【摘要】：行星齒輪箱通常在惡劣環(huán)境下工作,行星齒輪箱中的齒輪失效是導(dǎo)致機械系統(tǒng)故障的主要原因之一。在行星齒輪箱運轉(zhuǎn)過程中使用在線監(jiān)測和故障診斷技術(shù)可以有效的預(yù)防重大事故,降低機器的維護成本。研究行星齒輪動力學(xué)模型及故障影響特征,具有重要意義。1、行星齒輪動力學(xué)分析。使用CATIA軟件建立行星齒輪箱三維模型。使用ANSYS軟件分析行星齒輪箱振動模態(tài),各階頻率范圍內(nèi)的系統(tǒng)振型。研究不同程度故障對齒輪模態(tài)的影響,并對不同程度故障狀態(tài)下嚙合的齒輪做瞬態(tài)動力學(xué)分析,分析故障齒輪上的應(yīng)力分布情況,為后期實驗人為破壞齒輪故障位置的選擇以及故障程度的選擇提供了幫助。2、行星齒輪動力學(xué)仿真�；贏DAMS軟件建立行星齒輪箱動力學(xué)模型,對行星輪系做多體動力學(xué)仿真,獲得行星齒輪箱不同狀態(tài)時輸入軸的扭矩變化頻域圖。其次,分析頻域圖得到行星齒輪箱的轉(zhuǎn)頻、嚙合頻率和故障頻率,診斷出行星齒輪箱故障及其故障類型。最后,將仿真結(jié)果與理論計算結(jié)果進行對比分析。3、基于扭振信號的行星齒輪故障診斷。搭建行星齒輪箱故障診斷實驗平臺,采集行星齒輪箱橫向振動信號以及扭轉(zhuǎn)振動信號。通過對行星齒輪箱橫向振動信號與扭振信號的頻譜對比與分析發(fā)現(xiàn),扭振信號比橫向振動信號更適合與行星輪系的故障診斷。針對扭振信號微弱,沖擊特性不明顯等特性,提出基于最大相關(guān)峭度反褶積法處理扭振信號。該方法使行星齒輪箱扭振信號的故障沖擊特性得到顯著提升,對于扭振信號的降噪與提高周期故障沖擊特征有效,適用于行星齒輪箱扭振信號的故障診斷。
[Abstract]:Planetary gearbox usually works in bad environment. The failure of gear in planetary gearbox is one of the main causes of mechanical system failure. The use of on-line monitoring and fault diagnosis technology in the operation of planetary gearbox can effectively prevent serious accidents and reduce the maintenance cost of the machine. It is of great significance to study the dynamic model and fault characteristics of planetary gear. 1. The three-dimensional model of planetary gearbox was established by using CATIA software. ANSYS software is used to analyze the vibration modes of planetary gearbox and the system modes in the range of each order frequency. The influence of different faults on gear mode is studied, and the transient dynamic analysis of gear meshing under different degree of fault is done, and the stress distribution on the fault gear is analyzed. It is helpful for the later experiment to choose the fault location and the fault degree of the failure gear. 2. Planetary gear dynamics simulation. Based on the ADAMS software, the dynamic model of planetary gearbox is established, and the multi-body dynamics simulation of planetary gear train is done. The frequency domain diagram of torque variation of planetary gearbox in different states is obtained. Secondly, the frequency, meshing frequency and fault frequency of the planetary gearbox are obtained by analyzing the frequency domain diagram, and the fault types of the planetary gearbox are diagnosed. Finally, the simulation results are compared with the theoretical results. 3, the planetary gear fault diagnosis based on torsional vibration signal. An experimental platform for fault diagnosis of planetary gearbox is set up to collect transverse vibration signal and torsional vibration signal of planetary gearbox. By comparing and analyzing the frequency spectrum of the transverse vibration signal and the torsional vibration signal of the planetary gear box, it is found that the torsional vibration signal is more suitable for fault diagnosis with the planetary gear train than the transverse vibration signal. Aiming at the weak torsional vibration signals and the weak impact characteristics, a method based on maximum correlation kurtosis deconvolution is proposed to process torsional vibration signals. This method can significantly improve the fault impact characteristics of torsional vibration signal of planetary gear box. It is effective for noise reduction of torsional vibration signal and improvement of periodic fault shock characteristic. It is suitable for fault diagnosis of torsional vibration signal of planetary gear box.
【學(xué)位授予單位】：南昌航空大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TH132.425

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