Petrochemical plants are confronted with an increasing number of available mechanical seal designs. The user must choose from among inexpensive standard seals and exotic, high engineered seal models. We have seen seal costs ...

This case history describes the investigation of the source of unstable behavior of a newly commissioned single-shaft, combined cycle, power generator unit. The source was found to be nonlinear operation of the flexible ...

Vibration of a journal within a fluid film bearing produces a dynamic load on the babbitted bearing surfaces. A rational vibration criterion can be based on a consistent magnitude of this dynamic load among widely different ...

Proper alignment of rotating equipment has long been recognized as a prerequisite to safe, reliable operation. Achieving proper alignment, however, involves much more than merely adjusting the machines so that the shafts ...

For proper sizing of pump shafts, many criteria need to be considered such as stress, deformation, and rotordynamics. The authors try to shed more light on these areas in order to ensure economic, safe, and reliable pump ...

One property of heavily to moderately loaded sleeve bearings is the resulting asymmetric stiffness and damping coefficients. These asymmetric properties often result in split first critical speeds. Since the horizontal ...

The details of shop balancing flexible shaft rotors are discussed with an explanation of the key parameters involved, such as tolerances and specifications, balance procedures, and documentation. Understanding and controlling ...

Understanding the lateral rotordynamic behavior is critical in determining the reliability/operability of rotating equipment. Whether examining a centrifugal pump or compressor, steam or gas turbine, motor or generator, ...