Used construction machine used excavator main control valve distribution valve function

1. Control the flow direction of hydraulic oil
The distribution valve distributes hydraulic oil to different actuators (such as boom, dipper, bucket, swing motor, etc.) according to the operation instructions to ensure that each component moves as required.

2. Adjust the flow of hydraulic oil
The flow of hydraulic oil is adjusted by the opening of the valve core to control the movement speed of the actuator and achieve fine operation.

3. Adjust the pressure of hydraulic oil
The distribution valve has a built-in pressure regulating device (such as a safety valve and an overload valve) to prevent the system pressure from being too high and protect the hydraulic components from damage.

4. Realize compound actions
The distribution valve allows multiple actuators to work simultaneously, such as boom lifting and dipper recovery, to improve work efficiency.

5. Keep the system stable
The distribution valve ensures stable operation of the system under different loads through pressure compensation and flow control, avoiding pressure fluctuations and uncoordinated movements.

6. Energy saving and efficiency improvement
Modern distribution valves use load-sensitive technology to adjust flow and pressure according to actual needs, reduce energy loss and improve efficiency.

7. Safety protection
The distribution valve has built-in safety valves and overload protection devices to prevent system overpressure or overload, ensuring the safety of equipment and operators.

Main components
Valve body: main structure, including oil channel and valve core.

Valve core: controls the opening and closing of the oil channel, adjusts flow and direction.

Spring: used for valve core reset and pressure regulation.

Pressure regulating device: such as safety valve and overload valve, used for pressure control.

Control mechanism: such as handle and solenoid valve, used to operate the valve core.

Summary
The distribution valve is the core of the excavator hydraulic system, responsible for controlling the flow direction, flow and pressure of the hydraulic oil, ensuring that each actuator works as required, while providing safety protection and energy saving functions. Its performance directly affects the operating efficiency and stability of the excavator.