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渣漿泵的相似定律高心至特性曲線(xiàn)上的各點(diǎn)
相似定律研究的是兩臺(tái)相似泵的性能參數(shù)(H.O.P.).NPSH.之間的關(guān)系。高心至特性曲線(xiàn)上的各點(diǎn)稱(chēng)為F況點(diǎn)它代表高心泵的一種特定的工作狀況，兩臺(tái)相似泵中，液體流功相似時(shí)對(duì)應(yīng)的工況點(diǎn)稱(chēng)為相似工況點(diǎn)，相似工倪點(diǎn)必須滿(mǎn)足以下相似定律，
(1)流量相似定律.其計(jì)算公式為:
(2)揚(yáng)程相似定律,其計(jì)算公式為:
(3)功率相似定律,其計(jì)算公式為:
滿(mǎn)足式(1-51)、式(1 - 52)、式(1- 53)的工況為相似工況，也就是說(shuō)，此三式是兩臺(tái)相似泵中相似工況點(diǎn)的換算關(guān)系式,但直接利用還有困難，因?yàn)樾饰粗?。在都以水為介質(zhì)、轉(zhuǎn)速和幾何尺寸都相差不大的情況下,可認(rèn)為兩臺(tái)泵的相似工況點(diǎn)效率相等，當(dāng)兩泵輸送的介質(zhì)相同(ρ =p時(shí),有:渣漿泵廠(chǎng)家
式(1-54)、式(1- 55)、式(1-56)統(tǒng)稱(chēng)為相似定律，反映了兩臺(tái)相似泵性能參數(shù)之間的換算關(guān)系。
Similarity law of slurry pump
The similarity law studies the relationship between the performance parameters (h.o.p.) and NPSH. Of two similar pumps. Each point on the high center to characteristic curve is called the f-point, which represents a specific working condition of the high center pump. In two similar pumps, the corresponding working point when the liquid flow work is similar is called the similar working point. The similar working point must meet the following similar laws,
(1) The calculation formula of the flow similarity law is as follows:
(2) The similarity law of lift is calculated as follows:
(3) The power similarity law is calculated as follows:
The conditions of formula (1-51), formula (1-52) and formula (1-53) are similar, that is to say, these three formulas are conversion relations of similar working points in two similar pumps, but direct utilization is still difficult because the efficiency is unknown. When water is used as the medium, the speed and geometric dimension are almost the same, it can be considered that the efficiency of similar operating points of the two pumps is equal. When the medium delivered by the two pumps is the same (ρ = P, there are: slurry pump manufacturer
Formula (1-54), formula (1-55) and formula (1-56) are collectively referred to as the law of similarity, reflecting the conversion relationship between the performance parameters of two similar pumps.
