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渣漿泵的相似定律高心至特性曲線上的各點
相似定律研究的是兩臺相似泵的性能參數(H.O.P.).NPSH.之間的關系。高心至特性曲線上的各點稱為F況點它代表高心泵的一種特定的工作狀況,兩臺相似泵中,液體流功相似時對應的工況點稱為相似工況點,相似工倪點必須滿足以下相似定律,
(1)流量相似定律.其計算公式為:
(2)揚程相似定律,其計算公式為:
(3)功率相似定律,其計算公式為:
滿足式(1-51)、式(1 - 52)、式(1- 53)的工況為相似工況,也就是說,此三式是兩臺相似泵中相似工況點的換算關系式,但直接利用還有困難,因為效率未知。在都以水為介質、轉速和幾何尺寸都相差不大的情況下,可認為兩臺泵的相似工況點效率相等,當兩泵輸送的介質相同(ρ =p時,有:渣漿泵廠家
式(1-54)、式(1- 55)、式(1-56)統稱為相似定律,反映了兩臺相似泵性能參數之間的換算關系。
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.
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