When it comes to road rollers, I have to give a brief introduction to the development of compaction technology.
As early as ancient times, people used the hoofs and feet of herds to trample, rub and compact the soil to treat the foundation of houses and compact dams. And river embankments, before the middle of the 19th century, the road engineering in the west was mainly gravel paving, and the compaction mainly depended on the natural rolling of vehicles. It was not until the invention of the stone rolling mill in 1858 that promoted the development of gravel pavement. The use of horse-drawn drums for compaction gradually emerged, which was the earliest prototype of road rollers.
In 1860, steam rollers appeared in France, which further promoted and improved the construction technology and quality of gravel roads and accelerated progress. At the beginning of the 20th century, the world recognized the gravel road as the best road at that time, and it was promoted all over the world. The concept of compaction was gradually known, and road rollers also appeared on various road construction sites. In the mid-19th century, the internal combustion engine The invention brought great vitality to the development of compaction equipment.
The first internal combustion engine-driven road rollers were born in the early 20th century. Then came tires, sheep foot rollers, and smooth rollers were produced almost at the same time. People have studied the compaction effect of static rollers. It is believed that increasing the weight of the rollers can increase the line pressure of the rollers, thereby improving the compaction. Effect. Therefore, for a long period of time, people have devoted themselves to the development of large-tonnage road rollers. The largest tire roller once weighed more than 200 tons. However, during this period, the changes in road rollers were mainly reflected in the improvement of power and appearance.
In the 1970s, with the development of hydrostatic transmission technology, hydraulic control technology, and computer technology, the research on compaction technology and compaction equipment made great progress. First of all, the hydrostatic transmission is applied to the compaction machine. Through the control of the flow rate of the hydraulic system, the speed of the motor can be easily changed to realize the continuous adjustment of the vibration frequency of the roller, thus greatly simplifying the complex transmission system. During this period, the research on vibratory rollers mainly focused on the optimization of parameters of vibratory rollers, and gradually realized the stepless continuous adjustment of vibration frequency and vibration amplitude, which improved the compaction effect.
Construction machinery such as road rollers is capital-intensive, technology-intensive, and highly related to related industries. They involve a wide range of technologies and many businesses. The improvement of the technical content of OEM products requires the close cooperation of many supporting manufacturers. 70% of the accessories need to be provided by professional factories. The main production of road rollers is mainly based on the overall design of the product, the manufacture of structural parts, and the purchase and assembly of product accessories.
After more than 40 years of continuous development, China’s road roller industry has made great progress. Especially since the 1990s, the production and sales of road rollers have grown rapidly, and the number of companies joining the production of road rollers has continued to increase, so that there are more than 80 road roller manufacturers, which can produce 5-30t vibratory rollers, 4-24t static rollers and 16-30t tires A series of products with relatively complete specifications and varieties such as road rollers have basically formed a complete road roller manufacturing system that can be independently developed and produced, and the gap between its technical level and the international advanced level is gradually narrowing. This high-speed growth situation is bound to push the road roller accessories industry to a new development period.
