泥沙对水泵运转特性的影响黄河水中含泥沙较多，因而对离心泵特性影响较大，由于水力磨损和机械磨损而造成了流量减少，扬程降低，效率降低，功率增大相应的泵的特性曲线变化也不同。对于6Sh -9A水泵，含沙率不同，所得的流量、扬程、功率也不同。泥沙影响后的性能曲线可以看出，含沙量越大，水泵效率越低，流量越小，扬程也相应减少，功率相应增大。泥沙对水泵的磨损水泵过水部分的破坏可分为腐蚀、汽蚀和磨蚀三种。磨蚀是由于水中含有较硬的固体颗粒与过流部件表面摩擦冲撞而形成的，属于机械破坏，正因为黄河水含泥沙量大，所以对水泵磨损比较严重。一般的说，造成磨损的原因是：高速含沙水流所产生的冲刷磨蚀力。当含有一定粒径、硬度的泥沙，以高速通过水泵时，产生相当大的冲磨力，将金属表面微细颗粒层层磨剥而引起表面破坏。因此，高速是引起水泵磨损的主要原因。高速含沙水流在金属凹凸不平的表面形成旋涡和折曲，沙粒对表面形成反复冲击使壁面破坏。

Impact of Sediment on Pump Operation Characteristics The Yellow River water contains more sediment, which has a greater impact on the characteristics of the centrifugal pump. Due to hydraulic and mechanical wear, the flow rate is reduced, the head is reduced, the efficiency is reduced, and the power of the corresponding pump is increased. The characteristic curve changes are also different. For the 6Sh -9A water pump, the sand content is different, and the resulting flow, head, and power are also different. The performance curve after the influence of sedimentation shows that the greater the sediment content, the lower the efficiency of the pump, the smaller the flow rate, the corresponding reduction in head, and the corresponding increase in power. The wear and tear of the water pump by the sediment can be divided into three types: corrosion, cavitation and abrasion. Abrasion is caused by the friction and collision of hard solid particles in the water with the surface of the flow parts, which is a mechanical damage. Because the Yellow River water contains a large amount of sediment, it will cause serious wear on the pump. Generally speaking, the cause of wear is: the erosion force generated by the high-speed sandy water flow. When the sand with a certain particle size and hardness passes through the water pump at high speed, it will generate considerable abrasive force, which will peel off the fine particles on the metal surface layer by layer and cause surface damage. Therefore, high speed is the main cause of wear of the water pump. The high-speed sand-bearing water flow forms vortices and bends on the uneven surface of the metal, and the sand particles form repeated impacts on the surface to destroy the wall.