Structural Design and Performance Analysis of a Deep-Water Ball Joint Seal

Hou, Yaxin; Tang, Qian; Wu, Zhixing; Liu, Xiaoming

doi:10.1007/s11804-018-0030-8

“…ZHANG N et al [8] tested the sealing performance and compression strain under different sealing stress in the pneumatic low-temperature control valve under the temperature of liquid nitrogen. Hou Y et al [9] used the theory of finite element technology and non-linear theory to study the sealing performance of new spherical sealing parts consisting of silicon rubber and polytetrafluoroethylene at low temperatures and high pressure. The existing research on the low-temperature sealing performance of valves is mostly concentrated in the fields of LNG, liquid nitrogen, and other low -temperature valves.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization design of double resilient groove metal seat for ball valve in liquid hydrogen receiving stations

Li,

Zheng,

Wang

et al. 2023

J Braz. Soc. Mech. Sci. Eng.

0

View full text Add to dashboard Cite

For the liquid hydrogen receiving station ball valve seat in ultra-low temperature working conditions the cold shrinkage deformation is easy to lead to valve seal failure. Design a dual-elastic groove metal valve seat and a preliminary assessment of its performance. the seat performance is optimized based on the RBF approximation model combined with the NSGA-II algorithm. Use the Spearman method to analyze the sensitivity analysis and determine the optimized design variable. Based on the maximum equivalent stress Smax, maximum deformation Dmax, minimum fatigue life Lmin, and mass M as the optimized goal, the optimal Latin superposition method samples the valve seat structure parameters, and the establishment of High-precision RBF proxy model combined with the NSGA-Ⅱ algorithm to find excellent PARETO cutting-edge solutions, comprehensively considering the performance requirements of valve seats to determine the optimal structural parameters of the valve seat. The maximum stress of the valve seat after the optimization decreased by 43.45%, the maximum deformation decreased by 45.33%, the quality was reduced by 22.49%, and the life expectancy increased by 114.11%. The finite element analysis of the seal verifies that the optimized seat has an excellent compensation effect under the ultra-low temperature conditions of liquid hydrogen.

show abstract

“…Zhang Y [10] innovatively adopted the technology of a ceramic coating on a spherical seal, showing it can reduce the wear of the contact surface and improve the sealing performance of the seals. Yongjun Hou et al [11] proposed a new type of spherical seal with silicone rubber and PTFE composites as the main materials. O-rings and PTFE elastic material are able to mitigate any lack of precision in the spherical joint manufacturing process, which reduces the processing accuracy requirements for the spherical surface.…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis and Experimental Study on the Spherical Seal of a Subsea Connector Based on a Non-Standard O-Ring Seal

Liu

¹

,

Yun

²

,

Jiao

³

et al. 2022

JMSE

View full text Add to dashboard Cite

Underwater oil and gas pipelines are prone to alignment differences and angle offsets during docking, and the spherical flange connector can address this problem. Its main function is to enable compensation of the different angles of the pipeline during docking and to apply a non-standard spherical sealing structure using O-rings to the connection. In this paper, the study of a spherical sealing structure using O-rings was based on a spherical structural model of the connector. The Mooney–Rivlin constitutive equation and material parameters of the O-ring were determined according to nonlinear theory. The structure of the non-standard spherical sealing groove was designed and analysed with reference to the standard sealing groove, the calculation expression of the spherical groove specific size was deduced, and the width and depth of the groove were determined. A finite element analysis of the non-standard O-ring sealing structure was carried out using ANSYS Workbench software; the effects of different pressures and compression ratios on the O-ring sealing performance were analysed and studied in terms of von Mises stress, contact pressure and contact width of different contact surfaces so as to determine a more reasonable compression ratio in the sealing structure. Finally, the theoretical analysis of the non-standard spherical sealing structure using O-rings was validated by testing, and it was proven that it could maintain a good seal under high pressure.

show abstract

Multi-Objective Optimization Design of Double Resilient Groove Metal Seat for Ball Valve in Liquid Hydrogen Receiving Stations

Li,

Zheng,

Wang

et al. 2023

Preprint

0

View full text Add to dashboard Cite

For the liquid hydrogen receiving station ball valve seat in ultra-low temperature working conditions the cold shrinkage deformation is easy to lead to valve seal failure. Design a dual-elastic groove metal valve seat and a preliminary assessment of its performance. the seat performance is optimized based on the RBF approximation model combined with the NSGA-II algorithm. Use the Spearman method to analyze the sensitivity analysis and determine the optimized design variable. Based on the maximum equivalent stress Smax, maximum deformation Dmax, minimum fatigue life Lmin, and mass M as the optimized goal, the optimal Latin superposition method samples the valve seat structure parameters, and the establishment of High-precision RBF proxy model combined with the NSGA-Ⅱ algorithm to find excellent PARETO cutting-edge solutions, comprehensively considering the performance requirements of valve seats to determine the optimal structural parameters of the valve seat. The maximum stress of the valve seat after the optimization decreased by 43.45%, the maximum deformation decreased by 45.33%, the quality was reduced by 22.49%, and the life expectancy increased by 114.11%. The finite element analysis of the seal verifies that the optimized seat has an excellent compensation effect under the ultra-low temperature conditions of liquid hydrogen.

show abstract

Structural Design and Performance Analysis of a Deep-Water Ball Joint Seal

Cited by 3 publications

References 17 publications

Multi-objective optimization design of double resilient groove metal seat for ball valve in liquid hydrogen receiving stations

Multi-objective optimization design of double resilient groove metal seat for ball valve in liquid hydrogen receiving stations

Structural Analysis and Experimental Study on the Spherical Seal of a Subsea Connector Based on a Non-Standard O-Ring Seal

Multi-Objective Optimization Design of Double Resilient Groove Metal Seat for Ball Valve in Liquid Hydrogen Receiving Stations

Contact Info

Product

Resources

About