滾針軸承的設(shè)計(jì)計(jì)算

NA系列滾針軸承的設(shè)計(jì)計(jì)算,,,,,,,,

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一、已知條件,,,,,,,,

軸承型號(hào),NA4822,軸承外徑(D),140,軸承內(nèi)徑(d),110,軸承游隙(Gr)min,,0.050

滾針內(nèi)徑(Fw),120,軸承寬度(B),30,裝配倒角rsmin,1.1,軸承游隙(Gr)max,,0.090

二、分步設(shè)計(jì)計(jì)算,,,,,,,,

1.主參數(shù)優(yōu)化,,,,,,,,

1.1滾針直徑的選擇：KDmin（D-Fw）≤Dw≤KDmax（D-Fw）,,,,,,,,

,KDmin為：,0.25,KDmax為：,0.36,Dwmin為：,5,Dwmax為：,7.2

根據(jù)標(biāo)準(zhǔn)滾針的尺寸和本軸承用滾針的約束條件選擇滾針為：,,,,,Dw：,6,Dwp為：,126

1.2滾針長(zhǎng)度的確定：B-KLmax*Dw≤Lw≤B-KLmin*Dw,,,,,,,,

,KLmin為：,0.8,KLmax為：,2.1,Dwmin為：,17.4,Dwmax為：,25.2

根據(jù)標(biāo)準(zhǔn)滾針的尺寸和本軸承用滾針的約束條件選擇滾針為：,,,,,Lw:,21.8,Lwe為：,19.6

1.3滾針個(gè)數(shù)的確定：π*Dwp/(K2max*Dw)≤Z≤π*Dwp/(K2min*Dw),,,,,,,,

,K2min為：,1.55,K2max為：,1.9,Dwmin為：,34.72286617,Dwmax為：,42.56351337

根據(jù)設(shè)計(jì)經(jīng)驗(yàn)、以往范列和軸承用鋼球的特性確定鋼球個(gè)數(shù)為：,,,,,Z：,,42,

1.4軸承徑向額定動(dòng)載荷的：Cr=bm*fc*(Lwe)7/9*Z3/4*Dwe29/27；,,,,,,,,

材料和加工質(zhì)量修正系數(shù)bm:,,,1.1,幾何形狀、制造精度和材料系數(shù)fc:,,,73.42,

,將各項(xiàng)參數(shù)值代入動(dòng)載荷的計(jì)算公式得：,,,Cr：(kN),92.37,,,

1.5軸承徑向額定靜載荷的：Cor=44*(1-Dwe/Dwp)*Z*Lwe*Dwe,,,,,,,,

,將各項(xiàng)參數(shù)值代入靜載荷的計(jì)算公式得：,,,Cor：(kN),206.98,,,

1.6圓弧修正線母線修型滾針的設(shè)計(jì),,,,,,,,

,測(cè)量點(diǎn)t1:t1=rmin,,0.4,,Qmax:Qmax=Cr/Z,,,2.20

,t:t=0.15(Lw-2t1),,3.2,δ:δ=3.85*10-5Qmax0.9/(Lw-2t1)0.8,,,,0.003

,Rc:Rc=((Lw-2r)2-(Lw-2*t1-2*t)2)/8/δ,,,,8442.436176,,,

2.套圈設(shè)計(jì),,,,,,,,

2.1內(nèi)外圈滾道直徑di、De的確定：di=Fw；De=Fw+2*Dw,,,,,,,,

,內(nèi)溝直徑di:,,120,di允差：,-0.015/-0.030,,Fw允差：,+0.058/+0.036

,外溝直徑De:,,132,De允差：,+0.051/+0.023,,,

2.2外圈滾道寬度E的確定：E=Lc=Lw+ε,,,,E:,22,,E允差：,+0.010

2.3擋邊寬度C2：C2=0.5*(B-E),,,,C2:,4,,C2允差：,-0.1

2.4套圈擋邊直徑：D2=Dpw+KD2*Dw,,,,,,,,

,KD2的值為：,,0.35,外圈擋邊直徑D2：,128.1,D2允差：,,+0.010

2.5內(nèi)圈兩端錐面寬度a2:a2=C2-0.18*Dw,,,,a2:,2.9,,a2允差：,-0.1

2.6內(nèi)圈兩端錐面半錐角β=11°20′,,,,,,,,

2.7內(nèi)圈滾道寬度E1的確定：E1=B-2*a2,,,,E1:,24.2,,,

2.8內(nèi)圈錐面直徑d3:d3=di-0.4*a2,,,,d3:,119.6,,d3允差：,±0.1

2.9套圈潤(rùn)滑油孔、潤(rùn)滑油槽的確定：,,,,,,,,

,孔位置an:,15,an允差：,±0.1,孔直徑dy:,5,dy允差：,+0.30

,槽半徑R:,7,R允差：,+0.50,槽深h:,1,an允差：,±0.1

2.10越程槽尺寸,,,mmax:,1,m1max:,0.5,,

2.11裝配倒角r與非裝配倒角：,,,,,,,,

,由rsmin值為：,1.1,,,,,,

,rsmax,徑向：,2.5,裝配倒角r,徑向：,2,r3:,0.8

,,軸向：,4,,軸向：,2,r8:,0.5

2.6標(biāo)志中心圓直徑(Dk）的確定：Dk=((D-2*r徑向max)+(D2max+2*r3)/2,,,,,,,,

,D2max為：,128.11,代入?yún)?shù)Dk為：,,132.4,,,

2.7標(biāo)志面有效寬度(hw）的確定：hw=((D-2*r徑向max)-(D2max+2*r3))/2,,,,,,,,

,,,代入?yún)?shù)hw為：,,2.6,,,

2.8標(biāo)志字體高h(yuǎn)z查表9為：,,,,1.5,,,,

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3.M型保持架設(shè)計(jì),,,,,,,,

3.1保持架中心圓直徑Dcp:Dcp=Dpw,,,,Dcp:,126,,Dcp允差：,±0.025

3.2保持架鋼板厚度Sc:Sc=0.25*Dw,,,,Sc:,1.5,,Sc允差：,±0.05

3.3保持架外徑Dc:Dc=Dcp+Sc,,,,Dc:,127.5,,Dc允差：,-0.250

3.4保持架內(nèi)徑Dc1:Dc1=Dcp-0.75*Dw,,,,Dc1:,121.5,,Dc允差：,+0.250

3.5保持架寬度Bc:Bc=Lw+(0.6～1.8)*Dw,,,,Bc:,29,,Bc允差：,-0.2/-0.55

3.6保持架窗孔圓周寬度bc:bc=Dw+0.1,,,,bc:,6.1,,bc允差：,+0.05

3.7保持架窗孔長(zhǎng)度Lc:Lc=Lw+0.1,,,,Lc:,21.9,,Lc允差：,+0.01

3.8窗孔端部至保持架斷面寬度Sb:Sb=0.5(Bc-Lc),,,,Sb：,3.55,,Sb允差：,-0.1

3.9斜梁夾角2β統(tǒng)一取為80°,,,,,,,,

3.10內(nèi)橫梁窗孔寬度bc2:bc2=(Dc1+2Sc)*sincos-1(((Dc1+2Sc)2+Dcp2-Dw2)/(2*Dcp*(Dc1+2Sc)))+0.05,,,,,,,,

,,代入?yún)?shù)bc2:,,5.82,,,bc2允差：,+0.05

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