Double-end-face mechanical seal with H-shaped plugging cavity

Abstract

The invention provides a double-end-face mechanical seal with an H-shaped plugging cavity. As shown in the figure, the structure with the H-shaped plugging cavity 6 is formed by a shaft sleeve 1, a front end moving ring structure 2, a front end fixed ring 3, a sealing sleeve 5, a rear end fixed ring 7, a rear end moving ring structure 12, a pressing cover 11, auxiliary sealing elements 4, 8 and 10 and the like, thus, concave moving sealing structures of the front end face sealing face Q, the rear end face sealing face H and the radial ring-shaped sealing face J are formed, and therefore the double-end-face mechanical seal with the H-shaped plugging cavity can achieve zero leakage when an oil sealing system is not used, and long service life and safety operation can be achieved.

Description

Technical field [0001] The invention relates to a mechanical seal, in particular to a double-end mechanical seal with an I-shaped sealing cavity. Background technique [0002] With the increasingly stringent requirements for environmental protection, in order to meet these requirements in the petrochemical industry, higher requirements have been put forward for mechanical seals used on equipment that transports toxic, hazardous, high temperature, flammable and explosive media, that is, to use The double end face mechanical seal is also equipped with an oil sealing system to ensure that the sealed medium does not leak, that is, to achieve zero leakage, and it can also be safe, reliable and long-life operation. The so-called oil sealing system is usually composed of a sealing oil tank, a sealing oil pump, a sealing oil circulation pipeline, etc. to provide a system for sealing oil. The so-called zero leakage means that the sealing oil pressure is slightly higher than the pressure o...

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Problems solved by technology

The so-called oil sealing system is usually composed of a sealing oil tank, an oil sealing pump, and an oil sealing circulation pipeline to provide an oil sealing system. The so-called zero leakage means that the sealing oil pressure is slightly higher than the pressure of the sealed medium to prevent the sealed medium Leakage, and a small amount of sealing oil leakage is allowed, which not only increases the cost of mechanical seal operation, but also increases the reliability requirements of the sealing oil system. The sealing oil system is unreliable, and it is also difficult to guarantee safe production. The system can also make the double-end mechanical seal achieve zero leakage, safe, reliable, and long-life operation. This is undoubtedly an important issue to be solved by mechanical seal technology

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