Submersible pump as submerged fluid transport equipment, its core features are fully enclosed waterproof structure, liquid-cooled motor design and flow components corrosion resistant materials. How often it needs to be maintained depends on the physical characteristics of the continuous contact with the medium during operation.
Fine particles form stratification effect on the surface of submersible pump impeller, and high viscosity substances aggravate adhesion strength. Soluble minerals are affected by temperature and pressure changes and precipitate crystals on mechanical seal surfaces. The metabolites of bacteria and algae in bio-active medium are easy to form colloidal biofilm in the overflow chamber.
The accumulation of micron abrasive particles on the rotating surface changes the specific pressure of the end surface, and leakage will occur when the lubricating film cannot be formed completely. Bearing pre-load decreases gradually with wear particle intrusion, and intervention is needed before vibration amplitude reaches critical point of material resonance. The dynamic balance of impeller is destroyed by uneven adhesion, which causes the radial alternating stress of shafting to surge sharply.
Monitor the progressive upward trend of the operating current. When the current value continuously exceeds the initial operating baseline by a certain proportion, it indicates that the deposition on the surface of the overcurrent component has caused a significant decrease in hydraulic efficiency. At this time, cleaning can avoid entering the wear acceleration inflection point, restore efficiency and block the deep damage chain.
