升降臺NMRV090蝸輪蝸桿減速機自鎖失效原因分析

文(wen)章出(chu)處：admin 人氣：發表時間(jian)：2019-09-19 17:05

升(sheng)(sheng)降(jiang)(jiang)臺(tai)(tai)NMRV090蝸(gua)(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)(gua)桿(gan)減速(su)(su)(su)機(ji)(ji)自鎖失效原因(yin)分析。蝸(gua)(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)(gua)桿(gan)傳(chuan)動(dong)(dong)(dong)(dong)(dong)是(shi)機(ji)(ji)械(xie)傳(chuan)動(dong)(dong)(dong)(dong)(dong)中不可(ke)缺(que)少的(de)(de)(de)傳(chuan)動(dong)(dong)(dong)(dong)(dong)布(bu)置形式。在(zai)升(sheng)(sheng)降(jiang)(jiang)臺(tai)(tai)的(de)(de)(de)升(sheng)(sheng)降(jiang)(jiang)傳(chuan)動(dong)(dong)(dong)(dong)(dong)中使用(yong)蝸(gua)(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)(gua)桿(gan)減速(su)(su)(su)機(ji)(ji)可(ke)以(yi)防止臺(tai)(tai)面(mian)的(de)(de)(de)自動(dong)(dong)(dong)(dong)(dong)回(hui)落。由于(yu)蝸(gua)(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)(gua)桿(gan)傳(chuan)動(dong)(dong)(dong)(dong)(dong)安(an)裝(zhuang)誤(wu)差的(de)(de)(de)影響．其自鎖性(xing)能(neng)往往失效。以(yi)RV減速(su)(su)(su)機(ji)(ji)驅動(dong)(dong)(dong)(dong)(dong)的(de)(de)(de)升(sheng)(sheng)降(jiang)(jiang)臺(tai)(tai)為(wei)(wei)例，旦自鎖失效，就會導致(zhi)臺(tai)(tai)面(mian)的(de)(de)(de)自動(dong)(dong)(dong)(dong)(dong)回(hui)落，影響整(zheng)個(ge)生產(chan)線的(de)(de)(de)運(yun)轉(zhuan)(zhuan)，還有(you)可(ke)能(neng)出現(xian)較為(wei)(wei)嚴(yan)重的(de)(de)(de)安(an)全事故。蝸(gua)(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)(gua)桿(gan)傳(chuan)動(dong)(dong)(dong)(dong)(dong)升(sheng)(sheng)降(jiang)(jiang)臺(tai)(tai)主要由升(sheng)(sheng)降(jiang)(jiang)臺(tai)(tai)面(mian)、臺(tai)(tai)面(mian)旋轉(zhuan)(zhuan)支撐座(zuo)、舉升(sheng)(sheng)連(lian)(lian)(lian)桿(gan)、蝸(gua)(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)(gua)桿(gan)減速(su)(su)(su)機(ji)(ji)、聯軸(zhou)器、曲(qu)柄和(he)電(dian)機(ji)(ji)等組(zu)成。舉升(sheng)(sheng)連(lian)(lian)(lian)桿(gan)、曲(qu)柄、臺(tai)(tai)面(mian)旋轉(zhuan)(zhuan)支撐座(zuo)均(jun)為(wei)(wei)對稱布(bu)置。其基本(ben)工作過程是(shi)通過電(dian)控控制電(dian)機(ji)(ji)旋轉(zhuan)(zhuan)，帶動(dong)(dong)(dong)(dong)(dong)RV減速(su)(su)(su)機(ji)(ji)運(yun)轉(zhuan)(zhuan)．安(an)裝(zhuang)在(zai)蝸(gua)(gua)(gua)輪(lun)(lun)(lun)軸(zhou)兩端的(de)(de)(de)曲(qu)柄做圓周運(yun)動(dong)(dong)(dong)(dong)(dong)，從而帶動(dong)(dong)(dong)(dong)(dong)舉升(sheng)(sheng)連(lian)(lian)(lian)桿(gan)做上(shang)下運(yun)動(dong)(dong)(dong)(dong)(dong)．通過舉升(sheng)(sheng)連(lian)(lian)(lian)桿(gan)的(de)(de)(de)作用(yong)推動(dong)(dong)(dong)(dong)(dong)升(sheng)(sheng)降(jiang)(jiang)臺(tai)(tai)面(mian)圍繞臺(tai)(tai)面(mian)旋轉(zhuan)(zhuan)支撐座(zuo)做上(shang)下擺動(dong)(dong)(dong)(dong)(dong)，實現(xian)臺(tai)(tai)面(mian)的(de)(de)(de)舉升(sheng)(sheng)和(he)下降(jiang)(jiang)。這種結構廣泛應用(yong)于(yu)鋼(gang)鐵廠(chang)軋鋼(gang)生產(chan)線的(de)(de)(de)三輥初扎機(ji)(ji)上(shang)。

