FIELD: equipment for underground mining, particularly slot cutting bit adapted to operate in high-pressure environment.
SUBSTANCE: device comprises driving gear put in case, pressurizing means to change pressure in the case and active regulation means. Active regulation means may be operated by control means to change inner pressure in driving gear case. Active regulation means comprises pump and/or equalizing vessel. The pump and the equalizing vessel are communicated with driving gear case through fluid supply and/or discharge pipeline.
EFFECT: increased air-tightness and packing of driving gear due to increased accuracy of oil pressure regulation in driving gear box in dependence of environment conditions.
14 cl, 6 dwg
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