Directing against some troubles occurred frequently during practical operation process of YT62 hydraulic couplings

such as too high temperature of thrust bearing on the side of imppeler

burnout of thrust pads on the side of impeller and on the side of turbine

as well as rupture of impeller blades etc.

cause analysis and discussion have been carried out

and disposal methods and improvement measures being put forward

including modification of positioning disc for thrust pads on impeller side of the coupling

enlargement of oil passage grooves on centre-dividing surface of radial thrust bearing shoe on the side of impeller

cutring-off a part of equal size as that on the ruptured blade from blade almost 180° symmetrically located to ruptured blade of impeller

and the rotor being re-installed after dynamic balancing etc..After implementation

results of practical operation show that the safety and reliability of equipment have been greatly enhanced

having good performance in operation.