Kinematical Simulation Of The Single Progressive Cavity Pump, FEM Simulation And Optimization Of Structure

The single progressive cavity pump plays an important role in the transportation of the fixing-well additive in oil field. But the leakage is serious and wear-resisting property of stator is low in practice. In order to improve mechanical property, we must research the mode of motion, the deformation of inner-contour and abrasion of stator, which has the vital practical significance.The rotor and the stator are the main working parts of the progressive cavity pump. The rotor's and the stator's surface is complex and mode of motion is particular. This paper specified the radical principle of progressive cavity pump, got the equations of stator and rotor, got the mathematical expression of sealing line and explained the formation mechanism of the seal cavity between rotor and stator. From kinematics angle,this paper studied the motion of seal cavity and the motion of rotor.According to the radical principle, this paper made the 3D model of the rotor and stator by SolidWorks, made kinematical simulation analysis of the progressive cavity pump by COSMOSMotion and got the graphs of the trace, displacement, velocity, acceleration of the point on the rotor.This paper made the static analysis of structures and contact analysis, studied the deformation of the stator, the distribution of stress and shear strain. It is supposed that the stator work under an even inner pressure, the working pressure difference and contact condition. Last, according to the analysis result, this paper improved the structure of stator, then made the finite element analysis to the improved stator. The result showed that the sealing property and wear-resisting property of improved stator are raised.