In this unit, diesel oil is used to cool, cooling circulating pump is driven by main engine, whilestand-by engine, inspect to ensure all valves in the system are in correct position, oil tank levelmust be inspected, if necessary, add diesel oil to the tank1.1.6 The operations of sea water cooling system while stand-by engineThis unite has high and low temperature sea water cooling system, each system has differentcooling object, two system can be substituted each other. High -temperature sea water coolingsystemusestocool M/Ecylinder-cooler,low-temperature sea water coolingsystem usestocoolthefollowingdevices:atmosphericcondenser、thecooleroftwo setsair compressor、thecoolerofreducing gear case、auxiliary engine's cooler、air cooler. Low-temperature sea water coolingsystem also suppliesworking water to hydraulicdynamometer.The diagram of sea water systemis shown in appendix1 fig.2,while stand-by engine.please inspect the flexibility of seawaterpump and all valves correctly open, power on frequency-conversion to prepare the controllablefrequency of high sea water pump1.1.7Main engine's turning、blowingand tryingBefore this operation,please inform bridge,after being allowed, this operation can be carried out.(l) The preparations: inspect and ensure that no blocks exist in shaft ofengine, inspect and ensureall adding points where need to add have been added, ensure all indicative cocks have beenopened.(2) Turning engine: pick up turning gear to rotate several rounds, inspect and ensure all are innormal conditions, and then disconnect the turning gear.(3)Blowing engine:unscrewtheprotective cap in the start controllingvalve,then push the rod inthe start controllingvalvemanuallytoblow engine, inspect indicative cocksto ensureno wasteoil、waterisblownout,afterensuringnormal,open theindicativecocks.(4)Start and test engine:inspect and ensureall preparations havebeenfinished, informbridge andthen start main engine, let engine run in idle speed, complete direction-changing operation bydirection-changing handle, let main engine run in low speed to ensure it runs normally, then theconversion switch of operational positionturns toremote position(E.C.RorBRIDGE),aftersuccessively starting and trying engine, please inform bridge that main engine has been ready andit has been in stopping condition of stand-by engine.2. The maneuvering operations for ship's propulsion unit.Maneuvering operations: operate main engine rapidly according to the orders from bridge, this isthe premise to ensure ship's safe.2.1 Thermal parameter's monitoring and adjusting: during maneuvering running, the load ofengine varies often andquickly,thermal parameters ofoil、water、gas、steam、electricity shouldbekept in normal range.All thermal parameters can be monitored in location through measuringmeter or inE.C.R through automatic alarm and monitoring equipment, if parameters are overnormal range,the alarm signal must begiven out automaticallyto inform dutyengineertoadjustthe parameters.2.2 The cooling water's temperature for cylinder liner is controlled and kept stability by adjustingthe revolutions of high temperature's sea water pump automatically through computer andfrequencyconversion.2.3The pressure of cooling water (fresh-water、sea water) is adjusted through the outlet valve ofcentrifugingpump2.4 The pressure of fuel oil、 lube oil is adjusted through pass-by valve or adjustable pressure
In this unit, diesel oil is used to cool, cooling circulating pump is driven by main engine, while stand-by engine, inspect to ensure all valves in the system are in correct position, oil tank level must be inspected, if necessary, add diesel oil to the tank . 1.1.6 The operations of sea water cooling system while stand-by engine This unite has high and low temperature sea water cooling system, each system has different cooling object, two system can be substituted each other. High -temperature sea water cooling system uses to cool M/E cylinder-cooler, low- temperature sea water cooling system uses to cool the following devices: atmospheric condenser、the cooler of two sets air compressor、the cooler of reducing gear case、auxiliary engine’s cooler、air cooler. Low-temperature sea water cooling system also supplies working water to hydraulic dynamometer. The diagram of sea water system is shown in appendix1 fig. 2, while stand-by engine, please inspect