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Now showing items 151-160 of 878
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 ...
INFLUENCE OF IMPELLER SUCTION SPECIFIC SPEED ON VIBRATION PERFORMANCE
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2015)
The most commonly used hard limitation for pump suction specific speed is 11,000 (US units). This hard limit grew out of the recommendations from a 1982 reliability study by J.L. Hallam (Hallam 1982). Concomitant testing ...
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 ...