红枣收获机激振装置激振频率优化与试验

Optimization and Experiment of Vibration Device Shaking Frequency of Jujube Harvester

为提高红枣收获机振动收获效率,对激振装置激振频率进行了优化。首先,建立激振装置与枣树振动系统动力学模型,获得激振装置曲柄转动角频率为2.7rad/s,激振频率为16.9Hz;其次,在ADAMS环境下进行运动学仿真分析,当曲柄转动角频率为2.7rad/s时,机构运动较平稳、无剧烈振动现象,装置机构运动满足要求;最后,对激振装置工作性能及作业效果进行田间试验。试验结果表明:当液压马达转速为25.0~26.5r/min时,即激振频率为16.5~17.4Hz,红枣采净率大于90%,红枣损伤率小于8%,装置各项性能均满足要求,可为红枣收获机激振装置激振频率设定提供理论依据和技术支持。

In order to improve the vibration harvesting efficiency of jujube harvester, this study optimizes the shaking frequency of the vibration device. Firstly, the dynamic model of the vibration system and jujube tree was established, and the rotation angle of the vibration device was found to be 2.7rad/s and the shaking frequency was 16.9Hz. Secondly, the kinematics simulation is carried out in the ADAMS environment.When the crank angle of rotation is 2.7rad/s, the simulation results show that the device moves more smoothly and without violent vibration, and the movement of the device meets the requirements. Finally, field tests on the working performance and working efficiency of the excitation device show that when the motor speed is 25.0-26.5r/min, the shaking frequency is 16.5-17.4Hz, the jujube harvesting rate is more than 90% and the jujube damage rate is less than 8% during the harvesting, This study provides the theoretical basis and technical support for setting the shaking frequency of jujube harvester vibration device.