流体压力损失法检测电潜泵叶轮缺陷的研究

电潜泵的主要能量损失由水力损失引起。由于铸造工艺的限制,部分铸渣常会驻留叶轮流道造成局部阻塞,使附加水力损失加大,泵效严重降低。采用流体压力损失法研究了叶轮缺陷检测的可能性,在模拟叶轮的实际工况条件下,采用空气作为流动介质,依据附面层理论分析流道阻碍物产生的局部阻力和压力损失,通过流体压力损失法检测叶轮流道结构缺陷。理论分析和实验测量结果表明,该方法快速有效,对复杂小尺寸叶轮机械水力结构的缺陷检测具有一定的启示作用。

Inspecting defects inside impeller of electric submersible pump by fluid pressure loss measurement method

The primary energy loss of an electric submersible pump(ESP) is derived from its waterpower loss caused by fluid movement,and the additional waterpower loss can badly reduce the efficiency of ESP in employment because of obstacle from the fraction of casting residua settled in the flow path of the impeller.According to the boundary layer theory,the fluid pressure loss measurement method was presented to measure the flow path defect of the impeller by analyzing the local resistance and pressure loss produced by the obstacle inside the flow path of the impeller under the condition of simulating application using air as the media.The theoretic analysis and experimental results show that this method is quick and effective in inspecting the impeller and has some revelatory action on measuring the abnormal change of waterpower construction of relative small size and complicated impeller machine.