Authors

Abstract

Machine quality, mowing efficiency and work reliability of lawn mowers are main issues concerned in hilly and mountainous regions. Taking a rotary lawn mower of single-disc type as research object, structure and parameter design of the mower was defined according to empirical formula, performance of grass cutting and modal analysis of the cutting blades were conducted by means of EDEM and Creo, and field test was conducted to verify the overall performance of the machine. Results showed that symmetrically installed 2 cutting blades with revolution speed 3500 r/min and forward speed 1.4 m/s showed good performance of grass cutting and stability. The velocity of grass particles of cut grass was mostly in the range of 1.1-1.5 m/s, and the velocity of broken grass was stable, which proved good harvest and gathering of grass. The height of remained stubbles was about 50 mm, and the length of cut grass was distributed in the range of 30-60 mm, which met requirements of forage production.

Abstract in Chinese

丘陵山地割草机的机器质量、割草效率和工作可靠性广受关注。本研究以小型单圆盘式旋转割草机为研究对象，根据经验公式对其进行了结构和参数设计，基于EDEM和Creo对割草性能和切割刀片振动模态进行了分析，并割草机的整机性能进行了田间试验。结果表明，对称布置2把切割刀片，在旋转速度3500r/min，前进速度1.4m/s的条件下，切草性能和稳定性俱佳。被切草粒子的速度值主要范围为1.1-1.5m/s，且速度稳定，有利于牧草收割和拢草。割后草茬高度约为50mm，割后草段长度范围30-60mm，能满足牧草生产要求。