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| Influence of mass imbalance on radial force of single-blade impeller |
| ZHANG Hua1,2, CHEN Bin3*, WANG Yuan4, XU Yunfeng2, WANG Zhen2 |
| 1. School of Mechanical Engineering, Hefei University of Technology, Hefei, Anhui 230009, China; 2. Lanshen Group Co. Ltd., Nanjing, Jiangsu 211500, China; 3. School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu 210044, China; 4. Nanjing Hegong Intelligent Environmental Protection Research Institute Co., Ltd., Nanjing, Jiangsu 211500, China |
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Abstract To find a way to improve the radial force of single-blade centrifugal impeller, a single-blade impeller with single-end counterweight was studied. The unsteady numerical calculation was carried out on the premise of verifying the accuracy of the steady-state numerical calculation by hydraulic characteristic test. The radial force vector distribution of the single-blade impeller was obtained; and it was found that the direction of the radial force was fixed with the relative position of the blade near the design condition. Based on the vector average of radial force in the whole period, the magnitude and direction of the average radial force were obtained. By using virtual prototype simulation technology, the impeller with balanced mass and eccentric mass were obtained; the centrifugal force generated by the eccentric mass of the impeller under the action of rotation was just closed to the average hydraulic radial force and the direction was opposite. Through the unidirectional fluid-solid coupling simulation, it was found that the radial force of impeller with eccentric mass greatly decreased in the actual operation, which proved that the method of reducing and adjusting the radial force of single-blade impeller through mass eccentricity was feasible.
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Received: 15 December 2019
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