基于减振垫动力特性的电动机减振技术研究

发布时间：2018-04-27 09:43

本文选题：电动机减振 + 参数优化　；参考：《湖南科技大学》2014年硕士论文

【摘要】：弹性支撑对于工作在特殊环境下的旋转机械具有重要的作用，较为突出的代表是风力发电机与海上钻井平台，由于其工作环境的限制，需要通过弹性支撑减小外界引起的振动，，避免事故的发生。基于此本文以电动机为研究对象，对弹性支撑减振参数进行优化，提供了一种系统的分析方法。本文研究内容有以下几个方面： (1)基于减振垫的工作原理及其动力学特性，对减振垫设计的步骤做出了详细的说明，通过理论上的计算方法，计算出不同的减振效率需要的减振垫的刚度大小，得到对应的刚度值，从而推导出减振垫弹性模量大小，并为后续仿真实验奠定了基础。 (2)对电动机三维模型进行了建模分析，建立了不同网格质量的有限元模型。对比不同网格质量对模态的影响，采用中等质量的网格划分方法能够得到和采用高等质量网格相同的效果，并且所采用的仿真时间减少，能够降低时间成本，以此分别对电动机转子、定子、电动机整体模态进行分析，得到电动机各部件及整体的振动情况。 (3)首先对电动机-减振垫系统进行动力学分析，得到减振垫不同刚度值对电动机-减振垫系统整体固有频率的影响；然后对多体动力学软件进行了简单的介绍，列举常见的多体动力学软件及其特点，使用ADAMS可以自动对每一个减振参数进行设定，得到电动机-减振垫系统加速度有效值，能够快速找到在电动机工作转速条件下使用减振垫的最优刚度范围。 (4)通过得到的减振垫刚度优化参数范围选取减振垫进行实验，验证了在转速频率为30HZ的情况下，添加优化得到的减振刚度对电动机整体的振动有所降低，并得到了电动机在不同的工作转速下，需要添加不同的减振垫以达到减振效果的结论。
[Abstract]:Elastic bracing plays an important role in rotating machinery working in special environment. The outstanding representative is wind turbine and offshore drilling platform. Due to the limitation of its working environment, it is necessary to reduce the vibration caused by the outside through elastic support. Avoid an accident. Based on this, this paper takes the motor as the research object, optimizes the vibration absorption parameters of elastic braces, and provides a systematic analysis method. The contents of this paper are as follows: 1) based on the working principle and dynamic characteristics of the damping pad, the design steps of the damping pad are explained in detail. Through the theoretical calculation method, the stiffness of the damping pad required by different damping efficiency is calculated. The corresponding stiffness value is obtained, and the elastic modulus of the damping pad is deduced, which lays a foundation for the subsequent simulation experiment. 2) the 3D model of motor is modeled and analyzed, and the finite element model with different mesh quality is established. Compared with the effect of different mesh quality on the modal, the meshing method with medium quality can achieve the same effect as the high quality mesh, and the simulation time is reduced, and the time cost can be reduced. The rotor, stator and overall mode of the motor are analyzed, and the vibration of the components and the whole of the motor are obtained. Firstly, the dynamic analysis of the motor-damping cushion system is carried out, and the influence of the different stiffness values of the damping pad on the whole natural frequency of the motor-damping pad system is obtained, and then the multi-body dynamic software is introduced briefly. The common multi-body dynamics software and its characteristics are listed. Each damping parameter can be set automatically by using ADAMS, and the effective acceleration value of the motor damping pad system can be obtained. The optimal stiffness range of the damping pad can be found quickly under the working speed of the motor. 4) through the experiment of selecting the optimum parameter range of the stiffness of the damping pad, it is verified that when the rotational speed frequency is 30HZ, the damping stiffness obtained by adding the optimized damping stiffness can reduce the whole vibration of the motor. At the same time, it is concluded that different damping pads should be added to the motor at different working speeds to achieve the effect of vibration reduction.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB535.1

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