倾斜安装工况电机-基础系统螺栓松动振动响应特性研究

发布时间：2019-03-22 15:39

【摘要】：针对倾斜安装工况下电机基础螺栓松动振动特性复杂且难以诊断分析问题,开展倾斜安装工况电机基础螺栓松动振动特性研究。通过以电机-基础系统为研究对象,研究基础螺栓松动特性与振动响应之间的内在关系,仿真分析螺栓连接刚度、阻尼特性对电机基础振动特性的影响,分别开展倾斜和水平两种工况下电机基础连接的单、双螺栓松动振动测试,并对振动响应信号进行分析,揭示螺栓松动对电机-基础系统振动响应特性的影响规律。本文主要内容如下:1)分别介绍了电机振动特性和螺栓松动特性方面的研究现状。以电机-基础系统为研究对象,推导了含螺栓连接特性参数的电机-基础系统动力学方程,研究基础螺栓松动特性与振动响应之间的内在关系,以美国Spectra Quest公司生产模拟故障实验的电机为研究对象,建立倾斜5°安装工况下电机基础系统三维模型。仿真分析电机基础螺栓连接刚度、阻尼变化对电机基础系统振动响应特性影响变化规律。2)搭建出倾斜5°安装工况电机-基础系统实验台。分别开展倾斜安装工况下单、双螺栓不同松动程度下振动响应测试,通过对测试采集数据进行计算分析,揭示倾斜安装工况下电机基础振动响应随基础螺栓松动变化规律,并从电机与基础结合面的刚度、阻尼特性角度对螺栓松动振动响应变化现象进行了解释和说明。3)为对比分析倾斜安装工况下的振动响应规律,构建水平电机-基础系统实验台。开展水平安装工况电机基础连接螺栓松动进行振动测试,对测试采集数据进行计算分析,获得水平安装工况下电机基础振动响应随基础螺栓松动变化规律,与倾斜安装工况下电机基础螺栓松动振动变化结论进行对比。研究结论可为电机等机械螺栓松动故障诊断和运行维护提供指导。
[Abstract]:In view of the complicated and difficult diagnosis and analysis of the loosening vibration characteristics of the motor foundation bolt under the inclined installation condition, the research on the loose vibration characteristic of the motor foundation bolt under the inclined installation condition is carried out. By taking the motor-foundation system as the research object, the relationship between the loosening characteristic of the foundation bolt and the vibration response is studied, and the influence of the stiffness and damping characteristic of the bolt connection on the vibration characteristic of the motor foundation is simulated and analyzed. The single and double bolt loosening vibration tests of the motor foundation connection under inclined and horizontal conditions are carried out, and the vibration response signals are analyzed to reveal the influence of bolt loosening on the vibration response characteristics of the motor-foundation system. The main contents of this paper are as follows: 1) the research status of motor vibration characteristics and bolt loosening characteristics are introduced respectively. Taking the motor-foundation system as the research object, the dynamic equation of the motor-foundation system with the characteristic parameters of bolted connection is derived, and the inherent relationship between the loosening characteristic of the foundation bolt and the vibration response is studied. The three-dimensional model of the motor foundation system under the inclined 5 掳installation condition is established by taking the motor produced by Spectra Quest Company in the United States as the research object. The influence of bolt connection stiffness and damping on the vibration response of the motor foundation system is simulated and analyzed. 2) the motor-foundation system experimental platform is set up under the condition of inclined 5 掳installation. The vibration response test under different loosening degree of double bolts is carried out separately under inclined installation condition. Through the calculation and analysis of test data, the change rule of vibration response of motor foundation with the loosening of foundation bolt under inclined installation condition is revealed, and the vibration response of motor foundation under inclined installation condition is analyzed by calculation and analysis. The variation of bolt loosening vibration response is explained and explained from the angle of stiffness and damping characteristics of motor and foundation interface. 3) the vibration response law under inclined installation is compared and analyzed, and the vibration response of bolt loosening is explained and explained from the angle of stiffness and damping characteristics of motor and foundation. Construction of horizontal motor-basic system experimental platform. The vibration test is carried out for the loosening of the connection bolt of the motor foundation under the horizontal installation condition. The vibration response of the motor foundation with the loosening of the foundation bolt under the horizontal installation condition is obtained by calculating and analyzing the data collected from the test. The results are compared with the results of loosening vibration of motor foundation bolt under inclined installation condition. The research conclusion can provide guidance for the fault diagnosis and operation maintenance of mechanical bolt loosening.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM343.2

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