Forklift tire abnormal wear and Prevention

Forklift tire abnormal wear in use in general there are six types: one is the fetal excessove wear; two is the crown two shoulders of abnormal abrasion; three is turned towards the inside tire crown wheel (or lateral) extraordinary partial wear; four is the crown serrated wear; six is the crown of partial wear. Mainly for the uneven tread wear, delamination between plies, loose cord and broken and the resulting matrix cracking. off road rough terrain forklift‍ driving, each part of the tire force is more complex: in a vertical direction of the vertical reaction force, tangential direction is vertical and horizontal reaction force, so that the tire slip existing whole or partial in these directions, cause the tread wear and deformation; tensile, compression in the matrix generated inside caused by fatigue of materials, thus reducing the strength; shear stress is induced in between plies, when the stress exceeds the adsorptive power cord fabric layer and the rubber interlayer, there will be loose cord phenomenon; in the tire deformation, friction heat will occur between the outer tube and inner tube, a part of the heat quantity emitted into the air, another part of the heat accumulation, lead to the decline of tire temperature rise, performance, so that the tire abnormal wear increase, cause the loose cord, broken and matrix cracking. Under certain load and driving conditions, off road forklift trucks‍ tire has a proper tire pressure, when the tire pressure is lower than the standard value when driving, tire radial deformation increases, both sides have excessive deflection, so tread on both sides of the inner wall of the grounding, the side of the tire pressure, tire side wall tension, tire body cord deformation and great alternating stress. Compression deformation of periodic damage, fatigue will return speed cord, tire cord fabric layer and between the tire and the ground is increased relative slip, friction heat increased, the tire temperature rise sharply, reducing the tensile strength of the rubber, loose cord and local delamination, encounter obstacles during impact produced a flat tire. Tread pressure is not uniform, so that the shoulder parts wear serious, leads to the "bridge effect", the tire is dentate or wavy. The tire tread concavity easy embedding road nail and stones, causing mechanical damage. Tire rolling resistance increased, increased fuel consumption. Experiments show that, when the tyre pressure is lower than the standard value of 20%-25%, the corresponding increase in 20% consumption. When the tire pressure is higher than the standard value when driving, the tire crown central ground contact area decreases, the tire and the road surface, load per unit area increased, crown central increased wear. Tyre cord by overdistention, carcass cord stress increases, the fatigue process of cord is accelerated, causing cord pull off, causing early burst tire.‍

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