双流道污水泵叶轮三维设计方法  

3-D Design Method of Double-channel Impeller of Sewage Pump

作　　者：张静[1] 齐学义[1] 冀宏[1] 杨国来[1] 侯祎华[1] 

机构地区：[1]兰州理工大学流体动力与控制学院

出　　处：《农业机械学报》2008年第10期65-70,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：甘肃省科技攻关计划项目(项目编号:2GS047-A52-011)

摘　　要：针对传统二维设计的双流道式污水泵叶轮容易出现的绘型图与实际木模偏差问题,研究直接在Pro/ENGINEER中进行叶轮的三维设计方法。二维绘型图则由三维投影得到,保证了设计结果的一致性。设计实例经试验表明此设计法的合理性。推导了采用变异的阿基米德螺线作为平面流道中线时,中线出口角与包角和变异系数之间的关系式,为设计中控制流道出口角提供了依据。给出了变异的阿基米德螺线法线方向上到叶轮外径距离的变化规律及断面面积的计算公式,并给出了确定流道出口点的新方法。Problem of disagreement between 2-D drawing and actual wood former of double-channel impeller of sewage pump most possibly encountered if the design is from traditional 2-D manner. Research was carried out for the method of 3 - D design directly in Pro/ENGINEER, so 2- D drawing could be produced by projecting through 3-D impeller designed. The procedure could secure the agreement between 2-D drawing and actual wood former. A practical design exemplified the correctness of the method by experiment. Additionally, a formula was deuced, which showed the relation between the outlet angle of center line of channel and wrap angle, variant coefficient, if archimedes spiral was assumed as the curve of center line of plate plane. It was the basis to control outlet angle of channel. Another formula was presented for the calculation of normal distance from points on the passage center line to outer diameter and formula of cross-section area as outlet point was also available. Based on them, a new method was developed for fin, ding out the outlet point.

关 键 词：叶轮 双流道 PRO/ENGINEER 三维设计 出口角 包角 

分 类 号：TH311[机械工程—机械制造及自动化]