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학술대회자료
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대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2004년 추계학술대회논문집
발행연도
2004.11
수록면
1,016 - 1,021 (6page)

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The need for developing a mathematical model for pad-pivot friction in tilting pad journal bearings has been well-recognized, since previous experimental work about the performances of the bearings hypothesized that the friction in the bearings is closely related to their performances. Especially, the sliding friction between pad and pivot in the ball and socket type of the bearings can influence the performance of the bearing. We propose a mathematical model for pad-pivot friction in the ball and socket type, which considers the geometrics of the pad and pivot of the bearings, by assuming the sliding friction in the ball and socket bearing as Coulomb friction. By utilizing the proposed model for pad-pivot friction, we show the analysis of Reynolds equation and energy equation, which explain the thermo-hydrodynamic characteristics of tilting pad journal bearings, by taking into account the turbulence and inlet pressure building as well. The results of the study show that the performance of titling-pad journal bearings can be greatly influenced by the pad-pivot friction. In particular, we have shown that the analysis of the pad-pivot friction is useful to explain the static journal loci and the dynamic characteristics of the ball and socket type of the bearings. Furthermore, for a given operating condition, we can obtain various equilibrium states which satisfy the static equilibrium conditions, by considering the pad-pivot friction.

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Abstract

1. Introduction

2. Method

3. Results and discussion

4. Conclusion

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UCI(KEPA) : I410-ECN-0101-2009-550-014419861