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Analysis of rotor contact for screw compressors.

Author(s) : KAMEYA H., AOKI M., NOZAWA S.

Type of article: Article

Summary

A reliability evaluation of meshing rotor surfaces needs contact theory on a micro size area. The authors propose a method to evaluate whether a screw compressor rotor has enough contact fatigue strength. The method is based on analyses of three-dimensional curvatures and the Hertz contact pressure. At a contact point one of the principal curvatures directs the rotor's sealing line and this is calculated as the gap distribution. Another perpendicular curvature is calculated with an approximate arc to the rotor profile. As the contact point is an inflection point, the contact condition is first calculated on each side and then composed. Using this method, the authors found the rotors of a typical screw compressor have enough strength. This is because the rotor contact pressure is calculated to be 0.57 times of a contact fatigue strength of the material.

Details

  • Original title: Analysis of rotor contact for screw compressors.
  • Record ID : 2005-1186
  • Languages: English
  • Source: JSME int. J., B - vol. 47 - n. 3
  • Publication date: 2004/08

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