Improvements in or relating to Spiral-Groove Hydrodynamic Bearings

摘要

1,163,018. Bearings. PHILIPS' GLOEILAMPENFABBIEKEN N.V. 30 Sept., 1966 [5 Oct., 1965], No. 43833/66. Heading F2A. A hydrodynamic bearing comprises bearing members 1, 2 having first and second surfaces supporting axial and radial loads respectively, one first surface having spiral grooves 6, one second surface having a helical groove 9, and a further helical groove 15 being provided to transfer lubricant from a reservoir 11 to the spiral grooves 6. In Fig. 1 shaft 2 has two collars 3, 12 forming the reservoir. Spiral grooves 6 in member 1 urge lubricant towards the shaft axis, the lubricant then passing between bearing surfaces 7, 8 and returning through ducts 10. Helical groove 9 urges lubricant axially towards the grooves 6 and acts as a seal. Helical groove 15 transfers lubricant to the outer ends of grooves 6 and helical groove 14 acts as a seal. Alternatively, all the grooves may be provided on a sleeve member secured to the shaft.