• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
深部煤矿保压取心保压控制器密封性能分析与结构优化
  • Title

    Sealing performance analysis and structure optimization of pressure-preserved controller for pressure-preserved coring in deep coal mine

  • 作者

    王天宇李佳南张益玮李炬谢和平

  • Author

    WANG Tianyu;LI Jianan;ZHANG Yiwei;LI Ju;XIE Heping

  • 单位

    四川大学 水利水电学院四川大学 机械工程学院深圳大学 深地科学与绿色能源研究院

  • Organization
    College of Water Resources and Hydropower, Sichuan University
    College of Mechanical Engineering, Sichuan University
    Institute of Deep Earth Science and Green Energy, Shenzhen University
  • 摘要

    保压控制器作为深部煤炭原位保压取心器的核心部件,其密封设计对保压取心效果有着决定性作用。为了获取最优的密封结构方案,本文建立了保压控制器密封结构二维轴对称非线性接触模型,通过正交试验分析不同凹槽设计、锥角选型及摩擦因数对密封性能的影响,并研究不同闭合阶段、介质压力下密封圈各应力变化情况。结果表明:1.9 mm凹槽深度的30°锥角保压控制器密封效果最优;摩擦因数对密封性能的影响较小,应根据实际情况选择尽可能小的摩擦因数;室内打压试验结果表明保压控制器在较小预紧力作用下即可形成密封,且其密封性能随密封压力的升高仍维持稳定,该自适应密封特性保证了其密封能力与工作稳定性。研究成果提高了深部煤矿保压保瓦斯取心器的密封可靠性,对实现深部煤矿瓦斯精准测定具有重要工程意义。

  • Abstract

    As the pressure-preserved controller is a core component of the deep coal in-situ pressure-preserved coring device, its sealing design plays a decisive role in the effect of pressure-preserved coring. In order to obtain the optimal sealing structure, a two-dimensional axisymmetric nonlinear contact model was established for the sealing structure of the pressure-preserved controller. On this basis, the effects of different groove design, cone angle selection and friction coefficient on the sealing performance were analyzed by orthogonal test method. Meanwhile, the stress changes of the sealing ring under different closing stages and medium pressures were studied. The results show that: the pressure-preserved controller with 1.9 mm groove depth and 30° cone angle has the best sealing effect. The friction coefficient has little effect on the sealing performance, and it should be as small as possible according to the actual situation. The results of laboratory pressure test show that the pressure-preserved controller can form a seal under the action of a small preload, and its sealing performance remains stable with the increase of sealing pressure. The adaptive sealing characteristics ensure its sealing ability and working stability. The research results improve the sealing reliability of the pressure- and gas-preserved coring device in deep coal mines, which is of great engineering significance for the accurate determination of gas in deep coal mines.

  • 关键词

    保压控制器保压取心密封性能结构优化

  • KeyWords

    pressure-preserved controller;pressure-preserved coring;sealing performance;structural optimization

  • 基金项目(Foundation)
    国家自然科学基金面上项目(52274133);国家重大科研仪器研制项目(51827901);国家重点研发计划项目(2022YFB3706604)
  • DOI
  • 引用格式
    王天宇,李佳南,张益玮,等. 深部煤矿保压取心保压控制器密封性能分析与结构优化[J]. 煤田地质与勘探,2023,51(8):88−97.
  • Citation
    WANG Tianyu,LI Jianan,ZHANG Yiwei,et al. Sealing performance analysis and structure optimization of pressure-preserved controller for pressure-preserved coring in deep coal mine[J]. Coal Geology & Exploration,2023,51(8):88−97.
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