关键词: 螺杆泵；设计；特性试验；数值计算

Abstract:

The single screw pump performance and the similarity theory application were studied. The pump performance variation principles were conducted by analyzing the influence of hydranlic structure coefficients κ1 and κ2, specific speed ns on performance curves. Computational formulae of screw diameter D, screw-pitch and eccentricity e were deduced. Based on the summary of excellent hydraulic models, numerical analyses were applied to fit out the formulae for coefficients κ1 and κ2, pump volume efficiency ηV,while the single screw design method was built. The example design cases prove that the design method proposed herein is of high accuracy and practice, and it can embody some measures to improve the screw pump performance.

Key words: screw pump, design, performance, test, numerical calculation