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Lubrication performance analysis of sealing structures in rodless open cylinders

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Abstract

As the lubrication performance of sealing structures in rodless open cylinders varies with sliding velocity, the concept of a critical velocity is proposed based on the aforementioned characteristics and the lubrication performance of sealing structure is analysed. A finite-element model of sealing structure is established and the oil film load under dynamic lubrication condition is obtained. A two-dimensional theoretical model of lubrication performance in sealing structure is established based on the proposed critical velocity. The influence on critical velocity of parameters including pre-compression, geometry size and microscopic morphology is analysed. Considering surface microscopic morphology, generation of heat by friction, heat flux distribution and other factors, a three-dimensional numerical model of lubrication performance of sealing structure is established to reveal the influence of texture mechanism on lubrication performance. As concluded, with the increase of pre-compression, the lip angle and the temperature of lubrication oil, the critical velocity increases. The three-dimensional microscopic morphology of seal ring is found to pose obvious influence on critical velocity, and the isotropic microscopic morphology tends to form total lubrication under the same conditions.

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Acknowledgements

Grateful thanks for the financial supports from Innovation Partnership Fund for Universities of China Aerospace Science and Technology Corporation (CASC), Natural Science Funds for Young Scholar of Jiangsu Province (No. BK20170-837) and the fundamental research funds for the central universities (No. 309181B8807). My thanks also go to the experts and the editors for their work.

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Authors and Affiliations

  1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China

    JianLin Zhong, DaWei Ma & Jie Ren

  2. Sixtieth Institute of the General Staff, Nanjing, 210016, China

    Lin Yao

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  1. JianLin Zhong
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  2. DaWei Ma
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  3. Jie Ren
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  4. Lin Yao
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Correspondence to Jie Ren.

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Zhong, J., Ma, D., Ren, J. et al. Lubrication performance analysis of sealing structures in rodless open cylinders. Sādhanā 44, 96 (2019). https://doi.org/10.1007/s12046-019-1089-x

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  • DOI: https://doi.org/10.1007/s12046-019-1089-x

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