高压大型天然气快开盲板用C形橡胶圈密封性能分析

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1、2015年5月润滑与密封Mav2015第40卷第5期LUBRICAT10NENGINEERINGVo1．40No．5DOI：10．3969／j．issn．0254—0150．2015．05．018高压大型天然气快开盲板用C形橡胶圈密封性能分析石莹陈平周淑敏(北京化工大学机电工程学院北京100029)摘要：针对国内高压大型天然气过滤器快开盲板用c形橡胶密封圈，利用ABAQUS建立其有限元模型，分析密封槽宽度、内压、初始密封间隙、材料硬度、槽口倒角半径、钢圈直径对其性能的影响，得到这些参数的合理取值范围。结果表明：材料硬度对密封圈密封性能的影响较小，密封槽宽度对密封可靠

2、度有一定影响，随密封槽宽度增加，最大接触压力呈下降趋势，密封可靠度有所降低；随着内压的增加，最大接触压力与内压的差值呈增大趋势，密封可靠性增加：随初始密封间隙增加，应力增加，密封可靠度有所降低；密封槽口倒角半径对密封圈剪切破坏的影响较大，倒角半径增大密封圈发生局部剪切破坏的可能性增大；钢圈直径对c形橡胶圈应力应变影响较大，钢圈直径增大，剪切应力呈减小趋势。关键词：c形橡胶圈；接触压力；密封性能；快开盲板中图分类号：TH311；TH136文献标志码：A文章编号：0254—0150(2015)5-089-5SealingPerformanceAnalysisofRubb

3、erC-·ringforHigh--pressureNaturalGasQuick-openingClosureShiYingChenPingZhouShumin(CollegeofMechanicalandElectricalEngineering，BeijingUniversityofChemicalTechnology，Beijing100029，China)Abstract：ThefiniteelementmodelofrubberC-ringusedinthequick—openingblindplateofdomestichigh—pressurenat

4、uralgasfilterwasestablished．Theinfluencesofthesealgroovewidth，internalpressure，initialsealclearance，hardnessofmaterials，notchradius，rimdiameterofsteel—ringonthesealingperformanceofrubberC-ringwereanalyzedbyusingABAQUSsoftware，andthereasonablerangeoftheseparametersweresuggested．Theresul

5、tsshowthatthehardnessofmate—rialshaslittleeffectonsealperformance，whilethesealgroovewidthhasacertainimpactonthesealingreliability，withthesealinggroovewidthincreasing，themaximumcontactpressureisdecreasedandthesealingreliabilityisalsodecreased．Withtheincreaseofinternalpressure，thediffere

6、ncebetweenthemaximumcontactpressureandinternalpressureisin-creased，thesealingreliabilityisincreased．Withtheincreaseofinitialgapseal，thestressisincreasedandthesealingreli—abilityisdecreased．Thesealingnotchchamferradiushaslargeinfluenceontheshearfailureofsealingring，theincreasingofchamfe

7、rradiuswillresultinlargepossibilityofshearfailure．Steel—ringdiameterhaslargeeffectonthestrainandstressofC—shapedrubberring，andheincreasingofsteel—ringdiameterwillresuhinthedecreaseofshearstress．Keywords：rubberC—ring；contactpressure；sealingperformance；quickopeningblindplate由于c形橡胶密封圈可利