The Working Mechanism Of a Roller Compactor
Roller compactors can be used to have both dry and wet compaction. In dry compaction, the air in the soil is removed while in the case of wet compaction the voids in soil are removed by replacing them with water until the optimist moisture content is achieved.
There are essentially two types of roller compactor that are differentiated from each other in terms of their handling and maneuvering. These two types are:
- Ride-on roller compactors
- Walk-behind roller compactors.
In this section, we would be focusing on the working of both these two types.
Ride-on roller compactors
Ride-on roller drums are vehicles supported on a smooth drum-shaped wheel. The engine is located in the front part while the operator’s cabin is on the rear side.
Both the front and the rear sides are connected through an articulation joint. The articulation joint can rotate to control the maneuvering of the roller. The rotation of the articulation joint is controlled through the steering ram which is provided in the operator’s cabin. The operator then rotates the steering to control the direction of rollers. Unlike normal cares where steering rotates the tires, in roller complete front part of the machine is rotated using an articulation joint.
The operator cabin has also a gearbox installed to control the speed of the roller in both forwards and reverse direction. The fuel tank is located underneath the driver’s feet while a fuel gauge is provided in the operator’s cabin. The rest of the engine control is also provided in the operator’s cabin.
Rollers are mostly diesel-powered along with special hydraulic systems installed. These hydraulic systems are mainly provided for braking the rollers.
Walk-behind roller compactors
As the name indicates, these walk-behind rollers are steered by forces coming from the operator’s hand.
They are single drum wheel-mounted vehicles. The single drum wheel is attached underneath the engine. The engine is then connected to the forward travel lever using the handlebar.
To allow traveling in the forward direction, the lever bar is squeezed. For stopping the roller rotation, the level bar is released. The lever bar can be assumed as a circuit breaker. When you squeeze it the circuit is complete and the roller wheel starts to rotate. When you release it, the circuit is broken so the wheel stops moving.
There is also an emergency stop button located near the lever. The roller also a small drum installed on its front called a stabilizer roller. It is not powered. It aids the roller in keeping itself stable and simplifies the handling process.
This type of roller usually also has a water sprinkler system. It is used for wet compaction. The roller can be either diesel-powered or battery-powered.