US20100189562A1 - Composite material turbomachine blade with a reinforced root - Google Patents
Composite material turbomachine blade with a reinforced root Download PDFInfo
- Publication number
- US20100189562A1 US20100189562A1 US12/685,182 US68518210A US2010189562A1 US 20100189562 A1 US20100189562 A1 US 20100189562A1 US 68518210 A US68518210 A US 68518210A US 2010189562 A1 US2010189562 A1 US 2010189562A1
- Authority
- US
- United States
- Prior art keywords
- blade
- root
- metal plates
- side flanks
- composite material
- 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.)
- Abandoned
Links
Images
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
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
-
- 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
-
- 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
- F01D5/3092—Protective layers between blade root and rotor disc surfaces, e.g. anti-friction layers
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/50—Intrinsic material properties or characteristics
- F05D2300/506—Hardness
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
- F05D2300/603—Composites; e.g. fibre-reinforced
-
- 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
Abstract
The invention relates to a turbomachine blade made of composite material including fiber reinforcement, the blade being obtained by three-dimensionally weaving yarns and densifying with a matrix. The blade comprises a single piece constituting both the airfoil and the root of the blade. The blade root has two substantially plane opposite side flanks that are formed in register with the pressure side and suction side surfaces respectively of the airfoil and it is clamped between two metal plates that are fastened against the side flanks of the root.
Description
- The present invention relates to the general field of composite material turbomachine blades comprising fiber reinforcement densified by a matrix.
- The intended field is that of gas turbine blades for aeroengines or for industrial turbines.
- Proposals have already been made to make turbomachine blades out of composite material. By way of example, reference may be made to patent application FR 08/58090 (not yet published) filed in the joint names of Snecma and Snecma Propulsion Solide, which application describes fabricating a turbomachine blade by making a fiber preform by three-dimensional weaving and by densifying the preform with a matrix.
- Compared with a metal blade obtained in a foundry, a composite material blade presents certain drawbacks associated in particular with mounting it on a metal rotor disk. In particular, a blade obtained by a method as described in document FR 08/58090 generally presents a root of small thickness (less than 5 millimeters (mm) for a low pressure turbine blade). Unfortunately, mounting a blade by engaging its root in an axial slot of a rotor disk requires the blade root to present a certain thickness in order to ensure that the blade is properly held on the disk. Furthermore, the operation of machining the blade root so as to match its profile to the slot in the rotor disk prior to mounting the blade therein is difficult to perform with a blade made of composite material, and runs the risk of damaging the blade. Such an operation necessarily destroys the surface healing layer that is generally deposited on the blade after the preform has been densified. Finally, once mounted on the rotor disk, contact between the metal of the disk and the composite material constituting the blade root gives rise to manifest wear problems due to fretting and due to the differences in thermal expansion between the metal and the composite material.
- A main aim of the present invention is thus to propose a blade of composite material that does not present the above-mentioned drawbacks.
- This object is achieved by means of a turbomachine blade made of composite material, including fiber reinforcement, the blade being obtained by three-dimensionally weaving yarns and densifying with a matrix, and carrying a single piece constituting both the airfoil and the root of the blade, the blade root having two substantially plane opposite side flanks that are formed in register respectively with the pressure side and suction side surfaces of the airfoil, wherein the blade root is clamped between two metal plates that are fastened against the side flanks of the blade root.
- The presence of metal plates clamping the blade root presents numerous advantages. In particular, the plates enable the thickness of the blade root to be increased, thereby making the blade easier to mount on a rotor disk. In addition, the plates are easily machined to match the profile of the blade root to the slots in the rotor disk on which the blade is to be mounted. Finally, the use of such metal plates avoids any metal on composite material contact at the blade root, with all the problems to which that gives rise.
- According to a particular provision of the invention, one of the metal plates has a rim that is received under the blade root.
- At least one of the metal plates may have a hook at an axially downstream end thereof, the hook being designed to receive a retaining ring. Alternatively, at least one of the metal plates may include a notch at an axially downstream end thereof, the notch being designed to co-operate with a tooth of an annular sealing plate.
- The metal plates are fastened against the side flanks of the blade root by welding at least one stud that passes through the plates and the blade root in a direction that is substantially perpendicular to its side flanks.
- Depending on the shape of the slots in the rotor disks receiving the blade, the metal plates may be machined to be dovetail-shaped.
- The invention also provides a turbomachine rotor disk including a plurality of substantially axial metal slots at its outer periphery, wherein the disk further includes a plurality of blades as defined above, each blade having its root mounted in a slot of the disk. The invention provides a turbomachine including at least one such rotor disk.
