US20130004290A1 - Turbo-Machinery With Flow Deflector System - Google Patents
Turbo-Machinery With Flow Deflector System Download PDFInfo
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- US20130004290A1 US20130004290A1 US13/171,521 US201113171521A US2013004290A1 US 20130004290 A1 US20130004290 A1 US 20130004290A1 US 201113171521 A US201113171521 A US 201113171521A US 2013004290 A1 US2013004290 A1 US 2013004290A1
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- Prior art keywords
- nozzle
- bucket
- turbo
- flow
- deflector
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Classifications
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- 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
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
- F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
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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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
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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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/12—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part
- F01D11/127—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part with a deformable or crushable structure, e.g. honeycomb
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/28—Arrangement of seals
Definitions
- the present application and the resultant patent relate generally to turbo-machinery and more particularly relate to a steam turbine with a flow deflector system having extensions to restrict leakage flow in both axial and radial directions for improved efficiency.
- turbo-machinery such as steam turbines, gas turbines, and the like include alternating rows of rotating airfoils or buckets and rows of stationary airfoils or nozzles.
- Each row of rotating airfoils may be attached to a rotor for rotation therewith.
- Each row of stationary airfoils may be attached at one end to a casing with each of the stationary airfoil extending radially inward toward a packing ring and the rotor.
- the packing ring may have seal strips extending from both the rotating and stationary surfaces so as to form a clearance therebetween. Other configurations may be used.
- the rotating and the stationary airfoils expand the flow of fluid therethrough.
- the pressure of the fluid decreases.
- the fluid pressure on the downstream side of a row of stationary airfoils is less than the pressure on the upstream side of the same row.
- the fluid will seek the path of least resistance such that leakage may occur through the packing ring clearance between the stationary airfoil and the rotor.
- This leakage flow may enter radially into the main flow path upstream of the rotating airfoil.
- the leakage flow may mix randomly with the mainstream flow and cause increase mixing or intrusion losses. Both the random mixing of the clearance flow with the main flow caused by intrusion and the higher packing ring clearance flow losses will degrade overall turbine performance and efficiency.
- turbo-machinery so as to limit both intrusion losses and overall clearance leakage flows so as to improve overall efficiency. Limiting such leakage flow results in more of the working fluid producing useful work.
- clearance leakage flow improvements may be provided without the use of expensive and complex brush seals or other types of components subject to wear and tear.
- the present application and the resultant patent thus provide a turbo-machine.
- the turbo-machine may include a number of buckets, a number of nozzles, and a flow deflector system.
- the flow deflector system may include a bucket deflector and a nozzle deflector so as to limit leakage flow losses therethrough so as to improve overall efficiency.
- the present application and the resultant patent further provide a method of limiting leakage flow losses in a turbine.
- the method may include the steps of flowing a leakage flow through a nozzle clearance, placing a bucket extension into an axial gap between a bucket and a nozzle adjacent to the nozzle clearance, overlapping the bucket extension in the axial gap with a nozzle extension so as to limit the leakage flow therethrough, and directing the leakage flow exiting the axial gap in a direction of a main flow.
- the present application and the resultant patent further provide a flow deflector system.
- the flow director system may include a bucket deflector positioned about a bucket, a nozzle deflector positioned about a nozzle, and a nozzle abradable positioned about the nozzle deflector and/or a bucket abradable positioned about the bucket deflector.
- FIG. 1 is a schematic view of a section of a turbine.
- FIG. 2 is a schematic view of a portion of a turbine with a flow deflector system as may be described herein.
- FIG. 3 is a partial side cross-sectional view of the flow deflector system of FIG. 2 .
- FIG. 4 is a partial side cross-sectional view of an alternative embodiment of a flow deflector system as may be described herein.
- FIG. 5 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein.
- FIG. 6 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein
- FIG. 7 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein.
- FIG. 8 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein.
- FIG. 9 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein.
- FIG. 10 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein
- FIG. 11 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein.
- FIG. 12 is a schematic view of a portion of a compressor with a flow deflector system as may be described herein.
- FIG. 1 shows a portion of a turbo-machine 10 .
- the turbo-machine 10 may be a steam turbine 15 .
- a gas turbine and other configurations and types of turbo-machinery also may be used herein.
- the steam turbine 15 includes a number of rotating airfoils or buckets 20 .
