船用柴油机6RTA58T-B

1、16RTA58T-BIntroduction26RTA58T-B3Comparison RTAx8T-B engines4Wrtsil low-speed engine portfolio5RTA/RT-flex58T-DS60MC-C7/ME-C7Bore (mm)580600Stroke (mm)2,4162,400S/B ratio4.174MCR-speed (rpm)105105MCR-power (kW/cyl)2,2602,260- 5 cyl (kW)11,30011,300- 6 cyl (kW)13,56013,560- 7 cyl (kW)15,82015,820- 8

2、cyl (kW)18,08018,080mep (bar)20.219cm (m/s)8.58.4BSFC (g/kWh) at CMCR - 100% load- 90% load- 85% load170166.6 166170 167.9 167.3Engine data RTA/RT-flex58T-D6RTART-flex58T-DS60MC-C7ME-C7A + K- 5 cyl6,3817,122- 6 cyl7,3878,142- 7 cyl8,3939,162- 8 cyl9,39910,182B3,8203,770C1,3001,300D8,810?E3,475?F10,8

3、8010,725G2,000?Engine weight (t)- 5 cyl 281314 / 295- 6 cyl322358 / 337- 7 cyl377410 / 385- 8 cyl418467 / 439Engine dimensions RTA/RT-flex58T-D7RTA48T / T-B TT-BEngines in operation122 61Engines on order 0 92RTA58T / T-B TT-BflexEngines in operation74 1511Engines on order 11 425RTA68-B -BflexEngines

4、 in operation 9 2Engines on order 912Status: November 2007RTA/RT-flex-8T - Engines in Service8TriboPackCr-ceramicpre-profiled Top Piston RingMultilevelLubrication*Liner fully deephonedMid-stroke InsulationLower rings pre-profiled and RC-coatedThick chromium layerAnti- polishingRingLinerInsulationRTA

5、/RT-flex-8TD - Piston running TriboPack *) RTA68-D with PULSE Cyl. Lubrication on upper level only9Combustion chamber Bore cooled components Piston Cylinder liner Cylinder cover Exhaust valve seat Exhaust valve spindle is made of Nimonic 80A Grey cast valve cage, water cooled Two level cyl. lubricat

6、ion Anti polishing ringRTA/RT-flex-8TD - Combustion chamber 10RTA/RT-flex-8TD - Piston rod gland boxPiston rod gland box Gland box can be dismantled up- and downwards11RTA/RT-flex-8TD - Piston rod gland boxPiston rod gland box 2 highly efficient pre-scraper rings to remove dirt and remain with clean

7、 system oil 2 gastight sealing rings 6 highly efficient oil scraper rings with grey cast iron lips High contact pressure between oil scraper rings and hard piston rod Big oil drain area to re-circulate system oil Quasi-zero leakage to neutral space System oil consumption expected less than 6 kg per

8、cylinder and day Running in RT-flex60C and RTA84CU12RTA/RT-flex-8TD - Crossheadlonger guide plate for improved guide shoe support at BDCImproved chamfering13RTA/RT-flex-8TD - Big end bearing14RTA/RT-flex-8TD - Main bearing15Camshaft driveFuel pump / actuator pumps16Fuel pump / Actuator pumpSafety cu

9、t-out deviceInjection pump blockIntermediate pieceExcentric shaft, spill valvesHousing with camshaft bearingsReversing servo motor, drwOil trough for pump housingFuel camFuel camActuator camCamshaft sectionRollerguide actuator pumpRollerguide fuelpump17Fuel pump / Actuator pumpExcentric shaft,suctio

10、n valvesExcentric shaft,spill valvesCouplingCoupling18Fuel pump / Actuator pumpInjection pump blockDelivery valveSpill valveValve pushrodPump plungerRegulating tappetControl leverSpill valve shaftCut out device for injection pumpFuel camOil trough, pump housingCamshaft sectionHousing with camshaft b

11、earingsRollerRollerguide injection pumpExcentric shaft suction valvesControl leverRegulating tappetDrip shieldIntermediate housingValve pushrodSuction valveRelief valveSafety cut out device19Injection piping layout20Function of fuel injection pumpA fuel pump with valve control is a camshaft driven p

12、lunger pump, which fuel quantity to the injectors is controlled by valves. The suction valve controls the timing while the spill valve controls the quantity. To change the injected fuel amount, the spill valve or suction valve position is controlled by excentric shafts.The suction valve shaft is rot

