FIXED FLOW AXIAL PISTON PUMPS

An axial piston pump is a specific type of positive displacement pump that moves fluid using pistons arranged parallel to the drive shaft. This design allows for:

• High Pressure Capability: Easily handling pressures exceeding 400-450 bar.
• High Efficiency: Offering superior volumetric efficiency compared to gear or vane pumps.
• Compact Power: Delivering high power density in a relatively small footprint.

These characteristics make them the top choice for heavy-duty applications like cranes, excavators, and industrial presses.

To grasp the capabilities of axial pumps, it's important to understand the fundamental operating cycle:

1. Intake Stroke: As the cylinder block rotates, pistons are pulled out of their bores (due to the swash plate angle or bent axis), creating a vacuum that draws oil into the cylinder.
2. Discharge Stroke: As rotation continues, the angle forces the pistons back into the bores, compressing the oil and pushing it out through the discharge port at high pressure.
3. Continuous Flow: The multi-piston design ensures a smooth, continuous flow of hydraulic power.

Axial flow pumps offer several key benefits for high-performance hydraulic scenarios:

• Variable Displacement: Many models allow the flow rate to be adjusted without changing engine speed, saving energy.
• Durability: Designed to withstand shock loads and harsh operating conditions.
• Versatility: Suitable for both open and closed circuit hydraulic systems.
• Precise Control: Offers excellent control over flow and pressure for sensitive machinery operations.

Choosing the right design depends on your application:

• Bent Axis Pumps: Feature a cylinder block at an angle to the shaft. They are extremely rugged, handle higher pressures, and are ideal for mobile hydraulics (trucks, tippers).
• Swash Plate Pumps: Feature pistons parallel to the shaft with a tilted plate. They are often used in industrial applications and offer flexible control options like pressure compensation.

The unique characteristics of Hayneks axial pumps make them well-suited for a wide range of industries:

• Mobile Hydraulics: Dump trucks, garbage trucks, snowplows, and hook loaders.
• Construction Machinery: Excavators, wheel loaders, and concrete mixers.
• Material Handling: Mobile cranes, forklifts, and telehandlers.
• Industrial Systems: Hydraulic power units, presses, and manufacturing automation.

When choosing a pump, carefully evaluate:

• Flow Rate (Displacement): Measured in cc/rev (e.g., 60cc, 80cc, 108cc).
• Operating Pressure: Ensure the pump meets your system's bar requirements.
• Rotation Direction: Check your PTO or motor rotation (Left vs. Right).
• Mounting Standard: Confirm if you need ISO (4-bolt) or SAE mounting flanges.

To ensure optimal performance and longevity:

• Fluid Cleanliness: Use high-quality filters to prevent particle contamination (the #1 cause of failure).
• Oil Selection: Use appropriate hydraulic oil (ISO VG 46/68) to prevent overheating.
• Check for Cavitation: Unusual noise often indicates air in the system or a blocked suction line.
• Regular Inspection: Periodically check flanges, hoses, and shaft seals for leaks.