常规螺杆泵定子有限元分析

FEM Analysis for a General Screw Pump Stator

螺杆泵定子橡胶不仅是易损构件,而且它与转子的配合状况对螺杆泵的工作性能影响显著。目前,还没有能够直接对实际工况下的定子橡胶的变形和受力状态进行测试的有效手段,因此对螺杆泵定子进行有限元分析自然是有益的尝试。重点研究定子橡胶衬垫内轮廓线的变形规律,而应力和应变分布情况仅作为辅助性的分析;对螺杆泵工况的考虑方面,重点研究均匀内压作用的情况,再考虑工作压差以及定子与转子的装配等所引起定子橡胶的变形和受力的变化。利用有限元分析软件Abaqus,对螺杆泵定子进行研究,得出了螺杆泵定子在不同工况下的受力状态和变形规律以及定子材料参数对变形规律的影响。利用此规律可对螺杆泵进行优化设计,提高其工作效率。

The rubber in a screw pump stator is not only susceptible to damage, but also to affect a screw pump working performance by the conjugate situation between its stator and rotor. Recently, the effective method has been not found for testing the deformation and forced state of the rubber of a stator under a real working condition. The FEM analysis for a stator, however, is naturally useful. The deformation regularity of an inner contour line of the rubber was studied mainly and its stress and strain state were analyzed subordinately. For a screw pump working situation, its forced state and deformation regularity were researched firstly under an even inner pressure and secondly under a working pressure difference and under different assembles between its stator and rotor. The stress state and deformatoin regularity of a screw pump stator has been obtained by FEM analysis software (ABAQUS) under different working conditions. The regularity can be applied to optimize the design of screw pumps and improve its working efficiency.