METHOD OF CONTROL OF WORKING CYCLE OF HYDRAULIC PERCUSSIVE MACHINE Russian patent published in 2002 - IPC

FIELD: methods of control of pulse systems with hydraulic drives; applicable in mining and construction engineering in development and designing of percussive machines. SUBSTANCE: method consists in permanent connection of back stroke chamber to system consisting of source of fluid discharge and accumulator, and connection of forward stroke chamber with the help of hydraulic distributing device alternately to source of fluid discharge by signal of hammer upper position pickup or to drain into tank after delay of hammer before starting of back stroke and attaining in system of preset pressure value. Alternate connection of forward stroke chamber is effected by hydraulic distributor whose first control chamber is connected with source of fluid discharge, and the second one, with hammer upper position pickup. EFFECT: increased energy of impact, higher operating reliability and stability, higher power. 1 dwg