本文選題：自消除間隙　切入點：磁懸浮軸承　出處：《南京航空航天大學》2014年碩士論文　論文類型：學位論文

【摘要】：本文針對一種可以自動消除滾動軸承外圈徑向間隙的新型保護軸承機構(gòu)裝置，研究轉(zhuǎn)子跌落在自動消除間隙保護軸承的動力學特性。首先簡述了自消除間隙保護軸承裝置的工作原理，，并在此基礎(chǔ)上分析轉(zhuǎn)子組件跌落到裝置上的運動形式，轉(zhuǎn)子組件跌落到自消除間隙保護軸承機構(gòu)上的碰撞運動以及建立了轉(zhuǎn)子組件和支撐座分體碰撞的碰撞力模型，從理論上求解得出轉(zhuǎn)子組件跌落后的最大振動位移、軸承內(nèi)部碰撞力、支座與軸承外圈的碰撞力以及支座與銷釘之間的碰撞力。采用Pro/E對轉(zhuǎn)子組件和自消除間隙機構(gòu)進行建模利用多體動力學軟件ADAMS進行了動力學的仿真分析，分析機構(gòu)不同參數(shù)（轉(zhuǎn)子的不平衡量、軸承的游隙、支撐座表面摩擦系數(shù)、支撐座的轉(zhuǎn)動慣量以及支撐座與定位銷的摩擦等）對轉(zhuǎn)子組件跌落后動力學行為的影響，根據(jù)得到的仿真結(jié)果對保護軸承裝置進行參數(shù)改進。在實驗室現(xiàn)有的五自由度磁懸浮軸承試驗臺上，搭建了一個專門用于轉(zhuǎn)子組件跌落的試驗平臺，分別對三組不同參數(shù)的自動消除間隙保護軸承進行跌落試驗，并利用電渦流傳感器測得轉(zhuǎn)子組件跌落的位移信號和光纖傳感器測得轉(zhuǎn)子組件的外圈轉(zhuǎn)速信號，分析得到轉(zhuǎn)子組件跌落到不同參數(shù)保護軸承上的動力學行為。改進參數(shù)后的自消除間隙保護軸承機構(gòu)相比于傳統(tǒng)的保護軸承，轉(zhuǎn)子跌落后的振動明顯減小，高頻轉(zhuǎn)速跌落更加可靠。
[Abstract]:This paper aims at a new type of protective bearing mechanism which can automatically eliminate the radial clearance of the outer ring of the rolling bearing. In this paper, the dynamic characteristics of the rotor drop bearing with automatic clearance protection are studied. Firstly, the working principle of the self-canceling clearance protection bearing device is briefly described, and on this basis, the motion form of the rotor component falling onto the device is analyzed. The impact motion of rotor component falling into self-canceling clearance protection bearing mechanism and the collision force model of rotor component and support seat are established. The maximum vibration displacement of rotor component after falling is obtained theoretically. The internal impact force of bearing, the impact force between bearing and bearing outer ring, and the collision force between bearing and pin. The rotor assembly and self-canceling clearance mechanism are modeled by Pro/E and the dynamic simulation analysis is carried out by using the multi-body dynamics software ADAMS. The effects of different mechanism parameters (rotor unbalance, bearing clearance, friction coefficient on the surface of support seat, moment of inertia of support seat and friction between support seat and pin, etc.) on the dynamic behavior of rotor components after falling are analyzed. According to the simulation results, the parameters of the protective bearing device are improved. A special test platform for rotor component drop is set up on the existing five degree of freedom maglev bearing test bed in the laboratory. The drop test of three groups of automatic eliminating clearance protection bearings with different parameters was carried out, and the displacement signal of rotor component drop was measured by eddy current sensor and the speed signal of outer ring of rotor assembly was measured by optical fiber sensor. The dynamic behavior of rotor assembly falling onto the bearing with different parameters is analyzed. Compared with the traditional protection bearing, the vibration of the self-canceling clearance protection bearing mechanism with improved parameters is obviously reduced. High frequency speed drop is more reliable.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TH133.33

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