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Gas turbine oil supply system and method for the operation of a bearing oil supply system for a gas turbine

  • US 8,887,869 B2
  • Filed: 12/08/2008
  • Issued: 11/18/2014
  • Est. Priority Date: 12/07/2007
  • Status: Active Grant
First Claim
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1. A method for the operation of a bearing oil supply system for a gas turbine, comprising:

  • providing an electric oil pump in a supply line connected to an oil tank;

    providing a first controllable valve downstream of the oil pump through which oil can be selectively directed to the bearings and to the oil tank via a return line;

    determining an oil temperature in the oil tank;

    comparing the determined oil temperature with a specified oil temperature at which the gas turbine can be safely started;

    when the determined oil temperature is below the specified oil temperature, placing the oil supply system in a recirculation mode by activating the electric oil pump and also activating the first controllable valve to simultaneously divert oil from the bearings while recirculating the oil into the oil tank via the return line;

    wherein, the electric oil pump is activated separately from rotation of the gas turbine such that the oil supply is recirculated while the gas turbine is not rotating;

    wherein the placing the oil supply system in a recirculation mode by activating the electric oil pump and also activating the first controllable valve to simultaneously divert oil from the bearings while recirculating the oil into the oil tank via the return line is performed prior to starting the gas turbine and while the gas turbine is not rotating,and also prior to starting the gas turbine and while the gas turbine is not rotating, recirculating the oil with the electric oil pump until the oil temperature has increased to the specified oil temperature.

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