How to Maintain River Desilting Pumping Dredger for Port Dredging?

River desilting pumping dredger for port dredging is an underwater operation platform with integrated mud suction and pressure delivery functions. The core of its maintenance is to control the wear of flow-through components and the failure of dynamic seals. Scientific maintenance requires the establishment of a preventive maintenance system for the characteristics of equipment with highly abrasive media.

So how to maintain it?

The leading edge of the river desilting pumping dredger for port dredging impeller is inlaid with a carbide anti-wear belt, and the thickness attenuation of the airfoil profile needs to be measured regularly. The inner wall of the pump casing is welded with a mesh wear-resistant layer, and the integrity of the honeycomb anti-wear structure is checked after each operation. The isolation fluid system of the double-end mechanical seal needs to maintain a constant pressure to block fine sand from invading the precision friction pair.

Wear monitoring method. The vibration sensor monitors the trend of bearing clearance changes, and the acoustic emission technology captures the initial signal of impeller cavitation. When the mud concentration changes suddenly, the shaft seal inspection cycle needs to be shortened to prevent leakage caused by eccentric wear of the sealing ring.

Pipeline anti-silt measures. Before stopping the pump, perform the clean water circulation procedure to discharge the sedimentation solid particles. Install low-frequency vibrators at the bends to prevent the adhesion of hardened silt. Inject special grease into the floating pipe connection ball joint every week to compensate for the loss of seawater scouring.

Electrical protection level. The high-voltage cable reel slip ring chamber is filled with dry air, and the humidity monitoring is linked to the dehumidifier unit. The pressure of the underwater motor cavity is maintained in a slightly positive state, and the insulation resistance value should be tested in a cold and dry environment.