简述了容克式空气预热器产生漏风的机理及解决径向密封的两种方法,并着重介绍了国内常用的几种漏风控制系统的特点、工作原理、传感器材料的选择和针对跟踪系统而设置的几种保护装置。 关键词:漏风;扇形板自动跟踪系统;传感器 Abstract: The mechanism and two methods solving radial seal for air leakage in Ljungstrom air heater are described. The features, principal, selection of sensor material and some protection device for several kinds of air leakage control systems used in China are introduced in detail. Key words: air leakage; automatic following system for sectors; sensor