本文關(guān)鍵詞： 球式自動(dòng)平衡裝置 倍頻激勵(lì) 數(shù)學(xué)模型 計(jì)算機(jī)仿真 實(shí)驗(yàn)驗(yàn)證　出處：《中南大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：回轉(zhuǎn)機(jī)械是應(yīng)用很廣泛的一類機(jī)械。由于設(shè)備質(zhì)量缺陷、維護(hù)不當(dāng),會(huì)引起回轉(zhuǎn)機(jī)械的各類故障,振動(dòng)是其主要表現(xiàn)形式。振動(dòng)過(guò)大會(huì)影響旋轉(zhuǎn)機(jī)械的穩(wěn)定運(yùn)行,甚至?xí)鹪O(shè)備破壞,造成重大的經(jīng)濟(jì)損失,有時(shí)會(huì)威脅到生產(chǎn)人員的人身安全。解決這一問(wèn)題有效的辦法就是對(duì)轉(zhuǎn)子進(jìn)行高精度的平衡。以往,幾乎都是采用靜平衡的方法。但是,這種方法工作量大,效率低,技巧性強(qiáng)。為了避免上述缺點(diǎn),對(duì)于在過(guò)臨界轉(zhuǎn)速下工作的回轉(zhuǎn)機(jī)械,人們開(kāi)始采用被動(dòng)式自動(dòng)平衡裝置進(jìn)行動(dòng)平衡。球式自動(dòng)平衡裝置就是其中一種。 目前,無(wú)論是國(guó)內(nèi)還是國(guó)外,對(duì)球式自動(dòng)平衡裝置的相關(guān)研究都只考慮了滾球?qū)ζ馁|(zhì)量引起振動(dòng)的平衡作用。由偏心質(zhì)量產(chǎn)生的慣性力是基頻激勵(lì),實(shí)際上很多時(shí)候倍頻激勵(lì)也是引起機(jī)械振動(dòng)的主要原因。因此,研究球式自動(dòng)平衡裝置在倍頻激勵(lì)下的動(dòng)態(tài)特性有很重要的意義。本文針對(duì)研究球式自動(dòng)平衡裝置在倍頻激勵(lì)下的動(dòng)態(tài)特性進(jìn)行了理論、仿真和實(shí)驗(yàn)研究。 本文的主要研究?jī)?nèi)容如下： 1.分析了倍頻激勵(lì)產(chǎn)生的原因和相應(yīng)的振動(dòng)特征,并對(duì)滾球轉(zhuǎn)子進(jìn)行了動(dòng)力學(xué)分析。根據(jù)現(xiàn)有實(shí)驗(yàn)裝置,應(yīng)用拉格朗日方程推導(dǎo)了內(nèi)裝兩個(gè)球的雙自由度球式自動(dòng)平衡裝置在倍頻激勵(lì)作用下的數(shù)學(xué)模型。 2.基于Matlab軟件,應(yīng)用Runge-Kutta算法對(duì)在倍頻激勵(lì)下內(nèi)裝兩球的雙自由度球式自動(dòng)平衡裝置進(jìn)行了參數(shù)化計(jì)算機(jī)仿真,分析了其動(dòng)態(tài)特性。 3.設(shè)計(jì)和構(gòu)建了相應(yīng)的實(shí)驗(yàn)臺(tái),配置了相應(yīng)的振動(dòng)信號(hào)測(cè)試系統(tǒng)。通過(guò)實(shí)驗(yàn)和仿真的對(duì)比,驗(yàn)證了雙球雙自由度球式自動(dòng)平衡裝置在倍頻激勵(lì)作用下的動(dòng)態(tài)特性。
[Abstract]:Rotating machinery is a kind of machinery which is widely used. Because of equipment quality defect and improper maintenance, it will cause various kinds of malfunctions of rotary machinery. Vibration is its main manifestation. Vibration over assembly affects the stable operation of rotating machinery. It can even cause equipment damage, cause heavy economic losses, and sometimes threaten the personal safety of production personnel. The effective way to solve this problem is to balance the rotor with high precision. In the past, Most of them are static balance methods. However, this method has the advantages of large workload, low efficiency and strong skill. In order to avoid the above disadvantages, the rotary machinery working at the supercritical speed, People began to use passive automatic balancing device, one of which is ball automatic balancing device. At present, both at home and abroad, the research on the ball automatic balancing device only considers the balance effect of the ball on the vibration caused by the eccentric mass. The inertial force generated by the eccentric mass is a fundamental frequency excitation. In fact, frequency-doubling excitation is also the main cause of mechanical vibration. It is of great significance to study the dynamic characteristics of spherical automatic balancing device under frequency doubling excitation. In this paper, the theoretical, simulation and experimental research on the dynamic characteristics of ball automatic balancing device under double frequency excitation is carried out. The main contents of this paper are as follows:. 1. The causes of the frequency doubling excitation and the corresponding vibration characteristics are analyzed, and the dynamic analysis of the ball rotor is carried out. The mathematical model of a double degree of freedom spherical automatic balancing device with two spheres is derived by using Lagrange equation under the action of frequency doubling excitation. 2. Based on Matlab software, the parameterized computer simulation of a two-degree-of-freedom spherical automatic balancing device with two balls under frequency doubling excitation is carried out by using Runge-Kutta algorithm, and its dynamic characteristics are analyzed. 3. The corresponding experimental platform is designed and constructed, and the corresponding vibration signal testing system is configured, and the dynamic characteristics of the double sphere double degree of freedom ball automatic balancing device under the action of frequency doubling excitation are verified by the comparison of experiment and simulation.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH113.25

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本文編號(hào)：1550091