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本文选取了型式相同、相对宽度b_2/D_2不同的七种工作轮,对它们的摩擦损失、轮阻损失和内(氵曳)漏损失作了似近的理论计算,并与已有的损失试验数据进行比较。按所得结果分析了b_2/D_2对效率的影响。同时,在流量、能量头和转数相同的条件下,分析和比较了三种典型工作轮(压缩机型、水泵型和闭式径向型)的主要参数和损失大小,得出这样一种看法,即在小流量情况下,压缩机型改为水原型并不一定有利。在上述基础上,提出了提高小流量机器效率的某些途径,并对四种方案作了具体计算,得出一些初步结论。
In this paper, seven kinds of work wheels with the same type and different relative widths b_2 / D_2 were chosen to make approximate theoretical calculations for their friction losses, wheel resistance losses and internal leakage losses. Compared with the existing loss tests Data is compared. According to the results, we analyzed the effect of b_2 / D_2 on the efficiency. At the same time, under the same conditions of flow rate, energy head and revolution number, the main parameters and losses of three typical working wheels (compressor type, water pump type and closed radial type) were analyzed and compared, The view that in the case of small traffic, the compressor prototype to water prototype is not necessarily beneficial. Based on the above, some ways to improve the efficiency of small-flow machines are put forward, and four schemes are concretely calculated, and some preliminary conclusions are drawn.