DIGITAL THROTTLING VALVE Russian patent published in 2002 - IPC

FIELD: automatic hydraulic machinery installed in liquid or gas main lines of power plants. SUBSTANCE: invention refers to systems controlling and adjusting liquid-propellant rocket engines. Digital throttling valve has inlet and outlet spaces separated by partition. Partition is provided with flow ducts with throttling holes and seats for gates of actuating valves which control pilot valves. Gates are sealed for motion in body and are located in its peripheral parts around longitudinal axes of digital throttling valve which carries electromagnets each controlling corresponding pilot valve. Salient feature of invention lies in fact that movable parts of pilot and actuating valves ( that is, their gates ) are kinematically independent one from another. Each pilot valve has two command spaces, one communicating with drain and another with internal ( for instance, inlet ) space of digital throttling valve. Outlet of pilot valve communicates with controlling space of actuating valve. Gate of actuating valve comes in the form of stepped piston branch pipe and each actuating valve is fitted with blank flange. EFFECT: such make of digital throttling valve allows fast change of hydraulic pressure to be secured as well as pressure differential in it, increased adaptability to manufacture, simplified design of valve. 5 cl, 3 dwg