本文選題：風(fēng)力發(fā)電機(jī) + 齒輪裂紋　； 參考：《沈陽工業(yè)大學(xué)》2017年碩士論文

【摘要】：增速齒輪傳動系統(tǒng)是風(fēng)力發(fā)電機(jī)的核心部件,齒輪箱故障會導(dǎo)致整個風(fēng)機(jī)停機(jī)。齒輪傳動系統(tǒng)故障中齒輪類故障占主要部分,局部故障又是引發(fā)齒輪類故障的最重要原因之一,包括裂紋、崩齒等,而裂紋又是其中最難識別、最易發(fā)生的類型。因此,為了防止因齒輪裂紋引起輪齒折斷造成的生產(chǎn)事故,有必要對齒輪裂紋的相關(guān)特性進(jìn)行研究。本文以1.5MW風(fēng)力發(fā)電機(jī)高速級漸開線直齒輪副為研究對象,由于高速級齒輪運(yùn)轉(zhuǎn)速度快,載荷較大,溫度對齒輪的影響具有重大研究意義,本文基于熱分析對齒輪裂紋力學(xué)特性進(jìn)行研究,主要內(nèi)容如下:基于ANSYS有限元分析軟件環(huán)境下,分別建立無裂紋漸開線直齒輪副和含裂紋漸開線直齒輪副三維模型。在靜力學(xué)分析基礎(chǔ)上對二者進(jìn)行冷態(tài)分析,研究其接觸特性和時變嚙合剛度。比較二者的分析結(jié)果,分析裂紋對齒輪的影響,通過改變裂紋的基本參數(shù),更進(jìn)一步得出裂紋對齒輪特性影響的相關(guān)規(guī)律�？紤]溫度對齒輪裂紋的影響,基于熱分析對熱態(tài)齒輪裂紋靜力學(xué)特性進(jìn)行研究,觀察其熱行為規(guī)律,與冷態(tài)分析結(jié)果進(jìn)行比較,接觸應(yīng)力應(yīng)變和嚙合剛度都會因熱變形現(xiàn)象發(fā)生改變,結(jié)果顯示熱態(tài)齒輪裂紋對齒輪接觸特性影響更加敏感,分析結(jié)果更加符合實(shí)際情況。在靜力學(xué)分析基礎(chǔ)上,采用集中參數(shù)法建立直齒輪動力學(xué)模型,考慮溫度變化情況,將有限元法計算得到的熱態(tài)齒輪時變嚙合剛度導(dǎo)入到模型中,利用MATLAB軟件對不同深度裂紋和不同工作情況下的齒輪動態(tài)響應(yīng)進(jìn)行編程求解,根據(jù)結(jié)果對基于熱分析的齒輪裂紋動力學(xué)性能進(jìn)行研究。通過對含裂紋的齒輪在正常工作環(huán)境下的相關(guān)特性進(jìn)行的分析,為齒輪能夠高速、平穩(wěn)運(yùn)轉(zhuǎn)提供理論依據(jù),對理解齒輪產(chǎn)生振動噪聲的原因和齒輪故障診斷研究具有更深刻意義。
[Abstract]:The speed-increasing gear drive system is the core part of the wind turbine. The gearbox failure will cause the fan to stop.Gear fault is the main part of gear transmission system fault, and local fault is one of the most important causes of gear fault, including crack, tooth collapse and so on, and crack is the most difficult to identify, the most prone to occur type.Therefore, in order to prevent the production accident caused by gear crack, it is necessary to study the characteristics of gear crack.In this paper, the high speed involute spur gear pair of 1.5MW wind turbine is taken as the research object. Because of the high speed and load of the high speed grade gear, it is of great significance to study the influence of temperature on the gear.The main contents of this paper are as follows: based on ANSYS finite element analysis software, 3D models of cracked involute spur gear pair and cracked involute spur gear pair are established respectively.On the basis of statics analysis, the contact characteristics and time-varying meshing stiffness of the two are studied.By comparing the results of the two analysis, the influence of crack on gear is analyzed. By changing the basic parameters of crack, the correlation law of crack on gear characteristic is obtained.Considering the influence of temperature on gear crack, the static characteristics of hot gear crack were studied based on thermal analysis, and the thermal behavior of the crack was observed and compared with the results of cold analysis.Both contact stress strain and meshing stiffness will change due to thermal deformation. The results show that the hot gear crack is more sensitive to the contact characteristics of the gear and the analysis results are more in line with the actual situation.On the basis of static analysis, the dynamic model of spur gear is established by means of lumped parameter method. Considering the change of temperature, the time-varying meshing stiffness of hot gear calculated by finite element method is introduced into the model.The dynamic response of gears with different depth cracks and different working conditions was solved by MATLAB software, and the dynamic behavior of gear cracks based on thermal analysis was studied according to the results.By analyzing the related characteristics of cracked gears in normal working environment, the theoretical basis is provided for the gears to run at high speed and smoothly.It is of great significance to understand the causes of gear vibration and noise and the research of gear fault diagnosis.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM315;TH132.41

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