EP1416164A2 - Ventilateur moulé à deux-pièces - Google Patents

Ventilateur moulé à deux-pièces Download PDF

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Publication number
EP1416164A2
EP1416164A2 EP20030256648 EP03256648A EP1416164A2 EP 1416164 A2 EP1416164 A2 EP 1416164A2 EP 20030256648 EP20030256648 EP 20030256648 EP 03256648 A EP03256648 A EP 03256648A EP 1416164 A2 EP1416164 A2 EP 1416164A2
Authority
EP
European Patent Office
Prior art keywords
bolts
relative positioning
overlapping
hub
positioning plane
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Withdrawn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
EP20030256648
Other languages
German (de)
English (en)
Other versions
EP1416164A3 (fr
Inventor
Theodore A. Malott
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.)
BorgWarner Inc
Original Assignee
BorgWarner Inc
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 BorgWarner Inc filed Critical BorgWarner Inc
Publication of EP1416164A2 publication Critical patent/EP1416164A2/fr
Publication of EP1416164A3 publication Critical patent/EP1416164A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/21—Manufacture essentially without removing material by casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/51—Building or constructing in particular ways in a modular way, e.g. using several identical or complementary parts or features
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49327—Axial blower or fan

Definitions

  • the invention relates generally to fan drive systems and more specifically, fan drive systems with two-piece molded fans.
  • Cooling systems are used on vehicles today to provide cooling to an engine during operation.
  • a typical cooling system comprises a water pump and a fan drive.
  • Fan drives are typically driven by the engine crankshaft at a fixed ratio to cool engine coolant as it flows through a radiator. More specifically, a fan that is rigidly mounted to the fan drive generates the airflow as a function of engine crankshaft rotational speed for cooling the radiator.
  • all part surfaces may be divided up so that some can be molded by one die, and the rest by the other die, and the pair of die (or molds) can be pushed together and pulled apart freely along the same central axis. This represents the absolute minimum in terms of molds used (two) to produce the parts, and the number of pieces (one) in the part produced.
  • the number of fan blade configurations that can be made using a one-piece mold is thus limited to configurations that can be pulled apart freely along the same central axis.
  • overlapping blade fans cannot currently be made using the axial draw technique because the blade overlap would prevent part removal if the whole fan was cast as one piece.
  • a two-piece fan integrated with the fan drive is produced having overlapping fan blades using an axial draw technique.
  • the two halves are then removed from the mold and bolted together to form the two-piece fan.
  • a fan blade By molding the fan as two pieces, a fan blade can be produced that wraps around the outside of the housing and overlaps with each other.
  • the molding can be done within one die casting tool having a front and rear section or can be done with two separate die casting tools.
  • Figure 1 is a perspective view of a two-piece fan assembly according to one preferred embodiment of the present invention.
  • Figure 2 is an exploded view of the two-piece fan assembly
  • Figure 3 is a front view of Figure 1;
  • Figure 4 is a side view of Figure 1 indicating mold release directions.
  • Figures 1-4 indicates a two-piece fan assembly 10 according to a preferred embodiment of the present invention.
  • the two-piece fan assembly 10 is generally defined about a central axis A, and also spins about the same axis in operation.
  • the two-piece fan assembly 10 is preferably formed of die cast aluminum or molded plastic, although other materials may be used as those of skill in the art recognize.
  • the structural foundation of the fan assembly 10 is the central hub 12, which is basically an annular disk that extends radially outward from a center bore 14.
  • the center bore 14 is the attachment point of a motor shaft (not shown) that spins the fan assembly 10 about central axis A.
  • the motor shaft, and associated housing have a conventional arrangement well known to those of skill in the art and will not be discussed further in this application.
  • each fan blade 16 Disposed about the central hub 12 are a plurality of circumferentially displaced, radially disposed fan blades 16 having a radially inner portion 32 of their bases integrally molded with, and supported by, the central hub 12. Also note that each fan blade 16 has a part of the front side portion 34 blocked by the next adjacent front side portion 34 when a person views the fan blade 16 from the side as in Figure 3 (i.e. there is at least a partial overlap of the blades 16 as viewed from the front or back).
