What Is a Road Roller?

Road roller is also called soil compactor, which is a kind of road repairing equipment. Road rollers belong to the category of road equipment in construction machinery, and are widely used in the filling and compaction of large-scale engineering projects such as high-grade highways, railways, airport runways, dams, stadiums, etc., and can compact sandy, semi-viscous and cohesive soil, Subgrade stabilized soil and asphalt concrete pavement layer. The roller uses the gravity of the machine itself to apply to various compaction operations, which will cause the laminated layer to be permanently deformed and compacted. The rollers are divided into steel wheels and tires.

As early as ancient times, people used the hoofs and feet of herds to trample, rub, and tamp the soil to treat the foundations of houses, and to compact dams and river banks. Before the middle of the 19th century, road engineering in the West used gravel. Sub-paving is mainly used for natural compaction by vehicles. It was not until the invention of the stone-rolling machine in 1858 that the development of gravel roads was promoted, and then the compaction work with horse-drawn rollers gradually appeared. This is the earliest The prototype of the roller, which appeared in France in 1860, further promoted and improved the construction technology and quality of gravel pavement, and accelerated the progress. At the beginning of the 20th century, the world recognized the gravel pavement as the best pavement at that time and spread it all over the world. The concept of compaction gradually became known, and road rollers also appeared on various road construction sites. In the mid-19th century, the invention of the internal combustion engine Bring great vitality to the development of compaction equipment. The first internal combustion engine-powered roller was born in the early 20th century. What followed was

1. During operation, the roller should start before it can start to shake, and the internal combustion engine should be set at medium speed before adjusting to high speed.

2. Stop the machine first when changing speed and changing direction, and reduce the engine speed when changing speed.

3. It is strictly forbidden for the roller to vibrate on solid ground.

4. When rolling loose roadbeds, they should be rolled 1 or 2 times without vibration, and then rolled with vibration.

5. When rolling, the vibration frequency should be consistent. For the vibratory roller that can be adjusted, you should adjust the vibration frequency before you work, and you must not adjust the vibration frequency without vibration.

6, commutation

The low temperature makes it difficult to start the engine. The main reasons are the increased viscosity of the lubricating oil, the decline in the battery's ability to work, and poor fuel atomization.

The viscosity of the engine oil increases as the temperature decreases, and the flow performance becomes worse. As a result, the engine lubrication conditions are deteriorated and the crankshaft's rotational resistance is increased.

When the battery is at a low temperature, the viscosity of the electrolyte also increases, the permeability decreases, and the increase in internal resistance significantly reduces the battery capacity and terminal voltage, and even fails to discharge. The voltage drop makes the starter unable to obtain the required output power, and it is difficult to meet the requirements of the starting speed.

Due to the low temperature, the crankshaft rotation speed of the engine is not high, the temperature of the intake pipe and the gas flow rate are low, and the atomization quality of the fuel is poor, which further increases the difficulty of starting the engine.

Under low temperature conditions, various oils have high viscosity and poor fluidity, which makes the operation of the roller difficult and exacerbates the wear of the parts.

The viscosity of the lubricating oil is large, and the power loss of oil stirring is increased during the operation of the mechanism, which reduces the engine power and reduces the efficiency of the transmission system, thereby reducing the driving ability of the roller walking and excitation mechanism.

The poor fluidity of the lubricating oil adds difficulty to the lubrication of certain components and reduces the lubrication effect, thereby exacerbating the wear of the engine and transmission parts.

The high viscosity of the working oil also increases the resistance of the pipeline, making the hydraulic steering difficult, the efficiency of the hydraulically driven brakes worsening, adding difficulties to driving, and adversely affecting safe driving.

There are also widespread freezing hazards during construction in cold seasons, for example: freezing of the electrolyte of the battery will cause it to stop working; freezing of the cooling water of the water-cooled engine will freeze and crack the radiator and the cylinder block.