SCREW-SHAPED SEALING OF SHAFT Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: screw-shaped sealing member located in the body bore and enclosing the shaft in a spaced relation is made of a flexible material and installed with one end resting against the bore end, and with the other end against the limiting flange. Made inside the member is a space that is blind on one side, and communicates with the control pressure source on the other side. The member has an elliptical shape, the maximum dimension of its section is oriented in the plane passing through the shaft axis and located in parallel with the axis. The pressure source is adjustable. EFFECT: enhanced reliability. 2 cl, 1 dwg