TY - JOUR TI - Study on key technologies of energy-saving and environment-protective pumps AU - Zhang Qi-Hua AU - Xu Yan AU - Xu Yuan-Hui AU - Shi Wei-Dong AU - Lu Wei-Gang AU - Liu Wei JN - Thermal Science PY - 2013 VL - 17 IS - 5 SP - 1556 EP - 1559 PT - Article AB - To meet energy-saving and environment-protective purpose, a series of plastic pumps are developed by composite molding. There are four key techniques involved, firstly, plastic hydraulic components with light-weight; secondly, steel barrel as a pump casing and a connection component as well; thirdly, floating impeller strategy where impeller is drifting freely along shaft; and lastly, a self balancing impeller technique which can totally keep axial force balancing. The manufacturing process is energy-saving, and the components can be recycled, which have great potentials for conservation of environment.