V-Coupling is used as a mechanical fastener to connect the turbine housing and the bearing housing in a turbocharger. The back plate is located between the turbine housing and the bearing housing, which is compressed by the bolt clamping force of coupling to prevent gas leakage under turbocharger operation. This paper presents the theoretical and analytical methods to predict the sealing performance by calculating the contact pressures on the back plate. The mathematical model was constructed to derive the contact force on the back plate by considering the force transfer mechanism. And, finite element analysis was carried out to predict the contact pressures by applying the bolt load in the coupling system. As a result, the analysis results of the mathematical model are well consistent with the results of the finite element analysis. Therefore, in the early design stage of turbocharger coupling, mathematical model would be helpful to determine the design parameters.

ABSTRACT
 기호설명
 1. 서 론
 2. 커플링 체결부의 수학적 모델
  2.1 커플링 체결계의 작동원리
  2.2 커플링 체결부의 수학적 모델구성
 3. 해석결과
  3.1 수학적 모델에 의한 접촉면압
  3.2 유한요소 해석결과와 이론 해와의 비교
 4. 결 론
 References

• 홍성기(Keyyang Precision R&D Center) | S. K. HONG
• 최복록(Gangneung-Wonju National University School of Mechanical & Automotive Engineering) | B. L. CHOI Corresponding Author