NewLubeSystems_0408

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Study for Future Lubricating Systemsfor Sulzer RTA/RT-flex Engines

M. Amoser

August 2004




Study for Future Lubricating Systems


Two systems are under evaluation at Wärtsilä Switzerland:

• Inner lubrication

• Pulse lubrication





New Lubrication Systems – Milestones


– Start on test engine 4RTX-3 in 2002Feed rate down to 0.5 g/kWh (0.36 g/bhph)

– Start on field test 6RTA58T in June 2003Feed rate reduction program startedcurrent value: 0.7 g/kWh (0.51 g/bhph)


– Start on test engine 4RTX-3 in June 2003Feed rate down to 0.5 g/kWh (0.36 g/bhph)

–

Start on field test 6RTA58T in July 2004Feed rate reduction program startedTarget: 0.6 g/kWh (0.44 g/bhph)

– Rig test for RTA/-flex96C engine successful


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Working Principle

• Lube oil distribution throughpiston

• Controlled external timing

• Lube oil is feed where needed

(next to piston rings)

• Same pump as the standardlubricating system (CLU-3)

Inner Lubrication



Inner Lubrication

through piston headpipe through piston rodlever«Solenoid» valveOne pipe per cylinderCLU3



Pulse Jet Lubrication

Working Principle

• New lubricator pump

• Electronically controlled timing with fullflexibility of timing point

• Electronically controlled feed rate

• Oil distribution by a series of compact jets, no atomization, no loss of oil inscavenge air, no external leakage

• Precise dosage even for low feed

rates• Reliable oil quills (simple non return

valves)





New Lubricator Pump

• Forced metering of the lubricant forconstant spray patterns

• No special requirements for thelubricating oil

• Driven by pressurized system oil

• Electronically controlled by solenoidvalve





RTX3 engine test, sketch of oil distribution





RTX3 engine test, picture of oil distribution





Rig Test for RTA/-flex96CTest made to check oil jet propagation for liner diameter 960

1 Oil quill

2 Groove for jet propagation

3 Equal distribution of lube oil





Configuration for RTA/-flex96C

• 8 quills

• 5 oil jets per quill

• Total of 40 lubricatingpoints on the linersurface

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