Abstract: A rotary ring seal with gas-dynamic lubrication for high-speed turbomachines, particularly gas turbine engines, in which one of two complementary rings is radially perforated with apertures which extend in parallel with the ring sealing face and which are supplied with a cooling liquid. In order to achieve a durable seal, particularly with regard to high temperatures and speeds, a circumferentially periodically uniformly increasing and decreasing number of holes extending through the mating ring provide for the generation of a periodically alternating temperature and, consequently, an axial-expansion zone of the ring so as to produce a periodically uniformly undulated sliding surface on the mating ring which corresponds to the lubricant wedge profile of a gas-dynamic thrust bearing.

Abstract: A radial bearing for high-speed turbo-machinery, which is constructed as an aerodynamic or spontaneously-acting bearing, wherein a spirally-wound foil is inserted in an annular space formed between the inner bearing journal and the outer bearing sleeve.