Predicting method of leakage rate of bolted flange connection structure with anti-loosing washer

Abstract

The invention relates to a predicting method of the leakage rate of a bolted flange connection structure with an anti-loosing washer. Aiming at the defect that the leakage rate of the prior bolted flange connection structure with the anti-loosing washer can not be predicted, by establishing the deformation compatibility equation of the bolted flange connection with the anti-loosing washer and calculating the pretightening force and the working stress of a gasket, and according to the tightness principle, the predicting method of the leakage rate of the bolted flange connection structure with the anti-loosing washer is established, so that the prediction of the leakage rate of the connection structure is realized. The predicting method of the invention has simple calculation principle and method and accurate prediction result, and can be widely applied to the prediction and calculation of the leakage rate of the connection structure in the circumstance of high temperature and high pressure and larger fluctuation of temperature and pressure.

Description

technical field [0001] The invention relates to gasket sealing technology, in particular to a method for predicting the leakage rate of a bolted flange connection structure with an anti-loosening washer. Background technique [0002] Bolt flange gasket seals are widely used in equipment and pipeline connections in the process industry. The failure of the connection structure is rarely caused by insufficient strength, and leakage is the main cause of failure. Especially under high temperature conditions, due to the deterioration of the performance of the gasket, coupled with the elongation of the bolt and the deflection of the flange under the combined action of medium pressure and temperature, the compression stress of the gasket caused by the relative separation tendency between the flange sealing surface and the gasket It is more likely to cause the sealing performance of the connection system to decrease or even cause leakage. [0003] In the bolted flange connection sys...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is, aiming at the defect that the leakage rate of the existing bolted flange connection structure with anti-loosening washers cannot be predicted, by establishing the deformation coordination equation of the bolted flange connection with anti-loosening washers and calculating the preload of the gasket and working stress, based on the tightness theory, a method for predicting the leakage rate of the bolted flange connection structure with anti-loosening washers is established, so as to realize the prediction of the leakage rate of the connection structure

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