Common Problem of Hydraulic Coupling
| Fault Performance | The Possible Reasons | Elimination Methods |
| 1.Unit Vibration | a.The installation foundation is weak. | a.Reinforcing Foundation |
| b.The shaft of the hydraulic coupling does not meet the requirements. | b.Adjust the axis according to the axis installation. | |
| c.Rotor dynamic balance does not meet the requirements. | ||
| 2.Excessive Bearing temperature | a.Oil is not clean. | a.Clean oil tank, filtering oil. |
| b.The cooler does not cool well. | b.Clean the cooler. | |
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c.Lub. oil pressure is low. | c.Improve the lub. oil |
| 3.Excessive differential pressure of lubricating oil filter | a.Filter of the strainer blocked. | a.Switch the filter and clean the filter. |
| 4.Turbine rated speed (output) is too low | a.Oil supply is insufficient. | a.Check pump and pipeline and eliminate the trouble. |
| b.Fusible metal melting of fusible metal slug. | b.Replace the fusible metal slug or recast fusible metals. | |
| 5.Thrust bearing serious abrasion | a.Lubricating oil supply is insufficient. | a.Check Lub. Oil pump and pipe and eliminate the trouble. |
| 6.Excessive oil drainage temperature | a.Control valve can’t be opened normally. | a.Check control valve to make sure it normal. |
| b.Working oil cooler is break down. | b.Check working oil cooler to make sure that temperature of inlet and outlet is normal, and to make sure the cooler is under normal operation. | |
| c.Speed-regulating oil pump operation is abnormal. | c.Check speed-regulating oil pressure of adjusting oil pump. When the pressure is too low, it is necessary to clean the oil filter or clean the oil tank, and check whether the impeller of centrifugal oil pump is damaged. | |
| 7.Low lubricating oil pressure | a.Lubricating oil system leakage. | a.Solve the leakage. |
| b.Motor pump oil supply is too large. | b.Reduce main motor or orifice size on the oil supply pipe of Feed Water Pump. | |
| c.Lubricating gear pump is damaged. | c.Repair or replace gear pump. | |
| 8.Large axial vibration | a.Thrust bearing are damaged. | a.Repair or replace bearing. |
| b.Axial force of motor or feed pump transfer to coupling. | b.Deal with problems of motor or pump. | |
| c.Increasing speed gear damaged. | c.Repair or replace gear. |
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