万向节——齿轮机构驱动的叶片差速泵  

Study of a Differential Velocity Vane Pump Driven by Hooke′s Joints

作　　者：陈明[1] 訾进锋[1] 张勇[1] 李瑰贤[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《机械科学与技术》2006年第11期1298-1300,1379,共4页Mechanical Science and Technology for Aerospace Engineering

摘　　要：万向节机构当其输入轴与输出轴的轴交角不等于零的时候，具有把输入轴的匀速转动转换为输出轴的非匀速转动的特性。利用这一特性，把两个万向节机构和圆柱齿轮机构组合形成了叶片差速泵的驱动系统。该驱动系统使同轴安装于泵壳内的两个叶轮周期性不等速转动，从而，使两个叶轮的相邻叶片周期性张合，来实现密闭容积变化进而完成吸排液过程。万向节机构的输入轴和输出轴的夹角是影响泵性能的一个关键参数。该角越大，泵的排量也越大，但是，随着此角增大，泵的流量脉动加剧，万向节传动效率降低，使泵的工作性能下降。在实际设计中此角取35°～50°比较适宜。The Hooke＇s joints have the characteristics of transforming the uniform rotation of a driving shaft to the nonuniform rotation of a driven shaft when the crossing angle between the driving shaft and the driven shaft does not equal to zero. By using the characteristics, the combination of two Hooke＇s joints with cylindrical gear mechanisms forms the driving system of a differential velocity vane pump. The driving system makes the two coaxial impellers that were fixed inside the hull of the pump rotate with periodical but nonuniform velocity, and the neighboring vanes of the two impellers open and close periodically, which changes the volume of the compartments and makes liquid flow in and out. The crossing angle between the driving shaft and the driven shaft is a key parameter that affects the performance of the pump. The larger the angle is, the higher the pump＇s flow out. However, as the angle increases, the fluctuation of the flow is greater and the rotational efficiency of the Hooke＇s joints decreases, and the performance of the pump is poorer. In a design instance, the angle of 35° to 50° is desirable.

关 键 词：万向节 齿轮 叶片差速泵 

分 类 号：TH30[机械工程—机械制造及自动化]