| 摘要 |
1363664 Bearings N LAING 1 July 1971 [1 July 1970] 30900/71 Heading F2A [Also in Division B3] A concave bearing element is made by depositing particles of material on to a convex mould 1 dimensionally complementary to the required element and simultaneously cyclically moving the mould relative to the source of particles 7 so that the deposition is uniform. The mould may be continually rotated while the particles are sprayed from a nozzle which is cyclically oscillated in a plane passing through the centre of curvature of the mould. The mould may, prior to the deposition, be uniformly coated with a mould release agent. When the deposition is performed at high temperature the mould may be internally cooled, e.g. by liquid gas. The surface of the mould may also be cooled by blowing gas on to it. The deposition may be effected by plasma spraying, flame spraying, electroplating or chemical plating. Bearing elements may be formed having a thin surface layer of rhodium, nickel, platinum, gold, bearing bronze or chromium on a thick backing layer, e.g. of cast or low melting metal or synthetic resin. The convex mould may be provided with projections which form recesses or grooves (e.g. spiral grooves) in the element which facilitate hydrodynamic operation of the bearing. |
