US3737250A - Fiber blade attachment - Google Patents
Fiber blade attachment Download PDFInfo
- Publication number
- US3737250A US3737250A US00153720A US3737250DA US3737250A US 3737250 A US3737250 A US 3737250A US 00153720 A US00153720 A US 00153720A US 3737250D A US3737250D A US 3737250DA US 3737250 A US3737250 A US 3737250A
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- United States
- Prior art keywords
- blade
- cavity
- fiber
- root
- fitting
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
- F01D5/282—Selecting composite materials, e.g. blades with reinforcing filaments
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- the present invention relates to turbine apparatus, and more particularly, to replaceable turbine blades constructed of fiber composite material.
- the fibers of each blade are retained in a dovetailed fitting shaped to conform to a corresponding broached slot formed in the periphery of a blade carrying disc, such that the individual blades together with the root fittings are replaceable.
- the root ends of the fibers are attached to a fitting which in turn attaches to the disc and the root attachment of the fibers becomes the limiting consideration of fiber composite blades.
- the centrifugal load transferred through the fibers is collected at the root fitting by various squeezing and wedging combinations such that the load is carried from the fibers to the fitting in shear. It is one of the well-known properties of fiber composites that they usually exhibit relatively low shear stress allowables as compared to their particular tensile stress allowables, thus the prior art techniques of blade root attachment result in critical limitations on blade manufacture and maximum blade rotational speed.
- mounting pins extending across a cavity formed in a blade root fitting around which fibers are looped extending outwardly therefrom along the span of the blade.
- the blade root fitting is generally shaped on the exterior surfaces thereof to conform with the convolutions of a corresponding broached slot fabricated in the periphery of a blade disc and when in position the lateral motion of the pins is restrained by the slot.
- the spanwise fibers are looped in bundles around the respective pins, positioned laterally along the pin in conformance with the profile of the blade, thus within the limits of the root fitting cavity various blade profiles can be accommodated.
- the respective fibers arranged according to the profile of the blade are then potted in place by appropriate potting compound and the blade is formed by surrounding the fibers with the composite material.
- a crossply woven fiber cloth covers the exterior of the blade to further strengthen the blade and to prevent fiber separation or fraying.
- FIG. 1 shows in plan view a compressor disc assembly having blades constructed according to the invention mounted on the periphery thereof;
- FIG. 2 is a fragmentary view shown in partial cross section along line 22 of FIG. 1 of one blade constructed according to the present invention
- FIG. 3 is a cross section view of the blade drawn along lines 33 of FIG. 2;
- FIG. 4 is a cross section view taken along line 4-4 of FIG. 2 of a blade root fitting constructed according to the present invention.
- the present invention provides a technique of root attachment of fiber composite blades specifically directed at the transmission of tensile stress from the composite structure to the attachment fixture. It is particularly useful in applications where the tensile properties of fiber composite structures are found advantageous, such as, attachment of composite helicopter rotor blades or,as shown specifically in this embodiment, attachment of compressor blades in turbine machinery.
- a compressor disc assembly 10 comprising a plurality of replaceable blades 11 each blade terminating in a dovetailed root fitting 13.
- Each root fitting 13 is shown inserted into respective broached slots 14 formed across a peripheral flange of a disc 12.
- Each blade 11 extends radially away from the disc 12 and during rotation of assembly 10 is pulled outwardly by the centrifugal force. Accordingly the major component force is in tension transmitted through fitting 13 to the convolutions of slot 14 to the peripheral flange of disc 12.
- blade 11 is formed of a composite material comprising fiber elements 20, such as glass fibers impregnated in a suitable thermosetting resin, extending generally along a spanwise direction of the blade.
- the root end of the blade extends into a cavity 21 formed in fitting 13 wherein fitting 13 is generally similar in shape to a flowerbox or a bathtub.
