QRJ-150型空压机曲轴断裂失效分析与结构改进

发布时间：2018-01-18 14:05

本文关键词：QRJ-150型空压机曲轴断裂失效分析与结构改进　出处：《南京航空航天大学》2014年硕士论文　论文类型：学位论文

【摘要】：空气压缩机作为“通用机械”被广泛应用在国民经济和国防建设当中，尤其是微型高压空气压缩机更是飞机、坦克、轮船的气动操纵系统不可或缺的核心部件。一段时间以来，中航工业宏光空降装备有限公司发现他们使用的QRJ-150和KY-8等相近型号的其他高压活塞式空气压缩机在使用过程中经常发生曲轴花键轴断裂失效的现象，为了找出曲轴花键轴断裂的原因并提出其解决方案，，提出了本课题。本课题就以QRJ-150型空压机为基础，结合空压机理论，对断裂曲轴有关部件借助于有限元分析软件进行了曲轴的静强度疲劳分析、模态分析和花键轴的静强度疲劳分析。综合分析有限元分析结果和实际断裂情况，论文提出了以渐开线花键轴取代原矩形花键轴来解决曲轴断裂失效的改进方案，并用有限元分析证明了方案的可行性,从理论上解决了曲轴花键轴断裂的问题。主要研究工作为： 1.应用UG软件对QRJ-150型高压活塞式空气压缩机进行三维建模和运动仿真，将分析结果与理论计算值作了比较; 2.通过ANSYS workbench软件对曲轴进行静力学分析和模态分析，完成静强度、疲劳强度的校核; 3.分别对原花键轴、偏心花键轴和渐开线花键轴进行了有限元静强度疲劳分析，提出了以渐开线花键轴取代原矩形花键轴的改进方案。
[Abstract]:Air compressor as a "general machinery" is widely used in the national economy and national defense construction, especially the miniature high-pressure air compressor is aircraft, tanks. The essential core of a ship's pneumatic control system. For some time. AVIC Industrial Hongguang Airborne equipment Co., Ltd. has found that other high-pressure piston air compressors of similar models such as QRJ-150 and KY-8 often occur crankshaft spline shaft fracture failure in the process of operation. The phenomenon. In order to find out the reason of the fracture of the crankshaft spline shaft and put forward its solution, this paper puts forward the subject. Based on QRJ-150 type air compressor and combined with the theory of air compressor, the static strength fatigue analysis of crankshaft is carried out by means of finite element analysis software. Modal analysis and static strength fatigue analysis of spline shaft. In this paper, an improved scheme of replacing the original rectangular spline shaft with involute spline shaft to solve the fracture failure of crankshaft is proposed, and the feasibility of the scheme is proved by finite element analysis. The fracture of crankshaft spline shaft is solved theoretically. The main research work is: 1. Three-dimensional modeling and motion simulation of QRJ-150 type high-pressure piston air compressor are carried out by using UG software, and the analysis results are compared with the theoretical calculation value. 2. The static analysis and modal analysis of crankshaft are carried out by ANSYS workbench software to check the static strength and fatigue strength; 3. The finite element static strength fatigue analysis of the original spline shaft, eccentric spline shaft and involute spline shaft is carried out, and an improved scheme of replacing the original rectangular spline shaft with involute spline shaft is put forward.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH45

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