Analysis and full scale testing of an aspirating face seal with improved flow isolation

Turbomachinery Clearance Control

“…Aspirating face seals are noncontacting seals that are designed to establish an equilibrium position within close proximity of the rotor surface regardless of the seal diameter. [156][157][158][159][160][161] Aspirating seals have a potentially significant performance advantage over conventional labyrinth seals, particularly at large diameters. In addition, these seals are inherently not prone to wear, owing to their noncontacting nature, so their performance is not expected to degrade over time.…”

Charakterisierung des Betriebsverhaltens axial adaptiver Gleitringdichtungen mit Lufteinblasung

“…Die zuvor beschriebenen Untersuchungen über axial adaptive Gleitringdichtungen mit Lufteinblasung belegen die Realisierbarkeit der Technologie und bestätigen die wesentlichen Vorteile gegenüber dem Einsatz mehrstufiger Labyrinthdichtungen in Turbomaschinen. In den Studien von Hwang et al (1996), Wolfe et al (1996), Turnquist et al (1997), Turnquist et al (1998) und Turnquist et al (1999b) sind die folgenden Aspekte des stationären Betriebsverhaltens diskutiert worden:…”

Detailed Study on Stiffness and Load Characteristics of Film-Riding Groove Types Using Design of Experiments

“…Early attempts to develop a film-riding seal focused mainly on face seals. Designs include the face seal [2], the Double Divert Spiral Groove Face Seal [3], the Aspirating seal [4] and the foil face seal [5]. One of the main challenges reported in literature was the high levels of thermal distortion experienced at the high diameter applications and small film heights [6].…”