偏置式钻井往复泵泵阀工作特性的计算机分析

Computer Analysis of the Operating Characteristics of Valves on a Drilling Pump With Offset Crankshaft

建立了偏置式钻井往复泵泵阀的运动微分方程式,得出了阀的运动规律的数值解,给出了偏置式往复泵泵阀无冲击工作的CYC条件。分析指出:合理设置偏距能够改善阀的工作性能,设计中应采用正转上偏置的曲柄滑块机构,且偏置率应小于连杆比。

The author establishes the differential equation of Valve motion on a drilling pump with offset crankshaft, works out the numerical solution of the motion pattern of the valves and presents the CYC conditions for non-impact valve operation on such a pump. The author points out that the valve performance can be improved by offsetting the crosshead upward with a offset rate smaller than the r-to-L_c ratio.