Application of solid tires
Solid tires are mainly used for industrial vehicles such as low-speed and high-load hoisting vehicles, traction vehicles and flatbed trucks, such as various forklifts, port and airport trailers, etc. Military, construction machinery and other fields, but also widely used in medicine, food, paper, textile, electronics and other fields.
Classification of solid tires
1. Solid tyre for pneumatic tyre rim
Solid tires mounted on rims for pneumatic tires.
2.Press-on solid tyre
Tires that are vulcanized on endless metal belts and then pressed onto matching wheels.
3. Cured-on solid tyre
Tires vulcanized directly on the running wheel.
4.Non-marking solid tyre
Solid tires that do not leave marks on the ground, especially brake marks, during use.
Advantages and disadvantages of solid tires
Advantages: The biggest advantage of solid tires is wear resistance, do not worry about tire pressure and air leakage, not afraid of tire punctures, bad tires, small needles and small nails. Another point is that solid tires can carry more load than pneumatic tires. Finally, in terms of the aging speed of rubber, solid tires must last longer than radial tires, which can meet the long-term use needs of vehicles working in harsh environments. The service life is generally relatively long, usually 3 to 5 years, no need to pump up, saving a lot of after-sales trouble.
Disadvantages: poor ability to adapt to the road surface, uneven road surface is relatively bumpy, poor shock absorption capacity, heavier tires increase the weight of the vehicle.
Reasons why solid tires are rare
Everyone is saying that you should regularly check the tires, tire pressure, tire temperature, air leakage, etc., and try to avoid tire blowouts. Then someone asked: Don't you need to worry about these if you make it directly? But why did radial tires replace solid tires? The previous rubber tires were indeed solid, but they were not comfortable in use. As the saying goes, a shoe weighs one kilogram and a person weighs five kilograms. The same is true for tires. Solid tires are definitely heavier than the current radial tires, which will cost more. Oil.
Furthermore, the solid tires are not comfortable enough, the bumps during driving are more intense, and the cost is higher. The second is that the solid tire is unstable. When the tire is running at high speed, it is too late to restore the deformation, and it may generate a standing wave on the carcass, which will cause the tire temperature to rise sharply and cause the tire to blow out. Solid tires are more prone to this phenomenon, and there have been cases of tire chipping in tests using solid tires. In addition, the solid tire increases the unsprung mass. The larger the suspension mass, the slower the suspension system responds to changes in the road surface, which has a great impact on the dynamic performance of the vehicle. Therefore, solid tires are mainly used in industrial vehicles such as forklifts.
Common quality problems of solid tires
1. Delamination: There are circumferential cracks or delaminations between the rubbers, and there are many inflatables.
reason:
(1) The rubber compound contains moisture and sundries, especially the viscose is polluted by rainwater and sundries during storage and transportation.
(2) Poor heat preservation of the embryo and the temperature fluctuation of the vulcanizing machine cause insufficient sulfur.
(3) The embryo is formed too early and the parking time is too long, resulting in the self-sulfurization of the rubber in the center of the embryo.
(4) Overload and overspeed operation during use.
2, off the circle
reason:
(1) The viscosity of the adhesive does not meet the technological requirements.
(2) The surface is contaminated after applying the adhesive.
(3) Poor heat preservation of the embryo and the temperature fluctuation of the vulcanizing machine cause insufficient sulfur.
(4) Overload and overspeed operation during use.
3. Block drop: The rubber surface is partially broken off
reason:
(1) The mold was not opened in time after the vulcanization time, resulting in over-sulfur and aging.
(2) The rubber compound is mixed and heated unevenly.
(3) Poor heat preservation of the embryo and the temperature fluctuation of the vulcanizing machine cause insufficient sulfur.
(4) The use environment is poor and it is cut by external force.
(5) The use environment is corroded by chemicals.
Why do construction vehicles use solid tires?
1. Excellent safety performance, which is conducive to improving work efficiency
Because the solid tire carcass is made of all rubber, the puncture resistance of the tire is guaranteed to the greatest extent, and the hidden danger of tire puncture during the load-bearing operation of industrial vehicles and in the harsh working environment is fundamentally eliminated. Solid tires have small load-deformation variables and good running stability. Because of their puncture resistance and tear resistance, they do not need to be inflated, which avoids the heavy labor of frequent tire repair and tire replacement, and can improve the utilization rate and work efficiency of the vehicle. In vehicles, solid tires can completely replace pneumatic tires.
2. Reasonable structural design to ensure that the tire has good performance
The solid tire adopts an advanced three-stage structure design, and the three rubber compounds ensure the overall performance of the tire. The high-rigidity, high-strength base rubber and steel ring support not only ensure the stiffness of the tire, but also ensure the tightness of the tire and the rim, which fundamentally eliminates the problem of the sliding ring of the solid tire; the high-elasticity intermediate rubber effectively It absorbs the vibration generated when the vehicle is running, has a comfortable driving experience, and avoids damage to the vehicle at the same time; the thick tread rubber layer ensures the tear resistance and wear resistance of the tire and improves the service life of the solid tire.
3. Advanced technology and formula design
The production of solid tires has advanced technology with more than half a century of production history and experience, which maximizes the performance of tires in the design of rubber formulations. The heat generation and temperature rise and fall during operation are minimized, and at the same time, the heat resistance of the tire is improved, thus solving the serious problems of solid tires such as swelling, slip ring, and burst caused by temperature rise; the advanced formula design reduces the tire temperature. rolling resistance. Tested by the National Construction Machinery Quality Supervision and Inspection Center, the rolling resistance coefficient of solid tires is equivalent to that of pneumatic tires, which solves the problem of increased fuel consumption caused by the replacement of solid tires.
4. Avoid the danger of vehicle tire burst out of control
Pneumatic rim-type solid tires are solid tires that can be used interchangeably with pneumatic tires of the same specification. When the vehicle is running at high speed, if the tire hits potholes and other obstacles, the tire will be severely squeezed and deformed between the obstacle and the rim flange, which can cause the carcass cord to break, and the compressed air inside the tire will be broken. The line is jacked up to form a bulge.
If it is more serious, it will cause the tire to crash and rupture, and it will be completely deflated in an instant, and there may be a danger of losing control of the vehicle. Compared with pneumatic tires, it has the advantages of high safety, puncture resistance, tear resistance, wear resistance and long life. It is an ideal replacement product for pneumatic tires in the field of industrial vehicles. With the development of industrial vehicles and the improvement of solid tire production technology, this kind of tire is more and more widely used.