Membrane pressure coefficient (back pressure coefficient) in mechanical seal applications-

Membrane pressure coefficient (back pressure coefficient) in mechanical seal applications

　2017-07-14　　

Membrane pressure coefficient (back pressure coefficient) in mechanical seal applications:

Membrane pressure coefficient (back pressure coefficient): The membrane pressure coefficient of a mechanical seal can be defined as: the ratio of the average membrane pressure of the fluid film between the seal end faces to the sealing fluid pressure (both are gauge pressures), reflecting the mechanical seal The bearing capacity of the fluid film between the end faces under the action of the pressure difference of the sealed fluid can be expressed by the following formula

For mechanical seals with different sealing surface contact types (liquid phase parallel surface, gas phase parallel surface, gas-liquid mixed phase parallel surface, convergent cone surface, diffuse cone surface, inclined surface), the expression of film pressure coefficient is different . For example, the film pressure coefficient of the tapered mechanical seal mainly depends on the ratio of the inner and outer gaps of the sealing surface, while the film pressure coefficient of the inclined mechanical seal mainly depends on the ratio of the inner and outer radius of the sealing surface.

M7N mechanical seal 　　533.html,

The average fluid film pressure in mechanical seal applications 　　 the closing force and opening force of the mechanical seal