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由推力调心滚子轴承设计原理,推出了轴圈滚道圆弧母线中心坐标的精确计算公式。为便于加工,轴圈挡边增加了直挡边设计,由几何关系确定了保持架外圆柱面直径。改进设计后的轴承,结构合理,加工方便。附图2幅,参考文献6篇。 相似文献
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本文描述了可倾式弹性金属氟塑料(EMP)瓦推力轴承的热弹流数学模型并对推力瓦型面进行分析。根据EMP瓦实际运行工况,作者提出了EMP瓦表面存在滑移的假设,对Reynolds方程引进了滑移边界条件。 相似文献
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采用有限元软件ANSYS对船用推力轴承壳体进行了优化设计研究.建立了推力轴承壳体三维模型,根据轴承实际应用工况对其进行约束和载荷施加,获得了壳体应力及变形云图.在保证推力轴承安全的前提下,以减少质量为目标,对壳体结构尺寸进行了优化.对比分析结果表明,优化后壳体尺寸更加合理,大大降低了设备重量. 相似文献
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给出了动静压径向推力联合浮环轴承推力部分内、外层油膜Reynolds方程和边界条件,通过有限元计算得到了不同间隙和转速下内、外层油膜的压力分布和静、动态特性参数。采用深腔作为节流腔,分析计算了该内置扁毛细管节流的相当节流比。该推力浮环轴承与透平膨胀机组原来使用的五瓦可倾瓦轴承相比,稳定工作时摩擦功耗降低约26%。 相似文献
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介绍了立式泵中轴承的工作原理,把改进后的轴承体结构应用到了立式泵的设计中,根据试验结果和现场的实际运行情况证明了该设计方法是可靠的。 相似文献
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装载机差速器的可靠性优化设计 总被引:2,自引:1,他引:1
运行可靠性设计理论和最优化设计技术,提出了装载机差速器的可靠性优化设计方法。建立了可靠性优化设计数学模型并给出了优化实例和结果分析。 相似文献
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The combined effects of external pressurization and in-pump spiral grooves are studied according to the incompressible Whipple analysis; the results are examined in terms of non-dimensional parameters that bring out the interaction between the action of the spiral groove self-pressurization and that of the external pressurization through orifices. It is found that the interaction is significant when the supply pressure level to the orifices is near the peak pressure that can be reached by the spiral grooves alone. An optimized interacting design can improve the bearing stiffness. Away from the optimized interacting design, one of the two actions would dominate and the other one would cause a detraction of the bearing performance. As speed is sufficiently high, the pressurization action of spiral grooves causes the reduction of orifice flow and even its reversal. At such a condition the orifices are merely leakage paths that detract from the self-pressurization action of the spiral grooves. These predicted trends are qualitatively substantiated by tests. 相似文献
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文中介绍了扭摆式硅微加速度计的结构原理和对其进行最大灵敏度优化设计的方法,计算结果表明,对硅微速度计的结构参数进行优化,可以最大限度地提高传感器的性能。 相似文献
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A thermoelastohydrodynamic theory for the analysis of sector thrust bearings is presented. The analysis includes the generalized Reynolds equation and a fully elliptic three-dimensional energy equation in the film. In addition, full three-dimensional heat transfer is allowed in the pad while axisymmetric conduction is allowed in the runner. Three-dimensional elastic deformation due to mechanical and thermal loading is allowed in the pad while axisymmetric mechanical elasticity is allowed in the runner. The performance of a parallel tapered-land thrust bearing including runner deformation effects is analyzed as a function of different models. It is seen that mechanical deformation of the pad affects the operating characteristics only slightly while thermal deformation of the pad can cause large increases in operating temperature. The runner deformation effects can include a reduction of the maximum film temperature at slight deformation or a large increase in film temperature at the inner radius of the pad at larger deformations. 相似文献
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分析了自衡水箱系统的微分方程动态模型,用一阶传递函数模型的辨识方法可以得出水箱的数学模型,并给出了PID算法。通过实验平台对模型与算法进行了验证,并对实验数据与理论数据进行了比较,证明模型与算法的设计都是可行的,从而为利用PLC实现PID控制提供了理论基础。 相似文献