Rexroth® Hydraulic Actuator

MD&A Bearings, Seals & Hydraulics Division (MD&A) recently rebuilt a Rexroth® hydraulic actuator in less than 5 days which included providing new disc springs, servo, poppet valve and shaft. This level of service saved the owner weeks of forced outage downtime and revenue loss. During operation the owner observed erratic valve response and hydraulic fluid […]

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A-10 Rotor Straightening & High Speed Balance

Mechanical Dynamics and Analysis inspected and repaired an A-10 frame High Pressure rotor.   The unit was a 3600 rpm, 90 MW combined cycle unit.  MD&A’s Turbine-Generator Repair Facility performed the incoming inspections / evaluations, repair straightening of the rotor, final inspections, as well as high speed balance. Incoming inspections and evaluation consisted of blast cleaning, […]

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Tour of our new High Speed Balance facility!

Take a tour of our new High Speed Balance facility! Mechanical Dynamics & Analysis (MD&A) High Speed Balance Facility is one of the most modern balance facilities for power turbines in the United States.  It services rotors for generators, steam turbines, gas turbines, large motors, and boiler feed pump turbines.

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Welcome

Welcome to Mechanical Dynamics and Analysis’ (MD&A) Resource Center! MD&A is one of the largest turbine-generator repair & turbine engineering organizations in the United States. We provide complete project management, overhaul and reconditioning of heavy rotating equipment worldwide. Our turbine engineering service teams of project managers, technical directors, shop personnel and consulting turbine-generator engineers are […]

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HPU Pump Motors Are Continuously Running

PROBLEM DEFINITIONThe Hydraulic Power Unit (HPU) pump motors are continuously running at excessive current levels. DETAILMany Hydraulic Power Unit (HPU) pump motors have been observed to be running with excessive current while the turbine is at steady state operating conditions. This condition may also be accompanied by an inability to hold normal operating pressure of […]

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