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渣漿泵運(yùn)行工作點(diǎn)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(yáng)程是隨流量的變化而變化，每一個(gè)流量都有相對(duì)應(yīng)的揚(yáng)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(diǎn)上呢?它是由外界的負(fù)荷，即裝置揚(yáng)程來(lái)決定的。所以如果將泵的流量-揚(yáng)程性能曲線與裝置揚(yáng)程特性曲線按相同比例尺寸畫(huà)到同張圖上，如圖4-1所示，AB、CE兩曲線相交于D點(diǎn)，D點(diǎn)就是泵的運(yùn)行工作點(diǎn)。因?yàn)樵?/span>D點(diǎn)，水泵供給的能量與管路內(nèi)液體流動(dòng)時(shí)所消耗的能量得到平衡。如果假設(shè)在G點(diǎn)工作，泵所供給的能量大于管路內(nèi)液體流動(dòng)所消耗的能量，那么多余的能量將使管內(nèi)的液體加速，使流量增加，泵的工作點(diǎn)就會(huì)向右移動(dòng)，一直到D點(diǎn)能量平衡為止。如果假設(shè)在F點(diǎn)工作，泵所供給能量小于管路內(nèi)液體流動(dòng)所消耗的能量，管內(nèi)流動(dòng)液體減速，使流量減少， 工作點(diǎn)向左移動(dòng)，直到D點(diǎn)平衡為止。
根據(jù)運(yùn)行工作點(diǎn)D點(diǎn)對(duì)應(yīng)的效率η曲線，如果是效率最高點(diǎn)或是在高效區(qū)，那么泵運(yùn)行最為經(jīng)濟(jì)，最為節(jié)能，如果D點(diǎn)偏離效率最高點(diǎn)較大時(shí)，就不經(jīng)濟(jì)。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