- Other characteristics and advantages of the present invention appear from the following description made with reference to the accompanying drawings that show embodiments having no limiting character. In the figures:
-
FIG. 1 is a perspective view showing how a turbomachine blade in a first embodiment of the invention is assembled; -
FIG. 2 is a perspective view of theFIG. 1 blade once assembled; -
FIG. 3 is a longitudinal section view of theFIG. 2 blade; -
FIG. 4 is a fragmentary view of a rotor disk provided with blades constituting the first embodiment of the invention; -
FIG. 5 is a fragmentary view of a blade mounted on a disk rotor in a second embodiment of the invention; -
FIG. 6 is a fragmentary view of a blade mounted on a disk rotor in a third embodiment of the invention; and -
FIGS. 7A and 7B are views of blades mounted on a disk rotor in a fourth embodiment of the invention. - The invention is applicable to various types of turbomachine blade made of composite material, in particular compressor and turbine blades for different spools of gas turbines, e.g. a rotor disk blade of a low pressure turbine, as shown in
FIG. 1 . - In known manner, the
blade 10 ofFIGS. 1 to 4 comprises anairfoil 12, aroot 14 formed by a portion of greater thickness and extended by astilt 16, and aplatform 18 situated between thestilt 16 and theairfoil 12. The blade could equally well have a top platform (not shown) in the vicinity of thefree end 20 of the airfoil. - The
airfoil 12 forms an aerodynamic surface that extends in a longitudinal direction from theplatform 18 to itsfree end 20. It presents a curved profile of varying thickness that is shaped to have apressure side surface 12 a and asuction side surface 12 b interconnected by a leadingedge 12 c and atrailing edge 12 d. - The
blade 10 is made of composite material using methods known to the person skilled in the art. By way of example, reference made by made to patent application FR 08/58090 that describes manufacturing such a blade including fiber reinforcement, the blade being obtained by three-dimensionally weaving yarns and densifying with a matrix. With such a method, the portion constituting theairfoil 12 is made integrally with theroot 14 of the blade. - Because of the particular way it is fabricated, the
blade 10 also presents, at itsroot 14, twoopposite side flanks pressure side surface 12 a and thesuction side surface 12 b of theairfoil 12. - According to the invention, the
root 14 of theblade 10 is clamped between twometal plates side flanks - More precisely, the
metal plates side flanks - In the embodiment described herein, the metal plates are fastened by means of at least one through
welded stud 30 extending in a direction that is substantially perpendicular to the side flanks, the plates, and anorifice 32 made for this purpose through theroot 14 of the blade. Theorifice 32 in the blade root is provided during the blade fabrication process, either by using an insert of corresponding shape during weaving, or by drilling through the root after first infiltration. - The metal plates are fastened against the side flanks of the root so as to minimize clearances relative to the root. For this purpose, when using a welded stud, the plates may be put into a press prior to inserting the stud. The stud is then inserted and welded to the metal plates, the welding taking place at a temperature corresponding to the melting temperature of the metal from which the stud is made.
- The pressure exerted on the metal plates prior to inserting the stud is a function in particular of the utilization temperature of the blade. The maximum press force for application on the metal plates is thus the product of the acceptable stress (in newtons per square millimeter (N/mm2)) at the utilization temperature multiplied by the surface area (in square millimeters (mm2)) of the side flanks of the root in contact with the metal plates.
- Making use of a welded stud to assemble the metal plates together is particularly advantageous. The operation of welding the stud at high temperature has the consequence of the heat energy that is given off being transmitted to the surrounding part so that under the effect of the pressure exerted on the metal plates, the expansion clearance between the parts is filled in. Once the welding operation is over, the assembly shrinks as it cools, thereby further increasing the clamping forces of the metal plates against the blade root.
- Naturally, other means for fastening metal plates on the blade root could be used, such as for example fastening by rivet(s) or fastening with the help of at least one screw-and-nut type fastener system.
- Furthermore, bonding between the metal plates and the blade root may be improved by degrading the surface states of the faces of the metal plates that face the side flanks of the root.
