OIL SYSTEM OF GAS-TURBINE ENGINE Russian patent published in 2006 - IPC F02C7/06 

FIELD: mechanical engineering; power-generating plants.

SUBSTANCE: invention relates to devices used for delivery of oil bearings of rotors of gas-turbine drives of power-generating plants. Design peculiarity of gas-turbine plan with free turbine used for driving power generators is long-time rotation of rotor of said turbine exceeding 20-30 min after switching off engine gas generator. To provided lubrication of free turbine rotor bearings in process of runout, hydraulic accumulator is included into processed oil system. Said hydraulic accumulator is connected in parallel with oil feed line from pressure set into operation from rotor of gas generator to nozzles of free turbine bearings. Space of set is filled with oil from feed main line of oil system. Oil delivery to bearings is provided at operating duties by-passing hydraulic accumulator. Supply of metered out amount of oil to turbine bearings after switching off of engine is provided owing to hydrostatic head. For this purpose device is arranged higher than level of oil space of free turbine, and jet is installed in channel connecting device with nozzles of said turbine to limit delivery of oil. Such manner of connection of hydraulic accumulator into oil system of gas-turbine engine provides lubrication of bearings of said turbine in process of long-time runout of rotor at compact design of device.

EFFECT: provision of reliable lubrication of rotor bearings.

1 dwg