Browsing by Author "Kocur, John A."
Now showing items 1-16 of 16
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Naldi, Lorenzo; Rotondo, Paola; Kocur, John A. (Texas A&M University. Turbomachinery Laboratories, 2008)
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Kocur, John A.; Muench, Maximilian G. (Texas A&M University. Turbomachinery Laboratories, 2012)The popularity of VFD motors in compressor trains has increased in recent years. Increased process flexibility is a primary consideration for implementation of VFD systems. However, this comes at a cost of increased ...
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Howard, Brian F.; Kocur, John A. (Texas A&M University. Turbomachinery Laboratories, 2009)Condition monitoring data collection capabilities have grown over the last decade in large part due to advances in integrated circuits (IC). These advances now permit real time thermodynamic and process calculations on ...
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Kocur, John A. (Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
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Kocur, John A.; Hayles, George C. (Texas A&M University. Turbomachinery Laboratories, 2004)A catalytic gas process compressor experienced low frequency vibrations in excess of trip levels following installation of a honeycomb balance piston. After 12 years of operation, low seal oil differential forced an unplanned ...
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Corcoran, Joseph P.; Kocur, John A.; Mitsingas, Michael C. (Texas A&M University. Turbomachinery Laboratories, 2010)In the past few years the authors have encountered numerous problems and coupling failures related to unexpected torque fluctuations on applications with reciprocating compressors and on VFD, synchronous motor, and gas ...
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Kocur, John A.; Platt, John P.; Shabi, Larry G. (Texas A&M University. Turbomachinery Laboratories, 1987)There are significant advantages in using gas lubricated face seals (dry gas seals) in centrifugal compressor service. Foremost among these are the elimination of the seal oil system resulting in lower maintenance, increased ...
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Nicholas, John C.; Kocur, John A. (Texas A&M University. Turbomachinery Laboratories, 2005)The American Petroleum Institute (API) has recently implemented new rotordynamic stability specifications for centrifugal compressors. The specifications consist of a Level I analysis that approximates the destabilizing ...
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Kocur, John A.; Cloud, C. Hunter (Texas A&M University. Turbomachinery Laboratories, 2013)Understanding the lateral rotordynamic behavior is critical in determining the reliability/operability of rotating equipment. Whether examining a centrifugal pump or compressor, steam or gas turbine, motor or generator, ...
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Short Course T4 On Lateral Rotordynamics of Petrochemical Equipment - Review, Examples, and Problem Kocur, John A.; Nicholas, John C. (Texas A&M University. Turbomachinery Laboratories, 2011)
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Kocur, John A. (Texas A&M University. Turbomachinery Laboratories, 2012)
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Short Course T7: Lateral Rotordynamics of Petrochemical Equipment - Review, Examples, and Problems Kocur, John A. (Texas A&M University. Turbomachinery Laboratories, 2014)This course is aimed at machinery and project engineers and technicians who need a basic understanding of critical speeds, response to unbalance, and stability of rotating machinery. The course is intended for the layman’s ...
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Allaire, Paul E.; Stroh, Carrol G.; Flack, Ronald D.; Kocur, John A.; Barrett, Lloyd E. (Texas A&M University. Turbomachinery Laboratories, 1987)The investigation of a subsynchronous vibration problem encountered in a six stage centrifugal compressor is discussed. At a running speed of approximately 9000 rpm, a subsynchronous vibration (at 4200 rpm) of nearly two ...
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Nicholas, John C.; Edney, Stephen L.; Kocur, John A.; Hustak, Jerry F. (Texas A&M University. Turbomachinery Laboratories, 1997)The importance of correlating rotordynamic analytical results to actual test data has become extremely important in recent years. Many user specifications require the verification of vendor generated analytical results in ...
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Corcoran, Joseph P.; Kocur, John A. (Texas A&M University. Turbomachinery Laboratories, 2008)High vibration problems including failed coupling parts on a VFD motor driven reciprocating compressor are analyzed and the root causes and solutions are discussed in this costly field issue.
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Corcoran, Joseph P.; Kocur, John A. (Texas A&M University. Turbomachinery Laboratories, 2008)A catastrophic failure of a high performance disc coupling connecting the speed increaser and LP compressor in a VFD controlled 18,300 HP motor/speed increaser/LP compressor/HP compressor train, led to months of reduced ...