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Dynamic characteristics of annular seals in multi-stage centrifugal pumps

Published:2015-04-08 author:GUO Jia，WU Fei，HE Chao-hui Browse: 2824 Check PDF documents

Dynamic characteristics of annular seals in

multi-stage centrifugal pumps

GUO Jia，WU Fei，HE Chao-hui

（Institute of Pumps，Zhejiang Institute of Mechanical & Electrical Engineering Co.，Ltd.，Hangzhou 310021，China）

Abstract：Aiming at the problem of annular seals in multi- stage centrifugal pumps，a theoretical method was proposed，boundary

condtions was improred. The control equations with these new boundary conditions were solved with shooting method using Matlab.

Meanwhile，VB combined with dynamic linking library（DLL）was used for the software interface design，data transmission and routine

call. The results show that the program run smoothly and predicted the dynamic characteristics of the annular seals accurately.

Key words：outlet pressure coefficient；shooting method；annular seals；finite- length method；dynamic linking library（DLL）；

admixture programming；

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