胶乳分离机高速转鼓应力研究

Stress Analysis on Rotating-Drum of Latex-Separator

鉴于碟式分离机转鼓缺乏应力计算的成熟方法,以胶乳分离机转鼓为对象,研究了静应力特性,建立了力学模型,分析了载荷与几何约束,构建了有限元模型,分析比较了关键件不同工况下的应力及分布,分析结果表明:转鼓整体应力水平分布不均匀性明显,转鼓体沉渣区、侧壁等位置局部应力水平很高,转鼓体最大应力的位置,与转鼓体实际裂纹失效发生部位相符。建模方法、分析结果对转鼓设计、强度评价、结构优化等具有借鉴价值。

In view of lacking well-developed stress calculation method for rotating drum-assembly of disc-separator,the simplified drum-assembly of latex separator was taken as research object,and the statics stress characteristics was studied. Mechanical models of main elements were established by force analysis. Constrained boundary conditions of Finite element analysis（ FEA） were determined. Analysis model of FEA was set up. Stress characteristics of drum elements was analyzed under idle status,work status and over speed status. Drum stress distribution regularities were compared in four working conditions. Study results show that： stress distribution for the overall drum is nonhomogeneous,sediment area and side wall of drum-base have high local stress. Max-stress position of FEA agrees with experimental crack extending point in the drum-base. FEA modeling method and the results provides important guidance and reference for drum design,strength assessment and structure optimization.