A2FO32/61R-VSD55 A2FO Series Bent-axis Fixed Axial Piston Pump

Hengmeisi devotes itself to the research, precision manufacturing and bulk supply of high-pressure open-circuit axial piston pumps, with the durable A2FO32/61R-VSD55 A2FO Series Bent-axis Fixed Axial Piston Pump standing out as a staple fixed-displacement model for mobile and stationary industrial hydraulic systems. Upgraded with 61-series bent-axis tapered piston technology, this hydraulic pump is uniquely optimized for open-loop hydrostatic transmission, delivering steady fluid output, superior pressure resistance and an outstanding power-to-weight ratio. Unlike conventional hydraulic pumps that struggle with low efficiency and poor adaptability to harsh working conditions, this A2FO model maintains stable high-efficiency operation under prolonged variable-load and high-pressure scenarios, featuring robust structural durability and extremely low failure probability.

This A2FO32/61R-VSD55 piston pump effectively resolves common operational defects of traditional gear pumps and ordinary piston pumps, including insufficient pressure bearing capacity, gradual flow attenuation and premature aging under sustained heavy-load operation. Equipped with an integrated tapered piston sealing structure and upgraded spherical flow distribution system, it minimizes internal hydraulic leakage and power wastage. Every finished pump undergoes strict standardized factory tests, including long-term full-load aging cycling, ultra-high pressure impact testing and sealing durability verification. With full dimensional consistency and functional interchangeability with original Rexroth A2FO products, it enables direct replacement without any equipment modification, effectively cutting down industrial operational costs and production downtime.

Core Product Performance Advantages

1. Professional Open-circuit System Adaptation

Tailored exclusively for open-loop hydraulic transmission systems, the A2FO32/61R-VSD55 A2FO Series Bent-axis Fixed Axial Piston Pump bent-axis piston pump perfectly matches the operational characteristics of mainstream mobile and stationary hydraulic machinery. Its fixed displacement design enables output flow to change synchronously with driving speed, ensuring precise and consistent hydraulic power supply. Unlike dual-circuit dedicated pumps that exhibit poor adaptability to open-loop systems, this A2FO pump optimizes internal flow channel layout for single-loop oil intake and discharge, significantly reducing flow pulsation and pressure fluctuation. It stabilizes the overall power output of open-circuit hydraulic systems and improves the operational accuracy of matched industrial equipment.

2. Ultra-high Pressure Resistance & High Power Density

Built with a reinforced 61-series pressure-resistant framework, the A2FO32/61R-VSD55 supports a rated working pressure of 400bar and can withstand transient peak pressure up to 450bar, fully satisfying the extreme working requirements of heavy industrial and mobile machinery. The compact bent-axis transmission design achieves high power density within a miniaturized structure, and its optimized power-to-weight ratio effectively reduces the overall volume and installation space of the entire hydraulic system. The one-piece tapered piston structure enhances overall structural rigidity, ensures even internal force distribution, and prevents structural deformation caused by long-term high-pressure hydraulic impact.

3. High Volumetric Efficiency & Energy-saving Operation

Featuring precisely fitted internal components and self-compensating sealing structures, the A2FO32/61R-VSD55 greatly reduces internal hydraulic leakage and mechanical friction loss. Its volumetric efficiency remains above 94% during long-duration continuous operation, far surpassing the performance of ordinary hydraulic pumps of equivalent specifications. No obvious efficiency decline or pressure drop occurs even after thousands of hours of full-load cyclic operation. This excellent high-efficiency characteristic lowers invalid energy consumption of hydraulic systems, realizing energy-saving, low-loss and highly stable operation for all types of industrial hydraulic equipment.

4. Excellent Durability & Full Interchangeability

Key internal components including tapered pistons, alloy cylinder blocks and spherical oil distribution plates are forged from high-strength wear-resistant alloy materials, processed through vacuum heat treatment and ultra-precision grinding craftsmanship. Matched with composite sealing accessories resistant to high temperature and ultra-high pressure, the pump adapts flawlessly to harsh working environments with high temperature, heavy dust and continuous cyclic operation. Additionally, it fully replicates the installation dimensions, shaft specifications and oil port layout of original Rexroth A2FO pumps, achieving complete interchangeability. Users can replace old or damaged units directly without modifying pipelines or equipment structures, greatly reducing subsequent maintenance difficulty and operational costs.

