风扇寿命计算方法簡介2.計算方法:
(1)截尾壽命試驗法
在額定溫度和環境下,以50%油量损耗作为失效标准,用精密儀器在不同时刻2K,3K,5K,10K小时分别測試轴承含油量,并
预估油耗50%时的时间。
數據→擬合→外推
油耗公式:Y=aX + b
a=Σ(Xi-X)*(Yi-Y)/ Σ(Xi-X)2
(Y:残余油量;X:时间;a:斜率;b:初始值常數,一般100)
MTTF=t min +( t max – t min)*0.632
L10=t min + ( t max – t min)*0.1
◎ L10 Expectancy: 70,000 hours minimum@ fan rated voltage and the temperature of 40℃, According to the
equation for Weibull distribution, MTTF ≒ 7×L10 = 490,000 hours. And we rely on a zero failure test strategy
and accelerated testing technique, to determine the total test time (t) for verifying the above life estimation by the
equations,作者: 三寸 时间: 2011-5-1 09:03