Dynamic Characteristics of Tilting Pad Gas Journal Bearing Supported by Rotary Spring

Bearing Dynamic Characteristics of the Ventrassist Rotary Blood Pump

The VentrAssist implantable rotary blood pump, intended for long term ventricular assist, is under development and is currently being tested for its rotor-dynamic stability. A shaftless impeller, which also acts as the rotor of the brushless DC motor, is passively suspended in the pump cavity by hydrodynamic forces. The paper presents experimental investigation of the displacement of the impell...

Dynamic Analysis of a Rotor-Journal Bearing System for Twin Rotary Compressors

A rotor-journal bearing system for a twin rotary compressor has been nlliDerically analyzed to estimate the reliability and to optimize the bearing design. For rotary compressors, large dynamic loads act on the rotor. They are unbalanced forces due to eccentric rotation parts and gas forces induced by the difference in pressure between compression and suction gases. In such a case, the rotor-jo...

A Study of the Thermal Characteristics of the Leading Edge Groove and Conventional Tilting Pad Journal Bearings

Kingsbury, Inc., Philadelphia, PA 19154 In this paper dealing with the tilting pad journal bearing, experim'ental results are presented which show that, at higher shaft speeds, the leading-edge-groove (LEG) design has significantly lower operating temperatures to those of the conventional design of tilting pad journal bearing. Subsequent theoretical analysis has shown that this reduction in pad...

Lateral Dynamics and Stability Analysis of a Gas Compressor Supported by Hybrid and Active Lubricated Multirecess Journal Bearing

Fluid film forces are generated in multirecess journal bearings by two types of lubrication mechanism: the hydrostatic lubrication in the bearing recesses and hydrodynamic lubrication in the bearing lands, when operating in rotation. The combination of both lubrication mechanism leads to hybrid journal bearings (HJB). When part of hydrostatic pressure is also dynamically modified by means of hy...

Dynamic Analysis of Asymmetric Structures Supported by a Sliding Foundation