nal-workersandisaplannedtaskthataremostworkload,mostinvolvedandmostlastingtask.Besidessitemaintenanceworkchangesalongwithseasonalclimateandrequiresdifferentlyonthefocalpointandstandardofmaintenance.However,therearestillmanyproblemslikelowoperatingstandards,leakofrepairofmaintenance,short-termmaintenance,missingrepairofunnoticeablefaultsbecausemuchworkarecarriedbackandforthfromyeartoyear.Therefore,efaultrepairsandmissthebesttiming.Idohopethispapermayarousemyandothersignalworkers‘interestofdailymaintenancethustoeliminatefaultsinthebudanddecreasethepersonalinjuryorsubstantialpropertydamageresultedfromthefast-speedswitches.Key Words: ZYJ7 Electro-hydraulic Switch Machine;Fail-Safe;Routine Maintenance 目录1绪论?101.1研究背景?101.2研究目的与意义?101.3国内外研究现状?112ZYJ7型提速道岔结构与工作原理?122.1液压系统工作原理?122.1.1液压传动原理?12
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