環(huán)模制粒機可靠性設計與分析技術研究
[Abstract]:Ring mould granulator is the main processing equipment for pellet feed and biomass solid briquetting fuel. With the increasing demand of pellet feed and biomass solid briquetting fuel, the market demand is increasing. Based on the technical problem of poor reliability of ring die granulator in China, the reliability design and analysis technology of ring die granulator is studied in this paper, which provides a reference for the improvement design and reliability growth of ring die granulator. The main work of this paper is as follows: (1) according to the fault data collected, the reliability index of a certain type of ring model granulator is evaluated, and the distribution type of fault interval time of the model granulator is determined. Based on it, the reliability index of the granulator is deduced and calculated, which provides the basis for the dynamic reliability analysis of the ring mould granulator. (2) the key subsystem of the ring mould granulator is determined, and the failure mode of the key subsystem of the ring mold granulator is determined. According to the results of the analysis, (FMECA), puts forward some measures to ensure and enhance the reliability of the ring mould granulator. (3) the existing reliability distribution method, Fuzzy Analytic hierarchy process (FAHP), is improved. The improved fuzzy analytic hierarchy process (FAHP) is used to distribute the reliability of the ring mould granulator. The reliability indexes of each subsystem and parts of the granulator are determined. (4) the reliability analysis model of the core components of the granulator is established. The fatigue life reliability and wear reliability of the existing ring die are predicted, and the reliability of the ring die is analyzed. (5) the structural design scheme of the existing ring die is modified, and two new ring dies are proposed. The reliability analysis of the new ring die is carried out and compared with the existing ring die. The results show that the new designed die hole staggered angle is 60. The life distribution of the ring die is improved at the intersection of the flange and the outer wall of the ring die, and the reliability of the ring die is greatly improved, which provides a reference for the structure optimization and reliability growth of the ring die.
【學位授予單位】:南京理工大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:S817.1;TK6
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