低温升功能保持架轴承流场特性分析

In order to improve the lubrication performance of bearing under high speed conditions and reduce the temperature of bearing, a functional cage with low temperature characteristic has been proposed. The established numerical calculation model of the bearing reveals the regulatory effect of the functional cage on the gas phase flow field in the bearing cavity. Based on the field synergy theory, the influence of functional cage on the temperature field and heat transfer performance of bearing under high speed conditions is explored. A comparative analysis is conducted on the oil distribution and flow characteristics of traditional and functional cage bearings at different rotational speeds. Finally, through a bearing temperature testing system, the temperature rise characteristics of traditional and functional cage bearings are compared at different speeds. The research results indicate that the functional cage regulates the gas phase flow field in the bearing cavity, increases the gas flow into the bearing cavity, and improves the heat transfer performance of the bearing cavity. Compared to traditional cage, functional cage allows more oil to flow through the bearing cavity, providing low temperature rise performance and a maximum temperature reduction of 2.2 ℃. This study provides a new idea for designing cage with the function of reducing bearing temperature rise.