FIELD: overload protection, controlling and regulation systems for hoisting cranes.
SUBSTANCE: method involves preliminarily determining and memorizing allowable loading values and diagnostic parameter values characterizing technical state of crane hydraulic system; during operation of crane, measuring and comparing loading and diagnostic parameter current values with allowable values; generating warning signal or blocking crane operation; additionally determining rotational velocity of pump shaft or power unit shaft of crane and velocity of crane lever or load-handling device and/or rotary platform of crane; determining current value of diagnostic parameter, with values of these velocities being taken into consideration. System for effectuating said method has digital calculator based on microcontroller, actuating device and operating parameters sensors for hoisting crane and its hydraulic system. Method and system provide for full, reliable and operative diagnosis of hydraulic system enabled owing to controlling of said system during operation of hoisting crane in dynamic modes under loading.
EFFECT: reduced consumption of power for accomplishment of hoisting operations by preventing crane from operation at low efficiency of hydraulic drive.
13 cl, 1 dwg
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