Emergent Generator 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 […]

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Horizontal Mounted Actuator Upgrade for Toshiba® Units

MD&A performs repairs on hydraulic systems on all major turbine makes. We’ve built a solid reputation on governor stand repair, and now are forging an equally well-deserved reputation with actuator repairs.  Our experts designed a horizontal mounted actuator upgrade. At our 100,000-square-foot facility in Euclid, Ohio, we stock a large number of components, everything from MHC governor […]

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Frame 5 Gas Turbine Rotor Repair

Mechanical Dynamics & Analysis (MD&A) repaired a Frame 5 gas turbine rotor at our Gas Turbine Repair Center located in Houston TX.  MD&A replaced 1st and 2nd stage buckets, repaired the seal area on the row 1 turbine wheel, performed compressor blade blending, and machined the thrust collar to accommodate the newer style thrust bearing at […]

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Rexroth® Actuator Rebuild

MD&A’s Bearings, Seals & Hydraulics division provides complete refurbishment of Rexroth® hydraulic actuators for power plants owners. As suggested, be sure to inspect your Rexroth® actuators every five (5) years. We maintain a large inventory of Rexroth® hydraulic servos, solenoids, rebuild kits and disc springs to satisfy short-cycle turnaround requirements. To date, MD&A has inspected […]

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Co-Gen Turbine Controls Retrofit

Mechanical Dynamics & Analysis’ Control Systems Division (MD&A Control Systems) replaced an industrial co-gen turbine’s original mechanical-hydraulic (MHC) controls with an electronic governor, electro-hydraulic trip system and self-contained control valve actuator. The primary drivers for the project were the operator’s desire to increase the long-term maintainability and reliability by replacing the MHC components that had […]

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Welcome Phoenix Turbine customers

MD&A Parts Division is pleased to announce the addition of Gas Turbine Shrouds to its portfolio of manufactured components. Working in conjunction with Phoenix Turbine, MD&A has transferred the required technical information, fixturing, tooling, and personnel to its Marion, Ohio manufacturing plant. From Marion, MD&A will continue to supply shrouds to customers in the power […]

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MD&A 7FH2 Spring Migration Repair

Mechanical Dynamics & Analysis’ (MD&A) experts offer a unique, patented repair process that eliminates the axial migration of slot leaf springs within 7FH2 generator fields.  This repair can also be applied to 324 generator fields. The blockage of the radial ventilation passages results in reduced hydrogen gas cooling flow, which can lead to thermal instabilities […]

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Global Multiyear Major Outages

Mechanical Dynamics & Analysis (MD&A) recently performed multiyear outages for a customer on several different units in Colombia. First unit:  This was a major outage and generator test & inspection. In addition, this unit was retrofitted with a new rotor, bearings, and steam path components that required machining, including installing and fitting new nozzles. MD&A […]

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Hydrogen Seal Upgrades

MD&A Bearings, Seals & Hydraulics division stocks a large quantity of hydrogen seals at our Euclid, OH facility, and we can service any size of machine. If we don’t have the seals in stock, our skilled technicians can fabricate them using material we have in the shop. When a customer orders a set of hydrogen […]

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