STEAM INTAKE OF STEAM TURBINE Russian patent published in 2003 - IPC

FIELD: mechanical engineering; steam turbines. SUBSTANCE: proposed steam intake of steam turbine contains two identical steam-distributing devices arranged symmetrically relative to turbine housing and connected by steam lines to intake branch pipes of common nozzle chamber of turbine. Each steam- distributing device is made in form of turnable control gate and is furnished with quick-acting turnable clack valve installed coaxially before gate. Each clack valve and gate is provided with movable box, spring-loaded cutoff spool whose spring-loaded end forms closed chamber in box bore, and locking spool and servomotor connected by lever with drive shaft of gate or clack and by feedback lever, with box. Working spaces of servomotors are connected to high-and low- pressure oil lines through inter-piston spaces of cutoff spools. Closed chambers are connected directly to oil line of turbine protection system and are connected through inter-pistons spaces of locking spools. Inter-piston space of clack valve locking spool is connected through inter-piston space of gate locking spool to oil line of turbine protection system. Steam- distributing devices are installed on flexible supports. EFFECT: increased reliability and provision of minimum hydraulic resistance of steam intake. 2 cl, 2 dwg