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Analysis of ring deformation of hot-water pump based on thermo-solid coupling |
Cao Weidong, Wang Xiulan, Hu Qixiang |
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract The rotor parts wear were usually caused during the hot-water pump running process. In order to improve the reliability and safety of the pump, based on the software ANSYS Workbench, the TEG200-400 hot-water pump was analyzed with thermal-solid coupling at different temperatures. The ring deformations at different temperatures has been obtained, and the deformations were also analyzed with and without the cooling water chamber. The results can provide a certain basis for the choice of gap between the impeller ring and volute ring. The analysis shows that the flushing of the cooling water chamber affects the impeller ring deformation obviously, and during the running process of the high-temperature process pump, the temperature at the connection between pump cover and bracket should be decreased as much as possible to reduce the deformation of the impeller ring. The deformation of the volute ring and the impeller ring become greater as the media′s temperature increases. In order to avoid the friction between the volute ring and the impeller ring during the pump start and running process, the thermal deformation should be reasonably estimated, and the ring gap should be chosen for the design according to the temperature of the running medium, the pump structure, material cha-racteristics, et al. If the radius gap between impeller ring and volute ring is larger than 0.6 mm, the scheme is safe under the condition that media′s temperature is 250 ℃.
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Received: 17 January 2013
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