Improving the operational efficiency of tractors by ensuring their ability to perform work

Yahin, Sergej; Gabdrafikov, Fanil'; Khaliullin, Farit; Khusainov, R. M.; Naficov, Insaf

doi:10.1051/bioconf/20201700111

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…При експлуатації тракторів в сільському господарстві під впливом різних факторів посилено зношуються їх деталі і вузли. Показником, що визначає величину зносу, є залишковий ресурс агрегатів і вузлів техніки [10].…”

Section: вступunclassified

Vibration characteristics of tractor gearboxes

Migal¹,

Arhun²,

Hnatov³

2022

VEIT

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Problem. Improving the efficiency, quality, reliability and economy of tractor equipment is one of the most important tasks of modern society. This is due to the fact that in agriculture, tractors can perform up to 80% of various operations. The cost of production, product quality, compliance with the conditions of technological operations, etc. depend on the properties and reliability of tractors. The main factor limiting the effective use of tractors in agriculture is the problem of insufficient reliability of tractors, namely, the reliability of its individual components. One of the most important units is its gearbox. The existing methods for diagnosing tractor gearboxes are designed to detect damage, but they are not able to determine the quality of the gearbox at the design and manufacturing stage. Such an opportunity would greatly simplify the process of diagnosing tractor boxes. Goal. The purpose of the research is to assess the quality of design and manufacture of tractor boxes according to their vibration characteristics by identifying design and manufacturing defects, which will allow developing the ways to improve them. Methodology. Methods for detecting statistical data on the boundary values of structural vibrational parameters and their connection with the technical condition of tractors were used. Experimental research methods and mathematical methods for processing and modulating the results obtained were used as well as the methods of statistical calculation and comparison of vibration characteristics with permissible vibrations that do not affect the acceleration of the process of tractor parts wear. Results. Experimental studies of vibro-diagnostic characteristics of tractors were carried out. Studies were made to measure vibration diagnostic indicators; a spectral analysis of gearbox vibration was carried out. An assessment of the quality of manufacturing parts and assembly of tractor gearboxes was made. Such an assessment was carried out by analyzing the spread of the maximum and minimum vibration levels for a sample of gearboxes. Originality. An assessment was made of the possibilities of reducing vibration levels by observing the technology for the production of tractor boxes. This assessment was based on the analysis of minimum vibration levels of tractor boxes. Statistical processing of the results of experimental studies was carried out with the determination of the arithmetic mean, minimum and maximum vibrations, and the standard deviations of the vibration of gearboxes when the fourth gear of the third (transport) range is engaged. Practical value. Vibro-diagnostic characteristics of tractor boxes make it possible to evaluate the quality of design and manufacture by vibration levels. It was established that the vibration levels of boxes at the manufacturing stage reach 85-113 dB and exceed the permissible vibrations by 10-25 dB. The main sources of gearbox vibration are: defects in the quality of gears and bearing assemblies; their assembly, the use of low-quality bearings, large clearances of bearing fit in the housing, and the problem of gearbox assembly technology.

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Section: вступunclassified

Vibration characteristics of tractor gearboxes

Migal¹,

Arhun²,

Hnatov³

2022

VEIT

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“…When using tractors in agriculture, due to the influence of various factors, their parts and components are subject to more intensive wear. The indicator that determines the wear rate is the remaining lifetime (RL) of equipment units and components (Yahin et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Assessing design and manufacturing quality of tractor gearboxes by their vibration characteristics

Migal

Arhun

Shuliak

et al. 2022

Journal of Vibration and Control

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The paper deals with the development of a vibration-based technique for assessing quality and detecting design and manufacturing defects of tractor gearboxes. It highlights full-scale experimental studies of vibro-diagnostic characteristics of tractor gearboxes including carrying out vibration measurement and spectrum analysis; identifying statistical limit values of structural vibration parameters and their dependence on the technical condition of tractors; and comparing the vibration characteristics with acceptable vibrations which do not affect the acceleration of the process of tractor gearbox wear. All studies were conducted for tractor gearboxes of wheeled tractors T-150K, KhTZ-170, and T-17221 produced by Kharkiv Tractor Plant and equipped with identical tractor gearboxes of the same manufacturer. It has been determined that the vibration levels of gearboxes at the manufacturing stage exceed the acceptable vibrations by 10–30 dB. The main reason for the accelerated development of faults and decrease in the lifetime of most gearbox mechanisms is an increase in vibration loading by 2.5–31.6 times over the acceptable levels. The practical significance of the results obtained is in solving the problem of improving the design and manufacturing of tractor gearboxes T-150k through the use of the developed criteria for permissible vibration by methods of reducing the vibration level of detected defects. All the above mentioned makes it possible to create a complex of normative and technical, and methodological documentation to improve the reliability of tractors.

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Forecasting and operational assessment of the quality of repaired units

Апажев

Shekikhachev

Hazhmetov

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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Evaluation alone is not enough to improve product quality. It is necessary to have not only the estimated indicator itself, but also to declare the factors that influence the formation of quality and to investigate this influence. Only then does it become possible to carry out quality management. To study the quality of repaired products, we use the economic and statistical method, which is as follows. Product quality is considered in two aspects: production and consumer. Manufacturing quality is a set of product properties (physical, chemical, physical and mechanical, etc.) obtained by it in the process of manufacturing or repair. The consumer quality of products manifests itself in the process of consumption (operation) and is determined by the cumulative impact of all characteristics of production quality and conditions of consumption. With the help of the correlation level, two main tasks can be solved: operational quality assessment at the stage of production (repair), based on predicting the consumer quality of the projection according to the known values of its production quality indicators; management of the production quality of products in accordance with a given level of its consumer quality. The most characteristic indicators of the production quality of the repaired units are the errors in the dimensions of the shape of parts, the relative position of their surfaces, the size of the washed out links of the dimensional chains of mechanisms, the physical and mechanical properties of materials, etc. At the repair enterprise, by means of appropriate measurements, the values of the indicators of the production quality of batches of products are determined. Then, in operation, these products are monitored in order to determine their consumer quality. The consumer quality of repaired products can be expressed by a number of indicators, but the most expedient is the use of such an indicator as winding to the first failure caused by aging processes (wear, fatigue failure, etc.). Considering the above, research aimed at predicting and quickly assessing the quality of repaired units is an urgent problem.

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Improving the operational efficiency of tractors by ensuring their ability to perform work

Cited by 3 publications

References 2 publications

Vibration characteristics of tractor gearboxes

Vibration characteristics of tractor gearboxes

Assessing design and manufacturing quality of tractor gearboxes by their vibration characteristics

Forecasting and operational assessment of the quality of repaired units

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