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本文阐述了通过水力模型试验研究,初步摸索到的有关叶轮进、出口参数及空间导壳参数对潜水泵性能及效率影响的规律。 为了提高潜水泵的效率,可以采取缩小进口直径D_e,加大叶片安放角α_(?),叶片向进口方向延伸等措施来满足对性能的要求。本文推荐进口速度系数K_0=3.7～4.1范围,叶片进口冲角为8°～15°。两叶片之间进口边面积形状为正方形时,泵的水力性能较好。 空间导壳能量转换得不好,本文作者们认为,必须从理论上修正离心泵叶轮外径D_2的计算公式才能达到性能要求。本文推荐了几种不同的比转速n_s的速度系数K_(m2)、K_(μ2)范围。 空间导壳的喉部面积F_3与叶轮出口面积F_2之间的相互关系是决定泵性能好坏的重要因素之 ,本文推荐F_3/F_2在0.7～1范围内。无论导壳叶片数Z_H与叶轮叶片数Z相同或不相同时均无振动与噪音。
This article elaborates the rules of the submersible pump performance and efficiency initially obtained through the hydraulic model test and research on the impeller inlet and outlet parameters and the space guide shell parameters. In order to improve the efficiency of the submersible pump, we can reduce the inlet diameter D_e, increase the blade angle α_ (?), Blade extension to the inlet direction and other measures to meet the performance requirements. This article recommended the import rate coefficient K_0 = 3.7 ~ 4.1 range, blade angle of incidence of imports for the 8 ° ~ 15 °. When the shape of the area between the two blades is square, the hydraulic performance of the pump is better. The energy transfer of the space guide shell is not good, and the authors believe that it is necessary to theoretically correct the formula of centrifugal pump impeller diameter D_2 in order to meet the performance requirements. In this paper, we propose several different speed coefficients K_ (m2) and K_ (μ2) for speed n_s. The relationship between the throat area F_3 of the space guide shell and the exit area F_2 of the impeller is an important factor that determines the performance of the pump. In this paper, F_3 / F_2 is recommended to be in the range of 0.7 to 1. No vibration and noises no matter the number of guided shell blades Z_H and the number of impeller blades Z are the same or not.