Danfoss JRR/JRL Series Hydraulic Pumps
3 month ago
Product details
JR-R-S75C-LS-23-20-NN-N-3-C3N9-A8N-NNN-JJJ-NNN
JR-R-S75C-LS-26-18-NN-N-3-C3AE-AWN-NNN-JJJ-NNN
JR-R-S75C-PC-21-NN-NN-N-3-S1RE-A2N-NNN-JJJ-NNN
JR-R-S75C-LS-21-25-NN-N-3-C3BF-A8N-FFF-JJJ-NNN
JR-R-S75C-RP-17-10-NN-N-3-S1RE-A8N-NNN-JJJ-NNN
JR-R-S75C-LS-21-25-NN-N-3-K4RF-A9N-FFF-JJJ-NNN
JR-R-S75C-LS-18-21-NN-N-3-K4RE-A2N-NNN-JJJ-NNN
JR-R-S75C-LJ-D2-32-NN-N-3-S1A9-A7N-NNN-BBB-NNC
JR-R-S75C-LJ-D2-32-NN-N-3-S1D6-A7N-NNN-BBB-NNC
JR-R-S75C-LJ-22-32-NN-N-3-S1D6-A7N-NNN-BBB-NNC
JR-R-S75C-LG-NN-20-NN-N-N-A3N7-DAN-NNN-BBB-NNC
JR-R-S75C-LS-23-20-NN-N-3-S1BE-A2N-NNN-BBB-NNN
JR-R-S75C-PC-20-NN-NN-N-3-S1VE-A2N-NNN-JJJ-NNN
JR-R-S75C-LS-25-20-NN-N-3-S1AE-A2N-NNN-JJJ-NNN
JR-R-S75C-LS-19-20-NN-N-3-S1AE-A2N-NNN-JJJ-NNN
JR-R-S75C-LB-21-20-NN-N-3-C3NE-A8N-NNN-JJJ-NNN
JR-R-S75C-LS-15-20-NN-N-3-S1BE-A2N-NNN-JJJ-NNN
JR-R-S75C-LS-20-31-NN-N-3-S1BE-A2N-NNN-JJJ-NNN
JR-R-S75C-LS-19-20-NN-N-3-S1AY-A2N-NNN-JJJ-NNN
JR-R-S75C-AG-15-20-NN-N-3-C2NE-A8N-NNN-JJJ-NNN
JR-R-S75C-LS-23-20-NN-N-3-C3BX-A8N-NNN-JJJ-NNN
JR-R-S75C-PC-25-NN-NN-N-3-C3RE-A8N-NNN-JJJ-P00
JR-R-S75C-LS-25-20-NN-N-3-S1N9-A2N-NNN-JJJ-P00
JR-R-S75C-LS-25-20-NN-N-3-S1N9-A9N-NNN-JJJ-P00
JR-R-S75C-LB-21-22-NN-N-3-C2BE-A8N-NNN-JJJ-NNN
I. Product Overview
The Danfoss JRR/JRL series hydraulic pumps are high-performance axial piston pumps specifically designed for high-pressure, high-flow applications requiring precise flow regulation. Utilizing advanced piston-and-cylinder block designs, these pumps achieve oil suction and pressurization by altering the volume of sealed working chambers through reciprocating piston motion. Their core strengths lie in high-pressure efficiency, compact structure, and flexible flow control, making them widely applicable in hydraulic presses, construction machinery, marine systems, and other industries.
II. Key Performance Parameters
1. Rated & Maximum Pressure
• Rated Pressure: Typically exceeds 30 MPa, meeting high-pressure operational demands.
• Maximum Pressure: Some models reach up to 38.5 MPa, adapting to extreme conditions.
2. Displacement Range
• Multiple displacement options available (e.g., 45–75 mL/rev), covering diverse flow requirements.
3. Speed Range
• Operates within 500–3,360 rpm, depending on model and application.
4. Volumetric Efficiency
• High efficiency ensures smooth operation and uniform flow output.
5. Control Modes
• Supports pressure compensation, load-sensing, and electronic control for precise flow adjustment.
III. Technical Advantages
1. High-Pressure Efficiency
• Stable performance under high pressure enables efficient energy conversion and reduced energy consumption.
2. Compact Design
• Integrated Gerotor charge pump reduces component count, saving installation space and lowering system weight.
3. Flexible Flow Regulation
• Multiple control options (e.g., fixed/variable displacement) allow easy adjustment to meet varying flow demands.
4. High Reliability
• Built with internationally leading material and manufacturing standards for long-lasting durability.
5. Eco-Friendly & Energy-Saving
• Optimized circuit design and lower control pressure minimize power consumption and emissions.
6. Strong Contamination Resistance
• Tolerant to hydraulic fluid impurities, extending equipment lifespan.
IV. Applications
1. Hydraulic Presses
• Serves as a core power source, providing stable high-pressure oil for efficient operation.
2. Construction Machinery
• Ideal for excavators, loaders, and road rollers, withstanding harsh conditions and prolonged use.
3. Marine Systems
• Ensures stable navigation and operation in steering gear and deck machinery applications.
4. Other Industries
• Used in metallurgy, power generation, coal mining, and other high-pressure hydraulic systems requiring precise pressure and speed control.
V. Typical Models & Configurations
• Model Examples: JRL045, JRR055, JRL075, etc., covering varying displacements and pressures.
• Configuration Options:
• Available in axial and radial structures (axial pumps offer smooth operation and low noise; radial pumps represent future advancements).
• Customizable features include integrated flush valves and auxiliary mounting pads for simplified system layouts.
VI. Maintenance & Upkeep
1. Fluid Management
• Replace hydraulic oil regularly, maintaining cleanliness (NAS 8+ recommended) to prevent particulate wear.
• Keep oil temperature within 30–60°C to avoid seal degradation.
2. Seal Inspection
• Periodically check shaft seals and casing gaskets; replace worn components promptly to prevent leaks.
3. Noise & Vibration Monitoring
• Abnormal sounds or vibrations may indicate piston/cylinder wear or contamination—investigate immediately.
4. Maintenance Intervals
• Some models offer up to 8,000-hour maintenance cycles, reducing costs.
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