- the rotating airfoils 20 may be attached to a rotor 25 for rotation therewith.
- the rotating airfoils 20 may be positioned between rows of a number of stationary airfoils or nozzles 30 .
- the stationary airfoils 30 extend from a casing 35 on one end to a packing ring 40 on the other.
- the packing ring 40 may have a number of seal strips 45 positioned on both the stationary airfoil 30 and the rotor 25 .
- a packing ring clearance 50 may extend between the stationary airfoil 30 and the rotor 25 .
- a leakage flow 55 may extend therethrough. The nature of the leakage flow 55 may vary. Other components and other configurations may be used herein.
- FIG. 2 shows a portion of a turbo-machine 100 as may be described herein.
- the turbo-machine 100 may be a steam turbine 110 .
- Gas turbines and other turbo-machinery also may be used herein.
- the steam turbine 110 may include a number of rotating airfoils or buckets 120 .
- the buckets 120 may be attached to a rotor 130 and a disk 140 .
- the steam turbine 110 may include a number of stationary airfoils or nozzles 150 .
- the nozzles 150 may extend radially towards the rotor 130 and a packing ring 160 on one end thereof.
- a packing ring clearance 170 may extend between the packing ring 160 and the rotor 130 .
- a main flow 180 may pass between the buckets 120 and the nozzles 150
- a leakage flow 190 may seek to escape via the packing ring clearance 170 and into an axial gap 195 between the buckets 120 and the nozzles 150 .
- the steam turbine 110 also may include a leakage flow deflector system 200 .
- the leakage flow deflector system 200 may include a bucket deflector 210 .
- the bucket deflector 210 may include an upstream bucket extension 220 on an upstream side 230 thereof and a downstream bucket extension 240 on a downstream side thereof.
- the bucket extensions 220 , 240 may extend from the disk 140 beneath the bucket 120 and extend into the axial gap 195 .
- the bucket extensions 220 , 240 are shown as having a largely rectangular, blunted shape 260 any desired size or shape may be used herein.
- the flow deflector system 200 also may include a nozzle deflector 270 positioned about each nozzle 150 .
- the nozzle deflector 270 may include an upstream nozzle extension 280 positioned on an upstream side 290 thereof and a downstream nozzle extension positioned on a downstream side 310 thereof.
- the nozzle extensions 280 , 300 may extend into the axial gap 195 .
- the blade extensions 220 , 240 and the nozzle extensions 280 , 300 may overlap each other to a varying extent.
- the nozzle extensions 280 , 300 are shown as having a rectangular blunt shape 320 , any size or shape may be used herein.
- blade extensions 220 , 240 are shown on top of the nozzle extensions 280 , 300 , the nozzle extensions 280 , 300 may be on top and/or one blade extension 220 , 240 may be on top and one nozzle extension 280 , 300 may be on top in any configuration.
- the nozzle deflector 270 also may include a honeycomb or an amount of abradable material positioned under the nozzle extensions 280 , 300 and in line with the bucket extensions 220 , 240 as a nozzle abradable 330 .
- the use of the abradable material prevents possible damage to the blade extensions 220 , 240 .
- the abradable material may be of a conventional nature.
- the nozzle abradable 330 may have different sizes and shapes.
- the abradable material may be applied directly to the nozzle cavity or attached to a plate that may be positioned within the nozzle cavity. Other types of attachment methods may be used herein.
- the leakage flow 190 may pass through the packing ring clearance 170 .
- the overlap of the downstream nozzle extension 300 and the upstream bucket extension 220 creates resistance to the leakage flow 190 passing into the axial gap 195 .
- Such increased resistance thus limits the leakage flow 190 therethrough.
- the leakage flow 190 that does pass therethrough is now directed in the same direction as the main flow 180 .
- intrusion losses caused by random mixing between the leakage flow 190 and the main flow 180 may be reduced.
- the reduction in both the volume of the leakage flow 190 and the random mixing caused by the intrusion of the leakage flow 190 into the main flow 180 thus promotes overall turbo-machine efficiency.
- the blade extensions 220 , 240 may extend in close proximity to the nozzle abradable 330 of the nozzles 150 .
- the spacing of the blade extensions 220 and the nozzle abradable 330 may be increased as is shown in FIG. 4 so as to provide for an extension gap 340 therebetween.
- Different sizes, spacings, and configurations may be used herein.
