Fatigue Life Prediction for Throwing Impeller of an Impeller Blower

Zhai Zhiping,Li Can,Cui Hongmei,Liang Hongyu,Cheng Haiying

Table 1 Comparisons between predictinglives and rating livesof the throwing impeller(h)

P(%) 50 90 99 Conventional S-N curve (Gerber) 1.2780×107 7.1867×106 6.2593×106 Conventional S-N curve (Goodman) 7.7963×106 4.3842×106 3.8195×106 Two-parameter model (Goodman) 6.1391×106 3.4522×106 3.0068×106 Two-parameter model (Gerber) 3.2761×106 1.8679×106 1.6046×106 Rating life 3.5×106 2.0×106 1.8×106