outer extent thereof, is an annular outer ring member 31, the construction and function of which are now generally well known in the art. It should be understood that the outer ring member 31 is not an essential feature of the present invention, but is included in the subject embodiment for the same reasons (e.g., airflow efficiency) that such rings are included in many fans in commercial production now .
  • the inner fan blades 17 and the outer fan blades 25 have the same blade profile and blade pitch, although the present invention is not so limited. There may be various applications where it would be desirable to provide one particular blade profile and/or pitch for the inner blades 17, and a substantially different blade profile and/or pitch for the outer blades 25, and it is an important aspect of the present invention that this sort of "tailoring" of the blades can now be accomplished with the present invention.
  • each of the inner fan blades 17 is "aligned" with one of the outer fan blades 25, such that it appears to be one continuous fan blade. If the fan assembly were to be fabricated from metal stampings, it is quite possible that each of the inner blades and its corresponding outer blade would comprise a single blade passing through an opening in the middle ring member, thus reducing the total number of parts and the amount of brazing, etc.
  • the invention is not limited to each of the inner blades being aligned with one of the outer blades, especially if the number of outer blades 25 is something other than twice the number of inner blades 17. Also, in FIG.
  • the middle ring 23 is about half-way between the hub 15 and the outer ring 31, such that the radial lengths of the inner blades 17 and the outer blades 25 is about equal.
  • Such a dimensional relationship is not essential to the invention, however, and those skilled in the art will recognize that the radial location of the middle ring 23, and the relative numbers of inner and outer blades 17 and 25, may be selected to maximize the fan performance, for a given fan outside diameter.
  • FIG. 3 there is illustrated an alternative embodiment of the present invention in which the middle ring member is not simply a relatively thin, cylindrical member.
  • an annular ring member 33 which is generally cylindrical, and adjacent thereto is a conical ring member 35.
  • the outer fan blades 25 extend radially from the conical ring member 35, and terminate at the outer ring member 31 in the same manner as described in connection with FIG. 2.
  • Disposed between the ring members 33 and 35 there are preferably a plurality of reinforcing ribs 37.
  • each set of blades will include more blades than the set of blades disposed immediately radially inward therefrom.
  • each set of blades can have a different pitch and profile than the blades in any of the other sets.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP19970119447 1996-11-13 1997-11-06 Lüfter mit erhöhter Schaufeloberfläche Withdrawn EP0843102A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US74858796A 1996-11-13 1996-11-13
US748587 1996-11-13

Publications (2)

Publication Number Publication Date
EP0843102A2 true EP0843102A2 (de) 1998-05-20
EP0843102A3 EP0843102A3 (de) 1999-02-24

Family

ID=25010085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970119447 Withdrawn EP0843102A3 (de) 1996-11-13 1997-11-06 Lüfter mit erhöhter Schaufeloberfläche

Country Status (3)

Country Link
EP (1) EP0843102A3 (de)
JP (1) JPH10141285A (de)
BR (1) BR9705376A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102269180A (zh) * 2011-07-13 2011-12-07 广东志高空调有限公司 一种叶轮结构及贯流风机
BE1030046B1 (fr) * 2021-12-17 2023-07-17 Safran Aero Boosters Roue mobile a plusieurs rangees d’aubes
BE1030473B1 (fr) * 2022-04-21 2023-11-27 Safran Aero Boosters Rotor a plusieurs rangees d’aubes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100551582B1 (ko) * 1998-12-31 2006-05-17 한라공조주식회사 축류팬
KR20120096072A (ko) 2009-06-28 2012-08-29 발뮤다 가부시키가이샤 축류팬

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4569631A (en) 1984-08-06 1986-02-11 Airflow Research And Manufacturing Corp. High strength fan
US5226783A (en) 1990-07-30 1993-07-13 Usui Kokusai Sangyo Kaisha Ltd. Axial flow fan with centrifugal elements
US5358382A (en) 1993-07-21 1994-10-25 Eaton Corporation Fan and fan drive assembly

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986151A (en) * 1933-08-05 1935-01-01 Internat Engineering Inc Fan
GB460781A (en) * 1935-08-06 1937-02-04 William Wycliffe Spooner Improvements in or relating to fans, rotors, and the like
US2790596A (en) * 1953-08-06 1957-04-30 Leo M Stirling Dual fan construction
DE2030238A1 (de) * 1970-06-19 1971-12-23 Daimler Benz Ag Laufrad für Axialgebläse
FR2175319A5 (de) * 1972-03-09 1973-10-19 Air Ind
DE8801750U1 (de) * 1988-02-11 1989-06-08 Robert Bosch Gmbh, 7000 Stuttgart Axiallüfter
DE9403217U1 (de) * 1994-02-26 1995-06-29 Behr Gmbh & Co, 70469 Stuttgart Axiallüfter
US5454695A (en) * 1994-07-05 1995-10-03 Ford Motor Company High output engine cooling fan
US5755557A (en) * 1995-08-03 1998-05-26 Valeo Thermique Moteur Axial flow fan

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4569631A (en) 1984-08-06 1986-02-11 Airflow Research And Manufacturing Corp. High strength fan
US5226783A (en) 1990-07-30 1993-07-13 Usui Kokusai Sangyo Kaisha Ltd. Axial flow fan with centrifugal elements
US5358382A (en) 1993-07-21 1994-10-25 Eaton Corporation Fan and fan drive assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102269180A (zh) * 2011-07-13 2011-12-07 广东志高空调有限公司 一种叶轮结构及贯流风机
BE1030046B1 (fr) * 2021-12-17 2023-07-17 Safran Aero Boosters Roue mobile a plusieurs rangees d’aubes
BE1030473B1 (fr) * 2022-04-21 2023-11-27 Safran Aero Boosters Rotor a plusieurs rangees d’aubes

Also Published As

Publication number Publication date
JPH10141285A (ja) 1998-05-26
EP0843102A3 (de) 1999-02-24
BR9705376A (pt) 1999-09-21

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