本文较深入地分析了水轮机蜗壳水流的运动规律,压差的形成及计算,蜗壳差压测流现用公式的适用条件及精度范围。在此基础上,作者根据现场实践经验和对大量现场实测资料的分析统计,提出了精度更高的蜗壳差压测流计算新公式:Q=K·ΔH~2,并对8台机组的系数K值和指数x值进行了计算,得出了规律性的有价值的结果。 In this paper, the law of motion of volute flow, the formation and calculation of pressure differential, the applicable conditions and the accuracy range of differential pressure current measurement formula are analyzed. On this basis, based on the field practical experience and analysis and statistics of a large number of field measured data, the author put forward a new formula for calculating the differential pressure measured current of the volute with higher accuracy: Q = K · ΔH ~ 2, Coefficient K value and index value of x were calculated to obtain a regular and valuable results.