Road Roller Classification
The road roller is a heavy mechanical equipment used for rolling compaction. Its working principle is mainly to compact the sandy, semi-clay soil or asphalt concrete pavement with the help of its own gravity.
Road roller classification
Rollers can be divided into vibratory rollers (rolling) and static rollers (rolling) in large aspects. Vibratory rollers can be divided into 2 amplitudes, 6 amplitudes and 8 amplitudes. Model.
There are also differentiating according to drive mode, transmission mode, operation mode, etc., such as full drive or rear drive, hydraulic or mechanical, etc.
There are single steel wheels and double steel wheels for vibration rolling, but these two can also be used for static rolling without excitation. The rubber roller is specially used for static rolling.
The conventional use is: single steel wheels are used for roadbed, double steel wheels and rubber wheels are used for oil surface. However, the double steel wheels and rubber wheels will also be used on the roadbed according to different construction techniques and materials.
Static pressure roller
It is suitable for static pressure rollers due to the gravity of the machine itself.
Various compaction operations make the compacted layer permanently deformed and dense. It is divided into steel wheel type and tire type.
Steel wheel roller
Steel wheel roller
The rollers are constructed of light rollers, groove rollers and sheep foot rollers. Light rollers are the most common application, mainly used for road vibration rollers. Adopting mechanical or hydraulic transmission, it can concentrate the force to compact the protruding part, with high compactness and flatness, suitable for compaction of asphalt pavement
According to the axle, there are single-axis single-wheel, double-axis double-wheel, double-axis three-wheel and three-axis three-wheel. Powered by an internal combustion engine, mechanical transmission or hydraulic transmission is used. Generally, the front wheels are steered with good maneuverability and the rear wheels are driven. In order to improve steering and rolling performance, articulated steering structure and all-wheel drive should be adopted. The front wheel frame and frame are articulated to reduce fuselage swing on uneven roads. The rear wheel and frame are rigidly connected. Adopt hydraulic operation and control steering with hydraulic cylinder. The front and rear rollers are equipped with scrapers to remove the adhesive on the rollers. It is also equipped with a water spray system for spraying water to the rollers to prevent the asphalt mixture from adhering when compacting the asphalt pavement. In order to increase the force, iron, sand, water, etc. can be added to the wheel to increase the weight.
The main technical parameters of steel wheel rollers are machine weight and line pressure. In the 1980s, the weight range of various steel wheel rollers was about: 2 to 13 tons for two-wheel rollers, 1 to 15 tons for three-wheel rollers, and 1 to 3 tons for pressurization as needed, and 13 to 14 tons for three-axis three-wheel roller After pressurization, it is 18 to 19 tons.
Pneumatic tires are used for rolling wheels, usually 3 to 5 front wheels and 4 to 6 rear wheels. If the inflation pressure is changed, the ground pressure of the tire roller can be changed, and the pressure adjustment range is 0.11 to 1.05 MPa. The tire roller adopts hydraulic, hydraulic or mechanical transmission system, single-axis or full-axis drive, and three-point support of the wide-base tire articulated frame structure. The compaction process has a rubbing effect, so that the particles of the compacted layer are embedded without being damaged, and are evenly and densely packed. It has good maneuverability and fast travel speed (up to 25km / h), and is used for compaction of engineering cushions such as roads and airports.