• CN:11-2187/TH
  • ISSN:0577-6686

›› 2006, Vol. 42 ›› Issue (12): 132-136.

• 论文 • 上一篇    下一篇

激光测量大型转轴动载波动系数原理

时培明;刘彬;赵武; 韩东颖;蒋金水   

  1. 燕山大学信息科学与工程学院;燕山大学机械工程学院;中国第一重型机械集团公司大连设计研究院
  • 发布日期:2006-12-15

PRINCIPLE OF DYNAMIC LOAD FLUCTUATION COEFFICIENT MEASUREMENT FOR LARGE ROTATING SHAFT USING LASER TECHNOLOGY

SHI Peiming;LIU Bin;ZHAO Wu;HAN Dongying;JIANG Jinshui   

  1. College of Information Science and Engineering, Yanshan University College of Mechanical Engineering, Yanshan University Design and Research Institute, China First Heavy Industries
  • Published:2006-12-15

摘要: 为能够对大型复杂旋转机械转轴动态载荷特性进行在线监测,给出一个表征转轴动载特性的参量——动载波动系数KID。应用动力学理论推导出动载波动系数KID测量模型的数学表达式,该式表明测得转轴转速波动值即可求得KID值。基于激光多普勒技术,提出一种直接提取动载波动系数KID的激光测量方法。通过构造光学测试系统测量相邻时刻转轴轴段两端面的瞬态转速,得到轴段转速波动值及两端面相对转速波动值,代入KID测量模型,能够直接得到动载波动系数KID值,从而实现对转轴扭振强度的实时监测。通过试验验证了该方法的可行性,结果表明,动载波动系数KID较好地反映了转轴的动态载荷波动特性,能为工程中大型复杂旋转机械转轴动态扭振监测提供新方法。

关键词: 动载波动系数KID, 激光测量, 扭振, 旋转机械, 转轴

Abstract: In order to monitor the dynamic load characteristic of rotating shaft of large-scale rotary machine, a new measured parameter—dynamic load fluctuation coefficient KID is presented. The mathematical model of KID measurement method is deduced by utilizing the principle of dynamics. Based on laser Doppler technology, a novel approach to KID measurement is proposed. Speed fluctuation values of rotating shaft segment and relative speed fluctuation values of between sections are obtained directly by measuring instantaneous rotational velocity of double sections in two successive times by designed optical measurement system, and then the values of KID are obtained by submitting the values of speed fluctuation into the measurement model. The feasibility is validated by experimentation. Experi-mental results indicate that dynamic load fluctuation coefficient KID reflects accurately the dynamic load fluctuation characteris-tic of rotating shaft. The technique provides a new means for monitoring dynamic load characteristic of large-scale rotating machine in engineering.

Key words: Dynamic load fluctuation coefficient KID, Laser measurement, Rotary machine, Rotating shaft, Torsional vibration

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