本文關(guān)鍵詞： 流體消聲器 波紋膜片 流固耦合 動力吸振 壓力脈動　出處：《長沙理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著液壓噪聲的日趨嚴重,先進液壓傳動技術(shù)的推廣與應(yīng)用大大受限。因此,研制高效抑制液壓系統(tǒng)振動的流體消聲器成了工程領(lǐng)域的緊迫任務(wù)�；诮Y(jié)構(gòu)動力吸振原理,并考慮到既有流體消聲器的缺點,本文提出了一種波紋膜片共振式流體消聲器結(jié)構(gòu)。該結(jié)構(gòu)將波紋膜片作為附加吸振子,利用波紋膜片垂直撓度高靈敏性吸收油液中的壓力脈動能,從而實現(xiàn)系統(tǒng)噪聲的有效衰減。本文主要研究內(nèi)容和成果如下:(1)通過對柱塞泵的理論輸出流量分析,系統(tǒng)壓力脈動源主要含有兩種頻率成分。介紹了結(jié)構(gòu)動力吸振原理,并提出一種波紋膜片共振式流體消聲器。該流體消聲器通過波紋膜片載流狀態(tài)下與壓力脈動源發(fā)生共振來抑制壓力脈動。(2)采用有限元法,仿真計算載流狀態(tài)下波紋膜片的振動頻率。由于流固耦合作用的存在,波紋膜片載流頻率較真空中固有頻率大大的降低。波紋膜片的載流頻率隨著半徑的增大和膜片厚度的減小而降低,隨波長的減小和波幅的增大而升高。(3)基于CFD流固耦合分析理論,利用ADINA軟件建立了波紋膜片共振式流體消聲器的有限元分析模型,并進行了流體消聲器衰減特性仿真。仿真結(jié)果表明波紋膜片共振式流體消聲器可以有效抑制系統(tǒng)壓力脈動,且在波紋膜片載流頻率附近效果最好。(4)對樣機進行實驗研究,結(jié)果表明流體消聲器性能較好,與仿真結(jié)果大致吻合。同比圓薄板式流體消聲器,波紋膜片式性能更突出。
[Abstract]:With the increasing severity of hydraulic noise, the popularization and application of advanced hydraulic transmission technology is greatly restricted. Therefore, it is an urgent task in the engineering field to develop a fluid muffler that can suppress the vibration of hydraulic system efficiently, based on the principle of structural dynamic vibration absorption. Considering the shortcomings of the existing fluid muffler, a corrugated diaphragm resonant fluid muffler structure is proposed in this paper, in which the corrugated diaphragm is used as the additional absorber. The vertical deflection of corrugated diaphragm is used to absorb the pressure pulsation energy in oil, so as to realize the effective attenuation of system noise. The main contents and results of this paper are as follows: 1) by analyzing the theoretical output flow rate of piston pump, The pressure pulsation source of the system mainly contains two kinds of frequency components. The principle of structural dynamic vibration absorption is introduced. A corrugated diaphragm resonant fluid muffler is proposed. The fluid muffler uses finite element method to suppress pressure pulsation by resonance with pressure pulsating source under the condition of corrugated diaphragm current. The vibration frequency of corrugated diaphragm is calculated by simulation under the condition of current carrying. Due to the existence of fluid-solid coupling, The current carrying frequency of corrugated diaphragm is much lower than that of the natural frequency in vacuum, and the current carrying frequency of corrugated diaphragm decreases with the increase of radius and the decrease of diaphragm thickness. Based on CFD fluid-solid coupling analysis theory, the finite element analysis model of ripple diaphragm resonant fluid muffler is established by using ADINA software. The simulation results show that the corrugated diaphragm resonant fluid muffler can effectively suppress the pressure pulsation of the system, and the experimental study on the prototype is carried out in the vicinity of the current carrying frequency of the corrugated diaphragm. The results show that the performance of the fluid muffler is better, which is consistent with the simulation results, and the corrugated diaphragm type is more prominent than the circular thin plate type of fluid muffler.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TH137;TB535.2

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本文編號：1526514