齿轮传动微点蚀与热胶合竞争性失效机制研究

基于工程应用中微点蚀与热胶合随机发生现象，阐述了两种失效模式的损伤机理，分析了两者发生模式转变的关联规律，并提出了大扭矩宽速域传动齿轮微点蚀与热胶合竞争性失效机制的理念；在润滑油膜厚度和瞬时啮合温度计算方法的基础之上，建立了两者强度校核的统一评价准则，并基于试验测试，验证了本文中所采用技术原理的合理性与正确性，最终确定了18CrNiMo7-6与普通矿物油组合的抗微点蚀与抗胶合承载能力关联校核方法；同时，结合计算分析与试验测试，给出了热胶合发生的极限啮合温度，并通过油膜厚度和表面粗糙度的比较，推荐了微点蚀设计合理的最小安全系数. 基于本文所得结论，希望能为高功率密度、宽旋转速域齿轮传动的设计提供一种分析方法.

Based on the randomly occurring phenomena of micro-pitting and thermal scuffing in engineering applications, this paper elaborates on the damage mechanisms of these two failure modes, analyzes the correlation law governing the transition between their occurrence modes, and proposes the concept of competitive failure mechanism for micro-pitting and thermal scuffing of high-torque wide-speed-range transmission gears. On the basis of the calculation methods for lubricant film thickness and instantaneous meshing temperature, this paper establishes a unified evaluation criterion for the strength verification of both failure modes. Through experimental tests, it verifies the rationality and correctness of the technical principles adopted in this study, and finally determines the correlated load-bearing capacity verification method against micro-pitting and scuffing for the combination of 18CrNiMo7-6 and conventional mineral oil. Meanwhile, combining computational analysis and experimental tests, this paper provides the limiting meshing temperature for the occurrence of thermal scuffing, and recommends a reasonable minimum safety factor for micro-pitting design through comparisons of lubricant film thickness and surface roughness. Based on the conclusions drawn in this paper, it is expected to provide an analytical method for the design of high power density, wide rotational speed range gear transmissions.

搜集汇总

背景与挑战

背景概述

该数据集研究了齿轮传动中微点蚀与热胶合的竞争性失效机制，提出了两种失效模式的损伤机理和关联规律，并建立了统一的强度校核评价准则。研究还通过试验测试验证了技术原理的合理性，为高功率密度、宽旋转速域齿轮传动的设计提供了分析方法。