13、ated by the VIT-CylinderThe spill valve shaft is rotated by the electric fuel pump actuatorSuction valve excentric shaftSpill valve excentric shaftVIT-Cyl.Fuel pumpsLI transmitterActuatorCam shaft21Working Principle of Fuel Pump No delivery Begin of delivery End of delivery 22Function of fuel inject

14、ion pump23Function and Effect of SPCVDelivery valveinjection nozzlesuction valvespill valveSPCVSpill valve opens1Injection valve closes23Pressure wave created by theclosing shock of inj. valve isbeing released by SPCV 20 barCAwithout SPCV320 bar170 bar100 baropening press.of fuel oil valvestagnation

15、 pressure without SPCVstagnation pressure with SPCVSPCV openspossibleafter injection123Function of SPCV Effect of SPCV 24Delivery Curve100 %75 %50 %25 %100 %75 %50 %25 %CRANK ANGLETDCAngle of delivery (100%)END OF DELIVERYat power of:COMMENCEMENT OF DELIVERYat power of:25Reducing the power on indivi

16、dual Cylinders Spill26Working Principle of Fuel Pump 27Working Principle of Fuel Pump 28Working Principle of Fuel Pump Suction Valve Control Lever and Push Rod29Working Principle of Fuel Pump Spill Valve Control Lever and Push Rod30Working Principle of Fuel Pump Suction Valve and Spill Valve closed

17、- Injection 31Exhaust valve piping32Exhaust valve piping33Exhaust valve / actuator pump34Function of exhaust valveOil supplyNon return valveRelief valveActuator pistonValve drive pistonAir springConstant orificeActuator cam lifts the rollerguide and actuator piston35Control unitsInjection regulating

18、 linkageElectrical fuelpump actuatorControl box,Local manoeuvering standStarting air distributorLocal manoeuvering standPneumatic logic unitRotation direction safeguardReversing valveControl air supplyValve unit, reversing interlockVIT cylinder36Control unitsInstrument panelLocal manoeuvering standP

19、neumatic logic unitSpeed pick-upsReversing valveControl air supplyRotation direction safeguardStarting air distributorLoad indicator transmitterSpeed indication driveRevolution counter37Control units, start air distributor Activates cyl. cover start valves acc. to firing order Adjustment see chapter

20、 “adjustments on engines” Pipe connections to start valves must correspond to diagram on the right side Working principle diagram38Control units, rotation direction safeguard Makes sure that injection is blocked when fuelpumps not in correct position (ahead / astern) 107.313.848 Function diagram 107

21、.311.455 Drawing39Control units, reversing valve Enabling the crosshead oil supply to the reversing servo motors - reversing the fuel pumps to ahead or astern Activated by the pneumatic logic unitControl air supplyOil for reversing servo motors 40Control units, reversing interlock valve Blocking of

22、injection as long as reversing servo motor is not in proper end-position41Control units, VIT cylinder42Control units, VIT cylinder Rotating of suction valve shaft to change the injection begin timing Position command from RCS according to charge air pressure and speed dependent injection timing43Con

23、trol units, pneumatic logic unit Pressure switch for “fuel 0 order” to remote control system when injection should be inhibited Emergency stop solenoid valve OR-valves44Control units, Local manoeuvering stand45Control units, Local manoeuvering stand Local manoeuvering commands Local load indicator s

24、election Remote activation of start, ahead, astern Control transfer switches (if one switch open, control take over from RCS not possible)46Control units, misc.Revolution counterSpeed indication drive47Differences RTA RT-flex48 Differences RTA to RT-flex engines107.313.590 “Control units”49Compariso

25、n RTA vs. RT-flexFunctionRTART-flexDeveloping fuel injection pressureOne fuel pump per cylinderFuel pumps on supply unitStoring“ of fuel oil pressure-Fuel railTiming of injectionFuel cam on camshaftWECS-9520 / ICUDeveloping pressure for exhaust valve activationOne activating pump per cylinderServo p

26、umps on supply unitStoring“ of servo oil pressure-Servo railTiming of exhaust valve activationValve cam on camshaftWECS-9520 / VCUFuel pump actuatorRegulating power/speedKeeping fuel rail pressureReversingReversing of camWECS-9520Timing of starting air Starting air distributorWECS-9520Alarm and monitoring systemExternal (internal: OSC-3)ExternalWiring from engine to externalIndividual cablesBus-systemElectronic governorReleasing fuel pump position to the actuatorReleasing fuel command to WECS50Comparison RTA vs. RT-flexDENIS 9, 9520 RT-flexManoeuvring SignalsStart, Ahead, Astern,