微速差双转子系统高精度动平衡关键技术研究

发布时间：2018-05-04 20:28

本文选题：全矢动平衡 + 影响系数法　；参考：《郑州大学》2014年硕士论文

【摘要】：随着现代工业对高效率、高精度和自动化生产的要求越来越高，作为大型旋转机械核心部件的转子系统，其动平衡问题越发引起人们的重视，而微速差双转子系统的动平衡正是其中重要的一部分。针对传统单通道信息在转子动平衡问题上的诸多弊端，本文采用了将全矢谱技术与传统影响系数法相结合的全矢动平衡方法来解决。以多氟多公司的两台卧螺离心机作为试验平台，利用全矢动平衡方法来进行动平衡，然后将平衡效果与传统影响系数法相对比，证明了全矢动平衡方法在微速差双转子系统的平衡上精度高。主要研究工作有： 1、从单元盘转子系统存在质量偏心的问题入手，分析了不平衡故障机理，研究了不平衡故障类型、危害以及产生的原因，为动平衡理论分析和全矢谱参数间的联系奠定基础。 2、对刚性转子、挠性转子影响系数法进行了分析，通过研究单通道信息的影响系数法，指出其在解决转子不平衡问题上的弊端，，由此引出全矢谱技术，进而提出了基于此技术的高精度全矢动平衡方法（FVDB），然后通过从Bently转子实验台得到的实验数据证明了全矢动平衡方法的优越性；针对不平衡响应算法的繁杂性，介绍了简易算法，优化了计算过程，提高了动平衡效率。 3、以微速差双转子系统中有代表性的卧螺离心机为具体对象，对其结构和工作原理作了分析。在现场离心机设备为平台的条件下，采用PDES-E仪器作为信号采集和分析的试验工具，利用全矢动平衡方法对两台卧螺离心机进行了平衡校正，并将平衡结果与传统单通道影响系数法进行对比，证明了全矢动平衡方法在解决微速差双转子系统不平衡问题上具有可行性和优越性。
[Abstract]:With the increasing demands of modern industry for high efficiency, high precision and automatic production, the rotor system, which is the core component of large rotating machinery, has attracted more and more attention. The dynamic balance of the two-rotor system with micro-speed difference is an important part of it. In view of the disadvantages of traditional single-channel information in rotor dynamic balancing, the full vector balancing method which combines the whole vector spectrum technique with the traditional influence coefficient method is used to solve the problem. In this paper, two horizontal centrifuges of polyfluorocarbon company were used as the test platform, and the balance effect was compared with the traditional influence coefficient method by using the full-vector balancing method. It is proved that the full vector balancing method has high accuracy on the balance of a two-rotor system with micro-velocity difference. The main research work is: 1. Starting with the problem of mass eccentricity in the unit disk rotation subsystem, the mechanism of unbalanced fault is analyzed, and the types, hazards and causes of the unbalanced fault are studied, which lays a foundation for the dynamic balance theory analysis and the relationship between the full vector spectrum parameters. 2. The influence coefficient method of rigid rotor and flexible rotor is analyzed. By studying the influence coefficient method of single channel information, the disadvantages of the method in solving rotor unbalance are pointed out, and the full vector spectrum technique is introduced. Then, a high-precision full-vector balancing method based on this technique is proposed, and then the superiority of the full-vector balancing method is proved by the experimental data obtained from the Bently rotor test bench, and the simple algorithm is introduced in view of the complexity of the unbalanced response algorithm. The calculation process is optimized and the dynamic balance efficiency is improved. 3. The structure and working principle of the typical horizontal spiral centrifuge in the double rotor system with different velocities are analyzed. Under the condition that the field centrifuge equipment is used as the platform, the PDES-E instrument is used as the test tool for signal acquisition and analysis, and the balance correction of the two horizontal centrifuges is carried out by using the full-vector dynamic balance method. By comparing the results with the traditional single-channel influence coefficient method, it is proved that the full-vector balancing method is feasible and superior in solving the unbalance problem of two-rotor system with micro-velocity difference.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH113.25

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