具有初始弯曲转子系统的动平衡方法研究

发布时间：2018-01-28 12:46

本文关键词： 初始弯曲转子系统动平衡　出处：《浙江大学》2011年硕士论文　论文类型：学位论文

【摘要】：目前,高速旋转机械已经越来越广泛的使用于国民生产的各个部门,成为其中的重要关键设备,而转子系统则是高速旋转机械中的核心组成部分。转子在运行过程中,由于各种原因导致其中心惯性主轴偏离了旋转轴,从而产生了不平衡,这种不平衡状态会严重影响转子的正常运行,甚至对相关设备造成损坏。导致转子系统产生不平衡的原因有很多,对于其过大的工频振动方面,主要是由转子质量偏心和初始弯曲引起的。对于前者已有较为成熟的动平衡方法,但长期水平搁置或者环境温度的不均匀都会导致转子产生一定程度的初始弯曲,对于此类具有初始弯曲的转子系统,采用传统的动平衡方法已经不能很好的解决其在运行过程中不平衡振动过大的问题,故本文所研究的针对具有初始弯曲转子系统的动平衡方法对于解决此类问题有很大的帮助,这在实际的工程应用中也是具有非常广阔的前景的。本文首先建立了具有初始弯曲转子系统的数学模型,再通过相关具体计算得出具有初始弯曲转子系统一般性的振动响应特征,然后根据这些特征提出了一种基于模态平衡的单平面加校正量的动平衡方法,用于平衡具有初始弯曲的转子系统,经过仿真计算证明该方法是正确、有效的；接着本文又研究出了一种一次试重在线识别初始弯曲的方法,这种方法在实验或实际工程中对转子系统进行初始弯曲的识别是非常简便和有效的；最后本文通过对具有初始弯曲的真实转子系统进行动平衡实验,采用提出的转子系统初始弯曲的识别方法成功识别出了该实验转子系统的初始弯曲,进而又根据提出的针对具有初始弯曲转子系统的动平衡方法对该实验转子系统进行动平衡,成功验证出该方法在实际的实验中确实能够起到较好的平衡转子系统初始弯曲的效果,从而证明出该动平衡方法在实际工程的应用中是可行的。总之,本文主要研究具有初始弯曲的转子系统,关键是提出了一种针对具有初始弯曲转子系统的动平衡方法,该方法在理论研究和实验测试中都被证明是正确、有效和可行的,因此该方法的提出对于实际工程中的应用具有一定的启发意义。
[Abstract]:At present, high-speed rotating machinery has been more and more widely used in Yu Guomin production of various departments, which has become an important key equipment. The rotor system is the core part of the high-speed rotating machinery. During the operation of the rotor, the central inertial spindle deviates from the axis of rotation due to various reasons, resulting in imbalance. This unbalanced state will seriously affect the normal operation of the rotor, and even cause damage to the relevant equipment. There are many reasons leading to the imbalance of the rotor system, for its excessive power frequency vibration. It is mainly caused by mass eccentricity and initial bending of the rotor. For the former, a more mature dynamic balancing method has been developed. However, long-term horizontal shelving or environmental temperature inhomogeneity will lead to a certain degree of initial bending of the rotor, for this kind of rotor system with initial bending. The traditional dynamic balancing method can not solve the problem of excessive unbalanced vibration in the process of operation. Therefore, the dynamic balancing method studied in this paper for the rotor system with initial bending is of great help to solve this kind of problem, which has a very broad prospect in practical engineering application. In this paper, the mathematical model of the rotor system with initial bending is first established, and then the general vibration response characteristics of the rotor system with initial bending are obtained by relevant calculation. Then, according to these characteristics, a dynamic balancing method based on modal balance is proposed, which is used to balance rotor system with initial bending. The simulation results show that the method is correct and effective. Then a method to identify the initial bending of the rotor system is developed in this paper. The method is very simple and effective in the experiment or practical engineering. Finally, through the dynamic balance experiment of the real rotor system with initial bending, the initial bending of the experimental rotor system is successfully identified by the proposed method of identifying the initial bending of the rotor system. Then the dynamic balance of the experimental rotor system is carried out according to the proposed dynamic balancing method for the rotor system with initial bending. It is successfully verified that this method can effectively balance the initial bending of rotor system in practical experiments, and it is proved that the dynamic balancing method is feasible in practical engineering. In conclusion, this paper mainly studies the rotor system with initial bending, the key is to propose a dynamic balancing method for the rotor system with initial bending. The method has been proved to be correct, effective and feasible in both theoretical research and experimental test.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH113

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