基于非对称齿行星传动的风电齿轮箱研究

发布时间：2018-05-10 05:55

本文选题：风电齿轮箱 + 行星传动　；参考：《山东大学》2014年硕士论文

【摘要】：随着风力发电技术的发展,大功率风力发电机的设计越来越受到青睐。风电齿轮箱作为风力发电机的核心部件,其行星传动结构的设计尤为重要。目前风电齿轮箱中的行星传动结构大多为满足2-3MW的结构,距离实现国家“十二五”规划在大功率风电设备设计制造方面的规划目标：突破10MW级海上风电机组整机和零部件设计有很大距离。同时应用在齿轮箱中的齿轮存在着振动噪声大、受力变形大以及重量大等缺点,而且齿轮参数不一定是行星传动中最优的参数,也没有对传动结构进行参数化建模装配。针对以上出现的问题,本文通过对非对称渐开线齿轮的设计理论、风电齿轮箱行星传动结构设计以及参数优化等知识的研究,基于理论分析及有限元分析,对非对称齿应用于风电齿轮箱行星传动进行了深入分析,主要工作如下：确定风电齿轮箱行星传动的主要设计参数,通过对功率分流型、串联传动、普通行星传动三种传动结构的预设计,对比它们的传动效率及重量,确定了设计结构紧凑、效率高、功重比高、承载能力强10MW的功率分流型行星传动结构。在风电齿轮箱行星齿轮设计中,引进了一种新型的非对称渐开线齿轮,该新型齿轮能够提高承载能力、改善齿面润滑情况,减少齿轮的重量和尺寸,降低齿轮的振动和噪声。本文在研究非对称渐开线齿轮形成原理的基础上,基于PROE对非对称渐开线齿轮进行了参数化建模,同时,对基于非对称齿行星传动齿轮箱进行了参数化装配。在参数化模型的基础上,基于ANSYS WORKBENCH对非对称齿风电齿轮箱各接触齿对进行了接触应力和弯曲应力有限元分析,与理论分析应力值进行了对比研究,验证了限元分析计算的正确性,并进一步对比研究了非对称齿和对称齿风电齿轮箱的承载能力,得出了采用非对称齿的风电齿轮箱行星传动可以大大改善传动效果。为寻找出最优的非对称齿形角,以非对称齿风电齿轮箱最大等效应力为优化目标,非对称齿形角为设计变量,利用离散参数优化的方法对风电齿轮箱进行了优化获得了最优的非对称齿形角。
[Abstract]:With the development of wind power generation technology, the design of high-power wind turbine is more and more popular. As the core part of wind turbine, the design of planetary transmission structure is very important. At present, most of the planetary transmission structures in the wind power gearbox are satisfied with the structure of 2-3MW. It is far from realizing the planning goal in the design and manufacture of high-power wind power equipment in the 12th Five-Year Plan: there is a long way to break through the whole machine and parts design of 10MW offshore wind turbine. At the same time, the gears used in the gearbox have many disadvantages, such as high vibration and noise, large deformation and heavy weight, and the gear parameters are not necessarily the optimal parameters in the planetary transmission, and there is no parameterized modeling assembly for the transmission structure. In view of the above problems, based on the theoretical analysis and finite element analysis, this paper studies the design theory of asymmetric involute gear, the design of planetary transmission structure and parameter optimization of wind power gear box. The application of asymmetric teeth to the planetary transmission of wind power gearbox is deeply analyzed. The main work is as follows: The main design parameters of planetary transmission of wind power gearbox are determined. Through the pre-design of three transmission structures of power shunt type, series transmission and common planetary transmission, compared with their transmission efficiency and weight, it is determined that the design structure is compact and efficient. Power shunt planetary transmission structure with high power to weight ratio and strong bearing capacity 10MW. A new type of asymmetrical involute gear is introduced in the design of planetary gear in wind power gear box. The new gear can improve the bearing capacity, improve the lubrication of the tooth surface, reduce the weight and size of the gear, and reduce the vibration and noise of the gear. Based on the study of the forming principle of asymmetric involute gear, the parametric modeling of asymmetric involute gear based on PROE is presented in this paper. At the same time, the parametric assembly of the gear box based on asymmetric planetary gear is carried out. Based on the parameterized model and ANSYS WORKBENCH, the contact stress and bending stress of each contact pair of unsymmetrical tooth wind power gearbox are analyzed by finite element method, and the results are compared with those of theoretical analysis. The correctness of finite element analysis is verified, and the bearing capacity of asymmetric and symmetrical teeth wind power gearbox is compared and studied. It is concluded that the planetary transmission of wind power box with asymmetric teeth can greatly improve the transmission effect. In order to find out the optimal unsymmetrical tooth shape angle, the maximum equivalent stress of the asymmetric tooth wind power gearbox is taken as the optimization objective, and the asymmetric tooth shape angle is regarded as the design variable. The optimal asymmetric gear angle is obtained by optimizing the wind power gearbox by discrete parameter optimization method.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM315;TH132.41

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