Mining machine with cutter drums and sensing apparatus

Details Mining machine with cutter drums and sensing apparatus Mining machine with cutter drums and sensing apparatus

1978-08-07

1980-02-19

Purser, Ernest R.

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

175 50, E21C 3900

Patent

active

041891830

ABSTRACT:
A drum cutter for a mining machine includes spaced-apart pick elements projecting radially therefrom and a disc forming part of a sensing apparatus disposed to follow a preceding one of the pick elements through rotational movement of the drum cutter. A disc is mounted by a pivot pin extending generally parallel with the rotational axis of the drum cutter. A sensor responds to the radial loading on the disc and produces a signal delivered to a controller for an actuator coupled to a pivot arm carrying the drum cutter. The disc is mounted to project radially about 10-20 millimeters beyond the radially-projected distance by a pick element. The sensor is a strain gage, a piezoelectric gage, an induction gage, a capacitive gage or a load cell. The sensor may be mounted within a hydraulically-power piston and cylinder assembly forming the actuator for the pivot arm. When a load cell is used, it filters out and detects pressure variations at peak magnitudes occurring as the disc penetrates the mine face with a rhythmic rotation for producing corresponding electric signals that are delivered to the controller for the pivot arm.

REFERENCES:
patent: 2620386 (1952-12-01), Alspaugh et al.
patent: 3550959 (1970-12-01), Alford
patent: 4079795 (1976-01-01), Sackmann et al.

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