JET TYPE HYDRAULIC POWER AMPLIFIER Russian patent published in 2000 - IPC

FIELD: hydraulic distributing devices for hydraulic automatic control systems. SUBSTANCE: amplifier has sectional housing where nozzle, movable jet tube and plate with two intake passages are mounted. Nozzle has contraction inlet section, cylindrical intermediate section and contraction outlet section. Movable jet tube is provided with passage of permanent section and is mounted coaxially relative to nozzle at spaced relation to exit section. Jet tube is connected with drive motor and is mounted for reciprocating relative to it; axis of rotation is made closer to inlet hole of jet tube. High-velocity jet of liquid enters passage of permanent section of movable jet tube where velocities of flow are equalized in section and flow is made stable. Self-oscillations of jet tube are excluded. EFFECT: enhanced hydrodynamic stability of hydraulic amplifier due to reduction of vibrations and self-oscillations of jet tube, thus reducing control signal and consequently increasing power amplification factor and output power of amplifier. 7 cl, 1 dwg