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Gas-turbine bearing oil system with improved oil return arrangement

  • US 8,281,563 B2
  • Filed: 02/19/2009
  • Issued: 10/09/2012
  • Est. Priority Date: 02/19/2008
  • Status: Active Grant
First Claim
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1. A gas turbine bearing oil supply system, comprising:

  • at least one oil pump for supplying oil from an oil tank to a plurality of bearing chambers of a gas turbine;

    at least one scavenge pump unit for returning oil from the bearing chambers to the oil tank; and

    at least one additional electric scavenge pump for returning oil from at least one of the bearing chambers to the oil tank;

    a separate scavenge line connecting the at least one of the bearing chambers and the at least one additional electric scavenge pump, the separate scavenge line connecting to the at least one of the bearing chambers for evacuation of residual oil from the at least one of the bearing chambers;

    a shut-off device positioned in the separate scavenge line for selectively closing the separate scavenge line.

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