Field experimental investigations of performance-and-technological indicators of operation of swath header asymmetric machine-and-tractor aggregate

Bulgakov, Volodymyr; Nadykto, Volodymyr; Kaletnik, H.; Ivanovs, Semjons

doi:10.22616/erdev2018.17.n269

Cited by 4 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On uniting equations (4), (5), (9) and (13)(14)(15)(16)(17)(18)(19)) into a single system, we receive the mathematical model of realization in the aggregate with traction and drive working units of the useful power of the tractor, which will ensure maximal ef¿ ciency and minimal fuel expense in actual working conditions:…”

Section: Results Of Studies and Their Discussionmentioning

confidence: 99%

“…The authors of several latest educational textbooks and publications [14][15][16][17][18] suggest a new method of calculations on assembling machine-tractor aggregates based on current technical information with clear sequence of engineering computations. But the mentioned references consider the issues of assembling soil-processing aggregates with traction and drive working units based on energy-saturated tractors of traction-energy concept in a trivial and shallow way.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Studying the conditions of assembling traction-drive soil-processing aggregates with tractors of traction-energy concept

Аdаmchuk¹,

Булгаков²,

Holovach³

et al. 2018

Agric. sci. pract.

View full text Add to dashboard Cite

At present the appearance of novel energy-saturated tractors of traction-energy concept requires not only new principles of their aggregating but also the method of assembling aggregates on their basis. Aim. To increase the effi ciency of assembling soil-processing aggregates with traction and drive working units based on energy- saturated tractors of traction-energy concept. Methods. The study involved the use of the methods of tractor theory, use of machines, fi eld experimental investigations, statistical methods of processing study results, as well as methods of composing programs and numerical computations on PC. Results. The method of assem- bling soil-processing aggregates with traction and drive working units was suggested on the basis of technical information, available for a wide audience of specialists. Conclusions. The problem of assembling soil-pro- cessing aggregates with traction and drive working units on the basis of energy-saturated tractors of tractor- energy concept should be solved with the consideration of the suggested condition of useful power via traction, determined by the friction properties of a tractor, and the power which the tractor can actually transmit via a power take-off shaft or a hydrosystem.

show abstract

Section: Results Of Studies and Their Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Studying the conditions of assembling traction-drive soil-processing aggregates with tractors of traction-energy concept

Аdаmchuk¹,

Булгаков²,

Holovach³

et al. 2018

Agric. sci. pract.

View full text Add to dashboard Cite

show abstract

“…Trailed and mounted harvesting units implement the two-phase method of harvesting cereal crops, forage grasses and rapeseed. The former includes a self-propelled vehicle (usually a tractor) and a trailed windrower (Bulgakov et al, 2018a;Konstantinov et al, 2019;Undersander et al, 2011). Since the latter is located to the tractor's right, its traction resistance creates a momentum that turns the entire harvesting unit in a horizontal plane clockwise (Bulgakov et al, 2018b).…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on the Operation of Agricultural Crops Mowing Unit with Simultaneous Chopping and Incorporation of Stubble Into the Soil

Nadykto,

Kiurchev,

Chorna

et al. 2023

Agricultural Engineering

Self Cite

View full text Add to dashboard Cite

For harvesting crops, one-phase and two-phase methods are most often used. When implementing the second one, mounted and trailed units are used. The latter is becoming less and less used due to the problems with movement stability in the horizontal plane because of the asymmetric layout. A stubble background, which is susceptible to solar and wind influences, is formed as a consequence of application of the mounted harvesting unit, As a result, the field’s soil in the inter-swath space intensively loses moisture. A harvesting unit based on a tractor with rear steerable wheels has been designed to eliminate this shortcoming. A header is mounted on its front hitch linkage system, and a disc harrow is mounted on the rear one. During the working movement, such a harvesting unit mows the crop into swaths, chops the stubble in the inter-swath space, and simultaneously incorporates it into the soil. This article presents the operation results of such a unit for harvesting winter wheat, oats, and sudan grass. Research has established that oscillations in the deviations of the mowed crops’ swaths from a straight line are of low frequency. The variances spectra of this process, as follows from the Analysis of normalized spectral densities, are concentrated in the frequency range of 0-0.5 m−1. The mean value velocities of the harvesting unit are 2.13-2.61 m·s−1, which is 0.17-0.21 Hz. The variances of oscillations in the header operating width, the cut crop’s swath width, and the disc harrow’s width are concentrated in approximately the same low-frequency range, the maximum value of which is small and does not exceed 0.9 m−1 or 0.37 Hz. The oscillation processes of the mowed crops’ stubble height have a higher frequency. The cutoff frequency of their normalized spectral densities is at the level of 3.0 m−1. In terms of time, considering the harvesting unit movement velocity of 2.13-2.61 m·s−1, this is 1.02-1.25 Hz. At the same time, oscillations in the stubble height of mowed crops are characterized by small variances, the maximum value of which does not exceed 11 cm2.

