基于动网格的液压滑阀流固耦合分析

发布时间：2018-05-21 02:09

  本文选题：液压滑阀 + 动网格　； 参考：《液压与气动》2017年12期

【摘要】：采用基于动网格的流固耦合分析方法,建立了液压滑阀开启过程的三维动态数值分析模型,计算阀芯在驱动力、流体力和弹簧力共同作用下的运动分布、应力变化和形变。结果表明:提供一种分析液压滑阀开启过程的数值仿真方法,阀芯在开启完毕达到稳态后仍有小幅振动;阀芯的径向形变主要发生在阀杆上,且变形量随时间产生小幅波动;阀芯由于油液的冲击在入口处产生较大变形并在台肩与阀杆连接处产生应力集中,采用CFD方法得到的液压滑阀运动分布、应力变化、形变和理论值的误差在可以接受的范围内,证明了仿真的可靠性。
[Abstract]:Based on the fluid solid coupling analysis method based on dynamic grid, a three-dimensional dynamic numerical analysis model of the opening process of the hydraulic valve is established. The movement distribution, the stress change and the deformation of the valve core under the action of driving force, fluid force and spring force are calculated. The results show that a numerical simulation method for the opening process of the hydraulic slide valve is provided, and the valve core is provided. There is still a small amplitude vibration after the opening up to the steady state; the radial deformation of the valve core mainly occurs on the stem, and the deformation amount fluctuates with the time. The valve core produces a large deformation at the entrance due to the oil shock and produces stress concentration at the joint of the shoulder and the stem, and the distribution of the hydraulic slide valve is obtained by the CFD method, and the stress changes are changed. The accuracy of the simulation is proved to be acceptable within the acceptable range.
【作者单位】： 解放军理工大学野战工程学院;
【基金】：国家自然科学基金(51175511)
【分类号】：TH137.52
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本文编号：1917257