Oil system of a gas turbine engine, comprising a first oil circuit and at least one second oil circuit, and gas turbine engine

An oil system of a gas turbine engine, comprising:

• a first oil circuit and
• a second oil circuit,
• wherein, via the first and second oil circuits, a hydraulic consumer of a transmission of the gas turbine engine is charged with oil,
• wherein oil is introduced from the transmission into the first and second oil circuits downstream of the hydraulic consumer in a region of a return of the transmission and is introduced into the transmission from the first and second oil circuits upstream of the hydraulic consumer in a region of inlets to the transmission, and
• wherein the second oil circuit includes an oil accumulator between the return of the transmission and an inlet of the second oil circuit, said oil accumulator being configured such that oil is stored in the oil accumulator depending on a supply pressure of the oil upstream of the inlet of the second oil circuit or oil stored in the oil accumulator is guided in a direction of the inlet of the second oil circuit;
• wherein the oil accumulator is configured as a spring accumulator including a spring, and a piston and cylinder of a cylinder-piston unit, the piston being arranged in a longitudinally displaceable manner in the cylinder and being cushioned against the supply pressure acting in the second oil circuit by the spring;
• wherein the piston and the cylinder delimit an oil storage chamber, a volume of which varies depending on an axial position of the piston in the cylinder, wherein oil is introduced into the oil storage chamber by the supply pressure in a region downstream of the return of the transmission and upstream of the inlet of the second oil circuit counter to the spring force;
• wherein the piston and the cylinder further delimit a piston chamber, containing the spring, on an opposite side of the piston from the oil storage chamber;
• wherein an only flow of oil to the piston chamber occurs via flow from the oil storage chamber past the piston;
• wherein oil is guided from the piston chamber in a direction of a substantially pressure-free region of the oil system.