船用柴油机6RTA58T-B

14
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
Camshaft drive
Fuel pump / actuator pumps
15
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
6RTA58T-B
Introduction
1
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
6RTA58T-B
2
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
Comparison RTAx8T-B engines
19
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
Function of fuel injection pump
•
A fuel pump with valve control is a camshaft driven plunger 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 rotated by the VIT-Cylinder The spill valve shaft is rotated by the electric fuel pump actuator
Camshaft section Reversing servo motor, drw Actuator cam Oil trough for pump housing
Fuel cam
16 © Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
RTA/RT-flex58T-D Bore (mm) Stroke (mm) S/B ratio MCR-speed (rpm) MCR-power (kW/cyl) 580 2,416 4.17 105 2,260 S60MC-C7/ME-C7 600 2,400 4 105 2,260
- 5 cyl (kW)
- 6 cyl
- 7 cyl - 8 cyl B C D E F G Engine weight (t) - 5 cyl - 6 cyl - 7 cyl - 8 cyl
6
7,387
8,393 9,399 3,820 1,300 8,810 3,475 10,880 2,000
8,142
9,162 10,182 3,770 1,300 ? ? 10,725 ?
281 322 377 418
314 / 295 358 / 337 410 / 385 467 / 439
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
RTA/RT-flex-8T - Engines in Service
RTA48T / T-B Engines in operation Engines on order RTA58T / T-B Engines in operation Engines on order
3
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
Wärtsilä low-speed engine portfolio
4
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
Engine data – RTA/RT-flex58T-D
RTA/RT-flex-8TD - Piston rod gland box
Piston rod gland box
– 2 highly efficient pre-scraper rings to remove dirt and remain with clean 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 cylinder and day – Running in RT-flex60C and RTA84CU
Actuator LI transmitter Fuel pumps
•
•
• •
Suction valve excentric shaft Spill valve excentric shaft
11,300
13,560 15,820 18,080 19 8.4 170 167.9 167.3
5
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
Engine dimensions – RTA/RT-flex58T-D
RTA RT-flex58T-D A+K - 5 cyl 6,381 7,122 S60MC-C7 ME-C7
Fuel pump / Actuator pump
Safety cut-out device
Injection pump block
Intermediate piece
Excentric shaft, spill valves Rollerguide fuelpump Housing with camshaft bearings Rollerguide actuator pump
RTA68-B Engines in operation Engines on order Status: November 2007
7 © Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
T 122 0 T 74 11
T-B 61 92 T-B 15 4
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
RTA/RT-flex-8TD -
Big end bearing
13
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
RTA/RT-flex-8TD - Main bearing
8 © Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
RTA/RT-flex-8TD - Combustion chamber
Combustion chamber • Bore cooled components
• • • • Piston Cylinder liner Cylinder cover Exhaust valve seat
Housing with camshaft bearings
Fuel cam
Camshaft section Oil trough, pump housing
18 © Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
Injection piping layout
Spill valve Valve pushrod Pump plunger Regulating tappet Control lever Spill valve shaft
Rollerguide injection pump Roller
Cut out device for injection pump
Fuel cam
Fuel pump / Actuator pump
Coupling
Excentric shaft, suction valves
Coupling
Excentric shaft, spill valves
17
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
RTA/RT-flex-8TD - Piston rod gland box
Piston rod gland box
– Gland box can be dismantled up- and downwards
10
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
-B 9ቤተ መጻሕፍቲ ባይዱ9
flex 11 25
flex 2 12
RTA/RT-flex-8TD - Piston running TriboPack
TriboPack
Liner Insulation Anti- polishing Ring Cr-ceramic pre-profiled Top Piston Ring
Fuel pump / Actuator pump
Safety cut out device Injection pump block Delivery valve
Relief valve Suction valve Valve pushrod Intermediate housing Drip shield Regulating tappet Control lever Excentric shaft suction valves
Multilevel Lubrication* Lower rings pre-profiled and RC-coated Mid-stroke Insulation Liner fully deep honed Thick chromium layer
*) RTA68-D with PULSE Cyl. Lubrication on upper level only
11
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher
RTA/RT-flex-8TD - Crosshead
•
longer guide plate for improved guide shoe support at BDC
•
12
Improved chamfering
- 6 cyl (kW) - 7 cyl (kW) - 8 cyl (kW) mep (bar) cm (m/s) BSFC (g/kWh) at CMCR - 100% load - 90% load - 85% load
11,300
13,560 15,820 18,080 20.2 8.5 170 166.6 166
• Exhaust valve spindle is made of Nimonic 80A • Grey cast valve cage, water cooled • Two level cyl. lubrication • Anti polishing ring
9
© Wärtsilä 16 August 2016 HHM RTA Training / A. Spicher