process for the production of a hydrodynamic axialdrucklagers

摘要

1355423 Bearings N LAING 1 July 1971 [1 July 1970] 30899/71 Heading F2A A bearing element for a hydrodynamic bearing is made from a member having alternating areas of materials, one material being more susceptible to removal than the other by exposure of the total surface so as to form grooves which facilitate generation of pressure in a bearing fluid. The material may be removed electrochemically, by electrical erosion, chemical etching, or abrasion. Suitable materials are metal and resin; metal and ceramics; ceramics of different hardnesses; carbon and soft materials. The materials are preferably so arranged that the grooves formed are spiral. The member having the surface of the two materials may be made by filling apertures, e.g. with white metal 2 in a bronze body 1. The white metal may then be partially removed by abrasion. Alternatively the body may be moulded, e.g. of carbon or a sintered ceramic, with grooves which are filled with the second material, e.g. metal oxide or a graphite filled phenolic resin. Alternatively the body may be of sintered corundum or ruby which has grooves filled with silica containing sintered corundum. A further alternative is to place spiral shaped arms on a moulding ball which rotates about its axis while molybdenum is deposited on the mould and arms by flame or plasma spraying. Alternatively the mould by sprayed tungsten or titanium carbide or with chromium nickel alloys or with platinum.