| 摘要 |
The invention relates to a shaft seal (SHS) for sealing off a gap (G) of a feedthrough (PT) for a shaft (S) through a housing (C), wherein these sealing surfaces are located opposite one another in a sealing plane (SEP), wherein the sealing plane (SEP) has an extent that is substantially radial with respect to the shaft (S), wherein the stationary sealing surface (SSS) and rotating sealing surface (RSS) are fastened to a support (RSUP, SSUP), specifically a stationary support (SSUP) and a rotating support (RSUP), and the sealing surfaces (RSS, SSS) are braced elastically against one another in that either at least the stationary support (SSUP) or the rotating support (RSUP) is pretensioned by means of an elastic element (EEL). For simplification, in addition to an operating method, it is proposed that the inner secondary seal (SS2) has at least one first labyrinth seal (LTS1) and that the inner secondary seal (SS2) has at least one barrier-fluid suction system (SLF) on the outer side of the first labyrinth seal (LTS1). |
