摘要
为了有效解决螺杆泵井出现的烧泵问题,延长其检泵周期,提高经济效益,基于汽车滑移理论,建立转子生热率及非稳态温度场模型,并根据控制容积热平衡法进行求解.根据热力学第一定律,建立泵内流体增压升温模型,通过迭代计算确定螺杆泵定子截面最高温度沿轴向分布、泵内流体温度分布规律,研究了不同排出口压力、生产气油比下的温度分布规律.结果表明:由于定、转子之间的配合关系以及相对运动关系,转子截面温度场分为高温区和低温区,其轴向存在一条明显的螺旋状破坏带;定子截面最高温度沿轴向分布和泵内流体温度分布受泵内压力分布支配分为2个阶段,并随排出口压力增大向吸入口偏移;生产气油比的增大减弱了定子内壁面与泵内流体之间的对流传热,改变了泵内流体的物性参数,从而使得定子截面最高温度和泵内流体温度升高,并且其对温度场的影响主要作用在泵排出端.
In order to solve the pump-burning problem of screw pump wells, extend pump inspection cycle, and improve economic benefits, based on auto-mobile sliding theory, heat generation rate model and unsteady temperature field model of rotor were established and solved with volume-control heat ba- lance method. Pressurized heating up model was built according to the first law of thermodynamics. Stator temperature distribution in axial direction and fluid temperature distribution were determined through iterative calculation, and the distribution laws under different outlet pressure and production gas oil ratio were analyzed. The results show that because of interference fit and relative motion be- tween stator and rotor, the rotor＇s section temperature field is divided into high temperature zone and low temperature zone; an obvious spiral damage belt along axial direction has been found; the stator＇s highest section temperature distributes in axial direction and internal fluid temperature distribution, dominated by inner pressure distribution, are divided into two stages and shift towards suction as the outlet pressure increases. The increase of production gas oil ratio weakens convective heat transfer be- tween stator＇s inwall and internal fluid, changes its physical property parameters, which accordingly causes the elevation of stator temperature and fluid temperature. Its effect on temperature field change is mainly on pump outlet.
出处
《排灌机械工程学报》
EI
北大核心
2013年第2期113-117,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家科技重大专项课题(2011ZX05011-003)
关键词
螺杆泵
温度场
定子
转子
检泵周期
screw pumps
temperature fields
stators
rotors
pump inspection cycle
