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17
2020
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09
Working principle of internal high pressure seal
The working principle of internal high pressure seal, pressure vessel must be developed with a good sealing system performance. Is mainly used for flammable, explosive, toxic media pressure vessel
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Internal high pressure sealRefers to the sealing technology used to control the working conditions of high-pressure systems. China's high-pressure and high-temperature environment and the special educational factors of working pressure and temperature fluctuations make high-pressure equipment sealing more difficult than medium and low-pressure sealing. In terms of seal design principles and structural development, the main research features of high-pressure seals are:
1. Adopting metal washers to improve the high temperature and high sealing ratio. The gasket material shall be annealed aluminum, annealed copper or mild steel with good ductility;
2, the use of narrow sealing surface, some even close to the line seal, the gasket is close to the inner wall of the cylinder, can obtain a higher sealing pressure and reduce the calculation of preload;
3. In order to reduce the size of the sealing structure, the end flange structure is mostly used, that is, embedded in the end of the thickened cylinder pressure bolt called the main bolt;
4. Reach using medium pressure from the close seal.Internal high pressure sealThe sealing force of the piece is also similar to the use of low-pressure sealing, I .e. relying on the fastener to achieve the preload compression of the gasket, the seal during operation, the flat seal, the seal castle. When high sealing requirements, the use of self-sealing, pressure medium gasket depends on the proposition to provide instant work, the higher the working pressure, the greater the sealing force.
Internal high pressure sealThe working principle of the pressure vessel must be developed to have a good sealing system performance. It is a pressure vessel mainly used for flammable, explosive and toxic media. If the sealing is not good, flammable, explosive and toxic media leak out, the production will be affected by society, and the personal and property safety of technical personnel through operation will also be seriously threatened. Environmental problems will continue to be polluted by enterprises. Internal high-pressure seal is a very important aspect of high-pressure vessel design. Whether the high-pressure vessel can operate normally and economically depends to a large extent on the improvement of the sealing structure. In recent years, high-pressure vessels have been more and more widely used, and more new requirements have been put forward for the sealing structure, and the reliability of its sealing is also getting higher and higher.
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