FIELD: machine building.
SUBSTANCE: invention relates to machines for positive displacement and can be used in making medium and high pressure compressors. Piston two-stage compressor comprises first 1 and second 2 stage cylinders, pistons 3 and 4 connected by rod 5 to reciprocation drive 6. Piston 3 divides cylinder 1 into two parts – gas 7 and fluid 8 cavities and comprises a protrusion in form of piston 9 entering additional cylinder 10, filled with cooling liquid, connected to cooling system 11 of cylinder 1, which includes under-piston cavity 8 and cavity 12 of cylinder 10. It is possible to compress gas in two stages of the compressor to pressure higher than 100 bar.
EFFECT: this design can replace common three-four-stage piston compressor.
4 cl, 3 dwg
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