基于时域和频域的拖拉机-旋耕机组合振动特性分析

Q2 Agricultural and Biological Sciences Agriculture Pub Date : 2024-07-13 DOI:10.3390/agriculture14071139
Yuanyuan Gao, Yifei Yang, Shuai Fu, Kangyao Feng, Xing Han, Yongyue Hu, Qingzhen Zhu, Xinhua Wei
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引用次数: 0

摘要

良好的播种床是提高播种质量的前提,而复杂的地面激振往往会导致机具弹跳和作业振动,进而影响作业效果。为了提高旋耕作业质量,有必要研究拖拉机旋耕作业时各种振动激励对机组的影响,分析拖拉机、三点悬挂机构和旋耕机之间的振动相互作用关系。为此,在乐星 LS1004 拖拉机(乐星农业装备有限公司,中国青岛)旋耕机装置的不同位置安装了多个三向加速度传感器,以采集不同作业速度下的振动数据,并对不同部件之间的振动特性进行分析。试验结果表明,当机组分别以 2.1 km/h、3.6 km/h 和 4.5 km/h 的速度前进时,拖拉机、三点悬挂机构和旋耕机的振动加速度随着速度的增加而增加,它们之间确实存在相互作用。三点悬挂机构在试验过程中的垂直加速度变化最为显著(5.914 m/s2),这与车速增加和旋耕机的振动传递有关。同时,拖拉机对称结构的垂直振动加速度并不相似,表明存在结构装配问题。从频域分析的角度来看,拖拉机驾驶室处的共振频率在垂直振动环境下有所降低,频率相对较低(0~80 Hz),幅度较小,这可能有利于驾驶员的健康。旋耕组的共振频率在 350 赫兹左右,可利用这一特性适当增加旋耕机的振动,以减少阻力。拖拉机驾驶室的共振频率约为 280 赫兹,在田间作业时必须避免这一频率,以确保驾驶员的健康和减少机器磨损。研究结果可为减少拖拉机旋耕作业时的振动和阻力,以及优化和改进旋耕机和拖拉机的结构提供参考。
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Analysis of Vibration Characteristics of Tractor–Rotary Cultivator Combination Based on Time Domain and Frequency Domain
A good planting bed is a prerequisite for improving planting quality, while complex ground excitation often leads to machine bouncing and operation vibration, which then affects the operation effect. In order to improve the quality of rotary tillage operations, it is necessary to study the effects of various vibration excitations on the unit during tractor rotary tillage operations and analyze the vibration interaction relationship among the tractor, the three-point suspension mechanism, and the rotary tiller. For this purpose, multiple three-way acceleration sensors were installed at different positions on the rotary tiller unit of a Lexing LS1004 tractor(Lexing Agricultural Equipment Co. Ltd., Qingdao, China) to collect vibration data at different operating speeds and conduct vibration characteristic analysis between different components. The test results showed that when the unit moved forward at 2.1 km/h, 3.6 km/h, and 4.5 km/h, respectively, the vibration acceleration of the tractor, the three-point suspension mechanism, and the rotary tiller increased with the increase in speed, and there was indeed interaction between them. The vertical acceleration change during the test in the three-point suspension mechanism was the most significant (5.914 m/s2) and was related to the increase in the speed of the vehicle and the vibration transfer of the rotary tiller. Meanwhile, the vertical vibration acceleration of the tractor’s symmetrical structure was not similar, suggesting the existence of structural assembly problems. From the perspective of frequency domain analysis, the resonant frequency at the cab of the tractor was reduced in a vertical vibration environment, with relatively low frequencies (0~80 Hz) and small magnitudes, which might be beneficial to the driver’s health. The rotary tillage group resonated around 350 Hz, and this characteristic can be used to appropriately increase the vibration of the rotary tiller to reduce resistance. The tractor cab resonated around 280 Hz, which must be avoided during field operations to ensure driver health and reduce machine wear. The research results can provide a reference for reducing vibration and resistance during tractor rotary tillage operations, as well as optimizing and improving the structure of rotary tillers and tractors.
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来源期刊
Agriculture
Agriculture Agricultural and Biological Sciences-Horticulture
CiteScore
1.90
自引率
0.00%
发文量
4
审稿时长
11 weeks
期刊介绍: The Agriculture (Poľnohospodárstvo) is a peer-reviewed international journal that publishes mainly original research papers. The journal examines various aspects of research and is devoted to the publication of papers dealing with the following subjects: plant nutrition, protection, breeding, genetics and biotechnology, quality of plant products, grassland, mountain agriculture and environment, soil science and conservation, mechanization and economics of plant production and other spheres of plant science. Journal is published 4 times per year.
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