Reciprocating-piston compressor having non-contact gap seal
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United States of America Patent
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Apr 3, 2012
Grant Date -
Sep 3, 2009
app pub date -
Feb 20, 2007
filing date -
Feb 20, 2006
priority date (Note) -
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Abstract
A reciprocating-piston compressor having at least two working cylinders arranged in series, along a cylinder axis is described. The compressor includes a piston in each of the cylinders, guided in an axially movable manner, and a common axially actuated piston rod of the pistons, extending through a passage opening in a partition between the at least two working cylinders. The at least two working cylinders are sealed off with respect to one another in a region of the common axially actuated piston rod, exclusively by a non-contact seal. The axial seal has an axial gap seal formed between a radially outer circumferential surface of the common axially actuated piston rod and a radially inner circumferential surface of the passage opening.
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