JET-TYPE HYDRAULIC POWER AMPLIFIER Russian patent published in 2001 - IPC

FIELD: hydraulic automatic control systems; hydraulic distributing and pressure control units. SUBSTANCE: jet-type power amplifier has movable jet member and distributing plate arranged in housing; distributing plate is made in form of two parts located in way of motion of flow with coaxial inlet passages; additional cavity for receiving return flows which is located between first and second parts of plate and is communicated with return flow receiving chamber by means of passages. One of receiving passages of plate is blank off at amplifier housing outlet and is brought into communication with return cavity of housing by means of bypass passage. One of receiving passages of plate may be blanked off in the following versions: in first part of plate in way of motion of flow; in first part of plate in way of motion of flow and at outlet of amplifier housing; in first and second parts of plate; at passage outlet by means of adapter plate or may be shut-off by means of cock. EFFECT: increased service life of amplifier. 8 cl, 1 dwg