摘要
分析了双流道式污水泵叶轮造型的特殊性及其特点,研究了采用三维建模软件对双流道叶轮进行三维造型的方法.用投影方法生成空间流道中线,以此作为原始轨迹,各断面形状作为混合用截面,使用扫描混合命令形成内流道.按内流道中线规律延长内流道中线到叶轮外径,以投影方法得到空间曲线作为原始轨迹,按外流道截线位置放置适当截面,由扫描混合命令形成外流道.指出在二维绘型图转化为三维造型时,叶轮可能会出现的无法形成有效内流道的问题,此时先调整断面的空间安放方向与位置,再调整断面形状和流道中线.
The impeller of double channel sewage pump is different from common centrifugal pump. So the method of building 3D model needs to be further explored. Modeling 3D shape of the impeller in Pro/ E was carried out. 3D passage center-line is generated by projection, then it is made as the original trajectory to produce inner passage by command sweep and blend, with passage cross-sections as sections. Inner passage center-line is extended to the outer diameter of the impeller with its rule formula, the curve resulted is regarded as a original trajectory, and sections are placed in proper position through outer pas- sage profile line. Then the outer passage can be made by command sweep and blend. A failure to form double-inner-channel is very likely to be encountered during the process of transforming 2D drawing to 3D model of double-channel impeller. If such thing happens, the position and direction of cross-section should be adjusted first, then the shape of cross section and passage center-line can be changed.
出处
《排灌机械》
2008年第2期15-18,共4页
Drainage and Irrigation Machinery
基金
甘肃省科技攻关计划项目(2GS047-A52-011)
