AN ANALYSIS OF THE EFFECT OF EMERGENCY BRAKE IN THE HOISTING MACHINE

摘要

If the drive system in the hoisting machine fails to work, it takes for the emergency brake to drive. Then, during this period, the load will do accelerated movement downward under the effect of dead load which may result in a.) a sharp acceleration in the rotating speed of the drive system b.) a quick increase in the braking distance of the load and a followed drop distance. Therefore, there exists an allowable time for the emergency to work efficiently. In this article, a calculation formula for the above mentioned rotating speed and distance is put forward. Also an example of calculation is offered so the significance is proved as well.