Selection of spring specific pressure in mechanical seal engineering application-

Selection of spring specific pressure in mechanical seal engineering application

　2017-07-14　　

Selection of spring specific pressure in mechanical seal engineering application:

Spring specific pressure: refers to the elastic force on the unit sealing surface, the unit is MPa. The calculation method is the total spring force F divided by the area A of the sealing ring. which is:

In practice, the value of spring force F is limited, and its minimum value is governed by two factors. First, the maximum resistance of the auxiliary seal must be overcome, otherwise the seal end face will open, resulting in excessive leakage. When the compensation ring 'hangs' on the shaft deposits or there is excessive axial displacement during shutdown cooling (or heating up), the auxiliary seal friction may be too high; second, when the end face of the non-compensation ring is not perpendicular to the axis and When the fluid pressure is low, the elastic element must be able to overcome the axial inertial force to keep the seal end faces separated. According to the area of u200bu200bthe seal end face, the spring specific pressure is usually 0.1~0.2MPa. The appropriate spring can be selected according to Table 1-8 in the project. Specific pressure.

Table 1-8 Selection of spring specific pressure in the project

Sealing fluid pressure The specific pressure P refers to the force applied by the fluid pressure on the unit sealing surface to close the sealing end surface. The calculation formula is

LB500 mechanical seal 　　531.html,

Schematic diagram of axial force balance analysis of mechanical seal friction pair 　　 Average fluid film pressure in mechanical seal application