浮动花键抗磨损强度分析与试验

为了解决航空发动机附件传动系统花键连接结构在正向设计阶段分析能力薄弱、缺少基础数据支撑，以及在复杂工作 条件下齿面磨损严重等问题，开展了浮动花键磨损强度评估方法研究，提出适用于发动机附件传动系统浮动花键的齿面接触应力 计算方法。并开展了花键磨损影响因素对比试验，测量不同材料、表面粗糙度、表面处理、润滑条件、偏斜角、齿形条件下的磨损量 和齿厚变化量。结果表明：花键表面硬度是决定抗磨损能力的主要因素，硬度大抗磨损能力强；在偏斜状态下工作的花键通过齿 形修形改善接触区位置，降低接触应力，可提高抗磨损能力；润滑油润滑可以减小摩擦磨损，减少磨屑产生，是减小花键磨损的首 要措施；正确选择齿侧间隙有利于减小磨损发生。

Analysis and Test of Floating Spline Wear Resistance

In order to solve the problems of weak analyzing ability, lack of basic data support, and severe tooth surface wear under complex working conditions in the forward design phase of spline joints aeroengine accessory transmission system, the research on wear resistance evaluating method of floating spline was carried out, a tooth surface contact stress calculating method suitable for floating splines in aeroengine accessory transmission systems was proposed. Comparative tests were carried out to investigate the influencing factors of spline wear, during which measurements of the amount of wear and tooth thickness changes were conducted under the different materials, surface roughness, surface treatment, lubrication conditions, angular misalignment, and tooth profile conditions. The results show that the surface hardness is the main factor affecting wear resistance, the higher the hardness the higher the wear resistance; spline can improve contact zone position by tooth profile changes, and reduce contact stress, hence improving the wear resistance under angular misalignment; the lubrication can reduce frictional wear, decrease ablation, and is the primary measure to reduce spline wear; correct selection of backlash is beneficial for reducing wear.