manbw主機fiva故障診斷分析(參考版)
2025-06-28 07:10本頁面
【正文】 s staff to check the exhaust valve spring air sealing condition by checking exhaust valve spindle dropdown time, as shown in attached abstract of M/E instruction manual( Maintenance / 908 Exhaust valve).This checking (for dropdown time) to be done after stopping LO pump on hullside,otherwise exhaust valve spindle is dropped by normal LO pressureand actual time for dropdown condition cannot be measured.Also, please check spring air tightness condition with following the procedure shown in 2nd page of attached manual.Please kindly inform us about all checking results.We hope your kind understanding and cooperation to the above,and awaiting the parts forwarding address information and checking results.。s information, we understand that crew carried out Function test for the unit,but condition was not improved.But, in case same trouble condition is observed on FIVA Valve in the future,please try to reset of CCU for the unit first by turnoff the power supply to the CCU,before replacing FIVA Valve.Power supply to each CCU can be cut by turnoff the breakers on Power supply unit A amp。在2015年2月28日早上8點39分40秒本船來了Exhaust Valve Stroke Low(SlowDown)CCU2_03023209警報，隨即恢復(fù)正常，也沒有引發(fā)主機SlowDown， CYL 故障報警時HCU記錄， CYL 正常時的HCU記錄,從中不難發(fā)現(xiàn)，排氣閥在關(guān)閉的過程中，Exhaust valve position Ch34探頭反饋路有一段跳幀，后來電機員檢查，進過包裹綁扎后，恢復(fù)正常。 CYL FIVA 閥功能測試時的HCU記錄，從該圖中我們可以看出，F(xiàn)IVA SET POINT及FIVA Controller Ch70有控制信號給出，但其它的執(zhí)行沒有相續(xù)體現(xiàn)， CCU沒有問題，問題很大程度在FIVA 閥，從后來的換完FIVA閥，主機恢復(fù)正常，也說明了這一點。對于換下的FIVA閥，因無技術(shù)支持，無法對其拆解，也就無法對其進行更深的探討。Sensor Chain Test流程圖（如上圖所示）`NOTE: (本文摘自MAN公司培訓(xùn)教材u盤/ME Engine Course/ Instruction_Manuals/ Vol 1 50108 ME/Page 476 倒數(shù)第三行)In the case that the control signal for the ELFI or FIVA valve is missing (
數(shù)學(xué)相關(guān)推薦
鄂ICP備17016276號-1