US3647317A - Fiberglass fan assembly - Google Patents

Fiberglass fan assembly Download PDF

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Publication number
US3647317A
US3647317A US21009A US3647317DA US3647317A US 3647317 A US3647317 A US 3647317A US 21009 A US21009 A US 21009A US 3647317D A US3647317D A US 3647317DA US 3647317 A US3647317 A US 3647317A
Authority
US
United States
Prior art keywords
fan
blade
spar
skin
hub
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 - Lifetime
Application number
US21009A
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English (en)
Inventor
Donn B Furlong
Samuel Luzaich
James F Forchini
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.)
CUSTODIS-ECODYNE Inc
FLUOR PRODUCTS CO Inc
Original Assignee
FLUOR PRODUCTS CO 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 FLUOR PRODUCTS CO Inc filed Critical FLUOR PRODUCTS CO Inc
Application granted granted Critical
Publication of US3647317A publication Critical patent/US3647317A/en
Assigned to CUSTODIS-ECODYNE, INC. reassignment CUSTODIS-ECODYNE, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ECODYNE CORPORATION A DE CORP
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
    • 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
    • F04D29/388—Blades characterised by construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/32—Rotors
    • B64C27/46—Blades
    • B64C27/473—Constructional features

Definitions

  • ABSTRACT A fan assembly including a fan hub engaged with a driving means for rotation, a streamlined hub cover and a plurality of fan blades attached to the fan hub.
  • the fan blades have an exterior fiberglass skin, filled with high-density polyurethane foam, and a reinforcing steel spar positioned within the exterior skin.
  • the spar is fabricated in a tapered H cross section to provide maximum strength without impairing the efficiency of an optimum airfoil.
  • This invention relates to fans, and more particularly to axial flow fans or cooling towers. Although disclosed for use on water-cooling towers, the instant fan blades and assemblies are readily applied to-dry-surface heat exchangers and other similar devices, depending upon air movement for cooling.
  • a conventional cooling tower installation of the type applicable to the present invention, is illustrated in US. Pat. No. 3,345,048, assigned to the same assignee as the instant invention.
  • Airflow induced by a cooling tower fan, enters the tower through a set of louvers, and is drawn through the tower to cool falling and splashing water droplets and water films (on tower filling) by intimate contact with the air. Cooling is brought about by heat and mass transfer: by evaporation and sensible heat transfer from the water droplets and films.
  • the invention pertains to an improved cooling tower fan blade structure.
  • the conventional cooling tower fan blades have heretofore been constructed of cast or extruded aluminum, fabricated stainless steel, and cast or hollow molded plastic. Metals are subject to corrosion, stress cracking, pitting and erosion. Several of these problems are also found in plastics. Metallic fan blades are subject to fatigue and skin cracking from vibration. Optimum blade helix form and blade widths cannot be used because of metal casting or fabrication limitations. The fan blade of the instant invention solves these and other problems that have plagued the industry.
  • the general purpose of this invention is to provide a fan blade having unique optimum design features and operating efficiency, and possessing the advantages of similarly employed prior art devices and none of the above-described disadvantages.
  • Another object is to provide a cooling tower fan blade which will resist corrosion, stress cracking, pitting and ero- SIOI'I.
  • a further object is to provide a cooling tower fan blade in which stresses are kept low enough to be within the endurance limits of the materials for the prevailing loading conditions; and the blade frequencies are well under the operating frequencies apt to be encountered in service.
  • the novel fan assembly of the present invention provides a fan hub engaged with a driving means for rotation, a streamlined hub cover and a plurality of fan blades attached to the fan hub.
  • the fan blades have an exterior fiberglass reinforced polyester or epoxy resin skin, filled with a high density polyurethane foam, and a reinforcing steel spar positioned within the exterior skin.
  • the spar is fabricated in a tapered H cross section.
  • the fiberglass skin offers exceptional corrosion and abrasion resistance under severe cooling tower environments. Fiberglass fabrication techniques further allow the exacting design, complicated by blade helix and chord width variation, to be duplicated accurately and economically.
  • the high density polyurethane foam reinforces the airfoil profile over the entire blade length, effectively transfers applied blade loads to the spar, and enhances the torsional stability and impact strength of the blade.
  • FIG. 1 is a fragmentary top plan view, partially broken away, of the fan assembly in accordance with the present invention
  • FIG. 2 is an enlarged sectional elevational view of the fan blade to hub connection in accordance with the present invention
  • FIG. 3 is an enlarged top plan view, partially broken away, of the fan blade in accordance with the instant invention.
  • FIG. 4 is a sectional view taken along line 4-4 of FIG. 3 showing the novel interior construction of the fan blade.
  • the improved fan assembly 10 comprises a fan hub 30 secured to a driven shaft 35, fan blade support arms 40 and fan blades 50 rigidly secured to the blade supports 40.
  • Shaft 35 is the conventional output shaft of an electric motor, speed reducer, gear motor or similar power source, not shown.
  • the shape of a fan blade is determined by the desired airmoving capability.
  • the blade theoretically should increase in width proceeding from the outer tip towards the hub.
