This paper develops a flow control block for a hydraulic system of a tunnel boring machine. The flow control block is a necessary component to ensure stability in the operation of the hydraulic system. In order to know the pressure distribution of the flow control block, the flow analysis was performed using the ANSYS-CFX. It was confirmed that the pressure and flow rate were normally supplied to the hydraulic system even if one of the four ports of the flow control block was not operated. In order to evaluate the structural stability of the flow control block, structural analysis was performed using the ANSYS WORKBENCH. As a result, the safety factor of the flow control block is 1.54 and the structural stability is secured.

ABSTRACT
 1. 서 론
 2. 유량 제어 블록의 구조
 3. 유량 제어 블록의 유동해석
  3.1 지배방정식
  3.2 격자생성 및 경계조건
  3.3 해석 변수
  3.4 유동해석 결과
 4. 유량 제어 블록의 구조해석
  4.1 유한요소 모델 및 하중조건
  4.2 구조해석 결과
 5. 결 론
 References

• 이재동(President Hipower Hydraulic Co. Ltd.) | Jae-Dong Lee Corresponding Author
• 임상진(Deputy General Manager Hipower Hydraulic Co. Ltd.) | Sang-Jin Lim