I. Product Overview
The A11VO145LRDS/11R-NZD12K83 is a tandem axial piston pump from the Rexroth brand, belonging to the A11VO series. Designed with a swashplate structure, this series of pumps is specifically tailored for open-circuit hydraulic drives. It boasts features such as high pressure, large flow rate, low noise, and long service life, making it widely applicable in fields including construction machinery, metallurgy, forging, shipbuilding, water conservancy, and hydropower.
II. Product Features
1. Swashplate Structure: Utilizes a swashplate-type axial piston design, enabling stepless adjustment of displacement. The flow rate is proportional to the pump's rotational speed and displacement.
2. High-Pressure Performance: The rated operating pressure can reach 32 MPa (some sources mention 350 bar, approximately 35.5 MPa, which may vary depending on the model or configuration), meeting the demands of continuous heavy-duty operation.
3. Excellent Suction Characteristics: The pump body is optimized to ensure good oil suction performance even during high-speed operation, reducing cavitation phenomena.
4. Low Noise: Incorporates advanced noise reduction technology to effectively lower operating noise and improve the working environment.
5. Long Service Life: Key components are manufactured from high-quality materials and undergo precision machining and special treatment, ensuring long-term stable operation under harsh conditions.
6. Modular Design: Supports various control methods (e.g., pressure control, flow control, and power control), allowing users to select and match options based on actual needs for easy integration with various hydraulic systems.
7. Through-Shaft Drive: Supports through-shaft drive, enabling combination with other pumps to form multi-pump systems and meet the needs of complex hydraulic systems.
8. Flange Mounting: Adopts a flange mounting form, facilitating installation according to the actual spatial layout.
III. Technical Parameters
• Model: A11VO145LRDS/11R-NZD12K83
• Displacement: 145 cm³/rev (for the tandem pump, the displacement of each section may be the same or different; refer to the product manual for specifics)
• Rated Pressure: 32 MPa (or 350 bar)
• Maximum Pressure: May vary depending on the model or configuration, but typically higher than the rated pressure
• Speed Range: Refer to the product manual for specific speed ranges, but generally supports high rotational speeds
• Control Method: Supports various control methods, such as pressure control (DP), flow control, and power control
• Mounting Form: Flange mounting
• Pump Weight: Refer to the product manual for specific weight, but tandem pumps are generally heavier
• Operating Temperature: 30-90℃
• Applicable Medium: Hydraulic oil
IV. Application Areas
The A11VO145LRDS/11R-NZD12K83 tandem axial piston pump is widely used in the following fields:
1. Construction Machinery: Such as excavators, loaders, and cranes.
2. Metallurgical Machinery: Hydraulic systems for blast furnaces, converters, continuous casting machines, etc.
3. Forging Machinery: Provides stable and continuous power output for forging equipment.
4. Shipbuilding Machinery: Used in hydraulic systems for ship hoists and steering gears.
5. Water Conservancy and Hydropower: Hydraulic systems for water conservancy and hydropower equipment, such as turbine governors.
6. Other Fields: Such as ceramic presses, refractory presses, and mining machinery.
V. Maintenance and Upkeep
1. Regularly Inspect Hydraulic Oil: Periodically check the cleanliness and oil level of the hydraulic oil, promptly replace contaminated oil, and replenish it to the specified level.
2. Monitor Pump Body Temperature: Avoid operating the pump at excessive temperatures to prevent damage to seals, bearings, and other components.
3. Regularly Replace Seals: Aging or damaged seals can cause leaks, affecting pump performance, so they should be replaced regularly.
4. Check Bearing Clearance: Excessive bearing clearance can affect the pump's internal clearances and the thickness of the hydrostatic support oil film, reducing bearing service life. Therefore, regularly check and replace bearings with excessive clearance.
5. Keep the Pump Body Clean: Regularly clean dust and oil stains from the pump body surface to prevent impurities from entering the pump body and affecting normal operation.
