FIELD: mechanical engineering; materials handling facilities.
SUBSTANCE: invention can be used in safeguards of boom lifting cranes. Proposed method provides for preliminary determination and storing of maximum tolerable value of load moment and determination on current value of moment by two methods in process of crane operation. Each method includes measuring working parameters of crane characterizing current load and current radius with subsequent calculation of current value of load moment. To generate warning signal or crane control signal, memorized maximum tolerable value of load moment is compared either with one of pre-calculated current values of load moment, or with maximum calculated value of two values. Current values of load moment obtained by first and second methods are compared additionally and if they differ crane control signal of formed.
EFFECT: provision of overload protection of load-lifting crane of any type, prevention of crane downtimes caused by frequent failures pf safety system.
16 cl, 1 dwg
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