DEVICE TO CONTROL DELIVERY OF FUEL INTO COMBUSTION CHAMBER OF GAS-TURBINE ENGINE Russian patent published in 2006 - IPC F02C9/26 

FIELD: gas-turbine engines.

SUBSTANCE: invention relates to automatic control of gas-turbine engine and it can be used to control position of gaseous fuel cutoff valve in gas-turbine engine with simultaneous connection of said system with drainage. Proposed device contains cutoff arranged between inlet and outlet channels and spring-loaded relative to flange of outlet channel, and also filter and control valve. Inlet channel can be connected through filter and control valve either with spring space of cutoff valve, or with drainage. Device is furnished also with cutoff valve position indicator, electrohydraulic valve, electrohydraulic valve spool and channel to supply working liquid to electrohydraulic valve, and control and drain channel of electrohydraulic valve. Device is furnished with cutoff valve repeated opening interlock spool and drain valve installed in channel which can be connected with main line delivering gas to gas-turbine engine after gas meter and with drain main line of gas-turbine engine. Control and drain valves are installed by their rods on pistons arranged in cylinders being axially spring-loaded, and rodless spaces of their cylinders can be hydraulically connected, depending on position of electrohydraulic valve and spool of electrohydraulic valve, either with drainage or with working liquid delivery control channel. In this case, cutoff, valve repeated opening interlock spool is hydraulically connected with working liquid delivery main line, with control channel of electrohydraulic valve and, through spool of electrohydraulic valve, it can connect control channel of electrohydraulic valve with drainage.

EFFECT: prevention of unauthorized opening of cutoff valve at supply of corresponding signal to electrohydraulic valve when system contains working liquid.

1 dwg