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Now showing items 4111-4120 of 4423
Moto-Compressor coupling failure
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
This case study will present the failure of the LS coupling of a variable speed moto compressor, due to a resonance of the first critical torsional speed while running at Minimum Operating Speed. The path followed for the ...
Cracking of the Cooling Water Manifold caused by Fluid Induced Instability of the Thrust Bearing in a Heavy-Duty Gas Turbine
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
This case study presents the RCA of cracks in water cooling manifolds of a 300MW gas turbine. The cause of the failure was a natural frequency of the manifold excited by a self excited rotor axial vibration due to excessive ...
An End User's Guide to Centrifugal Pump Rotordynamics
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
This tutorial outlines the basics of pump rotordynamics in a form that is intended to be Machinery End User friendly. Key concepts will be defined in understandable terms, and analysis and testing options will be presented ...
Site Performance Testing of Centrifugal Compressors and Gas Turbine Drivers
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
While factory performance tests for compressors and gas turbines are well defined in ASME power test codes, and can be performed under well controlled conditions, site performance tests must be performed under the conditions ...
High Vibration of a Centrifugal Compressor Casing Caused by the Gas Leakage across a Damaged Gasket
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
A sudden increase of casing vibration along with loud noise and shaking of casing and process piping were observed on a large sales gas centrifugal compressor, while the rotor vibration was below alarm level. When the unit ...
The Use of Online Condition Monitoring in The Identification of Gas Compressor Rotor Damage
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
Investigation and management of a rotordynamic issue affecting a production-critical centrifugal gas compressor. Following a restart of the compressor after a plant trip, radial vibration at the non-drive end of the shaft ...
A New Bolted Joint Profile, Optimized with FEA, Fixes a Leaking Propane Pump
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
A bolted raised face Joint (with O-ring gasket) was failure prone. An axisymmetric FEA (finite element analysis) of the Joint verified why: the flanges were not stiff enough (not thick enough); too much flange rotation ...
INTRODUCTION TO DRY GAS SEALS AND SYSTEMS
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
This tutorial presents an introduction to dry gas seals (DGSs) and their associated systems. DGSs are used as a shaft end seals for compressors and turbines, and they are installed on virtually all centrifugal compressors ...
Vibration Spike During Start up of an Integrally Geared Compressor
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
During workshop testing of a new 3-stage main air compressor, higher than expected vibration levels were detected at stage 1 and 2 at start up. They are high enough that the machine could not be brought to the full speed. ...
MODERN RISKS OF VARNISH AND DEFLAGRATIONS IN COMPRESSOR AND TURBINE LUBRICATION OIL SYSTEMS
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, 2021)
This presentation looks at a case study of a main air compressor that developed severe varnish ultimately linked to change in modern oil chemistry. It reviews actions that can be taken to minimize oil degradation resulting ...