Mechanical face seals are used with most types of mechanical equipment, thus understanding the behavior of sealing systems is required for improved performance.The present paper investigates a type of seal utilized in automotive cooling water pumps,which,under particulars ervice conditions,generates undesired acoustic emissions and manifests malfunctioning.Theproblem is examined through a lumped parameter model together with a mixed friction tribological model.Numerical simulations demonstrate that thephenomenon is caused by the insurgence of stick-slip vibrations during shaft deceleration. In addition,the stability threshold is investigated and the influences of some design parameters are evaluated.
Undesired acoustic emissions of mechanical face seals: Model and simulations
BRACCESI, Claudio;VALIGI, Maria Cristina
2014
Abstract
Mechanical face seals are used with most types of mechanical equipment, thus understanding the behavior of sealing systems is required for improved performance.The present paper investigates a type of seal utilized in automotive cooling water pumps,which,under particulars ervice conditions,generates undesired acoustic emissions and manifests malfunctioning.Theproblem is examined through a lumped parameter model together with a mixed friction tribological model.Numerical simulations demonstrate that thephenomenon is caused by the insurgence of stick-slip vibrations during shaft deceleration. In addition,the stability threshold is investigated and the influences of some design parameters are evaluated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
