4-GT Internal Components Presentation

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<p>GAS TURBINE</p><p>INTERNAL</p><p>COMPONENTS</p><p>COMPRESSORS</p><p>7FA Compressor Rotor</p><p>in the stacking pit</p><p>7EA Compressor Wheel</p><p>Compressor Blades</p><p>Compressor Blade Production Methods:</p><p>Forging</p><p>Extrusion</p><p>Machining</p><p>Compressor Blade Materials</p><p>-Old Blades- 403 SS w/ NiCad Coating</p><p>IGVs / Stages 1-3 GTD Stainless 450 GTD Stainless 450</p><p>Stages 4-8 GTD Stainless 450 403 Stainless +GECC</p><p>Stages 9-17 403 Stn’lss uncoated 403 Stn’lss uncoated</p><p>F-Class Machines All Others</p><p>-After mid 1995:</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Advanced Gas Turbine Materials & Coatings</p><p>See GER 3569</p><p>Compressor Blade Materials</p><p>GER 3569, page 4</p><p>Compressor Blade Coatings</p><p>HOT GAS PATH COMPONENTS</p><p>Hot Gas Path</p><p>Turbine Nozzles & Buckets</p><p>Most bucket & nozzle castings used by GE are made</p><p>with the conventional Investment Casting process,</p><p>usually under vacuum.</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Nozzle Segment Materials</p><p>Major concentration placed on Hot Gas Path</p><p>components because they are the most critical part</p><p>of the Gas Turbine</p><p>Result:</p><p>Improvements in superalloys & processes that now permit</p><p>the Hot Gas Path components to operate in advanced</p><p>Gas Turbines firing at increased temperatures, for</p><p>thousands of hours, under extreme centrifugal, thermal,</p><p>& vibratory stresses.</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Turbine Nozzle Materials</p><p>1st Stage Nozzles FSX 414 FSX 414</p><p>2nd Stage Nozzles GTD 222 GTD 222</p><p>F-Class Machines All Others</p><p>3rd Stage Nozzles GTD 222 N 155</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Advanced Gas Turbine Materials & Coatings</p><p>See GER 3569</p><p>Turbine Nozzle Materials</p><p>Alignment & Support Details</p><p>First Stage Nozzle</p><p>First Stage</p><p>Shroud Blocks</p><p>GAS FLOW</p><p>7FA 1st Stg Shroud Blocks</p><p>1st stg</p><p>shroud blocks</p><p>1st stg nozzle2nd stg nozzle</p><p>7FA</p><p>7 EA 1st stg Shroud Blocks</p><p>2nd & 3rd Stage Nozzles</p><p>&</p><p>Stg 1,2,&3 Shroud Blocks</p><p>1st</p><p>2nd</p><p>3rdShroud Blocks</p><p>7FA</p><p>2nd Stg. Nozzle</p><p>&Diaphragm Assy.</p><p>3rd Stg. Nozzle</p><p>&Diaphragm Assy.</p><p>1st Stg Nozzle</p><p>Support Ring</p><p>7FA 2nd / 3rd Stg</p><p>7FA 2nd Stg Shroud Blocks</p><p>7EA</p><p>2nd</p><p>Stg</p><p>7EA</p><p>2nd</p><p>Stg</p><p>3rd Stg. Shroud Blocks</p><p>7EA</p><p>3rd</p><p>Stg</p><p>7 EA 3rd Stg Diaph/ Nozzle</p><p>Assy Showing Wheelspace</p><p>TC Conduits</p><p>Inlet Casing</p><p>Inactive Thrust Bearing</p><p>Insert Picture</p><p>Bucket Tip</p><p>Clearance</p><p>Probe Hole</p><p>Shroud Block</p><p>Locating Pin</p><p>Inlet Casing</p><p>Inactive Thrust Bearing</p><p>Insert Picture</p><p>Wheelspace TC</p><p>2nd Stg Aft Side #1</p><p>33.500” Long</p><p>TURBINE ROTATING</p><p>COMPONENTS</p><p>7 FA</p><p>Stg 1</p><p>Stg 2</p><p>Stg 3</p><p>7FA Turbine Forward</p><p>Stub Shaft</p><p>7 EA 2 / 3 Wheel Spacer</p><p>7EA 2nd Stg Wheel</p><p>Twist Lock</p><p>7EA</p><p>1st stg</p><p>Wheel</p><p>Dovetails</p><p>7 FA 1st Stg</p><p>Wheel w/</p><p>Lock Wire</p><p>Groove</p><p>7FA 1st Buckets showing:</p><p>-lock wire installed</p><p>-bucket end cover seals</p><p>7FA 2nd stg buckets showing:</p><p>- cooling holes</p><p>-“Z-lock” integral shroud tips</p><p>7EA 3rd stg Buckets</p><p>Turbine Buckets</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Turbine Buckets</p><p>Directionally Solidified Casting / Cooling Process</p><p>…Orientated grain structure that runs parallel to</p><p>the major axis of the part and contains no</p><p>transverse grain boundaries….</p><p>…Offers additional strength against</p><p>Rupture, and offers enhanced fatigue</p><p>life</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Turbine Buckets & Nozzles</p><p>We are here</p><p>now!</p><p>Elimination of grain boundaries to further reduce</p><p>stress, fatigue, and increase temperature limits</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Turbine Bucket Materials</p><p>1st Stage Buckets GTD 111 GTD 111</p><p>2nd Stage Buckets IN 738 IN 738</p><p>F-Class Machines All Others</p><p>3rd Stage Buckets U500 / IN 738 U500</p><p>Turbine Bucket Materials</p><p>Bucket Coatings</p><p>…The function of all coatings is to provide a surface reservoir</p><p>of elements that will form protective and adherent oxide</p><p>layers protecting the underlying base material from oxidation,</p><p>corrosion, and degradation.</p><p>Sources of Contamination:</p><p>Fuel Supply (Sodium, Potassium,</p><p>Vanadium, Lead)</p><p>Inlet air supply (salt water locations)</p><p>Water/Steam Injection systems</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Why Advanced Materials & Coatings?</p><p>Solutions needed for turbine operating conditions</p><p>incompatible with customer driven operating</p><p>demands:</p><p>-High Firing temperatures & long component life</p><p>-Corrosion Protection from contaminated fuels & air</p><p>-Higher efficiency with fuel flexibility</p><p>1st Stage Buckets</p><p>PLASMAGUARD Coatings</p><p>GT-29 PLUS and GT-33 PLUS for Solid Buckets</p><p>GT-29 IN-PLUS and GT-33 IN-PLUS for Cooled or Hollow Vaned Buckets</p><p>GT-33 Being Used for F Class Machines</p><p>Bucket Coatings</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>Bucket Coatings</p><p>Platinum-Aluminide Coatings</p><p>PLASMAGAURD ™ Coatings</p><p>Thermal Barrier Coating Applied to Bucket Airfoil Section</p><p>Important Points to Remember:</p><p>-GE Advanced Material components require</p><p>specialized repair to insure continued proper</p><p>service of the component.</p><p>-Care must be taken while handling TBC</p><p>components in the field to guard against cracking</p><p>& chipping of protected surfaces.</p><p>-DO NOT label superalloy components with any</p><p>metal-based marking devices (markers/paintsticks)</p><p>GT Construction & Maintenance</p><p>April 2004</p><p>THE END</p>