SEALING SYSTEM WITH PRESSURE COMPENSATION FOR ROTATION OF MOVEMENT SHAFT Russian patent published in 2015 - IPC F16J15/00 

FIELD: machine building.

SUBSTANCE: invention relates to the sealing system with pressure compensation for rotation of movement shaft of the machine intended for compartment sealing. The system contains a first medium arranged around the shaft, and includes at least ring seal intended for the specified compartment isolation. Sealing is located radially around the shaft and is held by the seal holder. The sealing system contains: device for pressure amplification connected with the seal holder, containing cylindrical pipe and piston equipped with two heads with different diameters and intended for the cylindrical pipe division to two isolated chambers with different diameters corresponding to diameters of the piston heads. Chamber with smaller diameter is connected with the seal holder and interacts with the first medium, and chamber with larger diameter is filled, at least partially, by the second medium; and medium recuperation device connected with chamber with larger diameter filled with gas and intended for gathering of part of second medium from the specified chamber during the piston movement to ensure that pressure at level of the first medium in contact with the specified seal exceeds the external pressure applied to the specified seal.

EFFECT: invention improves the sealing system reliability.

10 cl, 4 dwg