A11VO145LRDS Dual-Piston Pump
4 month ago
Product details
1. Product Overview
Model: A11VO145LRDS/11R-NZD12K83
Brand: Bosch Rexroth (Germany)
Type: Swashplate-type axial piston variable displacement pump (dual-pump configuration)
Application:
• Designed for open-circuit hydraulic systems in mobile machinery, providing high-pressure hydraulic power for operations such as excavation, tunneling, and concrete pumping.
• Supports multiple control modes to meet diverse working conditions.
2. Key Specifications
【表格】
Parameter Details
Displacement 145 mL/r (per pump)
Nominal Pressure 32 MPa (peak pressure up to 350 bar/400 bar in some references)
Speed Range 1,500–1,800 rpm (typical operating conditions)
Control Modes LR (power control), DR (constant pressure control), HD (hydraulic control), EP (electro-proportional control)
Configuration Dual-pump design with through-drive shaft, allows stacking of gear pumps or identical piston pumps
Fluid Mineral-based hydraulic oil (recommended viscosity: 16–36 mm²/s)
Temperature Range Operating temperature: 30–90°C (requires special handling for cold starts, e.g., oil heating)
Weight Approx. 76–90 kg (per pump)
3. Technical Advantages
1. Energy Efficiency
• Variable displacement control (e.g., load-sensing) adjusts flow automatically based on load, reducing energy waste.
• Swashplate design minimizes mechanical losses, improving volumetric efficiency.
2. High Reliability
• Critical components (e.g., cylinder block, port plate) made of high-strength cast iron for wear and corrosion resistance.
• Spherical port plate design enables self-alignment, reducing leakage and extending service life (>20,000 hours).
3. Flexible Control
• Supports multiple control modes for seamless integration with machinery’s electronic control systems.
• Through-drive shaft allows functional expansion (e.g., adding a charge pump).
4. Harsh Environment Adaptability
• High contamination resistance, suitable for dusty environments like mining and metallurgy.
• Low-noise design (<85 dB) reduces operator fatigue.
4. Typical Applications
1. Excavators
• Powers boom, arm, swing, and travel functions, enabling efficient simultaneous operations.
• Example: Matched with Caterpillar 365B, 345B series excavators.
2. Tunnel Boring Machines (TBMs)/Roadheaders
• Drives cutterhead rotation, thrust cylinders, and segment erectors under high-load, variable-load conditions.
• Example: Used in Jiamusi EBZ160 roadheaders and China Railway Equipment Group TBMs.
3. Concrete Boom Pumps
• Controls concrete pumping and multi-degree-of-freedom boom movement with high-precision flow control.
• Example: Sany Heavy Industry, Zoomlion concrete pumps.
4. Other Mobile Machinery
• Mining dump trucks, pavers, rollers, and other equipment requiring high-pressure hydraulic systems.
5. Selection & Maintenance Recommendations
1. Selection Guidelines
• Displacement Matching: Choose single or dual-pump configurations based on system flow requirements.
• Pressure Rating: Ensure rated pressure exceeds system’s maximum operating pressure (20% margin recommended).
• Control Mode: Prioritize modes compatible with machinery’s electronic control system (e.g., EP electro-proportional).
• Mounting Dimensions: Verify flange and shaft dimensions match original equipment.
2. Maintenance Schedule
• Daily Checks: Hydraulic oil cleanliness (NAS 9 or better), oil level, seal leakage.
• Regular Replacements:
• Hydraulic oil: Every 1,000–3,000 hours or 6 months (adjust based on operating conditions).
• Filters: Replace suction and return filters every 500 hours.
• Key Component Lifespan:
• Piston/bore assembly: 10,000–15,000 hours (dependent on oil cleanliness).
• Bearings: >20,000 hours (with proper lubrication).
3. Troubleshooting
• Low Pressure: Check for clogged suction filter, stuck variable mechanism, or incorrect relief valve setting.
• Excessive Noise: Investigate air ingestion, bearing failure, or port plate wear.
• Leakage: Replace seals (e.g., shaft seals, end cover O-rings) and inspect for housing cracks.
7. Summary
The A11VO145LRDS/11R-NZD12K82 is a high-performance dual-piston pump optimized for construction machinery, offering:
• Energy Efficiency: Variable control reduces fuel consumption for prolonged operations.
• Durability: Withstands harsh conditions, minimizing downtime.
• Adaptability: Supports multiple control modes for easy system integration.
Recommended For: Medium-to-large excavators, TBMs, concrete pumps, and other equipment requiring high-pressure, high-flow hydraulic power.
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