Abstract: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 tra-jectory 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 passage 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.
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