The working principle of mechanical seals mainly depends on a pair or pair of end surfaces that are perpendicular to the axis and relatively sliding. These faces are kept under the action of fluid pressure and compensation mechanism. The purpose of fluid leakage. The mechanical seal is composed of dynamic ring, static ring, dynamic ring sealing ring, static ring sealing ring, spring, transmission seat, etc.
The dynamic ring is installed on the dynamic ring seat at the same time as the shaft, and the static ring is installed on the static ring of the pump body, which is the static part. There is a layer of water film between the axial sealing end of the dynamic ring and the static ring, which plays the effect of cooling and lubricating end surface. When the pump is running, the friction effect of the two sealing end faces causes the liquid in the sealing cavity to heat up. In order to prevent vaporization, the system design has the heat from the heat generated by the circulating solution in time. The circulating fluid is designed to generate the internal cycle by designing a pumping form to generate a pumping form. The discharged liquid enters the external cooler.
Mechanical seals have the purpose of preventing leakage of a fluid (liquid or gaseous) through the clearance between a shaft and the fluid container. The main components of a mechanical seal are the seal rings on which a mechanical force is acting, generated by springs or bellows , and an hydraulic force, generated by the process fluid pressure. The seal ring which rotates with the shaft is called the "rotary ring" ; the seal ring fixed on the casing of the machinery is called the "stationary ring". Secondary seals are required to perform static sealing between rotary rings and shafts and also between stationary rings and the casing of the machinery.
The structure of the mechanical seal includes basic components such as end surface sealing friction, buffer compensation and tight mechanism, auxiliary sealing (second -level sealing deflection element), and transmission mechanism. Among them, elastic elements (such as springs, ripples) play a role of pre-tightening, compensation and buffering, and requires always maintaining sufficient flexibility to overcome the inertia of the auxiliary sealing and the friction of the drive and the dynamic ring. Follow the followability of the dynamic ring. Auxiliary sealing mainly seal the sealing effect of static and dynamic rings. To ensure the sealing between the static ring and the cover cover, the sealing element of the moving ring can ensure the sealing of the dynamic ring and the axis or axis cover and the floatability of the dynamic ring.
In general, the mechanical seal is closely exposed through precisely processing end surfaces, using fluid pressure and compensation agency's elasticity (or magnetic force) and auxiliary sealing to effectively prevent fluid leakage. At the same time, cooling and lubricating through circulating fluid during operation are cooled. , Ensure the normal operation and long-term stability of the equipment.
