The common excavators are driven by an internal combustion engine driven excavator and electric drive excavator two types. The electric excavator is mainly used in plateau hypoxia and underground mine and other inflammable and explosive places.
Depending on size, excavators can be divided into large excavators, medium excavators and small excavators
In accordance with the different way of walking, excavators can be divided into crawler-type excavators and wheeled excavators.
According to the different transmission mode, excavators can be divided into hydraulic excavators and mechanical excavators. Mechanical excavators are mainly used in some large mines.
According to the use of points, excavators can be divided into universal excavators, mining excavators, marine excavators, special excavators and other types of
According to the bucket, excavators can be divided into shovel excavators, backhoe excavators, backhoe excavators and backhoe excavators. The shovel excavator is used to excavate the material above the surface, and the backhoe digger is used to excavate the material below the surface.
1 Backhoe Excavator Backhoe is the most common we have seen, backward downward, forced to cut the Earth. Can be used for the operation of the following mining operations, the basic operation methods are: ditch mining, ditch side mining, straight-line mining, curve mining, maintain a certain angle excavation, deep trench excavation and trench excavation.
2 Shovel Excavator
Shovel soil action form of shovel digger. It is characterized by "advancing upward, forcing the earth to cut". Shovel excavation force, can be excavated above the surface of the earth, should be used for excavation height of more than 2m dry foundation pit, but must be set up up and down ramp. The scoop of the shovel is larger than that of the backhoe excavator with the same equivalent, and the water content of the excavation can not be greater than 27%
To three types of soil, and with the dump truck with the completion of the entire excavation transport operations, but also can be excavated large-scale dry foundation pit and mound and so on. Excavation method of shovel excavator according to the difference of the relative position between the excavation route and the transport vehicle, there are two ways to dig and unload the Earth: forward excavation, lateral unloading;
3. Pull Shovel Excavator
The backhoe Digger is also called a shovel digger. Its excavation characteristic is: "Backward downward, the self-respect cuts the Earth". It is suitable for excavating the Ⅰ and Ⅱ type soil below the shutdown surface. At work, the use of inertia force will be thrown out of the bucket, digging more far, the excavation radius and excavation depth is larger, but not as flexible and accurate backhoe. Especially suitable for excavation of large deep foundation pits or underwater excavations.
4. Grasping Shovel Excavator
Backhoe excavators are also called grab excavators. Its excavation characteristic is: "Up, the self-respect cuts the soil". It is suitable for excavation of Ⅰ and Ⅱ-type soil below the shutdown surface, which is often used in soft soil area for excavation, sinking well and so on. It is especially suitable for digging deep and narrow foundation pits, dredging old channels and dredging silt in water, etc., or for loading gravel, slag and other loose materials. Excavation method has two kinds of trench excavation and location excavation. If the grab bucket is made into a grid bar, it can also be used for the storage yard loading rock, wood, timber and so on.
Today's excavators account for most of the full hydraulic full swing excavator. The hydraulic excavator is mainly composed of engine, hydraulic system, working device, walking device and electric control part. Hydraulic system consists of hydraulic pump, control valve, hydraulic cylinder, hydraulic motor, pipeline, fuel tank and so on. The electrical control system includes a monitoring panel, an engine control system, a pump control system, a variety of sensors, solenoid valves and so on.
The hydraulic excavator is generally composed of three parts, the working device, the upper body and the lower body. According to its structure and use can be divided into: crawler-type, tire-type, walking, full hydraulic, semi-hydraulic, full rotation, non-full rotation, general-purpose, special-purpose, articulated, telescopic arm type and many other types.
A working device is a device that directly completes a mining task. It is hinged by three parts, such as a moving arm, a bucket rod, a bucket, etc. In order to meet the needs of different construction operations, hydraulic excavators can be fitted with a variety of working devices, such as mining, lifting, loading, leveling, clamp, bulldozing, impact Hammer, rotary drilling and other operating equipment.
Rotary and walking device is the body of hydraulic excavator, the turntable is equipped with power plant and transmission system. The engine is the power source of the hydraulic excavator, most uses the diesel to be in the convenient ground, also may change the electricity motive.
Hydraulic transmission system through the hydraulic pump to the engine power transmission to the hydraulic motor, hydraulic cylinder, such as the implementation of components, to promote the operation of the device to complete a variety of operations.