SEALING DEVICE Russian patent published in 2024 - IPC F16J15/3212 F16J9/06 

FIELD: machine building.

SUBSTANCE: invention relates to valve seals of pistons in power engineering systems. In the device at the end of the piston, having an axial two-stage cylindrical protrusion, on one stage of which there is a collar with a petal spring and a washer with a conical surface contacting and centring the toroidal surface of the nut tightened on the threaded stage, and on the end surface of the piston pressed to the collar there are annular projections, on the washer there is an annular groove, where a disk spring is installed, which also presses the collar flange to the piston.

EFFECT: providing the required degree of tightness of the sealing device during operation in the zone of cryogenic temperatures.

1 cl, 1 dwg