| 摘要 |
A bellows rod seal for isolating cylinder bores from a compressible fluid filled area in a multi-cylinder heat engine, such as a Stirling engine, traversed by reciprocating piston rods. A bellows, located within a bellows cavity in a block, has one end fixed to a piston rod and another end fixed to the block between the cylinder bores and the compressible fluid filled area. One passageway joins air within the bellows cavity to air within other bellows cavities within the engine. Another passageway joins working fluid within the bellows cavity to working fluid within other bellows cavities within the engine. This air and working fluid is shuttled back and forth through the passageways as the individual bellows in the engine synchronously expand and contract. An active pressure control system, including a controller, sensor, vent and pressure tank, increases or decreases the pressure of the air within the bellows to reduce any difference in pressures between the air in the bellows cavities and the working fluid in the bellows cavities. |
