栅板密封对流道侧壁变形的随动模型  

Wafer Seal Servo Model under Distorted Engine Panel

作　　者：李鸿举 刘莹[1] 黄伟峰[1] 李国志 米洁[2] 赖汉荣 LI Hongju;LIU Ying;HUANG Weifeng;LI Guozhi;MI Jie;LAI Hanrong(State Key Laboratory of Tribology,Tsinghua University,Beijing 100084;School of Mechanical and Electrical Engineering,Beijing Information Science&Technology University,Beijing 100192)

机构地区：[1]清华大学摩擦学国家重点实验室,北京100084 [2]北京信息科技大学机电工程学院,北京100192

出　　处：《机械工程学报》2020年第23期239-248,共10页Journal of Mechanical Engineering

摘　　要：针对可变流道栅板密封,以外凸变形的流道侧壁为边界条件,建立了栅板密封在弹性元件预紧力作用下适应流道侧壁变形的理论分析模型。基于合理假设,通过分析桥接元件和栅板工作状态,指出栅板密封存在泄漏间隙和悬浮间隙;提出了工作状态下栅板密封间隙大小及分布的计算方法,为研究栅板密封流固热耦合问题提供了几何边界条件;分析了栅板厚度、桥接元件刚度和弹簧参数等对栅板密封随动效果的影响,指出泄漏间隙随栅板厚度减小而单调减小,悬浮间隙随桥接元件弹性模量和截面惯性矩减小而减小,并随弹簧刚度或数量的增加而线性减小。Aimed at wafer seal developed for removable engine panel and restricted with distorted engine panel condition, theoretical servo model under spring force is established in consideration of real panel distortion. Based on reasonable assumption, working conditions of bridge element and wafers are analyzed, the exist of leakage gap and suspension gap is proved. The computing method of size and distribution of wafer seal gap are obtained under working conditions mentioned above, geometry boundary conditions can be provided to fluid-thermal-solid interaction research of wafer seal. Influence factors of wafer seal servo effect, such as thickness of wafers, stiffness of the bridge element and parameters of springs are discussed, it is pointed out that leakage gap decreases monotonically with the decrease of the thickness of wafer, the suspension gap decreases with the decrease with the elastic modulus and the moment of inertia of the section, and decreases linearly with the increase of the stiffness and number of springs.

关 键 词：栅板密封 变形 随动模型 间隙 

分 类 号：TK49[动力工程及工程热物理—动力机械及工程]