The purpose of this paper is to analyze and improve the lubrication performance of a floating cylindrical seal by investigating micro spiral groove.,The lubrication model of is solved by finite difference, considering the influence of convergence eccentricity and Rayleigh step on the gas film period. A lubrication model, which is a gas film of floating microgroove cylindrical seal, is solved under high-precision central difference (finite-difference method-center) for the critical problems of convergence eccentricity and Rayleigh step. And then, an idea on the opening-leakage ratio is proposed, and a multiobjective optimization model is established. Finally, an experiment is conducted on a narrow gap to determine the gas film opening force and leakage by the modules of testing system, and the theoretical results are verified by real tests.,The theoretical calculation results agree well with the experimental data, which proves the correctness of the lubrication optimization model, and the optimized groove has better lubrication performance. On the other hand, the sealing pressure plays a more important role in the seal operation.,The theoretical model carries out low complexity and high sparseness, thus being very suitable for large-scale gas film problems. A multiobjective optimal function is established based on the opening-leakage ratio for optimizing groove. Finally, a curved groove of high precision and gas film opening force is obtained completely.,The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-02-2020-0048/

中文翻译：

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浮动微槽圆柱密封润滑的理论优化与试验

本文的目的是通过研究微螺旋槽来分析和提高浮动圆柱密封的润滑性能。考虑收敛偏心和瑞利阶跃对气膜周期的影响，采用有限差分法求解润滑模型。针对收敛偏心和瑞利步长等关键问题，在高精度中心差（有限差分法-中心）下求解了浮动微槽圆柱密封气膜润滑模型。然后，提出了开漏比的思想，建立了多目标优化模型。最后，通过测试系统各模块在窄间隙上进行了气膜开启力和泄漏量的实验，并通过实际测试验证了理论结果。理论计算结果与实验数据吻合较好，证明了润滑优化模型的正确性，优化后的沟槽具有更好的润滑性能。另一方面，密封压力在密封操作中起着更重要的作用。该理论模型进行了低复杂度和高稀疏性，因此非常适用于大规模气膜问题。基于开漏比建立多目标优化函数来优化凹槽。最终完全得到了一个高精度和气膜开启力的曲线槽，本文同行评议历史见：https://publons.com/publon/10.1108/ILT-02-2020-0048/ 证明了润滑优化模型的正确性，优化后的槽具有更好的润滑性能。另一方面，密封压力在密封操作中起着更重要的作用。该理论模型进行了低复杂度和高稀疏性，因此非常适用于大规模气膜问题。基于开漏比建立多目标优化函数来优化凹槽。最终完全得到了一个高精度和气膜开启力的曲线槽，本文同行评议历史见：https://publons.com/publon/10.1108/ILT-02-2020-0048/ 证明了润滑优化模型的正确性，优化后的槽具有更好的润滑性能。另一方面，密封压力在密封操作中起着更重要的作用。该理论模型进行了低复杂度和高稀疏性，因此非常适用于大规模气膜问题。基于开漏比建立多目标优化函数来优化凹槽。最终完全得到一个高精度和气膜开启力的弯槽。，本文同行评审历史可在：https://publons.com/publon/10.1108/ILT-02-2020-0048/ 该理论模型实现了低复杂度和高稀疏性，因此非常适用于大规模气膜问题。基于开漏比建立多目标优化函数来优化凹槽。最终完全得到了一个高精度和气膜开启力的曲线槽，本文同行评议历史见：https://publons.com/publon/10.1108/ILT-02-2020-0048/ 该理论模型实现了低复杂度和高稀疏性，因此非常适用于大规模气膜问题。基于开漏比建立多目标优化函数来优化凹槽。最终完全得到了一个高精度和气膜开启力的曲线槽，本文同行评议历史见：https://publons.com/publon/10.1108/ILT-02-2020-0048/