  • This overlapping blade 16 structure enables the fan assembly 10 to provide increased air flow as compared with fan assemblies having non-overlapping blade structures.
  • the fan assembly 10 consists of a front portion 20 (left half of Figure 4) and a rear portion 22 (right half of Figure 4) fastened together through a coupling device known to those of skill in the art. Both the front portion 20 and rear portion 52 have a substantially flat region 50a, 50b that is defined by and corresponding to the relative positioning plane 52.
  • the central hub 12 consists of a front hub portion 12a and a rear hub portion 12b.
  • the fan blades 16 consist of a front fan blade portion 16a and a rear fan blade portion 16b.
  • each front fan blade portion 16a is coupled to a rear fan blade portion 16b such that they form a relatively smooth coupling along and between each radially outward portion 30, radially inward portion 32, front side portion 34 and rear side portion 36 when the front portion 20 is coupled to the rear portion 22.
  • the front portion 20 and rear portion 22 are formed with a plurality of bolt holes 25a, 25b.
  • the boltholes 25a, 25b could also be formed in a post-casting step using a drill or similar equipment.
  • the flat portions 50a, 50b are first aligned along either side of the relative positioning plane 52.
  • a bolt 24 is then inserted through a corresponding bolthole 25a and 25b to secure the front portion 20 to the rear portion 22.
  • the bolt 24 may be secured within the respective pair of boltholes 25a, 25b by a corresponding nut (not shown) or other methods well known in the art. While the embodiments shown in Figures 1-4 indicate 12 bolts 24 and 12 corresponding bolt holes 25a, 25b circumferentially placed around the hub portions 12a, 12b, the number and location of the bolts 24 and bolt holes 25a, 25b may vary as one of skill in the art would appreciate.
  • bolts 24 are shown with their head portions 24a, closely coupled with the front portion 20, one of skill would recognize that it is equally plausible that the bolt 24 is secured with the head portion 24a closely coupled with the rear portion 22 to secure the front portion 20 to the rear portion 22.
  • the fan assembly 10 is formed by die casting the front portion 20 and rear portion 22 as two separate pieces within a corresponding die casting tool separated along a relative positioning plane 52.
  • the die cast tool separates, as indicated by the arrows, along the axis A away from the relative positioning plane 52, thereby allowing the two portions 20, 22 to be removed from the tooling.
  • the overlapping structure of the fan blades 16 would prevent part removal if the fan assembly 10 were cast as a single part using an axial draw technique.
  • the front section of the die cast tool separates from the front portion 20 along the axis A away from the relative positioning plane 52 such that the front section of the tool does not contact the front section of the overlapping blades 16a.
  • the rear section of the die cast tool separates from the rear portion 22 along axis A away from the relative positioning plane 52 such that the rear section does not contact the rear section of the overlapping blades 16b.
  • front portion 20 and rear portion 22 could be formed within two separate die casting tools using the axial draw technique.
  • the present invention presents a simple, easy and efficient procedure for casting a fan assembly 10 having an overlapping fan blade 16 structure using an axial draw technique.
  • the technique presented in the present invention can be applied to a potentially infinite variety of overlapping fan blade designs. All that is required to incorporate this technique is to determine a relative positioning plane 52 within the fan assembly 10 cutting through the fan blades 16 and hub 12 such that the die cast tool can be pulled apart along the axis A of the fan assembly 10 after the portions 20, 22 are die cast.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP03256648A 2002-11-04 2003-10-22 Ventilateur moulé à deux-pièces Withdrawn EP1416164A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US287209 2002-11-04
US10/287,209 US20040083609A1 (en) 2002-11-04 2002-11-04 Two-piece molded fan

Publications (2)

Publication Number Publication Date
EP1416164A2 true EP1416164A2 (fr) 2004-05-06
EP1416164A3 EP1416164A3 (fr) 2005-04-06

Family

ID=32093600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03256648A Withdrawn EP1416164A3 (fr) 2002-11-04 2003-10-22 Ventilateur moulé à deux-pièces

Country Status (3)

Country Link
US (1) US20040083609A1 (fr)
EP (1) EP1416164A3 (fr)
JP (1) JP2004156591A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015077988A1 (fr) * 2013-11-29 2015-06-04 Black & Decker Inc. Ponceuse munie d'un ventilateur en deux parties

