| 摘要 |
A compliant foil hydrodynamic fluid film radial bearing is disclosed which is comprised of a cylindrical rotor, fluid foil(s) (18), spring foil(s) (16), and a foil retaining cartridge (12). The cartridge has circumferentially undulating cam shaped lobes (22) or has circumferential ramps and joggles that induce the spring and fluid foils to form converging fluid-dynamic wedge channels (24) which compress and pressurize the process fluid and diverging channels (26) which draw in makeup fluid. A spring foil is formed as a thin, flat sheet having chemically etched slots of a pattern that causes cantilever beams (40) to stand erect and function as springs when the foil is bent to install in the cartridge. When a single foil is used in lieu of a plurality of foils made up of segments, that foil is preloaded away from the rotor by bending stresses in the foil that are induced when the foil is bent to fit into the cartridge. |
