变压吸附器相关结构设计问题探讨

DISCUSSION FOR THE DESIGN OF PRESSURE SWING ABSORBER STRUCTURES

吸附器筒体上加设垫板和保温支撑圈,会造成筒体外壁出现局部不连续结构,引起应力集中现象,严重影响吸附器的疲劳性能。基于有限元分析结果表明:在吸附器筒体上加设垫板和保温支撑圈,其疲劳寿命不到设计寿命的16.8%和3.07%,远未达到吸附器的设计要求,结构设计不合理。将直梯设计成上端固定在吸附器联合操作平台,下端固定在裙座或土建基础上;将吸附器保温支撑圈设计成披挂式结构,可完全避免结构件与吸附器筒体的焊接,防止疲劳裂纹的产生,满足有关设计要求。

The sub-plate and insulation support ring were adopted in the design of pressure swing absorber,which resulted in severe stress concentration in the local structures. And the fatigue performance became worse. Finite element analysis was used to analyze this problem. The results show that the fatigue life is less than 16. 8 and 3. 07 percentage of the design life,which is far from the design requirements of pressure swing absorber. The previous structure design is not reasonable. Then,it is redesigned that the upper part of the ladder is fixed in the operating platform,the lower part of the ladder is fixed on the skirt or foundation,and the support ring is designed into suspender structure. The new structure can avoid the weldments between the accessories and the cylinder of pressure swing absorber. It can also prevent the fatigue crack initiation and meet the design requirements of pressure swing absorber.