Rexroth 31 series A10VSO140 High-pressure plunger hydraulic pump

The Rexroth A10VSO140 distinguishes itself through a swashplate-type axial piston pump design. This architecture masterfully balances sophisticated hydraulic control with inherent mechanical robustness, directly enabling its renowned high power density and precise controllability. It transforms rotational input into variable hydraulic power with exceptional efficiency.

The Swashplate Mechanism: Converting Rotation to Reciprocation

At the core of the pump, a cylinder block houses multiple pistons arranged concentrically around the drive shaft. These pistons bear against a tilted swashplate. As the shaft rotates the cylinder block, the fixed angle of this swashplate forces each piston to reciprocate within its bore. This reciprocating motion—drawing in fluid on the intake stroke and expelling it on the pressure stroke—creates the fundamental pumping action. Crucially, in the A10VSO, the swashplate angle is not fixed; it is dynamically adjusted by an integrated hydraulic servo-piston, which modulates the pump's displacement in real-time.

Variable Displacement via Pressure Compensation: The Intelligence of the "SO" Control

The defining characteristic of the "SO" control variant is its pressure-compensated, load-sensing functionality. This is the pump's built-in intelligence. The integrated control logic continuously monitors system pressure. When actuator demand drops, the control mechanism instantly reduces the swashplate angle, decreasing displacement to maintain a preset pressure. It delivers flow-on-demand, providing only the exact volume of oil needed at any moment. This eliminates the massive energy losses and heat buildup inherent to fixed-displacement pumps with throttling valves, making it a cornerstone of energy-efficient hydraulic system design. The target pressure (e.g., 250 bar) is easily adjusted via an external spring setting.

High Efficiency and Power Density: Maximizing Energy Utilization

With its nominal 140 cm³/rev displacement, the A10VSO140 generates substantial flow rates while operating comfortably at continuous pressures up to 280 bar and surviving peaks of 350 bar. Its optimized porting geometry, piston kinematics, and sealing technology minimize internal leakage (high volumetric efficiency) and mechanical friction (high hydro-mechanical efficiency). This ensures a greater percentage of input horsepower from the prime mover—be it a diesel engine or electric motor—is converted into usable hydraulic power, reducing fuel and electricity costs.

Robustness and Long Service Life: Engineered for Demanding Duty Cycles

Designed for unforgiving environments, the pump incorporates a heavy-duty tapered roller bearing to absorb high axial and radial shaft loads from direct-coupled drives. Its internal case drain and pressurized lubrication design ensure critical wear components are constantly lubricated and cooled. When paired with a well-maintained hydraulic system (ISO cleanliness code 18/16/13 or better), this robustness translates to extended service intervals, reduced downtime, and a longer operational lifespan, maximizing return on investment.

Control Flexibility: A Platform Approach to System Design

While the pressure-compensated (SO) type is highlighted here, the A10VO/10VSO platform is celebrated for its modularity. By changing the control cover, the same pump can be configured for:
• Constant Power (LR): Limits input horsepower.

• Electro-Proportional (DFR): Enables remote electronic control of pressure and flow.

• Load-Sensing (DR): For systems with multiple valves.

This flexibility allows engineers to standardize on a hardware platform while tailoring control to the specific machine function, streamlining inventory and design.

Primary Application Examples: Where the A10VSO140 Excels

This pump is the workhorse of choice for applications requiring dense, reliable hydraulic power that is both powerful and intelligent.

• Mobile Machinery (Construction, Agriculture): In excavators, telescopic handlers, and forestry equipment, its pressure compensation provides metered, non-jerky cylinder movements for precise control. The pump inherently manages shock loads from digging or impact, protecting the entire hydraulic system.

• Industrial Production Systems: For plastic injection molding machines, die-casting systems, and industrial presses, the A10VSO140 offers exceptional pressure-holding stability for consistent part quality, low noise levels for improved workplace environments, and high efficiency for reduced operating costs in cyclic, high-duty applications.

• Test and Simulation Equipment: Its stable, precisely controllable output pressure and flow make it ideal for hydraulic test benches, material testing systems, and motion simulators, where repeatability and accurate control are paramount.

Operational Considerations & Best Practices: Ensuring Peak Performance and Longevity

Proper handling, installation, and maintenance are critical to achieving the pump's designed performance and service life.

Installation and Commissioning: A Foundation for Reliability

Correct installation is non-negotiable. Precise drive shaft alignment (within the pump's specified angular and parallel tolerances) is essential to prevent premature bearing and shaft seal failure. Prior to initial start-up, the pump case must be filled with clean, recommended hydraulic fluid, and the entire system should be power-flushed to remove contaminants. During commissioning, set the pressure compensator to the minimum pressure required for the system to function, as this optimizes energy savings and reduces thermal stress.

Maintenance and Troubleshooting: Proactive Care for Maximum Uptime

The primary maintenance focus is fluid cleanliness and condition. Implementing a rigorous schedule of oil analysis and filter changes is the most effective predictive maintenance strategy. Common operational issues and their root causes include:

• Low Volumetric Efficiency/High Case Drain Flow: Typically results from wear on the cylinder block/valve plate interface or piston shoe slipping surfaces, almost always accelerated by fluid contamination or oil degradation (loss of lubricity).

• Excessive Noise or Cavitation: Often stems from inlet line restrictions (clogged suction strainer, undersized hose), excessive oil viscosity (cold start), or a leaking shaft seal drawing in air. A worn bearing will also produce a distinct grinding or rumbling sound.

• Failure to Reach or Maintain Compensator Pressure: Usually indicates an issue with the control mechanism: a fatigued or incorrectly set compensator spring, a clogged orifice or damping screw in the control piston, or excessive internal leakage past the servo-piston seals, preventing the swashplate from stroking fully.

For more information on the A10VSO140 hydraulic pump, please visit https://www.baolilaihydraulic.com/.

Specifications

Selection Table

Q1: What does "A10VSO100" stand for?

A1: It's the Bosch Rexroth product designation. "A10" denotes the axial piston pump series, "V" indicates variable displacement, "SO" specifies the swashplate design with pressure control, and "100" is the nominal displacement in cubic centimeters per revolution (cc/rev).

Q2:My A10VSO100 is noisy. What are the likely causes?

A2:Excessive noise often indicates cavitation (check inlet conditions, suction line, and fluid viscosity), aeration (check for air leaks on the suction side), or excessive wear in the rotating group due to contamination. Always check fluid level, cleanliness, and inlet strainer first.

Q3:How to purchase an A10VSO140 hydraulic pump?

A3:You can click on the right sidebar or the contact information in the top bar to contact us to purchase. You can do so via email, form, WeChat, WhatsApp, or other methods.

Q4:What is the price and delivery time of the A10VSO140 hydraulic pump?

A4:The specific price and delivery time will be provided based on the specific model you provide.