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Lubrication Systems For Turbomachinery
(Texas A&M University. Gas Turbine Laboratories, 1978)
A lubrication system for turbomachinery of significant size generally consists of a reservoir, pump, filter, cooler, piping and controls. Experience through the years has indicated design criteria required to minimize ...
Practical Considerations For A Rated Speed Shop Balance
(Texas A&M University. Gas Turbine Laboratories, 1978)
The increasing availability of high speed balancing facilities requires the manufacturer and/or ultimate user to seriously consider a rates speed rotor balance. In addition, the development of the "influence coefficient" ...
Particular Problems Of Steam Turbine Lubrication
(Texas A&M University. Gas Turbine Laboratories, 1978)
The reliability of a steam turboset is dependent, among other things, on correct functioning of its hydraulic lubrication and control system. An essential requirement is a reliable oil supply over the whole operating range. ...
Subsynchronous Vibration In A Large Water Flood Pump
(Texas A&M University. Gas Turbine Laboratories, 1978)
In 1973 Aramco embarked on a large water flood projects for the Ghawar oil reservoir. After approximately 1 year in service three of the 16 X 16 X 20 2-stage DVMF pumps developed a severe shaft vibration of over 20 mils ...
An Investigation Of The Flexural Vibration Behavior Of Slender Rotors In Drum-Type Condensing Turbines
(Texas A&M University. Gas Turbine Laboratories, 1978)
With turbine rotors of low shaft elasticity (large diameter and small bearing span) the increase in amplitude at the first point of shaft resonance in the speed range is generally slight. Consequently no particular attention ...
Compressor Response To Synchronous Motor Startup
(Texas A&M University. Gas Turbine Laboratories, 1978)
Synchronous machines produce an oscillating torque at twice slip frequency on starting. If the shaft system of a coupled compressor is not adequately designed, or if the motor malfunctions, this torsional excitation will ...
Electromagnetic Shaft Currents And Demagnetization On Rotors Of Turbines And Compressors
(Texas A&M University. Gas Turbine Laboratories, 1978)
A high percentage of large, high-speed compressor trains has suffered serious failures which were initiated by shaft current damage. These currents are generated by electromagnetic effects. The basic mechanics of various ...
Using Modified Acoustic Emission Techniques For Machinery Condition Surveillance
(Texas A&M University. Gas Turbine Laboratories, 1978)
Acoustic emission is the release of high frequency sound energy in a material under strain. It is the result of microscopic changes in material structure and is associated with deformation and defect growth. Until about ...
Transient Analyses Of Synchronous Motor Trains
(Texas A&M University. Gas Turbine Laboratories, 1978)
This paper discusses the philosophy of optimum location of torsional critical speeds which will be excited by the transient startup, as well as methods of adjusting the resonant frequencies. Pulsating torque, average torque, ...
The State Of The Art Of High Speed Overhung Centrifugal Compressors For The Process Industry
(Texas A&M University. Gas Turbine Laboratories, 1978)
Advances in 3-D finite element stress analysis, as well as powerful analytical technique in rotor dynamics and bearing analysis using high speed digital computers, have created the environment to build process centrifugal ...