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我厂5-200/12型氨压机,在运行过程中,气缸活塞、活塞环磨损相当严重,几次拉缸,被迫镗缸二次,气缸直径已由原来φ270毫米镗为φ272毫米。为了解决拉缸问题,我们曾在活塞环上镶铜和巴氏合金,由于工艺复杂、成效甚微而未能继续使用。为了彻底解决这个问题,决定对活塞、活塞环的结构进行改造,在活塞裙部镶进四块耐磨铜板,采用背压式填充聚四氟乙烯活塞环。三年多来,运行正常,效
I plant 5-200 / 12-type ammonia press, in operation, the cylinder piston, piston ring wear is quite serious, several times pull the cylinder, cylinder was forced to second boring, cylinder diameter from the original φ270 mm bore φ272 mm. In order to solve the cylinder problem, we have inlaid on the piston ring copper and Babbitt alloy, due to the complexity of the process, with little success and can not continue to use. In order to completely solve this problem, it is decided to reform the structure of the piston and piston ring, insert four wear-resistant copper plates on the skirt of the piston, and use the back pressure-filled polytetrafluoroethylene piston ring. More than three years, normal operation, effectiveness