Rotary kinetic fluid motors or pumps – With separating means or guard for solid matter in working...
Reexamination Certificate
2001-01-05
2002-10-15
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
With separating means or guard for solid matter in working...
C415S116000, C415S169100, C416S095000, C416S09600A
Reexamination Certificate
active
06464455
ABSTRACT:
BACKGROUND OF THE INVENTION
Steam cooling of gas turbine buckets is susceptible to debris generated downstream of filters, in that the debris may collect in radially outer extremities (tip turns) of the buckets that are to be cooled, thereby building up a cooling path blockage over time and reducing the cooling capability at the bucket tip by forming a layer of debris that insulates the hot bucket tip surfaces from the cooling medium.
BRIEF SUMMARY OF THE INVENTION
This invention provides a cooling circuit arrangement which collects and traps debris present in the steam cooling medium in a region of the bucket cooling circuit where it does not effect the cooling task of the steam, i.e., upstream of the buckets.
More specifically, the path of the cooling steam supplied to the first and second stage buckets of a gas turbine manufactured by the assignee of this invention passes through a relatively low velocity steam manifold before exiting the manifold through higher velocity feed tubes which carry the steam to the buckets. At this location in the cooling path, centrifugal loads on the debris force the debris to collect in a radially outermost region of the manifold, away from the primary flow stream lines. To this end, the manifold extends radially beyond the bucket feed tubes to thereby create a recessed trap region which collects the solid particles and other debris under the centrifugal loading created by the rotating rotor. In the exemplary embodiment, here are ten such manifolds arranged in an annular array about the turbine rotor, each manifold segment extending approximately 36°.
Accordingly, the present invention relates to a gas turbine having a rotor and a plurality of stages, each stage comprising a row of buckets supported on a wheel mounted on the rotor for rotation therewith; and wherein the buckets of at least one of the stages are cooled by air or steam, the improvement comprising at least one axially extending coolant supply conduit communicating with a coolant supply manifold; one or more axially extending coolant feed tubes connected to the manifold at a location radially outwardly of the coolant supply conduit, the one or more feed tubes arranged to supply coolant to one or more buckets of at least one of the plurality of stages; the manifold extending radially beyond the one or more axially extending feed tubes to thereby create a debris trap region for collecting debris under centrifugal loading caused by rotation of the rotor.
REFERENCES:
patent: 3443790 (1969-05-01), Buckland
patent: 4309147 (1982-01-01), Koster et al.
patent: 4462204 (1984-07-01), Hull
patent: 4730978 (1988-03-01), Baran, Jr.
patent: 5558496 (1996-09-01), Woodmansee et al.
patent: 5819525 (1998-10-01), Gaul et al.
patent: 5983623 (1999-11-01), Aoki et al.
patent: 0 735 238 (1996-10-01), None
“39thGE Turbine State-of-the-Art Technology Seminar”, Tab 1,““F” Technology—the First Half-Million Operating Hours”, H.E. Miller, August 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 2, “GE Heavy-Duty Gas Turbine Performance Characteristics”, F. J. Brooks, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 3, “9EC 50Hz 170-MW Class Gas Turbine”, A. S. Arrao, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 4, “MWS6001FA—An Advanced-Technology 70-MW Class 50/60 Hz Gas Turbine”, Ramachandran et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 5, “Turbomachinery Technology Advances at Nuovo Pignone”, Benvenuti et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 6, “GE Aeroderivative Gas Turbines—Design and Operating Features”, M.W. Horner, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 7, “Advance Gas Turbine Materials and Coatings”, P.W. Schilke, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 8, “Dry Low NOxCombustion Systems for GE Heavy-Duty Turbines”, L. B. Davis, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 9, “GE Gas Turbine Combustion Flexibility”, M. A. Davi, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 10, “Gas Fuel Clean-up System Design Considerations for GE Heavy-Duty Gas Turbines”, C. Wilkes, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 11, “Integrated Control Systems for Advanced Combined Cycles”, Chu et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 12, “Power Systems for the 21st Century “H” Gas Turbine Combined Cycles”, Paul et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 13, “Clean Coal and Heavy Oil Technologies for Gas Turbines”, D. M. Todd, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 14, “Gas Turbine Conversions, Modifications and Uprates Technology”, Stuck et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 15, “Performance and Reliability Improvements for Heavy-Duty Gas Turbines,” J. R. Johnston, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 16, “Gas Turbine Repair Technology”, Crimi et al, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 17, “Heavy Duty Turbine Operating & Maintenance Considerations”, R. F. Hoeft, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 18, “Gas Turbine Performance Monitoring and Testing”, Schmitt et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 19, “Monitoring Service Delivery System and Diagnostics”, Madej et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 20, “Steam Turbines for Large Power Applications”, Reinker et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 21, “Steam Turbines for Ultrasupercritical Power Plants”, Retzlaff et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 22, “Steam Turbine Sustained Efficiency”, P. Schofield, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 23, “Recent Advances in Steam Turbines for Industrial and Cogeneration Applications”, Leger et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 24, “Mechanical Drive Steam Turbines”, D. R. Leger, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 25, “Steam Turbines for STAG™ Combined-Cycle Power Systems”, M. Boss, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 26, “Cogeneration Application Considerations”, Fisk et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 27, “Performance and Economic Considerations of Repowering Steam Power Plants”, Stoll et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 28, “High-Power-Density™ Steam Turbine Design Evolution”, J. H. Moore, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 29, “Advances in Steam Path Technologies”, Cofer, IV, et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 30, “Upgradable Opportunities for Steam Turbines”, D. R. Dreier, Jr., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 31, “Uprate Options for Industrial Turbines”, R. C. Beck, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 32, “Thermal Performance Evaluation and Assessment of Steam Turbine Units”, P. Albert, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 33, “Advances in Welding Repair Technology” J. F. Nolan, Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 34, “Operation and Maintenance Strategies to Enhance Plant Profitability”, MacGillivray et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 35, “Generator Insitu Inspections”, D. Stanton.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 36, “Generator Upgrade and Rewind”, Halpern et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Seminar”, Tab 37, “GE Combined Cycle Product Line and Performance”, Chase, et al., Aug. 1996.
“39th GE Turbine State-of-the-Art Technology Semina
Edgar Richard A.
Look Edward K.
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