A Development of CAD Program for Metal Bellows Diaphragm

금속 벨로우즈 Diaphragm용 CAD 프로그램 개발

  • 조해용 (충북대학교 기계공학부) ;
  • 남기정 (충북대학교 대학원) ;
  • 오병기 (충북대학교 대학원) ;
  • 김영훈 (충북대학교 대학원) ;
  • 이제훈 (한국기계연구원 레이저 기술그룹) ;
  • 서정 (한국기계연구원 레이저 기술그룹)
  • Published : 2003.03.01


A CAD program for metal bellows diaphragm was developed in this study. This program was written in AutoLISP on the AutoCAD system with a personal computer. Basic design concept used in this program is composition of a convolution that is tangent to two lines and 5 circles from given design parameters(initial radius, inner and outer diameter, thickness, pitch, etc.). The effects of altering some design parameters on stress distribution and fatigue life of bellows were estimated using commercial FEM code, NISAII. As a result, the metal bellows diaphragm was successfully designed by the CAD program. It is used to model a bellows geometry in pre-processor of FEM code. The FEM result shows that stress is dependent on straight line length, bellows diameter with same span, and fatigue life is also affected by design parameters.


Metal Bellows;Mechanical Seal;Diaphragm Design


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