Tilting Pad Journal Bearing Starvation Effects

@inproceedings{Nicholas2008TiltingPJ,
  title={Tilting Pad Journal Bearing Starvation Effects},
  author={John C. Nicholas and Greg Elliott and Thomas P. Shoup and Ed R. Martin},
  year={2008}
}
Improved turbomachinery aerodynamic performance requirements have increased journal bearing operating speeds and loads well above traditionally acceptable values. For example, for high performance gearboxes, pinion bearing surface speed requirements are often over 325 f/s with bearing unit loadings in the 500 psi range. In order to meet the design challenges for these severe applications, evacuated bearing housings have been utilized as an effective means of reducing journal bearing operating… Expand
10 Citations
The Effect Of Starvation On The Dynamic Properties Of Tilting Pad Journal Bearings
A new 46 MW steam turbine became unstable as the load on the turbine was increased. The turbine had a relatively long slender shaft and the subsynchronous frequency was near the first critical speedExpand
Experimental and theoretical investigations on transition of lubrication conditions for a five-pad tilting-pad journal bearing with eccentric pivot up to highest surface speeds
Abstract Lubrication conditions of tilting-pad journal bearings strongly depend on the combination of bearing design, lubricant flow rate, and operating boundary conditions. A five-pad tilting-padExpand
Theoretical and Experimental Investigations on Directly Lubricated Tilting Pad Journal Bearing under Starved Lubrication
Abstract In this study, a comprehensive thermoelastohydrodynamic model considering turbulence and cavitation is developed. After comparing the Reynolds-Rayleigh-Plesset and Elrod and Adams models,Expand
Characterisation of starved hydrodynamic lubricating films
  • C.L. Liu, F. Guo, P.L. Wong
  • Materials Science
  • Tribology International
  • 2019
Abstract Optimisation of lubricant supply to bearings has considerable benefits in terms of energy saving and smooth running. This paper presents a study on the hydrodynamic lubrication of slidingExpand
Improved Estimation of Bearing Pads' Inlet Temperature: A Model for Lubricant Mixing at Oil Feed Ports and Validation against Test Data
Energy efficient operation of fluid film bearings demands savings in delivery flow while also managing to reduce the temperature in the fluid film and bearing pads. To achieve this goal, tilting padExpand

References

SHOWING 1-10 OF 15 REFERENCES
Tilting Pad Journal Bearings With Spray-Bar Blockers And By-Pass Cooling For High Speed, High Load Applications.
With performance considerations driving the design of rotating equipment, operating speeds and journal loads have increased greatly in recent years, often exceeding generally accepted design limits.Expand
Static Performance Characteristics and Rotordynamic Coefficients for a Four-Pad Ball-in-Socket Tilting Pad Journal Bearing
Static performance characteristics and rotordynamic coefficients were experimentally determined for a four-pad, spherical-seat, tilting-pad journal bearing in load-between-pad configuration. MeasuredExpand
Static Performance Characteristics and Rotordynamic Coefficients for a Four-Pad Ball-in-Socket Tilting Pad Journal Bearing
Static performance characteristics and rotordynamic coefficients were experimentally determined for a four-pad, ball-in-socket, tilting-pad journal bearing in load-between-pad configuration. MeasuredExpand
Tilting Pad Bearing Design.
The basics of tilting pad bearing design are discussed to include limits of operation for load, speed, and metal tempera­ ture. Optimum temperature sensor locations are recommended for self aligningExpand
Tilting Pad Journal Bearing Pivot Design For High Load Applications.
Reducing pivot stress, pivot wear and preventing pivot failure are major design challenges encountered by tilting pad bearing 33 designers in the extremely high load regime where the bearing unitExpand
Analysis of Squeeze Film Dampers Operating With Bubbly Lubricants
Rotor-bearing systems supported on squeeze film dampers (SFDs) show large amplitude vibratory motions when traversing critical speeds. At these operating conditions air is drawn into the damper thinExpand
Stiffness and Damping Coefficients for the Five-Pad Tilting-Pad Bearing
Stiffness and damping coefficients are presented for the 5-pad tilt-pad bearing for various preloads, offsets, length to diameter ratios and pad loadings (on and between pad). Finite elements and theExpand
Special-Purpose Gear Units for Petroleum, Chemical and Gas Industry Services Fifth Edition
  • API Standard
  • 2003
Thermoelastohydrodynamic Analysis of Fluid Film Journal Bearings
  • Thermoelastohydrodynamic Analysis of Fluid Film Journal Bearings
  • 2003
...
1
2
...