本文關(guān)鍵詞： 結(jié)構(gòu)聲輻射 齒輪泵 有限元模型 模態(tài)分析 頻域響應(yīng) 結(jié)構(gòu)優(yōu)化　出處：《合肥工業(yè)大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：在容積式液壓泵中，齒輪泵的應(yīng)用最為廣泛，具有體積小、結(jié)構(gòu)簡單等優(yōu)點，同時也存在著壓力脈動大、噪聲較大等缺點，本文將對外嚙合齒輪泵進行降噪研究。 齒輪泵的噪聲主要包括齒輪嚙合產(chǎn)生的噪聲、液體壓力脈動噪聲和外界激勵產(chǎn)生的噪聲三個部分，為控制齒輪泵的輻射噪聲，以剛度為約束條件，對齒輪泵進行結(jié)構(gòu)優(yōu)化設(shè)計。 首先，簡述齒輪泵設(shè)計時應(yīng)該注意的幾個關(guān)鍵問題和解決方法，完成齒輪泵設(shè)計，建立齒輪泵的實體模型，同時計算齒輪的嚙合力。 其次，根據(jù)有限元分析的需要，簡化模型、劃分網(wǎng)格以及選取材料參數(shù)等，建立齒輪泵的有限元模型，然后進行模態(tài)分析和齒輪泵基于模態(tài)的頻域響應(yīng)計算，得到齒輪泵的振動特性。 然后，運用直接邊界元法，預(yù)測齒輪泵的外聲場輻射噪聲，研究聲場分布云圖特性，提取特定場點處的聲壓變化曲線，確定需要降噪的頻率范圍。 最后，以剛度為約束條件，優(yōu)化齒輪泵的結(jié)構(gòu)，降低齒輪泵在特定范圍內(nèi)的輻射噪聲值，，達到降噪的目的。
[Abstract]:In the displacement hydraulic pump, gear pump is the most widely used, has the advantages of small volume, simple structure, but also has the shortcomings of large pressure pulsation, large noise and so on. In this paper, the noise reduction of external meshing gear pump is studied. The noise of gear pump includes three parts: gear meshing noise liquid pressure pulsation noise and external excitation noise. In order to control the radiated noise of gear pump stiffness is taken as the constraint condition. The structure optimization design of gear pump is carried out. Firstly, several key problems and solutions should be paid attention to in the design of gear pump, the design of gear pump is completed, the solid model of gear pump is established, and the meshing force of gear is calculated at the same time. Secondly, according to the need of finite element analysis, simplify the model, divide the mesh and select the material parameters, establish the finite element model of gear pump, and then carry out modal analysis and frequency domain response calculation of gear pump. The vibration characteristics of gear pump are obtained. Then, the direct boundary element method is used to predict the noise emitted from the external sound field of the gear pump, to study the characteristics of the distribution cloud image of the sound field, to extract the change curve of the sound pressure at a specific field point, and to determine the frequency range of the noise reduction. Finally, the structure of gear pump is optimized to reduce the radiated noise value of gear pump in a specific range, so as to reduce the noise.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH325

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