Hydraulic Drive System Components of the hydraulic clamshell grab
Power Unit:
An electric motor (25 HP, as specified) provides initial mechanical energy to drive the hydraulic pump.
The hydraulic pump (45 LPM, as specified) converts the mechanical energy into hydraulic energy, supplying pressurized oil to the system.
Actuation Unit:
The hydraulic cylinder, as the core actuator, is directly connected to the grab bucket flaps.
The extension and retraction motion of the cylinder is converted into the opening and closing action of the flaps, realizing the grabbing and release of materials.
Control Unit:
The hydraulic control valve of the hydraulic clamshell grab assembly (multi-way valve, proportional valve, etc.) is responsible for regulating the direction, flow rate, and pressure of the hydraulic fluid, thereby controlling the opening and closing speed, force, and position.
The hydraulic oil tank (as shown in the specifications: 170 L) stores and cools the hydraulic oil, ensuring stable system operation.
Closing and Grabbing Phase: Operation commands are issued through the control system. Hydraulic oil, driven by the pump, enters the rodless chamber of the cylinder through the control valve.
The cylinder piston rod retracts under hydraulic pressure, causing the two side flaps to close around the hinge point towards the center via a linkage mechanism.
The tips or cutting edges of the flaps cut into the material, achieving a full-load grab under the strong closing force.
Holding and Lifting Phase: After the hydraulic clamshell grab closes, the hydraulic system maintains pressure, keeping the flaps tightly closed during lifting and translation to prevent material spillage.
The entire unit is then lifted to the target location by lifting equipment (such as a crane).
