汽油机涡轮增压器轴承体回热试验研究

摘要

In order to grasp the temperature distribution of turbocharger bearing an d oil sealing ring after the emergency stop in the rated condition for gasoline engine ,the heat soak-back testing for a gasoline engine turbocharger bearing housing was car-ried out by using the self-made copper constantan thermocouple .The experimental results show that the temperatures of turbo-charger bearing and oil sealing ring increase to some extent by the heat backflow .The thermal siphon effect produced by opti-mizing the layout of bearing cooling system can decrease the peak temperature of heat soak-back .%为掌握汽油机增压器轴承与密封环在发动机标定工况下紧急停车后的温度分布情况，采用自制的铜-康铜热电偶，对某型号汽油机增压器轴承体进行了回热试验研究。试验研究结果表明，某型号汽油机增压器轴承与密封环受热倒流现象的影响，温度有一定程度的上升，通过优化增压器轴承体冷却水系统布置方式，利用“热虹吸”可有效降低轴承体峰值回热温度。