establishment of approximate analytical model of oil film force for finite length tilting pad journal bearings
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ID: 172255
2015
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Abstract
Tilting pad bearings offer unique dynamic stability enabling successful deployment of high-speed rotating machinery. The model of dynamic stiffness, damping, and added mass coefficients is often used for rotordynamic analyses, and this method does not suffice to describe the dynamic behaviour due to the nonlinear effects of oil film force under larger shaft vibration or vertical rotor conditions. The objective of this paper is to present a nonlinear oil force model for finite length tilting pad journal bearings. An approximate analytic oil film force model was established by analysing the dynamic characteristic of oil film of a single pad journal bearing using variable separation method under the dynamic
π oil film boundary condition. And an oil film force model of a four-tilting-pad journal bearing was established by using the pad assembly technique and considering pad tilting angle. The validity of the model established was proved by analyzing the distribution of oil film pressure and the locus of journal centre for tilting pad journal bearings and by comparing the model established in this paper with the model established using finite difference method.
| Reference Key |
wang2015internationalestablishment
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| Authors | ;Yongliang Wang;Yu Gao;Ying Cui;Zhansheng Liu |
| Journal | ACS omega |
| Year | 2015 |
| DOI |
10.1155/2015/531209
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