FIELD: machine engineering.
SUBSTANCE: piston machine comprises a cylinder 1, a piston 2 arranged with a gap, suction 5 and discharge 6 valves. The sealing device is in the form of liquid-containing cavity 12 between the piston 2 sealing part 10 and the cylinder inner surface in its lower part 13. The cavity 12 is connected by the hole 14 to the tank 15 filled with liquid, when the piston is in bottom dead center.
EFFECT: complete tightness of the cylinder-piston group during non-contact operation of the piston.
4 cl, 6 dwg
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