鵠興蝸輪蝸桿減速機NMRV，升降臺NMRV090蝸輪蝸桿減速機自鎖失效原因分析
NMRV75.NMRV90.NMRV110減速機安裝尺寸

蝸(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)桿(gan)(gan)(gan)中心安裝誤差所致(zhi)的(de)(de)(de)自(zi)鎖(suo)失效(xiao)分(fen)析(xi)：當蝸(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)桿(gan)(gan)(gan)減(jian)速箱推動舉升(sheng)連桿(gan)(gan)(gan)運動到高位置時(shi)，電機(ji)(ji)停轉(zhuan)，蝸(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)桿(gan)(gan)(gan)不(bu)能自(zi)鎖(suo)，升(sheng)降(jiang)臺(tai)面(mian)緩慢下降(jiang)。假(jia)設升(sheng)降(jiang)平臺(tai)給升(sheng)降(jiang)連桿(gan)(gan)(gan)的(de)(de)(de)力(li)(li)(li)(li)為(wei)Fc，曲柄長度為(wei)R，外力(li)(li)(li)(li)施加給蝸(gua)(gua)輪(lun)(lun)(lun)轉(zhuan)矩。根(gen)據升(sheng)降(jiang)臺(tai)的(de)(de)(de)尺(chi)寸和舉升(sheng)重物分(fen)析(xi)，當曲柄角度處于的(de)(de)(de)第1象限或者第Ⅱ象限的(de)(de)(de)某(mou)角度時(shi)，轉(zhuan)矩有大值。蝸(gua)(gua)輪(lun)(lun)(lun)蝸(gua)(gua)桿(gan)(gan)(gan)自(zi)身受力(li)(li)(li)(li)分(fen)析(xi)：法(fa)向(xiang)(xiang)力(li)(li)(li)(li)為(wei)蝸(gua)(gua)輪(lun)(lun)(lun)面(mian)反作(zuo)用在(zai)蝸(gua)(gua)桿(gan)(gan)(gan)嚙合點的(de)(de)(de)作(zuo)用力(li)(li)(li)(li)，該法(fa)向(xiang)(xiang)力(li)(li)(li)(li)垂(chui)直指向(xiang)(xiang)此處齒廓(kuo)。為(wei)分(fen)析(xi)方便．將其(qi)分(fen)解成(cheng)3個(ge)相互垂(chui)直的(de)(de)(de)分(fen)力(li)(li)(li)(li)。因NMRV090減(jian)速機(ji)(ji)蝸(gua)(gua)桿(gan)(gan)(gan)軸線與蝸(gua)(gua)輪(lun)(lun)(lun)軸線成(cheng)空間90o布(bu)置．即作(zuo)用在(zai)蝸(gua)(gua)桿(gan)(gan)(gan)上(shang)的(de)(de)(de)圓周力(li)(li)(li)(li)與蝸(gua)(gua)輪(lun)(lun)(lun)上(shang)的(de)(de)(de)軸向(xiang)(xiang)力(li)(li)(li)(li)相等．蝸(gua)(gua)桿(gan)(gan)(gan)上(shang)的(de)(de)(de)軸向(xiang)(xiang)力(li)(li)(li)(li)與蝸(gua)(gua)輪(lun)(lun)(lun)上(shang)的(de)(de)(de)圓周力(li)(li)(li)(li)相等。蝸(gua)(gua)桿(gan)(gan)(gan)上(shang)的(de)(de)(de)徑(jing)(jing)向(xiang)(xiang)力(li)(li)(li)(li)與蝸(gua)(gua)輪(lun)(lun)(lun)上(shang)的(de)(de)(de)徑(jing)(jing)向(xiang)(xiang)力(li)(li)(li)(li)相等．以上(shang)各組(zu)力(li)(li)(li)(li)的(de)(de)(de)方向(xiang)(xiang)均相反。

