摘要
Abstract
Hoisting reducer is the key component of crane hoisting mechanism,and its reliability is related to the overall use safety of shipbuilding gantry crane.In this paper,based on the review and analysis of the disassembly and inspection status of the gearbox of 800 t gantry crane delivered by a company in 2008,the input shaft of the gearbox with brake is repaired and improved through stress and vibration analysis.Considering that the snap spring groove for bearing positioning with brake gearbox input shaft will have high stress concentration when it is suddenly braked unexpectedly,the optimal design improvement proposal was adopted,the snap spring groove was removed,and the self-aligning bearing was changed into a tapered bearing and then repositioned,thus reducing the peak stress and the risk of shaft breakage when the input shaft was braked.Discussion on how to improve the dynamic balance of transmission gear shaft,reduce the vibration intensity and the damage risk of gearbox(and hoisting mechanism parts)was carried out.The above measures can not only meet the requirements of overclocking and efficient operation,but also ensure the intrinsic safety of the hoisting mechanism of gantry crane.The successful implementation of this proposal has certain guiding value for the maintenance and selection of reducer of hoisting mechanism of shipbuilding gantry crane.关键词
造船龙门起重机/起升减速器/带制动减速器输入轴/非零速急刹/允许扭转应力Key words
shipbuilding gantry crane/hoisting gearbox/input shaft with brake gearbox/non-zero speed quick brake/allowable torsional stress分类
机械制造
