摘要
为了改善齿轮传动性能和可靠性,提出了直齿锥齿轮齿面抗磨设计与分析方法。该方法结合碟型刀具在摇台型机床切制直齿锥齿轮方法获得大轮齿面;通过预置传动误差及抛物线修形参数设计小轮法向Ease-off曲面,并叠加于大轮的共轭齿面表达修形齿面。结合齿面接触分析、承载接触分析、Archard磨损公式,提出考虑磨损深度影响的齿面承载接触分析数值方法,将齿面几何分析与力学分析融为一体,且充分考虑了安装误差、齿面修形和磨损的耦合性,可准确快速获得齿形重构后的齿面磨损量;以无磨损时承载传动误差幅值(ALTE)最小、齿面磨损次数最多进行修形优化设计,获得最优Ease-off曲面,并分析磨损对ALTE的影响。结果表明:相同磨损量下,随载荷的增加磨损次数逐渐减少且趋于相等;随齿形重构次数增加,主要是双齿啮合区的齿面初始间隙增加,导致承载变形增大;多载荷工况下,随磨损次数增加最小ALTE及其对应的载荷逐渐增大;共轭齿面轻度磨损后ALTE有所改善。
An approach of ease-off flank modification for straight bevel gears is proposed to improve meshing performances and reliability.By means of technology of milling straight bevel gear with plate cutters on a cradle generator,the modified pinion is represented by a sum of two vector functions determining the conjugate gear tooth,and normal ease-off deviations expressed by both predesigned transmission error function and tooth profile modification curves.Then a numerical method of loaded wear tooth contact analysis considering wear is introduced according to tooth contact analysis,loaded tooth contact analysis and Archard formula of wear,which combines tooth surface geometry analysis with mechanical analysis and fully considers the coupling of alignment error,tooth surface modification and wear.So the wear depth of tooth profile reconstituted is obtained accurately and quickly.The best ease-off modification is determined by optimizing with minimal amplitude of loaded transmission error(ALTE)and maximal wear times as the objectives,and the influences of wear on ALTE are explored.The results show that the wear times with the same depths gradually decrease and tend to equal as increasing loads.The increasing wear times lead to increasing initial contact clearances from meshing zone of two pairs,which is mainly responsible for increasing meshing deformations.Under multi-load conditions,minimum ALTE and the corresponding load increase gradually with increasing wear times;mild wear facilitates reducing ALTE for conjugate tooth.
作者
蒋进科
刘钊
刘红梅
JIANG Jinke;LIU Zhao;LIU Hongmei(School of Automotive, Chang’an University, Xi’an 710064, China;Key Laboratory of Automotive Transportation Safety Techniques of Ministry of Transport, Chang’an University, Xi’an 710064, China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2020年第6期99-106,共8页
Journal of Xi'an Jiaotong University
基金
中央高校基本科研业务费资助项目(300102228103)
陕西省自然科学研究计划资助项目(2018JM5089)。
