Shaoyang Victor Hydraulic Co., Ltd.
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Closed-Loop Construction Machinery Piston Pump Cast Iron body 400 Bar Pressure
Features:
1. Axial piston pump with a swashplate mechanism for efficient closed-circuit hydraulic transmission.
2. Variable displacement design ensuring that flow rate is proportional to drive speed and displacement.
3. Infinitely variable flow control by adjusting the swashplate angle.
4. ISmooth transition of flow direction when the swashplate passes through the neutral position.
5. Equipped with a wide range of highly adaptable control devices for diverse operational regulation.
6. Dual high-pressure relief valves on the high-pressure side to effectively protect the hydraulic transmission from overload.
7. High-pressure relief valves also serve as boost valves, enhancing transient system responsiveness.
8. Integrated boost pump functions both as a feed pump and as a source for control pressure.
9. Built-in low-pressure relief valve limits the maximum boost pressure to ensure system safety.
10. Standard integrated pressure cut-off feature provides automatic system protection
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 | SY-A4VG |
| Place of Origin | China |
| Type | Costruction machinery piston pump |
| Color | Available any color |
| HS Code | 8413503190 |
| Application | excavator, road rollers, pavers |
| Feature | High Quality |
| Delivery Time | 15-30 Days after Payment |
| MOQ | 1 Piece |
Applications:
Competitive Advantage:
1. The A4VG series offers unmatched efficiency and reliability in high-pressure closed-circuit hydraulic drives, combining variable displacement design with integrated boost features, dual relief valves, and advanced mechanical sealing to ensure optimal energy utilization, durability, and performance in demanding industrial and mobile applications as a high-quality axial piston pump every day.
2. Engineered for diverse applications, the A4VG pump delivers exceptional control and smooth fluid dynamics by adjusting swashplate angles continuously, providing precise variable flow, seamless directional changes, and outstanding safety features with pressure cut-offs and boost functions that significantly enhance system performance as a robust hydraulic pump in complex operating environments.
3. Featuring variable displacement technology and high dynamic response, the A4VG series ensures consistent hydraulic power output even under rapid load changes, providing reliable energy conversion, minimal energy losses, and long service life while delivering precise control and performance as a dependable piston pump for modern automated and mobile systems remarkably.
4. Optimized for efficiency and reliability, the A4VG series features a compact design with high volumetric efficiency, advanced manufacturing, and corrosion-resistant treatments that extend service life and reduce maintenance, delivering consistent performance under extreme conditions as a high-performance axial piston pump in various industrial and mobile applications for superior overall efficiency.
The Analysis For Rexroth A4VG Closed Circuit Piston Pump Common Breakdown :
1. In this axial piston pump system, the variable displacement mechanism can fail due to wear and control malfunctions, causing inconsistent flow regulation and pressure instability that jeopardizes overall performance, reduces efficiency, and may lead to premature system failure, thereby necessitating timely maintenance and accurate fault diagnosis to ensure reliable operation.
2. In this hydraulic pump system, misalignment of the swashplate or improper adjustment in the control circuitry can result in erratic flow direction changes and compromised efficiency, leading to increased wear, potential overheating, and overall performance degradation, which necessitates precise calibration and regular inspection for sustained reliable operation, ensuring continuous productivity.
3. In this piston pump, failure of the mechanical sealing elements due to wear or improper installation can lead to internal and external fluid leakages, resulting in loss of hydraulic efficiency, contamination, and system failure, thus requiring careful inspection, prompt replacement, and improved installation practices to maintain optimal performance and longevity.