Rexroth Pump Troubleshooting: Guide to Preventing Cavitation

Axial piston pumps represent the standard core of high-pressure industrial systems. Standard operations rely on continuous oil flow to maintain system speed. Yet, transient suction drops can occur under demanding mechanical loads.

Hydraulic cavitation occurs when fluid pressure drops below vapor pressure thresholds. This creates mechanical vapor bubbles inside the low-pressure suction chamber. These localized bubbles subsequently travel to high-pressure regions and implode.

Imploding vapor bubbles generate severe micro-jet impacts exceeding 1,000 bar. This rapid force causes severe physical pitting on piston surfaces. Volumetric efficiency decays while noise levels increase during continuous cycle times.

Cavitation Diagnostic Comparison: Rexroth Pump Mechanics

The comparative table below maps standard cavitation causes, physical symptoms, and engineering solutions:

Primary Rexroth pump troubleshooting requires regular verification of suction pipeline geometry. Suction pipes should remain straight and highly direct. Avoid excess bends to minimize localized pressure drops below nominal limits.

Optimal suction fluid velocity must remain under 1.2 meters per second. Higher flow speeds introduce turbulence and expand localized low-pressure zones. Maintain oil levels in the main reservoir to prevent vortex-induced air entrainment.

For precision sizing guidelines, engineers typically consult the technical specifications of global distributors like Naboer Hydraulic. Analyzing performance limits on certified visual test rigs ensures compatible sizing under stress. Regular testing prevents premature breakdown of piston groupings.