畢業(yè)設(shè)計(jì)三級(jí)圓柱圓錐齒輪減速器-文庫(kù)吧資料
2024-08-09 16:39本頁(yè)面
【正文】 估計(jì)*Ft/b100N/mm cos=u/=2/= cos=1/=1/= =/ cos=24/==/ cos=48/=αv=((1/(2*)+1/(2*)))cos=====齒向載荷分布函數(shù) =載荷系數(shù) ==1***=轉(zhuǎn)矩 =**=**彈性系數(shù) =節(jié)點(diǎn)區(qū)域系數(shù) =接觸疲勞強(qiáng)度 =710Mpa =680Mpa接觸最小安全系數(shù)=接觸壽命系數(shù) ==許用接觸應(yīng)力 []= */=710*/=676Mpa []= */=680*/=648Mpa小輪大端分度圓直徑 = =70mm驗(yàn)算圓周速度及Ka*Ft/b =() =()70= ==* = b=*R=*d/(2*sin)=*/(2*=*/b=*100N/mm確定傳動(dòng)尺寸大端模數(shù) m=/=70/24=實(shí)際大端分度圓直徑d =m=3*24=84 =m=3*48=144b=*R=*=齒根彎曲疲勞強(qiáng)度計(jì)算齒面系數(shù) = =應(yīng)力修正系數(shù) = =重合度系數(shù) =++齒間載荷分配系數(shù) */b100N/mm =1/=1/=載荷系數(shù) ==1***=彎曲疲勞極限 =600MPa =570MPa彎曲最小安全系數(shù) =彎曲壽命系數(shù) ==尺寸系數(shù) =許用彎曲應(yīng)力 []= lim/=600** []=570**驗(yàn)算 ===152[]==152**(*)=標(biāo)準(zhǔn)斜齒圓柱齒輪 小齒輪用40Cr調(diào)質(zhì)處理,硬度241HB~~286HB 平均260MPa 大齒輪用45號(hào)鋼,調(diào)質(zhì)處理,硬度229HB~~286HB 平均241MPa初步計(jì)算轉(zhuǎn)矩=**齒數(shù)系數(shù)=值 取=85初步計(jì)算的許用接觸應(yīng)力[H1]==*710=619MPa [H2]==*580=522MPa初步計(jì)算的小齒輪直徑 =Ad=85*=取 d1=50mm初步尺寬b=d*=1*50=50mm校核計(jì)算圓周速度 v==精度等級(jí) 選九級(jí)精度齒數(shù)z和模數(shù)m 初步齒數(shù)=19。數(shù)求帶根 v=**/(60*1000)=傳動(dòng)比 i=/=2帶根數(shù) = = = ΔP= z=/((+Δ)**)=((+)**)= 取9根求軸上載荷張緊力 =500*/v*z()/+qv*v=500*(*9)*()/+*=軸上載荷 =2*sin(/2)=2*9**sin(176。(297100)*60176。(D2
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