- a plurality of pins 25 extend through corresponding openings 26 across and between the lateral sides of the root fitting 13 extending across the cavity 21 proximate the bottom surface thereof, in a plane generally orthogonal to the longitudinal axis of blade 11.
- Fiber elements 20, separated into bundles, are looped around the respective pins 25 extending radially outward therefrom generally along the platform of the blade 11.
- a corresponding number of ribs 28 are shown adjacent and parallel to the pins 25 extending between the lateral sides of fitting l3 inside cavity 21 proximate the upper opening thereof. Ribs 28 areprovided for the purpose of separating the fiber bundles thereby facili rating the assembly thereof and the installation of pins 25.
- an appropriate composite material 45 such as potting compound or resin, generally formed or cast to conform to the dimensions of the blade.
- the exterior of blade 11 thus formed is then wrapped with one or more layers of crossply fiber cloth 30 which strengthens the blade laterally to reduce possibility of fraying.
- Cavity 21 is also filled with a composite material 45 such as resin or potting compound providing a relatively rigid attachment of the fiber elements 20 to fitting l3 and securing the root edge of cloth 30.
- the fiber elements 20 are looped in bundles over the open sections of pins 25 generally filling the thickness of the blade 11, the individual bundles of fiber elements 20 being displaceable along pins 25, within cavity 21, such that they generally can be arranged to conform to any root profile section of blade 11.
- This particular feature allows for convenient assembly of various blade profiles which is particularly significant during the development stages of assembly for any specific application.
- the individual bundles are affixed in their respective location by the potting compound allowing for the positioning of the fiber elements in the best location for efficient tensile load transfer within the cross section of blade 11.
- the invention provides a convenient attachment configuration for a composite blade which is typically critical in tensile load transfer at the root end thereof.
- the invention also provides convenient freedom of fiber deployment such that many blade profiles can be easily accommodated within the limits of a standardized root fitting. This the invention accomplishes without any trade-off in reduced structural simplicity and convenience in blade replacement.
- a fibercomposite blade for a rotor disc having slots of dovetail shape comprising:
- a fiber composite blade according to claim 1 further comprising:
- a fiber composite blade according to claim 2 further comprising:
- a fiber composite blade according to claim 3 further comprising:
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A fiber composite compressor blade having spanwise fiber elements cast within an appropriate composite material wherein at the root end of the blade the fiber elements are looped over transverse pins extending across a hollow root fitting. The root fitting is generally formed to dovetail into peripheral slots extending across a compressor disc. The exterior of each blade is enclosed by layers of crossply fiber cloth and the cavity within the root fitting is filled with an appropriate potting compound to respectively provide strength and rigidity to the blade.
Description
United States Patent Pllpel et al. 1 June 5, 1973 54] FIBER BLADE ATTACHMENT 2,919,889 1/1960 Rube] ..416/230 x 2,929,755 3/1960 Porter ..416/230 x [75] Inventors. Walter Pilpel, West Hartford;
Spencer Tore, New Britain; 3,487,879 1/1970 McCarthy et a1. ..416/220 ux g p Manchester, all FOREIGN PATENTS 0R APPLICATIONS 0 01111.
787,500 12/1957 Great Britain ..416/230 The United States of America as represented by the Secretary of the Navy, Washington, D.C.
Filed: June 16, 1971 Appl. No.: 153,720
Assignee:
US. Cl. ..4l6/219, 416/230, 416/241, 416/248 Int. Cl ..F0ld 5/30 Field of Search ..416/220, 230, 249, 416/248, 215, 219, 241 A References Cited UNITED STATES PATENTS 11/1958 Warnken ..416/230 X 1/1959 Hampshire et a1. ..4l6/230 Primary Examiner-Everette A. Powell, Jr. Attorney- R. S. Sciascia and Henry Hansen A fiber composite compressor blade having spanwise fiber elements cast within an appropriate composite material wherein at the root end of the blade the fiber elements are looped over transverse pins extending across a hollow root fitting. The root fitting is generally formed to dovetail into peripheral slots extending across a compressor disc. The exterior of each blade is enclosed by layers of crossply fiber cloth and the cavity within the root fitting is filled with an appropriate potting compound to respectively provide strength and rigidity to the blade.
