基于种绳模式胡萝卜播种机主体框架谐响应分析

doi:10.13733/j.jcam.issn.20955553.2022.05.001

摘要/Abstract

摘要： 为优化种绳模式胡萝卜播种机主体框架结构，保证作业质量，结合胡萝卜播种农艺要求及种绳模式的播种技术特点，基于Ansys Workbench 19.2进行基于种绳模式胡萝卜播种机主体框架的6处关键部位（与滴灌带装设结构接触位置、种绳装设结构支撑轴位置、滴灌带铺设结构的开沟器上方位置、导种绳滑刀种绳出口位置、扶手位置、与垄型整理结构销轴接触位置）的工作状态研究。通过模态分析，得出主体框架前6阶模态固有频率及振型，在此基础上，通过谐响应分析得出不同谐振频率对主体框架6处可能影响工作性能的关键部位的振幅响应，仿真结果表明，单缸机工作转速2 500 r/min时，主体框架的6处关键部位的x轴、y轴、z轴3个方向谐响应振幅分别为0.006 mm，0.002 mm，0.013 mm；0.008 mm，0.01 mm，0.012 mm；0.004 mm，0.003 mm，0.003 mm；0.004 mm，0.005 mm，0.017 mm；0.007 mm，0.017 mm，0.008 mm；0.003 mm，0.107 mm，0.036 mm，对种绳埋设过程无影响，工作状态稳定，同时为其他执行部件提供稳定的固定连接工作平台，为更好地保护种绳，保证作业质量与稳定性，获得主体框架的工作条件，进一步优化主体框架工作环境提供理论依据。

关键词: 胡萝卜, 种绳, 播种机, 模态分析, 谐响应分析

Abstract: Harmonic response of the main frame of carrot sowing machine based on seed tape planting method affects overall working quality. Therefore, combined with the agronomic requirements of carrot seeding and the characteristics of seed tape planting method, it is necessary to optimize the main frame structure and ensure the working quality. There are 6 parts of the main frame structure that may directly affect the working performance. These include the position contacting with installation structure of drop irrigation belt, support shaft of installation structure of seed tape, surface above the trench opener of laying structure of drop irrigation belt, exit position of seed tape, handrail, and position contacting with pin roll of structure of tidying up the ridge. The working state of the 6 parts was analyzed using Ansys Workbench 19.2. Through modal analysis, the natural frequencies and modes of the first 6 modes of the main frame structure were obtained. Further, through harmonic response analysis, amplitude response of different frequency to the 6 parts were obtained. Simulation results showed that at 2 500 r/min working speed of single cylinder machine, the amplitudes of xaxis, yaxis and zaxis at the 6 parts were 0.006 mm, 0.002 mm, 0.013 mm; 0.008 mm, 0.01 mm, 0.012 mm; 0.004 mm, 0.003 mm, 0.003 mm; 0.004 mm, 0.005 mm, 0.017 mm; 0.007 mm, 0.017 mm, 0.008 mm; and 0.003 mm, 0.107 mm, 0.036 mm, respectively. It was observed that the designed main frame had no influence on the embedding process of seed tape and the working state of the main frame structure was stable. The main frame provided a stable fixed connection working platform for other execution components. Harmonic response analysis of the main frame provided a theoretical basis for better protecting seed tape, ensuring operation quality and operation stability, obtaining working conditions of the main frame, and further optimizing working environment of the main frame.

Key words: carrot, seed tape, sowing machine, modal analysis, harmonic response analysis

中图分类号:

S223.2+5

刘曙光, 王家胜, 张梅, 尹宝全, 马云飞, 潘仕梅. 基于种绳模式胡萝卜播种机主体框架谐响应分析[J]. 中国农机化学报, 2022, 43(5): 1-6.

Liu Shuguang, Wang Jiasheng, Zhang Mei, Yin Baoquan, Ma Yunfei, Pan Shimei.. Analysis of harmonic response of the main frame of carrot sowing machine based on seed tape planting method[J]. Journal of Chinese Agricultural Mechanization, 2022, 43(5): 1-6.

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