Spiralc Computational Analysis of Spirally Grooved
Gas Face Seals
COST: $5,000 (Executable + )GUI
SPIRAL GROOVE FACE SEAL OPERATION
Spiral groove face seals (SGFS) offer numerous advantages over conventional
non contacting mechanical seals. Grooves etched on the mating ring of the
sealing surfaces do not wear from contact while rotating, greatly lessening the
need to overhaul machines for seal replacement. Dry (gas lubricated) operation
allows the face seal to perform with less complicated and expensive external
support systems like those required for oil lubricated seals. The use of tandem
and double sealing arrangements with inert buffer gases allow application of
the SGFS in machines handling highly volatile process fluids with virtually
zero leakage to the atmosphere.
Numerical Method of Solution:
Finite Elements
PROGRAM FEATURES
The program
calculates the static load and dynamic axial force coefficients for gas spiral
grooved face seals (SGFSs).
Configurations: Grooved stationary or rotating surface.
Seal dams inside the
Geometry: (See Figures 1.) I.D., O.D., grooved ID, grooved O.D., ridge
clearance, groove depth
Number of grooves: 1 < Ng
< 30
Groove (helix) angle: (Radial grooves b = 90°)
Specified Boundary conditions: I.D. Pressure &
O.D. Pressure, or no I.D. flow (thrust bearing).
Fluid: Viscosity, density
Spiral calculates:
Limitations and Restrictions:
Laminar flow, isothermal flow with isoviscous, compressible fluids
without fluid inertia effects
PROGRAM OPERATION
Input: ExcelŽ GUI
Output: ExcelŽ GUI
Language: Fortran90. Source code NOT
provided.