Oil supply device of aircraft gas turbine
An oil supply device of an aircraft gas turbine includes: a lubrication extraction pipe including a first end and a second end, the first end communicating with a compressor of the gas turbine, an ejection port being provided at the second end and directed to a lubricated member; an oil tank configured to store oil; an oil pipe including a first end and a second end, the first end communicating with the oil tank, the second end communicating with the lubrication extraction pipe; and an electric pump interposed on a portion of the oil pipe and configured to suck the oil from the oil tank and supply the oil to an inside of the lubrication extraction pipe.
1. An oil supply device configured to supply oil to a lubricated member of a gas turbine,
the oil supply device comprising:
a lubrication extraction pipe including a first end and a second end, the first end communicating with a compressor of the gas turbine, an ejection port being provided at the second end and directed to the lubricated member;
an oil tank configured to store the oil;
an oil pipe including a first end and a second end, the first end communicating with the oil tank, the second end communicating with the lubrication extraction pipe; and
an electric pump interposed on a portion of the oil pipe and configured to suck the oil from the oil tank and supply the oil to an inside of the lubrication extraction pipe.
2. The oil supply device according to claim 1 , further comprising a pressurizing mechanism, wherein:
the oil tank includes a movable body defining an oil chamber configured to store the oil, the movable body being displaceable so as to change volume of the oil chamber; and
the pressurizing mechanism pushes the movable body in such a direction that the volume of the oil chamber decreases.
3. The oil supply device according to claim 2 , wherein:
the oil tank further includes an air chamber which is separated from the oil chamber by the movable body;
the pressurizing mechanism includes a tank extraction pipe including a first end and a second end, the first end communicating with the compressor, the second end communicating with the air chamber; and
the pressurizing mechanism applies pressure of extracted air to the movable body from the air chamber side.
4. The oil supply device according to claim 1 , further comprising a heat exchange mechanism configured to cool the lubrication extraction pipe, wherein
the heat exchange mechanism includes:
an outside air pipe through which outside air flows;
a heat exchanger configured to perform heat exchange between the outside air pipe and the lubrication extraction pipe; and
an outside air suction extraction pipe including a first end and a second end, the first end communicating with the compressor, the second end communicating with the outside air pipe at a downstream side of the heat exchanger.
5. The oil supply device according to claim 1 , wherein the electric pump is a metering pump.
6. The oil supply device according to claim 1 , wherein:
the lubricated member includes a bearing rotatably supporting a rotating shaft of the gas turbine; and
a connection portion of the oil pipe connected to the lubrication extraction pipe is arranged at a downstream side of the compressor in an axial direction of the rotating shaft and a radially outer side of a turbine of the gas turbine.
7. The oil supply device according to claim 1 , wherein the electric pump is arranged at an upstream side of a combustor of the gas turbine.