王正¹  王增全¹  邢衛(wèi)東¹  蔣婧²  何洪¹  門日秀¹
（1. 中國北方發(fā)動機(jī)研究所  柴油機(jī)增壓技術(shù)重點實驗室 天津 300400；
2. 中國人民解放軍96627部隊  北京）

 摘  要：以某型車用增壓器渦輪為例，研究了渦輪葉片葉根疲勞可靠性評價方法與疲勞壽命概率分布特征。基于發(fā)動機(jī)耐久性考核試驗剖面，分析了增壓器渦輪葉片葉根部位的應(yīng)力歷程。針對渦輪葉片葉根疲勞失效模式，建立了以發(fā)動機(jī)耐久性試驗剖面循環(huán)次數(shù)為壽命度量指標(biāo)的渦輪可靠性評價模型，研究了渦輪葉片葉根疲勞可靠度與失效率變化規(guī)律以及疲勞壽命概率分布特征，給出了滿足不同可靠度要求的渦輪葉片葉根疲勞壽命。
關(guān)鍵詞：車用增壓器；渦輪葉片；疲勞可靠性；概率特征；可靠壽命
 

Study on the Fatigue Reliability of Blade Root of Turbine of Turbocharger for Vehicle Application
WANG Zheng1  WANG Zengquan1  XING Weidong1  JIANG Jing2  HE Hong1  MEN Rixiu1
(1. National Key Laboratory of Diesel Engine Turbocharging Technology, China North Engine Research Institute, Tianjin 300400；
2. 96627 troops, People's Liberation Army, China, Beijing)

 
Abstract: Taking a turbine of turbocharger for vehicle application as an example, the method for evaluating the fatigue reliability and the fatigue life probabilistic characteristics of blade root of turbine is studied. Based on the endurance test profile of vehicle engine, the fatigue stress spectrum of turbine blade root is analyzed. Then, with the cycles of the endurance test profile of vehicle engine as life parameter, the reliability model of turbine with blade root fatigue failure mode is developed, the rules that the reliability and failure rate of turbine with the failure mode of blade root fatigue change are studied, and the reliable life of turbine with blade root fatigue failure mode is calculated.
Key words: turbocharger for vehicle application; turbine; blade; fatigue reliability; life
 
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