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Recent content by pko

  1. pko

    Cylinder liner honing

    My experience with marine propulsion engines (medium speed diesels driving either generators or coupled to reduction gears), is that we typically limit ourselves to deglazing the liner and remove soot/carbon deposits in the headspace mechanically using honing brush on non-chromed liners...
  2. pko

    THRUST MEASUREMENT

    You can get instrumented (load cell) shoes for Kingsbury type thrust bearings. Was involved in a recent (1995) contract which required demonstration of thrust for acceptance purposes. The load cell was left in place and the leads disconnected, since there was no requirement for continuous...
  3. pko

    Propeller Inertia

    If you aren't doing it for a vibration analysis but a clutch load anlysis, wouldn't you be better off treating it as a damping factor, since it's velocity dependent? In either case, it's probably going to be easier to measure than it is to calculate. The energy absorbed by the water when the...
  4. pko

    Crankshaft Failures in Medium Speed Engines

    I had this happen to me on a 720 rpm 0.6MW DC generator in 1988. Crankshaft had ~50,000 operating hours. Inspection concluded it failed in high cycle fatigue. Some lateral misalignment existed (0.035" for a 160" crankshaft length) in the foundation which undoubtedly contributed. My...

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