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渣浆泵的相似定律高心至特性曲线上的各点
添加时间:2020.02.07

渣浆泵的相似定律高心至特性曲线上的各点
    相似定律研究的是两台相似泵的性能参数(H.O.P.).NPSH.之间的关系。高心至特性曲线上的各点称为F况点它代表高心泵的一种特定的工作状况,相似泵中,体流功相时对应的况点称为相似工况点,相似工倪点必须满足以下相似定律,
(1)流量相似定律.其计算公式为:
(2)扬程相似定律,其计算公式为:
(3)功率相似定律,其计算公式为:
    满足式(1-51)、式(1 - 52)、式(1- 53)的工况为相似工况,也就是说,此三式是两台相似泵中相似工况点的换算关系式,但直接利用还有困难,因为效率未知。在都以水为介质转速和几何尺寸都相差不大的情况下,可认为两台泵的相似工况点效率相等,当两泵输送的介质相同(ρ =p,:渣浆泵厂家

(1-54)、式(1- 55)、式(1-56)统称为相似定律,反映了两台相似泵性能参数之间的换算关系。

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.