Computer Simulation of the Operation of the Recuperative Swivel Bunk Device of a Hauling Tractor with a Timber Drug

Posmetyev, Valeryi I.; Никонов, Вадим; Manukovskii, Andrey Yu.; Posmetyev, Viktor V.

doi:10.37482/0536-1036-2022-5-85-99

Cited by 3 publications

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“…To study the working processes of an energy-saving pneumohydraulic coupling device of a tractor for forest moving works with a trailer during the removal of long-length timber in various conditions of logging roads, the method of mathematical modeling was used [1]. The design scheme of the pneumohydraulic coupling device is shown in the Figure (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Analysis of studies of work processes of energy-saving hydraulic drives and devices of highly loaded technological machines and equipment

Popikov,

Derepasko,

Khomenko

et al. 2023

E3S Web of Conf.

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The analysis of studies of the work processes of energy-saving hydraulic drives and devices was carried out in order to identify effective ways to reduce the dynamic loading and energy intensity of highly loaded technological machines and equipment. When studying the working processes of an energy-saving pneumohydraulic fifth wheel coupling of a timber tractor with a trailer, it was found that the recuperated power was 5.1-5.9 kW, and the average acceleration of the semi-trailer was 0.8 ... 0.81 m/s2. The energy-saving device of the Amkodor 208V front loader, which includes two torsion springs installed between the frame and the boom, reduces energy costs by 26%. The paper presents studies on energy saving during the operation of a hydraulic press with a pump-accumulator power supply. The results of studies of the energy-saving hydraulic drive of a forest manipulator and a chokerless skidding grip are presented. The energy-saving hydraulic drive of the manipulator column makes it possible to reduce the energy consumption of the column rotation by 25% and increase the productivity of the manipulator by 14%, and the chokerless grip hydraulic accumulator stores power in the range of 1.7 ... 2.1 kW. It is concluded that it is expedient to conduct further studies of the dynamics of energy-saving hydraulic drives of load-lifting mechanisms of manipulators of heavily loaded forestry vehicles.

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Section: Methodsmentioning

confidence: 99%

Analysis of studies of work processes of energy-saving hydraulic drives and devices of highly loaded technological machines and equipment

Popikov,

Derepasko,

Khomenko

et al. 2023

E3S Web of Conf.

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Influence of Hydraulic Drive Compliance on Dynamic Loading of Forest Manipulator Mechanisms

Evsikov,

Bogdanov,

Popikova

et al. 2023

Forestry Engineering Journal

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The article analyzes the research into the dynamics of the hydraulic drive of technological machines and equipment. It has been established that insufficient attention has been paid to the issues of the influence of hydraulic drive compliance on the dynamic loading of individual mechanisms. The purpose of the work is to assess the effect of hydraulic drive compliance on the dynamic loading of forest manipulator mechanisms when improving the layout of hydraulic cylinders based on mathematical modeling. A mathematical model of the movement of the manipulator boom is presented, taking into account the forces of inertia and the flow rate of the working fluid. A model estimate of the dynamics of the hydraulic drive and the pressure of the working fluid was made when the boom of the forest manipulator is turned. The problem was solved as part of the work on a software package for studying the pressure jumps of the working fluid in hydraulic cylinders. The evaluation results showed that the optimal points of attachment of the hydraulic cylinder to the boom and to the rotary column depend on the compliance coefficient. In a computational experiment to determine the optimal layout of the hydraulic cylinder of the lifting mechanism of the manipulator boom, according to the criterion of minimizing the pressure surges of the working fluid, the optimal points of attachment of the hydraulic cylinder to the boom b1 = 0.9 m and to the rotary column OB = 0.7 m were obtained, and when taking into account the compliance coefficient were new optimal hydraulic cylinder attachment points were obtained: b1 = 1 m, OB = 0.85 m. To interpret the model and clarify the effect of hydraulic drive compliance on the dynamic loading of forest manipulator mechanisms, it is necessary to conduct bench tests.

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Simulation modeling of resonance phenomena during the operation of regenerative hydraulic shock absorbers in the suspensions of trailing links of timber road trains

Nikonov,

Posmetev,

Posmetev

et al. 2024

Forestry Engineering Journal

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The article solves the problem of increasing the efficiency of timber truck trains of different configuration under unsteady driving modes in the process of timber transportation in the conditions of insufficiently equipped forest roads. The experience of operation of forest road transport shows that the most part of fuel energy is spent by it on heat losses arising in its units and systems. The necessity to reduce energy losses in suspensions of trailing links of forest road trains by means of transformation of this energy, accumulation and subsequent useful use is substantiated. In order to increase the efficiency of forest road trains the perspective designs of trailing links equipped with recuperative hydraulic shock absorbers are offered. To assess the performance of the proposed trailing links as part of timber truck trains, mathematical models have been developed that take into account the resonance phenomena occurring during the movement on the supporting surface of the studied timber truck trains. The research was carried out with the help of the developed computer programs. Equipping the suspensions of trailing links with regenerative hydraulic shock absorbers allows reducing the amplitude of resonance vibrations for a forestry tractor-trailer truck from 87 cm to 26 cm, for a forestry tractor-trailer truck from 27 cm to 20 cm and for a forestry truck-trailer combination from 46 cm to 33 cm. The recuperated power generated by the trailer link suspension was 7.8 kW for a truck-trailer combination, 9.1 kW for a forestry tractor-trailer combination, and 22.4 kW for a forestry tractor-trailer combination. The optimum value of the damping coefficient of an individual regenerative hydraulic shock absorber was 30 kN · s/m.

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Computer Simulation of the Operation of the Recuperative Swivel Bunk Device of a Hauling Tractor with a Timber Drug

Cited by 3 publications

References 0 publications

Analysis of studies of work processes of energy-saving hydraulic drives and devices of highly loaded technological machines and equipment

Analysis of studies of work processes of energy-saving hydraulic drives and devices of highly loaded technological machines and equipment

Influence of Hydraulic Drive Compliance on Dynamic Loading of Forest Manipulator Mechanisms

Simulation modeling of resonance phenomena during the operation of regenerative hydraulic shock absorbers in the suspensions of trailing links of timber road trains

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