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Now showing items 51-60 of 60
PNEUMATICALLY ACTUATED CONTROL VALVES IN OIL SYSTEMS: HARDWARE RECOMMENDATIONS AND TUNING CONSIDERATIONS
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
Well designed and properly commissioned auxiliary systems are crucial to the reliability of rotating equipment. This paper addresses the upfront hardware selection and commissioning of pneumatically actuated control valves ...
Self excited torsional vibration in single shaft combined cycle turbine-generator train
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
This case history describes the investigation of the source of unstable behavior of a newly commissioned single-shaft, combined cycle, power generator unit. The source was found to be nonlinear operation of the flexible ...
How to detect Electrostatic discharge (ESD) using proximity probes on rotating machines
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
In this session, a brief introduction about electrostatic discharge phenomena will be done. Then three historical cases with Electrostatic Discharge (ESD) issue will be analyzed in order to explain how to detect Electrostatic ...
A New Approach to Large Motor Driven Pump Trains
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
Sometimes when tasked with an effort that has been done many times before, the same path is followed over an over again. Sometimes the saying “Just because we have always done it that way, doesn’t mean it’s right” is very ...
MEASURED LEAKAGE AND ROTORDYNAMIC-COEFFICIENTS FOR THE FOLLOWING LIQUID ANNULAR SEALS: (A) SMOOTH-ROTOR/GROOVED-STATOR, AND (B) GROOVED-ROTOR/SMOOTH-STATOR
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
Test results are presented and compared for the following annular pump seal geometries: (a) a smooth-rotor/circumferentially-grooved stator (SR/GS) and (b) a smooth-stator/circumferentially-grooved rotor (GR/SS). The GR/SS ...
Performance of additive manufactured hydrodynamic tilting pad bearings with internal pad cooling
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
The demand for higher power densities in gear-type compressors is pushing the loading of its already highly loaded pinions to even higher levels. The typically applied tilting-pad bearings are exposed to high circumferential ...
SUB-SYNCHRONOUS TORSIONAL INTERACTION (SSTI) CASE STUDY: GENERAL APPROACH APPLIED TO A REAL LNG PLANT
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
Scope of this Case Study is to apply a general approach used for Sub-Synchronous Torsional Interaction (SSTI) studies to a real Liquefied Natural Gas (LNG) plant, where severe SSTI events have been observed during commissioning ...
Vertical Pump Resonance, Finite Element Modeling, and Purchase Specifications
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
When natural frequencies are well separated from machine generated vibration/forcing frequencies there is little amplification, but when not well separated significant vibration amplification can occur due to resonance. ...
Analyzing and Resolving an ID Fan Failure Due to Torsional Vibration
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
In order to better control speed of the electric motor-driven ID Fan, the existing fluid coupling was replaced with avariable speed drive, but this led to two failures of the motor shaft and coupling. The drivetrain was ...
Carbon Ring Seal Failure in a High Pressure CO₂ Compressor
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2020)
During commissioning of a new 8-stage CO₂ pipeline compressor, higher than expected seal vent flows were detected from the carbon ring seals in the high pressure (HP) stages. The problem was severe enough that the machine ...