General Quality-oriented 1+3+X Designing Method Of The Assembly Structure Of The Shrouded Impeller

Large turbine compressor is used widely in the petrochemical, natural gas, metallurgy, space, utilities (gas meters), pharmaceutical, acid, environmental protection, textiles and other fields of national defense research; it is the heart of basic industry. As a key component of the large compressor, rotor system design is very important to ensure the whole compressor, even the whole supporting device to operate reliably and stably. As one of the key technologies, the importance of rotor mechanical properties analysis and re-engineering methods of structure are gradually revealed.The topic is guided by design theory of 1+3+X,which is brought forward by Professor Wen Bangchun of Northeastern University for the past few years, it is combined visual theory, finite element analysis theory and reliability analysis theory to found the CAX of supplementary integrated environment through the PC platform, then the environment is used to discuss the application of the design method of 1+3+X in the functional research and the process of redesigned of the product. Chapter 1 of this article is given a more detailed exposition about background, meaning, purpose and development at home and abroad of the subject. Chapter 2 is firstly introduced the integrated design method oriented the generalized quality which is brought forward by Professor Wen Bangchun of Northeastern University, and it is used to illuminate the working principle and the structural features of the large compressor and assembly structure of the impeller oriented integrated design method Ontology of and of to illustrate. After the design method of 1+3+X oriented the assembly structure of the impeller is created, the technical flow of the subject is then determined. Chapter 3 is elaborated the building method of the CAX integrated environment, and is explained the basal theory including structural FEM basis, FEM of impeller modal analysis, FEM of contact nonlinear and the probability FEM and derivation of formula is given. Chapter 4 is done a more comprehensive analysis on mechanical properties of a certain type of impeller assembly structure, then the functional parameters of the system and the key part of it is gotten in the process of assembly and operation. Using the reliability method, the reliability of the system in the given conditions to maintain their functional is evaluated. According to the analysis results of Chapter 4, in Chapter 5, a structural re-designing program of the assembly is put forward and contrasted to the prototype impeller, the rationality and functionality of the new structure is evaluated. Chapter 6 is the whole-length summary and further work prospects.The method of the 1+3+X is used to complete the functional analysis, re-designing the structure of the closed impeller assembly group which is used in a large-scale compressor and the assessment of mechanical properties of the new assembly structure, and all those can be done to realize a visualization of analysis process, intelligent research of structure and properties and optimization rapidly of key structural parameter. At the same time, the method of design and analysis constructed in this article has certain universal significance; it lays a more comprehensive technical basis for the future to solve the problems of assembly structure for other types of impeller.