Hot gas engine comprising sealing means around piston rods
OwnerS. Gunner K. Lundholminventor
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Abstract
Oil-tight flexible partitions are provided to prevent oil leakage to the working gas of a Stirling cycle engine along the piston rods from oil-lubricated reciprocating seals. The upper and lower chambers formed in part by the flexible partitions are interconnected through an oil filter for preventing oil leakage to the upper chambers while minimizing the pressure differential across the flexible partitions by allowing gas flow between the upper and lower chambers.
Claims5
A multi-cylinder hot gas engine of the kind in which each cylinder contains a piston connected to a piston rod which extends through a reciprocating seal and a casing wall and is connected to a drive mechanism located in the casing in which the pressure is substantially lower than the minimum pressure in the cylinders, the piston rods being oil-lubricated in the casing and providing oil-lubrication for the reciprocating seals, characterized in that each piston rod extends through a chamber formed in part by the respective piston and the casing wall, and that a flexible partition is positioned in said chamber between the reciprocating seal and the respective piston for preventing contamination of the gas by oil leakage along said piston rod through the respective oil-lubricated reciprocating seal, said chamber being divided into a chamber upper part and a chamber lower part by said respective flexible partition.
Dependencies are inferred from the claim text.