热应力产生的根源及针对发动机受热件的解决方法

Main Causes of Thermal Stress and Solving Methods for Heated Components of Engines

热应力产生的根源在于“热胀冷缩受到约束” ,降低温度幅值和解除或减弱热变形约束是减小热应力的两个最基本的方法。作者重点对解除热变形约束减小热应力的各种常用措施进行了分析、探讨 ,并针对解决 4 10

The Thermal stress is often occurred under the condition of being heated or cooled if a matter deformation, whether expansion or constriction is not free. There are the most two applied ways to reduce the level of the thermal stress, minimize the amplitude of temperature and release or weaken the restriction of heat distortion. In this paper a variety of measures to solving the thermal stress problem is analyzed, The cooling problems of head cylinder and the thermal load problems for the 4102QBZ engine are studied in detail.