description
Multi-rope Hoist working principle
The drum is winded with the closed rope which had the container in the central, when the motor drives the drum rotation, the container is lifted and lowered via the friction between the rope and drum, and the running speed is controlled by the electric drive. The disc brake is controlled by hydraulic and electric control system. The depth of the container is indicated by the position indication system. The sensors and control units compose of the mechanical, electrical and hydraulic combined control system in order to monitor and protect the whole set of the hoist. All the message in and out of the hoist is realized by computers and network technology.
Technical Characteristics
1. According to the performance parameters if the hoist, it can be equipped with single brake or double brake friction wheels. The friction liner of floor-mounted friction hoist is double-rope slot with rope drawing device, while tower-type hoist with single-rope slot.
2. Under the condition of no-oil, pouring water and using special grease, the friction liners with material of GM-3 or imported GDM-326 high performance material can be selected. The friction efficiency is more than 0.25.
3. Pulley and head sheave with eccentric distribution, equipped with PVC liner on the wheels to reduce the wear of the rope.
4. Adopting disc brake with back oil cylinder and electric-hydro joint control. Hydraulic stations are divided into two types: medium and medium-high pressure. The medium pressure one has 2-stage brake of constant braking force with electric or hydraulic delay, while the medium-high pressure one has 2-stage of constant speed-reducing and constant braking torque. Hydraulic stations could be equipped with pressure sensor, transfer and relay.
5. Speed testing & follow up protection. It would be equipped with disc brake runout monitor device, rope slide device, slot turning device and special tools, etc.
6. There are 4 kinds of control console available. They all have integrated signal lights, two of which are desk type with a modern integral handle, and could equipped with its own computer with crystal display screen, and the other two ones of which are split control console with digital depth indicator. All of the control consoles have special operation tables, such as tables for industry television, computer, printer and so on.
7. Equipped with network control for mining hoists and the remote diagnostic system.
8. Using WSM-3 Environmental Plastic Brake Block to ensure the safety of the disc brake.
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