基于动力学规律的农用发动机传输系统研究  

Research on Agricultural Engine Transmission System Based on Dynamics Law

作　　者：黄慧荣 Huang Huirong(Wuhan City Vocational College,Wuhan 430064,China)

机构地区：[1]武汉城市职业学院,武汉430064

出　　处：《农机化研究》2023年第6期260-263,共4页Journal of Agricultural Mechanization Research

基　　金：湖北省高等学校教学研究项目(2017590)。

摘　　要：以农业用发动机为研究对象,通过对其动力传输系统进行分析,基于多体动力学运动规律建立发动机动力传输系统中曲轴、活塞、连杆、销轴相关结构件的动力学模型,并通过仿真分析获取动力传输机构工作过程中的动态特性,并对发动机进气阀的位移特性进行分析。结果表明:在发动机运转过程中,曲柄所受载荷能够有效地限制发动机转速,使其处于相对稳定的状态;同时,在发动机转速波动范围内,活塞、连杆、销轴及曲柄所受载荷发生周期性变化且承受较大的冲击。为保证发动机能够充分地进行能量转化,进气阀应在较短的时间内快速打开和关闭,以提高发动机的动力特性。This paper takes the agricultural machinery engine as the research object,through the analysis of the agricultural engine power transmission system,based on the multi-body dynamic motion law,establishes the dynamic model of the crankshaft,piston,connecting rod,pin related structural parts in the engine power transmission system,obtains the dynamic characteristics of the power transmission mechanism in the working process through the simulation analysis,and carries on the research of the engine The displacement characteristics of the valve are analyzed.The results of dynamic simulation analysis show that the load on the crank can effectively limit the engine speed and make it in a relatively stable state in the process of engine operation.At the same time,the load on the piston,connecting rod,pin and crank changes periodically within the fluctuation range of engine speed,and bears a large impact,which indicates that the power transmission system is stable when the engine is running.In order to ensure that the engine can fully carry out the ability conversion,the intake valve can be opened and closed quickly in a short time to improve the dynamic characteristics of the engine.

关 键 词：农用发动机 动力传输系统 动力学 动态特性 

分 类 号：S219.03.1[农业科学—农业机械化工程]