Patent ID: 6575470
Filing Date: 2003-06-10
Classification: F16J

Abstract:
Non-contact mechanical face seals comprising sliding rings (1-5) having grooves (r) formed in the lateral planes thereof, each said groove (r) having an inlet end and an outlet end a transverse cross-section decreasing from the inlet end toward the outlet end, the groove (r) having a recess (Zk) with respect to the lateral plane of approximately 7 &mgr;m at the outlet end, the surface of the bottom of the groove (r) in its longitudinal direction running alongside a curve (k) having a maximum increase in height of up to approximately 4 &mgr;m, while the surface of the bottom of the groove (r) in its transverse direction runs alongside a curve (k1) between lateral edges of the bottom of the groove with a maximum increase in height of up to approximately 4 &mgr;m, the lateral edges of the bottom of the grooves being distant from the lateral plane of the ring by respective values of depth (Hk, Hp), wherein one (Hk) of the values of depths of said lateral edges is greater than the other (Hp) and is up to 7 &mgr;m.