上帝充通大￥ Shanghai Jiao Tong University Basic Belt Drives2 Slack side D vo=Belt speed Tight side Note:D1.D2 are B2 pitch diameters Groove Belt angle ride-out d101/2=d202/2 Typical belt section 01/o2=d2/d speed ratio and groove geometry Pitch Groove diameter depth power=C so T1@1=T2 @2 Sheave outside diameter 01/02=T2/T1 Figure 13-4 Cross Section of V-belt and Sheave Groove d=Pitch diameter,diameter belt appears to ride without slipping Note:slip and creep present,so not exactly equal to ratio 55 Basic Belt Drives2 d1 ω1 /2 = d2 ω 2 /2 ω1 / ω 2 = d2 / d1 = speed ratio power = C so T1 ω1 =T2 ω 2 ω1 / ω 2 = T2 / T1 d =Pitch diameter, diameter belt appears to ride without slipping Note: slip and creep present, so not exactly equal to ratio