基于流固耦合的胀圈密封流动及变形研究

doi:10.3901/JME.2025.11.216

摘要/Abstract

摘要： 胀圈密封功率损失在综合传动装置总功率损失中占有很高比例，研究胀圈密封内部流动和变形机理是减小功率损失和提高综合传动装置效率的重点。根据车辆传动系统运行条件，基于ANSYS Workbench平台建立了包括转轴、配油套及胀圈密封环在内的双向流固耦合数值计算模型，设计并搭建了胀圈密封性能试验系统，验证了数值模拟的准确性。采用数值模拟研究了油液温度、转轴转速及密封压差对胀圈密封内部流场、密封环变形、主密封面接触压力以及泄漏量的影响规律。研究表明：胀圈密封流道中，油液流入和流出槽体时分别呈现后向台阶流和射流的特点，槽体内产生分离涡；密封环最大变形及主密封面最大接触压力均出现在胀圈密封环切口处，密封压差对密封环变形影响最为显著。研究揭示的胀圈密封内部流动和变形规律对提升综合传动装置传动效率有参考意义。

关键词: 综合传动系统, 胀圈密封, 功率损失, 泄漏量, 数值模拟

Abstract: The power loss of the expansion seal ring occupies a high proportion in the total power loss of the integrated transmission device. The research of the internal flow characteristics and deformation mechanism of the expansion seal ring is the key to reduce the power loss and improve the efficiency of the integrated transmission device. According to the operating conditions of the vehicle transmission system, a two-way fluid-structure interaction numerical calculation model including the shaft, the oil distribution sleeve and the expansion ring seal ring is established based on the ANSYS Workbench platform. A test system for the sealing performance of the expansion ring is designed and built to verify the accuracy of the numerical simulation. The effects of oil temperature, shaft speed and sealing pressure difference on the internal flow field, sealing ring deformation, main sealing surface contact pressure and leakage of the expansion ring seal are studied by numerical simulation method. The research shows that in the internal flow field of the expansion seal ring, the oil flow into and out of the groove body presents the characteristics of backward step flow and jet flow respectively, and the separation vortex is generated in the groove body. The maximum deformation of the sealing ring and the maximum contact pressure of the main sealing surface appear at the notch of the expansion seal ring, and the seal pressure differential has the most significant influence on it. The internal flow and deformation law of the expansion seal ring revealed by the research has reference significance for improving the transmission efficiency of the integrated transmission device.

Key words: integrated transmission system, expansion seal ring, power loss, leakage, numerical simulation

中图分类号:

TB42

胡帅, 宫武旗, 冯伟, 邹天刚, 桂鹏. 基于流固耦合的胀圈密封流动及变形研究[J]. 机械工程学报, 2025, 61(11): 216-230.

HU Shuai, GONG Wuqi, FENG Wei, ZOU Tiangang, GUI Peng. Research on Flow and Deformation of Expansion Ring Seal Based on Fluid-structure Interaction[J]. Journal of Mechanical Engineering, 2025, 61(11): 216-230.

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