Cardan Shafts for Industrial Applications - Dana

Technical instructions for applicationGreater differences of about3° to 5° are acceptable withoutdisadvantages in low-speedapplications. For applicationswith varying deflection conditions,it is important to obtainuniformity, if possible over thecomplete deflection range.Deflection in two planes meansthat the deflection is both horizontaland vertical. The combinationof two identical typesof deflection (Z/Z or W/W) andidentical deflection angles ensureuniformity. For a combination ofZ- and W-deflection, the inneryokes must be offset. Pleaseconsult with Dana applicationengineers to determine the properamount of angular offset.Determination of the maximumpermissible operating deflectionangleDepending on the cardan shaftseries, the maximum deflectionangle per joint is b = 5° to 44°.Due to the kinematic conditionsof the cardan joint, as describedbefore, the deflection angle mustbe limited in relation to the speed.Calculations and observations ofmany applications have shownthat certain mass accelerationtorques of the center part mustnot be exceeded in order toguarantee smooth running of thedrive systems. This accelerationtorque depends on theProduct of speed and deflectionangle D = n .and the moment of inertia of themiddle part of the shaft. Theparameter D is proportional tothe angular acceleration of thecardan shaft center part ε 2 .ε2 ~ D = n . bn = Operating speed [rpm]b = Deflection angle of joint [