本文關(guān)鍵詞：齒輪耦合的壓縮機(jī)轉(zhuǎn)子系統(tǒng)動(dòng)力學(xué)特性研究　出處：《東北大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 轉(zhuǎn)子系統(tǒng) 齒輪耦合 聯(lián)軸器不對(duì)中 振動(dòng)特性

【摘要】：在含有齒輪傳動(dòng)的高速轉(zhuǎn)子系統(tǒng)中,進(jìn)行轉(zhuǎn)子系統(tǒng)的動(dòng)力學(xué)分析時(shí)應(yīng)該充分的考慮到齒輪的嚙合作用。齒輪間的徑向力、切向力會(huì)同時(shí)引起轉(zhuǎn)子系統(tǒng)的彎曲振動(dòng)及扭轉(zhuǎn)振動(dòng),即而引起轉(zhuǎn)子系統(tǒng)的彎扭耦合振動(dòng)。此外,轉(zhuǎn)子系統(tǒng)因可能包含多個(gè)齒輪嚙合單元,而各單元的齒輪形式不一,且因?yàn)楦鱾鬟f軸轉(zhuǎn)速和轉(zhuǎn)向也不盡相同,使得帶有齒輪嚙合的轉(zhuǎn)子系統(tǒng)的耦合振動(dòng)問題變得更加復(fù)雜。 本文主要研究的是含齒輪壓縮機(jī)轉(zhuǎn)子系統(tǒng)的振動(dòng)特性問題,即運(yùn)用轉(zhuǎn)子動(dòng)力學(xué)理論和有限元理論,分別研究了壓縮機(jī)子轉(zhuǎn)子系統(tǒng)、整機(jī)轉(zhuǎn)子系統(tǒng)在不同情況下的振動(dòng)特性。本文的工作主要包括以下幾個(gè)方面： (1)介紹了轉(zhuǎn)子系統(tǒng)動(dòng)力學(xué)的基本理論及本文所用到ANSYS相關(guān)單元,在對(duì)現(xiàn)有文獻(xiàn)整理總結(jié)的基礎(chǔ)上,推導(dǎo)了直齒輪及幾種斜齒輪嚙合剛度矩陣的具體表達(dá)形式。 (2)建立了齒輪增速機(jī)的動(dòng)力學(xué)分析模型,考慮在不同嚙合剛度矩陣下系統(tǒng)固有特性的差別,并分析螺旋角及輪齒嚙合剛度的變化對(duì)齒輪轉(zhuǎn)子系統(tǒng)固有特性、穩(wěn)定性及振動(dòng)響應(yīng)的影響。 (3)通過對(duì)技術(shù)圖紙的簡(jiǎn)化,建立了H518齒輪壓縮機(jī)整機(jī)轉(zhuǎn)子系統(tǒng)的有限元分析模型。并分別對(duì)高壓端轉(zhuǎn)子系統(tǒng)、低壓端轉(zhuǎn)子系統(tǒng)及整機(jī)轉(zhuǎn)子系統(tǒng)的彎曲、扭轉(zhuǎn)及彎扭耦合振動(dòng)分別進(jìn)行分析,研究因齒輪的嚙合作用導(dǎo)致的系統(tǒng)固有特性的變化。 (4)對(duì)系統(tǒng)進(jìn)行穩(wěn)定性分析,并根據(jù)API標(biāo)準(zhǔn)進(jìn)行加載,進(jìn)行不平衡響應(yīng)分析,得到系統(tǒng)在不同加載方式下的振動(dòng)響應(yīng)情況。 (5)推導(dǎo)了轉(zhuǎn)子系統(tǒng)聯(lián)軸器偏角不對(duì)中及平行不對(duì)中故障的動(dòng)力學(xué)模型,介紹了兩種不對(duì)中故障不對(duì)中力的計(jì)算方法,對(duì)不同程度不對(duì)中故障下轉(zhuǎn)子系統(tǒng)的振動(dòng)響應(yīng)進(jìn)行了仿真分析。 最后得出因齒輪的耦合作用,含齒輪嚙合的轉(zhuǎn)子系統(tǒng)與單軸分析相比,會(huì)產(chǎn)生新的頻率成分,振型也會(huì)發(fā)生變化。通過共振區(qū)、穩(wěn)定性及響應(yīng)分析確定H518壓縮機(jī)組的工作安全。具有不對(duì)中故障的轉(zhuǎn)子系統(tǒng)的振動(dòng)頻譜中會(huì)出現(xiàn)工頻和二倍頻成分,不對(duì)中越嚴(yán)重,二倍頻所占比例越大；在不對(duì)中故障狀態(tài)下,轉(zhuǎn)子的軸心軌跡呈現(xiàn)香蕉形或內(nèi)外八字形。
[Abstract]:In the high speed rotor system with gear transmission , the meshing action of the gear should be fully taken into account in the dynamic analysis of the rotor system . The radial force and tangential force between gears can cause bending vibration and torsional vibration of the rotor system at the same time , that is , the torsional coupling vibration of the rotor system is caused . In addition , the rotor system can include a plurality of gear engaging units , and the gear forms of the units are different , and the coupling vibration problem of the rotor system with gear meshing becomes more complicated because the rotating speed and the steering of each transmission shaft are different . This paper mainly studies the vibration characteristics of the rotor system of the gear - containing compressor , that is , the rotor dynamics theory and the finite element theory are used to study the vibration characteristics of the rotor system of the compressor and the rotor system of the whole machine in different situations . The work of this paper mainly includes the following aspects : ( 1 ) The basic theory of the dynamics of the rotor system and the relevant unit of ANSYS are introduced . On the basis of summarizing the existing literatures , the concrete expressions of the meshing stiffness matrix of spur gears and several helical gears are derived . ( 2 ) The dynamic analysis model of gear speed increaser is established , considering the difference of the inherent characteristics of the system under different meshing stiffness matrix , and analyzing the influence of helix angle and gear meshing stiffness on the inherent characteristics , stability and vibration response of the gear rotor system . ( 3 ) Based on the simplification of the technical drawings , the finite element analysis model of the rotor system of H518 gear compressor is established . The bending , torsion and torsional coupling vibration of the high pressure end rotor system , the low pressure end rotor system and the whole machine rotor system are respectively analyzed , and the inherent characteristics of the system due to the meshing of gears are studied . ( 4 ) analyzing the stability of the system , loading the system according to the API standard , carrying out unbalance response analysis , and obtaining the vibration response of the system under different loading modes . ( 5 ) The dynamic model of the rotor system coupling deflection angle misalignment and the parallel misalignment is derived . The calculation method of the middle force is introduced , and the vibration response of the rotor system is simulated and analyzed in different degrees . It is concluded that the rotor system with gear meshing can produce new frequency component compared with single - axis analysis because of the coupling effect of gear . The working safety of H518 compressor unit can be determined by resonance region , stability and response analysis .

【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH45

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