GAS SEAL Russian patent published in 2019 - IPC F16J15/34 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to gas seal (DGS), in particular to dry gas seal extending along direction (CDR) along circumference relative to axis (X), comprising: rotating contact sealing ring (RSR) and fixed contact sealing ring (SSR). Fixed contact seal ring (SSR) moves along axis, wherein gas seal (DGS) comprises sliding bushing (SLV), clamping element (PSE) adjacent to fixed contact O-ring (SSR) to first surface (CSF 1) of abutment by means of second surface (CSF 2) of abutment, wherein clamping element (PSE) moves along axis. Elastic element (EEL) presses in its axial direction with its sealing surface (SFC) fixed contact sealing ring (SSR) by means of a clamping element (PSE) to a rotating contact sealing ring (RSR), wherein sliding sleeve (SLV) radially guides by means of first sliding surface (SSF 1) of clamping element (PSE) to third surface (SSF 3) of sliding along axial mobility. Clamping element (PSE) comprises a seal (SSL) which seals the slit extending in the circumferential direction between the clamping element (PSE) and the sliding sleeve (SLV), and has two sections (PSE 1, PSE 2) extending in the circumferential direction. First section (PSE 1), to which resilient element (EEL) and second section (PSE 2), having second abutment surface (CSF 2), note here that said seal is located at least partially by fixation section (FXS) between both sections (PSE 1, PSE 2), wherein second section (PSE 2) comprises third sliding surface (SSF 3). For a wide range of application of the arrangement it is advisable if the first section (PSE 1) consists essentially of metal, wherein the second section (PSE 2) consists essentially of ceramics.

EFFECT: invention provides unloading of secondary seals.

6 cl, 1 dwg