空压机冷却水道仿真分析及改进设计

Simulation Analysis and Improved Design of Cooling Water Channel for Air Compressor

为解决空压机缸盖及缸体顶面温度过热问题,基于流固耦合传热理论,建立了内部流场数值计算模型。仿真结果表明:空压机冷却水道设计不合理,缸体处冷却液流量较少,未得到充分换热,导致缸体顶面及缸盖底面温度较高。通过改进冷却水道结构,提高缸体顶面处冷却液流量,缸体顶面处温度由383.3 K降低至374.1 K;缸盖处温度由379.4 K降低至373.9 K,解决了空压机整体过热的问题.

In order to solve the overheating of air compressor, a numerical model to compute airflow field and temperature field is set up according to the theory of fluid-solid coupled heat transfer. The numerical simulation results show that the cooling water channel design of the original compressor is unreasonable, and less flow of coolant at the cylinder block which affects the cooling performance of cylinder. By changing the structure of the cooling water channel and increasing the flow of cooling water at cylinder block,the temperature of cylinder block is decreased from 383.3K to 374.1K. The temperature of cylinder cover is decreased from 379.4 K to 373.9K. Thus, the overheating of air compressor is solved.