基于CFD的三螺杆泵螺杆轴向力计算
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摘要
在SolidWorks软件中建立了三螺杆泵的流道模型,运用Fluent求解器对三螺杆泵腔室内的非定常流动进行数值模拟,得到了三螺杆泵进出口压差,螺杆与衬套间隙,对三螺杆泵螺杆轴向力的影响。计算结果表明:随着三螺杆泵进出口压差的增大,螺杆轴向力是线性增大的;随着螺杆与衬套间隙的增大,三螺杆泵的泄漏增大导致三螺杆泵螺杆轴向力减小;随着进出口压力差的不断增大,不同间隙条件下的三螺杆泵螺杆轴向力都是逐渐增大,但是不同间隙螺杆轴向力增大幅度不同,间隙越小,螺杆轴向力增大幅度越大。
The flow channel model of the three-screw pump is established by Solid Works software,fluent solver is used to simulate the unsteady flow in three-screw pump chamber. The influence of the pressure difference between the inlet and the outlet of the three-screw pump and the gap between the screw and the bushing on the axial force of the screw of the three-screw pump is analyzed. The calculation results show that with the increase of the inlet and outlet pressure difference of the three-screw pump,the axial force of the screw increase linearly. As the gap increases,the three-screw pump due to leakage caused by the screw axial force suffered is gradually reduced. With the pressure difference between inlet and outlet increases,the axial force of the screw of the three-screw pump under different clearance conditions is gradually increased,but the increase of the axial force of the different clearance screws is different. The smaller the clearance,the greater the increase in the axial force of the screw.
The flow channel model of the three-screw pump is established by Solid Works software,fluent solver is used to simulate the unsteady flow in three-screw pump chamber. The influence of the pressure difference between the inlet and the outlet of the three-screw pump and the gap between the screw and the bushing on the axial force of the screw of the three-screw pump is analyzed. The calculation results show that with the increase of the inlet and outlet pressure difference of the three-screw pump,the axial force of the screw increase linearly. As the gap increases,the three-screw pump due to leakage caused by the screw axial force suffered is gradually reduced. With the pressure difference between inlet and outlet increases,the axial force of the screw of the three-screw pump under different clearance conditions is gradually increased,but the increase of the axial force of the different clearance screws is different. The smaller the clearance,the greater the increase in the axial force of the screw.
引文
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[3]郑梅生,王兆伍,王芳,等.用矢量代数研究三螺杆泵转子齿形[J].南京林业大学学报,2008,32(4):116-120.
[4]陈金海,王丽霞,陈德伟.双螺杆泵型线的修正[J].流体机械,2006,34(6):41-43.
[5]陈金海,陈德伟.双螺杆泵型面加工、刀具设计及计算方法[J].流体机械,2002,30(6):37-39.
[6]唐倩,张元勋,高瞻.双螺杆泵流场动力特性的数值模拟[J].中国机械工程,2010,(12):1453-1457.
[7]M.van Beijnum.CFD Simulation of Multiphase Twin Screw Pump[D].Eindhoven:Eindhoven University of Technology,2007.
[8]Yan D,Kovacevic A,Tang Q,et al.Numerical Modelling of Twin-screw Pumps Based on Computational Fluid Dynamics[J].Proceedings of the Institution of Mechanical Engineers,Part C:Journal of Mechanical Engineering Science,September23,2016.
[9]李明,李明高.STAR-CCM+与流场计算[M].北京:机械工业出版社,2011.
[10]屈文涛,胥掌世,张弘,等.潜油双螺杆泵泄漏模型的理论研究[J].石油钻探技术,2007,35(6):76-78.
[11]宋超.135型螺杆泵螺杆的设计过程及力学性能研究[D].南京:南京林业大学,2005.
[12]任玉新,陈海昕.计算流体力学基础[M].北京:清华大学出版社,2006.
[13]李福天.螺杆泵[M].北京:机械工业出版社,2010.