Journal bearings are widely used to support the rotor of industrial machinery with high loads, such as steam turbines, centrifugal pump and compressors. The problem of journal bearings can cause catastrophic failures, results in huge economic loss and create high safety risks. It is necessary to develop effective condition monitoring technologies to detect and diagnose the failures at early sta...

Stable operation of axial and centrifugal compressors is limited towards low mass 1ows due to the occurrence of surge. The stable operating region can be enlarged by active control. In this study, we use a control valve which is fully closed in the desired operating point and only opens to stabilize the system around this point. As a result, only nonnegative control values are allowed, which co...

Rotor dynamics plays an important role in many engineering fields such as gas turbine, steam turbine, reciprocating and centrifugal compressors, the spindle of machine tools, and so on. Owing to the growing demands for high power, high speed, and light weight of the rotor-bearing system, computations of critical speeds and steady-state response at synchronous and sub critical resonances become ...

Probabilistic Lifing Leader of GE Oil & Gas, in Bethlehem, Pennsylvania, for all products in the Chief Engineers’Office. He has been involved in the design, development, and analysis of industrial turbomachinery for more than 30 years at Turbodyne Corporation, Dresser Industries, Dresser Rand Company, and, most recently, with Safe Technical Solutions Inc., where he served as Director of Enginee...

This paper presents a method for estimating the potential for liquid droplet erosion in compression system components, such as the impeller of centrifugal compressors. The erosion model selected is used to calculate a threshold velocity that represents the limit for the onset of erosion damage. The parameters used in the model include the liquid phase density and viscosity, impeller geometry, s...

Balance piston seals are subjected to large pressure differential and can generate large forces directly impacting the stability of centrifugal compressors. The most common designs are textured seals such as honeycomb, hole-pattern seals, and pocketed seals including pocket damper seals (PDS) and fully partition damper seals (FPDS), shown in Fig. 1. The dynamic performance of textured seals hav...