Tổng hợp một số vấn đề trong thực tế thiết kế bơm hướng trục Ns cao

Abstract

High n_s axial pumps usually have the specific speed  n_s>1000 rev/min. Most of capitalist countries are less interested in high n_s pumps. The n_s of popular pumps of the former Soviet Union were only in the range of 500 rev/min to 900 rev/min. In Vietnam, the research on high n_s pumps in recent years has achieved certain results. Most of these high n_s pumps have the reference of some parameters and characteristics of OP6 pump with n_s=900 rev/min of the former Soviet Union. Through the analysis of the influence of the main parameters on the axial pumping characteristics, the article summarizes the issues to be noted in the actual design, and highlights the  results of high n_s pumps researching in our country in recent years.