MD&A provides a permanent and economical solution for addressing the potential fretting or cracking of generator rotor slot dovetail surfaces.\u00a0 The inspection and repairs can be conducted either at your plant or in our centrally located Turbine-Generator Repair Facility in St. Louis, Missouri.<\/p>\n
Crack indications located along the wedge loading surfaces are the result of a combination of factors. These include fretting created at the butt-ends of the field wedges, excessive starts \/ stops, and cyclic stresses resulting from rotor \u201cbending\u201d while on turning gear. Negative sequence current events have also been found to aggravate the effects.<\/p>\n
Engineered Repair Alternatives<\/strong> Recommendations for addressing these issues may vary depending on a variety of factors. The objectives of MD&A\u2019s recommendations are:<\/p>\n
\nMD&A provides economic alternatives for addressing issues associated with generator rotor dovetail load surface cracking. MD&A\u2019s methods meet all OEM requirements and include testing of critical regions which may be susceptible to cracking.<\/p>\n