US 11,732,650 B2
Gas turbine engine
Hiroshi Fujii, Kobe (JP); Takafumi Fujii, Kobe (JP); Tatsuya Okuwa, Kobe (JP); and Hikaru Maesato, Kobe (JP)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
Appl. No. 17/770,412
Filed by KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
PCT Filed Oct. 20, 2020, PCT No. PCT/JP2020/039455
§ 371(c)(1), (2) Date Apr. 20, 2022,
PCT Pub. No. WO2021/079891, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 2019-191929 (JP), filed on Oct. 21, 2019.
Prior Publication US 2022/0389869 A1, Dec. 8, 2022
Int. Cl. F02C 7/06 (2006.01); F01D 25/16 (2006.01); F01D 25/18 (2006.01)
CPC F02C 7/06 (2013.01) [F01D 25/16 (2013.01); F01D 25/18 (2013.01); F05D 2220/323 (2013.01); F05D 2240/50 (2013.01); F05D 2260/98 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A gas turbine engine in which a compressor, a combustor, and a turbine are arranged so as to be lined up along a rotating shaft,
the gas turbine engine comprising:
a casing accommodating the compressor, the combustor, and the turbine;
a bearing arranged inside the casing;
a main passage through which compressed air extracted from the compressor is guided to the bearing; and
an oil supply device that supplies oil to the main passage, wherein
the oil supply device includes
a pressure reducer that is disposed at the main passage and makes pressure in a downstream passage of the main passage lower than pressure in an upstream passage of the main passage, the downstream passage being a portion located downstream of the pressure reducer, the upstream passage being a portion located upstream of the pressure reducer,
an oil tank including a container and a divider that divides an internal space of the container into an oil chamber storing the oil and an air chamber, the divider being movable toward the oil chamber when pressure in the air chamber is higher than pressure in the oil chamber,
an extruder including a cylinder and a piston that divides an internal space of the cylinder into a first chamber and a second chamber,
a switching mechanism that switches between a first state and a second state, the first state being a state where the first chamber communicates with a low-pressure space whose pressure is lower than the pressure in the air chamber, and the second chamber communicates with the oil chamber, the second state being a state where the first chamber communicates with a high-pressure space whose pressure is higher than the pressure in the downstream passage, and the second chamber communicates with the downstream passage, and
a controller that controls the switching mechanism such that the switching mechanism switches between the first state and the second state.