筒式减振器叠加节流阀片开度与特性试验

SUPERPOSITION THROTTLE-SLICES OPENING SIZE AND CHARACTERISTIC TEST OF TELESCOPE-DAMPER

建立环形弹性节流阀片的力学模型,根据弹性力学原理建立弹性阀片弯曲变形的微分方程。利用边界条件得到环形弹性节流阀片的弯曲变形曲面通解表达式,然后对通解进行恒等变换得到节流阀片弯曲变形系数。提出一种弹性阀片弯曲变形精确计算方法。利用弯曲变形系数对节流阀片的弯曲变形进行分析研究,与目前两种计算方法进行比较,并对计算偏差对减振器设计及特性分析影响进行分析。对叠加阀片当量厚度及叠加阀片对节流阀开度的影响进行分析,对减振器在不同叠加阀片下特性进行特性试验,结果表明该研究对减振器阀系参数设计、特性分析具有指导意义。

The mechanics model of flexible ring throttle-slice and the differential equation of its deformation are established based on elastic mechanical principals. Utilizing the boundary condition, the general solution of elastic ring throttle-slice＇s deformation curved surface is obtained, and a deformation coefficient of elastic throttle-slice is formed by identical transformation of the general solution of elastic throttle-slice. Then a precise method for calculating ring throttle-slice deformation is put forward. The bending deformation of throttle-slice is analyzed based on the deformation coefficient, and comparison with two common-used approaches is also performed about influence of calculation deviation on design and performance of damper. The effect of the equivalent thickness of superposition throttle-slices on throttle opening size is studied. Experimental results on telescope-damper performance at different superposition throttle-slices show that the research can play an important role at damper valves design.