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螺栓预紧力对内燃机连杆疲劳特性的影响

发表时间:2017-07-31  浏览量:260  下载量:32
全部作者: 孙剑波,郝彩哲,马岩,宋晓明,贾志宁
作者单位: 承德石油高等专科学校机械工程系;承德苏垦银河连杆股份有限公司;河北省仪器仪表工程技术研究中心
摘 要: 连杆螺栓连接连杆盖与连杆体,使二者在任何工况下均能可靠结合,其对连杆的可靠性和寿命影响很大。基于某型号内燃机连杆组件,分析连杆螺栓在20~35 kN预紧力情况下连杆的疲劳特性。运用Pro/E建立包括活塞销、衬套、轴瓦、连杆、大端盖、连杆螺栓在内的连杆模型,通过专用有限元分析软件MSC. Marc和MSC. Patran分析连杆组件的应力分布和疲劳安全系数。结合连杆的工作条件和应力场,确定了发动机/连杆正常工作时,连杆体和连杆盖之间螺栓预紧力的合理值。该研究为提高连杆的可靠性和寿命提供了重要参考。
关 键 词: 机械设计;螺栓预紧力;疲劳特性;内燃机
Title: Influence of bolt pretightening force on fatigue characteristics of connecting-rod of internal combustion engine
Author: SUN Jianbo, HAO Caizhe, MA Yan, SONG Xiaoming, JIA Zhining
Organization: Department of Mechanical Engineering, Chengde Petroleum College; Chengde Suken Yinhe Connecting Rod Co., Ltd.; Hebei Instrument & Meter Engineering Technology Research Center
Abstract: Connecting-rod bolt connects the cap and body of the connecting-rod, and guarantees that they can be combined reliably under any operating conditions, so it has a great impact on the reliability and fatigue safety factor of the connecting-rod. The main work of this paper was to analyze the fatigue characteristics of connecting-rod under the condition of 20-35 kN bolt pretightening force based on a certain type of internal combustion engine connecting-rod assembly. The connecting-rod model including piston pin, bushing, bearing, connecting-rod, cap and connecting-rod bolt was set up by using Pro/E software. The stress distribution and fatigue safety factor of the connecting-rod components were obtained by using special finite element analysis software MSC. Marc and MSC. Patran. The reasonable value of bolt pretightening force between body and cap with normal operation of engine/rod was determined by combining the working conditions and stress field of the connecting-rod. The research work provides an important reference for improving the reliability and service life of connecting-rod.
Key words: mechanical design; bolt pretightening force; fatigue characteristics; internal combustion engine
发表期数: 2017年7月第14期
引用格式: 孙剑波,郝彩哲,马岩,等. 螺栓预紧力对内燃机连杆疲劳特性的影响[J]. 中国科技论文在线精品论文,2017,10(14):1551-1556.
 
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