流体机械
流體機械
류체궤계
Fluid Machinery
2015年
10期
11-15
,共5页
垫片%密封%厚度%ePTFE
墊片%密封%厚度%ePTFE
점편%밀봉%후도%ePTFE
gasket%sealing%thickness%ePTFE
对膨体聚四氟乙烯（ePTFE）密封垫片的主要性能进行了试验研究，分析了厚度对性能的影响规律，并探讨了ePTFE 的蠕变行为与密封性能的关系。结果表明：由于 ePTFE 内部膜界面的影响，最大拉伸强度、蠕变性能和密封性能都受材料厚度的显著影响；ePTFE 垫片的泄漏方式以界面泄漏为主，本体渗漏仅占10％左右；基于蠕变和泄漏率的关系，发现特征松弛时间τ可以作为评价 ePTFE 密封性能的一个重要参数。
對膨體聚四氟乙烯（ePTFE）密封墊片的主要性能進行瞭試驗研究，分析瞭厚度對性能的影響規律，併探討瞭ePTFE 的蠕變行為與密封性能的關繫。結果錶明：由于 ePTFE 內部膜界麵的影響，最大拉伸彊度、蠕變性能和密封性能都受材料厚度的顯著影響；ePTFE 墊片的洩漏方式以界麵洩漏為主，本體滲漏僅佔10％左右；基于蠕變和洩漏率的關繫，髮現特徵鬆弛時間τ可以作為評價 ePTFE 密封性能的一箇重要參數。
대팽체취사불을희（ePTFE）밀봉점편적주요성능진행료시험연구，분석료후도대성능적영향규률，병탐토료ePTFE 적연변행위여밀봉성능적관계。결과표명：유우 ePTFE 내부막계면적영향，최대랍신강도、연변성능화밀봉성능도수재료후도적현저영향；ePTFE 점편적설루방식이계면설루위주，본체삼루부점10％좌우；기우연변화설루솔적관계，발현특정송이시간τ가이작위평개 ePTFE 밀봉성능적일개중요삼수。
The main performance of expanded polytetrafluoroethylene (ePTFE)gasket was studied by experiment.The effect of thickness on performance is analyzed and the relationship between creep performance and sealing performance is investigated.The results indicate that ultimate tensile stress,creep performance and sealing performance are significantly affected by the material thickness due to the impact of ePTFE membrane interface.The main leak way of ePTFE gasket is interface leak and only about 10 percent of leak is penetration leak.Based on the relationship between creep and leak rate,the characteristic relaxation time τcan be used as an sealing performance evaluation parameter of ePTFE.
