{"id":3413,"date":"2016-11-01T14:55:42","date_gmt":"2016-11-01T18:55:42","guid":{"rendered":"https:\/\/www.mdaturbines.com\/?post_type=experts&#038;p=3413"},"modified":"2022-04-28T08:52:12","modified_gmt":"2022-04-28T12:52:12","slug":"robert-kilroy","status":"publish","type":"experts","link":"https:\/\/www.mdaturbines.com\/es\/resources\/experts\/robert-kilroy\/","title":{"rendered":"Robert Kilroy"},"content":{"rendered":"<h2><img decoding=\"async\" class=\"alignleft size-medium wp-image-3412\" src=\"https:\/\/www.mdaturbines.com\/wp-content\/uploads\/2016\/11\/IMG_0288_RobK-300x200.jpg\" alt=\"img_0288_robk\" width=\"300\" height=\"200\" srcset=\"https:\/\/www.mdaturbines.com\/wp-content\/uploads\/2016\/11\/IMG_0288_RobK-300x200.jpg 300w, https:\/\/www.mdaturbines.com\/wp-content\/uploads\/2016\/11\/IMG_0288_RobK-768x512.jpg 768w, https:\/\/www.mdaturbines.com\/wp-content\/uploads\/2016\/11\/IMG_0288_RobK-1024x683.jpg 1024w, https:\/\/www.mdaturbines.com\/wp-content\/uploads\/2016\/11\/IMG_0288_RobK-240x160.jpg 240w, https:\/\/www.mdaturbines.com\/wp-content\/uploads\/2016\/11\/IMG_0288_RobK-90x60.jpg 90w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>Background<\/h2>\n<p>I graduated from the Massachusetts Maritime Academy with a Bachelor degree in Engineering and started my career as a design engineer for General Electric\u00ae.\u00a0 I then moved onto ALSTOM Power\u00ae as a repairs engineer, servicing and repairing ALSTOM and other OEM power generation equipment. Since 2007 I have been working for MD&amp;A as a Senior Turbine Generator Repairs Engineer and have over 26 years of experience in the maintenance, service, and repair of steam turbine and generator equipment for all major OEM designs.<\/p>\n<h2>What do you do here at MD&amp;A?<\/h2>\n<p>As a Senior Turbine Generator Repairs Engineer at MD&amp;A, my job is twofold. I support <a href=\"https:\/\/www.mdaturbines.com\/repairs\/turbine-repair\/\">steam turbine<\/a>, <a href=\"https:\/\/www.mdaturbines.com\/repairs\/large-generator-repair\/\">generator<\/a>, and <a href=\"https:\/\/www.mdaturbines.com\/repairs\/steam-turbine-components\/high-pressure-valve-repair\/\">valve repairs<\/a> both at customer sites, as well as, in the MD&amp;A St. Louis Repair shop. And, I provide on-site third-party <a href=\"https:\/\/www.mdaturbines.com\/services\/steam-turbine\/turbine-engineering\/\">technical engineering consulting support<\/a> for customers during major equipment outage overhauls and component repairs.<\/p>\n<h2>What is the most interesting challenge you have come across at a job site or in repair shop?<\/h2>\n<p>I developed a weld repair for a condemned generator rotor forging that was damaged by a double ground fault incident. What we found was that the rotor forging had some missing material and some that had hardened to a coil slot tooth. Both problems were due to severe arcing damage. I was part of a team that developed a plan to remove part of the coil slot tooth, perform a weld restore procedure, conduct a post-weld heat treatment, and complete final machine work on the generator rotor tooth. <a href=\"https:\/\/www.mdaturbines.com\/repairs\/machining-services\/machining-services\/\">Precise welding and heat treatment<\/a> were important to ensure that the generator rotor suffered no distortion. Equally critical, the final machining had to be performed to make sure the newly machined surfaces blended with pre-existing surfaces, which included the tooth sidewalls, dovetail hooks, and cooling vent slot. Our plan resulted in the generator rotor forging being repaired successfully. It was a good feeling to know that the customer was very grateful to learn they would not have to procure a new generator rotor forging, and that the <a href=\"https:\/\/www.mdaturbines.com\/repairs\/large-generator-repair\/\">generator rotor<\/a> was able to return to service without issues.<\/p>\n<h2>What are the signs of a bowed rotor?