摘要
基于滑移边界条件下的雷诺方程,不考虑密封环的变形,力平衡的条件下,利用迭代法求解获得密封腔内气膜压力函数式;根据微尺度流体流动过程中压力及转速的变化,得到不同压力下的密封面的转角及变形量的分布规律,获得相应的气膜厚度近似表达式。同时,在广义雷诺方程下,求出无变形时理论泄露量。利用Maple程序求解,得到不同压力下的密封环力变形泄漏量,并与理论值进行比对。研究表明:随气体从外径流入内径,泄漏量随着压力的增大而增大;相同工况下,与无变形泄漏量相比,有变形的泄漏量更接近于实验值,从而对密封性能产生影响。
The pressure distributions function is obtained not considering the seal rings＇ deformation, based on the Reynolds equation under the slid boundary conditions. Changing with the revolving speeds and pressure of fluid in the spiral groove, the comers and deformations of the sealing surface distributions are solved, and the approximate analytic of the corresponding gas film thickness is obtained. Meanwhile, the theoretical leakage not considering forced deformation is obtained by using the Generalized Reynolds Equation. The Maple software is applied to solve the leakages with the forced deformation in the seal ring. The leakages are calculated out and compared with the theoretical values under different pressures. The result shows that with an increasing of pressure, the leakage is increased alone the radial from the outside to inside. In the same condition, the leakage considering forced deformation is closer to the experimental values, compared with theoretical values. Thus it affects the sealing performance.
出处
《工程力学》
EI
CSCD
北大核心
2013年第B06期279-283,共5页
Engineering Mechanics
基金
国家自然科学基金项目(51165020)
