| 摘要 |
<p>The condensate of closed cycle power plantthat uses an organic working fluid for lubricating the bearings (25) of the turbine (13) is cooled to a temperature below the condenser temperature by an auxiliary cooler (42) before being supplied to the bearings. This subcooling of the lubricating liquid increases its viscosity to a value which causes the minimum thickness of the lubricating film in the bearings to be increased significantly. By increasing the minimum film thickness, the filtering demands on the lubricating condensate are reduced and the surface finish of the journals and bearings is less critical permitting the journals and bearing to be finished by standard precision grinding techniques. In a specific embodiment of the invention, a canister (19) housing the turbine/generator (31) is provided with a sump (39) for collecting liquid working fluid which is delivered to the bearings through a cooler (32) Where the prime mover (13) is coupled to a generator (31) through a gearbox (27, 28) all of which are contained in the sealed canister (19), the viscosity of the condensate may be increased to such a level that the cooled working fluid is adequate to lubricate the gearbox (27, 28) itself.</p> |
