Well-drilling winch

The multi-rope friction hoist mainly consists of an electric motor, a reducer, a friction wheel, a braking system, a depth indicator, a speed-limiting and speed-measuring system, and an operating system. It is driven by either an AC or DC motor.

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Hebi Shuangmin Mining Machinery

Description

The multi-rope friction hoist consists primarily of an electric motor, a gearbox, a friction sheave, a braking system, a depth indicator, a speed-limiting and speed-measuring system, and an operating control system. It is driven by either AC or DC motors. When a low-speed motor is used, a gearbox can be omitted; instead, the motor is directly connected to the drum’s main shaft, or the motor rotor is mounted at the end of the drum’s main shaft. When the transmission power is high, two or four motors can be used simultaneously for driving. The total power of a single hoist has reached as much as 11,600 kilowatts. The braking system is a critical component that ensures the safe operation of the hoist. In case of an emergency, the braking system should generate two-stage safety braking via a hydraulic system capable of adjusting the braking torque, thereby ensuring that the hoist stops promptly without causing excessive braking force. For hoists driven by AC motors, the braking system must also possess highly responsive braking torque control capabilities to precisely regulate the hoist’s running speed as it approaches the point where the carriages are about to enter the station.

Mine hoists can be controlled in several ways, including manual, semi-automatic, and fully automatic.

As mining operations deepen and centralized hoisting systems become more prevalent, multi-rope friction mine hoists hold great potential for further development. To this end, researchers are exploring friction lining materials with excellent wear resistance and high coefficients of friction. New-structure multi-rope friction-winding mine hoists have begun to be used in several countries, and they play a crucial role in deep-mining operations where hoisting heights are particularly significant.