Professional Model Code Interpretation

The coding rules of the A2FO32/61R-VSD55 comply with Rexroth’s global unified technical specifications for A2FO series axial piston pumps. Each code segment corresponds to specific product attributes, including product category, displacement grade, structural iteration version, rotation direction and sealing configuration, helping global customers quickly confirm equipment compatibility and practical application suitability:

Internal Structure & Working Principle

The A2FO32/61R-VSD55 high-pressure axial piston pump adopts a mature, reliable bent-axis fixed-displacement structure optimized exclusively for open-circuit hydraulic systems. Its core composition includes integrated tapered piston assemblies, high-rigidity alloy cylinder blocks, spherical self-aligning oil distribution plates, bent-axis transmission mechanisms, compact integral housing and multi-layer composite high-pressure sealing systems. Boasting a compact structure, high mechanical strength and superior operational stability, this pump is fully adaptable to long-cycle continuous work and extreme high-pressure industrial conditions:

1. Integrated Tapered Piston Assembly: Different from traditional split piston structures, this pump adopts one-piece tapered pistons with built-in sealing rings for enhanced structural rigidity. The optimized design effectively prevents structural deformation and hydraulic oil leakage under high-pressure operating conditions. Multiple piston sets are evenly arranged circumferentially to deliver continuous, stable oil suction and pressure discharge circulation.

2. Spherical Self-aligning Oil Distribution System: The built-in high-precision spherical oil distribution plate achieves automatic alignment with the cylinder block during high-speed operation, maintaining uniform and stable matching gaps between internal components. This innovative structure avoids eccentric wear and local pressure loss, ensures smooth hydraulic fluid circulation, and sustains stable volumetric efficiency throughout the pump’s service life.

3. Optimized Bent-axis Transmission Mechanism: The exclusive bent-axis transmission design evens out internal force distribution, reliably bearing high-pressure hydraulic impact and mechanical load. It eliminates local stress concentration issues, maintains stable power conversion efficiency during prolonged operation, and significantly improves the overall anti-fatigue performance of hydraulic equipment.

4. Multi-layer High-pressure Sealing Protection: Utilizing imported composite sealing materials with excellent resistance to oil corrosion, high temperature and high pressure, the pump is equipped with multi-directional anti-leakage structures at the shaft end, flange joints and oil ports. It effectively blocks internal hydraulic oil leakage and prevents external dust and moisture from invading internal precision components, extending the overall service life of the pump.

Complete Technical Parameter Table

Industrial Application Scope

With professional open-circuit system compatibility, outstanding ultra-high pressure resistance, high energy conversion efficiency and full interchangeability with original parts, the A2FO32/61R-VSD55 axial piston pump is widely deployed in diverse mobile machinery and stationary industrial hydraulic equipment that requires stable and reliable high-pressure hydraulic power supply:

1. Mobile Engineering Machinery: Ideal for road construction equipment, medium and small lifting cranes, sanitation vehicles and agricultural machinery, providing steady high-pressure power support for open-loop hydraulic drive systems of various mobile devices.

2. Industrial Hydraulic Station System: Serving as the core power component for open-circuit hydraulic power units, it is widely matched with automated production lines, hydraulic test benches and other general industrial hydraulic supporting systems.

3. Mining & Drilling Auxiliary Equipment: Compatible with small-scale mining machinery and drilling auxiliary hydraulic systems, it delivers stable operation in harsh environments featuring high pressure, heavy dust and long-duration continuous cycling.

4. Metallurgical & Forging Equipment: Suitable for medium and small metallurgical processing machinery and forging auxiliary hydraulic devices, maintaining high-efficiency and stable operation under long-cycle heavy-load industrial conditions.

5. Special Industrial Hydraulic Devices: Widely applied in marine auxiliary hydraulic systems, packaging machinery and precision processing equipment, catering to various high-stability power supply demands of industrial open-circuit hydraulic systems.