The lar excavator in that world

He worked hard in Bo Gartell Coal Mine, the world's largest coal mine, making him the world's largest excavator. It is a bucket wheel excavator with a weight of 45,000 tons and a height of about 4 floors.

The largest excavator

The world's largest saw was found on a heavy machine in Bogatyr coal mine. Bogatyr coal mine is the largest coal mine in the world, located near the city of Ekibastrou.

Photographers discover coal mines in Kazakhstan? Big monster? From the outside, this? Big monster? It is huge, weighing 45,000 tons, and it is about four stories high.

Should? Big monster? Known as bucket wheel excavator, it has wonderful devices and exquisite design, and a huge rotating wheel is installed in front of it. The diameter of the saw in the rotating wheel is12m. The weight of the whole machine is 45,000 tons and the height is 45 meters, which is equivalent to the height of four floors. The outermost edge of the machine is a series of spoon-shaped or barrel-shaped devices that load and unload coal through the conveyor belt. This machine has a strong working ability and can dig 4500 tons of coal per hour. It can clear all obstacles ahead, even high mines.

However, it costs 66 million pounds to produce such a machine, and the whole machine needs 27 miners to complete it. Because of its huge size and slow movement, it can only move forward 1 mile (about 1.6 km) every 3 hours.

relevant information

Bucket wheel excavator

Bucket wheel excavator is an important equipment to complete the mining work in the process of continuous mining, transportation and drainage. It is used for large-scale projects with large mining volume and long service life, especially for open pit mines and large-scale earthwork. The crawler bucket wheel excavator appears in 19 16. 19 19 years or so, Germany made the first crawler bucket wheel excavator. Bucket wheel excavator is mainly composed of power, walking, working, rotating and conveying devices. Bucket wheel excavator is an efficient digging equipment, which is equipped with a digging and transportation system composed of cars or belt conveyors. It is mainly used for stripping and excavation of coal and oil shale in open-pit mines and earthwork excavation of large-scale water conservancy and construction projects.

Basic introduction

Multi-bucket excavator uses the combined movement of bucket wheel rotation and boom rotation to make the bucket dig hard materials continuously. Bucket wheel excavator is an efficient digging equipment, which is equipped with a digging and transportation system composed of cars or belt conveyors. It is mainly used for stripping and excavation of coal and oil shale in open-pit mines and earthwork excavation of large-scale water conservancy and construction projects. The main technical parameters of bucket wheel excavator are productivity, digging height and unit cutting force.

Development history

Bucket wheel excavator is developed on the basis of single bucket excavator and ring wheel excavator (see multi-bucket excavator).

The crawler bucket wheel excavator appears in 19 16.

19 19 years or so, Germany made the first crawler bucket wheel excavator.

In 1950s, small and medium-sized bucket wheel excavators developed rapidly.

1975, the Federal Republic of Germany produced 200,000 cubic meters/day bucket wheel excavators.

1977, a giant bucket wheel excavator with a capacity of 240,000 cubic meters/day was successfully developed, and the whole machine was about 1300 tons. This is the largest bucket wheel excavator in the world in the early 1980s.

June 20 15, the world's largest bucket wheel excavator is now located in Bogatyr coal mine in Eki Bastou, with a weight of 45,000 tons and can dig 4,500 tons of coal per hour.

Basic structure

Bucket wheel excavator is mainly composed of power, walking, working, rotating and conveying devices.

1. power plant: except some small bucket wheel excavators use diesel generator sets, others are external power conversion sets;

2. Walking devices: most of them are crawler type, and a few are walking type. Small and medium-sized machines mostly use double tracks. Large-scale use of multiple tracks to reduce the specific pressure of the machine to the ground;

3. Working device: It consists of bucket wheel, boom, luffing mechanism and bucket wheel driving device. Bucket wheel is a wheel with several buckets evenly distributed on the circumference, which is installed at the front end of the boom. The back end of the boom is hinged on the gantry of the turntable, and the boom is tilted by the oil cylinder or wire rope to change the tilt angle, so that the bucket wheel can dig on different working faces. The length of the boom is fixed and can be extended and contracted. The bucket wheel drive device consists of a motor, a safety coupling and a reducer, which is installed at the front end side of the boom and used for driving the bucket wheel to rotate. The above structure is basically the same as the working device of bucket wheel stacker-reclaimer, but the bucket wheel excavator directly digs ore, which has large cutting force and poor working conditions, so the structural strength is much higher than that of bucket wheel stacker-reclaimer, and the driving power is much higher, and the structural form is more complicated;

4. Rotating device: composed of turntable and rotating drive device. The turntable is provided with a power device, a driving device, control equipment and a control room. The driving device can make the turntable rotate 360 degrees around the vertical axis. ;

5. Conveyor: It consists of receiving conveyor belt, hopper and discharging conveyor belt. Connecting bridge bucket wheel excavator is also equipped with transfer conveyor belt on the connecting bridge.

principle of operation

When digging, the machine does not walk, and the material is continuously cut and loaded into the bucket by means of the compound movement composed of bucket wheel rotation and boom rotation. When the bucket rotates with the bucket wheel to a certain height, the material falls to the receiving conveyor belt by its own weight, and then is discharged to the discharging conveyor belt through the hopper, loaded into vehicles such as automobiles or conveyors, and transported to the designated place. After the first layer of material is dug, the machine moves or the boom falls, and then the next layer of material is dug, so that it is dug from the top layer by layer. The thickness of the excavated material is controlled by the advancing distance of the machine or the telescopic amount of the boom. The width is determined by the rotating speed, and the height is generally not more than 0.7 times the diameter of the bucket wheel. The walking of bucket wheel excavator is auxiliary and the operation is continuous. The bucket is only used for digging. Materials are transported by belt conveyor, with low energy consumption.

classify

Bucket wheel excavator can be divided into cantilever type and connecting bridge type according to the form of unloading device;

Cantilever bucket wheel excavator is usually called ordinary bucket wheel excavator, which belongs to small and medium-sized equipment, and its productivity is below 2500 cubic meters per hour.

The connecting bridge is called bucket wheel excavator group, which consists of bucket wheel excavator, connecting bridge and transfer machine. Most of them are large-scale equipment, and the productivity is above 2500 cubic meters per hour.