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단일 모드를 갖는 동력분기식 무단변속기의 실용성에 관한 연구
성상훈,박노길,이형우,Seong, Sang-Hoon,Park, No-Gill,Lee, Hyoung-Woo 한국마린엔지니어링학회 2007 한국마린엔지니어링학회지 Vol.31 No.1
As a method to improve the poor torque capacity on the continuously variable transmission(CVT), power splitted devices(PSD) reducing the power entering into the transmission has been considered. But this kind of PSD requires for the variator to be a large coverage of the speed ratio (CSR) Since the CSRs of the well-known push belt or the toroidal ones are not enough large, the power splitted CVTs (PSCVTs) using them should be made with multiple modes. inevitably adding the do9 clutches and the associated accessories. In this paper a PSCVT with single mode is conceptually designed A new continuously variable unit (CVU) consisting of the paired inner and outer spherical rotors is used. The CVU has large CSR and excellent compactness. As a PSD. a variable bridge (VB) using the Planetary gear units (PGUs) is considered because it has an upper bound on the power ratio. An optimal design to minimize the effective efficiency of the PSCVT is carried out. Through the performance analysis on the designed model, good expectation on the practicability in the heavy vehicle system is shown.
김정수(Jung-Su Kimg),박노길(No-Gill Park),한기봉(Ki-Bong Han),이형우(Hyoung-Woo Lee) 한국해양공학회 2014 韓國海洋工學會誌 Vol.28 No.4
In this study, a gearbox and blade were modeled in the MASTA program, and the housing and carrier components were modeled using a finite element method. Using substructure synthesis, all the components were combined and used to establish a vibration model of a 2.5-MW wind turbine gearbox. In addition, the safety displacement factor was evaluated using an AGMA data sheet about bearing’s outer race for the input shaft and output shaft. As a result, the bearing’s outer race for the input shaft, and the radial and axial responses were satisfied by the 1<SUP>st</SUP> and 2<SUP>nd</SUP> planetary gears and the 3<SUP>nd</SUP> helical gear transmission error(TE), respectively. However, theoutput shaft support bearing’s outer race responses were not satisfied with the radial response by the 2<SUP>nd</SUP> TE and axial response by the 3<SUP>rd</SUP> TE. To reduce the vibration, tooth modification was needed. After profile tooth modification, at the outer race of the output shaft support bearing, the radial response was reduced by approximately 20μm, and the axial response was reduced by approximately 6μm.