According to the survey, the cargo semi trailer currently produced are generally experiencing abnormal tire wear during use. Generally, driving at 2x104 km is more obvious, driving at 5x104 km is the most significant, and worn tires account for about 30% of the total semi-trailers.
Based on the investigation and analysis, several measures to improve the abnormal wear of medium-sized semi-trailer tires were proposed.
The life of the tire is largely related to the structural type of the semi-trailer, the use conditions, the technical condition of the vehicle, the technical level of the driver, the maintenance of the tire and whether the repair is timely.
Not inflating according to the air pressure standard is one of the main reasons for abnormal wear of tires, and many tires are scrapped for this reason. Because the pressure is unevenly distributed on the contact area, the tread will be unevenly worn, and the edges of the running surface will be severely worn, and the wear will usually be toothed or wavy.
When the tire is operating under high air pressure, the deformation of the tire and the contact area between the tire and the road surface are both small. Therefore, the pressure on the ground contact area increases, which accelerates the wear of the middle tread.
When the semi-trailer is overloaded or the load is not properly distributed on the cargo compartment, it causes wear and tear of the tire overload.
The wheels are not perpendicular to the road surface, which will cause uneven pressure distribution on the ground contact area of the tire, and the tire will roll and slip during driving, resulting in tire wear. In this case, the inside of the tire inner surface of the trailer axle is severely worn.
The service life of a tire is closely related to the technical condition of the cargo semi trailer. In user surveys, we learned that many unfavorable factors of technical condition can cause early damage or rapid wear of the tire.
1.Braking stagnation or poor wheel bearing rotation performance
In this case, the running resistance of the tire is very large, and at the same time, the heat generated by the brake hub and the tire increases sharply, which will cause rapid wear of the tire tread.
2.The distance between the center of the traction pin and the ground contact center of the left and right tires is large.
3.In this case, the tire is subjected to an additional lateral force, which increases the probability that the semi-trailer will swing left and right during driving, causing the tire tread to wear.
3.Dislocation between leaf springs
The serious misalignment between the leaf in the leaf spring assembly will cause a great change in the stiffness and damping of the leaf spring assembly, cause the semi-trailer to generate bad vibration and shock during driving, and deteriorate the driving performance of the tire This results in abnormal wear of the tire.
4.Unbalanced wheel rotation mass
Wheels traveling at high speed, wheels with a degree of balance vibration, and impact on the rotation plane. The impact load acts on the tire, causing additional stress in the carcass, and causing a highly uneven wear on the tread.
The main factors causing abnormal wear of the semi-trailer tires by the driver's operating techniques are sharp braking and sharp turns.
Abrupt braking is one of the main causes of uneven wear on the tire's running surface. When the tire is "locked" and slipped, the friction force can be as high as several tons. If the brake is often "locked" for a long time, the tire will Face wear quickly. According to the data, some spots may appear on the tread when braking sharply, and these spots become deep pits after a long time.
When cornering sharply at high speeds, large lateral inertial forces are generated. In this case, it is possible to cause side-sliding of the semi-trailer, strong sliding of parts of the tread, and wear of the tread, especially the edges of the tread of the tire.
The service life of a tire is closely related to its maintenance. Due to different use and maintenance methods, the service life of tires can often be doubled or even more.
For example, due to the different working conditions of the tires, the wear conditions of the tires are very different. If the tires are regularly replaced regularly, the wear of each tire can be made more uniform and its service life can be prolonged. Without regular tire replacement, tire wear will be uneven and the life of the tire will be shortened accordingly.
TITAN 3 Axle 60 Ton Cargo Semi Trailer for Sale
According to surveys, semi-trailers are generally overloaded severely during use, with severe overloads of 50% to 60%. In order to avoid overloading the tires, it is recommended to reduce the tire load coefficient appropriately when selecting semi-trailer tires to meet the requirements of the use conditions.
For semi-trailer tank trucks often driving on bad roads or severe overloads, larger tires are optional.
Regardless of whether a new tire or a repaired tire is used, it should be inflated in strict accordance with the air pressure specified in national standards. Allowable deviation of air pressure for truck tires from the standard ± 0.0196Mpa
In order to uniformly load the tires on the semi-trailer axle, the phenomenon that the wheel plane is not perpendicular to the road surface must be eliminated.
The following measures can be used to reduce the dynamic load when the tire is running:
1.Reasonably select the structural parameters of the semi-trailer, make the stiffness matching between the semi-trailer frame, suspension and tire reasonable, ensure that the semi-trailer has good vibration characteristics and reduce the impact load during driving;
2.Improve road conditions;
3.When the vehicle is traveling on an uneven road, reduce the driving speed appropriately.
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