Geometric Characteristics Analysis of Cam Mechanism in Direct-Drive Piston Engine

被引：0
|
作者：
Yang Y. [1 ]
Tao S. [1 ]
Zhou G. [1 ]
Li J. [1 ]
机构：
[1] Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin
来源：
Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology | 2023年 / 56卷 / 09期
基金：
中国国家自然科学基金;
关键词：
cam engine; induced curvature; meshing angle; opposed pistons; sliding ratio;
D O I：
10.11784/tdxbz202205032
中图分类号：
学科分类号：
摘要：
The configuration of a small size，high energy efficiency，and high power density engine has always been the focal point of study in this field. The focus of this paper is an inverse cam mechanism driven directly by pistons. Based on the systematic analysis of the structure，operating principle，and operating condition features of the mechanism，the motion function form applicable to high-efficient energy conversion between pistons and cam mechanism was discussed. Based on the established motion law，the curved surface equation of the cylindrical cam and analytical equations for the induced curvature and the meshing angle between the cam surface and the piston rollers were established. Then，the principal factors affecting the geometric characteristics，force and motion transmission characteristics，and sliding ratio between the cam surface and rollers of the cam mechanism were analyzed，and the parametric design condition for preventing curvature interference between the cam surface and rollers was established. Finally，given arbitrary working condition parameters such as piston travel，feasible dimensional parameter examples for the inverse cam mechanism were designed，and the simulation model of the prototype was built in the Adams environment. The validity of the design method was verified by comparing the simulation results of the prototype with the theoretical curves of the designed motion law. The research provides an efficient method for designing the cam mechanism of direct-drive piston engines. © 2023 Tianjin University. All rights reserved.
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页码：953 / 960
页数：7
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