| Technical Status of Rotary Shaft Lip Type Rubber Seal for Automobile |
| Received:May 12, 2021 Revised:May 17, 2021 |
| DOI：10.12136/j.issn.1000-890X.2023.05.0375 |
| Key Words: rotary shaft lip type rubber seal；sealing mechanism；sealing performance；structural design |
| Author Name | Affiliation | E-mail | | FANG Yani* | Sinotruk Jinan Rubber & Plastic Parts Co.，Ltd | 19861891532@126.com | | HAN Zengbo | Sinotruk Jinan Rubber & Plastic Parts Co.，Ltd | |
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| Abstract: |
| The classification，sealing mechanism，structural design，parameter selection and development
trend of the rotary shaft lip type rubber seal（referred to as oil seal） for the automobile were summarized.
There were many types of the oil seals，including inner skeleton oil seal（type B），exposed skeleton oil seal
（type W），assembled oil seal（type Z），inner skeleton oil seal with auxiliary lip（type FB），exposed skeleton
oil seal with auxiliary lip（type FW），assembled oil seal with auxiliary lip（type FZ） and hydrodynamic oil
seal. The sealing mechanism of oil seal included boundary lubrication theory and surface tension sealing
theory. The structural design parameters of the oil seal，such as the inner and outer diameter interference，
radial force，follow-up ability and lip contact width，affected its service performance. The surface roughness，
machining method，material and hardness of the shaft had great impact on the sealing performance and service
life of the oil seal. The research on computer-aided design，computer-aided manufacturing and automatic
testing technology of oil seal would be further developed，and the application of new rubber materials in the
oil seal compound would be accelerated. |
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