ABSTRACT 4 Claims, 4 Drawing Figures 17/] saw/1,1,
FIBER BLADE ATTACHMENT STATEMENT OF GOVERNMENT INTEREST The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
BACKGROUND OF THE INVENTION The present invention relates to turbine apparatus, and more particularly, to replaceable turbine blades constructed of fiber composite material.
In the field of turbine powerplants and particularly in turbine powerplants adapted to aircraft use, one of the most critical design items is the turbine blade. Considerations of powerplant cycle efficiency and weight usually require high blade tip speeds with resulting high centrifugal forces tending to separate the blade away from the retaining fixture or blade carrying disc. Accordingly there is a constant search in this art to obtain blade structures which are relatively strong in tension as compared to their weight or cross section. Generally one technique of constructing high strength blades of an axial turbine or compressor is to construct the blades using fiber composite materials. In order to utilize to best advantage the characteristically high tensile properties of the fibers the fibers are laid spanwise along the blade. In this manner high rotational blade speeds can be attained with a relatively low blade mass and cross section. At the root end the fibers of each blade are retained in a dovetailed fitting shaped to conform to a corresponding broached slot formed in the periphery of a blade carrying disc, such that the individual blades together with the root fittings are replaceable. Thus the root ends of the fibers are attached to a fitting which in turn attaches to the disc and the root attachment of the fibers becomes the limiting consideration of fiber composite blades. Typically in the prior art the centrifugal load transferred through the fibers is collected at the root fitting by various squeezing and wedging combinations such that the load is carried from the fibers to the fitting in shear. It is one of the well-known properties of fiber composites that they usually exhibit relatively low shear stress allowables as compared to their particular tensile stress allowables, thus the prior art techniques of blade root attachment result in critical limitations on blade manufacture and maximum blade rotational speed.
SUMMARY OF THE INVENTION Accordingly it is the general purpose and object of the present invention to provide a root attachment technique for attaching fiber composite blades wherein the tensile properties of the fibers are used to best advantage. Other objects of the invention are to provide a blade root attachment means which will conveniently accommodate various blade profiles, as well as blade root attachment means which are easily assembled.
These and other objects are accomplished according to the present invention by providing mounting pins extending across a cavity formed in a blade root fitting around which fibers are looped extending outwardly therefrom along the span of the blade. The blade root fitting is generally shaped on the exterior surfaces thereof to conform with the convolutions of a corresponding broached slot fabricated in the periphery of a blade disc and when in position the lateral motion of the pins is restrained by the slot. The spanwise fibers are looped in bundles around the respective pins, positioned laterally along the pin in conformance with the profile of the blade, thus within the limits of the root fitting cavity various blade profiles can be accommodated. The respective fibers arranged according to the profile of the blade are then potted in place by appropriate potting compound and the blade is formed by surrounding the fibers with the composite material. A crossply woven fiber cloth covers the exterior of the blade to further strengthen the blade and to prevent fiber separation or fraying.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1. shows in plan view a compressor disc assembly having blades constructed according to the invention mounted on the periphery thereof;
FIG. 2 is a fragmentary view shown in partial cross section along line 22 of FIG. 1 of one blade constructed according to the present invention;
FIG. 3 is a cross section view of the blade drawn along lines 33 of FIG. 2; and
FIG. 4 is a cross section view taken along line 4-4 of FIG. 2 of a blade root fitting constructed according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention provides a technique of root attachment of fiber composite blades specifically directed at the transmission of tensile stress from the composite structure to the attachment fixture. It is particularly useful in applications where the tensile properties of fiber composite structures are found advantageous, such as, attachment of composite helicopter rotor blades or,as shown specifically in this embodiment, attachment of compressor blades in turbine machinery.
