The closed cooling water pump in Ningde plant is tested

the results show that selection margin is too large

pump head is higher

and pump efficiency can’t reach the design requirements

operating conditions away from design conditions

manufacturing processes is poor and flow symmetric is difference.Some methods

such as optimizing the leaf blade of import and export

optimizing the impeller shaft type line

optimizing the overall flow of the impeller

and improving maintenance installation process

are used to eliminate the vibration of pipe and reduce the power consumption rate in order to achieve the energy saving purposes.