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Leakage Characteristics of Gas Screw Seals
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English
Abstract
Leakage characteristics of the screw gas seal having a rectangular screw groove on a shaft were investigated by varying the peripheral velocity up to 250 m/s and by using room temperature air.
The various effects of helix angle, groove width ratio, aspect ratio, number of threads, etc, were examined both in stationary and rotating states.
As a result, it was found that the seal performance was optimized by using a dimensionless parameter, the ratio of the cross-sectional areas of screw groove to screw rotor. Thus, the seal performance was optimized when this parameter was nearly equal to 1 × 10-3 or when the cross-sectional area of screw groove became nearly 0.1% of the cross-sectional area of screw rotor. The effects of aspect ratio, helix angle, groove width ratio and number of threads on the seal performance appear to be relatively unimportant.
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Authors
Citation
Miyake, K., Watanabe, E., and Ariga, I., "Leakage Characteristics of Gas Screw Seals," SAE Technical Paper 861836, 1986, https://doi.org/10.4271/861836.Also In
References
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