指尖封严磨损特性及其对泄漏影响的试验

对间隙、过渡、过盈3种配合的指尖封严的磨损特性及其对泄漏的影响进行了试验研究,分析了不同配合状态下封严件与转子的磨损现象、磨损长度以及封严泄漏系数的分布.试验结果表明:封严磨损随封严与转子相对滑动距离增大而增加；间隙配合状态下,封严出现局部磨损,磨损及其对泄漏的影响主要发生试验初始阶段；过盈配合时,封严件整体均出现磨损,且磨损发生在整个试验阶段,磨损对泄漏的影响在初始阶段较大、之后逐渐减小；封严的间隙越小(过盈量越大),磨损对泄漏影响越大. 

Experiment of wearing characteristics and its effect on leakage of finger seal

Wearing characteristics of rotor and its effect on leakage of finger seals under three different kinds of fit, namely clearance fit, transition fit and interference fit, were experimentally investigated. The wearing of the rotor, wearing length of seal and distribution of leakage coefficient were analyzed. The results show that the wearing is severer when the sliding distance between the seals and the rotor increases. For finger seal with clearance fit, the seal is partially worn and the wear and its effect on the leakage mainly occur at the beginning of the experiment. For finger seal with interference fit, the whole seal is worn and the wear occurs throughout the experiment. The effect of wearing on the leakage is notable at the beginning and then is gradually decreased. The effect of wearing on leakage is greater when the clearance is smaller or the interference is larger.