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The Thermo —Mechanical Analysis of Mechanical Packing (SEAL), Using Finite Element Method (FEM) — Results and Conclusions

Excerpt

Using computer software “Solid Works” for generate the geometric form of the seal's rings and “ANSYS-9 WORKBENCH” program for the FEM analysis to calculate mechanical stresses and thermal loadings of a mechanical seals as a part of the centrifugal pumps working in an oil refinery.

The goal of this analysis is to improve the design of the seal. The analysis was performed for the mechanical seals of the 100P3A and 100P3R pumps of an oil refinery.

Two “scenarios” was considered; each them is an “engineering” simulation. To define the simulations we considered as known: the type of material and the material properties; the behavior of the contact surface of rings; the types and the magnitude of the loadings on the ring. As a variable are considered the geometric shape of the rings and loadings. Type of the material of sliding rings: silicon carbide/graphite.

For the Scenario No.1, the two sliding rings of the mechanical packing resist to compression stress in the normal running conditions (work in the presence of auxiliary liquid). The two sliding rings resists even in the damage conditions (in the absence of the auxiliary liquid), like we can see in the Scenario No.2.

The equivalent stress (Von Misses) had a maximum value in the silicon carbide ring for the both scenarios. The maximum strain (deformation) is in the graphite ring, in the both scenarios and it is 1,3 times greater in the scenario No. 2 (damage running conditions).

  • Abstract
  • Keywords
  • Introduction
  • Experimental Research
  • Solutions
  • Conclusions
  • References

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