Sauer DanFoss Piston Pump JRR045
Danfoss JRR045 is a mature, powerful, and reliable 45cc closed-loop axial piston pump, which is the core power component of many heavy-duty hydraulic drive systems. Its success lies in its excellent design, high-performance control options, and robust structure.
Key Features
Closed loop design: The pump itself integrates a make-up pump and system control valve, forming a compact closed loop unit. This eliminates the need for an external oil pump and many valve components, simplifying the system design.
Axial plunger inclined plate design: The plunger is arranged parallel to the transmission shaft, and the displacement can be infinitely adjusted by changing the inclination angle of the inclined plate. Provide smooth and efficient power transmission.
Bidirectional variable: The inclined disc can tilt in two directions beyond the neutral position, thereby changing the direction and flow rate of the output fluid, making it very suitable for applications that require direct drive and four quadrant operation (forward and reverse, electric, and braking).
Integrated control system: Standard or optional multiple high-performance control methods, such as:
HA control: Hydraulic servo control, fast response, used for high demand applications.
EP control: Proportional electromagnetic control, convenient for electrical integration and automation.
HW control: manual servo control.
HD control: hydraulic remote control.
High working pressure: The continuous working pressure can reach 420 bar (some models can reach 450 bar), and the peak pressure can reach 480 bar, representing the high level of industrial piston pumps.
Large displacement: The "045" in the model indicates a nominal displacement of approximately 45 cm ³/rev (45 milliliters per revolution). This is the core displacement specification of the series.
Main technical parameters (typical values)
Displacement: 45 cm ³/rev
Maximum speed: approximately 3000-3600 rpm (depending on specific model and oil port configuration)
Maximum continuous pressure: 420 bar
Peak pressure: 480 bar
Oil pump displacement: typically around 9-11 cm ³/rev (integrated into the pump cover)
Control type: Multiple options available (HA, EP, HW, etc.)
Installation method: flange installation, in accordance with SAE standards.
Shaft extension: Standard spline shaft (such as SAE "C" type).
Main application areas
JRR045, with its high performance and reliability, is widely used in:
Construction machinery: excavators, cranes, concrete pump trucks, rotary drilling rigs, etc.
Marine engineering: servos, winches, propulsion systems.
Industrial equipment: injection molding machines, presses, metallurgical equipment.
Test bench: As a high-performance power source.
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