What decreases the efficiency of the fire pump during operation?
The fire pump is an important part of the fire protection system and has a great responsibility for safety. The operating efficiency of the fire pump directly determines the working efficiency of the fire protection system. Sometimes, we may find that the operating efficiency of the fire pump has dropped. What is the reason? We will analyze several possible reasons for the decline in the efficiency of the fire pump.
- The volume loss and mechanical loss of the fire pump. In the long-term work of the fire pump, mechanical wear causes leakage and resistance increased, which reduces volumetric efficiency and mechanical efficiency.
- The impeller surface of the fire pump is caused by cavitation. When the fire pump is running, the impeller blade will generate negative pressure on the back surface, and it will be prone to cause cavitation problems when it is under negative pressure for a long time.
Fire fighting pump - The processing technology of the fire pump production process. Due to the machining process, the diaphragm pump defects, cavitation, abrasion, corrosion, and chemical etching cause voids or cracks in the flow path of the fire pump, and vortices are generated when the water flows, resulting in energy loss.
- The friction coefficient inside the pump increased. In the long-term work of the fire pump, the water flow continuously forms a flush on the inner wall and the impeller water surface, thereby causing the surface to be rough, increasing the friction coefficient and causing the hydraulic efficiency to decrease.
- The scale or corrosion of the fire pump casing. The fire pump is affected by the added drugs or water quality, causing serious fouling or corrosion inside the pump casing. The inner wall of the pump forms scale, which reduces the volume of the pump body, reduces the pumping volume, and the flow path is rough and the head loss increases.