空压机铝连杆疲劳强度分析
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摘要
简化空压机活塞连杆运动机构,建立活塞连杆的力学模型。对连杆进行力学分析,得到连杆在卸荷和负荷条件下的载荷曲线。运用数值模拟的方法对铝连杆进行疲劳强度分析,得到连杆在不同工况下的受力云图和疲劳安全系数云图。根据分析结果对铝连杆进行改进并通过恒定负荷比法对改进的铝连杆进行实验验证。实验结果表明:改进后连杆的疲劳强度提高了约50%,改进效果明显。
The mechanical model of piston Con-rod is established by simplifying the piston Con-rod movement mechanism of Air compressor. By the mechanical analysis of the Con-rod, get the load curve of the Con-rod under unloading and loading conditions. Establish the FEA model of the Con-rod, through the mechanical analysis of the Con-rod, get the stress cloud and fatigue safety factor cloud under different working conditions. The analysis results show that the fatigue strength of the Con-rod is directly affected by the structural characteristics of the Con-rod. To meet design requirements, improve the Con-rod. The fatigue strength of the improved Con-rod increased by 50%, meets the Con-rod fatigue strength design requirements. The test results show that the improved fatigue strength of the Con-rod is increased by 50%, the improvement effect is obvious.
The mechanical model of piston Con-rod is established by simplifying the piston Con-rod movement mechanism of Air compressor. By the mechanical analysis of the Con-rod, get the load curve of the Con-rod under unloading and loading conditions. Establish the FEA model of the Con-rod, through the mechanical analysis of the Con-rod, get the stress cloud and fatigue safety factor cloud under different working conditions. The analysis results show that the fatigue strength of the Con-rod is directly affected by the structural characteristics of the Con-rod. To meet design requirements, improve the Con-rod. The fatigue strength of the improved Con-rod increased by 50%, meets the Con-rod fatigue strength design requirements. The test results show that the improved fatigue strength of the Con-rod is increased by 50%, the improvement effect is obvious.
引文
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[2]谈梅兰,武国玉,梁福祥.基于ABAQUS的连杆疲劳分析[J].中国机械工程,2013,54(24):634-637.
[3]LIU Y Q,JIE W Q,GAO Z M.Rotary bending fatigue behavior of A356-T6 aluminum alloys by vacuum pressurizing casting[J].Research&Development,2015,12(5):326-328.
[4]王银燕,张鹏奇,王善.柴油机连杆杆身疲劳强度可靠性分析[J].哈尔滨工程大学学报,2001,22(1):67-68.
[5]刘晓叙,肖迪,蒲虎.往复活塞式空压机连杆有限元分析与结构优化研究[J].四川理工学院学报,2015,28(2):18-20.
[6]张瑛,张庆功.W2.85型空压机曲轴-连杆-活塞机构的运动学仿真[J].煤矿机械,2008,29(7):60-62.
[7]赵丽娟,孙晓娜,张佃龙.掘进机铲板有限元疲劳分析[J].机械设计与研究,2012,28(5):120-122.
[8]姜勇,杨道斋,张洪信.轴向型三缸内燃机连杆优化设计[J].机械设计与研究,2010,26(3):57-60.
[9]JUAREZ C,RUMICHE F,ROZAS A,et al.Failure analysis of a diesel generator connecting rod[J].Case Studies in Engineering Failure Analysis,2016(7):24-31.
[10]王振成,吴耀宇,刘宏宇.零件在腐蚀疲劳下的机械强度[J].机械设计与研究,2014,30:59-60.
[11]JOZEF S,GRZEGORZ S.A fatigue life calculation method for structural elements made of D16CzA aluminum alloy[J].Polish Maritime Research,2010,17(3):8-17.
[12]廖吉华,程仁庆,黄伟.基于多体动力学的曲轴疲劳强度分析[J].汽车零部件,2016(8):24-27.
[13]李惠远,何才.汽车发动机连杆疲劳试验方法[J].汽车工艺与材料,2005(10):30-31.
[14]刘宏瑞.连杆疲劳试验系统开发与研究[D].杭州:浙江大学,2012.
[15]郝志勇,雷耀龙,毛君.采煤机连接架工况载荷试验测试与疲劳寿命研究[J].机械设计与研究,2017,33(3):120-125.