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Torsional Instability Of Cooling Tower Fan During Induction Motor Startup
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Torsional instability during starting of an induction motor has caused excessive torque oscillation and eventual failure of gearbox pinion teeth of a cooling tower fan train. A torsional instability appeared due to a steep ...
Double Flow Refrigeration Compressor Inlet Piping Design and Analysis
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Objective: • Design an inlet piping system for a double flow centrifugal compressor that effectively utilizes existing site spacing constraints: • Distributes flow to each inlet evenly with minimal pressure loss and without ...
Why Proper Low Pass Filter Settings on Crosshead Vibration Signals are Crucial to Minimize Risk of Missed Detects
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Crosshead guide acceleration measurements have gained mainstream acceptance by operators of API 618 recips and now joins frame velocity as a recommended shutdown parameter in the 5th edition of the API 670 Machinery ...
New Control Method For Fixed Speed Compressors With Side Stream
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Problem statement: Operability issues were experienced on flash gas back-to-back compressors with lower molecular weight side stream, driven by fixed speed electric motor: • Failed attempts of start-up/loading • During ...
Investigation of Steam Turbine blade failure
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Blade failure was observed on a backpressure steam turbine (driving a centrifugal compressor) after it was in service for more than one year. This paper presents details of observations, inspections carried out and root ...
Investigation of process gass compressor shaft vibration phenomena
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
This paper presents details of investigation results of issues observed during plant start-up on a centrifugal compressor. Compressor was operated with air/ nitrogen during start-up and high shaft vibration (approx. 75 um) ...
Redesign of Centrifugal Compressor Impeller by means of Scalloping
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
Impellers of centrifugal compressors may experience resonance with vane passing frequencies, especially when operated away from the design conditions. Resonance can cause a serious structural damage to impeller. Complete ...
Asynchronous Motor - Failure of Rotor Lamination Teeth
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
During full load testing of moto-compressor, abnormal vibration were detected. Failure was observed on electrical motor rotor lamination teeth. Deep experimental analysis and metallurgical investigations revealed a high ...
Improving Reliability and Reducing Steam Leakage in General Purpose Steam Turbines with Floating Brush Seals
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
This case study examines four different applications where brush seals were introduced into the gland boxes of process steam turbines where conventional carbon rings and mechanical seals were previously applied. The resulting ...
Integral Gear Compressor Gearbox Flooding Issue
(Turbomachinery Laboratories, Texas A&M Engineering Experiment Station, 2016)
This case study discusses a series of integral gear compressor trips and machine damage that resulted from a sudden increase in motor power not related to process changes.After testing it was determined that the increase ...