Research on Flow and Deformation of Expansion Ring Seal Based on Fluid-structure Interaction

doi:10.3901/JME.2025.11.216

Abstract

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

CLC Number:

TB42

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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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.2025.11.216

http://www.cjmenet.com.cn/EN/Y2025/V61/I11/216

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