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080150321A1 (en) * 2006-11-01 2008-06-26 Colin Neale Vehicle having aerodynamic fan elements
US7695050B2 (en) * 2006-11-01 2010-04-13 Colin Neale Vehicle having aerodynamic fan elements
JP2012188076A (ja) 2011-03-14 2012-10-04 Yorozu Corp 車両用のアーム部品とその製造方法
JP5728589B2 (ja) * 2011-10-17 2015-06-03 本田技研工業株式会社 インペラの製造方法
JP2014043780A (ja) 2012-08-24 2014-03-13 Sanyo Denki Co Ltd 直列型軸流ファン
TWI574815B (zh) * 2014-01-17 2017-03-21 Sunon Electronics (Foshan) Co Ltd Making impeller mold and impeller
JP6309884B2 (ja) * 2014-11-25 2018-04-11 三菱重工業株式会社 インペラ、及び回転機械

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2366251A (en) * 1940-12-17 1945-01-02 Fullemann Johann Blower impeller
US3285187A (en) * 1965-11-05 1966-11-15 Msl Ind Inc Impeller for use in centrifugal pump or blower and a method of manufacture thereof
US3893817A (en) * 1973-01-02 1975-07-08 Outboard Marine Corp Die castable centrifugal fan

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017820A (en) * 1911-07-24 1912-02-20 Henry M Svebilius Propeller.
US3506061A (en) * 1965-06-10 1970-04-14 Gen Electric Apparatus for vacuum-casting a plurality of metal parts in a single mold
DE2026290C3 (de) * 1970-05-29 1975-05-28 Fa. Theodor Zeise, 2000 Hamburg Propeller
IT1080762B (it) * 1977-07-21 1985-05-16 Pirelli Procedimento e dispositivo di stampaggio di corpi cavi in materiale plasto o elastomerico
US4248288A (en) * 1979-08-20 1981-02-03 Anatol Michelson Fusion process for forming shell cores
DE3200193A1 (de) * 1982-01-07 1983-07-14 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren zur herstellung eines hohlen giessereikerns
US5558803A (en) * 1991-08-29 1996-09-24 Nippon Shokubai Co., Ltd. Electrorheological fluid with improved properties comprising composite polymer
US5352089A (en) * 1992-02-19 1994-10-04 Nippondenso Co., Ltd. Multi-blades fan device
US5588803A (en) * 1995-12-01 1996-12-31 General Motors Corporation Centrifugal impeller with simplified manufacture
US6224335B1 (en) * 1999-08-27 2001-05-01 Delphi Technologies, Inc. Automotive air conditioning fan assembly
US6318964B1 (en) * 2000-09-08 2001-11-20 Sheng Shyan Yang Complex cooling fan with increased cooling capacity
US6619923B2 (en) * 2000-11-29 2003-09-16 Industrial Technology Research Institute Integrated 3-D blade structure
US6572336B2 (en) * 2001-09-28 2003-06-03 Sunonwealth Electric Machine Industry Co., Ltd. Impeller structure
TW514353U (en) * 2002-03-28 2002-12-11 Delta Electronics Inc Composite heat-dissipating device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2366251A (en) * 1940-12-17 1945-01-02 Fullemann Johann Blower impeller
US3285187A (en) * 1965-11-05 1966-11-15 Msl Ind Inc Impeller for use in centrifugal pump or blower and a method of manufacture thereof
US3893817A (en) * 1973-01-02 1975-07-08 Outboard Marine Corp Die castable centrifugal fan

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015077988A1 (fr) * 2013-11-29 2015-06-04 Black & Decker Inc. Ponceuse munie d'un ventilateur en deux parties
US9102048B2 (en) 2013-11-29 2015-08-11 Black & Decker Inc. Sander having two-piece fan
US9545712B2 (en) 2013-11-29 2017-01-17 Black & Dekcer Inc. Sander having two-piece fan

Also Published As

Publication number Publication date
EP1416164A3 (fr) 2005-04-06
JP2004156591A (ja) 2004-06-03
US20040083609A1 (en) 2004-05-06

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