VENTILATION PLANT Russian patent published in 1999 - IPC

FIELD: mining industry; underground transport. SUBSTANCE: ventilation plant has working and stand-by ventilators, each including diffuser, electric motor connected with ventilator by transmission shaft by means of toothed couplings. Ventilator coupling has thrust beads with faces which serve as support for transmission shaft in assembled state. In design version with suction plant it has bearing support enclosing the shaft in its middle part and arranged in guide bushing installed in diffuser for radial displacement. EFFECT: enhanced reliability of plant owing to simplification of its design and facilitated servicing and, in suction plant design version, owing to reduced amplitude of oscillations and vibrations of long transmission shaft and increased rigidly of shaft. 2 cl, 3 dwg