Centrifugal Pump Impeller Cad System Development

At present, many of the CAD software of centrifugal pump have been developed in the DOS environment based on traditional structure programming language and the graphic support software is not adopted in these software, so that the software shows poor maintainability, long developing cycle and large cost. Furthermore, the output drawings of the software are not easily to be edited and plotted. Thus, it is difficult that the software is able to work out satisfied results. Based on the analysis of these shortcomings, guided by software engineering method, an opened, expandable and renewed centrifugal pump CAD system is established in the environment of Windows. By using the object-oriented programming languageisual Basic and supporting with AutoCAD R14 for Windows, a suit of CAD programs of the centrifugal pump impellers is developed, which takes in the program's advantage of the resources of the environment of Windows. A date also adopted technique is which can accept data and calculate geometrical of the dimensions as well as make the impeller pattern drawings. The drawings have been basically met the demand of practical engineering. The main research work in the thesis is the following: (1) The status and existing problems in mechanical and centrifligal pump CAD are analyzed thoroughly, and the important problems in that should be solved the centrifugal pump CAD system are made sure. (2) The theory and method for programming in software engineering arc adopted in the CAD system of centrifugal pump impeller, and the modularization, parameterization and function-opening design philosophy is proposed, in order that it be convenient to the system upgrading and transplanting. (3) The object-oriented programming language-Visual Basic is adopted to design impeller of centrifugal pump, and also graphic-supporting software-AutoCAD Rl 4 is chosen for graph editing, modifying and used to output the impeller pattern drawings demand of engineering practice. (4) A straightforward, concise and standard Windows human computer-interface is designed for the system, which makes the operation of the system very convenient.