基于MpCCI方法的密封环双向流固耦合模拟与试验研究

doi:10.3969/j.issn.1004-132X.2021.14.001

摘要/Abstract

摘要： 为预测重载越野车辆传动系统中密封系统的流固耦合特征，综合考虑密封环在微小约束空间内的受力状态以及密封间隙流场中的流动特点，建立了密封环双向流固耦合数值模型并提出了求解策略。采用多物理场代码耦合工具MpCCI联合FLUENT与Abaqus软件对旋转密封系统进行双向流固耦合数值计算，获得了旋转密封间隙流场中油液的流动状态。分析了密封环变形对密封系统泄漏量和密封环摩擦转矩的作用特征，通过双向流固耦合的动态模拟考察了传动系统工况对密封环性能的影响。利用车辆传动系统密封环综合性能试验台进行了密封性能的试验测试，对比发现计算值和试验值的变化规律具有一致性，验证了密封流固耦合数值模型及其计算结果的正确性。

关键词: 传动系统, 密封环, 流固耦合, 密封试验

Abstract: To predict the fluid-solid coupling characteristics of sealing systems in transmission of heavy-duty off-road vehicles, the stress state of sealing rings in small confined spaces and the flow characteristics in flow fields of rotating sealing gaps were taken into account, and then the numerical models of two-way fluid-solid coupling for sealing systems were established and the solving methods were presented. The multi physics code coupling tool MpCCI was combined with FLUENT and Abaqus to carry out the numerical calculations of two-way fluid-solid coupling of rotary sealing systems. According to the fluid-solid coupling calculations, the flow states of oil in flow fields of rotary sealing gaps were obtained. The effective characteristics of sealing ring deformations on the leakage of rotary sealing systems and the friction torques of sealing rings were studied. The influences of transmission system working conditions on sealing ring performances were explored by two-way fluid-solid coupling dynamic simulation. Experimental investigations were performed in sealing performance test rig for sealing rings of vehicle transmission systems. Comparisons of numerical and experimental results show a good consistency of their change rules, which verifies the correctness of sealing fluid-solid coupling numerical models and calculation results.

Key words: transmission system, sealing ring, fluid-solid coupling, sealing experiment

中图分类号:

TH117

宫燃, 张真宇, 程志高, 徐宜, 张鹤. 基于MpCCI方法的密封环双向流固耦合模拟与试验研究[J]. 中国机械工程, 2021, 32(14): 1639-1646.

GONG Ran, ZHANG Zhenyu, CHENG Zhigao, XU Yi, ZHANG He. Two-way Fluid-Solid Coupling Simulation and Experimental Research of Sealing Rings Based on MpCCI Method[J]. China Mechanical Engineering, 2021, 32(14): 1639-1646.

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