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Performance analysis of auxiliary O‑ring for mechanical seals in 15 MPa high‑pressure pumps
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Yongle WANG1, 4, Da XU2, Siyun DING1, 3, Xing XIE1, 4, Yuehua CAI4, 5, Qian PENG3, 5, Zhaoshan WU1
Fluid Machinery | 2025, 53(8) : 94 - 101
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Fluid Machinery | 2025, 53(8): 94-101
Performance analysis of auxiliary O‑ring for mechanical seals in 15 MPa high‑pressure pumps
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Yongle WANG1, 4, Da XU2, Siyun DING1, 3, Xing XIE1, 4, Yuehua CAI4, 5, Qian PENG3, 5, Zhaoshan WU1
Affiliations
  • 1Hefei General Machinery Research Institute Co.，Ltd.，Hefei 230031，China
  • 2Kunming Branch of the 705 Research Institute，China State Shipbuilding Corporation Limited，Kunming 650032，China
  • 3Sinomach General Machinery Science & Technology Co.，Ltd.，Hefei 230088，China
  • 4National General Machinery and Basic Component Innovation Center，Hefei 230031，China
  • 5Advanced Sealing Technology Innovation Center，Hefei 230031，China
Published: 2025-08-30 doi: 10.3969/j.issn.1005-0329.2025.08.012
Outline
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To investigate the sealing performance of the auxiliary rubber O‑ring for the compensating ring in high‑pressure pump mechanical seals，a two‑dimensional axisymmetric nonlinear contact model was established.Based on the fluid pressure penetration method，the effects of parameters such as different medium pressures，compression ratios，and installation gaps on the stress and sealing performance of the O‑ring were analyzed.The accuracy of the computational model was verified through an O‑ring axial force measurement test apparatus.The results show that the various stresses of the O‑ring increase with rising medium pressure，with contact stress exhibiting the most significant increase；when the medium pressure is in the range of 9~15 MPa，the pressure dominates the influence on O‑ring stress；when the compression ratio is >10%，its effect on O‑ring stress becomes negligible；when the medium pressure is below 20 MPa and the installation gap is <0.2 mm，the installation of the backup ring has little effect on the stress and sealing performance of the O‑ring.The research results can provide theoretical guidance for the design of rubber O‑rings in related high‑pressure pump mechanical seals.

high‑pressure mechanical seal  /  rubber O‑ring  /  fluid pressure penetration  /  finite element analysis  /  test verification
王永乐, 许达, 丁思云, 谢星, 蔡粤华, 彭骞, 吴兆山. 15 MPa高压泵用机械密封辅助O形圈性能分析. 流体机械, 2025 , 53 (8) : 94 -101 . DOI: 10.3969/j.issn.1005-0329.2025.08.012
Yongle WANG, Da XU, Siyun DING, Xing XIE, Yuehua CAI, Qian PENG, Zhaoshan WU. Performance analysis of auxiliary O‑ring for mechanical seals in 15 MPa high‑pressure pumps[J]. Fluid Machinery, 2025 , 53 (8) : 94 -101 . DOI: 10.3969/j.issn.1005-0329.2025.08.012
Appendix
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Year 2025 volume 53 Issue 8
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Article Info
doi: 10.3969/j.issn.1005-0329.2025.08.012
  • Receive Date：2024-11-05
  • Online Date：2026-10-20
  • Published：2025-08-30
Article Data
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History
  • Received：2024-11-05
  • Revised：2025-03-17
Affiliations
    1Hefei General Machinery Research Institute Co.，Ltd.，Hefei 230031，China
    2Kunming Branch of the 705 Research Institute，China State Shipbuilding Corporation Limited，Kunming 650032，China
    3Sinomach General Machinery Science & Technology Co.，Ltd.，Hefei 230088，China
    4National General Machinery and Basic Component Innovation Center，Hefei 230031，China
    5Advanced Sealing Technology Innovation Center，Hefei 230031，China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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