An Approach Searching for the Steady-State Equilibrium Position of Tilting-Pad Journal Bearing for Supporting Motorized Spindle

2012 ◽  
Vol 9 (10) ◽  
pp. 1710-1714 ◽  
Author(s):  
Shenbo Yu ◽  
Shibin Chen
Keyword(s):  
Steady State ◽  
Equilibrium Position ◽  
Journal Bearing ◽  
Motorized Spindle ◽  
State Equilibrium ◽  
Tilting Pad ◽  
Tilting Pad Journal Bearing

The Steady-State and Dynamic Characteristics of the Tilting-Pad Journal Bearing in Laminar and Turbulent Flow Regimes

1967 ◽  
Vol 89 (3) ◽  
pp. 392-400 ◽  
Author(s):  
F. K. Orcutt
Keyword(s):  
Steady State ◽  
Turbulent Flow ◽  
Dynamic Characteristics ◽  
Journal Bearing ◽  
Calculated Data ◽  
Operating Parameters ◽  
Experimental Measurements ◽  
Tilting Pad ◽  
Laminar And Turbulent Flow ◽  
Tilting Pad Journal Bearing

Calculated steady-state and dynamic characteristics are given for the four-pad, tilting-pad journal bearing with preload coefficients of 0 and 0.5 and for mean Reynolds up to 12,000. The calculated characteristics are compared with experimental measurements over the same range of operating parameters. Correlation is good, leading to the conclusion that the calculated data are effective for design analysis of rotor-bearing systems using tilting-pad bearings.

Stability Considerations for a Gas-Lubricated Tilting Pad Bearing—Part 2: Analytical Refinements and Stability Data

1972 ◽  
Vol 94 (3) ◽  
pp. 223-233 ◽  
Author(s):  
J. T. McCabe ◽  
T. Y. Chu ◽  
H. G. Elrod
Keyword(s):  
Steady State ◽  
Frequency Response ◽  
Journal Bearing ◽  
Design Data ◽  
Tilting Pad ◽  
Stability Data ◽  
Frequency Response Method ◽  
Response Method ◽  
Tilting Pad Journal Bearing ◽  
Bearing Part

A method for generating the film response of a single gas-lubricated tilting pad journal bearing is derived and it is shown how the results can be used to provide both steady-state and stability data for a three pad bearing. The nature of tilting pad bearing stability is discussed with the aid of frequency response plots, mode shape computations and two illustrative limiting cases. In the first, the bearing pivots are locked and the shaft is free to translate; in the second, the rotor is restrained from translating but the pads are free to pitch. Finally, a design example is given and a comparison is made between a three shoe bearing with design data based on the step-jump method and a four shoe bearing with design data based on the frequency response method.

scholarly journals Improvement of Tilting-Pad Journal Bearing Operating Characteristics by Application of Eddy Grooves

Lubricants ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 18
Author(s):  
Eckhard Schüler ◽  
Olaf Berner
Keyword(s):  
High Speed ◽  
Journal Bearing ◽  
Load Capacity ◽  
Fluid Film ◽  
Operating Characteristics ◽  
Fluid Film Bearings ◽  
Tilting Pad ◽  
Bearing Load ◽  
Bearing Loads ◽  
Tilting Pad Journal Bearing

In high speed, high load fluid-film bearings, the laminar-turbulent flow transition can lead to a considerable reduction of the maximum bearing temperatures, due to a homogenization of the fluid-film temperature in radial direction. Since this phenomenon only occurs significantly in large bearings or at very high sliding speeds, means to achieve the effect at lower speeds have been investigated in the past. This paper shows an experimental investigation of this effect and how it can be used for smaller bearings by optimized eddy grooves, machined into the bearing surface. The investigations were carried out on a Miba journal bearing test rig with Ø120 mm shaft diameter at speeds between 50 m/s–110 m/s and at specific bearing loads up to 4.0 MPa. To investigate the potential of this technology, additional temperature probes were installed at the crucial position directly in the sliding surface of an up-to-date tilting pad journal bearing. The results show that the achieved surface temperature reduction with the optimized eddy grooves is significant and represents a considerable enhancement of bearing load capacity. This increase in performance opens new options for the design of bearings and related turbomachinery applications.

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