Excavator - the most common type of earth-moving self-propelled machines, it is designed for an autopsy, mining, excavation, development of the soil, digging pits.The machines can work with rocks, soft soils, minerals, ore rocks.
Excavators are machines with attachments, designed for simultaneous cutting and excavation.There are single bucket and multi excavators.One-bucket - a car cyclical action.They periodically repeating the same movement.Bucket produce more action, they can be milling, scraping and directly Bucket.
Excavators with one bucket classified according to purpose.Construction and purpose - the most commonly used for the majority of excavation.Shovels are needed for mining coal and ore.With stripping work with the upper layers of the soil.
Rotary excavators are multi-bucket technique.What is the difference?Why do some jobs better to prefer this kind of technology?
rotary excavator is used for stripping operations, mining ground.And the first and the second type of work they can perform either the upper or lower digging.Earth-moving machinery such types are used for the transportation of minerals or rock, digging canals, trenching, rock loading or removing it into dump.
rotary excavator has a higher efficiency and, consequently, the development of soil becomes less costly, but more productive.Number osypok ladle in such models is considerably less better emptying of the bucket, but it also increases productivity and reduces power consumption.
rotary excavator can be rail-walking or crawler.To delete or opening rock dumps facilities, loading and other work it is equipped with an arrow (retractable or non-rising).
idea of creating a bucket wheel excavator came from ancient times, if you look closely at the machine, you will notice a strong resemblance to the ancient wheel with which our ancestors raised the water.Author draws the wheel, the circuit which was the basis of the drawings of self-propelled machines was Leonardo da Vinci.
rotary excavator working with soil or rock buckets are mounted on the wheel (rotor).The rotor, in turn, rotates in the direction that is most effective for the contact with the slaughter.For the upper digging - this direction coincides with the direction clockwise to the bottom - opposite.
During the executive body of the bucket wheel excavator can move horizontally and vertically.
machines adapted for transverse or radial digging, different mode of feeding for slaughter, productivity, the amount of change of the horizon, the type of movement (undercarriage).
addition, the rotors are different in the way they are used for unloading buckets.Unloading is carried out one by gravity, which acts on the rock when the bucket passes through the top point of the discharge zone.In machines inertial ladle is discharged by centrifugal force, which throws the rock from the bucket.In order to discharge the inertia is constant, it is necessary to provide a rotor speed, the centrifugal force to become greater than the force of gravity.
Raising or lowering the boom (moldboard and rotor) made through the tackles using installed on the boom balances.Pulley system, mast, in which the supporting arm, and the turntable together constitute the superstructure of the excavator.
topsides using slewing device firmly attached to the chassis, rotatable through 360 °.Dumping conveyor equipped with its own rotary drive.This allows the actuator arm to deviate from its longitudinal axis by 270 °, while maintaining a predetermined position in space, regardless of how the rotary arm is located.