Referring to FIG. 1 a compressor disc assembly 10 is shown comprising a plurality of replaceable blades 11 each blade terminating in a dovetailed root fitting 13. Each root fitting 13 is shown inserted into respective broached slots 14 formed across a peripheral flange of a disc 12. Each blade 11 extends radially away from the disc 12 and during rotation of assembly 10 is pulled outwardly by the centrifugal force. Accordingly the major component force is in tension transmitted through fitting 13 to the convolutions of slot 14 to the peripheral flange of disc 12. I
As shown in more detail in FIG. 2 blade 11 is formed of a composite material comprising fiber elements 20, such as glass fibers impregnated in a suitable thermosetting resin, extending generally along a spanwise direction of the blade. The root end of the blade extends into a cavity 21 formed in fitting 13 wherein fitting 13 is generally similar in shape to a flowerbox or a bathtub. A plurality of pins 25 extend through corresponding openings 26 across and between the lateral sides of the root fitting 13 extending across the cavity 21 proximate the bottom surface thereof, in a plane generally orthogonal to the longitudinal axis of blade 11. Fiber elements 20, separated into bundles, are looped around the respective pins 25 extending radially outward therefrom generally along the platform of the blade 11. A corresponding number of ribs 28 are shown adjacent and parallel to the pins 25 extending between the lateral sides of fitting l3 inside cavity 21 proximate the upper opening thereof. Ribs 28 areprovided for the purpose of separating the fiber bundles thereby facili rating the assembly thereof and the installation of pins 25. Once disposed in their respective positions fibers 20 are surrounded by an appropriate composite material 45, such as potting compound or resin, generally formed or cast to conform to the dimensions of the blade. The exterior of blade 11 thus formed is then wrapped with one or more layers of crossply fiber cloth 30 which strengthens the blade laterally to reduce possibility of fraying. Cavity 21 is also filled with a composite material 45 such as resin or potting compound providing a relatively rigid attachment of the fiber elements 20 to fitting l3 and securing the root edge of cloth 30.
Referring to FIGS. 3 and 4 the fiber elements 20 are looped in bundles over the open sections of pins 25 generally filling the thickness of the blade 11, the individual bundles of fiber elements 20 being displaceable along pins 25, within cavity 21, such that they generally can be arranged to conform to any root profile section of blade 11. This particular feature allows for convenient assembly of various blade profiles which is particularly significant during the development stages of assembly for any specific application. The individual bundles are affixed in their respective location by the potting compound allowing for the positioning of the fiber elements in the best location for efficient tensile load transfer within the cross section of blade 11.
Some of the many advantages of the present invention should now be readily apparent. The invention provides a convenient attachment configuration for a composite blade which is typically critical in tensile load transfer at the root end thereof. The invention also provides convenient freedom of fiber deployment such that many blade profiles can be easily accommodated within the limits of a standardized root fitting. This the invention accomplishes without any trade-off in reduced structural simplicity and convenience in blade replacement.
Obviously many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.
What is claimed is:
1. A fibercomposite blade for a rotor disc having slots of dovetail shape, comprising:
a root fitting having cross sections of outer dovetail shape uniform between the ends of said fitting and corresponding to the shape of the disc slots for contiguous and slidable insertion therein, the cross sections being transverse to the direction of insertion, a radially outwardly communicating cavity, and pin attachment means extending across said cavity transverse to the direction of root fitting insertion fiber elements looped around said pin attachment means the free ends thereof extending outwardly from said cavity; and a composite material interstitially surrounding said fiber elements, filling said cavity, and formed into a blade configuraton radially extending from said cavity. 2. A fiber composite blade according to claim 1, further comprising:
said root fitting including a plurality of pairs of coaxial openings on opposite sides of the cavity, the axes of said openings being normal to the direction of insertion; said pin attachment means including pins inserted at either end into said openings; said fiber elements being grouped in bundles, each being looped around respective ones of said pins within said cavity. 3. A fiber composite blade according to claim 2, further comprising:
said root fitting including transverse ribs extending across the opening of said cavity adjacent and parallel to said pins. 4. A fiber composite blade according to claim 3, further comprising:
one or more layers of fiber cloth enclosing said composite material, contiguously attached to the exterior surfaces thereof.
