【摘要】：扭轉(zhuǎn)振動是旋轉(zhuǎn)類機械運動的一種普遍形式,其對軸系的傳動精度帶來很大的影響。對于各種加工機床,振動是普遍存在于各個機械運動領(lǐng)域的,而滾珠絲杠是數(shù)控機床的主要傳動部件,直接參與機床加工,其動態(tài)特性對切削穩(wěn)定性和機床加工水平有很大的影響。因此,對于軸系在扭振負荷作用下的動力學響應(yīng)特性進行分析與研究就顯得非常有必要,同時,研究結(jié)果對提高機床的加工精度有重要意義。 本文針對軸系扭負荷狀態(tài),建立軸系扭振激勵和檢測試驗的模擬試驗臺,設(shè)計軸系扭振信號采集、分離和數(shù)據(jù)分析計算方法,并分析了軸系在扭負荷作用下的角位移變化和補償關(guān)系。歸結(jié)起來,進行了如下幾個方面的工作： 1.針對軸系扭負荷狀態(tài)設(shè)計了扭振激勵和檢測模擬試驗臺。設(shè)計了軸系典型扭負荷發(fā)生模擬系統(tǒng)和響應(yīng)的檢測系統(tǒng)。通過電渦流傳感器、飛輪、齒形輪的組合,在飛輪上施加沖擊負荷,在齒形輪上通過調(diào)制作用拾取扭振信號,使用脈沖時序法解調(diào)扭振信號。在齒輪上的電渦流傳感器得到的信號是類正弦信號。實驗表明,試驗臺軸系能夠正確傳遞扭振信息。 2.建立了數(shù)據(jù)采集和處理系統(tǒng)。在計算機安裝數(shù)據(jù)采集卡進行多通道同步數(shù)據(jù)采樣。根據(jù)數(shù)據(jù)過零點的位置判斷時序脈沖的起始和終止點,建立脈沖時序序列,然后把所得數(shù)據(jù)在標準數(shù)據(jù)分析處理軟件中進行數(shù)據(jù)分析和處理。 3.采用不同材質(zhì)的材料對飛輪進行了等沖力的沖擊作用,在齒形輪上和軸承端部觀察了橫振和扭振作用的傳輸狀態(tài)。 4.使用ANSYS建立了滾珠絲杠簡化模型,并對其進行了靜態(tài)扭振分析。
[Abstract]:Torsional vibration is a universal form of rotating mechanical motion, which has great influence on the transmission accuracy of shafting. For all kinds of machine tools, vibration is common in all fields of mechanical movement, and ball screw is the main transmission part of NC machine tool, and it is directly involved in the machining of machine tool. Its dynamic characteristics have great influence on cutting stability and machining level of machine tools. Therefore, it is necessary to analyze and study the dynamic response characteristics of shafting under torsional vibration load. At the same time, the research results are of great significance to improve the machining accuracy of machine tools. In this paper, according to the torsional load state of shafting, a simulated test bed for excitation and testing of torsional vibration of shafting is established, and a method for collecting, separating and calculating the torsional vibration signals of shafting is designed. The angular displacement and compensation relation of shafting under torsional load are analyzed. To sum up, the following aspects of work were carried out: 1. A torsional vibration excitation and testing simulator is designed for shafting torsional load state. A typical torsional load generation simulation system and a response detection system are designed. Through the combination of eddy current sensor, flywheel and tooth wheel, the impulse load is applied on the flywheel, and the torsional vibration signal is picked up by modulating action on the gear, and the torsional vibration signal is demodulated by pulse timing method. The signal obtained from the eddy current sensor on the gear is a sinusoidal signal. The experimental results show that the shaft system of the test stand can transfer torsional vibration information correctly. 2. A data acquisition and processing system is established. The data acquisition card is installed on the computer for multi-channel synchronous data sampling. According to the position of the zero-crossing point, the starting and ending point of the sequential pulse is judged, and the pulse sequence is established, then the data is analyzed and processed in the standard data analysis and processing software. 3. The impingement of equal impulse on the flywheel with different materials was carried out. The transmission state of transverse and torsional vibration was observed on the gear and at the end of the bearing. 4. The simplified model of ball screw is established by ANSYS, and its static torsional vibration is analyzed.
【學位授予單位】：沈陽工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH132

【參考文獻】

相關(guān)期刊論文 前5條

1 李松生 ,楊柳欣 ,王兵華;高速電主軸軸系轉(zhuǎn)子動力學特性分析[J];軸承;2002年02期

2 陳錦濤;汽輪發(fā)電機軸系扭轉(zhuǎn)振動固有頻率計算數(shù)學模型[J];江蘇電機工程;2004年01期

3 王正，，李德玉;大型汽輪發(fā)電機轉(zhuǎn)子的扭振�；捌鋵嶒烌炞C[J];中國電機工程學報;1994年01期

4 邱家俊;電機的機電耦聯(lián)與磁固耦合非線性振動研究[J];中國電機工程學報;2002年05期

5 傅忠廣,楊昆,宋之平,陳椿芳;汽輪發(fā)電機組軸系扭振的激光測試技術(shù)[J];現(xiàn)代電力;2001年01期

相關(guān)碩士學位論文 前4條

1 郭鋼利;汽輪發(fā)電機組軸系扭振測量與分析[D];華北電力大學（北京）;2005年

2 郭慧東;汽輪發(fā)電機組軸系扭振分析及機電系統(tǒng)仿真[D];華北電力大學（北京）;2005年

3 徐洪志;旋轉(zhuǎn)機械軸系扭振測量研究[D];清華大學;2005年

4 藺蒙;類發(fā)電機轉(zhuǎn)子彎扭耦合振動特性的研究[D];華北電力大學;2000年

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