AXIAL PISTON PUMP Russian patent published in 2002 - IPC

FIELD: mechanical engineering; aircraft hydraulic systems. SUBSTANCE: with servopiston moved to reduce pump delivery, angle of tilting of inclined plate decreases and simultaneously length of clearance L-between additional space and end face of servopiston increases. Simultaneously rate of liquid flow from working space of servopiston decreases which leads to decrease in pressure drop across spool and, as a result, pressure in delivery line decreases with decrease in pump delivery. EFFECT: reduced working pressure at long operation of pump with low deliveries, reduced operating temperature range, increased service life and improved reliability of pump and hydraulic system as a whole. 3 dwg