快猫下载地址

某汽(qi)車變速(su)箱(xiang)箱(xiang)體(ti)振動模態分析

 變(bian)速(su)(su)(su)(su)箱(xiang)(xiang)箱(xiang)(xiang)體(ti)是(shi)汽車(che)傳(chuan)動(dong)(dong)系(xi)統(tong)(tong)中(zhong)重(zhong)(zhong)要(yao)組成部件，是(shi)軸(zhou)承(cheng)、齒(chi)(chi)輪(lun)(lun)(lun)等零部件安裝的(de)基(ji)礎。由(you)于變(bian)速(su)(su)(su)(su)箱(xiang)(xiang)在受到外界激勵時會(hui)產(chan)(chan)生(sheng)振(zhen)(zhen)(zhen)動(dong)(dong)，齒(chi)(chi)輪(lun)(lun)(lun)嚙合過(guo)程(cheng)中(zhong)也會(hui)產(chan)(chan)生(sheng)沖擊，沖擊通過(guo)軸(zhou)和(he)軸(zhou)承(cheng)傳(chuan)遞到齒(chi)(chi)輪(lun)(lun)(lun)箱(xiang)(xiang)體(ti)而(er)引(yin)起箱(xiang)(xiang)體(ti)振(zhen)(zhen)(zhen)動(dong)(dong)。箱(xiang)(xiang)體(ti)振(zhen)(zhen)(zhen)動(dong)(dong)又會(hui)引(yin)起齒(chi)(chi)輪(lun)(lun)(lun)的(de)不對中(zhong)性，加(jia)速(su)(su)(su)(su)齒(chi)(chi)輪(lun)(lun)(lun)表面的(de)磨損(sun)。當齒(chi)(chi)輪(lun)(lun)(lun)嚙合頻率與變(bian)速(su)(su)(su)(su)箱(xiang)(xiang)的(de)固(gu)有頻率接近或吻合時，整個變(bian)速(su)(su)(su)(su)箱(xiang)(xiang)傳(chuan)動(dong)(dong)系(xi)統(tong)(tong)會(hui)發生(sheng)共(gong)振(zhen)(zhen)(zhen)效應(ying)，產(chan)(chan)生(sheng)振(zhen)(zhen)(zhen)動(dong)(dong)和(he)噪(zao)音，這將加(jia)速(su)(su)(su)(su)變(bian)速(su)(su)(su)(su)箱(xiang)(xiang)的(de)疲勞損(sun)傷，影響變(bian)速(su)(su)(su)(su)箱(xiang)(xiang)壽(shou)命。  箱(xiang)(xiang)體(ti)要(yao)承(cheng)受著各種載(zai)荷并產(chan)(chan)生(sheng)應(ying)力和(he)變(bian)形，嚴重(zhong)(zhong)時會(hui)導致變(bian)速(su)(su)(su)(su)箱(xiang)(xiang)系(xi)統(tong)(tong)某(mou)些(xie)關鍵部件的(de)失靈甚至會(hui)引(yin)起齒(chi)(chi)輪(lun)(lun)(lun)系(xi)統(tong)(tong)的(de)故障和(he)損(sun)壞，......

[ 07-29 15:55 ]

