fbpx

Coordinated 7FA Hot Gas Path and 7FH2 Generator Inspection and Repair

7fa hot gas path 7fh2 generator repair

Mechanical Dynamics & Analysis (MD&A) completed a carefully coordinated 7FA gas turbine hot gas path inspection, 7FH2 generator inspection and repairs in just 19 days, providing all services, labor, and parts. The customer contracted MD&A to perform the inspection and emergent repairs on a tight schedule. Our industry experts completed the work on time maintaining […]

Read More

Alstom® Generator Pole to Pole Connector Modification

pole to pole connectors

The legacy Alstom® Topair WX/Y23Z and WX/Y21Z generator fleets can experience quality issues with the pole to pole connectors. Specifically, indications of cracking have been found on the braze interface and the pole to pole connectors themselves. This condition has affected the 60Hz 23Z fleet and both the 50Hz and 60Hz 21Z fleets. These issues […]

Read More

Generator Rotor Slot Tooth Weld Repair

Generator Rotor Slot Tooth Weld Repair

Mechanical Dynamics & Analysis (MD&A) experts recently performed a Generator Rotor Slot Tooth Weld Repair. Initially, the generator rotor suffered a double ground fault incident that tripped the unit offline. The customer contacted MD&A to perform disassembly, testing, and evaluation of the condition of the unit. Once the generator rotor was removed, visual inspections confirmed melted […]

Read More

Generator Field Support Platform

Generator Field Support Platform

Mechanical Dynamics & Analysis (MD&A) experts have constructed a generator field support platform to allow for removal of the field when performing a 7FH2 Generator Major Inspection. Rotor field inspections can either be performed on-site or in a shop environment.  Repairs generally require the rotor field to be transported to a qualified repair facility.  MD&A […]

Read More

Electric Generators 2018 Annual Review

Electric Generators

Read Electric GENERATORS 2018 Annual Review, a special report by CCJ.  It is complied from presentations made at the third GUG (Generator Users Group) conference from last August.  Electric Generators Review (PDF) MD&A is an exclusive sponsor and can meet all your generator needs! See you at 2018 GUG conference where our experts are presenting again! […]

Read More

Emergent Generator Re-wedge

re-wedge

Mechanical Dynamics & Analysis (MD&A) performed an emergent generator rewedge for a 260 MW Alstom® generator on-site in Mexico. The original work scope involved electrical testing of the generator rotor and stator, along with the removal of the retaining rings to inspect the insulation and blocking under the rings. Upon inspection of the stator, greasing […]

Read More

Expert Repair of Generator High Voltage Bushings

High Voltage Bushings

Insulated devices known as bushings enable an electrical conductor to pass safely through a grounded conducting barrier. Generator bushings are designed to lead current induced in the stator windings through the pressurized, hydrogen-gas tight, earthed generator housing. A typical bushing consists of a conductor surrounded by insulation, except for the terminal ends. As part of […]

Read More

Generator Rotor Stub Shaft Repair

Generator Rotor Stub Shaft Repair

Mechanical Dynamics and Analysis (MD&A) was retained by a utility to perform a stub-shaft repair of a generator rotor collector-end shaft. The customer reported that the generator rotor had suffered a collector ring failure and also a ground to the main shaft. Major arcing and heat damage occurred to the generator rotor forging shaft. The […]

Read More

Casing/ Shell Weld Repairs & Re-Rounding

For many years, the OEM fix for major cracking or shell distortion was replacement of the defective shell, also referred to as casing by some OEMs, with new. Mechanical Dynamics and Analysis has provided an alternative to shell replacements which includes fixing the existing shell to extend its life. MD&A recently welded and repaired the […]

Read More

Mechanical Dynamics & Analysis LLC   |   19 British American Blvd., Latham, NY 12110   |   P (518) 399-3616   |   F (518) 399-3929