Non-contact gas lubricated mechanical seals use

When discussing the mechanical seal, the most important thing is to figure out the differences between various sealing systems. Mechanical seals are three basic types: fluid lubricated mechanical seals, gas lubricated mechanical seals and touch off style or called non-contact gas lubricated mechanical seals.
These types of mechanical seals difference is in the fluid-lubricated sliding surface of the seal between the fluids. These seals are usually applied mixed friction purpose mixer. For dry running seals, two sliding surfaces in direct contact with each other. On the other hand, the non-contact gas-lubricated mechanical seals, in the operation of the sliding surface is not in direct contact. There are 1 ~ 5μm wide gap separating the surface, which is why this is often referred to as the seal seals from seal causes. When referred to the gas damping double seals should have this distinction. Here we will discuss only non-contact gas lubricated mechanical gas plastic truck seals.
No-contact gas lubricated mechanical seals is how to work it?
In operation, the gas-lubricated mechanical security seals without contact between the sliding surfaces of the two should be a layer of only a few voids Xie meter, in order to produce voids, non-contact type mechanical seal of the two sliding surfaces disengage one another . To achieve this, a three-dimensional ring groove made to ensure that the air is static and dynamic play. Seal in the stuffing box pressure difference generated at the aerostatic effect, while the aerodynamic effects generated by the rotation. The resulting force balance lift and closed, thereby forming a width of 1 to 5 Xie seal gap.