Stand for Studying Soil Friction

IF 0.5 4区 工程技术 Q4 ENGINEERING, MECHANICAL Journal of Friction and Wear Pub Date : 2024-08-17 DOI:10.3103/S1068366624700156
G. V. Makarevich, I. A. Salnikova, V. V. Saskovets, E. I. Pavalanski
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Abstract

To study the wear and friction force of a solid surface during friction with the ground, a carousel-type laboratory stand was created. The main task was to measure friction forces under various parameters of model soil and speeds of relative movement close to real ones during field agricultural work. Traditional electronic dynamometers are designed for static or slowly varying loads. Laboratory stands with such sensors have a linear design, a limited friction path (up to 2 m), and very low relative movement speeds (up to 0.15 m/s). The short friction path complicates the running-in process at the beginning of the experiment. Integral friction forces depend on speed. The adhesion component depends entirely on the presence of soil water at the interface and, thus, on the time required for water to move to the friction surface. With a carousel design of the stand, the friction path is infinite, and the speed can be increased by an order of magnitude (up to 1.5 m/s). Since studies usually compare the influence of different materials or soil compositions on the results of experiments, the systematic error due to the difference in the friction path from a straight line is insignificant. To measure rapidly changing loads, a force measuring station was developed based on a flat spring and a small displacement mechatronic sensor. The advantage of mechatronic linear displacement sensors is high sensitivity, ease of switching on, and high reliability. Disadvantages include dependence on temperature conditions and consequently the need for calibration in each experiment.

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研究土壤摩擦力的支架
摘要--为了研究固体表面与地面摩擦时的磨损和摩擦力,制作了一个旋转木马式实验台。主要任务是测量田间农活中各种模型土壤参数下的摩擦力和接近真实的相对运动速度。传统的电子测功机是为静态或缓慢变化的负载而设计的。带有此类传感器的实验室台架采用线性设计,摩擦路径有限(最多 2 米),相对运动速度极低(最多 0.15 米/秒)。短摩擦路径使实验开始时的磨合过程变得复杂。整体摩擦力取决于速度。附着力完全取决于界面上土壤水的存在,因此也取决于水移动到摩擦表面所需的时间。采用旋转台的设计,摩擦路径是无限的,速度可以提高一个数量级(最高可达 1.5 米/秒)。由于研究通常是比较不同材料或土壤成分对实验结果的影响,因此摩擦路径与直线的差异造成的系统误差并不明显。为了测量快速变化的载荷,我们开发了一种基于扁平弹簧和小位移机电传感器的测力站。机电一体化线性位移传感器的优点是灵敏度高、易于接通和可靠性高。缺点是依赖温度条件,因此每次实验都需要校准。
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来源期刊
Journal of Friction and Wear
Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
1.50
自引率
28.60%
发文量
21
审稿时长
6-12 weeks
期刊介绍: Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.
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