干(gan)運行弧齒(chi)錐齒(chi)輪齒(chi)面溫(wen)升分(fen)析

  根據(ju)嚙合(he)與成(cheng)型原理，建立(li)弧(hu)(hu)齒(chi)(chi)(chi)(chi)(chi)錐齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)(lun)齒(chi)(chi)(chi)(chi)(chi)面(mian)(mian)方(fang)(fang)程。采用有限元方(fang)(fang)針方(fang)(fang)法對(dui)弧(hu)(hu)齒(chi)(chi)(chi)(chi)(chi)錐齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)(lun)進行(xing)了(le)(le)加(jia)載接觸分(fen)析(xi)，獲得了(le)(le)弧(hu)(hu)齒(chi)(chi)(chi)(chi)(chi)錐齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)(lun)齒(chi)(chi)(chi)(chi)(chi)面(mian)(mian)10個嚙合(he)點(dian)的(de)(de)(de)接觸正壓(ya)力、相(xiang)對(dui)滑動(dong)速(su)度(du)(du)(du)以及摩(mo)擦(ca)因數(shu)。應用傳熱學原理，在對(dui)摩(mo)擦(ca)熱源與熱傳導參數(shu)分(fen)析(xi)基礎上，建立(li)了(le)(le)弧(hu)(hu)齒(chi)(chi)(chi)(chi)(chi)錐齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)(lun)嚙合(he)非穩態溫度(du)(du)(du)場有限元模(mo)型，仿真分(fen)析(xi)了(le)(le)齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)(lun)干運(yun)行(xing)齒(chi)(chi)(chi)(chi)(chi)面(mian)(mian)溫度(du)(du)(du)場分(fen)布及其隨時間變化規律。結果表明，弧(hu)(hu)齒(chi)(chi)(chi)(chi)(chi)錐齒(chi)(chi)(chi)(chi)(chi)輪(lun)(lun)(lun)干運(yun)行(xing)初(chu)始階(jie)段(duan)，隨著嚙合(he)周(zhou)期的(de)(de)(de)增(zeng)(zeng)加(jia)，齒(chi)(chi)(chi)(chi)(chi)面(mian)(mian)溫度(du)(du)(du)急(ji)(ji)劇上升(sheng)，之后上升(sheng)緩慢，在溫度(du)(du)(du)上升(sheng)的(de)(de)(de)同時還出現與嚙合(he)周(zhou)期相(xiang)對(dui)應的(de)(de)(de)波動(dong)；嚙合(he)轉速(su)增(zeng)(zeng)大(da)使溫度(du)(du)(du)急(ji)(ji)速(su)上升(sheng)的(de)(de)(de)時間延長，同時轉速(su)的(de)(de)(de)增(zeng)(zeng)加(jia)導致......

[ 07-25 16:15 ]

蝸(gua)(gua)輪蝸(gua)(gua)桿齒輪組合機構的傳動精度(du)分析(xi)

  以MCH50加(jia)工中(zhong)(zhong)(zhong)心回轉工作臺為對(dui)象(xiang)，考慮加(jia)工誤(wu)差、偏心誤(wu)差、相位角、負載與變形(xing)等因(yin)素建立了(le)(le)(le)組合機(ji)(ji)構(gou)的傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)精度(du)模型(xing)。通過實(shi)例(li)計算，驗證了(le)(le)(le)該綜合傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)誤(wu)差與實(shi)驗所測結(jie)果基(ji)本一致。在此基(ji)礎上(shang)，分析了(le)(le)(le)二(er)級組合機(ji)(ji)構(gou)中(zhong)(zhong)(zhong)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)比(bi)(bi)以及齒輪傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)中(zhong)(zhong)(zhong)心距等對(dui)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)精度(du)的影響。  蝸(gua)輪蝸(gua)桿和(he)(he)齒輪組合的二(er)級傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)構(gou)由于同時具有(you)了(le)(le)(le)齒輪傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)的傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)功率(lv)大(da)、效(xiao)率(lv)高(gao)、壽命長(chang)、傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)比(bi)(bi)準確、結(jie)構(gou)緊湊和(he)(he)蝸(gua)輪蝸(gua)桿傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)的傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)比(bi)(bi)大(da)和(he)(he)反向自鎖(suo)等優點而被廣泛應用。隨(sui)著科學技術的發展，對(dui)二(er)級組合機(ji)(ji)構(gou)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)(dong)(dong)精度(du)的要求越來越高(gao)。  目(mu)前，對(dui)于蝸(gua)......

[ 07-21 17:11 ]

