Highlights:(1) it is of even vibration, reliable operation, long life. (2) its vibration force can be adjusted. The flow quantify can be changed and controlled any time. (3) motor is the excitation source, with low noise, low power consumption, and good adjusting capability. (4) the structure is simple, it performances reliable, and it is light, small, and easy for adjustment and installation. It can avoid powder and dust when using the sealed body.