1. Pump series is odd, the head of the double suction impeller, the other level of symmetry.
2. The balance hole method of unilateral intake pump, balance hole is arranged in the impeller after wheel, impeller entrance pressure water through a gap to end leakage to the impeller disk back to the water, the impeller on both sides of the differential pressure is reduced, thereby reducing the axial thrust.
3.The symmetrical water pump impeller inlet direction for symmetric form, namely single stage centrifugal pump with double inlet, multistage centrifugal pump adopts symmetrical inlet, the impeller axial thrust on both sides of the offset each other.
4. Balance disc for multistage centrifugal pump can be in the last stage impeller of the rear end of the pump shaft is provided with a balance disc, water chamber and the pump inlet is communicated with the balance after, and in front of the pressure balance disc for the last stage impeller outlet pressure, so the balance disc produced a pump axial thrust the opposite direction of the thrust, to balance the axial thrust.
5. Set the thrust bearing to balance the thrust of the above measures.
