武汉科技大学学报(自然科学版)
武漢科技大學學報(自然科學版)
무한과기대학학보(자연과학판)
JOURNAL OF WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY(NATURAL SCIENCE EDITION)
2014年
4期
289-292
,共4页
杨金堂%张珂%全芳成%许海
楊金堂%張珂%全芳成%許海
양금당%장가%전방성%허해
减速机齿轮%有限元分析%齿根弯曲应力%疲劳裂纹%过载断裂
減速機齒輪%有限元分析%齒根彎麯應力%疲勞裂紋%過載斷裂
감속궤치륜%유한원분석%치근만곡응력%피로렬문%과재단렬
reducer gear%finite element analysis%tooth root bending stress%fatigue crack%overload fracture
采用有限元法研究齿轮轮齿在受到不同载荷的情况下,其齿根弯曲应力和应变的变化情况。结果表明,在静载荷的作用下,齿轮齿根处的最大弯曲应力和最大应变都在许可的范围之内;而当齿轮受到冲击,在动载荷作用下,齿根处的应力大于齿轮材料的屈服极限。结合对断齿形貌的分析,可推断出轮齿的断裂是在出现疲劳裂纹后受冲击载荷作用而产生的过载断裂。
採用有限元法研究齒輪輪齒在受到不同載荷的情況下,其齒根彎麯應力和應變的變化情況。結果錶明,在靜載荷的作用下,齒輪齒根處的最大彎麯應力和最大應變都在許可的範圍之內;而噹齒輪受到遲擊,在動載荷作用下,齒根處的應力大于齒輪材料的屈服極限。結閤對斷齒形貌的分析,可推斷齣輪齒的斷裂是在齣現疲勞裂紋後受遲擊載荷作用而產生的過載斷裂。
채용유한원법연구치륜륜치재수도불동재하적정황하,기치근만곡응력화응변적변화정황。결과표명,재정재하적작용하,치륜치근처적최대만곡응력화최대응변도재허가적범위지내;이당치륜수도충격,재동재하작용하,치근처적응력대우치륜재료적굴복겁한。결합대단치형모적분석,가추단출륜치적단렬시재출현피로렬문후수충격재하작용이산생적과재단렬。
T his paper studies the change in bending stress and strain on the tooth root of the reducer gear under different loads with the finite element method .The analysis shows that the maximum ben-ding stress and the maximum strain on the tooth root are within the permitted range under the static load .But w hen the gear is affected by the dynamic load ,the bending stress on the tooth root is grea-ter than the elastic limit of the gear material .Aided by the analysis of the shape of the broken gear tooth ,it infers that the gear tooth fracture is caused by the overload under the dynamic load after hav-ing fatigue cracks .