Analysis of Factors Affecting the Energy Efficiency of an Elevator Winch

Based on the energy conservation equation during the machine’s movement, dependencies were obtained to determine the efficiency of the elevator winch for two modes of movement: at a steady speed and during start-up. The dependence for calculating the efficiency of an elevator winch in the start-up mode is determined based on the analysis of dynamic loads that occur when lifting the cabin. At the same time, it was determined that the efficiency of the winch for this mode depends not only on inertial loads but also on the rigidity of the rope. It has been established that with an increase in the rigidity of the hoisting rope, the maximum value of the force in the rope increases after the cabin is detached from the base, and, accordingly, the efficiency of the passenger elevator winch decreases in dynamic modes. It is shown that the efficiency of pulley blocks depends not only on the friction in the block support but also on the rigidity of the lifting rope: the greater the rigidity of the rope, the lower the efficiency of the mechanical block.