| 摘要 |
The device mounted on the piston rod of stirling engine, prevents the lubricating oil from penetrating to upper piston. The device comprises scraper ring (2) with an open end, supported by the material (3) combined with the inner wall of the piston rod; oil absorbing material (3) and housing (1) combined at the outer side of the ring (2); housing (1) fixed between bottom of cylinder and upper surface of crank case. The material having semicircular shape, is composed of sintered alloy, which permits passing of gas, prohibites passing of lubricating oil.
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