Scholarlink

<p>In aero-engines excessive heat generation from rolling bearings may reduce lubricant film thickness at contact interfaces, potentially leading to premature bearing failure. To prevent bearing overheating, it is essential to apply an effective cooling method. The under-race lubrication method, which is a common approach for rolling bearings in aero-engines, has limited cooling efficiency for the outer ring. However, increasing the lubricant flow rate may lead to power losses due to lubrication resistance and raise the risk of skid damage. In this paper, a thermal network model was implemented to analyze the temperature distribution of the bearing and to evaluate an outer ring cooling method effectiveness. The implemented model was used to analyze the effect of the outer ring cooling method. Under high-speed operating conditions, the outer ring cooling method effectively reduced the temperature of the outer ring by up to 15&#xa0;°C. Therefore, the outer ring cooling method is expected to be effective for bearing thermal management and may also save energy losses by reducing under-race lubrication flow rate. The model implemented in this paper can be used to predict heat generation and temperature distribution in bearings and is anticipated to be a useful tool for evaluating the effectiveness of different bearing cooling strategies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Thermal Network Analysis of the Outer Ring Cooling Method for a High-Speed Aero-Engine Bearing

  • 期刊论文

  • 发表日期：

    2026年4月8日

查看全文
  • Hyun Min Song,
  • Seong Hyeon Kim,
  • Dong Min Kim,
  • Jisu Park,
  • Sun Je Kim

摘要

In aero-engines excessive heat generation from rolling bearings may reduce lubricant film thickness at contact interfaces, potentially leading to premature bearing failure. To prevent bearing overheating, it is essential to apply an effective cooling method. The under-race lubrication method, which is a common approach for rolling bearings in aero-engines, has limited cooling efficiency for the outer ring. However, increasing the lubricant flow rate may lead to power losses due to lubrication resistance and raise the risk of skid damage. In this paper, a thermal network model was implemented to analyze the temperature distribution of the bearing and to evaluate an outer ring cooling method effectiveness. The implemented model was used to analyze the effect of the outer ring cooling method. Under high-speed operating conditions, the outer ring cooling method effectively reduced the temperature of the outer ring by up to 15 °C. Therefore, the outer ring cooling method is expected to be effective for bearing thermal management and may also save energy losses by reducing under-race lubrication flow rate. The model implemented in this paper can be used to predict heat generation and temperature distribution in bearings and is anticipated to be a useful tool for evaluating the effectiveness of different bearing cooling strategies.