一种转子空间弯曲轴线的测试方法及试验验证  

A test method of rotor space bending axis and its test verification

作　　者：宋培培 陈果[1] 董超 屈美娇 

机构地区：[1]南京航空航天大学民航学院,南京210016 [2]中国航空发动机集团有限公司沈阳发动机研究所,沈阳110015

出　　处：《航空动力学报》2017年第9期2219-2229,共11页Journal of Aerospace Power

基　　金：国家基础研究项目(613139);国家自然科学基金(61179057)

摘　　要：提出了一种转子空间弯曲轴线的测试技术。针对某实际弯曲转子,首先,利用电涡流位移传感器测量转子不同截面的弯曲向量,得到了在同一绝对坐标下的各截面形心相对于旋转中心的弯曲向量;然后,应用三次样条函数拟合了转子的空间几何中心线,再利用Visual C++编程调用OPENGL图形函数,对弯曲转子进行了三维实体显示;最后利用百分表测量法和所提方法进行了对比试验。结果表明:所提方法测得的弯曲转子各截面轴心轨迹与百分表测得的各截面轴心轨迹基本一致,拟合圆结果也基本重合,其中截面1、截面6的拟合圆结果虽有轻微误差,但误差在可允许范围以内,由此验证了该方法的准确性和可行性。A test method of rotor space bending axis was put forward. Firstly, for a practical bended rotor, the bending of each section centroid relative to the rotation center can be obtained by using the eddy current displacement sensors, and the bending degree of differ- ent sections of the rotor can be obtained in the same absolute coordinate system. Secondly, the cubic spline function was applied to fit the space geometry center line of rotor, and the three-dimensional solid models of the bended rotor were shown by using the OPENGL graph- ics function, which was called by the Visual C＋＋. Finally, the traditional means of meas- urement based on the dial indicator were employed to verify the proposed method. The results indicated that, the shaft orbit of each section except for section 1 and section 6 meas- ured by the proposed method were consistent with the shaft orbit of the dial indicator, and circle fitting results were also basically coincident. What＇s more, the error range of the circle fitting of section 1 and section 6 were in reasonable agreement. Thus the method is available to investigate the migration.

关 键 词：转子弯曲 样条函数 电涡流位移传感器 百分表 计算机图形学 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]