0430 Rotordynamic Characteristics of Mechanical Seal under Whirling Motion

Abstract

Mechanical seal is often applied to separate turbine from pump in rocket turbopumps. Turbopump has suffered from rotor vibration problems. In this study, we measure rotordynamic characteristic of mechanical seal under whirling motion. Rotordynamic force of this seal was measured by the rotordynamic test stand (JARTS) with active magnetic bearings. It was found that the mechanical seal may have desatbilizing effect under forward whirling motion.