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| Influence of geometrical parameters of vibration damping raft on vibration characteristics of a marine centrifugal pump |
| WANG Xinhai1, LI Yu2, LIU Houlin2*, WANG Kai2,3, WANG Shuhong4, WANG Yue4 |
| 1. Navy Military Representative Department Resident in Huludao, Hulutao, Liaoning 125004, China; 2. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 3. Institute of Fluid Engineering Equipment, Jiangsu Industrial Technology Research Institute, Zhenjiang, Jiangsu 212009, China; 4. Xi′an Aero-engine Controls Technology Co. Ltd., Aviation Industry Corporation of China, Ltd., Xi′an, Shaanxi 710077, China |
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Abstract A vertical marine centrifugal pump was selected as research object for a better understanding of influence of geometrical parameters of a vibration damping raft on performance of the pump. An approximate model of pump vibration characteristic and raft mass was established based on the Kriging model in terms of front cavity length l1, width w1, thickness t1, lateral cavity length l2, width w2, thickness t2. Twelve numerical experimental designs were generated by using the Latin Hypercube method and the vibration characteristics of two rafts respectively with the lightest mass and the minimal vibration intensity were analyzed. The results show that l1 and t2 affect the mass of raft most significantly. With the increase of l1, the mass of raft decreases first and then rises. With the increase of t2, the mass of raft increases first and then two peaks appear. t2 shows a slight effect on the vibration intensity. The vibration intensity of raft all decreases first and then increases with increa-sing l1, w1, t1, l2 and w2. The vibration attenuation with the lightest mass and the minimal vibration intensity are significantly improved, as a result, the vibration attenuation increases to 22.6 dB and 21.8 dB, respe-ctively, from 14.2 dB.
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Received: 24 December 2018
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