| 摘要 |
A bearing arrangement for a turbine rotor 10 of a turbine 3, adapted to be mounted in a drill string 2 and to be driven by the flow of drilling fluid, comprises a turbine chamber 11 surrounding the turbine rotor 10 and having an inflow 7 and an outflow 8, a stator 12, 15 on which the turbine rotor 10 is rotatably mounted, and a cavity 32 formed between the turbine rotor 10 and the stator 12, 15 and accommodating at least one radial plain bearing 16, 17 and being separated from the turbine chamber 11 by an axial plain bearing 18 constructed as a bearing ring seal, and by a conveyor screw 22 which is disposed on the turbine rotor 10 and operates to convey from a cavity 30 to the turbine chamber 11. The conveyor screw seals against the ingress of foreign matter into the cavity 30 which may form a gap between a rotor and stator of a generator which is driven by the turbine 3. |
