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Multi-rope friction hoist

The multi-rope friction hoist primarily consists of an electric motor, a gearbox, a friction sheave, a braking system, a depth indicator, a speed-limiting system, and a control system, and is driven by either an AC or DC motor. When a low-speed motor is used, a gearbox can be omitted entirely—allowing the motor to connect directly to the drum’s main shaft, or even positioning the motor rotor at the end of the drum shaft.

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Multi-rope friction hoist

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Product Description

Multi-rope friction hoists are classified according to their installation type as Well-tower type (lifting) (150 kN – 1100 kN) And Floor-standing (Increased from 100 kN to 770 kN) ， (For more details, please call us.) Primarily used for lifting materials, personnel, and equipment in vertical shafts of coal mines, metal mines, and non-metallic mines. As mine depths and production levels continue to increase, the diameter of hoisting steel ropes has grown significantly. Building on the single-rope winding hoist system, engineers have developed a new type of multi-rope friction hoist that uses multiple steel ropes instead of just one, offering enhanced efficiency and safety.

The principle of a multi-rope friction hoist:

Friction hoisting, as the name suggests, relies on frictional force to lift heavy objects. In terms of its working principle, it differs significantly from winding hoisting: instead of being wound around a drum, the steel wire rope is draped over a friction wheel, with lifting containers suspended at both ends. The rope is moved by the friction generated between the friction wheel's specially designed lining and the steel cable, enabling the containers to ascend or descend and thus accomplishing the task of lifting or lowering heavy loads. Currently, as users increasingly demand faster overall shaft construction project timelines, more and more are opting for floor-mounted multi-rope friction hoists.

Multi-rope friction winch

The multi-rope friction hoist primarily consists of an electric motor, gearbox, friction sheave, braking system, depth indicator, speed-limiting system, and control system, and is driven by either an AC or DC motor. When a low-speed motor is used, a gearbox can be omitted entirely—the motor is directly connected to the drum’s main shaft, or the motor rotor may even be mounted directly at the end of the drum shaft.

　　The braking system ensures the safe operation of the hoist. An essential component of the system. In emergency situations, the braking system should generate two-stage safety braking via a hydraulic system with adjustable braking torque, ensuring the hoist stops promptly without causing abrupt or excessive braking. For hoists driven by AC motors, the braking system must also feature highly responsive, continuously adjustable braking torque capabilities, enabling precise control of the hoist's speed as it approaches the stopping point.

Shaft-type multi-rope friction hoist:

Advantages :

① Compact and space-saving;

② Eliminate the overhead sheave;

③ All loads are directed vertically downward, ensuring excellent derrick stability;

④ Offers a larger wrap angle, enhancing anti-slip performance;

⑤ Steel cables are not exposed outdoors; the usage environment is favorable.

Floor-mounted multi-rope friction hoist:

Advantages :

① The derrick is a structural component, offering low costs and short turnaround times;

② Suitable for seismic zones,

Model Designation for Multi-Rope Friction Mine Hoists :

Example 1: The product model of the shaft-type multi-rope friction hoist, featuring a 3-meter-diameter friction wheel, four steel ropes, and a single motor with a reducer and resistance-based speed control, is: JKM-3×4Ⅰ.

Example 2: The friction wheel has a diameter of 5 meters, features 6 steel ropes, and is driven by a dual-motor system with gear reducers, enabling DC speed control. This product—designed as a shaft-type multi-rope friction hoist—is identified by the model number: JKM-5×6ZⅡ.

Example 3: The product model of the 4-meter-diameter friction wheel, featuring four steel wire ropes and a single motor with variable-frequency drive and no gearbox—designed as a floor-mounted, multi-rope friction hoist—is JKMD-4×4PⅢ.

Example 4: The friction wheel has a diameter of 5 meters, features 4 steel wire ropes, and is equipped with dual motors—each without a gearbox—utilizing switch-mode resistive speed control. This model is a floor-mounted, multi-rope friction hoist designated as: JKMD-5×4DⅣ.