DEVICE FOR CONTROL OF DRAGLINE EXCAVATOR IMPLEMENT Russian patent published in 2008 - IPC E02F3/48 E02F9/20 

FIELD: mining industry.

SUBSTANCE: present invention relates to the mining industry and may be used for the control of dragline excavator implement during excavation. For this purpose, the device has lifting and pulling hoist motors controlled by speed control units of these motors, a lifting cable (LC) tension controller with the first input connected to the output of the LC tension selector, the second input connected to the output of the LC tension transducer, and the third input connected to the outputs of the main and two additional functional generators (FG) through switches. The controller output is connected to the input of the lifting hoist speed control unit. A signal from the pulling cable tension transducer is supplied to the FG inputs. The switches are controlled through a non-linear element with the inputs connected to the output of selector 1 and an excavation path transducer, and the output connected to the switch control inputs through diodes. The actuating contacts of these switches are connected into circuits switching one of the FG's to the third input of the LC tension controller.

EFFECT: increased capacity, reliability, and service life duration of dragline excavator due to adjusting lifting cable (LC) tension value in case of change of cut and soil hardness conditions.

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