Abstract:

As the shale shaker whose locus of every point of the shale shaker s frame is a circle is steadily working, there is the only instantaneous centreline of velocity on the vibrating shaft, and its position is fixed. The instantaneous centreine of velocity is situated between the centerline of vibrating shaft and the centroid of the eccentric pieces, and its distance to the centreline of the vibrating shaft is equal to the amplitude of the shale shaker. Provided the geometric centre of the rubber belt pully is mounted on the instantaneous centreline of velocity，the rubber belt pully only rotate around the fixed axis，and doesn’t vibrate with the shale shaker frame.

Key words: Shale shaker, Instantaneous center, Principle