- the extensions themselves may have different shapes.
- the blade extensions 220 , 240 may extend to a sharp tip 350 (similar to FIG. 9 ).
- a vertical tip 355 also may be used. The vertical tip 355 may extend upwardly or downwardly.
- the blade extensions 220 , 240 also may use a blade abradable 360 thereon as is shown in FIG. 7 (similar to FIG. 12 ).
- the nozzles 150 may include a nozzle cavity 370 instead of the use of the nozzle abradable 330 .
- the nozzle extensions 280 , 300 may extend into a downward flange 380 as is shown in FIG.
- FIG. 8 a blunt tip 390 as is shown in FIG. 9 , a sharp vertical tip 400 (upward or downward) as shown in FIG. 10 , or a sharp tip 410 as shown in FIG. 11 .
- a blunt tip 390 as is shown in FIG. 9
- a sharp vertical tip 400 upward or downward
- a sharp tip 410 as shown in FIG. 11 .
- Many different configurations and designs may be used herein.
- the flow deflector system 200 thus reduces the total leakage flow 190 and the losses caused by the intrusion of the leakage flow 190 into the main flow 180 . Such reductions provide an increase in overall system efficiency without the use of expensive or complex brush seals.
- the flow deflector system 200 limits both radial and axial clearances and redirects the leakage flow 190 in the direction of the main flow 180 . Moreover, overall blade loading may be improved.
- the flow deflector system 200 may be used with high pressure, intermediate pressure, and/or low pressure sections of the steam turbine 110 and otherwise.
- the flow deflector system 200 also may be used with any type of turbo-machinery 100 .
- FIG. 12 shows a further embodiment of a turbo-machine 100 as may be described herein.
- the turbo-machine 100 may be in the form of a compressor 420 .
- the compressor 420 may use the flow deflection system 200 as described above with the bucket deflector 210 and the nozzle deflector 270 .
- the nozzle 150 includes the upstream nozzle extension 280 , the downstream nozzle extension 300 , and the nozzle abradable 330 .
- the bucket deflector 210 includes the upstream bucket extension 220 , the downstream bucket extension 240 , and the bucket abradable 360 .
- the main flow 180 is compressed such that the pressure is increased as the flow moves downstream.
- the leakage flow 190 thus is leaked from the downstream side 250 of the bucket 120 and heads toward the upstream side 290 .
- the leakage flow 190 thus may be blocked by the upstream nozzle extension 280 in combination with the downstream bucket extension 240 and the bucket abradable 360 .
- Other components and other configurations may be used herein.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present application provides a turbo-machine. The turbo-machine may include a number of buckets, a number of nozzles, and a flow deflector system. The flow deflector system may include a bucket deflector and a nozzle deflector so as to limit leakage flow losses therethrough.
Description
- The present application and the resultant patent relate generally to turbo-machinery and more particularly relate to a steam turbine with a flow deflector system having extensions to restrict leakage flow in both axial and radial directions for improved efficiency.
- Generally described, turbo-machinery such as steam turbines, gas turbines, and the like include alternating rows of rotating airfoils or buckets and rows of stationary airfoils or nozzles. Each row of rotating airfoils may be attached to a rotor for rotation therewith. Each row of stationary airfoils may be attached at one end to a casing with each of the stationary airfoil extending radially inward toward a packing ring and the rotor. The packing ring may have seal strips extending from both the rotating and stationary surfaces so as to form a clearance therebetween. Other configurations may be used.
- In operation, the rotating and the stationary airfoils expand the flow of fluid therethrough. As the fluid passes axially through the turbine, the pressure of the fluid decreases. For example, the fluid pressure on the downstream side of a row of stationary airfoils is less than the pressure on the upstream side of the same row. The fluid will seek the path of least resistance such that leakage may occur through the packing ring clearance between the stationary airfoil and the rotor. This leakage flow may enter radially into the main flow path upstream of the rotating airfoil. The leakage flow may mix randomly with the mainstream flow and cause increase mixing or intrusion losses. Both the random mixing of the clearance flow with the main flow caused by intrusion and the higher packing ring clearance flow losses will degrade overall turbine performance and efficiency.
- There is therefore a desire for improved turbo-machinery so as to limit both intrusion losses and overall clearance leakage flows so as to improve overall efficiency. Limiting such leakage flow results in more of the working fluid producing useful work. Preferably, such clearance leakage flow improvements may be provided without the use of expensive and complex brush seals or other types of components subject to wear and tear.
