Calculation on the optimum radius of the balancing disc for multistage pump;

In operation of 6×14 CSB-4 type turbine-driven feed-water pumps,troubles such as wornout between movable and sta- tionary parts (including bracket bearing),wornout of balancing disc,burnout of thrust bearing,leakage of mechanical seal,etc.

And a new type of balancing disk with the structure design on the principle of fluid dynamic wedge was developed.

Due to the balancer's sealing failure of the high-pressure boiler' s water-feeding pump which be fur- nished balancing plate and caused the facility shutting-down to repair time after time,the author rebuilt the balancer's sealing mode based on theoretical calculation and acquired success.

The abrasion state of LP drainage pump s balancing plate are expounded, and analysis in theory under the equipment status, so as to get theoretical causes of abrasion.

Theoretical analysis of fluid flow within gaps in three-gap balance disc of multi-stage-section pump;

A dynamic wedge balance disc for multistage centrifugal pumps;

Structural optimization design of balance disc in multistage pump for better sensitivity;