高速往復動オイルフィルムシールの弾性流体潤滑

第2報, ポリアミド樹脂リングを用いた静止実験

抄録

In the 1st report, numerical analysis for oil film seal considering elastic deformation of rings was presented. It was shown that the elastic deformation of ring has an important effect on seal performance under the condition of high hydraulic pressure and large-sized rings. And it was found that seal gap become null in high-speed condition, caused by negative hydrodynamic pressure. In this study, experimental tests have been performed using rings made of polyamid resin in order to examine the validity of the numerical analysis. Measured leakage rates are decreased with the increase of hydraulic pressure in high pressure zone. Measured results of oil leakage rate are confirmed to be in good agreement with predicted ones considering the elastic deformation and thermal expansion of rings Also, it is confirmed that rings with step on inner face have an effect on holding clearance as predicted.