Rexroth A10VSO Series Axial Piston Variable Pump: Specifications and Applications

1. Product Overview

2. Core Specifications

2.1 Series Classification & Displacement Range

• Series 31: All-purpose medium-pressure pumps with displacement sizes from 18 cm³ to 140 cm³ (e.g., A10VSO 18, 45, 71, 100, 140). Typical models include A10VSO 71 DG/31R, A10VSO 140 DFLR/31R.
• Series 32: Industrial-grade pumps optimized for heavy-duty applications, with displacement sizes ranging from 45 cm³ to 180 cm³ (e.g., A10VSO 71 DR/32R, A10VSO 180 DRF/32R).

2.2 Key Performance Parameters

2.3 Structural & Installation Specifications

• Sealing Material: FKM (Viton) as standard, ensuring compatibility with most hydraulic fluids.
• Mounting Configuration: ISO 3019-2 (metric) mounting flange with 2-hole design; supports below-reservoir, inside-reservoir, and above-reservoir installation.
• Shaft End: ISO standard shaft key for reliable power transmission; optional through-drive for combination pump setups (A10VSO + A10VSO).
• Port Design: Two drain ports; pump outlet equipped with a port for pressure transducers; B/S flanged metric working ports.

2.4 Control Methods

• Pressure Control (DR): Direct pressure regulation with adjustable setpoints (20-250 bar via setting screw).
• Pressure-Flow Control (DRF/DRS): DRF for open-loop X-T control, DRS for closed-loop X-T control, integrating both pressure and flow regulation.
• Remote Pressure Control (DRG): Hydraulically controlled remote pressure adjustment for flexible system integration.
• Electronic Displacement Control (DFE): Electrically proportional displacement control with pressure feedback, enabling automated system adjustment.
• Power Control (LA5D/LA6D/LA7D): Combines pressure control with power limiting, with adjustable control start points (50-160 bar).

3. Applications

3.1 Industrial Machinery

• Machine Tools: Used in CNC machining centers, lathes, and milling machines for precise feed drive and spindle control, benefiting from low noise and stable flow output.
• Plastic Processing: Applied in injection molding machines and extruders to drive clamping units and screw mechanisms, with pressure-flow control ensuring consistent molding quality.
• Metallurgy & Forging: Suitable for hydraulic presses, rolling mills, and smelting equipment, enduring high-pressure and heavy-load conditions with long service life.

3.2 Construction & Mining Machinery

• Mining Equipment: Integrated into excavators, loaders, and drill rigs, providing powerful hydraulic drive for digging, lifting, and drilling operations.
• Crane Systems: Used in mobile and stationary cranes to control hoisting, luffing, and slewing mechanisms, with precise pressure control ensuring operational safety.

3.3 Other Fields

• Agricultural Machinery: Adapted for large-scale farm equipment such as combine harvesters and tractors, handling variable loads and harsh outdoor environments.
• Marine & Offshore: Applied in ship deck machinery (winches, cranes) and offshore drilling platforms, with corrosion-resistant options available for marine conditions.
• Energy & Utilities: Used in hydroelectric power plants and wind turbine pitch control systems, delivering reliable performance in continuous operation scenarios.

4. Key Advantages

• Optimized housing and port plate structure minimize noise radiation, meeting industrial noise standards.
• Hydrostatic unloading of cradle bearings reduces wear and extends service life.
• Built-in pressure cut-off valve and dual relief valves on the high-pressure side provide overload protection.
• Excellent power-to-weight ratio and compact design enable easy integration into limited installation spaces.
• Compatible with hydraulic fluids meeting NAS 1638 Class 9 cleanliness requirements, ensuring system reliability.