| 摘要 |
1486661 Shaft seals CARRIER CORP 6 Jan 1975 [21 March 1974] 438/75 Heading F2B In order to prevent, in e.g. a turbine shaft seal, bushing seals from over-heating druring start-up or slow-running, some or all of the bushing seals are cooled by coolant circulating in a self-contained circuit. A barrier fluid is supplied under high pressure from pump (76, Fig. 2, not shown) to port 33 and lubricates floating bushing seal 24, which is optionally uncooled. Leakage of barrier fluid into the working fluid space is removed via purge line 32. A valve (82) is responsive to the pressure of the working fluid to maintain the required pressure differential of the barrier fluid. Coolant is circulated by low pressure pump (71) to space 60 to cool the finned floating bushing seals 40, 41 and 42. |
