HYDRODYNAMIC SEAL FOR CYLINDER PAIR Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: radial openings are made in a bushing, which seals piston or cylinder, over periphery. A sleeve is provided with radial openings arranged over periphery. There are ring bores in the sleeve. Expanders are received in the bores. The bushing is thin-walled and set in the bearing sleeve with a spaced relation. The radial openings of the bushing are arranged by several rows each of which is positioned between the expanders from the side of high pressure. EFFECT: improved sealing. 3 dwg