| 摘要 |
A reciprocating compressor in which the piston is axially movable within a cylindrical cavity formed on an aluminium cylinder; the piston being provided with a sealing element made from composite plastics material, an oil-scraper element made from cast iron, and a guide element made from composite plastics material; the sealing element being disposed in a first seat formed in the side wall of the piston close to an upper surface of the piston, the guide element being disposed in a second seat formed in the side wall of the piston close to a lower edge of the piston, and the oil-scraper element being disposed in a third seat formed in the side wall of the piston between the first and second seats.
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