Rotating Component Repair Services

MD&A has been providing engineering and repair services for owners of heavy rotating equipment for over 16 years. Our offerings include a complete array of rotor repair services, backed by the experience of factory-trained engineers. Most repairs on rotors up to 100 tons can be performed on-site, anywhere in the world or in one of our shops. MD&A maintains a vast inventory of portable lathes and other field machining equipment dedicated to address the repair of turbine rotors.

An abbreviated list of MD&A's rotating component services includes:

• Rotor surface cleaning using 220 grit aluminum oxide bead
• Thorough visually inspections by factory-trained steampath engineers or specialists
• Full NDE of rotor surfaces, peripherals and bores were applicable using magnetic particle, liquid penetrant, ultrasonic, eddy current and boresonic inspections
• Sonic testing of finger buckets, dovetail pins and wheel dovetails
• Wheelsonic testing of shrunk-on and integral turbine wheels
• Removal and replacement of bore plugs
• Dimensional checks, including run out checks on couplings, journals and mid-span areas of rotors
• Structural and efficiency steampath audits
• Reverse engineering of rotors for uprate/upgrade projects
• Dovetail machining/enhanced geometry
• Journal refinishing, coupling face grinding and machining to remove out-of-roundness and scoring
• In-place journal machining
• Thrust runner face refinishing to remove run out
• Packing and oil deflector machining
• Shaft metallizing of water impeller fits & restoration
• Line boring of coupling bolt holes
• Restoration of the rabbet fit
• Failure analysis and second opinions on repair recommendations
• Analyze and re-machine bowed rotors
• Provide installation of Hitachi CCB long buckets
• Reverse engineer, supply and install new pine-tree, finger, tangential entry, axial entry blades and buckets
• Erosion shield replacement
• Bucket and blade cover replacement

On Site or In-Shop Low-Speed Balancing

• (8) Machines up to 200 ton capacity
• 2-bearing rotors
• Single journal rotors utilizing a stubshaft
• High speed balance upon request

For more information about MD&A's steampath services please contact our Steampath Engineering Services division at (518) 399-3616 or Blair Woody, Steampath-St. Louis Manager at (314) 880-3000.