Abstract

High-speed rolling element bearings for aircraft engines are custom-made components and operate under high temperature conditions owing to the elevated rotational speeds and loads. Therefore, assessing the various heat generation sources and mechanisms is worth investigating to accurately quantify the overall power loss within the bearing. In this context, a numerical parametric study was performed to determine and locate various power losses inside an aero-engine cylindrical roller bearing. Then, a thermal network model based on Ohm’s law was developed to estimate the operating temperatures of the bearing elements. A series of experiments was carried out on a high-speed rolling element bearing test rig to validate the numerical predictions, such as bearing component temperatures and overall power loss at specific operating conditions. The numerical predictions based on a hybrid approach showed good agreement with the experimental data.

摘要

用于飞机发动机的高速滚动轴承是定制部件，由于转速和负载升高，在高温条件下运行。因此，评估各种发热源和机制是值得研究的，以准确量化轴承内的整体功率损耗。在此背景下，进行了数值参数研究以确定和定位航空发动机圆柱滚子轴承内的各种功率损失。然后，开发了基于欧姆定律的热网络模型来估计轴承元件的工作温度。在高速滚动轴承试验台上进行了一系列实验，以验证数值预测，例如轴承部件温度和特定工作条件下的总功率损耗。