高地隙自走式喷雾机发动机悬置系统优化设计

Optimal Design of Engine Suspension System for High Clearance Self-propelled Sprayer

某经济型高地隙自走式喷雾机使用三缸发动机作为动力,但低速作业时整车振动剧烈,对喷雾性能产生了不利影响。针对这一问题,对悬置系统进行重新设计。低速运行时,激励主要来自绕曲轴轴线的转矩波动,故采用隔振器斜置式布置方案。根据振动理论,对隔振器安装位置和倾斜角度进行计算和优化。理论分析和试验结果表明:改进设计后,整车振动情况得到较大改善。

A three-cylinder engine is used for high clearance self-propelled sprayer for the reason of economy. Howev- er, violent vibration is observed when the sprayer works at a low velocity. It is necessary for the optimal design of the en- gine suspension system. The excitation is mainly fluctuation of torque around the crank axis of engine in this instance, so a scheme where the isolators are obliquely placed is adopted. The oblique angle and location of isolators are calculated and optimized according to vibration isolation theory. The results of test show that the vibration of sprayer has been re- duced largely.