- In addition, as shown in
FIGS. 1 to 4 , one of the metal plates (specifically here the plate 26) may include arim 34 that is received under the blade root when the plates are fastened against the side flanks of the root. Therim 34 serves in particular to prevent the metal plates from turning about their clamping axis while the plates are being fastened against the side flanks of the root. - Once the
metal plates root 14 of theblade 10, they are machined so as to match the profile of the root to the slots in a rotor disk onto which the blade is to be mounted. - Thus,
FIG. 4 is a fragmentary radial section through arotor disk 36 having a plurality ofmetal slots 38 in its outer periphery each extending in a direction that is substantially parallel to the axis of rotation of the disk. In each of theseslots 38, there is mounted a machinedroot 14 of ablade 10 of the invention. -
FIG. 5 is a fragmentary view of ablade 10′ in a second embodiment of the invention that is mounted on arotor disk 36′. - Compared with the first embodiment, the
blade 10′ here described presents aroot 14 that is provided withmetal plates 26′, 28′ that are fastened against the side flanks thereof by means of two weldedstuds 30′ (only one being visible inFIG. 5 , the other one being offset transversely from the first), which plates are subsequently machined to have a dovetail shape. Theblade 10′ is also mounted on arotor disk 36′ that is provided at its outer periphery with a plurality ofaxial slots 38′, each having a shape that is complementary to the shape of the machined root of the blade. -
FIG. 6 shows a fragment of ablade 10″ in a third embodiment of the invention that is mounted on arotor disk 36 similar to that described with reference toFIG. 4 . - Compared with the first embodiment, the
blade 10″ here described differs in that at least one of the metal plates fastened to the root 14 (specifically themetal plate 26″ inFIG. 4 ) includes ahook 40 at an axially downstream end thereof, which hook is open towards the inside (i.e. towards the axis of rotation of the rotor disk) and serves to receive anannular retaining ring 42. In known manner, such aring 42 serves to hold the blades axially in theslots 38 of the rotor disk and it contributes to ventilating the blade roots. -
FIGS. 7A and 7B are fragmentary views showing a plurality ofblades 10″′ in a fourth embodiment of the invention that are mounted on arotor disk 36 similar to that described with reference toFIG. 4 . - Compared with the first embodiment, the
blade 10″′ here described differs in that one of themetal plates 26″′ fastened to theroot 14 is longer than the other plate 28 (i.e. it projects axially downstream relative to the other plate 28) and has anotch 44 at its downstream axial end for the purpose of co-operating with atooth 46 on anannular sealing plate 48. - Such an assembly serves to hold the
blade 10″′ on therotor disk 36 by jaw clutching. More precisely, the sealingplate 48 is initially brought against the downstream face of the rotor disk with itsteeth 46 positioned between pairs of adjacent blade roots (FIG. 7A ). Thereafter, as shown inFIG. 7B , the sealingplate 48 is pivoted angularly about its axis (counterclockwise inFIG. 7B ) so that eachtooth 46 is received in anotch 44 of themetal plate 26″′ of a blade root, thereby holding the blades axially in theslots 38 of the rotor disk.
Claims (8)
1. A turbomachine blade made of composite material, including fiber reinforcement, the blade being obtained by three-dimensionally weaving yarns and densifying with a matrix, and comprising a single piece constituting both the airfoil and the root of the blade, the blade root having two substantially plane opposite side flanks that are formed in register respectively with the pressure side and suction side surfaces of the airfoil, wherein the blade root is clamped between two metal plates that are fastened against the side flanks of the blade root.
2. A blade according to claim 1 , wherein one of the metal plates has a rim that is received under the blade root.
3. A blade according to claim 1 , wherein at least one of the metal plates has a hook at an axially downstream end thereof, the hook being designed to receive a retaining ring.
4. A blade according to claim 1 , wherein at least one of the metal plates includes a notch at an axially downstream end thereof, the notch being designed to co-operate with a tooth of an annular sealing plate.
5. A blade according to claim 1 , wherein the metal plates are fastened against the side flanks of the blade root by welding at least one stud that passes through the plates and the blade root in a direction that is substantially perpendicular to its side flanks.
6. A blade according to claim 1 , wherein the metal plates are machined to be dovetail-shaped.
7. A turbomachine rotor disk including a plurality of substantially axial metal slots at its outer periphery, wherein the disk further includes a plurality of blades according to claim 1 , each blade having its root mounted in a slot of the disk.