the flexibility of sea water pump and all valves correctly open, power on frequency-conversion to prepare the controllable frequency of high sea water pump. 1.1.7 Main engine’s turning、blowing and trying Before this operation, please inform bridge, after being allowed, this operation can be carried out. (1) The preparations: inspect and ensure that no blocks exist in shaft of engine, inspect and ensure all adding points where need to add have been added; ensure all indicative cocks have been opened. (2) Turning engine: pick up turning gear to rotate several rounds, inspect and ensure all are in normal conditions, and then disconnect the turning gear. (3) Blowing engine: unscrew the protective cap in the start controlling valve, then push the rod in the start controlling valve manually to blow engine, inspect indicative cocks to ensure no waste oil、water is blown out, after ensuring normal, open the indicative cocks. (4) Start and test engine: inspect and ensure all preparations have been finished; inform bridge and then start main engine, let engine run in idle speed; complete direction-changing operation by direction-changing handle, let main engine run in low speed to ensure it runs normally; then the conversion switch of operational position turns to remote position (E.C.R or BRIDGE), after successively starting and trying engine, please inform bridge that main engine has been ready and it has been in stopping condition of stand-by engine. 2. The maneuvering operations for ship’s propulsion unit. Maneuvering operations: operate main engine rapidly according to the orders from bridge, this is the premise to ensure ship’s safe. 2.1 Thermal parameter’s monitoring and adjusting: during maneuvering running, the load of engine varies often and quickly, thermal parameters of oil、water、gas、steam、electricity should be kept in normal range. All thermal parameters can be monitored in location through measuring meter or in E.C.R through automatic alarm and monitoring equipment, if parameters are over normal range, the alarm signal must be given out automatically to inform duty engineer to adjust the parameters. 2.2 The cooling water’s temperature for cylinder liner is controlled and kept stability by adjusting the revolutions of high temperature’s sea water pump automatically through computer and frequency conversion. 2.3 The pressure of cooling water (fresh-water、sea water) is adjusted through the outlet valve of centrifuging pump. 2.4 The pressure of fuel oil、lube oil is adjusted through pass-by valve or adjustable pressure
valve.2.5 The viscosity of fuel oil (temperature)is automatically controlled by viscosity meter oradjusted by passing steam manually.2.6 Lube oil temperature is automatically adjusted by constant-temperature valve or adjustedmanually, also adjusted through pass-by sea water.2.7 Scavenging temperature is adjusted through controlling cooling water to pass-by air cooler.3.The operations of changing fuel oil and the management after main engine's speed beingconstant.3.1Theoperationsofchangingfuel oilAlmost all main propulsive equipments should make the operations of changing fuel oil beforeentering harbor or after departure harbor, after departure harbor, the operations of changing fueloil must be operated according to the following:3.1.1Open steamvalveadequatelytoincreasetheenteringtemperatureofgas oilgradually3.1.2 When the entering temperature of gas oil meets to the requirement of changing oil, conversethe changing oil valve, then stop gas oil and supply heavy oil.3.1.3The equipment of fuel oil viscosity adjusting puts into use.3.1.4The steamvalve which iscontrolledbymanually shouldbe closed,and theviscositymaybeautomatically controlled by the equipment of fuel oil viscosity adjusting.3.1.5 After ensuring gas/heavy oil have been finished changing, please inform bridge.3.1.6 Shut off main start compressed air according to practice.3.2 The managements after main engine's speed being constant3.2.1The basic requirements of the managements after main engine's speed being constant: keepall serving system in normal condition,provide adequate oil、water、gas、steam、electricity toengine; Each working part is not leak and not abnormal sounds and vibration, all workingparameter are in best given value.3.2.2 At interval, inspect and record each running parameter according to circuit