摘要
为平衡离心泵叶轮的轴向力,进行了减小叶轮后盖板直径的轴向力试验研究.在假设叶轮周围液体具有不同的液体圆周角速度的基础上,推导出减小叶轮后盖板直径的叶轮轴向力计算公式.通过三组不同后盖板直径的叶轮轴向力计算值与实测值的对比,确定了叶轮周围各处液体圆周角速度的修正值分别为a=0.65,b=0.95,c=0.45,即当叶轮以角速度ω旋转时,叶片外径斜面处的液体圆周角速度为0.65ω,在切除叶轮后盖板的区域内,液体圆周角速度为0.95ω,在叶轮盖板外侧的液体圆周角速度为0.45ω.并验证了推导的叶轮轴向力计算公式基本正确,从而为采用减小叶轮后盖板直径以平衡叶轮轴向力的方法提供了理论依据和实用的计算公式.
In order to balance the axial thrust of centrifugal pumps, the experiment for the axial thrust of shortened impeller back shroud was done. By assuming different angular velocity for the liquid around impeller, the formula for calculating the axial thrust of shortened impeller back shroud was deduced. By contrasting the calculated values of three different back shroud diameters with measured ones, the revised values of a = 0.65, b = 0.95 and c = 0.45 of angular velocities liquid around impeller were confirmed. The angular velocities for liquid in the blade bevel, in the excided back shroud and in the outside impeller shroud were 0. 6509, 0. 9509 and 0. 4509 respectively,where to was the impeller angular velocity. As a resuh, the derived formula provides theoretical basis for calculating the balance of axial thrust of shortened impeller back shroud.
出处
《排灌机械》
2008年第1期1-5,14,共6页
Drainage and Irrigation Machinery
基金
国家863计划项目(2006AA100211)
关键词
离心泵
轴向力
叶轮
叶轮后盖板
多级泵
平衡
centrifugal pumps
axial thrust
impeller
impeller back shroud
multistage pump
balance
作者简介
陆伟刚（1948-），男，上海人，副研究员（luweigang@ujs．edu．cn），主要从事水泵理论与技术的研究．
李启锋（1984-），男，河南周口人，硕士研究生（lqun@sina．com），主要从事水泵理论与技术的研究．