  • the leading and trailing edges would resemble two hyperbolic envelopes approaching infinity at the fan center of rotation.
  • the blade angle similarly increases from relatively flat at the tip to a greater angle as the fan center is approached.
  • An airfoil (or family of airfoils) is utilized thru the blade length to obtain the desired lift and drag characteristics for given performance, and yet provide geometrical blade sections having sufficient strength to carry imposed loadings within suitable stress levels.
  • the instant invention enables use of optimum airfoil sections thru the blade length, relatively unrestricted by the usual manufacturing limitations of casting or forming.
  • fan blade 50 consists of an exterior skin 52, a filler means 54 and a reinforcing spar 56.
  • Exterior skin 52 having upper and lower skin portions 57 and 58 respectively, is a fiberglass airfoil of synthetic resin laminate (i.e., polyester or epoxy resin) consisting of an exterior gel-coat (highly filled and pigmented polyester resin) and a synthetic resin/glass mat.
  • Fiberglass offers exceptional corrosion and abrasion resistance under severe cooling tower environments. Fiberglass fabrication techniques further allow the exacting design to be duplicated accurately.
  • the open area or cavity within exterior skin 52 is filled with a high density (5-15 pounds/cu. ft.) rigid polyurethane foam. The foam increases the blade stiffness and reinforces the airfoil profile over the entire blade length.
  • the blades are reinforced with a high-strength alloy steel spar 56.
  • Spar 56 has an H' shape cross section and tapers as it extends towards the tip of the blade. As seen in FIGS. 3 and 4 the adjacent legs slant towards each other and taper in width and depth progressing outward from the hub to provide maximum spar section within the exterior skin. All combined loads are carried by the spar over the entire blade length.
  • the spar 56 may be both mechanically interlocked and chemically bonded to the foam filler 54 to provide a common action between the steel reinforcement and the skin.
  • the H cross section spar provides maximum strength and stiffness for bending moments from air and blade weight loadings; and centrifugal forces and superior resistance to torsional loadings.
  • the H section enables use of thin efficient air foils not encumbered by requirements of a thick blade just to cover the spar.
  • the thicker the blade the greater the aerodynamic drag-and ultimately the greater the horsepower to operate the fan.
  • this spar results in manufacturing and operating economies.
  • flange 44 for attachment to the fan hub.
  • Support arm 40 extends outwardly from fan hub 30 and has a flange 42, at its outer end, for field attachment to flange 44.
  • flanges 42 and 44 are bolted together in a conventional manner to insure a rigid attachment of blade 50 to hub 30.
  • Conventional tangentially slotted bolt holes may be provided in flange 44 to allow easy assembly and fan pitch adjustment.
  • a streamlined fiberglass reinforced polyester or epoxy resin hub cover 20 may be fastened to the hub through angle brackets 60 at each hub arm 40 in a conventional manner as shown in FIG. 2.
  • Hub cover 20 provides an effective seal against back flow of air at the fan center, to improve fan performance.
  • Cover 20 also provides a smooth fairing to seal air losses at the inner or widest portion of the fan blades.
  • Fiberglass provides a great flexibility in fabricated forms, and can be produced in aerodynamically clean shapes and can be readily balanced.
  • this invention provides an efficient solution to long standing problems connected with the operation of a conventional cooling tower.
  • blades may be fabricated for large diameter fans, i.e., to 36 feet in diameter, without excess structural support or power requirements.
  • the fan blades of the instant invention resist corrosion, stress cracking, pitting and erosion while providing long term endurance under severe fatigue loading conditions.
  • the novel reinforced fiberglass blades are corrosion resistant and may be driven with low operating horsepower and require minimum field service and replacement.
  • a fan blade comprising:
  • a fiberglass exterior skin including upper and lower skin portions, defining a cavity therebetween;
  • a spar having a longitudinally extending l-l" section, located within said cavity and spaced from said exterior skin, extending for substantially the full span of said exterior skin to carry substantially the full load imposed on the blade;
  • filler means substantially filling said cavity, effective to transfer applied blade loads to said spar.
  • a fan blade comprising:
  • an exterior skin of generally airfoil shape, including an upper and lower skin portion defining a cavity therebetween, said exterior skin being synthetic resin reinforced with fiberglass mat;
  • a tapered longitudinally extending spar having an H cross section, located within said cavity and spaced from said exterior skin, extending for substantially the full span of said cavity, to carry substantially the full load imposed on the blade;
  • filler means of polyurethane foam substantially filling said cavity effective to transfer applied blade loads to said spar;
  • a fan assembly for a cooling tower comprising:
  • a fan hu b enga ed with and rotated by a driving means
  • cover means positioned so as to shroud the back flow area at the fan center;
  • said fan blades including a hollow exterior fiberglass skin of generally airfoil shape; a spar, having a longitudinally extending H section, located within said exterior skin and spaced therefrom extending for substantially the full span of said exterior skin, to carry substantially the full load imposed on said blades into said fan hub; and filler means, substantially filling said open area, effective to transfer applied blade loads to said spar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US21009A 1970-03-19 1970-03-19 Fiberglass fan assembly Expired - Lifetime US3647317A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2100970A 1970-03-19 1970-03-19

