Date of Publication:2022-10-10

Journal:科学技术与工程

Affiliation of Author(s):化工学院

Issue:19

Page Number:137-141

ISSN No.:1671-1815

Abstract:The gaskets,as the key of long-term sealing for flanges,its different types can make a significant impact on the elastic interaction between bolts.Metal graphite spiral wound gasket and PTFE gasket were selected,used finite element numerical simulation method,study the elastic interaction with the inside diameter of gaskets for 100 mm,110 mm,120 mm,134 mm under sequence and cross load mode between bolts.DN100 PN40 flange experimental device was established and the accuracy of the model was verified.Simulation results show that with the increasing of the inside diameter of gaskets,the bolt load will change significantly,the elastic interaction types of positive and negative for some bolts will change,and the elastic interaction intensity of positive and negative effects will gradually reduce.Compared with metal graphite spiral wound gasket,the bolt load fluctuations and elastic interaction intensity fluctuations are more intense caused by PTFE gasket.Under the condition which two types′ gaskets are applicable,the metal graphite spiral wound gasket with large inside diameter can achieve a better sealing effect under sequence load mode.

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