METHOD FOR CHECKING THE FRICTION BETWEEN THE TRACTION SHEAVE AND THE SUSPENSION ROPES OF AN ELEVATOR

摘要

ABSTRACTIn a method for checking and monitoring thefriction between the traction sheave and the suspensionropes of an elevator, the slippage between the tractionsheave and the suspension ropes of the elevator ismeasured, the elevator comprising an elevator machine, ahoistway and an elevator car and a counterweight moving inthe hoistway. The rope slippage is measured eitherperiodically by performing test drives or continuously bymeans of an impulse device placed in the elevator machineand measuring the motion of the traction sheave, animpulse device monitoring the movement of the elevator carand an impulse device monitoring the load in the car. Thedata provided by these impulse devices is transmitted to acomputer which calculates and monitors the relativeslippage between the traction sheave and the suspensionropes of the elevator.