Improvements in or relating to pressure-fluid bearings for rotating shafts

摘要

1,010,547. Bearings. COMMISSARIAT A L'ENERGIE ATOMIQUE. Nov. 7, 1963 [Nov. 14, 1962], No. 44003/63. Heading F2A. A fluid bearing has a circumferentially-spaced series of bearing elements surrounding a shaft, the elements being mounted so as to allow individual radial displacement towards and away from the shaft, a pressure chamber defined in each element and at least one orifice formed therein which communicates with the pressure chamber, pressurized fluid being supplied to all of said pressure chambers. In an embodiment, a shaft 23 is mounted in fluid bearings 1, 2, which are separated by a tubular member 3 having weight-reducing cut-outs therein, the whole being surrounded by a cylindrical casing 4. The latter is screwthreaded internally at both ends to receive a retainer 5 which retains the bearing 1 and to receive a member 6 which retains the bearing 2 and carries a storage tank 25 which is supplied with pressurized fluid, by means not shown. Each bearing has a housing 15 having a wall which, along with the casing 4, forms an annular reservoir 14; each housing 15 has a base with vents 21 therein; and each housing 15 has a cover-plate 16 secured thereto, the latter also having vents 21 therein. Each bearing element 8 has a radially-inner part 9 which is recessed to receive a radially-outer part 10, a pressure chamber 11 being formed therebetween. The parts 10 each have a pipe 13 held thereby and passing therethrough, the pipe 13 communicating with a respective hole in the reservoir 14. The radial outward movement of the elements 8 may be restricted by a ring 7 of elastic material which is received in grooves 12 of the members 10; alternatively, each element may be supplied with an individual spring, not shown. In use, pressurized fluid is supplied from the tank 25 to the annular reservoirs 14 via pipes 27, 28 and the fluid is passed to the individual pressure chambers 11 through a pipe 13. The pressurized fluid is then conveyed to the shaft 23 via orifices 20 in the members 9. Any pressurized fluid which enters the annular chamber formed by the inner wall of the reservoir 14 and the outer walls of the members 10, escapes through vents 21. The shaft 23 may be supported axially by pressurized fluid supplied from the tank 25 to a chamber 26 in the member 6.