夹持式棉花精密穴播轮作业振动对取种的影响

Effect of clamping cotton-seed precision dibbler operating vibration on seeding

为了提高夹持式棉花精密穴播轮对作业地表的适应性,通过分析穴播轮作业时的主要振动形式及其振动加速度值得出穴播轮作业时存在失重和超重现象。穴播轮的作业振动对种子的可靠夹持影响较大,分析得出在超重状态下种子可以被可靠夹持,在失重状态下重块会产生反向转动,夹种口张开,种子不受夹持力,处于不稳定状态,依据研究结果改进了穴播轮的取种机构,经试验改进后的穴播轮在振动条件下作业时空穴率由9.3%降低到2.6%,穴播轮对地面的适应能力有明显提高。

In order to improve the adaptability of clamping cotton seed precision dibbler to earth surface,a conclusion has been obtained that there were weightlessness and hypergravity through analyzing the main forms and values of the vibration of operating dibbler.The operation vibrations of the dibbler had great influence on seed clamping reliability.The seeds in the clamping port of the seeding devices could be clamped reliably in the condition of hypergravity,while they were unstable under weightlessness condition for the weight might rotate reversely,and seeds in the clamping port of the seeding devices would lose clamping power.The mechanism of the dibbler seeding devices was improved according to the research results.Experiment results showed that the rate of empty seed of improved dibbler declined from 9.3 percent to 2.6 percent.Therefore,the seeding properties of the dibbler were well raised,the affects of vibration on the dibbler were reduced,and the working reliability of the dibbler was obviously enhanced.