CONTROL DEVICE FOR DRAG-LINE EXCAVATOR IMPLEMENT OPERATION Russian patent published in 2006 - IPC E02F9/20 

FIELD: mining industry, particularly component parts of dredgers or soil-shifting machines.

SUBSTANCE: device comprises sensor and set unit, which sets lifting cable tension. The sensor and set unit are connected to lifting cable tension regulator, which form signal to maintain minimal tension thereof. Device also has manual setting means, which sets lifting winch drive speed. Outputs of manual setting means and lifting cable tension regulator are linked to the first and the second inputs of unit, which generates maximal drive control signal. Output of above unit is connected with input of drive speed regulation unit through lifting cable limiting unit controllable by output signal of tension cable sensor. Device comprises serially connected haulage cable tension sensor and functional sensor signal generator. The device includes regulator, which corrects lifting cable tension. Outputs of functional generator and lifting cable tension sensor are linked to inputs of above regulator. Lifting cable tension correcting regulator output is connected with the third input of unit, which generates maximal lifting winch drive control signal.

EFFECT: increased reliability and service life.

1 dwg