Taking into account construction parameters of crankshaft when evaluating characteristics of its equivalent torsion scheme

Khaliullin, Farit; Shaikhutdinov, Rafis R.; Shakirov, Renat; Ivanov, A. G.

doi:10.22616/erdev.2020.19.tf263

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…To achieve the task, we will use the graphoanalytical method of determining the unknown forces. The essence of which is the construction of a system of equations of equilibrium of the system, in which the links imposed on the rod are discarded and instead of them the forces are specified [23,24]. The equations of equilibrium are:…”

Section: Proposed Solutionmentioning

confidence: 99%

Tractor linkage loads with adjustable characteristics

Khaliullin,

Yakhin,

Imameev

et al. 2024

E3S Web Conf.

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Efficient use of agricultural tractors is largely determined by the operating modes of its power units. Taking into account the variable nature of external loads, it is necessary to provide structural devices in the tractor, which smooth out changes in hook load, thus reducing the negative impact of external conditions on the operation of its power plant. The present paper is devoted to the design of a tractor attachment with variable characteristics. The methods of studying the variable traction force are analyzed on the output parameters of the technological process, as well as on the power and economic indicators of the power unit. Force analysis of the proposed attachment device is carried out and formulas are obtained to determine the forces and moments at the characteristic points of the device. The paper is of interest to engineers and technicians involved in the creation of promising design schemes for tractor tractors of various operational purposes.

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Section: Proposed Solutionmentioning

confidence: 99%

Tractor linkage loads with adjustable characteristics

Khaliullin,

Yakhin,

Imameev

et al. 2024

E3S Web Conf.

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show abstract

“…Using the computational and graphical method, we determine the parameters of the equivalent torsional circuit (Table 1). To simplify the calculations, we accept the assumption about the identity of the plots between the motor masses [15]. To determine the natural oscillation frequencies, the application software package "MATLAB" is used and the program for working with spreadsheets "Microsoft Excel".…”

Section: Status Of the Issuementioning

confidence: 99%

Torsional vibrations of car crankshaft engine taking into account elements of transmission

Khaliullin

Vagizov

Shakirov

et al. 2021

20th International Scientific Conference Engineering for Rural Development Proceedings

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The article is devoted to assessing the influence of the parameters of car transmission elements on the nature of the resulting torsional vibrations of the crankshaft of its power plant. As a rule, at present, the study of torsional vibrations of the crankshafts of piston internal combustion engines is carried out separately from the conditions of their operation. Only the operating modes of the engines, the torques of individual cylinders are considered, taking into account the order of operation and the angle between the flashes. If necessary, instead of a linear equivalent torsional circuit, branched circuits are considered that take into account the influence of individual engine mechanisms. Perturbing moments in such schemes occur only on the crank of the crankshaft. Only engine operating modes are considered, which take into account the elements of the car transmission and their influence on the nature of torsional vibrations along the entire length of the driven shaft. The moments of inertia of each transmission element and the stiffness of the equivalent torsional circuit sections are determined. The oscillation equations of the equivalent design scheme are drawn up taking into account the transmission elements. The values of the natural oscillation frequencies are determined by solution of homogeneous differential equations. The influence of the external environment can be estimated by applying perturbing the moment per equivalent mass replacing elements of the undercarriage of the car. Given the large values of the moments of inertia of the elements of transmission and the frequency range of their own vibrations, it is possible to explain the displacement of the amplitude of vibrations and their nodes. The considered technique is of interest for scientific and technical workers, and designers involved in the design of transmission elements for motor vehicles.

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“…Dividing this segment into equal N parts of length N  2 each, we then determine by direct measurement the ordinates of the given torque curve corresponding to the points of division [3,4]. Denote the coordinates of the points of the torque curve by…”

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confidence: 99%

Harmonic analysis of the torque of autotractor engines by speed and load modes of operation

Khaliullin,

Yakhin,

Yakovlev

et al. 2024

E3S Web Conf.

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When assessing the cause of torsional vibrations on the crankshaft of tractor engines, forced vibrations are taken into account, which are provoked by torques arising from each cylinder and transmitted to the connecting rod necks, taking into account the order of operation of the cylinders. Researchers have only calculated or experimental values of the torque for different angular positions of the crankshaft with a certain sampling step. The algorithm for solving the torsional vibration problem involves the decomposition of discrete values of the torque of one cylinder into a harmonic series in order to determine its amplitudes and phase shifts. The adequacy of the resulting decomposition is determined by the number of harmonics taken into account and, as a rule, includes 10-12 harmonics. At the same time, it is necessary to perform such decompositions for each speed and load mode, which increases the amount of calculations. An algorithm is proposed that considers these modes separately, and depending on the values of the gas and inertial forces, allows using the characteristics of the nominal operating mode and the decomposition with a smaller number of terms. In this case, the results of the expansions have a satisfactory convergence. The proposed method for determining the parameters of motor harmonics of exciting moments under changing speed and load modes of the internal combustion engine, can be useful in the design of new and fine-tuning dampers of torsional vibrations of crankshafts.

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Taking into account construction parameters of crankshaft when evaluating characteristics of its equivalent torsion scheme

Cited by 4 publications

References 4 publications

Tractor linkage loads with adjustable characteristics

Tractor linkage loads with adjustable characteristics

Torsional vibrations of car crankshaft engine taking into account elements of transmission

Harmonic analysis of the torque of autotractor engines by speed and load modes of operation

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