ARL1 Series Variable Displacement Piston Pump
High Efficiency: Pressure compensation control ensures high volumetric efficiency with zero overflow loss, minimizing power consumption.
Ultra-Compact Design: Engineered for compact workstations with an ultra-small footprint.
Lightweight Optimization: Weight optimized to 6.8kg for enhanced portability.
Low Noise Operation: Operates at 55dB(A) or lower under 7MPa pressure, meeting industrial noise reduction standards.
ARL1 Series Variable Displacement Piston Pump: Detailed Overview
Product Overview
• Brand & Series Positioning: Part of Yuken Corporation's (Japan) advanced variable displacement piston pump portfolio, evolved from the A/AR series with enhanced compactness, low noise, and efficiency. Targets small-displacement hydraulic systems (4-16.3 cm³/rev displacement range).
• Core Features:
• Variable Functionality: Stepless displacement adjustment via swashplate angle modulation, supporting constant pressure, constant power-pressure, and constant pressure-flow control modes with rapid response.
• Pressure Performance: Continuous operating pressure up to 280 bar, peak transient pressure 350 bar; drive shaft accommodates axial/radial loads.
• Structural Advantages: SAE/ISO standard mounting flange compatibility for multi-circuit systems; optimized port plate design for superior suction performance; piping requires equal-diameter hoses with suction line elevation ≤1m below pump body to prevent air entrainment.
Technical Specifications
• Displacement Range: Models include ARL1-6, ARL1-8, ARL1-12, ARL1-16 with graded displacement options for diverse operational demands.
• Installation & Maintenance:
• Mounting: Pump port upward orientation; flexible coupling recommended to minimize stress (max allowable deviation ≤0.1mm TIR, angular deviation ≤0.2°).
• Housing: Maintain casing pressure <0.1MPa via drain line; shock pressure <0.5MPa; piping length <1m with submerged ends.
• Torque Requirements: Fastening torque 55-75Nm; avoid bending/thrust torque on fittings.
• Environmental Adaptability: Suction pressure range -16.7 to +50kPa; oil temperature controlled within optimal range to prevent performance degradation.
Operating Principle
• Axial Piston Design: Pistons reciprocate via slipper-swashplate contact; as drive shaft rotates the cylinder block, variable swashplate tilt modulates piston stroke for suction/discharge cycles. Port plate separates intake/discharge chambers, ensuring unidirectional flow via check valves.
• Displacement Control: Swashplate angle adjustment alters displacement volume; integrated pressure compensators enable constant pressure/power output adaptation to load fluctuations.
Applications
• Industrial Use: Widespread in construction machinery (excavators, concrete pumps), agricultural equipment, injection molding machines, steel rolling mills, oilfield equipment, and environmental systems (e.g., wastewater treatment).
• Precision Applications: Suitable for CNC machine tools, hydraulic test benches, and low-noise/high-reliability auxiliary systems in medical/aviation sectors.