Publications (1)

Publication Number Publication Date
US3647317A true US3647317A (en) 1972-03-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US21009A Expired - Lifetime US3647317A (en) 1970-03-19 1970-03-19 Fiberglass fan assembly

Country Status (7)

Country Link
US (1) US3647317A (es)
JP (1) JPS548883B1 (es)
CA (1) CA923473A (es)
DE (1) DE2113019C3 (es)
ES (1) ES195104Y (es)
GB (1) GB1330565A (es)
ZA (1) ZA711112B (es)

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874820A (en) * 1974-04-08 1975-04-01 United Aircraft Corp Hingeless in-plane rotor blade design
US4046489A (en) * 1975-10-08 1977-09-06 Eagle Motive Industries, Inc. Aerodynamic fan blade
US4130380A (en) * 1976-05-13 1978-12-19 Kaiser Heinz W Wind powered turbine and airfoil construction
US4278401A (en) * 1977-12-05 1981-07-14 Fiat Societa Per Azioni Blade for wind motors
US4305699A (en) * 1979-02-15 1981-12-15 Centro Ricerche Fiat S.P.A. Blade for a wind motor
DE3138312A1 (de) * 1980-10-02 1982-06-16 United Technologies Corp., 06101 Hartford, Conn. "verfahren zur herstellung von faserverstaerkten gegenstaenden"
US4366387A (en) * 1979-05-10 1982-12-28 Carter Wind Power Wind-driven generator apparatus and method of making blade supports _therefor
US4524499A (en) * 1981-11-16 1985-06-25 Trw Inc. Method of fabricating an aircraft propeller assembly with composite blades
US4639284A (en) * 1983-03-18 1987-01-27 Societe Nationale Industrielle Aerospatiale Process for manufacturing a variable pitch multi-blade propeller by molding resin-impregnated fails around a preform
US4648921A (en) * 1980-10-02 1987-03-10 United Technologies Corporation Method of making fiber reinforced articles
EP0219889A2 (en) * 1985-10-23 1987-04-29 The Boeing Company Hybrid thrust reverser cascade basket and method of producing
US4674951A (en) * 1984-09-06 1987-06-23 Societe Nationale D'Etude et de Construction de Meteur D'Aviation (S.N.E.C.M.A.) Ring structure and compressor blow-off arrangement comprising said ring
US4789304A (en) * 1987-09-03 1988-12-06 United Technologies Corporation Insulated propeller blade
US4797066A (en) * 1986-01-28 1989-01-10 Stroemberg Karl Otto Turbine wheel having hub-mounted elastically deformable blade made of reinforced polymeric composite material
US4852805A (en) * 1983-12-30 1989-08-01 The Boeing Company Hybrid thrust reverser cascade basket and method
WO1992002410A1 (en) * 1990-07-27 1992-02-20 The Marley Cooling Tower Company Plastic fan blade for industrial cooling towers and method of making same
WO1992002731A1 (en) * 1990-07-27 1992-02-20 The Marley Cooling Tower Company Fan blade having abrasion resistant leading edge
US5127802A (en) * 1990-12-24 1992-07-07 United Technologies Corporation Reinforced full-spar composite rotor blade
US5269658A (en) * 1990-12-24 1993-12-14 United Technologies Corporation Composite blade with partial length spar
US5564901A (en) * 1993-12-14 1996-10-15 The Moore Company Low noise fan
US5683636A (en) * 1995-07-19 1997-11-04 Ventilatoren Sirocco Howden B.V. Method of fan blade manufacture
EP1035330A2 (en) * 1999-03-08 2000-09-13 Matsushita Electric Industrial Co., Ltd. Impeller for blower, its manufacturing method, and blower
