Novytski O. Support of Parameters of Pole Piece, and a System of Mine Locomotive Magnetic-rail Loader Stringing

The thesis is devoted to support of parameters of mine locomotive magnetic-rail loader with separable pole piece. The work develops mathematical model of train brak-ing by means of wheel and clasp brake with simultaneous locomotive axles loading. There is identified a pole piece friction factor-slip velocity characteristic taking into ac-count the effect a change in excess force of pressing to rail. Results of studies of rail track unevenness effect on the efficiency of separable pole piece show that to provide stable value of adhesion, pole piece should consist of two parts connected by means of sliding pair with springing elements. It is identified that excess axle loading provides increase in safe decelerating torque. It is proved that magnet-rail system application in a loading mode is more efficient to compare with braking mode. It is also determined that ap-plication of separable pole piece while operating in workings having rail track un-evenness provides higher adhesion to compare with standard pole piece owing to tighter contact of shoe with a rail. It is proved that magnet-rail loader application helps in-crease in the stability of locomotive travel in a sharp curve. It is developed relation-ship between stability factor against creepage of a wheel on a rail and loader pole slope. It is determined that to develop maximum loader effect, pole slopes should be 15° to 35°. There is developed a technology to parametrize magnet-rail loader of mine lo-comotive which is used by Druzhkivka machine-building plant while designing new-generation braking systems for mine locomotives