Volume 3 · Issue 5 (2026)
DOI number:
10.66521/2938-9933-2026053101
Contact Stress Distribution and Leakage Risk Control of Rotary Shaft Lip Seals
Jing Wang1,*, Zhonghua Zhou2
1 Chongqing Technology and Business Institute, Chongqing Open University, Chongqing 401520, China
2 China Oilfield Services Limited, Sanhe 065200, Hebei, China
Corresponding Author: Jing Wang (1065560315@qq.com)
Funding: Scientific and Technological Research Project of Chongqing Municipal Education Commission (No. KJQN202204018): Research on Sealing Mechanism of Mechanical Equipment Lip Seal
Abstract: Rotary shaft lip seal in high-speed transmission, pump shaft and vehicle power system to assume the function of media retention and pollution isolation, lip contact stress attenuation will induce oil film rupture and leakage channel expansion. In order to improve the recognition accuracy of seal state, this paper established a finite element contact model between lip and rotating shaft, introduced parameters such as interference, spring preload, friction coefficient, speed load and interface temperature rise, and used local mesh encryption and surface-surface contact algorithm to solve the stress distribution. At the same time, the stress cloud map is transformed into the average contact stress, the proportion of low-pressure area, the continuity of contact zone and the circumferential fluctuation coefficient. Combined with the temperature rise and wear depth, the leakage risk identification and structural optimization method are constructed, and the engineering control process that can be calculated, judged and feedback is formed. The results show that the peak values of contact stress at 1000, 3000 and 5000 r/min are about 0.46, 0.39 and 0.31 MPa, respectively. After 90 minutes of operation, the risk index of the optimized structure is 0.43, which is 34.8% lower than that of the conventional structure. The research can provide a basis for lip seal design, condition evaluation and active leakage control.
Keywords: Rotary shaft lip seal; Contact stress distribution; Leakage risk control; Finite element simulation
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