开式叶轮 meaning in English

open impeller
u hrouded impeller
unshrouded impeller

For pump with open impeller , the diameter of solid particle in the liquid to be delivered should better not exceed the 30 % of the suction diameter of the pump
采用开式叶轮的泵，被输送液体中含有的固体颗粒直径不超过泵吸入口直径30 %为宜。
Distinctive centrifugal impeller to handle clean medium not containing solid particles , featured by little vibration , low noise and high efficiency ; open impeller to handle unclean liquid containing solid particles and short fiber , featured by stable operation and non - clogging
采用独特的离心式叶轮，供输送不含固体颗粒等清洁的介质，振动噪音低，效率高；采用开式叶轮，供输送不清洁带有固体颗粒及短纤维的液体，运行平稳、不堵塞。
In the first part , the method of velocity coefficient was used to design a 100mm diameter impeller with five single - arc - cylinder blades , and the method of velocity moment was applied to design the volute " s cross - section . the volute " s cross - section is a rectangle , which was designed as a whole structure with the front shroud of the pump . a special lighting window was designed on the side
在第一部分工作中，设计了一个带半开式叶轮的微型泵：叶轮外径100mm 、共5片单圆弧圆柱形叶片；蜗壳采用速度矩法设计，内为矩形断面，和泵壳前盖板为一整体、透明结构，侧面专门设计一个打光窗口。