GAS TURBINE ENGINE CONTROL SYSTEM Russian patent published in 2002 - IPC

FIELD: mechanical engineering. SUBSTANCE: system is designed for automatically controlling gas turbine engines. Invention is aimed at increasing reliability of systems, reducing pressure after pumping unit, improving static and dynamic characteristics with resulting improved reliability of engine in operation. System has pumping unit delivering fuel into engine, flow sensor and shutoff valve, all installed in fuel feed main line. Fuel feed control device is coupled by control channels with control elements of main and standby regulators through selector. Control elements are coupled with flow sensor. Moreover, control element is connected through spring with shifting mechanism made in form of servomotor and with position sensor. Control spaces of servomotor are connected with drain through electric valve of main regulator. Pressure from constant pressure valve is fed to control spaces through restrictors defining maximum shifting speed of mechanism. Selector control space is coupled with drain through regulator electromagnetic valve. Standby hydromechanical regulator has control element made in form of accumulator to inner space of which pressure P_k from sensor is fed through restrictor. Closed space accommodating accumulator communicates with drain through restrictor and with sensing element (diaphragm). Diaphragm is connected with spool whose throttling section is located in channel. Mode regulator and starting automatic control device are connected with diaphragm in operation. Channel accommodates throttling sections of valve of pressure drop across restrictor at change of mode and throttling sections of minimum flow rate valve. Owing to the fact that control elements coupled with fuel feed control device are connected with flow sensor, number of simultaneously operating control elements is reduced and transient processes both at operation of main regulator and at changing of system for operation of standby regulator with-out fuel rate overfeed and underfeed are improved. Moreover, additional limitations as to fuel consumption at pickup and drop of feed at operation of main regulator are provided owing to introduction of shifting mechanism with feed-back connected with control element through springs. EFFECT: improved connected with control element through spring; improved reliability of system and engine, reduced pressure behind pumping unit, improved static and dynamic characteristics. 5 cl, 2 dwg