No matter what kind of car, the tire is a key part. In underground operation or earthwork operation, speeding or overloading has an impact on the tire. Today we will introduce it to you.

每一种铲运机都规定了其所用轮胎的规格、型式、层级、花纹及有无内胎等。选用轮胎时，要根据工作环境的具体情况，并考虑路况、气候、负荷、速度等各种影响因素以及工作条件。

Specifications, types, levels, patterns and inner tubes of tires for each scraper are specified. When selecting tires, it is necessary to consider the road conditions, climate, load, speed and other factors as well as working conditions according to the specific conditions of the working environment.

每一种铲运机均规定了行驶速度和平均车速。当机器超速行驶时，轮胎的温度升高、帘布层分离，会加快轮胎的磨损和破裂，缩短轮胎寿命，试验表明了车速和轮胎寿命的关系。

Driving speed and average speed are specified for each scraper. When the machine is speeding, the temperature of the tire increases and the ply separation will accelerate the wear and tear of the tire and shorten the life of the tire. The test shows the relationship between the speed and the life of the tire.

铲运机在行驶时，轮胎所承受的动载荷很大，即使在平坦的路上以中速行驶时，其动载荷也比静载荷大一倍。动载荷随路面的不平度、机器的行驶速度和轮胎刚性的增大而增大。

When the LHD is running, the tire bears a large dynamic load. Even when it is running at a medium speed on a flat road, the dynamic load is twice as large as the static load. The dynamic load increases with the increase of road roughness, machine speed and tire rigidity.

在平坦路面上行驶时，动载荷几乎与车速的平方成正比，故铲运机的载荷要小于其额定载荷，因轮胎超载时会出现扭曲、发热现象。温度过高可使帘布层分离轮胎变形，可导致轮胎迅速磨损、割裂。

When driving on a flat road, the dynamic load is almost proportional to the square of the vehicle speed, so the load of the scraper is less than its rated load, because the tire will be distorted and heated when it is overloaded. Too high temperature can cause ply separation and tire deformation, which can lead to rapid tire wear and tear.