- The present application and the resultant patent thus provide a turbo-machine. The turbo-machine may include a number of buckets, a number of nozzles, and a flow deflector system. The flow deflector system may include a bucket deflector and a nozzle deflector so as to limit leakage flow losses therethrough so as to improve overall efficiency.
- The present application and the resultant patent further provide a method of limiting leakage flow losses in a turbine. The method may include the steps of flowing a leakage flow through a nozzle clearance, placing a bucket extension into an axial gap between a bucket and a nozzle adjacent to the nozzle clearance, overlapping the bucket extension in the axial gap with a nozzle extension so as to limit the leakage flow therethrough, and directing the leakage flow exiting the axial gap in a direction of a main flow.
- The present application and the resultant patent further provide a flow deflector system. The flow director system may include a bucket deflector positioned about a bucket, a nozzle deflector positioned about a nozzle, and a nozzle abradable positioned about the nozzle deflector and/or a bucket abradable positioned about the bucket deflector.
- These and other features and improvements of the present application and the resultant patent will become apparent to one of ordinary skill in the art upon review of the following detailed description when taken in conjunction with the several drawings and the appended claims. The several embodiments shown herein are by way of example only.
-
FIG. 1 is a schematic view of a section of a turbine. -
FIG. 2 is a schematic view of a portion of a turbine with a flow deflector system as may be described herein. -
FIG. 3 is a partial side cross-sectional view of the flow deflector system ofFIG. 2 . -
FIG. 4 is a partial side cross-sectional view of an alternative embodiment of a flow deflector system as may be described herein. -
FIG. 5 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein. -
FIG. 6 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein -
FIG. 7 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein. -
FIG. 8 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein. -
FIG. 9 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein. -
FIG. 10 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein -
FIG. 11 is a partial side plan view of an alternative embodiment of a flow deflector system as may be described herein. -
FIG. 12 is a schematic view of a portion of a compressor with a flow deflector system as may be described herein. - Referring now to the drawings, in which like numerals refer to like elements throughout the several views,
FIG. 1 shows a portion of a turbo-machine 10. In this example, the turbo-machine 10 may be asteam turbine 15. A gas turbine and other configurations and types of turbo-machinery also may be used herein. As described above, thesteam turbine 15 includes a number of rotating airfoils orbuckets 20. Therotating airfoils 20 may be attached to arotor 25 for rotation therewith. Therotating airfoils 20 may be positioned between rows of a number of stationary airfoils ornozzles 30. Thestationary airfoils 30 extend from acasing 35 on one end to apacking ring 40 on the other. Thepacking ring 40 may have a number ofseal strips 45 positioned on both thestationary airfoil 30 and therotor 25. A packing ring clearance 50 may extend between thestationary airfoil 30 and therotor 25. Aleakage flow 55 may extend therethrough. The nature of theleakage flow 55 may vary. Other components and other configurations may be used herein. -
FIG. 2 shows a portion of a turbo-machine 100 as may be described herein. As above, the turbo-machine 100 may be asteam turbine 110. Gas turbines and other turbo-machinery also may be used herein. Thesteam turbine 110 may include a number of rotating airfoils orbuckets 120. Thebuckets 120 may be attached to arotor 130 and adisk 140. Likewise, thesteam turbine 110 may include a number of stationary airfoils ornozzles 150. Thenozzles 150 may extend radially towards therotor 130 and apacking ring 160 on one end thereof. Apacking ring clearance 170 may extend between thepacking ring 160 and therotor 130. While amain flow 180 may pass between thebuckets 120 and thenozzles 150, aleakage flow 190 may seek to escape via thepacking ring clearance 170 and into anaxial gap 195 between thebuckets 120 and thenozzles 150. - The
steam turbine 110 also may include a leakageflow deflector system 200. The leakageflow deflector system 200 may include abucket deflector 210. Thebucket deflector 210 may include anupstream bucket extension 220 on anupstream side 230 thereof and adownstream bucket extension 240 on a downstream side thereof. Thebucket extensions disk 140 beneath thebucket 120 and extend into theaxial gap 195. Although thebucket extensions shape 260 any desired size or shape may be used herein. - The