Claims (4)
1. A fiber composite blade for a rotor disc having slots of dovetail shape, comprising: a root fitting having cross sections of outer dovetail shape uniform between the ends of said fitting and corresponding to the shape of the disc slots for contiguous and slidable insertion therein, the cross sections being transverse to the direction of insertion, a radially outwardly communicating cavity, and pin attachment means extending across said cavity transverse to the direction of root fitting insertion fiber elements looped around said pin attachment means the free ends thereof extending outwardly from said cavity; and a composite material interstitially surrounding said fiber elements, filling said cavity, and formed into a blade configuraton radially extending from said cavity.
2. A fiber composite blade according to claim 1, further comprising: said root fitting including a plurality of pairs of coaxial openings on opposite sides of the cavity, the axes of said openings being normal to the direction of insertion; said pin attachment means including pins inserted at either end into said openings; said fiber elements being grouped in bundles, each being looped around respective ones of said pins within said cavity.
3. A fiber composite blade according to claim 2, further comprising: said root fitting including transverse ribs extending across the opening of said cavity adjacent and parallel to said pins.
4. A fiber composite blade according to claim 3, further comprising: one or more layers of fiber cloth enclosing said composite material, contiguously attached to the exterior surfaces thereof.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US15372071A | 1971-06-16 | 1971-06-16 |
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US3737250A true US3737250A (en) | 1973-06-05 |
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US00153720A Expired - Lifetime US3737250A (en) | 1971-06-16 | 1971-06-16 | Fiber blade attachment |
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Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3834832A (en) * | 1971-12-21 | 1974-09-10 | Rolls Royce 1971 Ltd | Fibre reinforced composite structures |
JPS5267405A (en) * | 1975-12-03 | 1977-06-03 | Mitsubishi Heavy Ind Ltd | Revoluting body |
US4031601A (en) * | 1975-02-11 | 1977-06-28 | Dayton Scale Model Company | Method of fabricating and mounting a fiberglass fan blade |
US4037990A (en) * | 1976-06-01 | 1977-07-26 | General Electric Company | Composite turbomachinery rotor |
US4111606A (en) * | 1976-12-27 | 1978-09-05 | United Technologies Corporation | Composite rotor blade |
US4232996A (en) * | 1978-10-06 | 1980-11-11 | The United States Of America As Represented By The Secretary Of The Air Force | Light weight fan assembly |
US4354804A (en) * | 1979-11-30 | 1982-10-19 | Williams Research Corporation | Composite turbine wheel, method of manufacture and fixture therefor |
US4643647A (en) * | 1984-12-08 | 1987-02-17 | Rolls-Royce Plc | Rotor aerofoil blade containment |
EP0284778A2 (en) * | 1987-03-28 | 1988-10-05 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Fan blade, particularly for prop-fan engines |
GB2208125A (en) * | 1987-06-04 | 1989-03-01 | Mtu Muenchen Gmbh | Compressor blade and mounting arrangement |
