【摘要】 对不同出口角的离心油泵叶轮直径进行了切割,当输送清水时,对离心油泵性能的变化情况和切割定律的影响进行了实验研究。结果表明,随着叶轮直径的减小,最优工况点向着流量减小的方向移动;泵在第一次切割后,即叶轮直径为205mm时,最优工况点的效率有所上升,出口角越大效率上升的幅度越大。关死工况下,扬程切割指数和轴功率切割指数分别近似等于常数。最优工况下,流量、扬程、轴功率和效率切割指数与现有理论值不同。更多还原

【Abstract】 The variation of centrifugal oil pump performance and the influence on the law of accounting fori mpellert rimmed arei nvestigatede xperimentallya ftert hei mpellersw ith differento utleta ngleo fb ladea re cut while handling water. The results show that the flow rates at best efficiency points reduce as the impellers are trimmed, the maximum efficiency of pump raises while the impeller diameter firstly trimmed to 205mm, and the larger the outlet angle of blade is, the greater the increase in the efficiency gets. The exponents of head ands haft-powera rrivea tt hec onstantsr espectivelya t shut-off points.T hee xponentso ff lowr ate,h ead, shaft- power ande fficiencyd iffer fromt hec urrent theoretical values atb este fficiencyp oints.更多还原