| 摘要: |
| 本文对同一回转刀盘安装不同数量双翼型刀铲的耕耘阻力,通过改变运动参数进行了初步试验分析。室内土槽试验结果表明,当机组速度由0.303m/s 增加到0.846m/s时,两铲的水平分力 Px 由30.66kgf 增加到54.97kgf;三铲的水平分力 Px 由20.19kgf 增加到45.63kgf;四铲的水平分力由18.88kgf 增加到37.g2kgf。增加刀滚转速,则耕耘阻力减小,比功耗增加。增加刀铲数量,则耕耘阻力、比功耗均下降。提高机组速度,则对耕耘阻力、比功耗的影响与减少刀滚转速趋势一样。本文还对室内试验与田间试验出现的不同结果作了分析,建议整机设计中采用三铲为好。本项研究为驱动型双翼铲的设计及参数选择提供了参考依据。 |
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| An Experimental Study of Tilth Resistance of the Revolving Two-wing Sweep |
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| Abstract: |
| A preliminary experiment and analysis of thilth resistance of two-wing types of different sweeps mounted on the same revolving frame were made through modification of moving parameters in this paper.Hesults obtained from the laboratory soil channel indicated that when the speed of machine was increased from 0.303M/Sec.to 0.846M/Sec.the horizon component force (px) of the three sweeps was increased from 30.56 kgf to 54.97 kgf;that (px) of the three sweeps,increasing from 20.29 kgf to 45.63 kgf;and that (px) of the four sweeps from 18.88 kgf to 37.92 kgf.when the revolutionary speed of the rotary sweep cylinder was increased,tilth resistance was reduced,but the ratio of power consumption was increased.when the number of sweeps was increased.tilth resistance and the ratio of power consumption were decreased.The effect of raising machine speed upon tilth resistance and the ratio of power consumption is the same as that of reducing the revolutionary speed of sweep cylinder. This paper analysed the different results occured in the laboratory and field experiments.It was suggested that three sweeps be used in the designing of the set of machine.This experiment also provided the reference bases for the design of the driven-typr of two-wing sweep and selection of parameters. |
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