期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：240
期号：3
页码：1-11
DOI：10.1088/1755-1315/240/3/032039
出版社：IOP Publishing
摘要：In order to study the influence of different posterior cavity structure on multistage stamping pump characteristics, pressure distribution and axial force, four different posterior cavity structures of arc-type, L-type, plane-type and molded line-type were designed and the full fluid domain models for single stage were established. The performance of the pump was analyzed and verified by experiment and numerical simulation respectively, so as to study the influence of posterior cavity on pressure distribution and flow state in the pump. The results showed that vortex appeared in the flow area between impeller and posterior cavity, it reacted on the fluid in impeller and guide vane, which could improve the single stage head and efficiency, but also increased the pressure pulsation and axial force. The ring cavity formed by bulkhead and shaft of L-type and molded line-type posterior cavity structure could act as balance room and reduce the total axial force, so as to reduce the wear and impact between rotor and pump body. L-type, plane-type and molded line-type posterior cavity could effectively suppress pressure pulsation and improve the operation stability of the pump.
