PROPORTIONAL HYDRAULIC ROTARY CONTROL VALVE WITH FEEDBACK Russian patent published in 2012 - IPC F15B13/04 F15B9/02 

FIELD: transport.

SUBSTANCE: proposed control valve is intended for river vessel rudder control. Control valve comprises body with channels communicated with pressure, drain and in-chamber hydraulic lines. Body bore accommodates sleeve with feedback link and slide valve arranged to rotate relative to each other and said body. Slide valve two beads have lengthwise grooves in permanent communication with feed and drain lines and is pin-jointed to input link shaft. Said shaft carries travel limiting mechanism and return spring. Pressure line is equipped with filters while in-chamber lines are furnished with two-way hydraulic lock. Note here that feedback link shaft and sleeve are equipped with mechanical feedback with actuator to track input link shaft speed and angle.

EFFECT: higher reliability.

4 dwg