1. The tire life filled with ordinary air is different from that filled with nitrogen:
Oxygen in ordinary air will react with rubber and steel wire of tire, which will age rubber and steel wire and shorten tire life. However, nitrogen is not easy to react with rubber and tire steel wire because of its low molecular activity, which can delay rubber aging.
2. Ordinary air and nitrogen have different breakdown probabilities:
Nitrogen is extremely inert, gas molecules are larger than oxygen molecules, and it is not easy to expand with heat and contract with cold, so the deformation range is small. Moreover, the speed of its penetration into the tire sidewall is about 30%-40% slower than that of air, which can really keep the tire pressure stable to some extent.
Compared with ordinary high-pressure air, high-purity nitrogen has low thermal expansion coefficient, low thermal conductivity and slow heating, which reduces the speed of tire heat accumulation, is nonflammable and does not help combustion, and effectively reduces the probability of tire puncture.
3. The applicable environment of ordinary air and nitrogen is different:
Because nitrogen has some characteristics of inert gas, it is nonflammable and has good thermal stability. Usually used in very professional tires or harsh environments, such as F 1 racing tires and airplane tires. Ordinary air is generally only suitable for ordinary cars.
For ordinary tires, the internal support structure of tires is equivalent to the combination of reinforcing cords and belts. In order to ensure the strength, most of these spokes are made of high-performance resin materials that can keep soft. The arrangement of spokes is based on the main design principle of reducing the internal pressure when the tire is deformed, and the pressure transmission is realized by arranging spokes with different shapes.
Advantages and disadvantages of filling ordinary air and nitrogen;
Advantages of ordinary pneumatic tires: wear resistance, long service life, non-pneumatic tires are not afraid of pricking, wear resistance, small rolling resistance, and the service life is more than 3 times that of pneumatic tires. Tire aging is slow, and a heat exchanger is installed inside the tire, so that hot and cold air inside and outside the tire body can be automatically exchanged, which can effectively reduce the tire body temperature, greatly delay tire aging, and avoid tire puncture and air leakage.
Good elasticity, excellent materials, special structure combined with patented technology, good performance, high resilience and good resilience.
Disadvantages of ordinary pneumatic tires: poor comfort, easy to bump during driving, and increase resistance, resulting in poor vehicle comfort. The bearing capacity is low and the speed cannot be too high. Due to the internal support structure, this kind of tire can't bear heavy load and high speed.
Support structures are easy to be damaged because they are exposed and the structural strength of plastic materials of these polymer structures is not as strong as expected. Once foreign matter enters the tire, it will inevitably lead to the damage of the supporting structure.
Advantages of nitrogen tires:
Improve the stability and comfort of tire running and prolong the service life of tire.
Prevent tire puncture and running over due to lack of air. Compared with ordinary high-pressure air, high-purity nitrogen has the characteristics of low thermal expansion coefficient, low thermal conductivity and slow temperature rise, which reduces the speed of tire heat collection, thus greatly reducing the probability of tire puncture.
Disadvantages of nitrogen tires:
Disadvantages of reducing fuel consumption and protecting the environment: Before filling the tire with nitrogen, it is necessary to evacuate the original air in the No.3 wheel tire, but it is usually impossible to evacuate to 100% vacuum, so there is still a very small amount of oxygen left (1-2%). The oxygen content in the corresponding tire needs to be reduced to about 2-3% to achieve the balance of internal and external partial pressure of the tire. Therefore, in fact, the purity of nitrogen required for filling tires with nitrogen can only reach 95-98%.
Vacuuming is the vacuumizing function of nitrogen machine, but often the tire will be deformed because of vacuuming. The interior of the tire consists of steel curtains. Because of the vacuum, the tire will be deformed, and so will the steel wire. In a sense, it will also cause tire damage.
Nitrogen-filled tires are relatively difficult to puncture, but if they are not properly maintained and used, they will still be in danger of puncture due to side injuries. Therefore, for vehicles filled with nitrogen, tire maintenance and inspection can not be ignored.