Charge Pumps

2 week ago

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4 year

Product details

A4VG180+180, A4VG180+125, and A4VG180+28 are combinations of Bosch Rexroth's A4VG series axial piston variable displacement pumps with different specifications of charge pumps, primarily designed for closed-circuit hydraulic systems.Below is the detailed information:

I. Product Overview

• A4VG Series Axial Piston Variable Displacement Pumps:

• Type: High-pressure axial piston variable displacement pumps specifically engineered for closed-loop hydraulic drives.

• Displacement Specifications: Available in a variety of displacement options, including A4VG28, A4VG40, A4VG45, A4VG56, A4VG71, A4VG90, A4VG125, A4VG180, A4VG250, etc.

• Features: Boast high pressure, high efficiency, low noise, and long service life. They employ a swashplate design that enables stepless adjustment of displacement by varying the swashplate angle.

• Charge Pumps:

• Function: In closed-circuit hydraulic systems, charge pumps are used to replenish system leakage, maintain system pressure balance, and ensure normal system operation.

• Type: Typically integrated with the main pump to form a combined pump unit. The displacement of the charge pump is generally smaller to meet the needs of compensating for system leakage.

• A4VG180+28:

• Main Pump Displacement: 180 cm³/rev.

• Charge Pump Displacement: 28 cm³/rev. This is a common combination where the charge pump has a smaller displacement, primarily used to compensate for system leakage.

III. Application Areas

These pump combinations are widely used in scenarios requiring high-pressure, large-flow hydraulic power, such as:

• Construction Machinery: Excavators, cranes, concrete pump trucks, etc.

• Industrial Equipment: Injection molding machines, die-casting machines, metallurgical machinery, etc.

• Marine and Offshore Engineering: Ship propulsion systems, offshore platform hydraulic systems, etc.

IV. Technical Features and Advantages

• High Pressure and Efficiency: Rated for high working pressures to meet demanding conditions, while their design ensures high efficiency and reduced energy loss.

• Low Noise and Long Service Life: The swashplate design and optimized suction characteristics contribute to low noise levels and extended bearing life.

• Modular Design: Compact structure with flexible mounting options, facilitating easy integration into hydraulic systems.

• Precise Control: Stepless adjustment of displacement through swashplate angle variation enables precise control over system flow and pressure.

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