8. A turbomachine including at least one rotor disk according to claim 7 .
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0950514A FR2941487B1 (en) | 2009-01-28 | 2009-01-28 | TURBOMACHINE DRAFT IN COMPOSITE MATERIAL WITH A REINFORCED FOOT |
FR0950514 | 2009-01-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100189562A1 true US20100189562A1 (en) | 2010-07-29 |
Family
ID=40909761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/685,182 Abandoned US20100189562A1 (en) | 2009-01-28 | 2010-01-11 | Composite material turbomachine blade with a reinforced root |
Country Status (2)
Country | Link |
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US (1) | US20100189562A1 (en) |
FR (1) | FR2941487B1 (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120027605A1 (en) * | 2010-07-27 | 2012-02-02 | Snecma Propulsion Solide | Turbomachine blade, a rotor, a low pressure turbine, and a turbomachine fitted with such a blade |
US20120051924A1 (en) * | 2010-08-31 | 2012-03-01 | General Electric Company | Turbine Blade Assembly |
US20130052020A1 (en) * | 2011-08-23 | 2013-02-28 | General Electric Company | Coupled blade platforms and methods of sealing |
DE102012018744A1 (en) * | 2011-09-30 | 2013-04-04 | Alstom Technology Ltd. | Retrofit process and equipment for large steam turbines |
US20140308134A1 (en) * | 2013-04-11 | 2014-10-16 | Snecma | Turbomachine vane cooperating with a vane retention disk |
US8864471B2 (en) | 2011-08-12 | 2014-10-21 | Hamilton Sundstrand Corporation | Gas turbine rotor with purge blades |
WO2014191670A1 (en) | 2013-05-28 | 2014-12-04 | Herakles | Rotor disk blade with friction-held root, rotor disk, turbomachine and associated assembly method |
US20150050158A1 (en) * | 2013-03-13 | 2015-02-19 | Rolls-Royce Corporation | Gas turbine engine component including a compliant layer |
CN104420889A (en) * | 2013-08-28 | 2015-03-18 | 航空技术空间股份有限公司 | Composite blade made by additive manufacturing |
US20150132118A1 (en) * | 2012-06-20 | 2015-05-14 | Ihi Aerospace Co., Ltd. | Coupling part structure for vane and jet engine including the same |
CN104685161A (en) * | 2012-09-26 | 2015-06-03 | 斯奈克玛 | Vane for a turbine engine, made of composite material and having a bulb-shaped base |
CN104812950A (en) * | 2012-12-05 | 2015-07-29 | 斯奈克玛 | Method for manufacturing turbine engine blade root of composite material and blade root obtained by such method |
US9422818B2 (en) | 2010-06-25 | 2016-08-23 | Snecma | Gas turbine engine rotor wheel having composite material blades with blade-root to disk connection being obtained by clamping |
JP2016166603A (en) * | 2015-02-23 | 2016-09-15 | ゼネラル・エレクトリック・カンパニイ | Hybrid metal and composite spool for rotating machinery |
US9638042B2 (en) | 2011-04-28 | 2017-05-02 | Snecma | Turbine engine comprising a metal protection for a composite part |
DE102016219818A1 (en) * | 2016-10-12 | 2018-04-12 | Rolls-Royce Deutschland Ltd & Co Kg | Blade assembly with ring segment or disc segment-shaped blade carrier and radially inner stiffening structure |
US20180340440A1 (en) * | 2017-05-23 | 2018-11-29 | Rolls-Royce North American Technologies Inc. | Turbine shroud assembly having ceramic matrix composite track segments with metallic attachment features |
US10519788B2 (en) | 2013-05-29 | 2019-12-31 | General Electric Company | Composite airfoil metal patch |
US10794188B2 (en) | 2016-10-12 | 2020-10-06 | Rolls-Royce Deutschland Ltd & Co Kg | Rotor blade assembly comprising a ring-shaped or disc-shaped blade carrier and a radially inner reinforcement structure |
US11480061B2 (en) * | 2019-02-07 | 2022-10-25 | General Electric Company | Method for replacing metal airfoil with ceramic airfoil, and related turbomachine blade |
US20240018875A1 (en) * | 2021-01-15 | 2024-01-18 | Raytheon Technologies Corporation | Vane with pin mount and anti-rotation |
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US4045149A (en) * | 1976-02-03 | 1977-08-30 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Platform for a swing root turbomachinery blade |
FR2685732B1 (en) * | 1991-12-31 | 1994-02-25 | Snecma | BLADE OF TURBOMACHINE IN COMPOSITE MATERIAL. |
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Cited By (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9422818B2 (en) | 2010-06-25 | 2016-08-23 | Snecma | Gas turbine engine rotor wheel having composite material blades with blade-root to disk connection being obtained by clamping |
US8951017B2 (en) * | 2010-07-27 | 2015-02-10 | Snecma | Turbomachine blade, a rotor, a low pressure turbine, and a turbomachine fitted with such a blade |
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FR2941487A1 (en) | 2010-07-30 |
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