Shaoyang Victor Hydraulic Co., Ltd.
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A4VG71 Variable Axial Piston Pump 3300 RPM Cast Iron Mobile Crane Applications
Features:
1. Smooth transition of flow direction when the swashplate passes through the neutral position.
2. Equipped with a wide range of highly adaptable control devices for diverse operational regulation.
3. Dual high-pressure relief valves on the high-pressure side to effectively protect the hydraulic transmission from overload.
4. High-pressure relief valves also serve as boost valves, enhancing transient system responsiveness.
5. Integrated boost pump functions both as a feed pump and as a source for control pressure.
6. Built-in low-pressure relief valve limits the maximum boost pressure to ensure system safety.
7. Standard integrated pressure cut-off feature provides automatic system protection.
8. Swashplate-type axial piston variable pump design.
9. Application in closed-circuit hydrostatic drive.
10. Flow proportional to drive speed and displacement.
Technical data:
| Size | NG | 56 | 71 | 90 | 125 | 180 | ||
| Geometric displacement, per revolution | variable pump | Vg max | cm3 | 56 | 71 | 90 | 125 | 180 |
| boost pump (at Δp = 20 bar) | Vg Sp | cm3 | 11.6 | 19.6 | 19.6 | 28.3 | 39.8 | |
| Rotational speed | maximum at Vg max | nnom | rpm | 3600 | 3300 | 3050 | 2850 | 2500 |
| limited maximum | nmax1 | rpm | 3900 | 3600 | 3300 | 3250 | 2900 | |
| intermittent maximum | nmax2 | rpm | 4500 | 4100 | 3800 | 3450 | 3000 | |
| minimum | nmin | rpm | 500 | 500 | 500 | 500 | 500 | |
| Flow | at nnom and Vg max | qv | l/min | 202 | 234 | 275 | 356 | 450 |
| Power at nnom, Vg max | Δp = 400 bar | P | kW | 134 | 156 | 183 | 238 | 300 |
| Torque with Vg max | Δp = 400 bar | M | Nm | 357 | 452 | 573 | 796 | 1146 |
| Δp = 100 bar | M | Nm | 89 | 113 | 143 | 199 | 286 | |
| Rotary stiffness of drive shaft | S | c | kNm/rad | 80.8 | 98.8 | 158.1 | 218.3 | 244.5 |
| T | c | kNm/rad | 95 | 120.9 | – | 252.1 | 318.4 | |
| A | c | kNm/rad | 95.8 | 142.4 | 176.8 | 256.5 | – | |
| Z | c | kNm/rad | 78.8 | 122.8 | 137 | 223.7 | 319.6 | |
| U | c | kNm/rad | – | – | 107.6 | – | – | |
| Moment of inertia of the rotary group | JTW | kgm2 | 0.0066 | 0.0097 | 0.0149 | 0.0232 | 0.0444 | |
| Maximum angular acceleration | α | rad/s² | 24000 | 21000 | 18000 | 14000 | 11000 | |
| Case volume | V | l | 1.5 | 1.3 | 1.5 | 2.1 | 3.1 | |
| Weight (without through drive) approx. | m | kg | 38 | 50 | 60 | 80 | 101 | |
Specifications:
| Warranty | 1 Year |
| Model | A4VG series |
| Place of Origin | China |
| Type | Harvesting machinery piston pump |
| Color | Available any color |
| Type | Hydraulic pump Rexroth |
| Application | Mining equipment |
| Feature | High Efficiency,Long Life |
| Delivery Time | 15-30 Days after Payment |
| Condition | Brand new |
Applications:
Competitive Advantage:
1. Combining exceptional dynamic response with high-pressure protection features, the A4VG series maintains smooth fluid direction changes and continuous flow regulation under varying loads, ensuring optimal system safety and performance in both industrial and mobile environments as a reliable piston pump designed to meet the stringent operational demands and efficiency criteria.
2. Leveraging its compact and modular design, the A4VG series simplifies system integration and installation in confined spaces, while offering exceptional fluid control and energy efficiency as a versatile axial piston pump, ensuring rapid deployment, minimal downtime, and high operational reliability in diverse industrial and mobile hydraulic applications every single day.
3. Designed to operate reliably under extreme temperatures and load fluctuations, the A4VG series features advanced thermal management and precise pressure regulation, ensuring optimal performance and energy efficiency as a dependable hydraulic pump, making it an ideal solution for applications in harsh industrial environments and mobile systems requiring high-quality fluid power.
4. Featuring robust construction and high-strength materials, the A4VG series delivers excellent durability and resistance to wear and tear, ensuring reliable performance and reduced maintenance requirements, making it a cost-effective and high-efficiency hydraulic pump for continuous use in demanding industrial, mobile, and automated applications worldwide, delivering outstanding performance every single day.
The Analysis For Rexroth A4VG Closed Circuit Piston Pump Common Breakdown :
1. In this hydraulic pump, excessive pressure drop across internal flow channels can occur due to blockage, wear, or design inefficiencies, leading to reduced fluid power, diminished overall performance, and increased energy consumption, which necessitates thorough inspection, channel cleaning, and potential design modifications to restore optimal pressure distribution and efficiency immediately.
2. In this piston pump system, improper integration with the external hydraulic network can result in mismatched pressure levels, erratic fluid flow, and communication errors between system components, causing overall performance degradation, increased wear, and potential system shutdown, thereby requiring comprehensive system compatibility checks and integration adjustments for full restoration immediately.
3. In this axial piston pump, exposure to excessive ambient temperatures combined with heavy load conditions can lead to overheating, accelerated fluid degradation, increased component wear, and eventual system failure, which necessitates enhanced cooling measures, load management, and environmental controls to maintain safe and reliable operation under strenuous conditions for longevity.