A4FO-16 A4FO-28 Fixed Rexroth Axial Piston Pump
Rexroth Original Plunger Pump Quality A4FO-16 A4FO-28 Axial piston fixed pump
Product Description
In axial piston fixed pumps, a swash plate or a swash shaft mechanism is usually used. When the drive shaft rotates, it causes the piston to reciprocate axially. For example, in a swash plate type axial piston fixed pump, the piston is connected to a swash plate. When the drive shaft rotates, the piston moves back and forth along the cylinder bore due to the tilt of the swash plate. This reciprocating motion of the piston draws in liquid through the oil inlet and then forces the liquid out through the oil outlet, forming a continuous flow of hydraulic oil and generating pressure. Axial piston fixed pump is a type of hydraulic pump. It plays an important role in hydraulic system by converting mechanical energy into hydraulic energy. The working principle of this pump is the axial movement of the piston. The piston moves parallel to the axis of the pump, and this movement is used to displace the fluid and generate hydraulic pressure.
Piston pump advantage
High-pressure capability: Axial piston stationary pumps are capable of producing very high hydraulic pressures. This makes them suitable for applications that require high forces, such as heavy hydraulic presses or hydraulic systems for construction machinery. For example, in a hydraulic press used for metal forming, the high-pressure output of an axial piston stationary pump allows the hydraulic press to apply high forces to a metal workpiece.
Variable displacement: As mentioned earlier, the displacement of the pump can be varied by adjusting the angle of the swash plate or the inclination of the shaft. This variable displacement capability allows for precise control of the flow of hydraulic fluid. In applications such as variable speed hydraulic motors or servo-controlled hydraulic systems, this ability to adjust the displacement is critical for precise control of the speed and force of the system.
High efficiency: Such pumps typically have high volumetric and mechanical efficiencies. High volumetric efficiency means that most of the fluid drawn by the pump is actually delivered to the hydraulic system, minimizing internal leakage. High mechanical efficiency means that a large portion of the input mechanical energy is converted into useful hydraulic energy, reducing energy losses due to friction and other factors.
Technical Parameters:
| Size | NG | 22 | 28 | 71 | 125 | 180 | 250/H1) | 500/H1) | ||
| Displacement, geometric, per revolution | Vg | cm3 | 22 | 28 | 71 | 125 | 180 | 250 | 500 | |
| Maximum rotational speed2) | nnom | rpm | 3600 | 3000 | 2200 | 1800 | 1800 | 1500 /1900 | 1320 | |
| /1500 | ||||||||||
| Maximum rotational speed3) | nmax | rpm | 4500 | 3750 | 2700 | 2200 | 2100 | 1800/2100 | 1600/1800 | |
| Flow | at Vg and n nom | qv | I/min | 79 | 84 | 156 | 225 | 324 | 375 /475 | 660 /750 |
| Power | at Vg, nnom andAp = 400 bar | P | kW | 53 | 56 | 914) | 1314) | 1894) | 219/2774) | 385 /4384) |
| Torque | at Vg and Ap = 400 bar | T | Nm | 140 | 178 | 3964) | 6964) | 10034) | 13934) | 27854) |
| Rotary stiffnessdrive shaft | Shaft end S | C | kNm/rad | 29,9 | 29,9 | |||||
| Shaft end P | C | kNm/rad | _ | - | 146 | 260 | 328 | 527 | 1145 | |
| Shaft end Z | C | kNm/rad | 146 | 263 | 332 | 543 | 1136 | |||
| Moment of inertia for rotary group | JGR | kgm2 | 0,0017 | 0,0017 | 0,0121 | 0,0300 | 0,055 | 0,0959 | 0,3325 | |
| Maximum angular acceleration | a | rad/s2 | 38000 | 38000 | 20000 | 13000 | 10000 | 8000 | 4800 | |
| Case volume | V | 1 | 0,3 | 0,3 | 2,0 | 3,0 | 4,0 | 7,0 | 11,0 | |
| Weight (approx.) | m | kg | 13,5 | 13,5 | 34 | 61 | 76 | 120 | 220 | |
Application areas
Engineering machinery: In excavators, loaders, cranes and other equipment, axial piston fixed motors are used to drive the movement of walking devices and working devices (such as dipper arms and booms of excavators). Their high torque and adjustable speed characteristics can meet the working requirements of engineering machinery under different working conditions.
Marine equipment: In the steering system and anchor windlass system of ships, axial piston fixed motors can provide reliable power to ensure the normal operation of ship maneuvers and mooring equipment. It can also maintain good performance in harsh marine environments and adapt to the long-term stable operation of ships.
Industrial automation equipment: In some automated production lines, machine tools and other equipment that require precise control of movement, axial piston fixed motors can be used as power sources. Through advanced hydraulic control systems, high-precision position control and speed control can be achieved to improve product processing quality and production efficiency.
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