Control device for a dragline excavator

Registers – Transfer mechanism – Traveling pawl

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Details

37DIG1, 235151, E02F 346, G06G 748

Patent

active

039341267

ABSTRACT:
A control device for a dragline excavator, comprising hoist and drag rope length increment transducers and revolving platform swing angle transducers responding to the movement of a bucket from its breakout point on the face to the dumping point and from the dumping point to the point where the bucket is lowered onto the face, speed transducers for the bucket hoisting and dragging and revolving platform swinging mechanism, as well as a bucket transportation time calculator and speed setters for the bucket hoisting and dragging and platform swinging mechanisms, associated with said transducers. The device of the invention determines bucket travel times by measuring the hoist and drag rope length increments and the swing angle of the platform, in the presence of limitations on the speeds and accelerations, and then calculates and plots velocity diagrams for the bucket hoisting and dragging and platform swinging mechanisms.

REFERENCES:
patent: 3460278 (1969-08-01), Pesavento et al.
patent: 3636325 (1972-01-01), Chytil
patent: 3638211 (1972-01-01), Sanchez

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