回转式空气预热器稳态自补偿式热端径向密封控制技术

A Non-contact Self-Compensation Radial Seal Control Technology for Hot End of Air Preheater Element

介绍回转式空气预热器漏风率的影响因素,漏风的主要控制方法,目前市场上主要的空气预热器密封型式及其结构特点,以及空气预热器稳态自补偿式密封的结构及特性以及稳态自补偿式密封与空气预热器漏风的关系,并从设计、工艺、制造及安装等方面入手,分析了稳态自补偿式密封的性能特点。着重介绍稳态自补偿式热端径向漏风控制方法的实施依据,提出一种非接触式、综合转子热态变形量的具有热态自补偿功能的密封结构型式。

The influencing factors of the air leakage rate of the rotary air preheater,the main control methods of the air leakage,the main sealing types of the air preheater in the market at present and their structural characteristics,the structure and characteristics of the non-contact self compensating seal of the air preheater,and the relationship between the non-contact self compensating seal and the air leakage of the air preheater is introduced.The performance characteristics of non-contact self compensation type are analyzed.The implementation basis of non-contact self compensation radial air leakage control method at hot end is emphatically introduced.A non-contact sealing structure with thermal self compensation function is proposed,which integrates the thermal deformation of the rotor.