Authors

Abstract

This paper proposed a structural design scheme of the hydraulic device of the electro-hydraulic controlled hitch system of a YM554A horticultural tractor with hydraulic device model, and the designed hydraulic device was simulated and tested to verify its performance. Results show that the motion of hydraulic actuator is stable with good response for tillage depth control, while the maximum lifting force of 10.62kN and the static settlement value of 13mm all meet the standard requirements. And the oil pressure changes rapidly with a large fluctuation with the plough position changed from transportation state to tillage state, but it quickly stabilizes, and as the tillage depth becomes larger, the oil pressure drops but remains basically stable with the maximum oil pressure change of 0.35MPa

Abstract in Chinese

本文提出了YM554A园艺拖拉机电液控制系统用液压装置的结构设计方案建立了液压装置模型进行了液压执行器运动仿真和耕作深度控制, 测量了系统的提升力和静沉降值,并在田间测量了不同耕作深度下液压执行机构从运输状态到耕作状态的油压。仿真结果表明，液压执行机构的运动是稳定的，对耕作深度控制有良好的响应,特别是在耕作深度变化时,液压执行机构的响应速度快。台架试验结果表明，最大提升力为10.62kN,半小时内的静沉降值为13mm,均满足标准要求。田间试验的结果表明,当从运输状态变化到耕作状态时,油压波动大,但是很快稳定下来,而且随着耕作深度变大,油压下降但仍基本稳定,最大油压变化为0.35MPa。所设计的液压装置静沉降小,起升力大,响应速度快。