FR2626617A1 (en) * | 1988-01-30 | 1989-08-04 | Mtu Muenchen Gmbh | MOBILE AUB FOR A ROTOR OF A MOTOR-PROPELLER GROUP, IN PARTICULAR FOR COMMERCIAL AIRCRAFT |
EP0353672A2 (en) * | 1988-08-03 | 1990-02-07 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Composite propeller blades |
US5013216A (en) * | 1988-09-09 | 1991-05-07 | Airfoil Textron Inc. | Composite blade perform with divergent root |
US5018271A (en) * | 1988-09-09 | 1991-05-28 | Airfoil Textron Inc. | Method of making a composite blade with divergent root |
US5049036A (en) * | 1988-09-09 | 1991-09-17 | Airfoil Textron Inc | Composite blade with divergent root and method for making same |
EP0496550A1 (en) * | 1991-01-25 | 1992-07-29 | General Electric Company | Wide chord fan blade |
FR2685732A1 (en) * | 1991-12-31 | 1993-07-02 | Snecma | TURBOMACHINE DAWN IN COMPOSITE MATERIAL. |
DE4203205A1 (en) * | 1992-02-05 | 1993-08-12 | Muehlbauer Luftfahrttechn Gmbh | Location for propeller blade made of fibre cpd. - has loop rail with bearing shaft extending through propeller blade root with loop rail extending around bearing shaft |
US5240377A (en) * | 1992-02-25 | 1993-08-31 | Williams International Corporation | Composite fan blade |
US5340280A (en) * | 1991-09-30 | 1994-08-23 | General Electric Company | Dovetail attachment for composite blade and method for making |
US5464325A (en) * | 1993-06-25 | 1995-11-07 | Institut Fuer Luft- Und Kaeltetechnik Gemeinnuetzige Gesellschaft Mbh | Turbo-compressor impeller for coolant |
WO1997036108A1 (en) * | 1996-03-27 | 1997-10-02 | The Scott Fetzer Company | Flexible impeller with one-piece hub |
CN100343489C (en) * | 2002-12-11 | 2007-10-17 | 通用电气公司 | Method and device for assembling turbine engine |
US20100014982A1 (en) * | 2005-11-21 | 2010-01-21 | Detlef Haje | Turbine Blade for a Steam Turbine |
US7972113B1 (en) | 2007-05-02 | 2011-07-05 | Florida Turbine Technologies, Inc. | Integral turbine blade and platform |
US20120051924A1 (en) * | 2010-08-31 | 2012-03-01 | General Electric Company | Turbine Blade Assembly |
JP2013510994A (en) * | 2009-11-17 | 2013-03-28 | シーメンス アクティエンゲゼルシャフト | Turbine blade or compressor blade |
GB2498077A (en) * | 2011-12-23 | 2013-07-03 | Ratier Figeac Soc | Propeller blade with redundant anchoring in a hub |
US20130309435A1 (en) * | 2012-05-15 | 2013-11-21 | Hexcel Corporation | Over-molding of load-bearing composite structures |
US9777579B2 (en) | 2012-12-10 | 2017-10-03 | General Electric Company | Attachment of composite article |
US9797257B2 (en) | 2012-12-10 | 2017-10-24 | General Electric Company | Attachment of composite article |
RU2638234C2 (en) * | 2012-04-24 | 2017-12-12 | Дженерал Электрик Компани | Turbomachine (versions) and gas turbine engine |
FR3122696A1 (en) * | 2021-05-06 | 2022-11-11 | Safran Aircraft Engines | Composite turbomachine blade fitted with a prestressing device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB787500A (en) * | 1955-05-12 | 1957-12-11 | Rolls Royce | Improvements relating to axial flow compressor blading and methods of manufacture thereof |
US2859936A (en) * | 1954-03-03 | 1958-11-11 | Cincinnati Testing & Res Lab | Compressor blade and method of forming same |
US2868439A (en) * | 1954-05-07 | 1959-01-13 | Goodyear Aircraft Corp | Plastic axial-flow compressor for gas turbines |
