PNEUMATIC CYLINDER OF GAS-TURBINE ENGINE PROPELLING NOZZLE ACTUATOR Russian patent published in 1999 - IPC

FIELD: aircraft gas-turbine engines operating under single-ended high-temperature conditions. SUBSTANCE: with pneumatic cylinder operating , air is admitted to its rod space. Air passed through sealing rings of piston and then through holes providing communication between no-rod space and cooling space inlet cools down casing and is discharged outside through holes. Hottest part of casing that faces propelling nozzle axis is cooled down most intensively so that peripheral temperature difference is reduced ensuring better roundness and rectilinearity of cylinder casing. EFFECT: reduces difference in casing temperature and, consequently, improved operating reliability of pneumatic cylinder. 3 cl, 2 dwg