Modeling on Meshing Surface of the Spherical Cam Transmission Mechanism in a Twin-rotor Piston Engine

• Main Authors: Chen, Hu, Hou, Qingkai, Xu, Haijun, Zhang, Lei
• Format: Conference Proceeding
• Language: English
• Subjects: Conferences; Mechatronics
• ISSN: 2159-6255
• DOI: 10.1109/AIM43001.2020.9158937

Twin-rotor piston engine is proposed for dealing with energy and environmental issues, to pursue new developments on improving engine performances, what's more, the advantages of Twin-rotor piston engine are inherited, such as high power density and no valve mechanism. The Twin-rotor Piston Engine is driven by a novel cycloidal cam combination mechanism, whose key parts are the swing plate and a spherical cam with cycloidal profiles. To achieve a good performance of the Twin-rotor Piston Engine, the meshing profile of the spherical cam mechanism was studied in the paper. For a cam mechanism, the cam profile is very important to the meshing process. Based on the kinematics model of cam mechanism before and the enveloping surface theory, the parameter model of the cam profile was established, and then the simulation of this model was carried out. According to the calculations and simulation of the cam profile, the characteristics of meshing contact and machinability were analyzed. The main conclusions are: in the surface of the cam profile, the relative speeds of all the points on the contact line are the same, that is to say, the meshing contact between the cam and the roller is the pure rolling motion. The cam profile is consisted of countless lines from the center point, and there is only one tangent plane for all points of every single contact line on the cam profile, which means the machinability of the cam profile is good.