Archives

High Speed Balance Article

Hear from our high-speed balancing expert, Keith Collins, in this article in Power Magazine’s November issue. High-speed turbine rotor balancing was once rare because of the costs and logistical challenges involved in doing it during an outage. That’s begun to change as economic options emerge, and experience is showing that high-speed balancing can pay big […]

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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 […]

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Efficiency Steam Path Audits

Fleet managers are pushing for more economical unit operation, driven by the goal of longer intervals between planned turbine outages. Achieving that goal often hinges on analyzing damage, determining failure mechanisms, correcting root causes, and choosing appropriate maintenance and operation actions to keep the asset online longer. A steam path audit can help ensure reliable […]

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100th High-Speed Balance

Mechanical Dynamics and Analysis is proud to announce its 100th rotor balance in our High-Speed Balance Facility. Our High-Speed Balance Facility became operational in 2013 and is one of the most modern balance facilities for power turbines in the United States. MD&A’s facility was designed with both vacuum capability and the ability to excite generator […]

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Triplet Type Main Stop Valve Upgrade

The MD&A Parts Division Triplet Type Main Stop Valve upgrade reduces solid particle erosion (SPE), thereby increasing valve component life! View the video on the advantages of the main stop valve upgrade and for additional information call MD&A Parts Division today at (518) 885-3199 or use our Contact form. Solid Particle Erosion (SPE) occurs where steam […]

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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 […]

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Turbine Blade Replacement

Mechanical Dynamics and Analysis inspected and repaired a double flow low pressure (DFLP) rotor and inner cylinder after a generator motoring incident. Our experts removed and replaced six rows of rotating blades along with machining the horizontal joints of both halves and certain bores of the inner cylinder to enable the unit to return to […]

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7FH2 Gas Turbine Generator Repair

Mechanical Dynamics and Analysis was contracted to remove a combined cycle site’s old 234MVA 7FH2 gas turbine generator field, along with supplying and installing a new 7FH2 gas generator field. MD&A performed this turnaround in a few weeks. Our reputation for accuracy and reliability in power plant services has spanned over 30 years. Our technical […]

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Steam Turbine Rotor Repairs

Mechanical Dynamics and Analysis inspected and repaired a 20 MW industrial rotor. The unit was a 15 stage single condensing design. MD&A’s experts successfully designed and modified the N-1 packing area, and removed the stage 3 and 4 wheels. Power plant owners face a major challenge of keeping aging turbines up and running — efficiently […]

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Topless Turbine Laser Alignment

Mechanical Dynamics and Analysis’ Topless Turbine Laser Alignment ® Service eliminates the time consuming and expensive process of reassembling a steam turbine for “Tops-On” alignment measurements, saving hundreds of man-hours labor per turbine section. Most centerline alignment activities are moved off the critical path, reducing outage duration by days. Why Align? Correct bearing loading, reducing […]

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