ポンプ用平行環状シールの静および動特性の実験的研究 : 第1報, 静特性およびロータ回転速度による動特性への影響

抄録

A new test apparatus, which can simulate various working conditions, is constructed and applied to investigate the static and dynamic characteristics of non-contact seals. In this report the pressure drops and the leakages in four types of annular seals were measured, and the influence of rotor spinning speed on the dynamic characteristics was investigated. As a result, the static characteristics such as the pressure drops and the leakages relate closly to the inlet pressure, but they appear little change for the preswirl velocity and rotor whirling speed. As for the dynamic characteristics, they are largely affected by the rotor spinning speed. The increasing of rotor spinning speed gives an instabilizing effect to the rotor system.