A Study on the Load Capacity Characteristics of the Externally Pressurized Air Lubricated Journal Bearings

외압을 받는 공기윤활 저어널 베어링의 부하특성에 관한 연구

An investigation is carried out for the load capacity characteristics of the externally pressurized air lubricated journal bearings both theoretically and experimentally. Theoretical analysis is made using the incremental method and the finite element method, and the discharge coefficient is considered. The experiments are performed for five bearings which are produced according to the rows of supply holes and the presence of poket or step. The results are compared with the numerical results. The present numerical results are in better agreement with the available experimental results than any other earlier numerical results for the bearings having one row and two rows of supply holes with pocket. The present numerical and experimental results show that the bearing with step has larger load capacity than that without step and that the load capacity increases as the clearance ratio increases.

본 연구에서는 외압을 받는 공기윤활 저어널 베어링의 정적인 경우에 대해 증분법과 유한요소법을 적용하고 유량계수는 실험을 근거로 하여 포켓에서 베어링 내부로 유입될 때의 유압손실을 고려한 Pink와 Stout의 값을 이용하였다.