초록 ▼

Cooling air to the 1-2 turbine stage seal is supplied in parallel with air to the second vane surface from a plenum. A modulatable valve in the supply line to the plenum regulates air flow in response to a sensed temperature in the 1-2 seal area. A thermocouple is located in a bypass around a portio

Cooling air to the 1-2 turbine stage seal is supplied in parallel with air to the second vane surface from a plenum. A modulatable valve in the supply line to the plenum regulates air flow in response to a sensed temperature in the 1-2 seal area. A thermocouple is located in a bypass around a portion of the seal, being radially installed through a hollow vane and an opening in the seal shroud.

대표청구항 ▼

In an axial flow gas turbine engine having an annular flow of hot working fluid passing sequentially through a first bladed rotor stage, a vaned stator assembly having a plurality of hollow vanes, and a second bladed rotor stage; a flow resistant labyrinth seal comprised of an annular seal runner se

In an axial flow gas turbine engine having an annular flow of hot working fluid passing sequentially through a first bladed rotor stage, a vaned stator assembly having a plurality of hollow vanes, and a second bladed rotor stage; a flow resistant labyrinth seal comprised of an annular seal runner sealingly secured to said first and second rotor stages and a seal shroud surrounding and secured to said vaned stator assembly in closely spaced relationship to said seal runner, forming a labyrinth low passage therebetween; an upstream plenum in restricted fluid communication with said annular flow upstream of said vaned stator assembly and with said labyrinth flow passage; a downstream plenum in fluid communication with said labyrinth flow passage and in restricted flow communication with said annular flow downstream said vaned stator assembly; a compressor; a conduit network connected to deliver air from said compressor to said upstream plenum, the improvement comprising: a bypass opening through said seal shroud in fluid communication with a location between the inlet and the outlet of said labyrinth flow passage and with said downstream plenum; and a modulatable control valve means located in said conduit network; a fluid temperature sensor located in said bypass opening; and said modulatable control valve responsive to said fluid temperature sensor.