| 高强化柴油机活塞异型销孔结构设计与试验研究 |
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| 引用本文： | 刘畅,张卫正,刘雨薇.高强化柴油机活塞异型销孔结构设计与试验研究[J].车用发动机,2011(5). |
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| 作者姓名： | 刘畅 张卫正 刘雨薇 |
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| 作者单位： | 北京理工大学机械与车辆学院,北京,100081 |
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| 摘 要： | 针对高强化柴油机活塞,研究了网格数量和活塞销孔棱缘耦合应力的收敛性关系,进行了精确的活塞耦合应力计算;研究了异型销孔结构对活塞应力分布的影响规律;根据耦合应力计算结果,选定异型销孔位置和形状,设计双侧圆锥形异型销孔并进行耦合应力计算,与圆形销孔结构活塞对比可知,异型销孔结构可以大幅度降低销孔棱缘的应力集中,活塞的承载能力有所提高。利用活塞销孔疲劳试验机进行异型销孔活塞的疲劳试验,试验完成1.0×107个循环,活塞销孔表面接触良好,说明双侧圆锥形异型销孔的结构设计满足发动机可靠性要求。
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| 关 键 词： | 柴油机 活塞 异型销孔 结构设计 疲劳试验 |
Structural Design and Experimental Study on Piston Non-circular Pinhole for Highly-intensified Diesel Engine |
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| LIU Chang,ZHANG Wei-zheng,LIU Yu-wei.Structural Design and Experimental Study on Piston Non-circular Pinhole for Highly-intensified Diesel Engine[J].Vehicle Engine,2011(5). |
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| Authors: | LIU Chang ZHANG Wei-zheng LIU Yu-wei |
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| Institution: | LIU Chang,ZHANG Wei-zheng,LIU Yu-wei(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | For the piston of highly-intensified diesel engine,the relationship between mesh number and coupling stress convergence at the piston pinhole edge was studied.Then the accurate calculation of coupling stress was carried out.The influence of non-circular pinhole structure on piston stress distribution was researched.According to the calculated results of coupling stress,the initial positions and angles of non-circular pinhole were determined,the conical non-circular pinholes on both sides were designed and t... |
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| Keywords: | diesel engine piston non-circular pinhole structural design fatigue test |
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