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Fundamentals of Fluid Film Thrust Bearing Operation and Modeling
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Widely used in turbomachinery, the fluid film thrust bearing is critical to the overall reliability of a machine. Their design complexity and application severity continue to increase, making it challenging for the plant ...
Rotor-Bearing Dynamics of Integrally Geared Turbomachinery
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
This tutorial focuses on the rotordynamic characteristics of
integrally geared compressors and expanders. Although the
focus is for turbomachinery the topics discussed also apply to
industrial gearing. The topics covered ...
Investigation of unexpected Trips in Steam Turbine
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
A 56 MW steam turbine tripped several times over a short period of time
although the trip signal was not sent. A thorough examination of the turbine at site ruled out any problems with the trip system. The pressure data ...
Molten Urea Transfer Pump Seal Failures
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Urea melt pumps had been a reliability concern since commissioning (1992).
Majority of the concerns were related to the failure of mechanical seal.
Unexpected failures of seal were encountered during plant startups or ...
Benefits of Installing Restrictive Orifice Plates on the Suction of Reciprocating Pumps: 1D Pulsation and CFD Studies
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
It is well understood that static pressure at the inlet of reciprocating pumps, quantified typically by Net Positive Suction
Head Available (NPSHA), must be sufficient to avoid cavitation in the pump suction manifold and ...
Operating Conditions of Floating Ring Annular Seals
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Floating ring annular seals are used when large radial rotor displacements must be accommodated. They belong to a larger family of sealing devices that includes face seals and segmented seals. They all use carbon rings and ...
Novel Fiber Optic Technology Monitors In-Slot Vibration and Hot Spots in an Air-Cooled Gas Generator
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Gas-fired and air-cooled generators are subjected to continuous start-stop-load cycles related to thermal/mechanical stresses, and continuous vibration. The machines are designed to run at highly efficient material use and ...
Natural Frequency Whirl Instability in an Industrial Gas Turbine
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
Following failure and in-situ replacement of Bearing 1 on a two-shaft 70 MW industrial gas turbine, excessive vibration was observed on Bearing 2 a few months later.
This case study describes the vibration symptoms and ...
Turbine Basic Knowledge of Steam Turbine Short Course, ST?101/201 Combined
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
It is shown as the outline in this short course that the role of steam turbine, history,
classification, basic structure, components and their function, manufacturing and design
process and control system. And also, the ...
Effective Procedure for Turbomachinery Field Balance
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2018)
When unbalance induced vibrations exceed allowable limits, a more accurate system balance is
required. If performed at site on assembled machines, it is commonly called field balance.
Key point of the activity is the ...