带传扭销的环形平面接触轴段扭转特性研究  

Torsional Behavior of Annular Flat Contact Shaft Segment Attached with Torsion Pins

作　　者：夏凯[1,2] 孙岩桦[1,2] 卓明 赵世全[3] XIA Kai;SUN Yanhua;ZHUO Ming;ZHAO Shiquan(School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University,Xi’an 710049,China;Dongfang Turbine Co.,Ltd.,Deyang,Sichuan 618000,China)

机构地区：[1]西安交通大学机械工程学院,西安710049 [2]西安交通大学机械结构强度与振动国家重点实验室,西安710049 [3]东方汽轮机有限公司,四川德阳618000

出　　处：《西安交通大学学报》2018年第9期82-88,共7页Journal of Xi'an Jiaotong University

基　　金：陕西省重点研发计划资助项目(2017ZDXM-GY-013);国家"973计划"资助项目(2013CB035705)

摘　　要：为了研究重型燃气轮机压气机转子中常用的带传扭销的环形平面接触轴段的扭转特性,提出了带传扭销的环形平面接触轴段扭转变形双线性解析模型。采用三维有限元数值计算,对理论模型进行了验证,并在此基础上分析了压紧力、摩擦因数、传扭销个数和传扭销直径等对该模型的两个线性段扭转刚度、双线性转折点扭矩和接触界面的传扭能力等关键参数的影响规律。研究结果表明,环形接触平面滑移前的扭转刚度和连续轴段的扭转刚度基本相同,环形接触平面滑移后的扭转刚度则由传扭销的纵向剪切刚度决定,而双线性转折点的扭矩与预应力和摩擦因数成正比。研究结果对工程应用中带传扭销环形平面接触界面的设计及重型燃气轮机转子扭转动力学分析具有参考价值。Annular flat contact interface attached with torsion pins is common in compressor rotors of heavy-duty gas turbine.To study the torsional behavior of annular flat contact shaft segment attached with torsion pins,a bilinear model of torsional deformation is proposed.Numerical calculation with three-dimensional finite element model is conducted to validate the theoretical model.Then,the effects of pre-stress,friction coefficient,number of pins and diameter of pin on the key parameters of the bilinear model,such as the torsional stiffness of two linear segments,the torque at the bilinear inflection point of two linear segments,and the torque loading capability of contact interface,are analyzed.The results show that the torsional stiffness before the slip of the annular contact interface is almost the same with that of continuous shaft section,however,after slip it is determined by the longitudinal shear stiffness of pins.In addition,the torque at the bilinear inflection point of two linear segments is proportional to the pre-stress and friction coefficient.

关 键 词：重型燃气轮机 转子 平面接触 传扭销 扭转刚度 

分 类 号：TH113[机械工程—机械设计及理论] TH117