Seeking advice on the design parameters of spiral grooves in dry gas seals
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I have recently come into contact with dry gas seals, and I am not entirely clear about how to determine the parameters of their spiral grooves, nor about the effects of these parameters on changes in the air film pressure at the end faces and on the stiffness of the seals. I would appreciate advice from those with more experience on whether only fixed, centralized spiral curves such as logarithmic curves should be used.
This is something that remains a technical secret among all sealing manufacturers; how could they tell you?
This is something that remains a technical secret among all sealing manufacturers; how could they tell you?
This is something that remains a technical secret among all sealing manufacturers; how could they tell you?
This is determined through qualitative software analysis followed by experimental validation; the commonly used curve is a helix, and the parameters that need to be determined include the helix angle, groove depth, bottom diameter of the groove, number of grooves, and the inner and outer diameters of the end faces.