Research on start control mode of multi-rope friction hoisting system of vertical shaft

In order to study influence of different start control modes on multi-rope friction hoisting system of vertical shaft, mathematical model of hoisting system was established. Five different start acceleration control curves including rectangle, parabolic, sinusoidal, triangle and trapezoid were established taking hoisting system of main shaft in a mine as an example. Matlab/Simulink was used to analyze dynamic tension changes of wire rope under different start acceleration control curves and anti-skid safety performance of the system. The results show that the rectangular acceleration control curve adopted in the start-up and acceleration stage of the hoisting system can meet anti-skid requirement, but the dynamic tension of the wire rope is large; Through comparison of the start acceleration control curves, it is found that for the same lifting system, a reasonable trapezoidal acceleration control curve form is superior to other acceleration control curve forms at the same starting and acceleration time; The reasonable value range of acceleration time in the first step of the trapezoidal acceleration control curve is 1-1.5 s, in this range, the force of the wire rope is improved and can meet anti-slip safety requirements of lifting system.