US6155784A (en) * 1997-01-09 2000-12-05 Cartercopters, Llc. Variable pitch aircraft propeller
US6598650B1 (en) * 2000-06-14 2003-07-29 Newell Window Furnishings, Inc. Hollow, rigid vanes for door and window coverings
WO2010115637A1 (de) * 2009-04-11 2010-10-14 W & S Management Gmbh & Co. Kg Verstärkungselement zur verwendung mit einer ventilatornabe
US20110150661A1 (en) * 2009-12-18 2011-06-23 Magna International Inc. Sheet molding compound with cores
US20120063906A1 (en) * 2009-05-20 2012-03-15 Henrik Witt Fan Blade
US20150226157A1 (en) * 2014-02-10 2015-08-13 Mra Systems, Inc. Thrust reverser cascade
CN105121862A (zh) * 2013-02-13 2015-12-02 株式会社Ihi 风扇叶片的制造方法和制造装置
FR3025748A1 (fr) * 2014-09-11 2016-03-18 Gea Batignolles Technologies Thermiques Ventilateur pour aerorefrigerant.
CN105485051A (zh) * 2015-09-29 2016-04-13 常州倍安特动力机械有限公司 一种发电装置冷却用风扇
US20160215756A1 (en) * 2014-05-06 2016-07-28 Shenzhen Bangzhong Wind Power Generation Technology Co., Ltd. Wind turbine generator compatible with high and low wind speeds
AU2015202728B2 (en) * 2009-05-20 2017-03-30 W & S Management Gmbh & Co. Kg Fan blade
US9945389B2 (en) 2014-05-05 2018-04-17 Horton, Inc. Composite fan
US20190211841A1 (en) * 2018-01-05 2019-07-11 Aurora Flight Sciences Corporation Composite Fan Blades with Integral Attachment Mechanism

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3203557A1 (de) * 1982-02-03 1983-08-11 Hudson Products Corp., 77036 Houston, Tex. Axialgeblaese mit rotorblaettern
USRE34207E (en) * 1986-11-19 1993-03-30 General Electric Company Counterrotating aircraft propulsor blades
DE3738785A1 (de) * 1986-11-19 1988-05-26 Gen Electric Gegenlaeufig rotierende flugzeug-antriebsschaufeln
US4971641A (en) * 1988-11-14 1990-11-20 General Electric Company Method of making counterrotating aircraft propeller blades
GB2279114A (en) * 1993-06-15 1994-12-21 Nuaire Ltd Fan impeller blade
NL9402187A (nl) * 1994-12-22 1996-08-01 Helpman Intellectual Propertie Huishoudelijke ventilator.
NL9402191A (nl) * 1994-12-22 1996-08-01 Helpman Intellectual Propertie Ventilator.
DE102004010397A1 (de) * 2004-03-03 2005-09-22 Howden Ventilatoren Gmbh Schaufel für das Laufrad eines Ventilators
CN111674546B (zh) * 2020-06-19 2023-01-24 南京航空航天大学 一种适用于中小型无人倾转旋翼飞行器的旋翼气动外形

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2400649A (en) * 1942-02-27 1946-05-21 Autogiro Co Of America Molded airfoil, especially for sustaining rotors
US2484141A (en) * 1947-01-09 1949-10-11 United Aircraft Corp Skin stressed laminated fiberglas rotor blade
US2588570A (en) * 1946-10-31 1952-03-11 Autogiro Co Of America Blade construction for aircraft sustaining rotors
US2767461A (en) * 1951-03-27 1956-10-23 Lockheed Aircraft Corp Method of making propeller or rotor blade
US3021246A (en) * 1957-05-17 1962-02-13 Hutter Ulrich Process for producing a structure of fiber reinforced plastic material
US3321019A (en) * 1965-10-22 1967-05-23 United Aircraft Corp Fiberglass blade
US3476625A (en) * 1966-05-03 1969-11-04 Parsons Corp Method of forming a composite spar about a metal tube
US3480373A (en) * 1966-11-01 1969-11-25 Cooling Dev Ltd Fans

