發(fā)布時間：2018-06-08 13:11

  本文選題：風電發(fā)電機 + 行星減速器��； 參考：《大連交通大學》2012年碩士論文

【摘要】：變距驅(qū)動減速器作為大功率風力發(fā)電系統(tǒng)的關(guān)鍵部件之一,它的承載能力、機械性能、動力學性能及無維修壽命的可靠性,都是影響整個風力發(fā)電系統(tǒng)是否正常工作的關(guān)鍵因素。在現(xiàn)代的機械設(shè)計中動力學特性已經(jīng)成為一個不可或缺的重要環(huán)節(jié),因此,有必要對該兩級二齒差針擺行星減速器動力學性能進行深入研究。本課題來源于國家自然基金項目(54075049),該兩級二齒差針擺行星減速器的動力學特性研究是本課題的重要組成部分,本文基于虛擬樣機技術(shù)及有限元分析理論做了如下工作： (1)利用實體建模軟件Pro/E建立了兩級二齒差針擺行星減速器系統(tǒng)的裝配樣機模型,并進行了裝配分析和干涉檢驗,未得到發(fā)生干涉的零件,從而驗證了裝配模型的正確性。利用Mech/Pro接口軟件完成剛體的定義、約束副的施加等,為將模型導入ADAMS中做準備。 (2)在ADAMS中建立了減速器傳動機構(gòu)的多剛體動力學仿真模型,并對其進行了仿真分析。包括工作環(huán)境的設(shè)置及接觸力的添加等分析前期工作；各個傳動部件的角速度分析,與理論計算對比驗證模型的正確性；角加速度仿真曲線時域和頻域分析,得到擺線輪及其他主要傳動部件在減速器運轉(zhuǎn)時的主要振動頻率點；擺線輪與針齒和柱銷嚙合力分析,從而對減速器均載性能分析。將仿真結(jié)果與理論計算值進行比較,數(shù)據(jù)較吻合,說明提出的擺線針輪減速機虛擬樣機建模正確,有較好的可靠性和實用價值。 (3)在完成減速器實體模型的基礎(chǔ)上,采用ANSYS有限元分析軟件,對主要傳動部件進行模態(tài)分析,如擺線輪,中間軸等。由于在實際工程中低階模態(tài)更具重要意義,所以分析結(jié)果計算前十階固有振動頻率,并與仿真結(jié)果進行比較分析得到易發(fā)生共振的危險頻率點。對減速器傳遞扭矩的核心部件——擺線輪,進行承載有限元結(jié)構(gòu)靜力學分析,得出各級擺線輪負載時的位移變形圖、應(yīng)力分布圖,分析應(yīng)力最大值及位置、變形最大值及位置。 虛擬樣機技術(shù)為機械設(shè)計過程提供了虛擬試驗平臺,運用該技術(shù)進行動力學分析為物理樣機的制造和測試提供了必要的數(shù)據(jù)和分析的基礎(chǔ),為結(jié)構(gòu)和性能優(yōu)化、振動和噪聲及壽命的分析提供了重要的依據(jù),因此具有重要的理論意義和現(xiàn)實意義。
[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.
【學位授予單位】：大連交通大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TM315;TH132.46

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本文編號：1995902