| 摘要 |
A thermal machine is configured as a Stirling engine and has an output shaft 11 rotatably mounted in a casing 13 together with a seal arrangement 10 for the shaft including two lip seals 16,17 confronting each other and mounted in a housing 23 in the casing, to surround the shaft. The machine has a source 24,25 of lubricating oil which is supplied to the housing between the two lip 5 seals, at a greater pressure than that prevailing within the casing. The machine has a heat exchanger 35 to supply heat to a hot piston-and-cylinder combination, that heat exchanger being supplied with hot gases from a combustion chamber 34 in which a hydrocarbon fuel is burnt. A compressor 30 drives combustion air into the chamber 34, the compressor 30 being driven by a 10 turbine 31 receiving the hot gases following their passage through the heat exchanger 35. |
