Sklyar U. Synthesis bases of cylindrical straight gearings with displacing of initial contour and their application for increasing of working capacity of conchoidal gearing

The mathematical model of cylindrical straight gearings with generalized geometry of teeth and displacing of initial contour were built for increasing of loading ability and improvement of working capacity. On this basis geounderground-kinematic and complex criteria of working capacity which depend on one unknown function and its derivatives at displacement of an initial contour are defined. The differential equations of the generalized kind for synthesis of geometry of an initial contour at its displacement were received. The initial contours were synthesized. They are outlined by arches of a circle for conchoidal tooth gearings that providе contact of convex teeths of hooked wheels, and also for transfers of the mixed gearing. The part of profiles of teeths provides involute gearing, and the other part provides conchoidal gearing.On the basis of a hypothesis of broken sections Verhovsky the value of criterion bending streingth for teeths with the generalized initial contour outlined by any curve was received. Tooth gearings with the raised wear resistance were synthesized.The comparative analysis of criteria of working capacity conchoidal and involute tooth gearings with displacement of an initial contour were carried out. The coefficient of displacement for a gear wheel is more zero (to 0,5), the coeffient for a wheel is less than zero (to-0,5) . It is established that criteria of working capacity improve on 15 … 20 % when the coefficient of displacement is increased. Criteria of working capacity of conchoidal teeth gearings are above in 1,1 … 2,54 times, than for involute gearings with similar parameters. Reliability of theoretical decisions is confirmed by results of an experimental research.