Abstract: This paper aimed at the SPT open water self-lubricating structure of the support/thrust integrated water-lubricated bearings with hub layout type. According to the high-speed and high-pressure flow generated by the blades， the water-lubricated bearing lubrication and cooling flow channels were designed thus forming an integrated self-circulating lubrication scheme of support/thrust bearings. Due to the coupling effectiveness of blade hydrodynamics and bearing clearance flow， an iterative design method of bearing clearance flow was proposed. Then a hydrodynamics coupling calculation model for the clearance between the blade and the bearing was established， and the quantitative calculation and analysis of the bearing clearance flow of the SPT was realized. In addition， the open water test of the SPT and bench test of the integrated water-lubricated bearing were completed. In the entire test interval， the maximum error between the calculated values and test results of the thrust coefficient and the bearing clearance flow rate are as 6.2% and 4.6% respectively， which verifiy the effectiveness and accuracy of the design method and calculation model. The proposed methods have important engineering significance for the design and optimization of the SPT. 

Key words: shaftless pump-jet thruster(SPT), water-lubricated bearing, bearing clearance flow, open water test, bench test

摘要： 针对无轴泵喷轮毂布置式水润滑支撑/推力轴承的敞水自润滑结构，以桨叶做功后产生的高速高压流场为输入来设计轴承的润滑和冷却流动通道，形成一体化支撑/推力轴承的自循环润滑方案。鉴于桨叶水动力与轴承间隙流的耦合影响作用，提出了两者迭代的设计方法，建立了桨叶与轴承间隙水动力耦合计算模型，实现了无轴泵喷轴承间隙流量的定量计算与分析，完成了无轴泵喷推进器样机敞水试验和一体化水润滑轴承台架试验。在整个测试区间内，推力系数和轴承间隙流量计算值与测试值最大误差分别为6.2%和4.6%，验证了设计方法和计算模型的有效性与准确性。所提方法对无轴泵喷推进器水力性能的设计与优化具有重要的工程意义。

关键词: 无轴泵喷推进器, 水润滑轴承, 轴承间隙流, 敞水试验, 台架试验