flow deflector system 200 also may include anozzle deflector 270 positioned about eachnozzle 150. Thenozzle deflector 270 may include anupstream nozzle extension 280 positioned on anupstream side 290 thereof and a downstream nozzle extension positioned on adownstream side 310 thereof. Thenozzle extensions axial gap 195. Theblade extensions nozzle extensions nozzle extensions blunt shape 320, any size or shape may be used herein. Likewise, although theblade extensions nozzle extensions nozzle extensions blade extension nozzle extension - The
nozzle deflector 270 also may include a honeycomb or an amount of abradable material positioned under thenozzle extensions bucket extensions nozzle abradable 330. The use of the abradable material prevents possible damage to theblade extensions - In use, the
leakage flow 190 may pass through thepacking ring clearance 170. As theleakage flow 190 reaches thedownstream side 310 of thenozzle 150, the overlap of thedownstream nozzle extension 300 and theupstream bucket extension 220 creates resistance to theleakage flow 190 passing into theaxial gap 195. Such increased resistance thus limits theleakage flow 190 therethrough. Further, theleakage flow 190 that does pass therethrough is now directed in the same direction as themain flow 180. As a result, intrusion losses caused by random mixing between theleakage flow 190 and themain flow 180 may be reduced. The reduction in both the volume of theleakage flow 190 and the random mixing caused by the intrusion of theleakage flow 190 into themain flow 180 thus promotes overall turbo-machine efficiency. - Various modifications and embodiments may be used herein. As is shown in
FIG. 3 , for example, theblade extensions nozzle abradable 330 of thenozzles 150. Alternatively, the spacing of theblade extensions 220 and thenozzle abradable 330 may be increased as is shown inFIG. 4 so as to provide for anextension gap 340 therebetween. Different sizes, spacings, and configurations may be used herein. - Likewise, the extensions themselves may have different shapes. As is shown in
FIG. 5 , theblade extensions FIG. 9 ). As is shown inFIG. 6 , avertical tip 355 also may be used. Thevertical tip 355 may extend upwardly or downwardly. Likewise, theblade extensions blade abradable 360 thereon as is shown inFIG. 7 (similar toFIG. 12 ). Similarly, thenozzles 150 may include anozzle cavity 370 instead of the use of thenozzle abradable 330. Likewise, thenozzle extensions downward flange 380 as is shown inFIG. 8 , ablunt tip 390 as is shown inFIG. 9 , a sharp vertical tip 400 (upward or downward) as shown inFIG. 10 , or asharp tip 410 as shown inFIG. 11 . Many different configurations and designs may be used herein. - The
flow deflector system 200 thus reduces thetotal leakage flow 190 and the losses caused by the intrusion of theleakage flow 190 into themain flow 180. Such reductions provide an increase in overall system efficiency without the use of expensive or complex brush seals. Theflow deflector system 200 limits both radial and axial clearances and redirects theleakage flow 190 in the direction of themain flow 180. Moreover, overall blade loading may be improved. Theflow deflector system 200 may be used with high pressure, intermediate pressure, and/or low pressure sections of thesteam turbine 110 and otherwise. Theflow deflector system 200 also may be used with any type of turbo-machinery 100. -
FIG. 12 shows a further embodiment of a turbo-machine 100 as may be described herein. In this example, the turbo-machine 100 may be in the form of acompressor 420. Thecompressor 420 may use theflow deflection system 200 as described above with thebucket deflector 210 and thenozzle deflector 270. In this case, thenozzle 150 includes theupstream nozzle extension 280, thedownstream nozzle extension 300, and thenozzle abradable 330. Likewise, thebucket deflector 210 includes theupstream bucket extension 220, thedownstream bucket extension 240, and thebucket abradable 360. - In this example, the
main flow 180 is compressed such that the pressure is increased as the flow moves downstream. Theleakage flow 190 thus is leaked from thedownstream side 250 of thebucket 120 and heads toward theupstream side 290. Theleakage flow 190 thus may be blocked by theupstream nozzle extension 280 in combination with thedownstream bucket extension 240 and thebucket abradable 360. Other components and other configurations may be used herein. - It should be apparent that the foregoing relates only to certain embodiments of the present application and the resultant patent. Numerous changes and modifications may be made herein by one of ordinary skill in the art without departing from the general spirit and scope of the invention as defined by the following claims and the equivalents thereof.
