Gear pumps are positive displacement pumps that utilize rotating gears to generate hydraulic flow.
They are commonly used in hydraulic systems due to their simplicity, efficiency, and reliability. The gear pump employed in the CAT320B and CAT320C is designed to meet the demanding requirements of excavator operations.
One of the key specifications of the gear pump is its displacement capacity. The CAT320B and CAT320C gear pumps typically have a displacement of around 114 cc/rev (cubic centimeters per revolution). This indicates the volume of hydraulic fluid that the pump can deliver per revolution of its gears. The displacement capacity determines the flow rate of the hydraulic system, which affects the speed and force of the excavator's various hydraulic functions, such as bucket operation, arm movement, and boom lifting.
The gear pump is driven by the excavator's engine through a power take-off (PTO) mechanism. The PTO transfers rotational power from the engine to the pump, enabling it to generate hydraulic pressure. The CAT320B and CAT320C gear pumps are designed to operate at the engine's rated speed, which is typically around 2000-2200 RPM (revolutions per minute). This ensures optimal pump performance and efficient power transfer.
To withstand the rigors of heavy-duty excavator operations, the gear pump is constructed with high-quality materials. The pump body and gears are made from durable alloy steel, providing excellent strength and wear resistance. This allows the pump to withstand high pressures and maintain reliable operation even under demanding conditions.
The CAT320B and CAT320C gear pumps are designed for a maximum operating pressure of approximately 3500 psi (pounds per square inch).
This pressure rating determines the hydraulic system's overall power and capability. Higher operating pressures enable the excavator to exert greater force, enhancing its digging and lifting performance.
Efficiency is a crucial aspect of any hydraulic system, and the gear pump used in the CAT320B and CAT320C is designed to minimize energy losses. The pump's internal clearances are precisely engineered to reduce internal leakage, ensuring that the majority of the hydraulic power generated is effectively transmitted to the excavator's actuators. This optimizes the system's overall efficiency and contributes to fuel savings.
Furthermore, the gear pump incorporates advanced sealing technologies to prevent fluid leakage and maintain system integrity. High-quality seals and O-rings are utilized at critical points to ensure reliable sealing under pressure. This minimizes the risk of hydraulic fluid leakage, which can lead to performance issues and environmental contamination.