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TT11 - Range Versus Efficiency--Striking the Proper Balance
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2019])
The paper addresses the balance between peak attainable efficiency and overall operating range that must be addressed when specifying, designing and/or selecting centrifugal compressors. The relative roles of the various ...
TL06 - Experimental Evaluation of Performance and Mechanical Reliability for High Pressure CO2 Integrally Geared Compressor
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2019])
Comprehensive tests were conducted for the main component as well as the complete machine and experimentally determined not only general performances such as overall aerodynamics and rotor vibrations but also usually unknown ...
TL03 - Numerical Models and Experimental Validation of High Speed, High Load, Hydrodynamic Bearings
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2019])
Three test campaigns conducted on high speed, high load, chromium-copper bearings are presented. The first bearing is a fixed-geometry, externally cooled pressure dam journal bearing. The second is a tilting pad journal ...
TL05 - A Resonance Condition Encountered in a Shop Overspeed Machine Due to Inertia Effects--The Theoretical Basis and Practical Experience
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2019])
This lecture will discuss the dynamic instability theory and resulting vibration characteristics of a high-speed rotor system when the ratio of the polar moment of inertia and transverse moment of inertia approaches a value ...
TL01 - A Refined Method to Check Tooth Contact Patterns of Gear--Guarantees Factory Quality Tooth Contact, but with Less Effort and Less Risk
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2017])
This paper describes an advanced method to check the tooth contact of a gear unit. To perform the check, only a small wrench and a precision frame spirit level are needed; both are commodity tools. Two reference bars must ...
PL08 - Torsional Rotordynamic Excitation, Natural Frequency and Damping Characteristics in a Viscous Centrifugal Pump Application
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2019])
This lecture is concerned with the torsional vibration characteristics of a double-suction centrifugal pump handling a highly viscous product. This test case serves to verify engineering assumptions about torsional excitation ...
CSP04 - Fault diagnosis of electric motor by analyzing vibration and current spectrum
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2019])
As reliability of electric power system has been significantly improved in recent decades, electric motors are widely used in petroleum and chemical industries because they are rugged and reliable in severe condition. Motor ...
CSP09 - Shop Run Test Failure of an API 610 Vertical Sump Pump: what it exposed, and why it was critical to solve.
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2019])
This case shall discuss incidents of a deficient inspection affected an API610 vertical sump pumps, supplied to operate in a Sulfur Removal Unit (SRU) for a major gas project. One challenge in such failures is the iterative ...
CSP01 - Vertical Pump Resonance Problem
(Turbomachinery Laboratory, Texas A&M Engineering Experiment Station, [2019])
Resonance in rotating machinery occurs when a natural frequency is coincident with the operating speed. The issue can be with the rotor bearing system or the pump supporting structure natural frequencies, but the resulting ...
CST11 - Catastrophic Failure Diagnosis with Modal Analysis of Generator Endwindings
(Turbomachinery LaboratoryTexas A&M Engineering Experiment Station, [2019])
In this paper, the catastrophic failure of a 2-pole 360MW unit will be presented. This failure lead a root cause analysis and a series of investigations that was taken place in a similar design unit deployed at a different ...