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渣漿泵運行工作點泵的性能曲線知道
由第二章第八節(jié)泵的性能曲線知道，泵的揚程是隨流量的變化而變化，每一個流量都有相對應的揚程、功率、效率及汽蝕余量。從零流量到最大流量為條連續(xù)曲線，如圖4-1AB線所示。那么泵工作在哪一點上呢?它是由外界的負荷，即裝置揚程來決定的。所以如果將泵的流量-揚程性能曲線與裝置揚程特性曲線按相同比例尺寸畫到同張圖上，如圖4-1所示，AB、CE兩曲線相交于D點，D點就是泵的運行工作點。因為在D點，水泵供給的能量與管路內液體流動時所消耗的能量得到平衡。如果假設在G點工作，泵所供給的能量大于管路內液體流動所消耗的能量，那么多余的能量將使管內的液體加速，使流量增加，泵的工作點就會向右移動，一直到D點能量平衡為止。如果假設在F點工作，泵所供給能量小于管路內液體流動所消耗的能量，管內流動液體減速，使流量減少， 工作點向左移動，直到D點平衡為止。
根據運行工作點D點對應的效率η曲線，如果是效率最高點或是在高效區(qū)，那么泵運行最為經濟，最為節(jié)能，如果D點偏離效率最高點較大時，就不經濟。渣漿泵廠家
Know the performance curve of the pump at the operation point of the slurry pump
It is known from the performance curve in Section 8 of Chapter 2 that the head of the pump changes with the flow, and each flow has its corresponding head, power, efficiency and NPSH. There are continuous curves from zero flow to maximum flow, as shown in line 4-1ab. So where does the pump work? It is determined by the external load, that is, the head of the device. Therefore, if the flow head performance curve of the pump and the head characteristic curve of the device are drawn on the same drawing in the same scale, as shown in Figure 4-1, the AB and CE curves intersect at point D, point D is the operating point of the pump. Because at point D, the energy supplied by the pump is balanced with the energy consumed when the liquid in the pipeline flows. If it is assumed that the energy supplied by the pump is greater than the energy consumed by the liquid flow in the pipeline when working at point G, the excess energy will accelerate the liquid in the pipeline, increase the flow rate, and the working point of the pump will move to the right until the energy balance at point D. If it is assumed to work at point F, the energy supplied by the pump is less than the energy consumed by the liquid flow in the pipeline. The liquid flow in the pipeline slows down to reduce the flow, and the working point moves to the left until point D is balanced.
According to the efficiency η curve corresponding to point D of operation point, if it is the highest efficiency point or in the high efficiency area, the pump operation is the most economical and energy-saving, if point d deviates from the highest efficiency point, it is not economical. Slurry pump manufacturer
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