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Home>>news>>The Working Device of Used Excavator

The Working Device of Used Excavator

Tags: the best excavators used kobelco excavators for sale2014-01-23

Hydraulic used excavator is mainly composed of the engine, hydraulic system, working device, walking device, electric control parts and so on. Hydraulic system consists of hydraulic pump, control valve, hydraulic cylinder, hydraulic motor, piping, tanks and so on. Hydraulic excavator is generally composed of working device, rotary device and walking device. According to the structure and application of the used excavator can be divided into caterpillar, tyred, walking, hydraulic, rotary, general, special, articulated, telescopic jib type and other types.

The working device of the used excavator is the device for mining tasks directly. It is composed of three parts, movable arm, arm and bucket hinge. All of the movable arm ups and downs, the length of arm and bucket rotating reciprocating of this kind of excavator are controlled by double-acting hydraulic cylinder. In order to meet the needs of various construction, the hydraulic used excavators can be installed with a variety of working device, such as mining, lifting, level off, clamp, loading, bulldozing, impact hammer, other operation equipment and so on.

The rotary and the walking device are the two parts of the body of the hydraulic used excavator. Also, the upper turntable should install the power plant and driving system. The excavator's power source is the engine. The diesel at a convenient site is applied for the used excavator. The hydraulic drive system transfers the engine power to the hydraulic motor and hydraulic cylinder actuators through the hydraulic pump to promote the working device of the used Kobelco excavators so as to complete all assignments. How does the used excavator system work? There are three parts of the used excavator; they are hydraulic cylinder, movable arm, arm and bucket. There are three hydraulic motor, walking around and a rotary of used excavator. All of these are made of reversing valve control oil supply. The oil from the hydraulic pump can be distributed to different actuators by reversing valve. Most of the directional valves of the used excavator are hydraulic control, which uses smaller pressure oil driving reversing valve core. Generally, the medium-sized excavators adopt triplex pump and two large pumps for working pressure.

A small pump provides oil to controlled road of used excavator. The control valve at the bottom of the handle can control the oil to adjust the position of the valve core in the main hydraulic system so as to expand the movable arm and the bucket cylinder. And to stop the rotated direction of the hydraulic motor the main lines of the used kobelco excavators are equipped by the overflow. The limited valve will be open and the oil will be back to the tank directly when the pressure is over. So the pressure of the system can always keep in a certain range. Not only the used excavator, also other hydraulic system, both of their working principles are the same.

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