共查询到20条相似文献,搜索用时 48 毫秒
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数控机床主轴行星轮变速装置,能够输出两段转速,当太阳轮、行星轮、行星架和齿轮套相对固定时,各齿轮间的啮合没有相对运动,齿轮无噪声,此时,行星轮变速装置的速比为1:1,满足了机床主轴高速运转的要求,当太阳轮、行星轮、行星架和齿轮套构成了行星轮减速轮系时,通过减速增大了扭矩,满足了机床主轴低速大扭矩输出的要求,该变速装置结构简洁,应用广泛。 相似文献
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《机械传动》2013,(11)
以轻量化设计为目的,在提高强度和保证刚度的条件下对双壁整体式行星架进行结构优化设计。首先基于APDL语言进行行星架参数化建模,计算齿轮的内、外啮合刚度和轴承支承刚度,对行星架进行有限元强度分析,并对行星架的部分结构参数进行灵敏度分析;然后以行星架的柔度最小为目标函数,材料密度为设计变量,体积分数为约束条件,建立拓扑优化数学模型;最后应用Hyperworks软件对其进行拓扑优化,根据材料分布建立行星架的概念模型,并进行结构设计。对优化前后行星架的性能进行比较,结果表明,在应力降低了8.74%的情况下,质量减少了17.34%,刚度基本不变,达到了优化设计的目的。 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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To improve the dynamic performance and reduce the weight of the planet carrier in wind turbine gearbox, a multi-objective optimization method, which is driven by the maximum deformation, the maximum stress and the minimum mass of the studied part, is proposed by combining the response surface method and genetic algorithms in this paper. Firstly, the design points’ distribution for the design variables of the planet carrier is established with the central composite design (CCD) method. Then, based on the computing results of finite element analysis (FEA), the response surface analysis is conducted to find out the proper sets of design variable values. And a multi-objective genetic algorithm (MOGA) is applied to determine the direction of optimization. As well, this method is applied to design and optimize the planet carrier in a 1.5 MW wind turbine gearbox, the results of which are validated by an experimental modal test. Compared with the original design, the mass and the stress of the optimized planet carrier are respectively reduced by 9.3% and 40%. Consequently, the cost of planet carrier is greatly reduced and its stability is also improved. 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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一种圆锥面无键联接接触压力和应力的解析计算方法 总被引:2,自引:0,他引:2
推导了计算圆锥无键联接的接触压力的解析公式,给出了心轴和套筒轴的径向应力、轴向应力、切向应力、Mises等效应力以及压入轴向力的方程.对解析解与等效直径的圆柱面无键联接近似解法、有限元法的计算结果进行了比较.在不考虑端部应力集中时,3种方法计算出的接触压力和Mises等效应力结果差别不大.进一步验证了近似解法的可行性,并为计算圆锥联接传递的扭矩和胀紧套的应力分析提供了依据. 相似文献
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将机床主轴与刀具相联接的刀柄是影响机床加工精度、刀具磨损及加工效率的关键部件.针对高速切削对刀柄的要求,建立了HSK-100A型刀柄的三维实体模型,同时利用有限元方法,对影响HSK-100A型刀柄/主轴联接性能的参数进行了分析,为HSK刀柄的实际应用提供一定的依据及指导. 相似文献
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推导了计算圆锥无键联接的接触压力的解析公式,给出了心轴和套筒轴的径向应力、轴向应力、切向应力、Mises等效应力以及压入轴向力的方程。对解析解与等效直径的圆柱面无键联接近似解法、有限元法的计算结果进行了比较。在不考虑端部应力集中时,3种方法计算出的接触压力和Mises等效应力结果差别不大。进一步验证了近似解法的可行性,并为计算圆锥联接传递的扭矩和胀紧套的应力分析提供了依据。 相似文献