Dynamic analysis of wedge-type shaft seal

Abstract

The hydrodynamic seal under study here consists of two lands - one plain and the other having a wedge. The two lands are separated by a circumferential oil-supply groove. The wedge parameters significantly affect the performance of seal. The effects of various wedge parameters on dynamic stability of the hydrodynamic seal have been studied. Stiffness and damping coefficients for lateral and skew motions, critical nondimensional mass and critical nondimensional inertia have been evaluated for different wedge parameters at different eccentricities. The equations of motion of the seal center for four degrees of freedom have been derived and considering lateral and skew motions, stability studies have been made using Routh criteria.