電腦控制拉力試驗機/電腦拉力機系統傳動比原理

系統傳動比(bi)原(yuan)理：

機構中瞬(shun)時輸入速度與輸出速度的比值稱為機構的傳動比.

　　機構(gou)(gou)中兩(liang)轉(zhuan)動(dong)(dong)(dong)(dong)構(gou)(gou)件(jian)(jian)(jian)(jian)(jian)角(jiao)(jiao)速(su)度(du)的(de)(de)(de)(de)(de)(de)比(bi)(bi)(bi)值，也稱速(su)比(bi)(bi)(bi)。構(gou)(gou)件(jian)(jian)(jian)(jian)(jian)a和(he)(he)(he)(he)構(gou)(gou)件(jian)(jian)(jian)(jian)(jian)b的(de)(de)(de)(de)(de)(de)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)為(wei)(wei)Ⅰ=ωa/ ωb=na/nb，式中ωa和(he)(he)(he)(he)ωb分別為(wei)(wei)構(gou)(gou)件(jian)(jian)(jian)(jian)(jian)a和(he)(he)(he)(he)b的(de)(de)(de)(de)(de)(de)角(jiao)(jiao)速(su)度(du)（弧度(du)/秒）；na和(he)(he)(he)(he)nb分別為(wei)(wei)構(gou)(gou)件(jian)(jian)(jian)(jian)(jian)a和(he)(he)(he)(he)b的(de)(de)(de)(de)(de)(de)轉(zhuan)速(su)（轉(zhuan)/分）（注：ω和(he)(he)(he)(he)n后的(de)(de)(de)(de)(de)(de)a和(he)(he)(he)(he)b為(wei)(wei)下腳標）。當式中的(de)(de)(de)(de)(de)(de)角(jiao)(jiao)速(su)度(du)為(wei)(wei)瞬時(shi)(shi)值時(shi)(shi)，則求(qiu)得(de)的(de)(de)(de)(de)(de)(de)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)為(wei)(wei)瞬時(shi)(shi)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)。當式中的(de)(de)(de)(de)(de)(de)角(jiao)(jiao)速(su)度(du)為(wei)(wei)平均(jun)值時(shi)(shi)，則求(qiu)得(de)的(de)(de)(de)(de)(de)(de)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)為(wei)(wei)平均(jun)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)。對于大多數齒廓正確的(de)(de)(de)(de)(de)(de)此輪(lun)(lun)(lun)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)和(he)(he)(he)(he)摩擦(ca)(ca)輪(lun)(lun)(lun)傳(chuan)(chuan)動(dong)(dong)(dong)(dong),瞬時(shi)(shi)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)是不(bu)變的(de)(de)(de)(de)(de)(de)對于鏈傳(chuan)(chuan)動(dong)(dong)(dong)(dong)和(he)(he)(he)(he)非圓齒輪(lun)(lun)(lun)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)，瞬時(shi)(shi)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)是變化的(de)(de)(de)(de)(de)(de)。對于嚙(nie)合傳(chuan)(chuan)動(dong)(dong)(dong)(dong)，傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)可(ke)用a和(he)(he)(he)(he)b輪(lun)(lun)(lun)的(de)(de)(de)(de)(de)(de)齒數Za和(he)(he)(he)(he)Zb表(biao)(biao)示，i=Zb/Za；對于摩擦(ca)(ca)傳(chuan)(chuan)動(dong)(dong)(dong)(dong),傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)可(ke)用a和(he)(he)(he)(he)b輪(lun)(lun)(lun)的(de)(de)(de)(de)(de)(de)直徑和(he)(he)(he)(he)b表(biao)(biao)示，i=b/a。這時(shi)(shi)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)一(yi)(yi)般是表(biao)(biao)示平均(jun)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)。在液力傳(chuan)(chuan)動(dong)(dong)(dong)(dong)中，液力傳(chuan)(chuan)動(dong)(dong)(dong)(dong)元件(jian)(jian)(jian)(jian)(jian)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)一(yi)(yi)般指的(de)(de)(de)(de)(de)(de)是渦輪(lun)(lun)(lun)轉(zhuan)速(su)和(he)(he)(he)(he)泵輪(lun)(lun)(lun)轉(zhuan)速(su)B的(de)(de)(de)(de)(de)(de)比(bi)(bi)(bi)值,即(ji)=/B。液力傳(chuan)(chuan)動(dong)(dong)(dong)(dong)元件(jian)(jian)(jian)(jian)(jian)也可(ke)與機械傳(chuan)(chuan)動(dong)(dong)(dong)(dong)元件(jian)(jian)(jian)(jian)(jian)（一(yi)(yi)般用各種(zhong)此輪(lun)(lun)(lun)輪(lun)(lun)(lun)系(xi)結合使用，以獲得(de)各種(zhong)不(bu)同數值的(de)(de)(de)(de)(de)(de)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)比(bi)(bi)(bi)

傳(chuan)動(dong)比(bi)計(ji)算法：

傳動比=使用(yong)扭矩÷9550÷電(dian)機功率×電(dian)機功率輸(shu)入轉數(shu)÷使用(yong)系(xi)數(shu)

　　傳動比=主動輪(lun)轉速與從動輪(lun)的比值(zhi)=它們分度圓直徑的反比。即：i=n1/n2=D2/D1

　　i=n1/n2=z2/z1（齒(chi)輪的）

　　單級(ji)與多級(ji)傳(chuan)動

　　單級(ji)傳(chuan)(chuan)動(dong)(dong)指的(de)是(shi)沒有(you)(you)變速(su)(su)的(de)，傳(chuan)(chuan)動(dong)(dong)比(bi)是(shi)恒定(ding)的(de)。 多(duo)級(ji)是(shi)傳(chuan)(chuan)動(dong)(dong)比(bi)可(ke)調的(de)，具有(you)(you)多(duo)級(ji)變速(su)(su)比(bi)得(de)傳(chuan)(chuan)動(dong)(dong)方(fang)式(shi)。　對于多(duo)級(ji)齒(chi)輪(lun)傳(chuan)(chuan)動(dong)(dong)1、每兩軸(zhou)(zhou)之間的(de)傳(chuan)(chuan)動(dong)(dong)比(bi)按(an)照上(shang)面的(de)公式(shi)計(ji)算(suan)2、從*軸(zhou)(zhou)到第n軸(zhou)(zhou)的(de)總(zong)傳(chuan)(chuan)動(dong)(dong)比(bi)按(an)照下(xia)面公式(shi)計(ji)算(suan): 總(zong)傳(chuan)(chuan)動(dong)(dong)比(bi)ι=（Z1/Z2）×（Z3/Z4）×（Z5/Z6）……=（n2/n1）×（n4/n3）×（n6/n5）…… 與(yu)齒(chi)輪(lun)半徑沒有(you)(you)關系