DFR Control Valve A10VSO Seriesis a high-performance axial piston variable pump control valve produced by Rexroth, widely used in industrial and construction machinery fields. Below is a comprehensive introduction to this series of control valves:
I. Technical Features
1. Structural Design:
• Adopts axial piston variable pump design with fixed displacement, suitable for hydrostatic transmission in open or closed systems.
• The cylinder block and oil distribution plate adopt spherical oil distribution, which can automatically align during operation, resulting in low circumferential speed and high efficiency.
• The drive shaft can withstand radial loads, with low noise, compact structure, and high power-to-weight ratio.
2. Flexible Control Modes:
• Offers multiple control modes, including manual control, electronic proportional control, and hydraulic proportional control, to meet the needs of different scenarios.
3. Comprehensive Protection Functions:
• Equipped with overload protection, hydraulic motor start-stop protection, and other functions to ensure safe operation of the equipment.
II. Working Principle
• Stepless Variable Displacement: Achieves stepless variation of flow by adjusting the swashplate angle, with the flow proportional to the drive speed and displacement.
• DFR Composite Control:
• DR (Constant Pressure Control): Adjusts the variable displacement cylinder through the pressure control valve to ensure a basically constant outlet pressure. When the system pressure reaches the set value, the pump enters a constant pressure condition, automatically adjusting the displacement to meet the load demand.
• FR (Flow Control): Adjusts the variable displacement cylinder through the flow control valve to maintain a constant pressure difference across the throttle valve, ensuring that the flow through the throttle valve remains at the set value regardless of the load.
III. Performance Parameters
• Nominal Pressure: 280 bar
• Maximum Pressure: 350 bar
• Applicable Medium: Hydraulic oil
• Applicable Temperature: 30-90℃
• Nominal Pressure: 32 MPa
• Material: Cast iron
• Installation Form: Flange
• Features: Low noise, low pressure pulsation, high efficiency, high cavitation resistance
IV. Application Scenarios
• Industrial Fields: Suitable for various industrial equipment requiring stable pressure and flow, such as machine tools, plastic machinery, and metallurgical equipment.
• Construction Machinery: Widely used in hydraulic systems of construction machinery such as excavators, loaders, cranes, and concrete pump trucks, becoming a preferred product in these fields due to its high performance and reliability.
V. Advantages
1. High Efficiency and Energy Saving:
• Adopts advanced hydraulic technology to reduce energy loss and improve system efficiency.
2. Stable and Reliable:
• Compact structure, stable operation, long life, and low failure rate.
3. Strong Adaptability:
• Flexible control modes, adjustable according to different working conditions, and strong adaptability.
4. Easy Maintenance:
• Reasonable design, easy maintenance, and low operating costs.
VI. Typical Model Examples
• A10VSO140DFR1/31R-PPB12N00:
• Large displacement range, suitable for high speed and high torque requirements.
• Excellent suction characteristics and low noise design.
• A10VSO71DFR1/32R-VPB22U99:
• Compact structural design, suitable for applications with limited space.
• High efficiency and energy saving, with high drive shaft bearing capacity.
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The "DFR Control Valve A10VSO Series" plays an important role in industrial and construction machinery fields with its advanced technology, stable performance, and wide range of applications.
