UGNX四缸发动机曲轴连杆及活塞总成三维设计+CAD图纸
毕业论文关键词：曲轴；连杆；活塞；三文运动仿真
Four-cylinder engines crankshaft、connecting rod and piston assembly three dimensional design
Abstract: This paper introduces the major design index of motor, carried out the engine selection, and explains the basic principle of four-stroke gasoline engines. Targeted on 2.0L four-cylinder inline engine and made design calculation, determined the diameter of the cylinder is 80mm, analysis of force on the crank case, calculated the piston displacement and velocity. Select the piston materials in piston design and select full floating piston pin and do strength and rigidity check. Select the structure and materials in connecting rod linkage design, determine the length of the connecting rod, complete structural design of small end and big end of the connecting rod. Analysis the working conditions when doing the crankshaft design, decided fully supported monolithic crankshafts for select designs, Select nodular cast iron for crankshaft material. Calculated crankshaft main dimensions, designed crank and balance weights. Discusses three dimensional dynamic simulation operational processes based on UGNX software, emulated a drawing model, check the piston speed is small than 14m/s, which is comply with the design requirements.
KeyWords: crankshaft；connecting rod；piston；three dimensional dynamic simulation
目录
1 绪论 4
1.1课题研究的意义 4
1.2 汽车工业发展与现状 4
1.3我国与国外曲轴加工技术的差距 5
1.4 我国在汽车用曲轴工业方面的进展情况 5
2 发动机总体构造 6
2.1 发动机的主要设计指标 6
2.1.1 动力性指标 6
2.1.2 经济性指标 7
2.1.3 可靠性、耐久性指标 7
2.1.4 质量、外形尺寸指标 8
2.1.5 低公害指标 8
2.1.6 制造、使用、文护指标 8
2.2 发动机的总体构造介绍 9
2.2.1 曲柄连杆机构的功用、组成和工作原理 9
2.2.2发动机其他组成部分 10
2.3 发动机的选型 11
2.3.1 柴油机、汽油机或气体燃料发动机 12
2.3.2 冲程数 12
2.3.3 水冷、风冷 13
2.3.4 气缸的布置 13
2.4发动机的作用和基本术语 14
2.5 四冲程汽油机基本工作原理 16
3 汽油机结构参数的选取 18
3.1 气缸直径的确定 18
4 曲轴连杆机构的受力分析 20
4.1曲轴连杆机构运动学 20
4.1.1 活塞的位移 20
4.1.2 活塞的速度以及活塞的加速度 21
4.2 曲轴连杆机构中的作用力分析 21