反应堆冷却剂泵(主泵)推力轴承与径向轴承上部在出厂试验期间发生润滑油泄漏。以主泵轴承结构为依据,应用三维建模软件建立轴承上部润滑油泄漏流动区域三维实体模型,使用计算流体力学软件(CFX软件)获得润滑油的泄漏流量和压力分布。数值计算结果表明:漏油成因为甩油环设计不合理,回油孔径太小,浮动密封安装间隙值过大。最后提出设计改进方案并在试验中进行验证。 Leakage of lubricant between the reactor coolant pump (main pump) thrust bearing and the upper radial bearing during the factory test. Based on the structure of the main pump bearing, a three-dimensional solid model of the lubricating oil leakage flow area in the upper part of the bearing is established by using the three-dimensional modeling software. The leakage flux and pressure distribution of the lubricating oil are obtained by using computational fluid dynamics software (CFX software). The numerical results show that the reason of oil spill is that the design of oil slinger is not reasonable, the oil return aperture is too small and the floating seal installation clearance is too large. At last, the design improvement scheme is put forward and verified in the experiment.