show abstract

“…The most important task in the study of the turning agility of implement-and-tractor aggregates is the evaluation of the parameters that most affect the process, and establishment of their effect (through analytical equations) on the execution of the turning [18,19]. The turning radius depends mainly only on the parameters of the tractor in the case of trailed implements [17], even if the turning radius of the aggregate is significantly increased when aggregating trailed implements [20,21]. Furthermore, several types of trailed implements that are commonly used in agricultural work are arranged asymmetrically with respect to the tractor.…”

mentioning

confidence: 99%

Theoretical Investigations of the Headland Turning Agility of a Trailed Asymmetric Implement-and-Tractor Aggregate

et al. 2019

Self Cite

View full text Add to dashboard Cite

Turning time occupies a significant part of the operations carried out by implement-andtractor aggregates, especially in fields with short runs. Incorrectly executed turns increase the width of the turning strips, significantly increasing the idle path of the implement-and-tractor aggregate, with negative effect on its efficiency. The objective of this paper was to theoretically analyse the turning agility of an asymmetric implement-and-tractor aggregate, taking into account its forward speed and design parameters. Considering a trailed asymmetric swath reaper and tractor aggregate, the obtained equations allowed a numerical simulation in order to evaluate the headland turning agility of this implement-and-tractor aggregate. The minimal radii of the trailed asymmetric swath reaper and tractor aggregate are, respectively, 8.33 m for right-side turn and 4.90 m for left-side turn. Furthermore, the optimal angle between the longitudinal axis of the aggregating tractor and the hitch bar of the trailed asymmetric implement exists only in the case of left-side U-turns and its value is 1.12 rad (64 • ). It is not possible to cover right-side U-turns or both right-and left-side pear-shaped loop-turn in the optimal mode. Agriculture 2019, 9, 224 2 of 11 of the implement-and-tractor aggregate [11,12]. Incorrectly executed turns increase the width of the turning strips, significantly enlarging the idle path of the implement-and-tractor aggregate, with a negative effect on its efficiency [13]. The ability of an implement-and-tractor aggregate to perform manoeuvres along paths of a certain curvature can be considered as its turning agility, that is to say that the greater the curvature of the indicated path (or the smaller its radius of curvature), the higher the turning agility of the implement-and-tractor aggregate [14].The car theory developed at the present time distinguishes three cases concerning turning agility: neutral turning agility occurs if the curvature of the path does not depend on the car speed, excessive turning agility occurs if the curvature of the path increases with the car speed and insufficient turning agility occurs if the curvature of the path decreases with the car speed increasing [15,16].Obviously, in the theory of the turning agility concerning a car, its forward speed plays a dominant role, as it is usually quite high. Conversely, in the theory of the turning agility regarding the agricultural implement-and-tractor units, speed of motion also plays an important role, but is less dominant than in the theory of the car steering [17]. There is no doubt that the turning agility of an agricultural implement-and-tractor aggregate is affected by its forward speed, but this is less dominant than car turning agility. The most important task in the study of the turning agility of implement-and-tractor aggregates is the evaluation of the parameters that most affect the process, and establishment of their effect (through analytical equations) on the execution of the turning [18,19]. The turning radius depends...

show abstract

Field experimental investigations of performance-and-technological indicators of operation of swath header asymmetric machine-and-tractor aggregate

Cited by 4 publications

References 3 publications

Studying the conditions of assembling traction-drive soil-processing aggregates with tractors of traction-energy concept

Studying the conditions of assembling traction-drive soil-processing aggregates with tractors of traction-energy concept

Experimental Studies on the Operation of Agricultural Crops Mowing Unit with Simultaneous Chopping and Incorporation of Stubble Into the Soil

Theoretical Investigations of the Headland Turning Agility of a Trailed Asymmetric Implement-and-Tractor Aggregate

Contact Info

Product

Resources

About