1.Construction Department of Pizhou Pumping in South-to-North Water Diversion East Route Project, Pizhou, Jiangsu 221300, China; 2.Shanghai Investigation, Design & Research Institute, Shanghai 200434, China; 3. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China
Although pumping station noise is clearly defined in Pumping Station Design Standard, in most cases the noise exceeds the standard. In South to North Water Diversion Project, long pumping time makes the issue more serious. Effective methods were discussed and adopted on the basis of noise sources analysis. Firstly, the noise occurrence principle was analyzed, and according to the noise characteristics, optimizing electromagnetic circuit, selecting superior material, improving processing standards and so on were made in the aspects of design and manufacture to reduce noise from the basic level. Secondly, considering the units′ structure and arrangement, damping insulation blankets were used on the motor and runner shells to weaken the noise spread. Finally, sound-absorbing material and building acoustic space was applied at the station. As the prevention methods used together, the motor floor noise of pumping station is less than 85 dB, which is better than the nation′s specification and good for working environment.