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2400649A (en) * 1942-02-27 1946-05-21 Autogiro Co Of America Molded airfoil, especially for sustaining rotors
US2588570A (en) * 1946-10-31 1952-03-11 Autogiro Co Of America Blade construction for aircraft sustaining rotors
US2484141A (en) * 1947-01-09 1949-10-11 United Aircraft Corp Skin stressed laminated fiberglas rotor blade
US2767461A (en) * 1951-03-27 1956-10-23 Lockheed Aircraft Corp Method of making propeller or rotor blade
US3021246A (en) * 1957-05-17 1962-02-13 Hutter Ulrich Process for producing a structure of fiber reinforced plastic material
US3321019A (en) * 1965-10-22 1967-05-23 United Aircraft Corp Fiberglass blade
US3476625A (en) * 1966-05-03 1969-11-04 Parsons Corp Method of forming a composite spar about a metal tube
US3480373A (en) * 1966-11-01 1969-11-25 Cooling Dev Ltd Fans

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2502004A1 (de) * 1974-04-08 1975-10-16 United Aircraft Corp Rotorblatt fuer gelenklosen rotor
US3874820A (en) * 1974-04-08 1975-04-01 United Aircraft Corp Hingeless in-plane rotor blade design
US4046489A (en) * 1975-10-08 1977-09-06 Eagle Motive Industries, Inc. Aerodynamic fan blade
US4130380A (en) * 1976-05-13 1978-12-19 Kaiser Heinz W Wind powered turbine and airfoil construction
US4278401A (en) * 1977-12-05 1981-07-14 Fiat Societa Per Azioni Blade for wind motors
US4305699A (en) * 1979-02-15 1981-12-15 Centro Ricerche Fiat S.P.A. Blade for a wind motor
US4366387A (en) * 1979-05-10 1982-12-28 Carter Wind Power Wind-driven generator apparatus and method of making blade supports _therefor
DE3138312A1 (de) * 1980-10-02 1982-06-16 United Technologies Corp., 06101 Hartford, Conn. "verfahren zur herstellung von faserverstaerkten gegenstaenden"
US4648921A (en) * 1980-10-02 1987-03-10 United Technologies Corporation Method of making fiber reinforced articles
US4524499A (en) * 1981-11-16 1985-06-25 Trw Inc. Method of fabricating an aircraft propeller assembly with composite blades
US4639284A (en) * 1983-03-18 1987-01-27 Societe Nationale Industrielle Aerospatiale Process for manufacturing a variable pitch multi-blade propeller by molding resin-impregnated fails around a preform
US4852805A (en) * 1983-12-30 1989-08-01 The Boeing Company Hybrid thrust reverser cascade basket and method
US4722821A (en) * 1983-12-30 1988-02-02 The Boeing Company Method of making a cascade basket for a thrust reverser
US4674951A (en) * 1984-09-06 1987-06-23 Societe Nationale D'Etude et de Construction de Meteur D'Aviation (S.N.E.C.M.A.) Ring structure and compressor blow-off arrangement comprising said ring
EP0219889A3 (en) * 1985-10-23 1989-05-24 The Boeing Company Hybrid thrust reverser cascade basket and method
EP0219889A2 (en) * 1985-10-23 1987-04-29 The Boeing Company Hybrid thrust reverser cascade basket and method of producing
US4797066A (en) * 1986-01-28 1989-01-10 Stroemberg Karl Otto Turbine wheel having hub-mounted elastically deformable blade made of reinforced polymeric composite material
US4789304A (en) * 1987-09-03 1988-12-06 United Technologies Corporation Insulated propeller blade
WO1992002410A1 (en) * 1990-07-27 1992-02-20 The Marley Cooling Tower Company Plastic fan blade for industrial cooling towers and method of making same
WO1992002731A1 (en) * 1990-07-27 1992-02-20 The Marley Cooling Tower Company Fan blade having abrasion resistant leading edge