<\/h2>\n<p>A rotor bow can be caused either by long-term thermal yielding or by a quick thermal incident. The first can happen on high-temperature rotor elements and is more often seen in long rotor spans. The signs of a bowed rotor caused by long-term thermal yielding are a long-term trend of high vibration at operating speed due to a gradual increase in rotor runout over time. It\u2019s important to note that vibration due to runout can be masked by balance shots and should be checked when evaluating a rotor\u2019s overall condition. By contrast, a rotor bow due to a quick thermal incident can occur on high- and low-temperature rotor elements either because of a water induction incident or by the heat that is generated by a hard rub that affects stationary components. In this case, the signs of a bowed rotor can include rubbing or locking of the rotor rotation on turning gear, excessively high vibrations at critical speeds, and high vibrations at operating speeds. At the extreme, a unit could even trip offline due to the high vibration. Fortunately, even severely <a href=\"https:\/\/www.mdaturbines.com\/repairs\/turbine-repair\/rotor-straightening\/\">bowed rotors<\/a> can be repaired using options that can include machining, stress relieving, and thermal \u201chot spot\u201d straightening methods.<\/p>\n<h2>Diaphragm Dishing is the axial distortion of a diaphragm, which roughly resembles the shape of a dish. How does dishing impact fossil-fired machines that have been re-purposed for combined cycle operation?<\/h2>\n<p>A diaphragm that is dished, or that shows signs of displacement of the inner web, can be caused either by long-term high- temperature creep or by a water hammer \/ steam flashing incident. Fossil machines that are seeing duty in combined-cycle operation that has been re-purposed for combined cycle operation may also experience an increase in diaphragm dishing due to increased start \/ stop cycles. For example, if stage operating temperatures, steam mass flow, or pressure drops have risen across the diaphragm from the original design intent of each stage, then <a href=\"https:\/\/www.mdaturbines.com\/repairs\/turbine-repair\/stationary-component-repair-2\/\">diaphragm dishing<\/a> due to high-temperature creep may become an issue. To minimize high-temperature creep, it\u2019s important to review and evaluate how the turbine is being re-purposed, or reduce the inlet temperatures and steam mass flow. If an increase in incidents of water induction or drain blockage occurs due to the increased number of start \/ stop cycles, then diaphragm dishing due to water hammer or steam flashing may be an issue. To avoid this possibility, be sure to follow startup \/ shut down procedures and to perform regular maintenance on all <a href=\"https:\/\/www.mdaturbines.com\/repairs\/steam-turbine-components\/high-pressure-valve-repair\/\">valves<\/a>. Fortunately, dished diaphragms can be repaired or modified to increase their stiffness, or materials can be replaced to improve creep resistance.<\/p>\n<h2>What is your personal motto?<\/h2>\n<p>My personal motto\u2026 there are so many to choose from: \u201cAttention to Detail\u201d, \u201cThe Right Tool for the Right Job\u201d, \u201cMeasure, Check, Verify, Re-Check\u201d. We work on high energy equipment, spinning at high speeds, with very tight tolerances and clearances, in an industry that is not very forgiving. Success in any endeavor requires single-minded attention to detail and total concentration.<\/p>\n<p><strong>Contact Rob\u00a0today using<\/strong><strong> our <a href=\"https:\/\/www.mdaturbines.com\/contact\/\">Contact form<\/a>.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I graduated from the Massachusetts Maritime Academy with a Bachelor degree in Engineering and started my career at General Electric\u00ae.  I then moved onto ALSTOM Power\u00ae.  Since 2007 I have been working for MD&#038;A as a Senior Turbine Generator Repairs Engineer and have over 26 years of experience in the maintenance, service, and repair of steam turbine and generator equipment.<\/p>\n","protected":false},"author":2,"featured_media":3411,"parent":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"expert_cats":[40],"class_list":["post-3413","experts","type-experts","status-publish","has-post-thumbnail","hentry","expert_cats-repairs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Robert Kilroy &#8211; MDA Turbines<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mdaturbines.com\/es\/resources\/experts\/robert-kilroy\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Robert Kilroy &#8211; MDA Turbines\" \/>\n<meta property=\"og:description\" content=\"I graduated from the Massachusetts Maritime Academy with a Bachelor degree in Engineering and started my career at General Electric\u00ae. 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