Meshing Performanceanalysis Of Face-Gear Drive Based On Pinion Double Crowned Modification

Face-gear drive is a new-type gear drive with cylindrical gear andbevel gear wheel. It has many driving characteristics，such as compactstructure, high transmission ratio,large contact ratio, light weight, highreliability, easy installation and so on.With the wide application offace-gear in aeronautics and astronautics, higher requirements offace-gear drive are put forward. So double crowning on the pinion waspresented to lower vibration noise of face-gear drive and improve themeshing performance of face gear in this paper. The main contents are asfollows:1) Meshing experiments were conducted on the face-gear drive withthe pinion of no modification. The position of meshing contact area onface-gear tooth surface were inspected in the meshing process offace-gear and the pinion with no modification. Experiments aboutinfluences of the rotate speed of the pinion with no modification and loadof face gear on the vibration noise generated in the process of face-geardrive, were also conducted.2) The theory of gear modification was researched, and the methods ofdouble crowning modification and processing method of the pinion wereput forward. The surface equation of the double crowned pinion wasderived. Then, machining coordinate systems of face-gear were built, andthe surface equation of face gear was derived,too.3) The mathematical model of face-gear drive was built for contactanalysis. According to the theory of TCA method, influence of theparameters of the double crowned pinion on contact area withoutconsidering machining error and transmission error. Suitable parametercombination was chose, and the models of face-gear and the pinionbefore and after double crowning were built and assembled with the useof MATLAB and Pro/E.4) Simulations are conducted for meshing contact area in the process offace-gear drive. And meshing positions on the tooth surface of face gearbefore and after the modification of the pinion were compared and analyzed. The influence of double crowning of the pinion on the meshingcontact area of face-gear tooth surface was obtained, which made itknown that the purpose of modification was achieved.5) Kinetic simulations of face-gear drive were conducted with the useof ADAMS,which were mainly about comparative analysis of face-gearvelocity and acceleration before and after the modification of the pinion.Then,it was concluded that double crowning of the pinion was beneficialto lowering transmission noise and improving meshing performance offace-gear drive.