Study on transient performance of tilting-pad thrust bearings in nuclear pump considering fluid-structure interaction

Li Qiang; Li Bin; Li Xiuwei; Xie Quntao; Liu Qinglei; Xu Weiwei

doi:10.1016/j.net.2023.03.007

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자료유형: 학술저널

저자정보: Li Qiang (College of New Energy China University of Petroleum (East China)) Li Bin (College of New Energy China University of Petroleum (East China)) Li Xiuwei (College of New Energy China University of Petroleum (East China)) Xie Quntao (College of New Energy China University of Petroleum (East China)) Liu Qinglei (College of New Energy China University of Petroleum (East China)) Xu Weiwei (College of New Energy China University of Petroleum (East China))

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제6호

발행연도: 2023.6

수록면: 2,325 - 2,334 (10page)

DOI: 10.1016/j.net.2023.03.007

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To study the lubrication performance of tilting-pad thrust bearing (TPTBs) during start-up in nuclear pump, a hydrodynamic lubrication model of TPTBs was established based on the computational fluid dynamics (CFD) method and the fluid-structure interaction (FSI) technique. Further, a mesh motion al gorithm for the transient calculation of thrust bearings was developed based on the user defined function (UDF). The result demonstrated that minimum film thickness increases first and then decreases with the rotational speed under start-up condition. The influence of pad tilt on minimum film thickness is greater than that of collar movement at low speed, and the establishment of dynamic pressure mainly depends on pad tilt and minimum film thickness increases. As the increase of rotational speed, the influence of pad tilt was abated, where the influence of the moving of the collar dominated gradually, and minimum film thickness decreases. For TPTBs, the circumferential angle of the pad is always greater than the radial angle. When the rotational speed is constant, the change rate of radial angle is greater than that of circumferential angle with the increase of loading forces. This study can provide reference for improving bearing wear resistance.

#Nuclear pump #Tilting pad thrust bearings #Fluid-structural interaction #Start-up #User defined function (UDF) #Computational fluid dynamic (CFD)

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