Most of today's excavators are fully hydraulic full-slewing excavators. Hydraulic excavators are mainly composed of engine, hydraulic system, working device, walking device and electrical control. The hydraulic system consists of a hydraulic pump, a control valve, a hydraulic cylinder, a hydraulic motor, a pipeline, a fuel tank, and the like. The electrical control system includes a monitoring panel, an engine control system, a pump control system, various types of sensors, and solenoid valves.
The hydraulic excavator generally consists of three parts: the working device, the upper body and the lower body. According to its structure and use, it can be divided into: crawler type, tire type, walking type, full hydraulic, semi-hydraulic, full rotation, non-full rotation, general purpose, special type, articulated type, telescopic arm type and so on.
The working device is a device that directly performs the excavation task. It is hinged by three parts: boom, stick and bucket. In order to meet the needs of various construction operations, hydraulic excavators can be equipped with a variety of work equipment, such as digging, lifting, loading, leveling, clamping, dozing, impact hammer, rotary drilling and other work tools.
The swing and travel device is the body of the hydraulic excavator, and the power unit and the transmission system are arranged on the upper part of the turntable. The engine is the power source of the hydraulic excavator. Most of the diesel is used in a convenient place, and the electric motor can be used instead.
The hydraulic transmission system transmits the power of the engine to the actuators such as the hydraulic motor and the hydraulic cylinder through the hydraulic pump, and pushes the working device to perform various operations.