Traction System Overview

The elevator traction system generates and transmits the mechanical force needed to move the car. At its core, the traction machine drives the steel wire rope that passes over the drive sheave. Depending on the roller type—such as a grooved or rubber-coated sheave—friction is optimized for smooth operation. The system may use roping=2:1, where the rope loops between the car, machine, and counterweight to reduce the required machine torque, or roping=1:1, where the rope directly connects the car to the counterweight for higher efficiency. A geared traction machine employs a gearbox to reduce motor speed while increasing torque, ideal for lower-speed applications. To minimize vibration transmission, an anti-vibration pad is installed between the machine and the support structure. The rope attachment securely terminates the steel wire ropes to the car and counterweight yokes. Finally, a deflector sheave redirects the rope path when the machine position does not align with the car or counterweight, enabling compact machine room layouts.

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