Journal of Shandong University(Engineering Science) ›› 2026, Vol. 56 ›› Issue (4): 188-196.doi: 10.6040/j.issn.1672-3961.0.2025.012

• Mechanical Engineering • Previous Articles    

Optimization of hard seal mechanism of hydrodynamic high-pressure ball valve for deepwater oil and gas underwater test tree

Zhang Maoqi1, Tang Yang1*, Mo Li1, Shu Jiangjun2,3, Wei Jianfei4, Tan Zhenxing4   

  1. Zhang Maoqi1, Tang Yang1*, Mo Li1, Shu Jiangjun2, 3, Wei Jianfei4, Tan Zhenxing4(1. School of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China;
    2. China Coal Technology &
    Engineering Group Chongqing Research Institute Co., Chongqing 400039, China;
    3. State Key Laboratory of Gas Disaster Prevention and Control, Chongqing 400039, China;
    4. China OceanAipu Oil &
    Gas Testing(Tianjin)Co., Tianjin 300459, China
  • Published:2026-08-12

Abstract: To address the challenges in sealing mechanism and structural optimization of metal hard seals in high-pressure ball valves, a finite element simulation model of the main sealing pair was established. The study analyzed the effects of structural and material parameters on the Mises stress and sealing pressure on the sealing surfaces.Using Box-Behnken experimental design and response surface methodology, mathematical models for seal failure rate and effective contact rate were constructed and subjected to multi-objective optimization.Research findings indicate that the sealing face width, the distance between the sealing face outer diameter and the valve seat outer diameter, and the friction coefficient exert the greatest influence on sealing performance. When these three parameters are set to 14.18 mm, 1.5 mm, and 0.198 respectively, the sealing face failure rate decreases to 6.18%, while the effective contact rate increases to 30.35%. The proposed optimization design significantly enhances the sealing reliability of high-pressure ball valves and provides theoretical guidance for deepwater oil and gas engineering applications.

Key words: underwater test tree, high pressure ball valve, metal hard seal, sealing mechanism and reliability, finite element analysis, optimization

CLC Number: 

  • TB42
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