Wooden lining board: The wooden drum lining board used in the single rope winding hoist has a long operation cycle due to the higher requirements for the selection of lining wood. It is usually oak wood and oak, followed by volvulus. After processing in strict accordance with the technical requirements, the on-site installation is generally about 4 days, and the process is cumbersome, which affects the production time for a long time;
Steel liner: Replacing the steel drum rope groove is actually equivalent to replacing the main shaft device, and the installation work is large, and the labor intensity is large. Generally, it takes at least 5 days and affects production for a long time;
Plastic liner: The plastic liner is press-formed, and its thickness can be selected within a certain range. The rope groove is smooth and flat, and it only takes about 13 hours to install on site, and it can be put into use immediately. Obviously, the technical performance of plastic lining is superior.
Due to low strength and poor fatigue resistance, the wooden lining is easy to be crushed or flattened by the steel wire rope, causing the rope to be arranged irregularly, and the phenomenon of rope biting occurs, causing the steel wire to wear and break the wire to exceed the limit and be scrapped;
Due to the large contact stress between the steel material and the steel wire rope, the steel drum liner is repeatedly subjected to extrusion stress, bending stress and dynamic stress, which causes serious wear on the steel wire rope, and the wire rope is replaced more frequently;
Plastic lining is a material with low modulus of elasticity, which can make the wire ropes neatly arranged and can significantly reduce the contact stress between the wire rope and the rope groove, thereby greatly reducing the wear of the wire rope and effectively extending the service life of the wire rope.
Taking the 2JK-3/11.5 mine hoist of Shuoli Mine as an example, the wooden lining is generally replaced once a year, and the cost is about 35,000 yuan; the steel lining has a service life of about 20 years, and the cost is about 300,000 yuan; plastic lining is used The service life of materials is generally 8-10 years, and the cost is about 62,000 yuan. It can be seen from the comparison that the advantages of plastic lining in service life and price are obvious.
To sum up: the plastic lining has a short construction time for installation and can extend the service life of the wire rope. Due to its high mechanical strength, long service life, compression molding, smooth rope groove, and wide application range, because of its small specific gravity (0.98), it will not increase the moment of inertia and reactive power of the equipment, and it has energy-saving effects.
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