The HD-A4VSO Axial Piston Pump utilizes a high-performance swash plate design, specifically engineered for hydrostatic transmissions in open circuit operations. Renowned for its precision and adaptability, the flow is directly proportional to the input drive speed and displacement. By adjusting the swash plate angle, operators can achieve infinitely variable output flow, making it a cornerstone for systems requiring exact power management.

Working Principle: Swash Plate Technology

The A4VSO functions via the axial piston principle. Inside the rotating cylinder block, multiple pistons are positioned in a circular formation. As the input shaft drives the cylinder block, the pistons perform a reciprocating motion governed by the angle of the adjustable swash plate:

• Variable Displacement: Increasing the swash plate tilt extends piston movement, drawing and pushing larger volumes of hydraulic fluid.
• Precision Control: When the swash plate reaches the zero position, piston movement ceases, and fluid displacement stops.
• Energy Efficiency: This mechanism allows the pump to match system requirements exactly, reducing energy waste while maintaining high efficiency.

Key Technical Features

• High Pressure Capability: Designed for a permissible continuous operating pressure of 350 bar.
• Robust Drive Shaft: The heavy-duty drive shaft is engineered to absorb both axial and radial loads, ensuring stability under stress.
• High Power-to-Weight Ratio: Delivers massive hydraulic power within a compact and manageable frame.
• Modular Design: Offers ultimate flexibility with optional pump and mounting positions, plus the capability for multi-pump combinations.
• Low Noise & Long Life: Precision slot-control and high-quality materials ensure a quiet workspace and an extended service life.
• Specialized Fluid Operation: Potential for operation on HFC fluids under reduced parameters (in preparation)