US2919889A (en) * | 1955-03-03 | 1960-01-05 | United Aircraft Corp | Blade mounting |
US2929755A (en) * | 1958-07-24 | 1960-03-22 | Orenda Engines Ltd | Plastic blades for gas turbine engines |
US3487879A (en) * | 1967-08-02 | 1970-01-06 | Dowty Rotol Ltd | Blades,suitable for propellers,compressors,fans and the like |
-
1971
- 1971-06-16 US US00153720A patent/US3737250A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2859936A (en) * | 1954-03-03 | 1958-11-11 | Cincinnati Testing & Res Lab | Compressor blade and method of forming same |
US2868439A (en) * | 1954-05-07 | 1959-01-13 | Goodyear Aircraft Corp | Plastic axial-flow compressor for gas turbines |
US2919889A (en) * | 1955-03-03 | 1960-01-05 | United Aircraft Corp | Blade mounting |
GB787500A (en) * | 1955-05-12 | 1957-12-11 | Rolls Royce | Improvements relating to axial flow compressor blading and methods of manufacture thereof |
US2929755A (en) * | 1958-07-24 | 1960-03-22 | Orenda Engines Ltd | Plastic blades for gas turbine engines |
US3487879A (en) * | 1967-08-02 | 1970-01-06 | Dowty Rotol Ltd | Blades,suitable for propellers,compressors,fans and the like |
Cited By (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3834832A (en) * | 1971-12-21 | 1974-09-10 | Rolls Royce 1971 Ltd | Fibre reinforced composite structures |
US4031601A (en) * | 1975-02-11 | 1977-06-28 | Dayton Scale Model Company | Method of fabricating and mounting a fiberglass fan blade |
JPS5267405A (en) * | 1975-12-03 | 1977-06-03 | Mitsubishi Heavy Ind Ltd | Revoluting body |
US4037990A (en) * | 1976-06-01 | 1977-07-26 | General Electric Company | Composite turbomachinery rotor |
US4111606A (en) * | 1976-12-27 | 1978-09-05 | United Technologies Corporation | Composite rotor blade |
US4232996A (en) * | 1978-10-06 | 1980-11-11 | The United States Of America As Represented By The Secretary Of The Air Force | Light weight fan assembly |
US4354804A (en) * | 1979-11-30 | 1982-10-19 | Williams Research Corporation | Composite turbine wheel, method of manufacture and fixture therefor |
US4643647A (en) * | 1984-12-08 | 1987-02-17 | Rolls-Royce Plc | Rotor aerofoil blade containment |
EP0284778A3 (en) * | 1987-03-28 | 1989-03-15 | Mtu Muenchen Gmbh | Fan blade, particularly for prop-fan engines |
EP0284778A2 (en) * | 1987-03-28 | 1988-10-05 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Fan blade, particularly for prop-fan engines |
GB2208125B (en) * | 1987-06-04 | 1992-02-19 | Mtu Muenchen Gmbh | Mounting a fibre-technology formed rotor blade. |
US4877376A (en) * | 1987-06-04 | 1989-10-31 | Motoren-Und Turbinen-Union Munchen Gmbh | Attachment of a rotor blade of fiber reinforced plastic to a metal rotor hub |
GB2208125A (en) * | 1987-06-04 | 1989-03-01 | Mtu Muenchen Gmbh | Compressor blade and mounting arrangement |
FR2626617A1 (en) * | 1988-01-30 | 1989-08-04 | Mtu Muenchen Gmbh | MOBILE AUB FOR A ROTOR OF A MOTOR-PROPELLER GROUP, IN PARTICULAR FOR COMMERCIAL AIRCRAFT |
US4929154A (en) * | 1988-01-30 | 1990-05-29 | Mtu Motoren-Und Turbinen-Union Munchen | Blade arrangement for a propulsion rotor |
EP0353672A2 (en) * | 1988-08-03 | 1990-02-07 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Composite propeller blades |
EP0353672A3 (en) * | 1988-08-03 | 1990-09-19 | Mtu Muenchen Gmbh | Composite propeller blades |
