Drawbar Parameters of Tractor with Prototypes of Driving Wheels and Standard Tyres

Majdan, Radoslav; Abrahám, Rudolf; Tkáč, Zdenko; Mojžiš, Miroslav

doi:10.2478/ata-2018-0012

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…In this section, two special driving wheels, namely the spike tires and blade wheels, are presented. The principle and test of special driving wheels were published by [ 24 , 25 , 26 ]. Both were designed at the Slovak University of Agriculture in Nitra.…”

Section: Methodsmentioning

confidence: 99%

Frequency Spectra Analysis of Drawbar Pulls Generated by Special Driving Wheels Improving Tractive Performance

Abrahám

Majdan

Kollárová

et al. 2021

Sensors

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Driving wheel operation is characterized by force interactions with the ground, manifested in the form of vibrations. Signals generated by driving wheels can be analyzed in the frequency spectrum of tractor drawbar pull. The paper presents the analysis of a drawbar pull signal generated by a tractor equipped with two types of special driving wheels and standard tires. Beside the evaluation of special driving wheels’ properties according to drawbar power, the frequency spectra of measured signals were analyzed using a fast Fourier transformation. The model spectrum intervals for the standard tires, spike tires, and blade wheels were calculated according to the number of rubber lugs, blades, or spikes and compared with the experimental results. The results showed that the specific frequencies typical for blades and spikes were identified in model spectrum intervals. In the case of standard tires, the spectrum components typical for rubber lugs of the tire tread pattern were not identified. The highest amplitude of the typical frequency component was detected in the case of blades wheels, which showed the highest difference in drawbar power in comparison with the standard tires. Smaller dimensions of spikes resulted in lower amplitude and lower difference in drawbar power in comparison with the standard tires.

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Section: Methodsmentioning

confidence: 99%

Frequency Spectra Analysis of Drawbar Pulls Generated by Special Driving Wheels Improving Tractive Performance

Abrahám

Majdan

Kollárová

et al. 2021

Sensors

Self Cite

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“…On the other hand, the self-cleaning properties had no negative effect at a low SMC. Based on previous designs presented by the authors of this study [41,42], the new design of the spike device was improved. A new principle of the control system changing the active and inactive position of the spikes was developed.…”

Section: Properties Of the Spike Device With A Worm Gear Unitmentioning

confidence: 99%

Spike Device with Worm Gear Unit for Driving Wheels to Improve the Traction Performance of Compact Tractors on Grass Plots

Abrahám,

Majdan,

Kollárová

et al. 2024

Agriculture

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In general, energy loss reduction via the interaction of tires with the ground improves tractor traction performance when a drawbar pull is generated. This paper is examines the driving wheels with steel spikes for a tractor equipped with modern radial tires. An improved design of the spike device that allows for the change between an active and inactive position of the spikes is presented. The traction performance of a compact articulated tractor with the spike device was tested on a grass plot with two soil moisture contents (SMC). The highest difference in the drawbar pull in the range from 14.2% to 40.5% and from 17.1% to 36.8% was reached by the spikes in the active position in comparison with the tires without spikes, which were at the slip range from 45% to 5% in the case of the low SMC when the test tractor was in the 3rd and 1st gear. The motion resistance difference between the spikes in the active position and the tires without spikes was 11.8% and 2.5% at the low and medium SMC, respectively. At the low and medium SMC, the highest tractive efficiency of 0.765 (0.721) and 0.757 (0.731) was reached by the spikes in the active position when the test tractor was in the 1st (3rd) gear in comparison with 0.736 (0.7) and 0.723 (0.708) in the case of the tires without spikes. The results indicated that the spike device allowed for the improvement of tractor tractive performance.

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“…The principle of the spike tires developed at the Slovak University of Agriculture in Nitra (Slovakia) was published by References [48][49][50]. Special driving wheels (Figure 1) are spike tires using spikes (2) on spike segments (1) to improve the vehicle tractive performance.…”

Section: Principle Of Special Driving Wheelsmentioning

confidence: 99%

“…The load cell EMS 150 (Emsyst, s.r.o., Trenčín, Slovakia), with an accuracy class of 0.2, rated capacity of 10 kN, and rated output of 0-10 V, was placed between the load and test tractor. The data logger HMG 3010 (Hydac GmbH, Sulzbach/Saar, Germany) [48][49][50], with a measurement accuracy of voltage input (0-10 V): ≤±0.1% of the full scale, was used to record the drawbar pull. The sampling frequency was 1 kHz.…”

Section: Measurement Of Maximum Drawbar Pull At 100% Driving Wheels Slipmentioning

confidence: 99%

Fatigue Analysis of Spike Segment of Special Tractor Wheels in Terms of Design Improvement for Chernozem Soil

et al. 2022

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The driving wheels affect the tractive efficiency, fuel consumption, and soil compaction. This study presents the fatigue analysis of a spike segment that is the main part of an innovative driving wheels designed to improve tractor tractive performance. The design improvement was proposed for Chernozem soil allowing the full penetration of spikes. The spike segment was loaded by forces resulting from the maximum drawbar pull at 100% wheel slip and penetrometer resistance. A drawbar pull increase caused by the spike tires was also calculated. The experiments were performed using a subcompact tractor in the first gear on a grass field at soil moisture 18.8%. Gerber theory was used for the fatigue analysis performed using ANSYS software. The dependances of the safety factor on the horizontal rod diameter and the number of load cycles was constructed. The safety factor of 1.73 calculated for the spike segment made of steel S355 is suitable for the reduction of the actual horizontal rod diameter (12 mm). The fatigue analysis showed a safety factor of 1.28 at 100,000 load cycles in the case of a reduced diameter (10 mm). A diameter of 8 mm was also simulated, but the calculated safety factors do not allow it in terms of safe operation.

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Drawbar Parameters of Tractor with Prototypes of Driving Wheels and Standard Tyres

Cited by 6 publications

References 9 publications

Frequency Spectra Analysis of Drawbar Pulls Generated by Special Driving Wheels Improving Tractive Performance

Frequency Spectra Analysis of Drawbar Pulls Generated by Special Driving Wheels Improving Tractive Performance

Spike Device with Worm Gear Unit for Driving Wheels to Improve the Traction Performance of Compact Tractors on Grass Plots

Fatigue Analysis of Spike Segment of Special Tractor Wheels in Terms of Design Improvement for Chernozem Soil

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