US5096384A (en) * 1990-07-27 1992-03-17 The Marley Cooling Tower Company Plastic fan blade for industrial cooling towers and method of making same
US5123814A (en) * 1990-07-27 1992-06-23 The Marley Cooling Tower Company Industrial cooling tower fan blade having abrasion resistant leading edge
US5127802A (en) * 1990-12-24 1992-07-07 United Technologies Corporation Reinforced full-spar composite rotor blade
US5269658A (en) * 1990-12-24 1993-12-14 United Technologies Corporation Composite blade with partial length spar
US5564901A (en) * 1993-12-14 1996-10-15 The Moore Company Low noise fan
US5683636A (en) * 1995-07-19 1997-11-04 Ventilatoren Sirocco Howden B.V. Method of fan blade manufacture
US6155784A (en) * 1997-01-09 2000-12-05 Cartercopters, Llc. Variable pitch aircraft propeller
EP1035330A2 (en) * 1999-03-08 2000-09-13 Matsushita Electric Industrial Co., Ltd. Impeller for blower, its manufacturing method, and blower
EP1035330A3 (en) * 1999-03-08 2002-05-08 Matsushita Electric Industrial Co., Ltd. Impeller for blower, its manufacturing method, and blower
CN1116522C (zh) * 1999-03-08 2003-07-30 松下电器产业株式会社 鼓风机用叶轮及其制造方法和鼓风机
US6598650B1 (en) * 2000-06-14 2003-07-29 Newell Window Furnishings, Inc. Hollow, rigid vanes for door and window coverings
WO2010115637A1 (de) * 2009-04-11 2010-10-14 W & S Management Gmbh & Co. Kg Verstärkungselement zur verwendung mit einer ventilatornabe
US20120063906A1 (en) * 2009-05-20 2012-03-15 Henrik Witt Fan Blade
US9869325B2 (en) * 2009-05-20 2018-01-16 W & S Management Gmbh & Co. Kg Fan blade
AU2015202728B2 (en) * 2009-05-20 2017-03-30 W & S Management Gmbh & Co. Kg Fan blade
US20110150661A1 (en) * 2009-12-18 2011-06-23 Magna International Inc. Sheet molding compound with cores
US8992813B2 (en) * 2009-12-18 2015-03-31 Magna International Inc. Sheet molding compound with cores
CN105121862A (zh) * 2013-02-13 2015-12-02 株式会社Ihi 风扇叶片的制造方法和制造装置
CN105121862B (zh) * 2013-02-13 2017-03-15 株式会社Ihi 风扇叶片的制造方法和制造装置
US9835112B2 (en) * 2014-02-10 2017-12-05 MRA Systems Inc. Thrust reverser cascade
US20150226157A1 (en) * 2014-02-10 2015-08-13 Mra Systems, Inc. Thrust reverser cascade
US9945389B2 (en) 2014-05-05 2018-04-17 Horton, Inc. Composite fan
US10415587B2 (en) 2014-05-05 2019-09-17 Horton, Inc. Composite fan and method of manufacture
US10914314B2 (en) 2014-05-05 2021-02-09 Horton, Inc. Modular fan assembly
US20160215756A1 (en) * 2014-05-06 2016-07-28 Shenzhen Bangzhong Wind Power Generation Technology Co., Ltd. Wind turbine generator compatible with high and low wind speeds
EP3009684A1 (fr) 2014-09-11 2016-04-20 GEA Batignolles Technologies Thermiques Ventilateur pour aéroréfrigérant
FR3025748A1 (fr) * 2014-09-11 2016-03-18 Gea Batignolles Technologies Thermiques Ventilateur pour aerorefrigerant.
CN105485051A (zh) * 2015-09-29 2016-04-13 常州倍安特动力机械有限公司 一种发电装置冷却用风扇
US20190211841A1 (en) * 2018-01-05 2019-07-11 Aurora Flight Sciences Corporation Composite Fan Blades with Integral Attachment Mechanism
US11644046B2 (en) * 2018-01-05 2023-05-09 Aurora Flight Sciences Corporation Composite fan blades with integral attachment mechanism

Also Published As

Publication number Publication date
CA923473A (en) 1973-03-27
ZA711112B (en) 1971-11-24
JPS548883B1 (es) 1979-04-19
ES195104Y (es) 1975-06-01
ES195104U (es) 1975-01-16
DE2113019A1 (de) 1971-10-14
DE2113019B2 (de) 1974-03-07
GB1330565A (en) 1973-09-19
DE2113019C3 (de) 1975-10-02

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