US4966527A (en) * | 1988-08-03 | 1990-10-30 | Mtu Motoren-Und Turbinen-Union Muenchen Gmbh | Composite blade construction for a propeller or rotor blade |
US5013216A (en) * | 1988-09-09 | 1991-05-07 | Airfoil Textron Inc. | Composite blade perform with divergent root |
US5018271A (en) * | 1988-09-09 | 1991-05-28 | Airfoil Textron Inc. | Method of making a composite blade with divergent root |
US5049036A (en) * | 1988-09-09 | 1991-09-17 | Airfoil Textron Inc | Composite blade with divergent root and method for making same |
EP0496550A1 (en) * | 1991-01-25 | 1992-07-29 | General Electric Company | Wide chord fan blade |
US5340280A (en) * | 1991-09-30 | 1994-08-23 | General Electric Company | Dovetail attachment for composite blade and method for making |
US5292231A (en) * | 1991-12-31 | 1994-03-08 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation "S.N.E.C.M.A." | Turbomachine blade made of composite material |
FR2685732A1 (en) * | 1991-12-31 | 1993-07-02 | Snecma | TURBOMACHINE DAWN IN COMPOSITE MATERIAL. |
DE4203205A1 (en) * | 1992-02-05 | 1993-08-12 | Muehlbauer Luftfahrttechn Gmbh | Location for propeller blade made of fibre cpd. - has loop rail with bearing shaft extending through propeller blade root with loop rail extending around bearing shaft |
US5240377A (en) * | 1992-02-25 | 1993-08-31 | Williams International Corporation | Composite fan blade |
WO1993016914A1 (en) * | 1992-02-25 | 1993-09-02 | Williams International Corporation | Composite fan blade |
US5464325A (en) * | 1993-06-25 | 1995-11-07 | Institut Fuer Luft- Und Kaeltetechnik Gemeinnuetzige Gesellschaft Mbh | Turbo-compressor impeller for coolant |
WO1997036108A1 (en) * | 1996-03-27 | 1997-10-02 | The Scott Fetzer Company | Flexible impeller with one-piece hub |
CN100343489C (en) * | 2002-12-11 | 2007-10-17 | 通用电气公司 | Method and device for assembling turbine engine |
US20100014982A1 (en) * | 2005-11-21 | 2010-01-21 | Detlef Haje | Turbine Blade for a Steam Turbine |
US7972113B1 (en) | 2007-05-02 | 2011-07-05 | Florida Turbine Technologies, Inc. | Integral turbine blade and platform |
JP2013510994A (en) * | 2009-11-17 | 2013-03-28 | シーメンス アクティエンゲゼルシャフト | Turbine blade or compressor blade |
US20120051924A1 (en) * | 2010-08-31 | 2012-03-01 | General Electric Company | Turbine Blade Assembly |
GB2498077A (en) * | 2011-12-23 | 2013-07-03 | Ratier Figeac Soc | Propeller blade with redundant anchoring in a hub |
GB2498077B (en) * | 2011-12-23 | 2018-02-14 | Ratier Figeac Soc | Blade with redundant anchoring in a hub, propeller, turboprop engine and aircraft |
RU2638234C2 (en) * | 2012-04-24 | 2017-12-12 | Дженерал Электрик Компани | Turbomachine (versions) and gas turbine engine |
US20130309435A1 (en) * | 2012-05-15 | 2013-11-21 | Hexcel Corporation | Over-molding of load-bearing composite structures |
US9393745B2 (en) * | 2012-05-15 | 2016-07-19 | Hexcel Corporation | Over-molding of load-bearing composite structures |
US9777579B2 (en) | 2012-12-10 | 2017-10-03 | General Electric Company | Attachment of composite article |
US9797257B2 (en) | 2012-12-10 | 2017-10-24 | General Electric Company | Attachment of composite article |
FR3122696A1 (en) * | 2021-05-06 | 2022-11-11 | Safran Aircraft Engines | Composite turbomachine blade fitted with a prestressing device |
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