Small impeller mounted on the shaft, the existence of its Sandy Bay Beat radial; pump body Sandy Bay Beat radial hole there. Rotating impeller week, will go to a certain point of view, the local emergence of Sandy Bay's largest radial clearance or minimum clearance space.
Rotational deformation of the shaft will produce maximum deflection.
Beat this radial superposition with the maximum deflection, the Sandy Bay will be the radial clearance b partial dynamic bmax maximum and minimum gap clearance bmin. Similarly, Sandy Bay sealed the surface of the solid particles will be squeezed, scrape out the groove.
However, if the same material, because the gap between the Sandy Bay site will not be as balanced as a "pulse" and the solid particles "strong landing situation," so, I wear the ring is smaller than the balance disc. At this time, I wear the ring as compared with the balance disc, not the principal contradiction.
However, It should be noted that the cancellation of a balanced set of multi-class pump, the Sandy Bay will increase the wear and tear for the principal contradiction, to be taken seriously.