基于正交试验法的破碎齿结构优化设计
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摘要
为提高分级破碎机破碎齿的强度,找出影响破碎齿强度的主要结构参数,基于正交试验法,以降低等效应力、减小质量为优化目标,对其主要结构参数设计了三因素三水平的试验方案;利用极差分析法对试验结果进行分析,确定出各结构参数对优化目标影响的主次顺序;结合综合平衡法,得出最优结构参数方案;优化后的破碎齿最大等效应力比优化前减小了12.06%,质量减轻8.43%,安全系数提高13.71%;优化后的破碎齿既实现了轻量化,又提高了强度,验证了优化方案的有效性。
In order to improve the strength of the teeth of sizer and find out the main structural parameters affecting the strength of the teeth,based on the orthogonal test method,a three-factor and three-level test scheme is designed for main structural parameters to reduce the equivalent stress and the mass of teeth as the target of optimization. The test results are analyzed by range method to determine the primary and secondary influence order of each structural parameter on the optimization target, then the optimal structural parameter scheme is obtained through the integrated balance method. After optimization,the maximum equivalent stress of teeth is reduced by 12. 06%,the mass is reduced by 8. 43%,and the safety factor is increased by 13. 71%. After optimization,the weight of teeth is reduced and the strength is improved. The optimization scheme effectiveness is verified.
In order to improve the strength of the teeth of sizer and find out the main structural parameters affecting the strength of the teeth,based on the orthogonal test method,a three-factor and three-level test scheme is designed for main structural parameters to reduce the equivalent stress and the mass of teeth as the target of optimization. The test results are analyzed by range method to determine the primary and secondary influence order of each structural parameter on the optimization target, then the optimal structural parameter scheme is obtained through the integrated balance method. After optimization,the maximum equivalent stress of teeth is reduced by 12. 06%,the mass is reduced by 8. 43%,and the safety factor is increased by 13. 71%. After optimization,the weight of teeth is reduced and the strength is improved. The optimization scheme effectiveness is verified.
引文
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[2] 贡凯军,杨庆佛,程明琦,等.新型双齿辊破碎机辊齿设计理论研究[J].太原工业大学学报,1996 (1):45-49,67.
[3] 刘向东.MMD500双齿辊破碎机应用实践及改进[J].山西大同大学学报(自然科学版),2011 (6):65-66,83.
[4] 王保强,李朋,张明远,等.分级破碎装备的技术异同与发展前景[J].选煤技术,2019 (1):58-61.
[5] 贡凯军,诸文农.新型双齿辊破碎机辊齿受力工况及其有限元[J].吉林工业大学学报,1994(4):16-20.
[6] 王保强.SSC大处理能力分级破碎机破碎齿应力分布仿真研究[J].煤炭工程,2011 (5):116-118.
[7] 庞超明,黄弘.试验方案优化设计与数据分析[M].南京:东南大学出版社,2018.