摘   要

机油冷却器是发动机必不可少的配套装置，但是它在生产制造中必须进行密封性试验。本文设计了一台气密性能自动测试台，用来测试机油冷却器的一种——YZ90机油冷却器的气密性能。本测试台参考了原来人工操作时的某些方面，它主要包括两个部分：一、机械系统部分；二、电气控制系统部分。第一部分主要包括整体方案的确定，以及各零部件的选取和设计。第二部分主要包括气压控制基本回路、控制原理、元气件选择和电气控制基本回路、电气控制原理、元气件选择及整个回路控制过程。对整体而言，用电气控制电路来控制气压传动系统，再由气压传动系统驱动整个机械部分运动，进行YZ90机油冷却器的气密性能测试。
关键词：机油冷却器，气密性，自动测试台，电气控制。

Abstract

The aim of devising this organization is to make the text more easily and alleviate the workers’ labority. In order to obtain this goal, we use module to devise this equipment, we devise machine, electricity gas combination control respectively. The mechanical parts include the decision of the whole and selecting the every part. The precision of seal is important to this auto-test equipment，we considered some aspects of the workers’ operation. We adopt gas motor to provide pressure gas, inspect of the Electric motor, we adopt bearing to unload pressure. We also consider seal. The driving of the equipment is gas pressure system and the gas pressure system is controlled by electricity system. The way of device considers machine, electricity, gas sufficient and come to the goal successful.
 
Keywords: oil cooling , air seal performance，auto-test equipment ,  electricity gas control.