旋转密封缝隙流体流动特性及其应用基础研究

Abstract: In recent years, a new hydraulic component named Rotostat （or hydrostatic slipring） that has been developed by I. Byohelli leads to the flowing problem of the liquid that flows in the rotational symmetrical seal clearance. In this kind of seal clearance, if we ignore the influence of temperature on the viscosity of liquid, we can't optimize the power loss. So it is of great theoretical value and practical significance to study the flowing property of the liquid in the rotational symmetrical seal clearance. Slipring is a kind of important hydraulic component that is used on many kinds of equipments, but we have no enough theory and we did do enough experiment to understand its principle. In our country we are in blank on the research of the slipring, so it is necessary to begin the research, and to use the results to design new hydraulic components and optimize them. This national science fund subject introduces the reason for studying on the properties of variable viscosity, analyzes the research trend at home and abroad, does some researches mainly on the rotational symmetrical disk seal clearance and hydrostatic slipring clearance. In the process of researching we take the viscosity as function of radius instead of as constant as before, so we get the regulations of pressure distribution, temperature distribution, viscosity distribution and fiction torque in the seal clearance. What is more, we use computer to simulate the flowing field so that we can view its properties. At last we use experiment to prove the correctness of the theory and generalize the theory as well.

本课题对旋转密封缝隙中流体的流动特性进行研究。利用有限元方法求其数值解，通过实验对理论研究进行验证，并用可视化技术对缝隙中流体流动过程以流场的形式进行直观模拟，寻找出流体在旋转密封缝隙中流动时所遵循的规律，进而把得出的流体流动特性理论应用于液压元件的优化设计中，由此来提高液压元件的设计质量。.