Several Common Factors Affecting The Head Loss Of Centrifugal Oil Pumps

Dec 13, 2024

1. Head refers to the vertical distance from the liquid level to the center of the pump inlet flange, which is the energy difference between the inlet and outlet of the liquid pump per unit mass. Specific example: If it is a regular oil cleaning pump, the pump head is 50 meters. In fact, subtracting the loss along the way and the local loss of the pipeline route from 50 meters is the distance value from the pump suction oil pool liquid level to the head height.
2. Pipeline losses include losses along the route and local losses in the pipeline. The loss along the way is related to the material of the pipe, the size of the pipe diameter, the flow rate and viscosity of the conveying medium; Local losses mainly refer to the losses caused by tapered pipes, bent pipes, and various valves. The algorithms for the two types of losses can refer to relevant fluid mechanics books. In practical calculations, the local loss is relatively small and can be roughly estimated directly.
3. For a typical centrifugal oil pump, as the pump flow rate increases, the head will decrease. This is a characteristic of the pump itself. For pipeline systems, the larger the flow rate being transported, the higher the required head. There is a balance point between the characteristics of the pump itself and the pipeline characteristics (professionally speaking, the intersection point of the pump characteristic curve and the pipeline characteristic curve), which is the operating condition point of the pump. When selecting, the required head is calculated based on the flow rate conveyed by the pipeline, and the appropriate pump type, as well as the pump shaft seal, material, and supporting motor, are selected according to the medium conditions, flow rate, and head.