本文選題：行星齒輪傳動系統(tǒng) + 剛柔耦合模型��； 參考：《天津工業(yè)大學》2017年碩士論文

【摘要】：針對風電機組齒輪傳動系統(tǒng)中故障信號復雜、微弱而難以識別的問題,從齒輪箱內部動態(tài)激勵和箱體表面振動響應信號出發(fā),總結了不同故障狀態(tài)下的故障特征。并通過傳遞特性分析,揭示故障激勵的傳遞特性及各級嚙合之間的連帶影響關系,為含行星輪系的多級齒輪傳遞系統(tǒng)故障診斷提供了理論基礎和依據(jù)。以風電機組故障模擬試驗臺為研究對象,分別建立正常狀態(tài)、定軸齒輪裂紋故障狀態(tài)、行星齒輪缺齒故障狀態(tài)、行星齒輪磨損故障狀態(tài)、定軸齒輪齒根裂紋-行星齒輪缺齒耦合故障及定軸齒輪齒根裂紋-行星齒輪均勻磨損耦合故障狀態(tài)下試驗臺系統(tǒng)的三維實體剛柔耦合模型。通過動力學仿真得到對應故障狀態(tài)下箱體內部各對齒輪嚙合處的嚙合接觸力信號,揭示多級傳動系統(tǒng)中3種單故障、2種耦合故障情況下系統(tǒng)內部激勵信號故障特征,對實驗所測得的箱體表面振動信號具有指導意義。故障狀態(tài)下箱體表面振動信號成分復雜,且同一故障的故障特征在不同測點反映情況不同,這涉及到振動信號由箱體內部傳遞至箱體表面時經(jīng)不同路徑而引起的變化。依據(jù)系統(tǒng)辨識方法及理論,以上述動力學仿真所得箱體內部輪齒嚙合接觸力力信號作為輸入,以實驗所測箱體表面振動響應作為輸出,建立信號不同路徑下傳遞函數(shù)模型。通過正常及不同故障狀態(tài)下系統(tǒng)的傳遞特性進行分析,依據(jù)各傳遞路徑的成分組成、幅值變化以及貢獻量大小,揭示齒輪內部接觸力信號傳遞至箱體表面響應點過程中的對應路徑之間相互影響的連帶關系及由此引發(fā)的連帶故障傳遞特性,實現(xiàn)了多級齒輪傳動系統(tǒng)單一故障、耦合故障狀態(tài)下故障特征的輔助識別。
[Abstract]:Aiming at the problem that the fault signal in the gear transmission system of wind turbine is complex, weak and difficult to identify, the fault characteristics of different fault states are summarized from the dynamic excitation inside the gear box and the response signal of the surface vibration of the box. Through the analysis of the transmission characteristics, the transmission characteristics of the fault excitation and the joint and several influence relationship between the meshing of all levels are revealed, which provides a theoretical basis and basis for the fault diagnosis of the multi-stage gear transmission system with planetary gear trains. Taking the wind turbine fault simulation test-bed as the research object, the normal state, the fault state of fixed axis gear crack, the fault state of planetary gear missing tooth and the fault state of planetary gear wear are established respectively. Three-dimensional solid rigid-flexible coupling model of the test-bed system under the condition of the tooth root crack of fixed axis gear and the coupling fault of planetary gear tooth root crack and uniform wear of planetary gear. Through dynamic simulation, the meshing contact force signals of each pair of gears in the box body under the corresponding fault state are obtained, and the fault characteristics of the internal excitation signals in the case of three kinds of single faults and two kinds of coupling faults in the multistage transmission system are revealed. It is of guiding significance for the vibration signal of the surface of the box measured by the experiment. The vibration signal components of the surface of the box are complex in the fault state, and the fault characteristics of the same fault are different in different measuring points, which involves the change of the vibration signal from the inside of the box to the surface of the box through different paths. According to the system identification method and theory, the signal of meshing contact force of the inner gear teeth is taken as input, and the vibration response of the box surface measured by experiment is taken as the output. The transfer function model under different paths of the signal is established. By analyzing the transfer characteristics of the system under normal and different fault conditions, according to the composition, amplitude change and contribution of each transfer path, The relationship between the corresponding paths during the transmission of the contact force signal to the response point on the surface of the box and the associated fault transmission characteristics caused by it are revealed. The single fault of the multistage gear transmission system is realized. Assistant recognition of fault characteristics in coupled fault state.
【學位授予單位】：天津工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM614;TH132.41

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