Analysis of the reasons for the frequent blowout accident

1.Overload causing a puncture
At present, the domestic highway overload freight cars running situation are relatively common, quite a part of the individual transport people think, freight cars do not overload is not profitable. However, one of the main causes of freight car tire overload is.

At present, the domestic production and use of freight cars commonly used high-pressure tires, large capacity dual rear wheels generally tire. In normal circumstances, when the load on the wheels when the maximum allowed value, the internal pressure of the tire pressure of 5-7 atm, when freight cars of the actual load exceed the maximum permissible load of the wheel, the tire will increase the internal pressure large, the internal pressure of the tire when the tire valve sealing pressure over time, it will cause a flat tire, a rear wheel bearing capacity if there is a flat tire and the driver failed to find that it will lead to post-wheeled the load is too large and another tire puncture.

In addition, freight car long time use of brakes, brake drum will gradually produce high temperature, because the freight car tire valve close to the middle position tire rim inside, away from the brake drum is very near, high temperature brake drum production will make the valve at the bottom of the rubber expansion and deterioration of sealing variation, freight car that often run in mountain areas, hilly area because of long time, often have to use of brakes, tire valve sealing ordinary poor, therefore a higher probability.

2.Speeding caused a puncture
The common models and tire for speeding is small-sized passenger car, especially senior car performance good. On the highway, some good performance of the car at the speed of more than 110 kilometers per hour, senior car performance similar to overtake each other on the highway, the higher speed.

Tire pressure on modern cars is usually adopted, when the load on the wheel for the maximum permissible value, the tire inner pressure between 1.5 and 1.4 ATM, the car at high speed in the case of long time, the tire and the ground friction will generate a lot of heat, the heat accumulated to a certain degree, will cause the tire itself high temperature.

The adverse effects of high temperature on the tire has two aspects, one is the tire itself expansion and compressive variation; two is to make the air in the tire inflation causes the tire inner pressure. In addition, maintains the high speed running car tire long time, maintain a relatively stable state of the contact surface of the tire and the ground is a long time, tire strain surface difficult to be adjusted, this state maintained for a long time, tend to make more than the tire load and tire pressure strain intensity of the tire.

3. The road condition is not good

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