本文關(guān)鍵詞： 初始彎曲 轉(zhuǎn)子系統(tǒng) 動(dòng)平衡　出處：《浙江大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：目前,高速旋轉(zhuǎn)機(jī)械已經(jīng)越來越廣泛的使用于國民生產(chǎn)的各個(gè)部門,成為其中的重要關(guān)鍵設(shè)備,而轉(zhuǎn)子系統(tǒng)則是高速旋轉(zhuǎn)機(jī)械中的核心組成部分。轉(zhuǎn)子在運(yùn)行過程中,由于各種原因?qū)е缕渲行膽T性主軸偏離了旋轉(zhuǎn)軸,從而產(chǎn)生了不平衡,這種不平衡狀態(tài)會(huì)嚴(yán)重影響轉(zhuǎn)子的正常運(yùn)行,甚至對(duì)相關(guān)設(shè)備造成損壞。導(dǎo)致轉(zhuǎn)子系統(tǒng)產(chǎn)生不平衡的原因有很多,對(duì)于其過大的工頻振動(dòng)方面,主要是由轉(zhuǎn)子質(zhì)量偏心和初始彎曲引起的。對(duì)于前者已有較為成熟的動(dòng)平衡方法,但長期水平擱置或者環(huán)境溫度的不均勻都會(huì)導(dǎo)致轉(zhuǎn)子產(chǎn)生一定程度的初始彎曲,對(duì)于此類具有初始彎曲的轉(zhuǎn)子系統(tǒng),采用傳統(tǒng)的動(dòng)平衡方法已經(jīng)不能很好的解決其在運(yùn)行過程中不平衡振動(dòng)過大的問題,故本文所研究的針對(duì)具有初始彎曲轉(zhuǎn)子系統(tǒng)的動(dòng)平衡方法對(duì)于解決此類問題有很大的幫助,這在實(shí)際的工程應(yīng)用中也是具有非常廣闊的前景的。 本文首先建立了具有初始彎曲轉(zhuǎn)子系統(tǒng)的數(shù)學(xué)模型,再通過相關(guān)具體計(jì)算得出具有初始彎曲轉(zhuǎn)子系統(tǒng)一般性的振動(dòng)響應(yīng)特征,然后根據(jù)這些特征提出了一種基于模態(tài)平衡的單平面加校正量的動(dòng)平衡方法,用于平衡具有初始彎曲的轉(zhuǎn)子系統(tǒng),經(jīng)過仿真計(jì)算證明該方法是正確、有效的；接著本文又研究出了一種一次試重在線識(shí)別初始彎曲的方法,這種方法在實(shí)驗(yàn)或?qū)嶋H工程中對(duì)轉(zhuǎn)子系統(tǒng)進(jìn)行初始彎曲的識(shí)別是非常簡便和有效的；最后本文通過對(duì)具有初始彎曲的真實(shí)轉(zhuǎn)子系統(tǒng)進(jìn)行動(dòng)平衡實(shí)驗(yàn),采用提出的轉(zhuǎn)子系統(tǒng)初始彎曲的識(shí)別方法成功識(shí)別出了該實(shí)驗(yàn)轉(zhuǎn)子系統(tǒng)的初始彎曲,進(jìn)而又根據(jù)提出的針對(duì)具有初始彎曲轉(zhuǎn)子系統(tǒng)的動(dòng)平衡方法對(duì)該實(shí)驗(yàn)轉(zhuǎn)子系統(tǒng)進(jìn)行動(dòng)平衡,成功驗(yàn)證出該方法在實(shí)際的實(shí)驗(yàn)中確實(shí)能夠起到較好的平衡轉(zhuǎn)子系統(tǒng)初始彎曲的效果,從而證明出該動(dòng)平衡方法在實(shí)際工程的應(yīng)用中是可行的。 總之,本文主要研究具有初始彎曲的轉(zhuǎn)子系統(tǒng),關(guān)鍵是提出了一種針對(duì)具有初始彎曲轉(zhuǎn)子系統(tǒng)的動(dòng)平衡方法,該方法在理論研究和實(shí)驗(yàn)測試中都被證明是正確、有效和可行的,因此該方法的提出對(duì)于實(shí)際工程中的應(yīng)用具有一定的啟發(fā)意義。
[Abstract]:At present, high-speed rotating machinery has been more and more widely used in Yu Guomin production of various departments, which has become an important key equipment. The rotor system is the core part of the high-speed rotating machinery. During the operation of the rotor, the central inertial spindle deviates from the axis of rotation due to various reasons, resulting in imbalance. This unbalanced state will seriously affect the normal operation of the rotor, and even cause damage to the relevant equipment. There are many reasons leading to the imbalance of the rotor system, for its excessive power frequency vibration. It is mainly caused by mass eccentricity and initial bending of the rotor. For the former, a more mature dynamic balancing method has been developed. However, long-term horizontal shelving or environmental temperature inhomogeneity will lead to a certain degree of initial bending of the rotor, for this kind of rotor system with initial bending. The traditional dynamic balancing method can not solve the problem of excessive unbalanced vibration in the process of operation. Therefore, the dynamic balancing method studied in this paper for the rotor system with initial bending is of great help to solve this kind of problem, which has a very broad prospect in practical engineering application. In this paper, the mathematical model of the rotor system with initial bending is first established, and then the general vibration response characteristics of the rotor system with initial bending are obtained by relevant calculation. Then, according to these characteristics, a dynamic balancing method based on modal balance is proposed, which is used to balance rotor system with initial bending. The simulation results show that the method is correct and effective. Then a method to identify the initial bending of the rotor system is developed in this paper. The method is very simple and effective in the experiment or practical engineering. Finally, through the dynamic balance experiment of the real rotor system with initial bending, the initial bending of the experimental rotor system is successfully identified by the proposed method of identifying the initial bending of the rotor system. Then the dynamic balance of the experimental rotor system is carried out according to the proposed dynamic balancing method for the rotor system with initial bending. It is successfully verified that this method can effectively balance the initial bending of rotor system in practical experiments, and it is proved that the dynamic balancing method is feasible in practical engineering. In conclusion, this paper mainly studies the rotor system with initial bending, the key is to propose a dynamic balancing method for the rotor system with initial bending. The method has been proved to be correct, effective and feasible in both theoretical research and experimental test.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH113

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