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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 ...
Low lift Dry Gas Seals in High Vapor Pressure, Flashing Hydrocarbon Pump Applications
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2015)
Problem: Ethane pumps with process lubricated; ‘liquid (wet)’ 2CW-CS, plan 11, 76, seals suffered a high frequency of seal failures from initial commissioning in November 2009
•2 fractionator units each with 2 ethane ...
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 ...
Pump Cavitation – Physics, Prediction, Control, Troubleshooting
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2015)
Shaft sealing technology for centrifugal compressors and Turboexpanders: Dry Gas Seal Function, Arrangements, Types and Major Parts and Separation Seals
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2015)
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 ...