无轴泵喷推进器水润滑轴承间隙流水动力设计与试验

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...

Hydrodynamics Design and Tests of Clearance Flow in Bearings of Shaftless Pump-jet Thrusters

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.