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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairBucket/Blade ReplacementBucket Cover/Shroud Band
ReplacementBucket/Blade Tenon Weld RepairsTie Wire RepairsLashing
Lug RepairsErosion Shield ReplacementTurbine Rotor MachiningLow
Speed Balancing
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairBucket/Blade Replacement
Replace buckets/blades on turbine rotors. We can:- Remove the
old blades from the wheel- Coordinate blast clean and N.D.E.-
Install new blades- Layout and punch the new covers- Peen tenons -
Finish machine to O.E.M specifications
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairBucket Cover/Shroud Band Replacement
Two methods to perform this work.First Method :- Remove the old
bucket covers/shroud bands- Machine the bucket/blade vane tips to
increase the active tenon height - Install new bucket covers/shroud
bands- Peen tenons- Finish machine to O.E.M specification
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairBucket Cover/Shroud Band Replacement
Second Method : - Remove the old bucket covers/shroud bands - Do
what is known as a Fox Hole cover repair (this is done to increase
the active tenon height)- Install new covers/shroud bands- Peen
tenons - Machine new bucket covers/shroud bands back to O.E.M
specifications
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairBucket/Blade Tenon Weld RepairDuring a forced outage or,
regular scheduled outage, a customer may have problems with their
seal strips cutting into the blade shroud bands/covers, lifted
shroud bands/covers or, simply erosion to the tenons due to poor
steam quality. We can perform the following repairs:- We can remove
the old shroud bands/covers- Prepare the tenons for welding - Weld
tenons using 410SS filler material- Stress relieve tenons- Grind
tenons back to original configuration- Make new fox hole shroud
bands/covers- Peen and finish machine.
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairTie Wire & Tie Wire Hole RepairsTie wires are used on
General Electric style turbines or manufacturers that follow
General Electric design. At times when a unit is overhauled ,
cracks are found in the tie wire or the tie wire hole in the blade.
These can be repaired during the overhaul. The normal repairs
consist of:
- Replacing the tie wire- Installing a sleeve over the crack in
the tie wire- Weld repairing the bucket/blade tie wire hole
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
Repair Cracked Tie Wire
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairLashing Lug RepairsLashing lugs are normally found on
Westinghouse turbines or other manufacturers that follow
Westinghouse designs. Its typical during an overhaul to find cracks
in the Lashing Lugs. The Lashing Lugs are what connect individual
blades into blade groupings on the last couple of stages on the LP
rotor.
The crack indications are normally ground out, N.D.E. is done to
the Lashing Lug to insure that all of the crack indications have
been removed , then the Lashing Lug is re-welded and x-rayed.
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairErosion Shield Replacement
Erosion shields are normally located on the last couple of
stages on the LP rotor. They are a hardened stellite strip that is
installed to help protect the leading edge of the blades. After
years of operation, missing erosion shields, excessive wear, crack
indications, or loose bonds may make it necessary to replace the
shields. These can be replaced very easily in the field by :
- Removing the old erosion shield- Repairing the blade platform-
Fitting a new erosion shield on attaching it using silver soldier-
Erosion shield is then ultrasonic tested to insure that they are
bonded properly.
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairRemove Erosion Shields
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairClean Blade Platform
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairSilver Solder New Erosion Shield
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairAfter Final Polishing
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairSeal Replacement - Turbine Rotor
Replacement of the seals on the turbine rotor is very common
during an overhaul, especially on Westinghouse steam turbines. We
can:
- Remove the old seal- Clean and inspect groove- Install new
seal - Finish machine the seal back to original design
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairTurbine Rotor MachiningVarious machining operations can be
performed to turbine rotors. A few examples would be machining
of:
-Bearing Journals-Re-Machining of Steam Seal Areas (either
high/low teeth or straight shaft seal areas)-Machining of Inner
Stage Areas-Machining of Shroud Bands/Covers-Machining of
Replacement Seals
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
Repair
LP Rotor Repair - Removal Of Last Stage Blades
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
Repair
LP Rotor Repair - View Of Dovetail Before New Blades Are
Install
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairLP Rotor Repairs Installing New L-0 Row Of Blades
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairLP Rotor Repairs Some Blades Require Machining Before
Installing Blade Into Wheel
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairLP Rotor Repair - Ream L-0 23 Blades
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairLP Rotor Repairs - Tenons are peened after the shroud bands
have been fitted.
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairLP Rotor Repairs - LP Rotor Machining
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesRotor
RepairLow Speed Balancing
Low speed balancing can be provide by STS utilizing a Schenck
H-90T 100 Ton Portable Balancing Machine.
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Superior Turbine Solutions, Inc.
Quality parts provided by STS include:
- Turbine Buckets/Blades- Coupling Bolts- Shroud Bands- Studs-
Pins/Reamers- Nuts- Tie Wires- Erosion Shields- Segmented Packing-
J Strip Seals- Valve Stems- Valve Seats- Valve Disks
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesTurbine
Parts
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Superior Turbine Solutions, Inc.Steam Path CapabilitiesTurbine
Parts
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