The sealing principle of metal wound gasket?
Sealing gasket: metal winding principle of the sealing surface when the pressure load, to produce compressive stress, can improve the sealing contact surface, when the stress increases enough to cause the surface of the plastic deformation obviously, it can fill the gap seal cover, plug leakage channel. The purpose of using the gasket is to use the gasket material to produce plastic deformation characteristics under the action of compaction load so as to fill the small and uneven surface of the flange sealing surface so as to realize the sealing.Leakage is the phenomenon that the medium enters the limited space from the outside of the inner space of the limited space or from the outside. This is what people do not want to happen. The medium flows through the interface between the inside and outside spaces, i.e., leaks occur on the sealing surface. The root cause of the leakage is that there is a gap in the contact surface, and the pressure difference and the concentration difference on both sides of the contact surface are the driving force of the leakage. Because of the sealing surface form and processing accuracy and other factors, the sealing surface of the gap is unavoidable, which will cause the sealing surface is not completely consistent, resulting in leakage.In order to reduce the leakage, it is necessary to make the contact surface to be fitted to the maximum extent, that is to reduce the cross-sectional area of the leakage passage and to increase the leakage resistance, and to make it larger than the leakage force. In the bolt flange gasket connection, the force of the gasket causes deformation of the gasket material so as to fill the gap between the flange sealing surfaces. The magnitude of its pretension depends on the number of bolts, the torque of the tightening bolt, the lubrication state of the bolt system, and the compression area of the gasket.
The metal winding gasket is made of alloy, strip or stainless steel strip. It is made of graphite, asbestos and Teflon as filling material, and is made of "V" or "W" spiral spiral winding. The utility model has the advantages of high mechanical strength, convenient use, good resilience and elasticity, and is more suitable for application in severe temperature alternating occasions.Strictly speaking, it does not have any special sealing principle. It is the same as other common rubber gaskets, but only the raw materials are used. The occasion used is different from those of other gaskets
Sealing principle of metal wound gasket:The sealing surface when the pressure load, to produce compressive stress, can improve the sealing contact surface, when the stress increases enough to cause the surface of the plastic deformation obviously, it can fill the gap seal cover, plug leakage channel. The purpose of using metal wound gasket is to use the gasket material to produce plastic deformation easily under the action of pressing load, so that it can fill up the tiny and uneven surface of the sealing surface and realize the sealing.Extension of knowledge point:Metal wound gasket is a sealing gasket is used widely at present, in order to return to the best elastic gasket semi metallic gasket, by V or W shaped steel strips with various fillers alternately wound together, high temperature, high pressure and adapt to the use of ultra low temperature or under vacuum conditions, by changing the gasket combination of materials, can solve the problem of all kinds of chemical corrosion medium on the gasket, the structure density can according to different requirements to lock force production.
