FIELD: instrument engineering.
SUBSTANCE: invention relates to a shaft seal (SHS) for sealing the gap (G) formed when the shaft (S) passes through the case C, these sealing surfaces being opposite to each other in the sealing plane (SEP), wherein the sealing plane (SEP) extends substantially radially relative to the shaft (S). Stable sealing surface (SSS) and rotating sealing surface (RSS) are fixed to the support (RSUP, SSUP), in particular on the stable support (SSUP) and the rotating support (RSUP), and the sealing surfaces (RSS, SSS) are elastically split relative to each other by stretching the elastic element (ELL), or, at least a stable support (SSUP), or a rotating support (RSUP).
EFFECT: for simplicity, along with the operating method, the inner secondary seal (SS2) includes at least a first labyrinth seal (LTS1) and the inner secondary seal (SS2) includes at least a device for (SLF) suction of liquid fluid on the outside of the first labyrinth seal (LTS1).
6 cl, 2 dwg
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