采油螺杆泵举升压力随过盈量的变化规律研究

Lifting Pressure Varies with the Change of the over Interference Quantity in Progressive Cavity Pump

过盈量是与螺杆泵举升压力密切相关的参数。采用ANSYS12.0软件对GLB120-27型采油螺杆泵建立三维有限元模型,利用数值模拟的方法分析过盈量对举升压力的影响。取1/2个导程作为研究对象,得出在不同腔室压力下,过盈量为0.3mm时螺杆泵的临界接触压力,计算出其理论举升压力。依此方法求解出在不同过盈量下螺杆泵的举升压力,得出举升压力随过盈量的变化规律曲线和表达式,可为螺杆泵的优化设计提供理论依据。

In the consequence,improving the lifting pressure of screw pump has important practical value. Interference is closely parameter related with the screw pump lifting pressure, numerical simulation methods is used to analyze the impact which interference quantity on lifting pressure. ANSYS12.0 is used to establish 3D finite element model of GLB120-27 type of screw pump,tak- ing half of the lead as the research object,obtained the critical contact pressure under different chamber pressure while interference for 0. 3 mm,then calculate the theoretical lifting pressure. With this method used in lifting pressure under different interference,the conclusion is made for curve and expression which lifting pressure varies with the change of the over interference quanti ty,which provides theoretical basis for the optimization design of screw pumps.