inspectionalroute,if anything is abnormal, settle them immediatelyThe contents of circuit inspection:() Liquid level's inspection: the level of expansive tank、fuel oil service (settling tank),lube oilcirculating tank、rocker case、governor、turbocharger、reducing gear case、water pool must beinspected,(2)Pressure inspections: the pressure of main engine lube oil、rocker lube oil、reducing gear caselube oil andworking oil、main engine cooling water、high temperature sea water、lowtemperaturesea water、fuel oil injector cooling oil、scavenging air、fuel oil inlet、controlling air、dynamometer's water、airbottle should beinspected(3)Temperatureinspection:thetemperatureof mainengine lubeoilmeasuringpoints、fresh-watercooling measuring points、oil injector cooling measuring points、scavenging air、exhaust gas、fuel oil system measuring points、lube oil of turbocharger、governor、reducing gear case lube oil、dynamometer.(4) Speed inspection: main engine's speed、turbocharger's speed.(5)Inspectwhetherthereisnotabnormalsound、smell、vibration、leakageornot.(6) Inspectall wastevalves,theplacewhere needs toadd lubeoil manually shouldbe added4. The operations ofFINISH WITH ENGINE" for ship's propulsion unit4.1Theoperations before“FINISH WITHENGINE
valve. 2.5 The viscosity of fuel oil (temperature) is automatically controlled by viscosity meter or adjusted by passing steam manually. 2.6 Lube oil temperature is automatically adjusted by constant-temperature valve or adjusted manually, also adjusted through pass-by sea water. 2.7 Scavenging temperature is adjusted through controlling cooling water to pass-by air cooler. 3. The operations of changing fuel oil and the management after main engine’s speed being constant. 3.1 The operations of changing fuel oil Almost all main propulsive equipments should make the operations of changing fuel oil before entering harbor or after departure harbor, after departure harbor, the operations of changing fuel oil must be operated according to the following: 3.1.1 Open steam valve adequately to increase the entering temperature of gas oil gradually. 3.1.2 When the entering temperature of gas oil meets to the requirement of changing oil, converse the changing oil valve, then stop gas oil and supply heavy oil. 3.1.3 The equipment of fuel oil viscosity adjusting puts into use. 3.1.4 The steam valve which is controlled by manually should be closed, and the viscosity may be automatically controlled by the equipment of fuel oil viscosity adjusting. 3.1.5 After ensuring gas/heavy oil have been finished changing, please inform bridge. 3.1.6 Shut off main start compressed air according to practice. 3.2 The managements after main engine’s speed being constant 3.2.1 The basic requirements of the managements after main engine’s speed being constant: keep all serving system in normal condition; provide adequate oil、water、gas、steam、electricity to engine；Each working part is not leak and not abnormal sounds and vibration; all working parameter are in best given value. 3.2.2 At interval, inspect and record each running parameter according to circuit inspectional route, if anything is abnormal, settle them immediately. The contents of circuit inspection: (1) Liquid level’s inspection: the level of expansive tank、fuel oil service（settling tank）、lube oil circulating tank、rocker case、governor、turbocharger、reducing gear case、water pool must be inspected. (2) Pressure inspections: the pressure of main engine lube oil、rocker lube oil、reducing gear case lube oil and working oil、main engine cooling water、high temperature sea water、low temperature sea water、fuel oil injector cooling oil、scavenging air、fuel oil inlet、controlling air、 dynamometer’s water、air bottle should be inspected. (3) Temperature inspection: the temperature of main engine lube oil measuring points、fresh-water cooling measuring points、oil injector cooling measuring points、scavenging air、exhaust gas、 fuel oil system measuring points、lube oil of turbocharger、governor、reducing gear case lube oil、 dynamometer. (4) Speed inspection: main engine’s speed、turbocharger’s speed. (5) Inspect whether there is not abnormal sound、smell、vibration、leakage or not. (6) Inspect all waste valves, the place where needs to add lube oil manually should be added. 4. The operations of “FINISH WITH ENGINE” for ship’s propulsion unit 4.1 The operations before “FINISH WITH ENGINE