Centrifugal Fan Series Cad System

After the analysis of the main design tasks of centrifugal fan, a frame to develop CAD system for the series-product of centrifugal fan is formed on the basis of existing PC CAD software, and several problems relating closely to software development are studied. The methods of theory design and similar design for centrifugal fan are used in the article for the development and study of integrated CAD system for centrifugal fan. The purpose of this study is for the automatism-design of centrifugal fan and CAD system of centrifugal fan that can response quickly according to user抯 design. All those are supported by CATIA. The 3D case-based modal shape library on CATIA case-based modal parameter library on EXCEL and standard parameter database for centrifugal fan on ACCESS must be set up . The 3D modal case-based shape library, which can be parameterized, is supported by the functions of CATIA, which are tabledimension driver ~. products assemble relation and relation between 3D modal and 2D draft and so on . User interface for the design of centrifugal fan is built by VB, which is supported by the method of modularity and the technology of COM, and integrate those libraries. By doing those, the CAD system can be integrated, which offer 2D engineering drawings user needs, and automatically design centrifugal fan on the theories of theory-design and similar- design by driving the case-based modal library.