高可靠性大功率风电机变桨距减速器仿真分析

发布时间：2018-06-08 13:11

本文选题：风电发电机 + 行星减速器　；参考：《大连交通大学》2012年硕士论文

【摘要】：变距驱动减速器作为大功率风力发电系统的关键部件之一,它的承载能力、机械性能、动力学性能及无维修寿命的可靠性,都是影响整个风力发电系统是否正常工作的关键因素。在现代的机械设计中动力学特性已经成为一个不可或缺的重要环节,因此,有必要对该两级二齿差针摆行星减速器动力学性能进行深入研究。本课题来源于国家自然基金项目(54075049),该两级二齿差针摆行星减速器的动力学特性研究是本课题的重要组成部分,本文基于虚拟样机技术及有限元分析理论做了如下工作： (1)利用实体建模软件Pro/E建立了两级二齿差针摆行星减速器系统的装配样机模型,并进行了装配分析和干涉检验,未得到发生干涉的零件,从而验证了装配模型的正确性。利用Mech/Pro接口软件完成刚体的定义、约束副的施加等,为将模型导入ADAMS中做准备。 (2)在ADAMS中建立了减速器传动机构的多刚体动力学仿真模型,并对其进行了仿真分析。包括工作环境的设置及接触力的添加等分析前期工作；各个传动部件的角速度分析,与理论计算对比验证模型的正确性；角加速度仿真曲线时域和频域分析,得到摆线轮及其他主要传动部件在减速器运转时的主要振动频率点；摆线轮与针齿和柱销啮合力分析,从而对减速器均载性能分析。将仿真结果与理论计算值进行比较,数据较吻合,说明提出的摆线针轮减速机虚拟样机建模正确,有较好的可靠性和实用价值。 (3)在完成减速器实体模型的基础上,采用ANSYS有限元分析软件,对主要传动部件进行模态分析,如摆线轮,中间轴等。由于在实际工程中低阶模态更具重要意义,所以分析结果计算前十阶固有振动频率,并与仿真结果进行比较分析得到易发生共振的危险频率点。对减速器传递扭矩的核心部件——摆线轮,进行承载有限元结构静力学分析,得出各级摆线轮负载时的位移变形图、应力分布图,分析应力最大值及位置、变形最大值及位置。虚拟样机技术为机械设计过程提供了虚拟试验平台,运用该技术进行动力学分析为物理样机的制造和测试提供了必要的数据和分析的基础,为结构和性能优化、振动和噪声及寿命的分析提供了重要的依据,因此具有重要的理论意义和现实意义。
[Abstract]:Variable pitch drive reducer is one of the key components of high power wind power generation system. Its bearing capacity, mechanical performance, dynamic performance and reliability of no maintenance life. All are the key factors that affect the normal operation of the whole wind power system. Dynamic characteristics have become an indispensable and important part in modern mechanical design. Therefore, it is necessary to deeply study the dynamic performance of the two-stage two-tooth differential planetary reducer. This subject comes from the National Fund for Nature Project No. 540750490.The study on the dynamic characteristics of the two-stage two-tooth differential planetary reducer is an important part of this project. Based on virtual prototyping technology and finite element analysis theory, the following works are done in this paper: (1) the assembly prototype model of two-stage two-tooth differential planetary reducer system is established by using the solid modeling software Prop / E, and the assembly analysis and interference test are carried out. No interference parts were obtained, which verified the correctness of the assembly model. The definition of rigid body and the application of constraint pair are completed by using Mech-Pro interface software. In order to import the model into Adams, the multi-rigid-body dynamics simulation model of reducer transmission mechanism is established in Adams, and the simulation analysis is carried out. It includes working environment setting and contact force adding and so on. The angular velocity analysis of each transmission component is compared with the theoretical calculation to verify the correctness of the model. The angular acceleration simulation curve is analyzed in time domain and frequency domain. The main vibration frequency points of cycloid wheel and other main transmission parts in the operation of reducer and the meshing force of cycloid wheel with pin and pin are obtained, and the average load performance of reducer is analyzed. By comparing the simulation results with the theoretical calculation values, the data are in good agreement, which shows that the proposed virtual prototype of cycloid pin reducer is correct in modeling, and has good reliability and practical value. 3) on the basis of completing the solid model of reducer, The modal analysis of main transmission parts, such as cycloid wheel, intermediate shaft and so on, is carried out by ANSYS finite element analysis software. Because the low-order modes are more important in practical engineering, the first ten natural vibration frequencies are calculated and compared with the simulation results, the dangerous frequency points which are prone to resonance are obtained. The hydrostatic analysis of cycloidal wheel, the core component of transmission torque of reducer, is carried out, and the displacement deformation diagram, stress distribution diagram, maximum stress and position are obtained when the cycloid wheel is loaded at all levels. The virtual prototyping technology provides a virtual test platform for the mechanical design process and provides the necessary data and analysis basis for the manufacture and testing of the physical prototype by using the technology for dynamic analysis. It provides an important basis for the analysis of structure and performance optimization, vibration and noise, and life, so it has important theoretical and practical significance.
【学位授予单位】：大连交通大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TM315;TH132.46

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