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Jay Eldridge's picture
Jay Eldridge
Vice President Sales & Marketing MD&A
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Bachelor of Science (BS) in Mechanical Engineering with a Mathematics Minor from Union College.  28 years’ experience working in the power generation industry.  Almost 17 of those years were...

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  • Oct 15, 2020 2:15 pm GMTOct 15, 2020 2:17 pm GMT
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Rotor Straightening and High Speed Balance | Energy Central

Mechanical Dynamics and Analysis (MD&A) inspected and repaired an A-10 High Pressure steam turbine rotor. The referenced machine is 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, and high speed balance.

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Source: energycentral.com

This piece was originally shared with the Generation Professionals community group. Thought it would be of interest to share here as well. 

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  • Rotor Straightening and High Speed Balance | Energy Central
  • Rotor Straightening and High Speed Balance
  • Gas Turbine Major and Generator Test & Balance | Energy Central
  • Gas Turbine Major and Generator Test & Balance

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Bob Meinetz on Oct 15, 2020 5:10 pm GMT

Fascinating, Jay. Tremendous accuracy and balance are obviously required to manufacture a massive assembly that spins at 3600 RPM for days or weeks at a time.

What's the weight of a typical rotor? I take it most rotors are reconditioned rather than replaced?

Some engineering porn below (rotor replacement at Diablo Canyon Power Plant ca. 2006):

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