Teikoku USA | Chempump
Instruction Manual G-Series
8
1.6 External Cooling Flow (Standard Plan 11-S)
Cooling for stator, rotor, and bearings, as well as bearing
lubrication, is provided by circulation of the pumped fluid. A
small flow circulates through the circulation tube, through the
rear bearing housing, across the rear journal, over and around the
rotor, across the front journal and front bearing housing, through
the eye of the impeller, and returns to the mainstream flow. See
Figure 1-1, Page 6
.
1.7 Automatic Thrust Balance
A) Single Stage Models GA, GB, GC, GVBS and GVD.
Based on hydraulic principles, G-Series automatic thrust balance is
generated by the pressure of the internally circulated pumped fluid
flowing into a balance chamber just to the rear of the impeller.
When a change in load tends to change the position of the
impeller away from the balance condition, there is an equalizing
change of hydraulic pressure in the balance chamber which
immediately returns the impeller-rotor assembly to the balanced
position. See
Figure 1-7
.
B) Single Stage Models GVE, GVHS, GG, and GVM.
Automatic thrust balance on these models operates on the
same principle as noted above except that balance chambers are
provided on the front as well as the rear of the impeller to absorb
the additional axial thrust loading of these larger models. See
Figure 1-8
.
Figure 1-8. Automatic Thrust Balance, Double Ring
Figure 1-7. Automatic Thrust Balance, Single Ring
