An instrumentation system to measure the loads acting on the tractor PTO bearing during rotary tillage

Hensh, Sujit; Tewari, V.K.; Upadhyay, Ganesh

doi:10.1016/j.jterra.2021.04.004

Cited by 17 publications

(3 citation statements)

References 28 publications

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“…In addition to structural analysis, studies evaluating the safety of front-end loaders based on measurements have also been conducted. In these studies, most instrumentation systems use strain gauges to reduce costs and enable miniaturization [14]. Malon et al measured the stress of front-end loader components under static and dynamic loadings to the bucket for the development of a structural analysis model of the front-end loader.…”

Section: Introductionmentioning

confidence: 99%

Experimental Structural Safety Analysis of Front-End Loader of Agricultural Tractor

Kim,

Gim,

Nam

2024

Agriculture

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The agricultural front-end loader is an implement attached to the front of tractors to transport various agricultural materials, including soil. Since they are subjected to various loads due to the working environment, their safety analysis in consideration of actual working conditions is required. However, there are no official standardized test codes to consider various actual working environments currently. In this study, the structural safety of a front-end loader for static and fatigue failures was evaluated using new test code reflecting actual working environments. Thirty-four measurement locations were determined as the stress concentration spots of each component of the front-end loader derived through multibody dynamic simulation. The total testing time was set to 1 h, and the test time for each task was determined considering the duty percentage of the actual loader work. The measurement results showed that the maximum stress that exceeds the material’s yield strength occurred at two locations of the mount, which is the connection to the tractor body, resulting in static yielding. For tasks, the pulling and dumping exhibited the highest stress. The task that had the largest impact on fatigue damage was the dumping. The static safety factor was found to be over 1.93 and the fatigue life met the required lifespan at all measurement locations except for those exhibiting static yielding. Therefore, the most vulnerable part of the front-end loader is the mount, and it is necessary to secure the overall structural integrity by robust design for the mount.

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Section: Introductionmentioning

confidence: 99%

Experimental Structural Safety Analysis of Front-End Loader of Agricultural Tractor

Kim,

Gim,

Nam

2024

Agriculture

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“…This introduces challenges in controlling experimental conditions. Moreover, as tractors engage in tasks such as tillage that involve direct interaction with the soil, the impact of soil becomes more pronounced [22]. Therefore, in order to analyze the dynamic characteristics of the EHPV according to tractor operation, it is essential to establish a database of hydraulic characteristics that accounts for various working conditions including soil physical properties.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Hydraulic Characteristics of Electrohydraulic Proportional Valve (EHPV) for an Auto-Steering Tractor Application

Min

Kim

Lim³

et al. 2023

Machines

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The performance of the electrohydraulic proportional control valve (EHPV) employed in a tractor’s automatic steering system directly influences the steering performance. To develop a highly reliable EHPV, it is essential to analyze the hydraulic characteristics of the EHPV for several working conditions of tractors. This study aimed to measure and analyze the hydraulic characteristics of the EHPV according to tractor working conditions. The flow rate and pressure data of the EHPV were computed through the valve measuring system, and the required power was computed. The experimental conditions were selected based on engine rotational speed and tractor steering angle. As a result, it was discovered that the flow rate, pressure, and power all increased when the engine rotation speed and steering angle conditions increased. Furthermore, the rates of increase in flow rate, pressure, and power based on the increase in the steering angle were higher than when the engine rotation speed increased. In the regression analysis results between the two variables and the hydraulic characteristics of EHPVs, the steering angle demonstrated a higher correlation than the engine rotation speed. In conclusion, the steering angle and engine rotational speed are the major variables in the hydraulic characteristics of EHPVs, and the influence of the steering angle is greater.

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“…Depending on the type (i.e., shape, size, fixing method) of the tested element, the structure and dimensions of test stands differ. However, they all enable experiments to be conducted for small tools which make up a larger structure [ 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Such structural diversity of test stands makes it possible to measure characteristic parameters for the given agricultural machine at the selected nodes [ 21 , 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Shaping the Design Features of a Dynamometer for Measuring Resistance Biaxial Components of Symmetrical Coulters

Marcinkiewicz

Spadło

Staszak

et al. 2021

Sensors

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The article lays out the methodology for shaping the design features of a strain gauge transducer, which would make it possible to study forces and torques generated during the operation of symmetrical seeder coulters. The transducers that have been known up until now cannot be used to determine forces and torques for the coulter configuration adopted by the authors. For this purpose, the design of the transducer in the form of strain gauge beams was used to ensure the accumulated stress concentration. A detailed design was presented in the form of a 3D model, along with a transducer body manufactured on its basis, including the method for arranging the strain gauges thereon. Moreover, the article discusses the methodology of processing voltage signals obtained from component loads. Particular attention was paid to the methodology of determining the load capacity of the transducer structure, based on finite element method (FEM). This made it possible to choose a transducer geometry providing the expected measurement sensitivity and, at the same time, maintaining the best linearity of indications, insignificant coupling error, and a broad measurement range. The article also presents the characteristics of the transducer calibration process and a description of a special test stand designed for this purpose. The transducer developed within the scope of this work provides very high precision of load spectrum reads, thus enabling the performance of a detailed fatigue analysis of the tested designs. Additionally, the versatility it offers makes it easy to adapt to many existing test stands, which is a significant advantage because it eliminates the need to build new test stands.

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An instrumentation system to measure the loads acting on the tractor PTO bearing during rotary tillage

Cited by 17 publications

References 28 publications

Experimental Structural Safety Analysis of Front-End Loader of Agricultural Tractor

Experimental Structural Safety Analysis of Front-End Loader of Agricultural Tractor

Evaluation of Hydraulic Characteristics of Electrohydraulic Proportional Valve (EHPV) for an Auto-Steering Tractor Application

Shaping the Design Features of a Dynamometer for Measuring Resistance Biaxial Components of Symmetrical Coulters

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