WhatisthedifferencebetweenV-beltsandflatbelts
1、平带flat-beltIncomparisontoV-belts,flatbeltsrequiresignificantlyhigherpretensioninginordertotransmitacertaintorquewithoutslippage.Thisespeciallyappliestolargetransmissionratiosandtherebylowanglesofcontact.Tensionpulleyswithdefinedcontactpressurearerecommendedincasesofthiskindtoreducethetransverseforce
Flatbeltsarenotadvisableforhighoutputsathighspeeds.
与V形皮带相比，平带需要更高的预紧力才能在不打滑的情况下传输一定扭矩。这尤其适用于较大的传输比，从而降低接触角度。在此类情况下，建议使用具有定义接触压力的张力滑轮，以减少横向力对于高速下的高输出，不建议使用扁平皮带。
2、齿形带V-beltV-beltsarecharacterizedbytheirtrapeziumshaped(v-shaped)cross-section.Theyconsistofatensioningsectionofmultiplelayersofendlesslywoundpolyesterfibercordthreads,thecorewhichismadeofahigh-qualityrubbermixtureandtheenclosurewhichismadeofrubberizedcottonorsyntheticfabric.Dependingontheintendeduse,differentdesignsareused.
V形带的特点是其梯形（V形）横截面。它们包括多层无边缠绕聚酯纤维线线的张力部分，核心由高品质的橡胶混合物制成，外壳由橡胶棉或合成织物制成。根据预期用途，使用不同的设计。
V-beltdesigns:a)StandardV-belt,b)NarrowV-belt,c)NarrowV-belt–open-edged,toothed,d)WideV-belt(toothed),e)DoubleV-belt,f)JoinedV-belt,g)PolyV-belt
Toincreasetheflexibilityofthebelt,multipletoothedV-beltsareused,enablingsmallerdiameters.Whenloaded,theV-beltpullsitselfintothetrapeziumshapedgrooveofthepulleyandgeneratesthefrictioncontactrequiredfortorquetransmissionthroughtheV-effectonbothedges.TheV-beltitselfmaynottouchthebottomofthegroove.为了增加皮带的灵活性，使用了多个齿形V形皮带，从而实现更小的直径。加载时，V形皮带将自身拉入滑轮的梯形槽中，并通过两侧V效应产生扭矩传输所需的摩擦接触。V形皮带本身可能无法触及凹槽的底部。
Withfewexceptions,V-beltsaremanufacturedasendlessandsuppliedinstandardlengths.ShaftspacingcanthereforenotbefreelyselectedforthedesignoftheV-beltgearbox.Forinstallationreasons,certainconstructiveprecautionsarealsotobetaken.除了少数例外，V形皮带是无止境的，以标准长度提供。因此，在V带变速箱的设计中不能自由选择轴间距。出于安装原因，我们还要采取某些建设性的预防措施。