填料环过盈组合密封性能研究

发布时间：2018-05-12 07:25

本文选题：填料环 + 填料函　；参考：《华中科技大学学报(自然科学版)》2017年09期

【摘要】：为改善填料函密封结构中径向接触应力分布不均匀问题,建立了填料环过盈组合密封结构,以及新密封结构的理论计算模型和有限元分析模型.填料轴向应力和径向接触应力分布的理论和仿真值具有较好的一致性,验证了理论模型的正确性及适用性.将过盈组合密封结构与传统填料密封结构作对比分析可知:当径向接触应力最小值一定时,与传统填料密封结构相比,过盈组合密封结构所需的压盖应力较小,减缓了填料随时间的松弛;过盈组合密封结构径向接触应力最大值与最小值的差值较小,提高了径向应力分布的均匀程度;过盈组合密封结构减小了填料对阀杆的转动摩擦力,提高了阀杆的机动性能.由此验证了过盈组合密封结构的性能,可为实际填料密封设计提供理论基础.
[Abstract]:In order to improve the uneven distribution of radial contact stress in the packing box seal structure, the theoretical calculation model and the finite element analysis model of the new seal structure are established. The theoretical and simulation values of axial stress and radial contact stress distribution of packing are in good agreement with each other, which verifies the correctness and applicability of the theoretical model. By comparing the interference seal structure with the traditional packing seal structure, it can be seen that when the radial contact stress is the minimum value, compared with the traditional packing seal structure, the combined interference seal structure requires less pressure than the traditional packing seal structure. The relaxation of packing with time is alleviated, the difference between maximum and minimum radial contact stress of interference seal structure is small, and the uniformity of radial stress distribution is improved. Improved the maneuverability of the stem. The performance of the interference-fit combined seal structure is verified, which can provide a theoretical basis for the practical packing seal design.
【作者单位】：海军工程大学动力工程学院;
【基金】：国防预研基金资助项目(9140A14000106JB11)
【分类号】：TH136

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