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对ЧН26/26柴油机活塞头的两种设计方案进行了实验研究。实验的任务包括:查明头部的机械应力状态;评价活塞冷却所采用办法的效果;确定P_6=20公斤/厘米~2时活塞头的温度场;测定P_6=20公斤/厘米~2时活塞头的顶部、筋部及元筒部的热应力。为了研究工作燃气对活塞传热的条件,在顶部受热面安装了热电偶1。图1全面地绘出了燃气对活塞头部不同区段受热面的热交换强度的特性。当依据热流量q的瞬时值来确定燃气对壁面的瞬时区
Experimental study on two design schemes of ЧН26 / 26 diesel piston head was carried out. The tasks of the experiment included: identifying the mechanical stress state of the head; evaluating the effectiveness of the method used to cool the piston; determining the temperature field of the piston head at P6 = 20 kg / cm2; determining the piston at P6 = 20 kg / cm2 The top of the head, tendons and cell tube thermal stress. In order to study the conditions under which the working gas transfers heat to the piston, a thermocouple 1 is mounted on the top heated surface. Figure 1 provides a comprehensive picture of the characteristics of the heat transfer strength of the gas to the heating surfaces in different sections of the piston head. When the instantaneous value of the heat flux q to determine the instantaneous area of the wall gas