高地隙喷雾机双平行四杆喷雾支架平稳性结构分析

Design and Finite Element Analysis of Spray Boom

为了改善双平行四杆喷雾支架的平稳性,应用AIP软件建立了以双平行四杆机构为升降装置的喷雾支架三维模型,包括底盘连接件、摆动杆、喷杆连接件、连接杆、加强板和上升油缸6个部分。结果表明:初始双平行四连杆机构安全系数未能满足设计要求,因而对摆动杆、连接杆及加强板所用钢管或钢板的厚度进行了优化,优化后双四连杆机构总质量增加了2.4%,安全系数从0.8增加到了1.16,满足了设计要求;喷雾吊杆的1阶模态频率为12.49Hz,大于10Hz,满足田间作业激励一般不得小于10Hz的要求。在邯郸升华机械厂进行了样机试制,根据载荷与作业情况进行了性能试验,并进行了田间试验,从喷雾吊杆展开到施药喷雾的整个试验过程中,喷雾吊杆施药过程可靠稳定,结构设计合理,达到了设计要求。

In order to improve the stability of double parallel four-bar spray bracket using AIP software to set up a double parallel four-bar mechanism for elevating device of spray bracket model,including connection to the chassis,swinging rods,spray bar connector,connecting rods,reinforcing plate and rise six parts of the fuel tank. Results showed that initial safety coefficient of double parallel four-bar mechanism fails to meet the design requirements,swinging rods,connecting rods,reinforced plate steel or steel plate thickness optimized optimized double four-bar linkage mechanism increases the total mass of 2. 4%,the safety factor has increased from 0. 8 to 1. 16 meets the design requirements; spray boom of a modal frequency is 12. 49 Hz,larger than 10 Hz,meet the requirements of field excitation less than 10 Hz.Prototype in the sublimation machine factory of Handan,performance tests according to the load and operating conditions,and conducted a field experiment,from spray booms to pesticide spraying throughout the testing process,spray boom spraying process reliability and reasonable structure design,meets the design requirements.