四叶片差速泵的理论研究

THEORETICAL STUDY OF DIFFERENTIAL VELOCITY 4-VANE PUMP

提出了一种新型容积泵——四叶片差速泵,它主要由非圆齿轮驱动系统、泵壳及同轴安装于泵壳内的两个叶轮组成,利用不等速转动的两个叶轮叶片之间周期性张开、闭合来实现密闭容积变化进而完成排液及吸液过程,其两叶轮的张合运动分别由两对非圆齿轮驱动实现。研究了该泵的工作原理、驱动系统中非圆齿轮节曲线以及配液孔的设计方法,并提出了解决困液及叶片干涉问题的可行方案。

As a new type of positive pump, the differential velocity 4-vane pump is presented. It's mainly composed of noncircular gear driving system, hull and two coaxial impeller fixed inside the hull. It forms compartments of varying volume depending on the movement of closing and stretching between the two neibouring vane which is driven by two pairs of noncircular gears to make liquid in and out. The operation principle of this pump and the designing method of noncircular gear's pitch and delivery ports are investigated.The solution to the trapped liquid and the vane meddling is described.