Claims (20)
1. A turbo-machine, comprising:
a plurality of buckets;
a plurality of nozzles; and
a flow deflector system;
the flow deflector system comprising a bucket deflector and a nozzle deflector so as to limit leakage flow losses therethrough.
2. The turbo-machine of claim 1 , wherein the bucket deflector comprises one or more bucket extensions.
3. The turbo-machine of claim 2 , wherein the one or more bucket extensions comprise an upstream extension.
4. The turbo-machine of claim 2 , wherein the one or more bucket extensions comprise a downstream extension.
5. The turbo-machine of claim 2 , wherein the one or more bucket extensions comprise a blunt shape or a tip.
6. The turbo-machine of claim 2 , wherein the one or more bucket extensions comprise a bucket abradable.
7. The turbo-machine of claim 1 , wherein the nozzle deflector comprises one or more nozzle extensions.
8. The turbo-machine of claim 7 , wherein the one or more nozzle extensions comprise an upstream extension.
9. The turbo-machine of claim 7 , wherein the one or more nozzle extensions comprise a downstream extension.
10. The turbo-machine of claim 7 , wherein the one or more nozzle extensions comprise a nozzle abradable.
11. The turbo-machine of claim 7 , wherein the one or more nozzle extensions comprise a nozzle cavity.
12. The turbo-machine of claim 7 , wherein the one or more nozzle extensions comprise a flange, blunt shape, or tip.
13. The turbo-machine of claim 1 , further comprising a turbine.
14. The turbo-machine of claim 1 , further comprising a compressor.
15. A method of limiting leakage flow losses in a turbine, comprising:
flowing a leakage flow through a nozzle clearance;
placing a bucket extension into an axial gap between a bucket and a nozzle adjacent to the nozzle clearance;
overlapping the bucket extension in the axial gap with a nozzle extension to limit the leakage flow therethrough; and
directing the leakage flow exiting the axial gap in a direction of a main flow.
16. A flow deflector system, comprising:
a bucket deflector positioned about a bucket;
a nozzle deflector positioned about a nozzle; and
a nozzle abradable positioned about the nozzle deflector and/or a bucket abradable positioned about the bucket deflector.
17. The flow deflector system of claim 16 , wherein the bucket deflector comprises an upstream extension and/or a downstream extension.
18. The flow deflector system of claim 16 , wherein the nozzle deflector comprises an upstream extension and/or downstream extension
19. The flow deflector system of claim 16 , wherein the flow deflector system is mounted within a turbine.
20. The flow deflector system of claim 16 , wherein the flow deflector system is mounted within a compressor.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/171,521 US20130004290A1 (en) | 2011-06-29 | 2011-06-29 | Turbo-Machinery With Flow Deflector System |
DE102012105504A DE102012105504A1 (en) | 2011-06-29 | 2012-06-25 | Turbomachine with flow deflection system |
FR1256048A FR2977275A1 (en) | 2011-06-29 | 2012-06-26 | TURBOMACHINE WITH FLOW DEFLECTING SYSTEM |
RU2012126863/06A RU2012126863A (en) | 2011-06-29 | 2012-06-28 | TURBO INSTALLATION, METHOD FOR RESTRICTING LOSSES DUE TO LEAK FLOW IN TURBINE AND FLOW DECLINK DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US13/171,521 US20130004290A1 (en) | 2011-06-29 | 2011-06-29 | Turbo-Machinery With Flow Deflector System |
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US20130004290A1 true US20130004290A1 (en) | 2013-01-03 |
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US13/171,521 Abandoned US20130004290A1 (en) | 2011-06-29 | 2011-06-29 | Turbo-Machinery With Flow Deflector System |
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US (1) | US20130004290A1 (en) |
DE (1) | DE102012105504A1 (en) |
FR (1) | FR2977275A1 (en) |
RU (1) | RU2012126863A (en) |
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CN103939151A (en) * | 2013-01-21 | 2014-07-23 | 通用电气公司 | Turbomachine having swirl-inhibiting seal |
