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行星齿轮传动不均载的原因主要是由于行星齿轮传动装置各零部件存在着加工和装配误差,而各种误差对均载的影响情况又是不同的。本文通过对行星齿轮传动的每一个行星轴的受力弯曲变形进行比较,求得动态载荷分配情况。通过对行星齿轮减速器的载荷变动曲线进行频谱分析,找出各误差对行星齿轮减速器的均载性能的影响程度。 相似文献
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行星齿轮传动的可靠性主要由能否在各行星轮间实现功率分流来决定。基于非线性有限元分析方法对行星轮系均载性能进行研究。以刮板输送机用可控软启动装置齿轮箱行星传动部分为研究对象,利用ANSYS/LS-DYNA进行非线性动力学仿真,求解得到各啮合副的动态接触力及其频谱曲线,分析了不同均载措施、冲击载荷、惯性载荷、输入转速及接触参数对系统均载性能的影响。研究结果表明,太阳轮与行星架同时浮动的均载效果显著,冲击载荷的作用与转速的增加将使行星轮间的载荷分配更不均匀,行星架的轻质可使行星轮间载荷分配更均匀。 相似文献
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根据行星齿轮功率分流传动的特点,提出多个齿轮接触的齿面加载接触分析方法。考虑了安装误差条件下的齿面准确几何形态,提出行星齿轮齿面几何接触分析(TCA)方法并获得外(内)各齿轮副的相对齿面间隙;通过一次有限元柔度系数计算获得各齿轮的柔度系数,各外(内)齿轮辐接触点的法向柔度系数通过分别插值太阳轮和行星轮(行星轮和齿圈)齿面网格节点的柔度系数并叠加获得;结合齿轮的几何分析与力学分析,将多个齿轮副受力接触转化为求解齿面有限个离散接触点的力学平衡问题,通过数学规划的方法求解非线性方程组得到加载后各齿轮副的齿面变形、啮合刚度、载荷分布、行星轮均载系数。多载荷传动误差和载荷分配进一步反映了行星传动啮合性能,为高性能行星传动齿面的修形设计、动力学分析奠定了理论基础。 相似文献
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为研究星轮个数及间隙对行星传动系统动态均载特性的影响情况,基于集中参数理论,考虑了误差、支撑刚度、载荷及间隙等因素,建立了中心轮浮动式行星传动系统的动力学模型;采用Runge-Kutta数值方法对模型进行求解,建立了星轮个数、间隙与均载特性的影响关系。结果表明,随着齿侧间隙的变化,均载系数快速下降后趋于平缓,且齿侧间隙具有补偿作用,减弱了行星轮增多导致的分配不均现象,提高了系统的均载特性;随着支撑间隙增大,均载系数几乎以恒定速度快速下降后保持不变,且支撑间隙使得系统处于浮动传动状态,具有较好的均载特性;小转矩时,系统对间隙敏感程度高,可以有效缓解误差所引起的分配不均问题;随着转矩增大,误差激励受到抑制,均载性能提高。 相似文献
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Load sharing characteristics of planetary transmissions 总被引:23,自引:0,他引:23
Ahmet Kahraman 《Mechanism and Machine Theory》1994,29(8):1151-1165
A nonlinear time-varying dynamic model of a planetary transmission with an arbitrary number of pinions is developed. The model includes several manufacturing errors and assembly variations, and can accommodate for any pinion spacing arrangement, tooth separations and time-varying gear mesh stiffnesses. A dynamic load sharing factor KDLS, which is defined as the ratio of the actual dynamic load at a given gear mesh to the ideal static load, is predicted using the dynamic model. Key design parameters, assembly variations and manufacturing errors are identified, and their effects on KDLS are quantified. 相似文献
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建立了行星齿轮传动系统的动力学均载模型,模型中考虑了系统的综合啮合误差和时变啮合刚度。分析了太阳轮的支承刚度对行星齿轮系动力学均载的影响。计算结果表明,太阳轮的支承刚度对系统的均载影响比较大;随着支承刚度的增大,系统的均载系数增大。减小太阳轮的支承刚度,可以改善系统的均载性能。 相似文献
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建立风电齿轮箱行星传动系统静力学模型,对比理论模型下的均载与实验下的均载,确定理论模型的正确性。将太阳轮、行星轮、内齿圈和行星架等构件的误差分为两类误差,以不同误差构件数量为基础,分别分析在两类误差作用下的均载与太阳轮轨迹中心方位角,并与综合误差作用下的均载与太阳轮轨迹中心方位角进行对比。建立了两类误差下的均载、综合误差下的均载与太阳轮轨迹中心方位角之间的关系,发现了太阳轮轨迹中心变化的平行四边形法则。此误差对行星传动系统均载的影响提供了新的研究思路。 相似文献
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Influence of manufacturing errors on the dynamic characteristics of planetary gear systems 总被引:1,自引:0,他引:1
A dynamic analysis using a hybrid finite element method was performed to characterize the effects of a number of manufacturing
errors on bearing forces and critical tooth stress in the elements of a planetary gear system. Some tolerance control guidelines
for managing bearing forces and critical stress are deduced from the results. The carrier indexing error for the planet assembly
