基于紧固过程的航发低压转子连接螺栓组螺栓装配预紧力分析  

Analysis of Bolt Assembly Pre-tightening Force for Connection Bolt Group of Aero-operated Low Pressure Rotor Based on Fastening Process

作　　者：张永 Zhang Yong(Zhong Harbin Dongan Engine Co.,Ltd.,Harbin,China)

机构地区：[1]中国航发哈尔滨东安发动机有限公司,黑龙江哈尔滨

出　　处：《科学技术创新》2024年第10期40-43,共4页Scientific and Technological Innovation

摘　　要：本文探究了低压转子连接螺栓组螺栓装配预紧力的确定方法。通过设计螺栓短期松弛实验,确定了螺栓预紧力的拟合函数,计算出螺栓的初始预紧力为37800 N,松弛后稳定的预紧力为37000 N。随后基于弹性相互作用原理,分别设计了低压转子环形试件的弹性正作用实验和扇形试件的弹性负作用实验。结果表明,弹性正作用对拧紧工艺无影响,弹性负作用会导致相邻螺栓之间的预紧力出现不同程度的减小。在实验基础上提出了两轮顺序装配工艺,将装配预紧力设定为37000 N,可以忽略拧紧工艺对螺栓预紧力的影响,使螺栓组螺栓的分散性最低,从而保证了低压转子的可靠性与稳定性。In this paper,the determination method of bolt assembly preload for low pressure rotor connection bolt group is studied.By designing bolt short-term relaxation experiment,the fitting function of bolt preload is determined.The initial preload of bolt is 37800 N,and the stable preload after relaxation is 37000 N.Then,based on the principle of elastic interaction,the positive and negative elastic experiments of annular and sector specimens of low pressure rotor are designed respectively.The results show that the positive elastic action has no effect on the tightening process,and the negative elastic action will cause the preload between adjacent bolts to decrease to different degrees.Based on the experiment,a two-wheel sequential assembly process was proposed,and the preloading force was set to 37000 N,which could ignore the influence of tightening process on the preloading force of bolts,and minimize the dispersion of bolts in the bolt group,thus ensuring the reliability and stability of the low-pressure rotor.

关 键 词：低压转子 连接螺栓 预紧力 弹性负作用 

分 类 号：V262.41[航空宇航科学与技术—航空宇航制造工程]