【作者】 任彬；

【导师】 韩国有；

【作者基本信息】 大庆石油学院 ， 化工过程机械， 2007， 硕士

【摘要】 螺杆泵以其运动部件少、排量均匀、适应性强等特点在油田得到广泛的应用。双头单螺杆泵与单头单螺杆泵相比具有排量大、效率高、能耗低、转子受力状况好等优点,在国际上得到逐步的推广。国内由于对双头单螺杆泵的理论和试验研究较少,目前各油田多数采用单头单螺杆泵。因此,对双头单螺杆泵进行深入的理论研究具有十分重要的现实意义。其中,合理地选择构成螺杆—衬套的型线是一个尚待深入研究的重要课题。本文主要针对双头单螺杆泵的线型进行深入的理论研究,即在双头单螺杆泵的转子和定子是刚性接触,它们的配合间隙(或过盈)刚好为零的假设前提下,不考虑油田现场的实际影响因素,对转子和定子的线型进行研究。根据多线式单螺杆钻具的设计理论,分析了共轭曲面构成的三个基本要求和端面齿形的两种类型。并对单螺杆泵端面型线进行详细的分析比较后,最终提出采用短幅内摆线的等距曲线作为定子原始齿形曲线,其共轭曲线作为转子齿形曲线的双头单螺杆泵的设计方法。利用Pro/E软件对这种新型的双头单螺杆泵的定子线型进行优选。确定变幅因数k=0.5的短幅内摆线为定子骨线,利用外滚法得出转子骨线,建立定子、转子骨线的方程。进而建立起转子、定子线型方程、等距曲面方程,并利用F曲线接触图证明该定子骨线和转子骨线满足理论密封性和连续下移条件。利用数学方法对双头单螺杆泵的线型进行优化。以追求过流面积最大,偏心距最小为优化目标,再结合螺杆泵的实际工况,建立线型优化的数学模型。利用复合型法,并结合转子和定子间的最大滑动速度的参量,优化出使双头单螺杆泵达到最佳工作特性的变幅因数k的值为0.5,以及相应的结构参数。在Visual C++语言的MFC框架内,调用OpenGL绘图命令建立双头单螺杆泵的参数化实体模型,将上述线型优化过程编译成双头单螺杆泵线型优化软件。对双头单螺杆泵的行星运动进行仿真分析,并且实时显示转子在定子内作行星运动的运动过程及运动状态。使抽象的数学方程形象、直观地表达出来,具有较强的空间感和实体感。这种可视化的参数化实体模型与优化设计软件结合,便于设计和修改。更多还原

【Abstract】 There are few single helix single screw pump with its movement part, displacement is even the characteristic of having a good adaptability etc. get more and more extensive application in the oil field. Compared with single helix single screw pump, double helix single screw pump has displacement great with high efficiency, such advantages as it is good that energy consumption is low, the rotor receives the strength state, but because domestic less to the theory of double helix single screw pump and experimental study, most of every domestic oil field adopt single helix single screw pump at present So, carrying on the deep theoretical research to spiral shell’s pole pump of one pair of heads form has very important realistic meanings. Among them , choosing to form single screw pole - the type of the bush rationally , the line is an important subject waited to further investigate.In this paper, the double helix single screw pump is taken as the research object. The conjugate tooth profiles of the rotor and stator is studied, on the condition that the stator comes into rigid contact with the rotor, and neglecting the influencing factors that when the oil recovery system working.According to the theory of multiple threaded single screw pump, we analyzed three basic requisitions of the conjugate tooth profiles and two styles tooth shape of end face. After detailed analyzing on the tooth shape of end face, the curtate hypocycloid is chosen to be the original flank profile of stator, and the conjugate tooth profiles of it to be flank profile of the rotor.On the basis of the optimization of profile using Pro/E software determinate that a curtate hypocycloid with k=0.5 is used on stator. Then profile equation of stator and rotor, isometric surface equation are derived, and dynamics analysis is done. Utilize F curve to exposed to pursuing to prove this stator of bone threads and rotor bone line are met the theory sealing and shifts down the condition in succession .Taking aid at the maximal area of wetted cross-section and minimal eccentric distance, combined with practical operating condition, optimized mathematical model of flank profile is built. Using the complex method with the maximal sliding velocity between rotor and stator, k at the optimal operational characteristics and structural parameters of the double helix single screw pump are attained.In the MFC frame of Visual C++ language, OpenGL plot command is transferred to built parameterized model of the double helix single screw pump. According to the model, weave optimum software and simulate the epicyclic motion of double helix single screw pump. In allusion to rotor’s motion, joggling curve between rotor and stator is received. The process and estate of rotor’s motion in the stator is real-time displayed. Then nonobjective Math equations are not only expressed visually and intuitionisticly but also have strong space and entity sensation. The visual parameterized model combined with optimum software is easy to design and amend.更多还原