A10V-DR Constant Pressure Pump
4 month ago
Product details
The A10V-DR constant pressure pump is a swashplate axial piston variable displacement pump within the Rexroth A10V series, featuring constant pressure control. It can automatically adjust its displacement based on system pressure to maintain a nearly constant outlet pressure. Below is a detailed introduction to the A10V-DR constant pressure pump:
I. Technical Features
1. Constant Pressure Control: The A10V-DR pump achieves constant pressure control through a valve-controlled variable cylinder. When the system pressure does not reach the set constant pressure, the pump delivers its maximum flow rate, functioning similarly to a fixed displacement pump. When the system pressure reaches the set constant pressure, the pump enters a constant pressure operating mode, automatically adjusting its displacement to maintain pressure stability.
2. Swashplate Axial Piston Design: The pump adopts a swashplate axial piston design, offering advantages such as compact structure, high efficiency, and long service life. The pistons are arranged obliquely around the main shaft, allowing for stepless displacement adjustment by regulating the swashplate's tilt angle.
3. High-Pressure Performance: The A10V-DR pump has a rated pressure of up to 280 bar and a peak pressure of up to 350 bar, making it suitable for high-load scenarios.
4. Energy Efficiency: Compared to fixed displacement pumps, the A10V-DR pump significantly reduces energy consumption under constant pressure control, improving energy utilization.
5. Durable Design: The swashplate bearings utilize hydrostatic unloading technology, paired with high-quality seals, ensuring long-term operation of the pump.
6. Low Noise: Optimized oil suction structure and casing oil drainage design reduce the pump's operating noise.
II. Application Scenarios
The A10V-DR constant pressure pump is widely applied in various industrial fields requiring constant pressure control, such as:
1. Construction Machinery: Pilot systems or auxiliary hydraulic circuits in cranes, excavators, and other equipment.
2. Industrial Hydraulic Systems: Constant pressure control scenarios in injection molding machines, machine tool hydraulic stations, and presses.
3. Energy Equipment: Medium- to high-pressure oil supply requirements in wind turbine pitch systems and cooling systems.
III. Technical Parameters (Example)
Taking the A10VSO45DR/31R-PPA12N00 model as an example:
• Nominal Displacement: 45 ml/rev
• Rated Pressure: 28 MPa
• Peak Pressure: 35 MPa
• Rated Speed: 2600 rpm
• Recommended Speed Range: 1000-1800 rpm (continuous operation), with a maximum speed of 2500 rpm (short-term)
• Operating Medium: Hydraulic oil
• Applicable Oil Viscosity Range: 10-1000 mm²/s, with ISO VG 46 or VG 68 hydraulic oil recommended
IV. Operating Principle
The operating principle of the A10V-DR pump is based on a constant pressure control mechanism. When the system pressure does not reach the set constant pressure, the pump delivers its maximum flow rate to meet system demands. When the system pressure reaches the set constant pressure, the spring of the pressure valve is compressed, the valve core moves, and the pump's active variable cylinder pushes the swashplate to reduce its angle, thereby decreasing the output flow rate until it matches the load flow rate. This process restores the system pressure to the set value, achieving automatic flow adjustment and stable pressure control.
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