What is the characteristic curve of slurry pump? How many aspects are included? What is the role?
A: Usually the curve indicating the relationship between the main performance parameters is called centrifugal pump performance curve or characteristic curve, in essence, the centrifugal pump performance curve is the external expression of the law of motion of the liquid in the pump, obtained through actual measurement. Characteristic curves include: flow - head curve (Q-H), flow - efficiency curve (Q-η), flow - power curve (Q-N), flow - cavitation margin curve (Q - (NPSH) r), the role of the performance curve is any flow point of the pump, can be found in the curve of a set of its relative head, power, efficiency and cavitation margin value, this set of parameters known as the working state, referred to as the working condition or working condition point, centrifugal pump higher efficiency point of the working condition is called better working condition point, better working condition point is generally the design working condition point. The rated parameters of general centrifugal pump that the design condition point and the better condition point coincide or very close. In the practice of the selected efficiency interval operation, that is, energy saving, but also to ensure that the pump works properly, so it is important to understand the performance parameters of the pump.