Shearer loader and method of working by cutting action minerals occurring in seams by means of a shearer loader of this type

摘要

It is known to operate shearer drums at a constant speed by shift gears to be controlled when at rest, while the haulage speed in the longitudinal direction of the face can be changed via an electric control circuit in accordance with the loosening resistance. Here, the cutting force and the cutting speed are not variable, and only the haulage speed can be changed. In the face of greater resistance in the mineral, efficient cutting is not possible. The coal does not accumulate in lumps. According to the invention, the shearer drums (11, 21) are mechanically coupled in a drive train and, together with a hydrostatic adjusting pump (25) forming a component of a feed control circuit (26), are attached to the secondary side (4) of a converter (3) which on the primary side is connected to a motor (1). In this way and by means of superimposed members (50, 51), the haulage speed and the drum rotary speed, below a determinable cutting force, can be given a linear proportional variable relationship, and above the cutting force the haulage speed can be throttled back over-proportionally to the fall in the drum rotary speed while varying the cutting depth or the haulage speed can be reduced while maintaining a constant minimum rotary speed. <IMAGE>