鏈輪設(shè)計(jì)-實(shí)例
第一級(jí)傳動(dòng)主傳動(dòng)及二級(jí)傳動(dòng)鏈第二級(jí)傳動(dòng)一、鏈輪Z1的設(shè)計(jì)計(jì)算:1) 材料選擇:采用45#調(diào)質(zhì)處理表面硬度40-50HRC2) 分度圓直徑:d=p/(sina180/z)=19.05/(sina180/25)=151.995(mm)3) 齒頂圓直徑:dadamax=d+1.25p-d1=151.995+1.2519.05-11.91=163.8975(mm) (查表:d1=11.91)damin=d+(1-1.6/z1)p-d1=151.995+(1-1.6/25) 19.05-11.91=157.9158(mm)取da=1600-0.03(mm)4) 齒根圓直徑df:df=d-d1=151.995-11.91=140.085(mm)5) 分度圓弦齒高:hahamax=(0.625+0.8/z1)p-0.5d1=(0.625+0.8/25)19.05-0.511.91=6.561(mm)hamin=0.5(p- d1)=0.5(19.05-11.91)=3.570(mm)取ha=4.5(mm)6) 最大齒根距離:LxLx=dcos(90/z1)-d1=151.995cos(90/25)-11.91=139.785(mm)7) 齒側(cè)凸緣直徑:dg (查表:h為鏈的內(nèi)連扳高度;h=18.08)dg=pcot(180/z1)-1.04h-0.76=19.05cot(180/25)-1.0418.08-0.76=131.233(mm);取dg =131mm8) 齒側(cè)圓弧半徑:reremax=0.008d1(180+z12)=0.00811.91(180+252)=76.7004(mm)remin=0.12d1(2+z1)=0.1211.91(2+25)=38.5884(mm)9) 滾子定位圓弧半徑:ririmax=0.505d1+0.069 =0.50511.91+0.069311.91=6.172(mm)rimin=0.505d1=0.50511.91=6.015(mm)10) 滾子定位角:max=140-90/z1=140-90/25=136.4min=120-90/z1=120-90/25=116.411) 齒寬:bf1 (b1內(nèi)鏈節(jié)內(nèi)寬)bf1=0.95b1=0.9512.57=11.9415(mm)12) 齒側(cè)倒角:baba=0.13p=0.1319.05=2.4765(mm)13) 齒側(cè)半徑:rxrx=p=19.05(mm)14) 齒全寬:bfm (m排數(shù))bfm=(m-1)pt+ bf1=(1-1)pt+11.9415=11.9415(mm)15) 軸轂厚度:h(假設(shè)軸孔為50mm,<152mm范圍內(nèi)取值)h=K+dk/6+0.01d=9.5+ dk/6+0.01151.995=19.353(mm)16) 輪轂長(zhǎng)度:llmax=3.3h=3.319.353=63.866(mm)lmin=2.6h=2.619.353=50.319(mm)17) 輪轂直徑:dhdh=dk+2h=50+219.353=88.706(mm)二、 Z1對(duì)應(yīng)軸的設(shè)計(jì)計(jì)算1) 材料選45#,Mp(空心軸)2) 按需用應(yīng)力計(jì)算軸的直徑:d (T=9550P/n=95500.24/30=76.4(Nm),M=考慮鏈傳動(dòng)在軸上產(chǎn)生的彎矩)=2.6481.3=3.5(mm) 查表得1.3。取軸頸直徑40mm,空心孔內(nèi)徑do=400.85=34(mm)3) 按彎扭矩合成強(qiáng)度計(jì)算軸徑:=47.4301.279=60.66(mm),顯然采用合成算法更準(zhǔn)確。