旋转机械无试重现场动平衡原理与应用

王维民;高金吉;江志农;李 燕

振动与冲击 ›› 2010, Vol. 29 ›› Issue (2) : 212-215.

PDF(1918 KB)
PDF(1918 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (2) : 212-215.
论文

旋转机械无试重现场动平衡原理与应用

  • 王维民;高金吉;江志农;李 燕
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Principle and Application of Rotating Machines No Trial Weight Field Balancing Strategy

  • Wang Weimin;Gao Jinji;Jiang Zhinong;Liyan
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摘要

提出了一种高效的无试重现场动平衡原理与方法,并进行了实验验证及现场应用研究。无试重平衡的基本原理是通过数值模拟的方法,通过在平衡平面上施加虚拟不平衡量,确定转子在轴承处的振动相位相对于平衡平面处的激振力的相位的滞后角。这种滞后可以借助不断完善的转子动力学理论以及有限元数值模拟方法进行确定,其关键是确定轴承的刚度和阻尼系数。滞后角和振动的相位相加便为激振力的相位,将该相位反相可得到配重的相位。配重量由测量得到的振幅和计算得到的振幅之间的比例关系以及虚拟不平衡量的大小确定。实验研究以及现场的平衡实践表明,该方法可以在不加试重的情况下,实现对转子的有效平衡,从而降低机组的现场动平衡的时间和成本。

Abstract

A field balancing strategy without trail weight as well as the result of experiment and field application was presented in this paper. Essentially the strategy utilizes the development of rotating machine dynamics to determine the delay angle between vibration at bearings and exciting force on rotor. Key point of the strategy is confirming the coefficient of the bearings stiffness and damping. Modern perfect Finite Elements Method(FEM) can be used to solve this problems. Theoretical analysis shown that the phase of trial weight equal to the summation of vibration phase and delay angle and 1800 . The quantity of trial weight can be obtained by the liner scaling between vibration amplitude of measured and simulated. Result of experimental research and field application indicate that this strategy can balancing rotating machines efficiently, consequently reducing the time and cost of the balancing considerably.

关键词

旋转机械 / 现场动平衡 / 转子动力学 / 轴承参数

Key words

rotating machine / field balancing / rotor dynamics / bearings parameter

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王维民;高金吉;江志农;李 燕. 旋转机械无试重现场动平衡原理与应用[J]. 振动与冲击, 2010, 29(2): 212-215
Wang Weimin;Gao Jinji;Jiang Zhinong;Liyan. Principle and Application of Rotating Machines No Trial Weight Field Balancing Strategy[J]. Journal of Vibration and Shock, 2010, 29(2): 212-215

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