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| Stress and Deformation Analysis of Double-groove Stepped Groove Based on Thermal-fluid-solid Coupling |
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| DOI：10.7643/issn.1672-9242.2022.12.016 |
| KeyWord:double-groove stepped groove thermal-fluid-solid coupling sealing ring stress deformation |
| Author | Institution |
| ZHANG Qi-xuan |
School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
| ZHANG Wei-zheng |
School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
| ZHANG Zuo-li |
School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
| ZHAO Ji-jun |
School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
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| Abstract: |
| The work aims to obtain the dry gas sealing performance of double-groove stepped groove. The thermal-fluid-solid coupling was used to analyze the deformation and stress of the dynamic and static sealing rings with double-groove stepped groove and single spiral groove. The deformation maps and stress distribution maps of the sealing rings with two types of grooves were obtained under different working conditions. The effects of different working conditions on the deformation and stress of the sealing rings with two types of grooves were discussed. As the pressure increased, the growth rate of the maximum deformation of the sealing ring with single spiral groove was lower than that of sealing ring with double-groove stepped groove, while the growth rate of the maximum stress of the sealing ring with double-groove stepped groove was higher than that of sealing ring with single spiral groove. At 25 000 r/min, the maximum deformation of dynamic ring with double-groove stepped groove was 13.7% lower than that of dynamic ring with single spiral groove. Within the range of rotation speed, the maximum stress of single spiral groove and double-groove stepped groove decreased by 8% and 13.9%, respectively. With the increase of rotation speed, the difference of the maximum stress between the sealing rings with two types of grooves increased. The growth rate of the maximum deformation and stress of the sealing ring with double-groove stepped groove is higher than that of sealing ring with single spiral groove. The deformation and maximum stress of the sealing ring with double-groove stepped groove are less than those of sealing ring with single spiral groove. The results show that the double-groove stepped groove runs more stably at high speed. |
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