The expander, which revolution of the turbine reaches 40 000 r/min, is the center element for nature-gas separating. So the emphases are taken on the lubrication, vibration and temperature of the bearings. The PLC inspecting system can monitor the running state of the expander and deal with the different faults in order to ensure the safety.
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张德林 张国荣. 膨胀机运行故障PLC检测系统[J]. 科学技术与工程, 2004, (12): 1053-1055. ZHANG Delin, ZHANG Guorong. PLC Inspecting System for Running Faults of Expander[J]. Science Technology and Engineering,2004,(12):1053-1055.