安裝位(wei)置偏(pian)(pian)(pian)移對受力的(de)(de)影響(xiang)分析：RV減(jian)速機蝸(gua)(gua)(gua)輪(lun)蝸(gua)(gua)(gua)桿(gan)中間(jian)平(ping)(ping)面(mian)(mian)(mian)(mian)安裝有三(san)種位(wei)置。蝸(gua)(gua)(gua)桿(gan)中間(jian)平(ping)(ping)面(mian)(mian)(mian)(mian)與(yu)蝸(gua)(gua)(gua)輪(lun)中間(jian)平(ping)(ping)面(mian)(mian)(mian)(mian)重(zhong)合或者在(zai)(zai)允許誤差范(fan)圍內，蝸(gua)(gua)(gua)桿(gan)中間(jian)平(ping)(ping)面(mian)(mian)(mian)(mian)與(yu)蝸(gua)(gua)(gua)輪(lun)中間(jian)平(ping)(ping)面(mian)(mian)(mian)(mian)存在(zai)(zai)安裝偏(pian)(pian)(pian)差而且偏(pian)(pian)(pian)差超過允許范(fan)圍，或者偏(pian)(pian)(pian)向(xiang)(xiang)左(zuo)(zuo)側，或者偏(pian)(pian)(pian)向(xiang)(xiang)右(you)(you)側。以右(you)(you)旋(xuan)蝸(gua)(gua)(gua)桿(gan)傳(chuan)動(dong)為(wei)例，若蝸(gua)(gua)(gua)輪(lun)蝸(gua)(gua)(gua)桿(gan)減(jian)速機中蝸(gua)(gua)(gua)桿(gan)是逆時(shi)針方向(xiang)(xiang)旋(xuan)轉(zhuan)(zhuan)，則蝸(gua)(gua)(gua)輪(lun)的(de)(de)旋(xuan)向(xiang)(xiang)為(wei)自(zi)外(wai)向(xiang)(xiang)里(li)旋(xuan)轉(zhuan)(zhuan)，此時(shi)蝸(gua)(gua)(gua)輪(lun)的(de)(de)接觸斑(ban)點偏(pian)(pian)(pian)左(zuo)(zuo)，蝸(gua)(gua)(gua)輪(lun)齒(chi)(chi)面(mian)(mian)(mian)(mian)的(de)(de)磨(mo)損(sun)左(zuo)(zuo)側比右(you)(you)側嚴(yan)重(zhong)，對于(yu)(yu)升(sheng)(sheng)降(jiang)臺(tai)這樣(yang)的(de)(de)重(zhong)型載荷，這種現象會更為(wei)明(ming)顯，磨(mo)損(sun)越來越嚴(yan)重(zhong)，經過嚴(yan)重(zhong)磨(mo)損(sun)后，RV伺服減(jian)速機中蝸(gua)(gua)(gua)輪(lun)的(de)(de)螺(luo)旋(xuan)角由初期的(de)(de)逐漸增大。這種偏(pian)(pian)(pian)置安裝同樣(yang)導(dao)致(zhi)了蝸(gua)(gua)(gua)桿(gan)的(de)(de)磨(mo)損(sun)和加(jia)重(zhong)了金(jin)屬膠合現象的(de)(de)發生，即導(dao)程角增大了。當(dang)(dang)曲柄驅動(dong)舉升(sheng)(sheng)連桿(gan)使(shi)得升(sheng)(sheng)降(jiang)臺(tai)面(mian)(mian)(mian)(mian)至于(yu)(yu)高(gao)點位(wei)置時(shi)，假(jia)設(she)此時(shi)電機停(ting)轉(zhuan)(zhuan)，由于(yu)(yu)升(sheng)(sheng)降(jiang)臺(tai)面(mian)(mian)(mian)(mian)施加(jia)給蝸(gua)(gua)(gua)輪(lun)的(de)(de)轉(zhuan)(zhuan)矩的(de)(de)存在(zai)(zai)，RV減(jian)速機中的(de)(de)蝸(gua)(gua)(gua)輪(lun)成為(wei)主動(dong)輪(lun)，蝸(gua)(gua)(gua)桿(gan)成為(wei)被動(dong)輪(lun)，作用在(zai)(zai)蝸(gua)(gua)(gua)桿(gan)齒(chi)(chi)面(mian)(mian)(mian)(mian)的(de)(de)圓周力就(jiu)(jiu)會隨著(zhu)導(dao)程角度的(de)(de)增大而增大，當(dang)(dang)導(dao)程角度增加(jia)至超過當(dang)(dang)量摩擦角時(shi)．蝸(gua)(gua)(gua)輪(lun)蝸(gua)(gua)(gua)桿(gan)減(jian)速機就(jiu)(jiu)失(shi)去(qu)了自(zi)鎖(suo)功能，因此升(sheng)(sheng)降(jiang)臺(tai)不(bu)能停(ting)在(zai)(zai)高(gao)點位(wei)置，而自(zi)動(dong)回(hui)落。

結論：蝸(gua)(gua)(gua)輪(lun)蝸(gua)(gua)(gua)桿減(jian)速機廣泛應用于機械(xie)設(she)備中(zhong)．在很多場合都要求蝸(gua)(gua)(gua)輪(lun)蝸(gua)(gua)(gua)桿具(ju)有自(zi)鎖(suo)(suo)性．當蝸(gua)(gua)(gua)輪(lun)蝸(gua)(gua)(gua)桿的中(zhong)間(jian)平面安(an)裝位置存在偏差時，即傳動中(zhong)間(jian)平面極限偏差超出(chu)極限時，且(qie)導(dao)致導(dao)程角(jiao)度增加至超過當量摩擦角(jiao)時．就會(hui)失去自(zi)鎖(suo)(suo)功能。

鵠興蝸輪蝸桿減速(su)機(ji)NMRV，升降臺NMRV090蝸輪蝸桿減速(su)機(ji)自(zi)鎖失效原因分析(xi)

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