GAS-TURBINE ENGINE AUTOMATIC CONTROL SYSTEM Russian patent published in 1999 - IPC

FIELD: mechanical engineering; engines. SUBSTANCE: system is designed for automatic control of gas-turbine engine, particularly, for delivering of fuel into engine combustion chamber at pickup when there is no short over temperature on turbine blades. System has additionally throttling pack and pickup valve which are arranged successively between control channel and static member and are coupled through the latter with control space of metering valve. Pickup valve is coupled directly with space valve. Size of step of spool valve at spring side is greater than size of step opposite to spring. End face of this step is directly coupled with space after metering valve. Groove made in larger diameter step connects control channel through additional throttling pack and static member with control space of metering valve servopiston at commencement of pickup and cuts off this channel at end of pickup. Smaller diameter step made separately from larger diameter step of spool valve is essentially a rod one end of which is hydraulically coupled with space after metering valve, and other end is directly coupled with end face of large diameter step of spool valve. EFFECT: enlarged operating capabilities and enhanced reliability. 3 cl, 1 dwg