Pre-tightening optimization method of bolt connecting component

Abstract

The invention provides a pre-tightening optimization method of a bolt connecting component. The bolt connecting component comprises two connecting pieces, the two connecting pieces are fixedly connected with each other through a bolt component, a flexible graphite metal wave gear composite gasket is arranged between the contact surfaces of the two connecting pieces, wherein the pre-tightening force of a bolt affected by negative elastic interaction is corrected by a correction factor in the process of tightening the connecting pieces through the bolt. According to the pre-tightening optimization method disclosed by the invention, the bolt force obtained by the bolt after every round of loading is finished is close to the target bolt force and is in concentrated distribution, and the inner side and the outer side of the gasket can obtain uniform contact stress.

Description

technical field [0001] The invention relates to a preload optimization method of a bolt connection assembly, in particular to a preload optimization method for correcting the preload of a flange connection system using a flexible graphite metal corrugated tooth composite gasket. Background technique [0002] The bolted flange connection structure composed of bolts, flanges and gaskets is a static sealing form widely used in the petrochemical industry, and is often used for the sealed connection of pressure vessels, pressure pipes and valves. Survey data show that a large petrochemical company has dozens or even millions of sealing structures. The sealing leakage of the bolt-flange-gasket connection structure not only increases the energy consumption of the device, pollutes the environment, but also directly affects the safe and stable operation of the production equipment and the safety and health of production operators. In recent years, flange sealing failures have caused...

AI Technical Summary

Problems solved by technology

The seal leakage of the bolt-flange-gasket connection structure not only increases the energy consumption of the device, pollutes the environment, but also directly affects the safe and stable operation of the production equipment and the safety and health of production operators

In recent years, flange sealing failures have caused many serious accidents. For example, flange sealing failures frequently occurred in S-Zorb units of petrochemical enterprises such as Yanshan Petrochemical, Qilu Petrochemical, Tianjin Petrochemical, etc., resulting in fire accidents, equipment shutdowns, and serious economic losses.

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