Research on Noise Reduction of 3.6 MW Evaporative Cooling Wind Motor Induced by Electromagnetic and Two-Phase Flow Resonance Based on Stator Optimization
| Autor: | Shoudao Huang, Jie Yang, Ziran Cheng, Lin Ruan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Stator 020209 energy Bioengineering 02 engineering and technology evaporative cooling permanent magnet semi-direct drive generators lcsh:Chemical technology 01 natural sciences 010305 fluids & plasmas law.invention lcsh:Chemistry law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Chemical Engineering (miscellaneous) lcsh:TP1-1185 wet mode analysis Process Chemistry and Technology Resonance Natural frequency Mechanics stator structure optimization Vibration lcsh:QD1-999 resonance noise reduction Two-phase flow Beam (structure) Noise (radio) Evaporative cooler |
| Zdroj: | Processes, Vol 9, Iss 669, p 669 (2021) Processes Volume 9 Issue 4 |
| ISSN: | 2227-9717 |
| Popis: | In this paper, the vibration frequency of the stator of 3.6 MW fully immersed evaporative cooling permanent magnet semi-direct drive generators (ECPMSDDGs) was analyzed based on the fluid-structure coupling theory and solved by finite element analysis (FEA) simulation. The resonance noise reduction research under the typical working condition induced by two-phase flow and electromagnetic force was studied based on the method of structural optimization. In this paper, a structural optimal design method for the stator of the 3.6 MW ECPMSDDGs was presented. First of all, the frequency and characteristics of electromagnetic force of 3.6 MW ECPMSDDGs under the rated power were analyzed. Secondly, the frequency and characteristics of two-phase flow boiling vibration were analyzed based on the bubble oscillation theory of the two-phase flow and the experiment. Thirdly, the wet modal natural frequency of the stator core cooling structure was analyzed based on the fluid-structure coupling theory and FEA. Finally, the natural wet mode vibration frequency of the stator cooling structure of the 3.6 MW ECPMSDDGs was improved based on the structure optimization. This optimization method could reduce the resonance noise of evaporative cooling motor induced by electromagnetic and two-phase flow. The optimization results showed that the natural wet mode frequency of the stator could be improved by optimizing the radial flow groove and supporting beam under the condition that the effective length of the stator core remained unchanged during the optimization. The noise simulation result showed that the resonance noise of 3.6 MW ECPMSDDGs induced by electromagnetic and two-phase flow could be reduced after the structural optimization. |
| Databáze: | OpenAIRE |
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