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

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on Structural Safety of the Boom Hoisting Cylinder of a Coal Handling Machine

석탄하역기 붐 호이스팅 실린더의 구조 안전성에 관한 연구

  • Choi, Yong Hoon (Dept. of Creative Engineering System, Pusan Nat'l Univ.) ;
  • Kwak, Hyo Seo (Dept. of Creative Engineering System, Pusan Nat'l Univ.) ;
  • Kim, Chul (Research Institute of Mechanical Technology, Pusan Nat'l Univ.)
  • 최용훈 (부산대학교 창의공학시스템학과) ;
  • 곽효서 (부산대학교 창의공학시스템학과) ;
  • 김철 (부산대학교 기계기술연구원)
  • Received : 2015.09.16
  • Accepted : 2015.10.27
  • Published : 2015.12.01
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Abstract

A coal handling machine is a type of equipment used for loading coal, the main material in a steam power plant, along a conveyer belt from a ship, and is placed after the driving chain bucket. However, studies on the boom hoisting cylinder, which is a hydraulic system used to control the angle of the boom based on loading location, indicate that domestic models are insufficient, and are thereby often substituted with a foreign product. In this study, a technique for analyzing the contact pressure in a thick-walled cylinder was established by comparing the contact pressure, which is calculated theoretically based on the results obtained from FEM simulation, and by checking whether the working oil is leaking from the boom hoisting cylinder using a v-seal. In addition, the driving motion was simulated according to the strokes of the cylinder, and the structural stability was verified under the maximum output conditions.

석탄하역기는 화력발전소의 주 원료인 석탄을 체인 버킷을 구동하여 선박으로부터 컨베이어 벨트로 하역하는 장비이다. 그러나 국내에서는 석탄하역기의 하역위치에 따라 붐 각도를 제어하는 유압시스템인 붐 호이스팅 실린더에 대한 연구가 이루어지지 않아, 전량 수입하고 있는 실정이다. 이에 본 연구에서는 두꺼운 실린더에서 접촉면압의 이론 값을 FEM 을 수행하여 얻은 결과 값과 비교하여 접촉면압 해석기법의 타당성을 확립하였고, 이를 통하여 브이 실을 갖는 붐 호이스팅 실린더에서 작동유의 누설 여부 판단과 접촉면압을 최대로 갖는 브이 실 형상을 설계하였다. 또한, 실린더의 스트로크에 따른 구동시뮬레이션을 수행하였고, 최대 출력 상태에서의 붐 호이스팅 실런더의 구조 안전성을 검증하였다.

Keywords

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