Mining or in situ disintegration of hard material – Automatic control; signaling or indicating – Of hard material disintegrating machine
Patent
1980-08-15
1982-08-10
Purser, Ernest R.
Mining or in situ disintegration of hard material
Automatic control; signaling or indicating
Of hard material disintegrating machine
299 31, 299 75, E21D 908
Patent
active
043435122
ABSTRACT:
Apparatus is disclosed for regulating the capacity of a tunnelling machine. The tunnelling machine is of the type having a rotatable cutting head mounted at one end of an arm. The other end of the arm is pivotally mounted on a carrier about a pivot pin whose axis extends transversely to the axis of the arm. A hydraulic rotary drive is provided for rotating the arm about the axis of the tunnel being formed. The regulation apparatus includes a regulator for regulating the rotary drive of the arm in dependence upon the capacity of the cutting head drive. An angle/current transducer is provided for measuring the angle between the axes of the arm and the tunnel. The regulation apparatus is such that the capacity of the cutting head drive decreases as said angle decreases, the reduction in capacity being effected by a reduction in the force applied by the cutting head to the working face.
REFERENCES:
patent: 2136921 (1938-11-01), Joy
patent: 2795408 (1957-06-01), Goodrich
patent: 4136910 (1979-01-01), Plummer
patent: 4173836 (1979-11-01), Paurat
Dehmel Werner
Heitkamp Herbert
Gewerkschaft Eisenhutte Westfalia
Purser Ernest R.
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