Spool Ass’y,Arm1

The design and function of the excavator boom valve core components are mainly reflected in the following aspects:

1. Regeneration circuit control: There is a regeneration circuit on the boom retraction circuit. When the boom descends, the pressure oil at the top of the boom cylinder is supplied to the bottom of the cylinder together with the pressure oil output by the pump, accelerating the descent speed of the boom and improving work efficiency.
2. Excavation force adjustment: The radial small hole on the boom valve core connects the rod cavity and rodless cavity of the boom. The one-way valve on the boom valve core controls the flow direction, realizing the opening or closing of the regeneration function. When a small excavation force is needed, the regeneration function is used to improve efficiency with a large flow rate, achieving energy saving. When a large excavation force is needed, the regeneration function is closed to reduce back pressure and increase excavation force.
3. Pressure compensation: The pressure compensation valve acts as a load balancer during compound actions, generating pressure drop by reducing the flow area, making the pressure difference between the two directional valves equal, avoiding pressure oil only flowing to the directional valve with lighter load, and ensuring the flow is distributed proportionally based on the opening of the two directional valve cores, ensuring no interference between the various actuating elements and good operability.

In conclusion, the excavator boom valve core components achieve efficient operation of the boom and precise control of excavation force through precise control and adjustment, making them an indispensable and important component of excavators.