YIN Ming-hu, CHEN Guo-ding, GAO Dang-cheng, ZHANG Guo-yuan. Effects of Load Direction on Performance of Tiliting Pad Journal Bearings[J]. International Journal of Plant Engineering and Management, 2014, 19(2): 100-109

Effects of Load Direction on Performance of Tiliting Pad Journal Bearings
YIN Ming-hu1
1. School of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072,P.R. China;
2. School of Mechano-Electronic Engineering,Xidian University,Xi'an 710071,P.R
At the previous works for tilting journal pad bearings(TPJBs),most TPJBs are designed to operate with the load either directly on-pad(LOP) or directly between-pad(LBP). However,in practice,in some cases,the load direction can change dramatically in operation. With the current requirements for the analysis of dynamic characteristics of the rotor-bearing systems,the effects of the load direction on the bearing performance must be known. So,in this paper,the effects of load direction on the static and dynamic characteristics of TPJBs are obtained with theoretical analysis based on the hydrodynamic lubrication theory,and the influence of load direction on the performance of TPJBs in different structure and operating parameters is also analysed. The results show that the load direction has considerable effects on the static and dynamic characteristics of the TPJBs,especially for the TPJBs that are operating under heavy load and high rotor speed. And for the operating condition that load direction changed rapidly,TPJBs with more pads,smaller length to diameter ratio,larger clearance ratio and smaller perload ratio can reduce the performance fluctuation with the variation of load direction.
Key words:    bearing    journal bearing    tilting pad bearing    hydrodynamic lubrication   
Received: 2014-03-28     Revised:
DOI: 10.13434/j.cnki.1007-4546.2014.0206
Corresponding author:     Email:
Author description:
PDF(1650KB) Free

[1] Zhang Z M,Zhang Y Y. Hydrodynamic lubri-cation theory of journal bearings[M]. Higher Education Press (in Chinese)
[2] Lund J W. Spring and damping coefficients for the tilting pad journal bearing [J]. Trans ASME, 1964, (7):342-352
[3] Ettles C M M. The analysis and performance of pivoted pad journal bearings considering thermal and elastic effects[J]. ASME Journal of Tribol-ogy, 1980, 102(4):182-192
[4] Brockwell K,Kl einbub D,Dmochowski W.Measurement and Calculation of the Dynamic Operating Characteristics of the Five Shoes Tilting Pad Journal Bearing[J]. Tribo Trans,1990, 33:481-492
[5] XU H,Jiang G D,Cong H. Experimental in-vestigation on the dynamic properties of tilting pad journal bearing[J]. Tribology,2001, 21(5):385-389 (in Chinese)
[6] Dmochowski W. Dynamic properties of tilt-ing-pad journal bearings: experimental and theoretical investigation of frequency effects due to pivot flexibility[J]. Journal of Engi-neering for Gas Turbines and Power,ASME,2007, 129:79-84
[7] Hiroo1 T,Masato1 T. Effects of load direc-tion on the static and dynamic characteristics of tilting-pad journal bearings[J]. Nihon Ki-kai Gakkai Ronbunshu C,2011, 77:3480-3489
[8] Arab S A,Brito F P. An experimental study of the influence of loading direction on the thermohydrodynamic behaviour of twin axial groove journal bearing[J]. Proceedings of the Institution of Mechanical Engineers,Part J:Journal of Engineering Tribology,2011, 225:245-365
[9] Simmons J E L, Dixon S J. Effect of load direc-tion, preload,clearance ratio,and oil flow on the performance of a 200 mm journal pad bear-ing[J]. Tribology Transactions,2008, 37(2):227-236
[10] Brechting R, Prior R. Load direction effects on measured static an dynamic operating character-istics of tilting pad journal bearings[J]. Aus-tralian Journal of Mechanical Engineering,2005, 2(2):143-150
Similar articles:
1.GAO Dang-cheng, YIN Ming-hu, CHEN Guo-ding.The Prediction of Dynamic Coefficients for Tilting-Pad Journal Bearings Based on an AGA-BP Neural Network[J]. International Journal of Plant Engineering and Management, 2014,19(1): 39-45