The harmonic screw type valve is driven by the double wave harmonic screw. It can transform circle movement to line movement for the closing and opening of the valve.
谐波螺旋式阀门采用双波谐波螺旋传动，实现由圆周运动向直线运动的转化，实现阀门的启闭。
2
Once the screw turns a circle, the liquid inside the sealing chamber will be pushed forward by a pitch.
螺杆每转一周，密封腔中的液体向前推进一个螺距。
3
Axial circle flow was introduced. The isothermal flow analysis of non-Newtonian fluid in axial circle region of a non-intermeshing counter-rotating twin-screw extruder was concerned.