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| Experiment and Simulation on the Failure Factors of a Marine Lip Seal |
| Received:May 25, 2023 Revised:August 14, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.11.013 |
| KeyWord:lip seal failure factor analysis orthogonal experiment contact analysis nonlinear material finite element simulation |
| Author | Institution |
| YANG Li-qiang |
Bureau of Military Representative of the Naval Armaments Department in Guangzhou, Guangzhou , China |
| YE Hui |
Chongqing Gear Box Co.Ltd., Chongqing , China |
| LIU Zhen |
Chongqing Gear Box Co.Ltd., Chongqing , China |
| FENG Jian |
Chongqing Gear Box Co.Ltd., Chongqing , China |
| JIA-Long-kai |
Chongqing Gear Box Co.Ltd., Chongqing , China |
| FENG Fu-shun |
Chongqing Gear Box Co.Ltd., Chongqing , China |
| ZENG Zhao-yong |
Chongqing Gear Box Co.Ltd., Chongqing , China |
| CHEN Jie |
Chongqing Gear Box Co.Ltd., Chongqing , China |
| MOU Pei |
Chongqing Gear Box Co.Ltd., Chongqing , China |
| SONG Jin-peng |
Chongqing Gear Box Co.Ltd., Chongqing , China |
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| Abstract: |
| The work aims to study the affecting factors of lip seal failure and the distribution characteristics of stress, displacement and contact pressure of lip seal, so as to solve the problem of lip breakage during the use of marine lip seal.A test bench was built to simulate the input structure of a real marine gear box to analyze the failure factors of the seal. A two-dimensional axisymmetric model of the rotary lip seal was established by finite element analysis software to analyze the effects of interference and rubber body material parameters on the stress distribution, displacement distribution and lip tip contact pressure distribution of the lip seal.Almost no leakage occurred under the factors except the uncertain factors such as sealing material and sealing contact stress. Therefore, the finite element analysis of different materials and contact characteristics was further carried out, and the study showed that the Von Mises stress value of No. 2 material was found to be the largest after calculation of the three materials, and for any kind of material, with the increase of the interference, the lip tip stress increased firstly along the reference line, then gradually decreased and then increased, and presented an asymmetric distribution. When the interference exceeded 0.4 mm, the maximum stress of the lip seal appeared at the rounded corner of the contact between the skeleton and the rubber body. With the increase of interference, the change trend of the maximum contact pressure at the lip tips of three materials was different and the maximum Von Mises contact stress gradually increased, the interference increased faster after 0.6 mm, and the contact pressure at the lip tip contact line firstly decreased and then gradually increased. The inflection point was between 0.25 mm and 0.3 mm at the position of the contact line.It is found that oil temperature, oil pressure, installation mode, eccentricity and rotating speed have little effect on the failure factors of lip seal. The Von Mises stress and the contact pressure of the lip tip of the lip seal will change greatly due to the material property and interference, but the peak value of the stress will be different. The displacement of the lip seal body will not be affected by the material property, but the interference will cause a large change in displacement and the maximum stress position, and there is no correlation between contact stress and contact pressure. For the installation of lip seal, it is reasonable when the interference is about 0.8 mm. |
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