US20160178063A1 (en) * | 2014-12-17 | 2016-06-23 | United Technologies Corporation | Tiered brush seal |
EP3085900A1 (en) * | 2015-04-21 | 2016-10-26 | General Electric Technology GmbH | Abradable lip for a gas turbine |
US11525367B2 (en) * | 2018-11-16 | 2022-12-13 | Safran Aircraft Engines | Sealing between a rotor disc and a stator of a turbomachine |
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FR3039225B1 (en) * | 2015-07-20 | 2017-07-21 | Snecma | TURBOMACHINE, SUCH AS A TURBO AIRCRAFT |
BE1025093B1 (en) | 2017-03-31 | 2018-10-29 | Safran Aero Boosters S.A. | RADIAL BRUSH JOINT ON AXIAL TURBOMACHINE ROTOR |
FR3127518A1 (en) * | 2021-09-28 | 2023-03-31 | Safran Helicopter Engines | TURBOMACHINE STAGE INCLUDING AT LEAST ONE SEAL RING |
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US20070273104A1 (en) * | 2006-05-26 | 2007-11-29 | Siemens Power Generation, Inc. | Abradable labyrinth tooth seal |
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2011
- 2011-06-29 US US13/171,521 patent/US20130004290A1/en not_active Abandoned
-
2012
- 2012-06-25 DE DE102012105504A patent/DE102012105504A1/en not_active Withdrawn
- 2012-06-26 FR FR1256048A patent/FR2977275A1/en not_active Withdrawn
- 2012-06-28 RU RU2012126863/06A patent/RU2012126863A/en not_active Application Discontinuation
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US3262635A (en) * | 1964-11-06 | 1966-07-26 | Gen Electric | Turbomachine sealing means |
US3339933A (en) * | 1965-02-24 | 1967-09-05 | Gen Electric | Rotary seal |
US5967745A (en) * | 1997-03-18 | 1999-10-19 | Mitsubishi Heavy Industries, Ltd. | Gas turbine shroud and platform seal system |
US20040265118A1 (en) * | 2001-12-14 | 2004-12-30 | Shailendra Naik | Gas turbine arrangement |
US20070273104A1 (en) * | 2006-05-26 | 2007-11-29 | Siemens Power Generation, Inc. | Abradable labyrinth tooth seal |
US20080124215A1 (en) * | 2006-11-29 | 2008-05-29 | United Technologies Corporation | Gas turbine engine with concave pocket with knife edge seal |
US20090110548A1 (en) * | 2007-10-30 | 2009-04-30 | Pratt & Whitney Canada Corp. | Abradable rim seal for low pressure turbine stage |
US20090238683A1 (en) * | 2008-03-24 | 2009-09-24 | United Technologies Corporation | Vane with integral inner air seal |
US20100074734A1 (en) * | 2008-09-25 | 2010-03-25 | Siemens Energy, Inc. | Turbine Seal Assembly |
US20100254806A1 (en) * | 2009-04-06 | 2010-10-07 | General Electric Company | Methods, systems and/or apparatus relating to seals for turbine engines |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103939151A (en) * | 2013-01-21 | 2014-07-23 | 通用电气公司 | Turbomachine having swirl-inhibiting seal |
US20140205444A1 (en) * | 2013-01-21 | 2014-07-24 | General Electric Company | Turbomachine having swirl-inhibiting seal |
US9394800B2 (en) * | 2013-01-21 | 2016-07-19 | General Electric Company | Turbomachine having swirl-inhibiting seal |
US20160178063A1 (en) * | 2014-12-17 | 2016-06-23 | United Technologies Corporation | Tiered brush seal |
US10060533B2 (en) * | 2014-12-17 | 2018-08-28 | United Technologies Corporation | Tiered brush seal |
EP3085900A1 (en) * | 2015-04-21 | 2016-10-26 | General Electric Technology GmbH | Abradable lip for a gas turbine |
US10801352B2 (en) | 2015-04-21 | 2020-10-13 | Ansaldo Energia Switzerland AG | Abradable lip for a gas turbine |
US11525367B2 (en) * | 2018-11-16 | 2022-12-13 | Safran Aircraft Engines | Sealing between a rotor disc and a stator of a turbomachine |
Also Published As
Publication number | Publication date |
---|---|
DE102012105504A1 (en) | 2013-01-03 |
FR2977275A1 (en) | 2013-01-04 |
RU2012126863A (en) | 2014-01-10 |
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Legal Events
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AS | Assignment |
Owner name: GENERAL ELECTRIC COMPANY, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KRISHNAN, PRABAKARAN MODACHUR;REEL/FRAME:026518/0636 Effective date: 20110621 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |