摘要
为了提升机具的作业性能,该文对振动松土工作单体的速度特性和轨迹特性进行研究,当机具的振动频率较低时,速度比λ<1,松土铲是持续切削的作业过程,增加振动频率使速度比λ>1时,松土铲的作业过程分为切削、后退和追赶3个连续的阶段,各个阶段的持续时间随λ的变化而变化。在前进速度为1km/h、振幅为12.7mm、振动角为28°条件下,对0～10Hz振动频率下的一组工作部件进行土槽试验,振动部件工作最佳的振动频率为4.4Hz,在此频率下,可以减小约40%的牵引阻力和11.7%～59%的功耗。
In order to improve the performance of the vibration scarifier, speed characteristic and trajectory behavior of vibration loosen soil was studied. At the lower frequency with the velocity ratio less than 1, the cutting blade always moved forward to the soil. As the frequency increased and the velocity ratio was greater than 1, the cutting blade moved backward to the soil during part of each cycle. Therefore, the cutting blade went through three phases, namely soil cutting, backing off and catching up respectively. As velocity ratio increasing, the time consumption of different phases changed steadily. When the tines were vibrated with amplitude at the tip of ±12.7 mm and an oscillation angle of 28°using a forward speed of 1 km/h, a soil-bin test was conducted under the frequency of vibration was varied from 0 to 10Hz. Experimental results showed that traction resistance decreased by 40% and power consumption decreased by 11.7%-59% with an optimum vibration frequency of 4.4 Hz.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第12期44-49,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家"863计划"资助项目(2010AA101401)
关键词
农业机械
功耗
速度
振动松土机
激振频率
速度比
agricultural machinery
power
speed
oscillatory tillage
oscillating frequency
velocity ratio
