Types of road rollers.

Permanently deformed and dense. It is divided into two categories: steel wheel type and tyre type.

The roller structure includes light roller, trough roller and sheep foot roller, etc. Light grinding is the most common application, mainly used for road surface compaction. Using mechanical or hydraulic transmission, can concentrate the force to compact the protruding part, high compacting flatness, suitable for asphalt pavement compaction operations.

According to the axle arrangement, there are single axle single wheel, double axle double wheel, double axle three wheel and three axle three wheel. Using internal combustion engine as power, mechanical transmission or hydraulic transmission. General front-wheel steering, good maneuverability, rear-wheel drive. In order to improve the steering and rolling performance, it is advisable to adopt articulated steering structure and all-wheel drive. The front wheel frame and frame are hinged to reduce the road surface's irregular fuselage swing. The rear wheel and the frame are rigidly connected. Using hydraulic control, hydraulic cylinder control steering. Both front and rear rollers are equipped with scraping plates to remove adhesive from the rollers. It is also equipped with a water spray system for the compaction of asphalt pavement, which sprinkles water on the roller to prevent the asphalt mixture from sticking. In order to increase the force, iron, sand and water can also be installed in the roller to increase the weight.

The main technical parameters of steel wheel roller are machine weight and line pressure. In the 1980s, the weight range of various steel wheel rollers is about: two-wheel rollers 2 ~ 13 tons, three-wheel rollers 1 ~ 15 tons, according to the need for pressure weight 1 ~ 3 tons, three-axis three-wheel rollers 13 ~ 14 tons, after the pressure weight is 18 ~ 19 tons.

The roller adopts pneumatic tires, which are generally installed 3 to 5 front wheels and 4 to 6 rear wheels. If the inflation pressure is changed, the ground pressure can be changed, and the pressure adjustment range is 0.11 ~ 1.05 mpa. Wheel roller adopts hydraulic, hydraulic or mechanical transmission system, single shaft or full shaft drive, wide base tire articulated frame structure three-point support. The compaction process has the effect of kneading, so that the particles of the compaction layer are not destroyed and embedded, and are uniformly dense. Good mobility, fast travel speed (up to 25 km/h), used for road, airport and other engineering cushion compaction.

The towed vibratory roller can effectively compact all kinds of soil and rock fill, and is suitable for the construction of modern highways, airports, embankment fill, seaports, DAMS, railways, mines and other projects.

A press roller with many bumps on the roller. Because the convex block is shaped like sheep's foot, it is called sheep's foot roller, also known as sheep's foot roller. The convex block shapes are sheep foot shape, cylindrical shape and square column shape. The roller shaft is supported on the bearing of the traction frame to expand the range of use. The roller can be filled with water, sand or iron sand to increase the rolling weight. A comb scraper is arranged under the frame before and after the roller to remove the mud stuck between the bumps.

Towed sheepfoot roller is towed by a tractor. Self-propelled sheepfoot rollers are also called compacting rollers. The unit pressure of sheep foot roller is large, so that the packing is uniform, there is a compaction effect, and the compaction degree is large, especially for hard clay, suitable for compacting cohesive soil and gravel layer. Especially for hard clay, the convex block has the effect of stirring, kneading and ramming, and has the effect of ramming, so that the filler is uniform, and the upper and lower bedding layer is bonded to avoid delamination. It is widely used for compaction of roadbed, cushion and dam.

The self-propelled sheep foot roller can also be installed in the roller exciting device, made of vibration compaction roller, the use of exciting force to increase the compaction effect, the roller can be loaded with water, sand or iron sand to increase the rolling weight. Expand the scope of use.

The main technical parameters of sheep foot roller are machine weight and unit pressure. Because the convex block looks like sheep's foot, it is called sheep's foot roller

1. Compaction of the foundation of roads, railways, DAMS, airports, buildings, factories and residential buildings.

2. Compaction of cement plant waste, ash, coal and other bulk storage site.

3. Compaction of soil and rock with relatively wide water content.

4. Compaction of rock, clay and expansive soil.

5. Flame-retardant compaction of open coal seam.