自(zi)動消除齒(chi)輪齒(chi)條齒(chi)側間隙(xi)的機(ji)構(gou)設計

  齒(chi)輪齒(chi)條(tiao)穿(chuan)洞中往(wang)往(wang)存在(zai)齒(chi)側(ce)(ce)間隙(xi)(xi)，為了傳(chuan)(chuan)(chuan)(chuan)動(dong)(dong)機(ji)構(gou)的(de)(de)雙(shuang)(shuang)向(xiang)傳(chuan)(chuan)(chuan)(chuan)動(dong)(dong)精(jing)(jing)度必須消(xiao)除間隙(xi)(xi)。設(she)計了一種通過絲(si)杠螺母機(ji)構(gou)軸向(xiang)的(de)(de)相對位(wei)移來帶動(dong)(dong)與(yu)齒(chi)輪相嚙(nie)合的(de)(de)兩(liang)個齒(chi)條(tiao)，使兩(liang)齒(chi)條(tiao)出現一個軸向(xiang)的(de)(de)相對位(wei)移，即兩(liang)齒(chi)條(tiao)錯(cuo)齒(chi)，使當量齒(chi)厚增(zeng)大(da)，從而自動(dong)(dong)消(xiao)除齒(chi)側(ce)(ce)間隙(xi)(xi)的(de)(de)機(ji)構(gou)。該機(ji)構(gou)已成(cheng)功應用(yong)于齒(chi)輪齒(chi)條(tiao)傳(chuan)(chuan)(chuan)(chuan)動(dong)(dong)的(de)(de)回轉(zhuan)工作臺，結(jie)構(gou)簡單、傳(chuan)(chuan)(chuan)(chuan)動(dong)(dong)精(jing)(jing)度高(gao)、效果顯著。  在(zai)無(wu)間隙(xi)(xi)傳(chuan)(chuan)(chuan)(chuan)動(dong)(dong)的(de)(de)數(shu)控機(ji)床設(she)備(bei)及(ji)機(ji)器人領域，經常用(yong)到齒(chi)輪齒(chi)條(tiao)副傳(chuan)(chuan)(chuan)(chuan)動(dong)(dong)。但齒(chi)輪齒(chi)條(tiao)傳(chuan)(chuan)(chuan)(chuan)動(dong)(dong)過程中往(wang)往(wang)存在(zai)著齒(chi)側(ce)(ce)間隙(xi)(xi)，影響雙(shuang)(shuang)向(xiang)傳(chuan)(chuan)(chuan)(chuan)動(dong)(dong)精(jing)(jing)度。目前消(xiao)除齒(chi)輪條(tiao)機(ji)構(gou)的(de)(de)間隙(xi)(xi)通常采用(yong)的(de)(de)方法是雙(shuang)(shuang)片(pian)薄齒(chi)輪錯(cuo)齒(chi)調整(zheng)......

[ 07-15 16:05 ]

RV精密減速器綜合(he)參數測(ce)量機的研制

研制一臺RV精密減(jian)速(su)器(qi)綜合性能(neng)參數(shu)測(ce)量(liang)機(ji)，實現對RV減(jian)速(su)器(qi)傳動誤差、回差、剛度和摩擦力矩等(deng)參數(shu)的測(ce)量(liang)。儀器(qi)主(zhu)(zhu)要由機(ji)械結構設(she)計(ji)、測(ce)控系統和測(ce)量(liang)軟(ruan)件構成，通過(guo)一次裝夾可以快速(su)、準確地獲得RV減(jian)速(su)器(qi)的多項(xiang)參數(shu)。機(ji)械結構設(she)計(ji)主(zhu)(zhu)要包(bao)括基(ji)座、輸(shu)入組(zu)件、輸(shu)出組(zu)件和RV減(jian)速(su)器(qi)安(an)裝支(zhi)架組(zu)成。......

[ 07-11 16:14 ]

基于ADAMS的(de)主動(dong)齒輪軸(zhou)承安裝(zhuang)距的(de)振動(dong)性能研(yan)究

以某(mou)微(wei)車(che)后(hou)橋(qiao)(qiao)主(zhu)減(jian)速器(qi)主(zhu)、被(bei)動齒軸(zhou)承(cheng)安裝(zhuang)距引起(qi)后(hou)橋(qiao)(qiao)振動為研究(jiu)對象，為了(le)(le)優化主(zhu)、被(bei)動齒軸(zhou)承(cheng)安裝(zhuang)距對振動噪聲的影響(xiang)和(he)提(ti)高主(zhu)、被(bei)動齒軸(zhou)承(cheng)使用壽(shou)命(ming)。通過三維(wei)建模和(he)ADAMS動力(li)學仿真(zhen)，將不同安裝(zhuang)距在(zai)不同轉速下(xia)分別(bie)進行仿真(zhen)分析，得到佳安裝(zhuang)距，并(bing)通過實驗驗證了(le)(le)在(zai)該(gai)安裝(zhuang)距下(xia)，主(zhu)減(jian)速器(qi)減(jian)振降噪得到很大的改善，而且軸(zhou)承(cheng)壽(shou)命(ming)也得到很大的提(ti)高，同時也為該(gai)車(che)主(zhu)減(jian)速器(qi)的結構設(she)計和(he)減(jian)振降噪提(ti)供方法(fa)指(zhi)導。......

[ 06-29 16:16 ]