4) 若采用實(shí)心軸則:=47.430 (mm),取d=50mm5) 根據(jù)以上計(jì)算結(jié)果采用空心軸,又軸上有鍵槽,則d=60.661.1=66.728,取值為d=70則 do=700.85=59.56) 對(duì)一反求鏈輪軸孔dk=70mm,則軸轂厚度h:h=K+dk/6+0.01d=9.5+70/6+0.01151.995=22.687(mm) 輪轂長(zhǎng)度l: lmax=3.3h=3.322.687=74.867(mm);lmin=2.6h=2.622.687=58.986(mm);取中間值l=65mm輪轂直徑dh: dh=dk+2h=70+222.687=115.347(mm)三、鏈輪Z2的設(shè)計(jì)計(jì)算:1) 材料選擇:采用45#調(diào)質(zhì)處理表面硬度40-50HRC2) 分度圓直徑:d=p/(sina180/z)=19.05/(sina180/62)=376.117(mm)3) 齒頂圓直徑:dadamax=d+1.25p-d1=376.117+1.2519.05-11.91=388.020(mm) (查表:d1=11.91)damin=d+(1-1.6/z2)p-d1=376.117+(1-1.6/62)19.05-11.91=382.765(mm)取da=385(mm)公差h114) 齒根圓直徑df:df=d-d1=388.020-11.91=376.110(mm)5) 分度圓弦齒高:hahamax=(0.625+0.8/z2)p-0.5d1=(0.625+0.8/62)19.05-0.511.91=6.197(mm)hamin=0.5(p- d1)=0.5(19.05-11.91)=3.570(mm)取ha=5(mm)6) 最大齒根距離:LxLx=dcos(90/z2)-d1=388.020cos(90/62)-11.91=375.985(mm)7) 齒側(cè)凸緣直徑:dg (查表:h為鏈的內(nèi)連扳高度;h=18.08)dg=pcot(180/z2)-1.04h-0.76=19.05cot(180/62)-1.0418.08-0.76=356.071(mm)8) 齒側(cè)圓弧半徑:reremax=0.008d1(180+z22)=0.00811.91(180+622)=383.407(mm)remin=0.12d1(2+z2)=0.1211.91(2+62)=91.469(mm)9) 滾子定位圓弧半徑:ririmax=0.505d1+0.069 =0.50511.91+0.069311.91=6.172(mm)rimin=0.505d1=0.50511.91=6.015(mm)10) 滾子定位角:max=140-90/z2=140-90/62=138.548min=120-90/z2=120-90/25=118.54811) 齒寬:bf1 (b1內(nèi)鏈節(jié)內(nèi)寬)bf1=0.95b1=0.9512.57=11.9415(mm)12) 齒側(cè)倒角:baba=0.13p=0.1319.05=2.4765(mm)13) 齒側(cè)半徑:rxrx=p=19.05(mm)14) 齒全寬:bfm (m排數(shù))bfm=(m-1)pt+ bf1=(1-1)pt+11.9415=11.9415(mm)15) 軸轂厚度:h(假設(shè)軸孔為50mm,<152mm范圍內(nèi)取值)h=K+dk/6+0.01d=9.5+ dk/6+0.01388.020=19.353(mm)16) 輪轂長(zhǎng)度:llmax=3.3h=3.319.353=63.866(mm)lmin=2.6h=2.619.353=50.319(mm)17) 輪轂直徑:dhdh=dk+2h=50+219.353=88.706(mm)四、 Z2對(duì)應(yīng)軸的設(shè)計(jì)計(jì)算7) 材料選45#,Mp(空心軸)8) 按需用應(yīng)力計(jì)算軸的直徑:d (T=9550P/n=95500.24/30=76.4(Nm),M=考慮鏈傳動(dòng)在軸上產(chǎn)生的彎矩)=2.6481.3=3.5(mm) 查表得1.3。取軸頸直徑40mm,空心孔內(nèi)徑do=400.85=34(mm)9) 按彎扭矩合成強(qiáng)度計(jì)算軸徑:=47.4301.279=60.66(mm),顯然采用合成算法更準(zhǔn)確。10) 若采用實(shí)心軸則:=47.430 (mm),取d=50mm11) 根據(jù)以上計(jì)算結(jié)果采用空心軸,又軸上有鍵槽,則d=60.661.1=66.728,取值為d=70則 do=700.85=59.512) 對(duì)一反求鏈輪軸孔dk=70mm,則軸轂厚度h:h=K+dk/6+0.01d=9.5+70/6+0.01388.020=22.687(mm) 輪轂長(zhǎng)度l: lmax=3.3h=3.322.687=74.867(mm);lmin=2.6h=2.622.687=58.986(mm);取中間值l=65mm輪轂直徑dh: dh=dk+2h=70+222.687=115.347(mm)