| 涡轮增压器旁通放气阀杆疲劳断裂研究 |
| |
| 引用本文： | 王正,王增全,郭凯,刁占英,王永青. 涡轮增压器旁通放气阀杆疲劳断裂研究[J]. 车用发动机, 2012, 0(1): 77-80 |
| |
| 作者姓名： | 王正 王增全 郭凯 刁占英 王永青 |
| |
| 作者单位： | 中国北方发动机研究所柴油机增压技术重点实验室;山西大同北方天力增压技术有限公司 |
| |
| 基金项目： | 国家自然科学基金项目(50905007);增压技术重点实验室基金项目(9140C3306131001) |
| |
| 摘 要： | 针对某型涡轮增压器旁通放气阀杆断裂故障,对断口进行了分析,确定了放气阀杆断裂为双向弯曲疲劳失效。在此基础上,运用有限元方法对放气阀杆断裂的失效机理进行了分析,并给出了相应的改进措施。研究表明,由于放气阀的一阶固有频率过低,落在发动机振动激励频率范围之内,很容易引起放气阀杆共振而发生疲劳断裂。建议对放气阀杆进行改进设计以提高其一阶固有频率;同时,结合发动机工作剖面,在设计阶段对放气阀进行动态设计。
|
| 关 键 词： | 涡轮增压器 放气阀杆 疲劳断裂 振动 失效分析 |
Study on the Fatigue Fracture of By-pass Valve Link of Turbocharger |
| |
| WANG Zheng,WANG Zeng-quan,GUO Kai,DIAO Zhan-ying,WANG Yong-qing. Study on the Fatigue Fracture of By-pass Valve Link of Turbocharger[J]. Vehicle Engine, 2012, 0(1): 77-80 |
| |
| Authors: | WANG Zheng WANG Zeng-quan GUO Kai DIAO Zhan-ying WANG Yong-qing |
| |
| Affiliation: | 1.National Key Laboratory of Diesel Engine Turbocharging Technology,China North Engine Research Institute,Datong 037036,China;2.Shanxi Datong North Tianli Turbocharging Technology Company,Datong 037036,China) |
| |
| Abstract: | For the failure of by-pass valve link of turbocharger,the fracture analysis was carried out and it was found that its failure mode was compound bending fatigue.Then,the failure mechanism of by-pass valve link was analyzed with the finite element method and the advanced measures were proposed.The result shows that the valve first-order natural frequency is lower and in the range of engine excited frequency,which makes the by-pass valve resonate and leads to fatigue fracture.To avoid the similar failure,the design of by-pass valve link should be improved to raise the first-order natural frequency.In addition,the dynamic design of by-pass valve should be carried out according to the operating section of engine. |
| |
| Keywords: | turbocharger by-pass valve link fatigue fracture vibration failure analysis |
| 本文献已被 CNKI 等数据库收录！ |
|
