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:
1. Designed specifically for construction machinery applications,
this state-of-the-art piston pump technology in the A4VG series
offers superior performance and reliability in high-pressure
hydrostatic drives. It delivers consistent fluid power under
varying loads and ensures optimal energy efficiency while operating
in demanding environments. The system’s integrated boost pump and
dual relief valves provide excellent safety features, making it an
ideal solution for heavy-duty construction tasks and long
operational cycles in dynamic worksite conditions. Engineered for
reliability and optimized performance, exceeding expectations.
2. Utilized in demanding construction environments, the A4VG series
axial piston pump delivers exceptional control and power management
for hydrostatic drive systems. It ensures reliable fluid flow and
energy efficiency under fluctuating load conditions while
maintaining smooth operation during intensive tasks. The innovative
design incorporates integrated boost features and precise relief
valve settings to maximize safety and performance. This robust
hydraulic solution is ideal for heavy construction machinery,
reducing maintenance downtime and enhancing overall productivity in
challenging worksite conditions. Absolutely reliable.
3. Optimized for agricultural machinery, the A4VG series hydraulic
pump delivers precise control and consistent energy output for
modern farming equipment. Its variable displacement design adapts
seamlessly to varying operational demands while ensuring minimal
energy loss and high efficiency in irrigation, harvesting, and
tilling processes. The pump’s integrated safety features, including
boost functionality and dual relief valves, guarantee reliable
performance under harsh rural conditions. This innovative solution
enhances productivity and reduces maintenance costs, making it
indispensable for advanced agricultural hydraulic systems.
4. Engineered for modern agricultural applications, the A4VG series
piston pump delivers reliable fluid power for tasks such as crop
harvesting, seeding, and soil preparation. Its variable
displacement mechanism adjusts fluid output to meet diverse
operational requirements while ensuring optimal energy efficiency.
The design integrates robust safety features and boost functions to
handle sudden load changes during field operations. This
high-performance hydraulic solution minimizes downtime and
maintenance needs, promoting sustainable farming practices and
enhancing overall equipment productivity on large-scale farms
efficiently.
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.
