作　　者： ; ;

机构地区： 上海交通大学机械与动力工程学院动力机械及工程国家教育部重点实验室

出　　处： 《发电设备》 2007年第2期98-101,共4页

摘　　要： 提出了叶轮反动度的计算公式,并对多级轴流空气涡轮进行了详细地轴向力计算,给出叶轮平衡孔、末级气封直径和轴向间隙改变情况下的轴向力变化。结果显示:平衡孔、末级气封直径对平衡轴向力的影响还是明显的,而启动过程中动态和稳定运行时轴向间隙的变化对轴向力的影响较小,但对于机组安全性的影响仍不容忽视。 A formula is being proposed for calculating the reaction degree of impellers with which a detail axial thrust calculation has been made for multistage axial flow turbines, thus finding out how the axial thrust varies with the size of its balancing hole, the diameter of the last stage gland and the axial clearance. Results show that the former 2 factors have an obvious influence on the axial balancing thrust while the last one affects little during start-up, dynamic and stable operation period. However the axial clearance still plays an important role on safety operation of the unit.

关 键 词： 能源与动力工程 轴流涡轮 轴向力 反动度 轴向间隙 气封

领　　域： [动力工程及工程热物理]