and planet runout error are the most critical factors in reducing the planet bearing force and maximizing load sharing, as
well as in reducing the critical stress. 相似文献
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IGLESIAS Miguel FERNáNDEZ DEL RINCóN Alfonso DE-JUAN Ana Magdalena GARCIA Pablo DIEZ Alberto VIADERO Fernando 《机械工程学报(英文版)》2015,(4)
In order to satisfy the increasing demand on high performance planetary transmissions, an important line of research is focused on the understanding of some of the underlying phenomena involved in this... 相似文献
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Wei Sun Xiang Li Jing Wei Aiqiang Zhang Xin Ding Xinglong Hu 《Journal of Mechanical Science and Technology》2015,29(4):1501-1511
Unequal load distribution is a crucial factor in decreasing bearing capacity and stability of the planetary transmission system. In this paper, a dynamical model of two-stage helical planetary gear transmission system is established based on lumped-parameter method and Lagrange general function. Nonlinearity of gear tooth backlash and error is taken into account. Four load-sharing structures are proposed to study the load-sharing performance. A method to calculate dynamic sensitivity of load-sharing coefficient to errors is presented that can provide a reference to component precision determination in order to make planetary system have a better load distribution. Finally, a numerical method of load-sharing performance is validated by a test. These results provide fundamental basis for multi-stage planetary gear transmission system design. 相似文献
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Influence of bearing stiffness on the static properties of a planetary gear system with manufacturing errors 总被引:1,自引:0,他引:1
Hybrid finite element analysis was used to analyze the influence of bearing stiffness on the static properties of a planetary
gear system with manufacturing errors. The effects of changes in stiffness were similar for most of the manufacturing errors.
State variables were most affected by the stiffness of the planet bearings. Floating either the sun or carrier helps to equal
load sharing and minimizes the critical tooth stress. The effects of a floating sun and carrier are similar, but it is not
recommended that both float, because this can induce greater critical tooth stress. Planet bearing stiffness should be optimized.
Both load sharing and critical tooth stress should be considered to determine optimal bearing stiffness. 相似文献
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考虑随机制造误差的风力机行星齿轮系统动力学特性 总被引:5,自引:0,他引:5
为研究综合传递误差的随机波动对风力发电机齿轮传动系统动力学特性的影响,考虑齿轮时变啮合刚度、综合传递误差等因素,建立风力发电机行星齿轮传动系统纯扭转动力学模型。以随机风速引起的齿轮系统转矩波动作为行星齿轮系统的外部激励,对某1.5 MW风力发电机行星齿轮传动系统的动力学特性进行仿真分析,得到系统各响应量时域内的统计特征和齿轮副间的动态啮合力统计特征。分析表明:行星架、行星轮和太阳轮在扭转方向上的振动特性与外部载荷相关,其振动位移与外部载荷波动有相似变化的趋势;综合传递误差随机分量的离散程度对行星齿轮系统的动态特性和齿轮副间的动态啮合力有较大影响。随着综合传递误差随机分量离散程度的增加,行星架、太阳轮和行星轮在扭转方向上的振动幅值明显增加;综合传递误差随机分量的随机性使齿轮副间动态啮合力产生随机波动,随机分量离散程度越大,动态啮合力波动越明显;当随机分量的离散程度达到某一值时,齿轮啮合过程发生脱离,引发啮合冲击。 相似文献