Numerical Simulation and Analysis of Rotary-typed Mass Finishing for Aeroengine Blisk
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摘要: 为探究航空发动机整体叶盘回转式滚磨光整加工的作用机理,基于离散元法对加工过程进行仿真计算。以叶片表面的Archard磨损量和累积接触能量为评价标准,研究滚抛磨块装入量和滚筒转速对加工效果的影响。结果表明:叶片型面的加工效率受工艺参数的影响较大,且叶背、叶盆呈现出明显的差异。回转式滚磨光整加工可以有效保证不同叶片间的加工均匀一致性,且在50%装入量、60 r/min转速条件下,同一叶片不同区域的加工均匀性最好。综合考虑加工效率与加工均匀性,优选以下参数范围:50%~60%装入量;0.65nmax~0.8nmax转速。Abstract: To explore the working mechanism of the rotary-typed mass finishing for aeroengine blisk, the processing cycles were simulated based on the discrete element method (DEM). The amount of Archard wear and the cumulative contact energy in the blade surface were used as the evaluation standard. The effects of the abrasive loading quantity and the barrel speed on the processing effect were studied. The results show that the processing efficiency of the blade profile is greatly affected by the processing parameters, and the convex and the concave show obvious differences. The rotary-typed mass finishing can effectively ensure the processing uniformity among the different blades, and under the loading quantityof 50% and rotary speed of 60 r/min, the processing uniformity in the different areas of the same blade profile is the best. Considering the processing efficiency and uniformity, the following parameter are preferred: the loading quantity of 50% ~ 60%; the rotary speed of 0.65nmax ~ 0.8nmax.
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Key words:
- blisk /
- mass finishing /
- discrete element method (DEM) /
- archard wear /
- uniformity
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表 1 材料的本征参数[18]
名称 泊松比 剪切模量/Pa 密度/(kg·m−3) 颗粒 0.21 1.24 × 1011 2675 滚筒 0.28 3.20 × 109 1150 工件 0.33 4.50 × 1010 4500 表 2 仿真所需的接触参数[18]
相互作用 碰撞恢复系数 静摩擦因数 滚动摩擦因数 颗粒-颗粒 0.75 0.30 0.03 颗粒-滚筒 0.50 0.26 0.10 颗粒-工件 0.75 0.30 0.05 -
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