I. sealing principle of graphite sealing ring.

Graphite sealing ring is a kind of seal made of graphite, which is widely used in all kinds of industrial equipment under high temperature, high pressure and strong corrosive medium. The sealing principle is mainly based on the action of elastic deformation and contact force, which can be summarized as follows:

1. Elastic deformation.

The elastic deformation of graphite sealing ring is the prerequisite to realize the sealing effect. When the graphite sealing ring is subjected to the pre-tightening force during assembly, its interior will appear elastic deformation, so that it will be in close contact with the equipment wall. Moreover, because of its good elastic deformation ability, graphite sealing ring has good self-adaptability, even in the case of small irregular shape and inconsistent surface roughness on the wall of the equipment. Graphite sealing ring can also play a good sealing effect.

two。. Contact force.

The contact force of graphite sealing ring is one of the key factors to realize the sealing effect. The contact force of graphite sealing ring mainly comes from the properties of the material and the factors of structural design. First of all, the graphite sealing ring has good plasticity and compressibility, which can produce enough contact force to ensure the full contact with the equipment wall; secondly, the structural design of the graphite sealing ring is also directly related to the size of the contact force. for example, the cross-section shape, cross-section width and pre-tightening force of the graphite sealing ring will affect the contact force.

3. Thermal expansion.

The thermal expansion of graphite sealing ring is also one of the keys to maintain its sealing effect. As the graphite sealing ring material itself has a certain thermal expansion performance, with the increase of the temperature of the equipment in the working process, the graphite sealing ring will also expand, so as to ensure the continuity and stability of the sealing effect.

Second, the application scene of graphite sealing ring.

Graphite sealing ring has the characteristics of good sealing performance, high temperature resistance and corrosion resistance, so it is widely used in all kinds of industrial equipment under high temperature, high pressure and strong corrosive medium. For example, graphite sealing ring is often used in equipment in petroleum, chemical, metallurgical, electric power, light industry and other industries, such as compressors, reaction cauldrons, pumps and other equipment. In addition, the graphite sealing ring can also be used in some occasions with high requirements for environmental protection.

[conclusion].

The sealing principle of graphite sealing ring is based on elastic deformation and contact force. It has good sealing performance, high temperature resistance, corrosion resistance and other characteristics, and is widely used in a variety of industrial equipment under high temperature, high pressure and strong corrosive medium. The seal has a wide application prospect in industrial production and environmental protection.