Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Design of Cam Contour for Constant Hangers

등하중지지대의 캠 윤곽 설계

  • Lee, Gun-Myung (School of Mechanical and Aerospace Engineering, Engineering Research Institute, Gyeongsang Nat'l Univ.) ;
  • Park, Mun-Soo (Jinju Campus, Korea Polytechnic VII College)
  • 이건명 (경상대학교 기계항공공학부) ;
  • 박문수 (한국폴리텍VII대학 진주캠퍼스)
  • Received : 2010.08.13
  • Accepted : 2011.03.04
  • Published : 2011.06.01
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Abstract

A constant hanger is a device for supporting pipes in plants. It supplies a constant force to a supporting pipe even if the pipe moves because of thermal expansion. In this paper, we propose a method for designing the contour of a cam for a constant hanger. It has been shown that the contour of a cam must satisfy the geometrical relation of the cam, the force balance equation for the load tube, the relation between the side spring compression and the cam rotation angle, and the moment balance equation for the cam. A calculation procedure to solve these equations simultaneously is proposed, and a constant hanger is designed successfully.

등하중지지대는 플랜트의 배관을 지지하는 장치로서 열팽창으로 인하여 배관이 움직이더라도 배관에 일정한 힘을 제공하는 역할을 한다. 본 논문에서는 등하중지지대의 캠 윤곽을 설계하는 방법을 제안하였다. 캠의 윤곽은 캠의 기하학적 관계식, 부하 튜브의 힘 평형식, 보조스프링의 압축력과 캠의 회전각 사이의 관계식, 그리고 캠의 모멘트 평형식을 만족하여야 함을 보였고, 이 방정식들을 연립하여 푸는 계산 과정을 제안하였다. 이 계산 과정을 사용하여 요구하는 조건을 만족하는 등하중지지대의 캠을 설계하였다.

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References

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