摘要
应用流体动力学和结构力学对螺杆泵系统进行了三维数值模拟,分析液压对螺杆泵特性的影响,提出一种新的解释螺杆泵漏失和磨损的力学机理。建立液腔的计算流体动力学分析模型,有限体积法计算得到螺杆泵液腔压力分布,进一步计算得到液压对转子的作用力和力矩。建立螺杆泵系统定转子过盈接触的有限元法计算模型,分析液压作用在转子上的力和力矩对定转子之间相互作用的影响,以及定子的受力和变形情况。结果表明:液压作用在转子上的力是螺杆泵系统漏失的主要原因,液压作用在转子上的力矩是螺杆泵两端磨损严重的主要原因。
Three dimensional numerical simulations are conducted to study the fluid dynamics and structural mechanics of the progressive cavity pump （PCP）. The influences of lifted-fluid pressure are analyzed, and a new mechanism for the slippage and abrasion of PCP is presented. The computational fluid dynamics model of the connected cavity is constructed, and the finite volume method is employed to compute the pressure distribution in the cavity. The pressure on the rotor is further obtained. A three-dimensional finite element model is also constructed to simulate the contact and interaction between the stator and rotor, with the forces and torques acting on the rotor by cavity pressure. The stress and strain states of the stator are investigated. The results indicate that the force on the rotor is the main cause of slippage, while the torque on the rotor is the main cause of abrasion at the top and bottom of the stator.
出处
《工程力学》
EI
CSCD
北大核心
2010年第4期179-184,共6页
Engineering Mechanics
关键词
螺杆泵
计算流体动力学
有限元法
漏失
磨损
progressive cavity pump
computational fluid dynamics
finite element method
slippage
abrasion
