Investigation of the Performance of a Screw Conveyor With a Working Body, Made in the Form of a Shaft With Inclined Flat Blades

Bulgakov, Volodymyr; Trokhaniak, Oleksandra; Holovach, Ivan; Аdаmchuk, Valerii; Klendii, Mykola; Ivanovs, Semjons

doi:10.35633/inmateh-67-41

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…V.M. Baranovsky et al (2018) presented the results of a study of technological A study of mixer-feeder equipment operational reliability operations for transporting agricultural production materials in closed fixed buildings. The study of the operations of transporting these materials by screw conveyors described in the article was not only highly appreciated and efficient but also confirmed the possibility of using them in the design of loading and unloading mechanisms for agricultural machinery.…”

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confidence: 99%

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2023

machinery

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The relevance of developing analytical methods for studying the stability of root crop cleaners on tractors is determined by the need to improve the efficiency and quality of root crop head cleaning, as this affects the quality of the final product and its marketable properties. The research aims to increase the stability of the cleaner movement by constructing a mathematical model of its oscillatory motion in the longitudinal-vertical plane and its numerical solution to determine the influence of parameters in response to external disturbances. To achieve this goal, a new theory of the movement of a root crop head cleaner in the longitudinal-vertical plane, mounted behind a wheeled tractor, under the influence of the disturbing effect of irregularities in the longitudinal profile of the soil surface on the amplitude and phase frequency characteristics of its angular oscillations was developed. Using numerical calculations carried out on a personal computer, the conditions were found under which the stability of the cleaner's movement in the specified plane will increase when the stiffness coefficient of the pneumatic tyres of the doubler wheels is 315 kN•m -1 .• This result is achieved when the pressure in the pneumatic wheel tyres is 135 kPa. As for the damping characteristics of the doubler wheel tyres, which are determined by the coefficient μ, it was found that when it changes from 350 N•s•m -1 to 1350 N•s•m -1 , there is an invariance of the delay in the reaction of the cleaner to the disturbing effect when its frequencies change from 0 to 24 s -1 . It was also found that the influence of the geometric dimensions of the cleaner is insignificant in the range of frequencies of oscillations of the ordinates of the longitudinal profile of soil surface irregularities from 0 to 24 s -1 . This follows from the nature of changes in the obtained amplitude-frequency and phase-frequency characteristics. The methodology for constructing a mathematical model of the plane-parallel oscillatory motion of the cleaner can be used in similar analytical studies of other agricultural machines mounted on a wheeled aggregating tractor

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confidence: 99%

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2023

machinery

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A study of mixer-feeder equipment operational reliability

Nоvitskiy,

Banniy,

Novitskyi

et al. 2023

Tehnìka ta energetika

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Modern livestock development trends in the agricultural production structure include the use of feed mixers and distribution equipment. However, a stream of malfunctions and failures is reported for mixer-feeders due to factors that are specific to agricultural enterprises in Ukraine, which reduce the operational reliability of feed mixers and distributors. The study aims to evaluate the quantitative indicators of the in-service reliability of mixer-feeders and develop methods to improve them. The reliability test plan [NMT] was used, which implies a certain number of research objects (N), objects undergoing repair in case of performance loss (M), and tests terminated when the operating time (T) is reached. Initial information was collected and processed, and empirical data on the time between failures of KUHN PROFILE 12.2 DS and PROFILE 14.2 DS mixer-feeders in Ukraine were analysed. The analysis established that the faulty condition of mixers-feeders in the initial operation period is caused by the second complexity group failures. Failures related to the loss of the grinding and mixing mechanism, which limits the average time between failures of the feed mixture and distribution equipment, were identified among the second complexity malfunction group. A statistical analysis of the mixer-feeder failure occurrence was carried out. The failure probability of the grinding-mixing mechanism of the feed mixer was determined to be within the normal distribution law. The main parameters of the given theoretical distribution law were determined by calculation results. The calculations determined that the average time between failures is 3152.0 motor-hours; the standard deviation is 902.6 motor-hours; and the coefficient of variation is 0.40. An average time between failures of the study objects was proved to be consistent with the normal distribution law following Kolmogorov’s agreement criterion. Calculations determined that the average reliability index value, according to the normal distribution law, is within the confidence intervals: 1964.2 motor-hours – lower confidence limit; 4339.8 motor-hours – upper confidence limit. The obtained results may be used to improve the mixer-feeder operational reliability

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Study of injury of loose material of agro-industrial production by working bodies of flexible screw conveyors

Adamchuk,

Bulgakov,

Holovach

et al. 2023

MAAP

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Purpose. Determination of the rational parameters of the process of transportation by the working bodies of flexible screw conveyors with the least trauma to the loose material of agro-industrial production. Methods. The methods of probability theory, mathematical statistics and regression analysis were used for research. Experimental studies of injury of loose material of agro-industrial production depending on the mass of the flexible working body, its rotation frequency and the height of lifting the material. Results. In order to determine the injury of loose material, an experimental setup was developed to study the process of material transportation by flexible wire conveyors. When conducting a multifactorial experiment to determine the injury of loose material of agro-industrial production by the working body of a flexible screw conveyor, the variable factors were: the mass of 1 m of the working body m, the frequency of rotation of the flexible working body n, and the height of lifting the material h. Based on the results of experimental studies, appropriate regression equations and response surfaces were constructed to establish the influence of controlled factors on the injury of loose material of agro-industrial production. The obtained regression equation can be used to determine the injury of grain Y during transportation by a flexible screw conveyor with a sectional working body. Conclutions 1. The method of conducting experimental studies of injury of loose material of agro-industrial production by the working bodies of a flexible screw conveyor has been developed. 2. It was established that the mass of the working body has the maximum influence on the injury of loose material. The next in intensity of influence is the frequency of rotation of the working body. The height of the unloading main has the least significant influence. 3. However experimental studies were conducted for the maximum lifting height of the unloading line h = 1.8 m, which is sufficient for loading machine planters. With a further increase in the value of h, there is a significant increase in the coefficient of filling with the material of the flexible casing, which will obviously lead to more significant damage to the material. Keywords: transportation, loose material of agro-industrial production, flexible screw working body.

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Investigation of the Performance of a Screw Conveyor With a Working Body, Made in the Form of a Shaft With Inclined Flat Blades

Cited by 3 publications

References 7 publications

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A study of mixer-feeder equipment operational reliability

Study of injury of loose material of agro-industrial production by working bodies of flexible screw conveyors

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