Rexroth A4VSO125 Piston Pump 315 bar 28 cc/rev Variable Displacement

A4VSO125DRG/22R-VPB25N00 A4VSO125DRG/22R-VZB13N00 A4VSO125LR2/22R-PZB13N00
A4VSO40DFR/10L-PPB25N00 A4VSO125DR/22R-PZB13N00 High pressure A4VSO125 piston pump variable displacement German Rexroth

FAQ:

Q1: What is the working principle of the A4VSO pump?

The A4VSO pump operates on the axial piston principle. It converts mechanical rotation into hydraulic flow by utilizing a rotating cylinder block containing pistons. These pistons reciprocate within their bores as they slide against a tilted swash plate (斜盘). This reciprocating motion changes the volume of the sealed chambers, drawing in fluid during the expansion phase and pressurizing and expelling it during the compression phase, thereby achieving suction and discharge.

Q2: What are the main advantages of the A4VSO series pumps?

Key advantages include high rated pressure (up to 350 bar, peak 400 bar), compact structure, high efficiency, convenient flow regulation, excellent suction characteristics, low noise levels, long service life, and a wide range of control options (e.g., pressure, flow, power).

2. Installation & Commissioning

Q3: What are the critical considerations for installing an A4VSO pump?

• Foundation: The base mount or flange mount must be rigid.

• Alignment: Precise alignment between the drive motor shaft and the pump shaft is crucial. The maximum allowable misalignment is < 0.05mm.

• Shaft Loading: Avoid installing pulleys, chains, or gears directly on the pump shaft, as this imposes radial loads which the pump is not designed to handle.

• Reservoir Mounting: If mounted on the reservoir, the pump's centerline should ideally not be more than 500 mm above the oil surface to facilitate good suction conditions and avoid cavitation.

• Filling: Before initial start-up, the pump casing must be filled with hydraulic oil through the designated filling port (e.g., port 'T', 'K1', 'K2', or 'RL' depending on orientation).

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