矿用减速器斜齿轮系统动态特性研究与优化

发布时间：2018-06-23 18:34

本文选题：齿轮系统 + 动态特性　；参考：《太原理工大学》2017年硕士论文

【摘要】：矿用减速器作为煤矿机械设备中十分重要的组成部分,在运动和动力传递过程中起着不可替代的作用,但其运行工况往往比较恶劣、连续运转时间长、常常受到各种冲击载荷的作用,其工作性能的好坏直接影响着整个煤矿机械设备的工作性能的好坏,因此有必要对矿用减速器齿轮系统的动力学特性进行研究,并对齿轮系统动态特性进行参数优化,提高矿用减速器承载能力和使用寿命、降低振动和噪声。本文主要研究内容如下:(1)运用Romax软件建立矿用减速器两级平行轴斜齿轮系统分析模型,在额定工况下对两级齿轮进行静力学分析,得到各齿轮的最大接触应力、最大弯曲应力和齿轮系统啮合错位量分布情况;接着分析两级齿轮副的啮合状态和齿面载荷分布,找到偏载严重且受载更大的那对齿轮副。(2)计算得到输出级斜齿轮副的时变啮合刚度和受载传动误差曲线,分析不同程度齿面磨损对斜齿轮副啮合刚度和传动误差的影响,为齿轮系统动态特性分析提供基础。(3)分析齿轮系统在输出级斜齿轮副传动误差激励下的系统模态柔度,并找出系统模态柔度最大的前6阶模态频率,再通过固有模态分析得到对应的固有模态振型;以输出级齿轮传动误差一阶谐波为激励,获得齿轮系统各轴承动态轴承力和轴承振动加速度的动态响应;计算不同程度齿面磨损对轴承力和轴承振动加速度的影响;介绍轮齿不同类型齿面偏差的定义,分析不同类型齿廓偏差和螺旋线偏差对系统动态响应的影响规律。(4)介绍斜齿轮齿廓和齿向修形原理和方法,以齿轮传动误差波动最小化为目标,以齿轮齿廓、齿向修形参数为设计变量,运用遗传算法对齿轮副齿面进行初始优化;通过分析各设计变量对齿轮传动误差波动的影响,得到了最佳设计变量组合;对齿轮副齿面进行二次修形优化,获得了最佳修形优化方案;通过对比优化前后齿轮啮合状态和齿面载荷分布,以此来验证优化结果的正确性。
[Abstract]:As a very important part of coal mine machinery and equipment, the mining reducer plays an irreplaceable role in the process of motion and power transmission, but its operating conditions are often bad, and the continuous running time is long, and it is often affected by various impact loads. The working performance of the coal mine is directly affected by the work of the whole coal mine machinery and equipment. For good or bad performance, it is necessary to study the dynamic characteristics of the gear system of the mining reducer, optimize the dynamic characteristics of the gear system, improve the bearing capacity and service life of the mining reducer, and reduce the vibration and noise. The main contents of this paper are as follows: (1) Romax software is used to establish the two level parallel of the mining reducer. The analysis model of the axis helical gear system is carried out on the statics analysis of two stage gear under the rated condition. The maximum contact stress, maximum bending stress and gear system meshing dislocation distribution are obtained. Then the meshing state and the load distribution of the two gear pair are analyzed, and the pair of gear pairs with serious load and larger load are found. (2) the time-varying meshing stiffness and the load transmission error curve of the output grade helical gear pair are calculated, and the influence of the tooth surface wear on the meshing stiffness and transmission error of the helical gears is analyzed, which provides the basis for the analysis of the dynamic characteristics of the gear system. (3) the system modal flexibility under the transmission error of the transmission stage helical gear pair is analyzed. The first 6 order modal frequencies of the maximum system modal flexibility are found, and the inherent modal vibration modes are obtained by the inherent modal analysis. The dynamic response of the dynamic bearing force and the bearing vibration acceleration of each bearing in the gear system is obtained by the first order harmonic of the output gear transmission error, and the bearing force of different degree of tooth surface wear to the bearing force is calculated. The influence of the vibration acceleration of the bearing is introduced. The definition of the tooth surface deviation of different types of gear teeth is introduced, and the influence of the different types of profile deviation and spiral line deviation on the dynamic response of the system is analyzed. (4) the principle and method of the helical gear profile and tooth profile modification are introduced, with the objective of the gear transmission error minimization, the gear profile and the tooth profile modification parameter. For the design variables, the genetic algorithm is used to optimize the gear pair tooth surface. By analyzing the influence of the design variables on the gear transmission error fluctuation, the optimum design variable combination is obtained. The optimization of the gear pair tooth surface is optimized two times, and the optimum modification is obtained. By comparing the gear meshing state and tooth before and after the optimization, the gear tooth surface is optimized. Surface load distribution is used to verify the correctness of the optimization results.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD40

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